== sanity test 398b: DIO and buffer IO race ============== 11:54:06 (1787846046) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 6.32454 s, 8.0 MB/s mix direct rw 4096 by fio with 4 jobs... mix buffer rw 4096 by fio with 4 jobs... rand-rw: (g=0): rw=randrw, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=psync, iodepth=16 ... fio-3.19 Starting 4 processes rand-rw: (g=0): rw=randrw, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=psync, iodepth=16 ... fio-3.19 Starting 4 processes rand-rw: (groupid=0, jobs=1): err= 0: pid=143973: Thu Aug 27 11:56:43 2026 read: IOPS=11, BW=44.1KiB/s (45.1kB/s)(5992KiB/135974msec) clat (usec): min=34, max=763362, avg=45008.27, stdev=36282.34 lat (usec): min=34, max=763363, avg=45012.70, stdev=36290.39 clat percentiles (usec): | 1.00th=[ 55], 5.00th=[ 73], 10.00th=[ 1582], 20.00th=[ 21365], | 30.00th=[ 27657], 40.00th=[ 32900], 50.00th=[ 39584], 60.00th=[ 46924], | 70.00th=[ 55313], 80.00th=[ 66847], 90.00th=[ 83362], 95.00th=[100140], | 99.00th=[156238], 99.50th=[164627], 99.90th=[337642], 99.95th=[759170], | 99.99th=[759170] bw ( KiB/s): min= 5, max= 112, per=24.96%, avg=43.94, stdev=20.28, samples=266 iops : min= 1, max= 28, avg=10.34, stdev= 5.13, samples=266 write: IOPS=11, BW=46.3KiB/s (47.4kB/s)(6296KiB/135974msec); 0 zone resets clat (usec): min=780, max=600535, avg=43185.32, stdev=47074.73 lat (usec): min=780, max=600538, avg=43191.75, stdev=47073.28 clat percentiles (usec): | 1.00th=[ 1172], 5.00th=[ 1401], 10.00th=[ 1893], 20.00th=[ 4948], | 30.00th=[ 10028], 40.00th=[ 20317], 50.00th=[ 31851], 60.00th=[ 42206], | 70.00th=[ 56361], 80.00th=[ 72877], 90.00th=[101188], 95.00th=[126354], | 99.00th=[196084], 99.50th=[240124], 99.90th=[459277], 99.95th=[599786], | 99.99th=[599786] bw ( KiB/s): min= 7, max= 117, per=25.06%, avg=46.11, stdev=20.75, samples=266 iops : min= 1, max= 29, avg=10.88, stdev= 5.24, samples=266 lat (usec) : 50=0.39%, 100=3.65%, 250=0.49%, 500=0.16%, 750=0.13% lat (usec) : 1000=0.03% lat (msec) : 2=5.40%, 4=3.29%, 10=6.87%, 20=8.82%, 50=35.29% lat (msec) : 100=27.86%, 250=7.36%, 500=0.20%, 750=0.03%, 1000=0.03% cpu : usr=0.10%, sys=5.41%, ctx=6679, majf=0, minf=17 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1498,1574,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=143976: Thu Aug 27 11:56:43 2026 read: IOPS=11, BW=44.4KiB/s (45.5kB/s)(5940KiB/133763msec) clat (usec): min=30, max=587010, avg=43289.04, stdev=34368.61 lat (usec): min=30, max=587012, avg=43291.57, stdev=34369.34 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 71], 10.00th=[ 6259], 20.00th=[ 21103], | 30.00th=[ 25822], 40.00th=[ 32113], 50.00th=[ 37487], 60.00th=[ 44827], | 70.00th=[ 52167], 80.00th=[ 62653], 90.00th=[ 79168], 95.00th=[ 94897], | 99.00th=[152044], 99.50th=[214959], 99.90th=[295699], 99.95th=[583009], | 99.99th=[583009] bw ( KiB/s): min= 5, max= 110, per=25.05%, avg=44.09, stdev=19.47, samples=262 iops : min= 1, max= 27, avg=10.37, stdev= 4.92, samples=262 write: IOPS=11, BW=47.5KiB/s (48.6kB/s)(6348KiB/133763msec); 0 zone resets clat (usec): min=864, max=767474, avg=43380.80, stdev=47183.82 lat (usec): min=866, max=767475, avg=43387.08, stdev=47183.72 clat percentiles (usec): | 1.00th=[ 1205], 5.00th=[ 1385], 10.00th=[ 2008], 20.00th=[ 5407], | 30.00th=[ 9896], 40.00th=[ 21103], 50.00th=[ 31327], 60.00th=[ 42206], | 70.00th=[ 55313], 80.00th=[ 73925], 90.00th=[105382], 95.00th=[124257], | 99.00th=[187696], 99.50th=[221250], 99.90th=[383779], 99.95th=[767558], | 99.99th=[767558] bw ( KiB/s): min= 7, max= 111, per=25.67%, avg=47.24, stdev=21.74, samples=261 iops : min= 1, max= 27, avg=11.17, stdev= 5.48, samples=261 lat (usec) : 50=0.46%, 100=3.32%, 250=0.52%, 500=0.10%, 750=0.10% lat (usec) : 1000=0.20% lat (msec) : 2=5.18%, 4=3.16%, 10=7.71%, 20=8.27%, 50=37.73% lat (msec) : 100=25.55%, 250=7.49%, 500=0.16%, 750=0.03%, 1000=0.03% cpu : usr=0.10%, sys=5.25%, ctx=6568, majf=0, minf=18 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1485,1587,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=143978: Thu Aug 27 11:56:43 2026 read: IOPS=11, BW=45.1KiB/s (46.2kB/s)(6028KiB/133696msec) clat (usec): min=23, max=391249, avg=42578.77, stdev=33348.86 lat (usec): min=24, max=391251, avg=42582.58, stdev=33347.60 clat percentiles (usec): | 1.00th=[ 49], 5.00th=[ 70], 10.00th=[ 116], 20.00th=[ 19530], | 30.00th=[ 25035], 40.00th=[ 30802], 50.00th=[ 36963], 60.00th=[ 44827], | 70.00th=[ 52691], 80.00th=[ 63701], 90.00th=[ 78119], 95.00th=[ 99091], | 99.00th=[149947], 99.50th=[196084], 99.90th=[261096], 99.95th=[392168], | 99.99th=[392168] bw ( KiB/s): min= 7, max= 110, per=25.75%, avg=45.32, stdev=19.73, samples=259 iops : min= 1, max= 27, avg=10.68, stdev= 4.98, samples=259 write: IOPS=11, BW=46.8KiB/s (47.9kB/s)(6260KiB/133696msec); 0 zone resets clat (usec): min=894, max=989466, avg=44037.50, stdev=49052.83 lat (usec): min=896, max=989468, avg=44040.84, stdev=49052.51 clat percentiles (usec): | 1.00th=[ 1188], 5.00th=[ 1418], 10.00th=[ 2024], 20.00th=[ 5276], | 30.00th=[ 10683], 40.00th=[ 21627], 50.00th=[ 32637], 60.00th=[ 44303], | 70.00th=[ 58983], 80.00th=[ 76022], 90.00th=[102237], 95.00th=[124257], | 99.00th=[170918], 99.50th=[189793], 99.90th=[387974], 99.95th=[985662], | 99.99th=[985662] bw ( KiB/s): min= 7, max= 111, per=25.57%, avg=47.06, stdev=20.45, samples=259 iops : min= 1, max= 27, avg=11.12, stdev= 5.14, samples=259 lat (usec) : 50=0.55%, 100=4.23%, 250=0.52%, 500=0.16%, 750=0.03% lat (usec) : 1000=0.10% lat (msec) : 2=5.14%, 4=3.39%, 10=6.74%, 20=9.24%, 50=35.64% lat (msec) : 100=26.30%, 250=7.68%, 500=0.23%, 1000=0.03% cpu : usr=0.08%, sys=5.25%, ctx=6459, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=143979: Thu Aug 27 11:56:43 2026 read: IOPS=11, BW=44.7KiB/s (45.8kB/s)(6052KiB/135453msec) clat (usec): min=36, max=589751, avg=45181.01, stdev=39565.07 lat (usec): min=36, max=589753, avg=45183.70, stdev=39565.66 clat percentiles (usec): | 1.00th=[ 55], 5.00th=[ 68], 10.00th=[ 2343], 20.00th=[ 20579], | 30.00th=[ 27395], 40.00th=[ 32113], 50.00th=[ 38011], 60.00th=[ 44303], | 70.00th=[ 53740], 80.00th=[ 65274], 90.00th=[ 84411], 95.00th=[104334], | 99.00th=[162530], 99.50th=[227541], 99.90th=[467665], 99.95th=[591397], | 99.99th=[591397] bw ( KiB/s): min= 7, max= 119, per=25.70%, avg=45.23, stdev=20.02, samples=261 iops : min= 1, max= 29, avg=10.66, stdev= 5.04, samples=261 write: IOPS=11, BW=46.0KiB/s (47.1kB/s)(6236KiB/135453msec); 0 zone resets clat (usec): min=1057, max=1122.5k, avg=42675.47, stdev=51220.28 lat (usec): min=1059, max=1122.5k, avg=42686.35, stdev=51221.64 clat percentiles (usec): | 1.00th=[ 1205], 5.00th=[ 1418], 10.00th=[ 1926], | 20.00th=[ 5080], 30.00th=[ 9634], 40.00th=[ 19792], | 50.00th=[ 31589], 60.00th=[ 42730], 70.00th=[ 54789], | 80.00th=[ 71828], 90.00th=[ 94897], 95.00th=[ 123208], | 99.00th=[ 191890], 99.50th=[ 240124], 99.90th=[ 404751], | 99.95th=[1115685], 99.99th=[1115685] bw ( KiB/s): min= 7, max= 111, per=25.12%, avg=46.22, stdev=20.12, samples=263 iops : min= 1, max= 27, avg=10.90, stdev= 5.07, samples=263 lat (usec) : 50=0.39%, 100=3.81%, 250=0.42%, 500=0.07%, 750=0.03% lat (msec) : 2=5.34%, 4=3.48%, 10=7.19%, 20=8.85%, 50=36.56% lat (msec) : 100=26.40%, 250=7.10%, 500=0.29%, 750=0.03%, 2000=0.03% cpu : usr=0.09%, sys=5.35%, ctx=6630, majf=0, minf=18 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1513,1559,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=177KiB/s (181kB/s), 44.1KiB/s-45.1KiB/s (45.1kB/s-46.2kB/s), io=23.4MiB (24.6MB), run=133696-135974msec WRITE: bw=185KiB/s (189kB/s), 46.0KiB/s-47.5KiB/s (47.1kB/s-48.6kB/s), io=24.6MiB (25.7MB), run=133696-135974msec rand-rw: (groupid=0, jobs=1): err= 0: pid=143972: Thu Aug 27 11:59:07 2026 read: IOPS=5, BW=21.6KiB/s (22.1kB/s)(5992KiB/277764msec) clat (msec): min=5, max=787, avg=40.32, stdev=41.88 lat (msec): min=5, max=787, avg=40.32, stdev=41.88 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 13], 20.00th=[ 16], | 30.00th=[ 21], 40.00th=[ 25], 50.00th=[ 31], 60.00th=[ 36], | 70.00th=[ 43], 80.00th=[ 55], 90.00th=[ 81], 95.00th=[ 104], | 99.00th=[ 176], 99.50th=[ 247], 99.90th=[ 498], 99.95th=[ 785], | 99.99th=[ 785] bw ( KiB/s): min= 7, max= 96, per=28.20%, avg=23.97, stdev=15.86, samples=482 iops : min= 1, max= 24, avg= 5.35, stdev= 4.02, samples=482 write: IOPS=5, BW=22.7KiB/s (23.2kB/s)(6296KiB/277764msec); 0 zone resets clat (msec): min=33, max=669, avg=137.76, stdev=66.46 lat (msec): min=33, max=669, avg=137.76, stdev=66.46 clat percentiles (msec): | 1.00th=[ 49], 5.00th=[ 61], 10.00th=[ 71], 20.00th=[ 86], | 30.00th=[ 100], 40.00th=[ 111], 50.00th=[ 124], 60.00th=[ 138], | 70.00th=[ 157], 80.00th=[ 182], 90.00th=[ 226], 95.00th=[ 264], | 99.00th=[ 359], 99.50th=[ 422], 99.90th=[ 518], 99.95th=[ 667], | 99.99th=[ 667] bw ( KiB/s): min= 7, max= 64, per=25.24%, avg=22.46, stdev=10.11, samples=539 iops : min= 1, max= 16, avg= 4.97, stdev= 2.57, samples=539 lat (msec) : 10=2.73%, 20=11.72%, 50=24.06%, 100=23.34%, 250=34.83% lat (msec) : 500=3.22%, 750=0.07%, 1000=0.03% cpu : usr=0.05%, sys=1.31%, ctx=5361, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1498,1574,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=143974: Thu Aug 27 11:59:07 2026 read: IOPS=5, BW=21.2KiB/s (21.7kB/s)(5940KiB/279688msec) clat (msec): min=5, max=842, avg=39.39, stdev=41.59 lat (msec): min=5, max=842, avg=39.40, stdev=41.59 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 16], | 30.00th=[ 20], 40.00th=[ 24], 50.00th=[ 29], 60.00th=[ 35], | 70.00th=[ 42], 80.00th=[ 53], 90.00th=[ 80], 95.00th=[ 105], | 99.00th=[ 188], 99.50th=[ 249], 99.90th=[ 384], 99.95th=[ 844], | 99.99th=[ 844] bw ( KiB/s): min= 7, max= 87, per=28.70%, avg=24.39, stdev=15.60, samples=470 iops : min= 1, max= 21, avg= 5.46, stdev= 3.95, samples=470 write: IOPS=5, BW=22.7KiB/s (23.2kB/s)(6348KiB/279688msec); 0 zone resets clat (msec): min=38, max=608, avg=139.05, stdev=67.56 lat (msec): min=38, max=608, avg=139.05, stdev=67.56 clat percentiles (msec): | 1.00th=[ 52], 5.00th=[ 64], 10.00th=[ 74], 20.00th=[ 87], | 30.00th=[ 97], 40.00th=[ 110], 50.00th=[ 125], 60.00th=[ 138], | 70.00th=[ 155], 80.00th=[ 184], 90.00th=[ 228], 95.00th=[ 271], | 99.00th=[ 363], 99.50th=[ 447], 99.90th=[ 584], 99.95th=[ 609], | 99.99th=[ 609] bw ( KiB/s): min= 7, max= 56, per=25.16%, avg=22.40, stdev= 9.82, samples=545 iops : min= 1, max= 14, avg= 4.95, stdev= 2.50, samples=545 lat (msec) : 10=2.73%, 20=12.53%, 50=22.98%, 100=24.41%, 250=33.53% lat (msec) : 500=3.61%, 750=0.16%, 1000=0.03% cpu : usr=0.05%, sys=1.28%, ctx=5353, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1485,1587,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=143975: Thu Aug 27 11:59:07 2026 read: IOPS=5, BW=21.6KiB/s (22.2kB/s)(6028KiB/278494msec) clat (msec): min=5, max=534, avg=40.38, stdev=36.10 lat (msec): min=5, max=534, avg=40.39, stdev=36.10 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 21], 40.00th=[ 25], 50.00th=[ 30], 60.00th=[ 36], | 70.00th=[ 45], 80.00th=[ 56], 90.00th=[ 82], 95.00th=[ 105], | 99.00th=[ 161], 99.50th=[ 209], 99.90th=[ 376], 99.95th=[ 535], | 99.99th=[ 535] bw ( KiB/s): min= 7, max= 102, per=28.11%, avg=23.89, stdev=15.66, samples=486 iops : min= 1, max= 25, avg= 5.34, stdev= 3.94, samples=486 write: IOPS=5, BW=22.5KiB/s (23.0kB/s)(6260KiB/278494msec); 0 zone resets clat (msec): min=33, max=945, avg=138.73, stdev=69.54 lat (msec): min=33, max=945, avg=138.74, stdev=69.54 clat percentiles (msec): | 1.00th=[ 47], 5.00th=[ 63], 10.00th=[ 72], 20.00th=[ 87], | 30.00th=[ 97], 40.00th=[ 110], 50.00th=[ 124], 60.00th=[ 140], | 70.00th=[ 157], 80.00th=[ 184], 90.00th=[ 224], 95.00th=[ 266], | 99.00th=[ 388], 99.50th=[ 447], 99.90th=[ 642], 99.95th=[ 944], | 99.99th=[ 944] bw ( KiB/s): min= 7, max= 63, per=24.96%, avg=22.21, stdev=10.35, samples=541 iops : min= 1, max= 15, avg= 4.91, stdev= 2.64, samples=541 lat (msec) : 10=1.95%, 20=11.75%, 50=24.06%, 100=24.77%, 250=34.05% lat (msec) : 500=3.29%, 750=0.10%, 1000=0.03% cpu : usr=0.05%, sys=1.31%, ctx=5397, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=143977: Thu Aug 27 11:59:07 2026 read: IOPS=5, BW=21.9KiB/s (22.4kB/s)(6052KiB/276272msec) clat (msec): min=5, max=531, avg=39.77, stdev=37.40 lat (msec): min=5, max=531, avg=39.78, stdev=37.40 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 20], 40.00th=[ 24], 50.00th=[ 29], 60.00th=[ 35], | 70.00th=[ 43], 80.00th=[ 54], 90.00th=[ 80], 95.00th=[ 110], | 99.00th=[ 180], 99.50th=[ 218], 99.90th=[ 393], 99.95th=[ 531], | 99.99th=[ 531] bw ( KiB/s): min= 7, max= 79, per=28.45%, avg=24.19, stdev=15.90, samples=482 iops : min= 1, max= 19, avg= 5.41, stdev= 4.01, samples=482 write: IOPS=5, BW=22.6KiB/s (23.1kB/s)(6236KiB/276272msec); 0 zone resets clat (msec): min=35, max=1073, avg=138.28, stdev=72.25 lat (msec): min=35, max=1073, avg=138.29, stdev=72.25 clat percentiles (msec): | 1.00th=[ 48], 5.00th=[ 62], 10.00th=[ 71], 20.00th=[ 87], | 30.00th=[ 97], 40.00th=[ 108], 50.00th=[ 123], 60.00th=[ 138], | 70.00th=[ 157], 80.00th=[ 182], 90.00th=[ 226], 95.00th=[ 266], | 99.00th=[ 372], 99.50th=[ 451], 99.90th=[ 659], 99.95th=[ 1083], | 99.99th=[ 1083] bw ( KiB/s): min= 7, max= 64, per=25.11%, avg=22.35, stdev=10.28, samples=536 iops : min= 1, max= 16, avg= 4.94, stdev= 2.63, samples=536 lat (msec) : 10=2.18%, 20=13.02%, 50=23.54%, 100=23.89%, 250=33.98% lat (msec) : 500=3.16%, 750=0.20%, 2000=0.03% cpu : usr=0.05%, sys=1.33%, ctx=5426, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1513,1559,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=85.9KiB/s (87.9kB/s), 21.2KiB/s-21.9KiB/s (21.7kB/s-22.4kB/s), io=23.4MiB (24.6MB), run=276272-279688msec WRITE: bw=89.9KiB/s (92.0kB/s), 22.5KiB/s-22.7KiB/s (23.0kB/s-23.2kB/s), io=24.6MiB (25.7MB), run=276272-279688msec mix direct rw 16384 by fio with 4 jobs... mix buffer rw 16384 by fio with 4 jobs... rand-rw: (g=0): rw=randrw, bs=(R) 16.0KiB-16.0KiB, (W) 16.0KiB-16.0KiB, (T) 16.0KiB-16.0KiB, ioengine=psync, iodepth=16 ... fio-3.19 Starting 4 processes rand-rw: (g=0): rw=randrw, bs=(R) 16.0KiB-16.0KiB, (W) 16.0KiB-16.0KiB, (T) 16.0KiB-16.0KiB, ioengine=psync, iodepth=16 ... fio-3.19 Starting 4 processes rand-rw: (groupid=0, jobs=1): err= 0: pid=144052: Thu Aug 27 11:59:52 2026 read: IOPS=10, BW=162KiB/s (166kB/s)(5920KiB/36627msec) clat (usec): min=42, max=234602, avg=46005.48, stdev=39232.15 lat (usec): min=42, max=234604, avg=46013.94, stdev=39224.47 clat percentiles (usec): | 1.00th=[ 46], 5.00th=[ 62], 10.00th=[ 74], 20.00th=[ 92], | 30.00th=[ 22414], 40.00th=[ 33817], 50.00th=[ 43779], 60.00th=[ 51643], | 70.00th=[ 64226], 80.00th=[ 74974], 90.00th=[ 94897], 95.00th=[107480], | 99.00th=[173016], 99.50th=[206570], 99.90th=[233833], 99.95th=[233833], | 99.99th=[233833] bw ( KiB/s): min= 31, max= 413, per=25.08%, avg=163.77, stdev=81.72, samples=71 iops : min= 1, max= 25, avg= 9.48, stdev= 5.17, samples=71 write: IOPS=10, BW=174KiB/s (178kB/s)(6368KiB/36627msec); 0 zone resets clat (usec): min=1420, max=431672, avg=49018.71, stdev=57862.85 lat (usec): min=1423, max=431675, avg=49021.68, stdev=57862.81 clat percentiles (usec): | 1.00th=[ 1631], 5.00th=[ 1926], 10.00th=[ 2212], 20.00th=[ 6194], | 30.00th=[ 11207], 40.00th=[ 17433], 50.00th=[ 31327], 60.00th=[ 45351], | 70.00th=[ 61080], 80.00th=[ 80217], 90.00th=[113771], 95.00th=[149947], | 99.00th=[295699], 99.50th=[362808], 99.90th=[429917], 99.95th=[429917], | 99.99th=[429917] bw ( KiB/s): min= 31, max= 505, per=25.19%, avg=173.28, stdev=91.54, samples=72 iops : min= 1, max= 31, avg=10.08, stdev= 5.79, samples=72 lat (usec) : 50=1.30%, 100=8.46%, 250=1.17%, 500=0.65%, 750=0.26% lat (msec) : 2=4.04%, 4=4.30%, 10=6.25%, 20=9.64%, 50=24.35% lat (msec) : 100=28.65%, 250=10.03%, 500=0.91% cpu : usr=0.09%, sys=5.27%, ctx=1355, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144053: Thu Aug 27 11:59:53 2026 read: IOPS=10, BW=160KiB/s (164kB/s)(5744KiB/35877msec) clat (usec): min=40, max=300127, avg=53480.45, stdev=43362.02 lat (usec): min=40, max=300128, avg=53488.65, stdev=43364.82 clat percentiles (usec): | 1.00th=[ 51], 5.00th=[ 68], 10.00th=[ 79], 20.00th=[ 2704], | 30.00th=[ 28705], 40.00th=[ 39584], 50.00th=[ 50594], 60.00th=[ 58983], | 70.00th=[ 70779], 80.00th=[ 85459], 90.00th=[110625], 95.00th=[124257], | 99.00th=[177210], 99.50th=[221250], 99.90th=[299893], 99.95th=[299893], | 99.99th=[299893] bw ( KiB/s): min= 30, max= 285, per=24.63%, avg=160.84, stdev=65.93, samples=69 iops : min= 1, max= 17, avg= 9.29, stdev= 4.13, samples=69 write: IOPS=11, BW=182KiB/s (187kB/s)(6544KiB/35877msec); 0 zone resets clat (usec): min=1611, max=267699, avg=40568.98, stdev=44441.70 lat (usec): min=1613, max=267703, avg=40571.91, stdev=44441.67 clat percentiles (usec): | 1.00th=[ 1696], 5.00th=[ 1942], 10.00th=[ 2376], 20.00th=[ 6783], | 30.00th=[ 9896], 40.00th=[ 15401], 50.00th=[ 23462], 60.00th=[ 31851], | 70.00th=[ 51119], 80.00th=[ 69731], 90.00th=[104334], 95.00th=[130548], | 99.00th=[173016], 99.50th=[214959], 99.90th=[267387], 99.95th=[267387], | 99.99th=[267387] bw ( KiB/s): min= 31, max= 445, per=26.27%, avg=180.77, stdev=77.96, samples=70 iops : min= 1, max= 27, avg=10.56, stdev= 4.91, samples=70 lat (usec) : 50=0.39%, 100=7.42%, 250=0.65%, 500=0.39%, 750=0.13% lat (usec) : 1000=0.13% lat (msec) : 2=3.65%, 4=3.78%, 10=9.51%, 20=9.38%, 50=25.00% lat (msec) : 100=27.60%, 250=11.59%, 500=0.39% cpu : usr=0.09%, sys=5.75%, ctx=1435, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=359,409,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144054: Thu Aug 27 11:59:53 2026 read: IOPS=10, BW=176KiB/s (180kB/s)(6256KiB/35561msec) clat (usec): min=35, max=263483, avg=47085.44, stdev=43883.07 lat (usec): min=35, max=263485, avg=47099.09, stdev=43872.12 clat percentiles (usec): | 1.00th=[ 40], 5.00th=[ 57], 10.00th=[ 70], 20.00th=[ 88], | 30.00th=[ 21365], 40.00th=[ 34341], 50.00th=[ 42730], 60.00th=[ 51643], | 70.00th=[ 61604], 80.00th=[ 78119], 90.00th=[103285], 95.00th=[131597], | 99.00th=[187696], 99.50th=[233833], 99.90th=[263193], 99.95th=[263193], | 99.99th=[263193] bw ( KiB/s): min= 31, max= 380, per=27.12%, avg=177.10, stdev=77.43, samples=69 iops : min= 1, max= 23, avg=10.32, stdev= 4.86, samples=69 write: IOPS=10, BW=170KiB/s (174kB/s)(6032KiB/35561msec); 0 zone resets clat (usec): min=1504, max=237862, avg=45258.73, stdev=48304.49 lat (usec): min=1506, max=237869, avg=45261.97, stdev=48304.56 clat percentiles (usec): | 1.00th=[ 1614], 5.00th=[ 1958], 10.00th=[ 2507], 20.00th=[ 7177], | 30.00th=[ 10814], 40.00th=[ 17171], 50.00th=[ 26608], 60.00th=[ 42730], | 70.00th=[ 55837], 80.00th=[ 81265], 90.00th=[109577], 95.00th=[139461], | 99.00th=[217056], 99.50th=[225444], 99.90th=[238027], 99.95th=[238027], | 99.99th=[238027] bw ( KiB/s): min= 31, max= 351, per=24.47%, avg=168.38, stdev=67.45, samples=69 iops : min= 1, max= 21, avg= 9.75, stdev= 4.24, samples=69 lat (usec) : 50=2.21%, 100=10.03%, 250=0.91%, 500=0.26%, 750=0.26% lat (msec) : 2=2.60%, 4=4.43%, 10=7.29%, 20=8.33%, 50=25.39% lat (msec) : 100=26.17%, 250=11.98%, 500=0.13% cpu : usr=0.11%, sys=5.10%, ctx=1341, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144055: Thu Aug 27 11:59:53 2026 read: IOPS=10, BW=173KiB/s (178kB/s)(6032KiB/34780msec) clat (usec): min=39, max=283507, avg=47725.71, stdev=41960.65 lat (usec): min=39, max=283508, avg=47769.36, stdev=41958.29 clat percentiles (usec): | 1.00th=[ 42], 5.00th=[ 56], 10.00th=[ 68], 20.00th=[ 84], | 30.00th=[ 24249], 40.00th=[ 36963], 50.00th=[ 46924], 60.00th=[ 53216], | 70.00th=[ 65274], 80.00th=[ 78119], 90.00th=[ 99091], 95.00th=[114820], | 99.00th=[185598], 99.50th=[263193], 99.90th=[283116], 99.95th=[283116], | 99.99th=[283116] bw ( KiB/s): min= 63, max= 350, per=26.67%, avg=174.15, stdev=67.38, samples=67 iops : min= 3, max= 21, avg=10.13, stdev= 4.29, samples=67 write: IOPS=11, BW=180KiB/s (184kB/s)(6256KiB/34780msec); 0 zone resets clat (usec): min=1621, max=272187, avg=42694.41, stdev=46857.96 lat (usec): min=1623, max=272191, avg=42697.38, stdev=46857.72 clat percentiles (usec): | 1.00th=[ 1680], 5.00th=[ 1991], 10.00th=[ 3064], 20.00th=[ 5932], | 30.00th=[ 10290], 40.00th=[ 15533], 50.00th=[ 25035], 60.00th=[ 38536], | 70.00th=[ 55837], 80.00th=[ 72877], 90.00th=[104334], 95.00th=[137364], | 99.00th=[221250], 99.50th=[261096], 99.90th=[270533], 99.95th=[270533], | 99.99th=[270533] bw ( KiB/s): min= 31, max= 479, per=26.09%, avg=179.53, stdev=77.17, samples=68 iops : min= 1, max= 29, avg=10.47, stdev= 4.86, samples=68 lat (usec) : 50=2.21%, 100=9.11%, 250=1.17%, 500=0.52%, 750=0.13% lat (usec) : 1000=0.13% lat (msec) : 2=2.60%, 4=4.30%, 10=7.94%, 20=8.85%, 50=23.83% lat (msec) : 100=28.52%, 250=10.16%, 500=0.52% cpu : usr=0.11%, sys=5.34%, ctx=1385, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=654KiB/s (670kB/s), 160KiB/s-176KiB/s (164kB/s-180kB/s), io=23.4MiB (24.5MB), run=34780-36627msec WRITE: bw=688KiB/s (705kB/s), 170KiB/s-182KiB/s (174kB/s-187kB/s), io=24.6MiB (25.8MB), run=34780-36627msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144047: Thu Aug 27 12:00:42 2026 read: IOPS=4, BW=67.7KiB/s (69.3kB/s)(5920KiB/87472msec) clat (msec): min=8, max=335, avg=50.42, stdev=47.94 lat (msec): min=8, max=335, avg=50.42, stdev=47.94 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 13], 10.00th=[ 16], 20.00th=[ 22], | 30.00th=[ 26], 40.00th=[ 29], 50.00th=[ 32], 60.00th=[ 37], | 70.00th=[ 50], 80.00th=[ 73], 90.00th=[ 109], 95.00th=[ 153], | 99.00th=[ 236], 99.50th=[ 317], 99.90th=[ 338], 99.95th=[ 338], | 99.99th=[ 338] bw ( KiB/s): min= 29, max= 317, per=28.84%, avg=78.73, stdev=49.77, samples=147 iops : min= 1, max= 19, avg= 4.11, stdev= 3.14, samples=147 write: IOPS=4, BW=72.8KiB/s (74.5kB/s)(6368KiB/87472msec); 0 zone resets clat (msec): min=50, max=494, avg=172.57, stdev=74.97 lat (msec): min=50, max=494, avg=172.57, stdev=74.97 clat percentiles (msec): | 1.00th=[ 63], 5.00th=[ 85], 10.00th=[ 95], 20.00th=[ 114], | 30.00th=[ 128], 40.00th=[ 140], 50.00th=[ 157], 60.00th=[ 174], | 70.00th=[ 199], 80.00th=[ 220], 90.00th=[ 259], 95.00th=[ 321], | 99.00th=[ 443], 99.50th=[ 481], 99.90th=[ 493], 99.95th=[ 493], | 99.99th=[ 493] bw ( KiB/s): min= 29, max= 160, per=25.61%, avg=73.75, stdev=31.99, samples=169 iops : min= 1, max= 10, avg= 3.78, stdev= 2.08, samples=169 lat (msec) : 10=0.91%, 20=7.42%, 50=25.65%, 100=15.36%, 250=44.14% lat (msec) : 500=6.51% cpu : usr=0.05%, sys=1.13%, ctx=1363, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144048: Thu Aug 27 12:00:42 2026 read: IOPS=4, BW=65.7KiB/s (67.3kB/s)(5744KiB/87363msec) clat (msec): min=8, max=518, avg=46.27, stdev=47.22 lat (msec): min=8, max=518, avg=46.28, stdev=47.22 clat percentiles (msec): | 1.00th=[ 11], 5.00th=[ 14], 10.00th=[ 16], 20.00th=[ 21], | 30.00th=[ 24], 40.00th=[ 28], 50.00th=[ 33], 60.00th=[ 38], | 70.00th=[ 46], 80.00th=[ 63], 90.00th=[ 90], 95.00th=[ 128], | 99.00th=[ 224], 99.50th=[ 376], 99.90th=[ 518], 99.95th=[ 518], | 99.99th=[ 518] bw ( KiB/s): min= 21, max= 253, per=30.06%, avg=82.06, stdev=51.41, samples=136 iops : min= 1, max= 15, avg= 4.30, stdev= 3.29, samples=136 write: IOPS=4, BW=74.9KiB/s (76.7kB/s)(6544KiB/87363msec); 0 zone resets clat (msec): min=49, max=533, avg=172.48, stdev=82.59 lat (msec): min=49, max=533, avg=172.49, stdev=82.59 clat percentiles (msec): | 1.00th=[ 62], 5.00th=[ 84], 10.00th=[ 94], 20.00th=[ 110], | 30.00th=[ 122], 40.00th=[ 138], 50.00th=[ 153], 60.00th=[ 171], | 70.00th=[ 192], 80.00th=[ 224], 90.00th=[ 271], 95.00th=[ 342], | 99.00th=[ 477], 99.50th=[ 493], 99.90th=[ 535], 99.95th=[ 535], | 99.99th=[ 535] bw ( KiB/s): min= 29, max= 160, per=26.64%, avg=76.72, stdev=33.17, samples=166 iops : min= 1, max= 10, avg= 3.98, stdev= 2.17, samples=166 lat (msec) : 10=0.52%, 20=8.59%, 50=25.91%, 100=14.97%, 250=42.19% lat (msec) : 500=7.42%, 750=0.39% cpu : usr=0.04%, sys=1.09%, ctx=1243, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=359,409,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144049: Thu Aug 27 12:00:42 2026 read: IOPS=4, BW=74.6KiB/s (76.4kB/s)(6256KiB/83812msec) clat (msec): min=6, max=339, avg=48.59, stdev=45.00 lat (msec): min=6, max=339, avg=48.60, stdev=45.03 clat percentiles (msec): | 1.00th=[ 11], 5.00th=[ 14], 10.00th=[ 16], 20.00th=[ 21], | 30.00th=[ 24], 40.00th=[ 28], 50.00th=[ 33], 60.00th=[ 40], | 70.00th=[ 50], 80.00th=[ 68], 90.00th=[ 99], 95.00th=[ 138], | 99.00th=[ 253], 99.50th=[ 284], 99.90th=[ 342], 99.95th=[ 342], | 99.99th=[ 342] bw ( KiB/s): min= 29, max= 287, per=31.41%, avg=85.76, stdev=60.12, samples=143 iops : min= 1, max= 17, avg= 4.54, stdev= 3.78, samples=143 write: IOPS=4, BW=71.0KiB/s (73.7kB/s)(6032KiB/83812msec); 0 zone resets clat (msec): min=48, max=511, avg=171.06, stdev=79.88 lat (msec): min=48, max=511, avg=171.06, stdev=79.88 clat percentiles (msec): | 1.00th=[ 61], 5.00th=[ 78], 10.00th=[ 90], 20.00th=[ 110], | 30.00th=[ 123], 40.00th=[ 138], 50.00th=[ 153], 60.00th=[ 174], | 70.00th=[ 192], 80.00th=[ 224], 90.00th=[ 279], 95.00th=[ 326], | 99.00th=[ 477], 99.50th=[ 502], 99.90th=[ 510], 99.95th=[ 510], | 99.99th=[ 510] bw ( KiB/s): min= 28, max= 224, per=25.50%, avg=73.43, stdev=32.90, samples=159 iops : min= 1, max= 14, avg= 3.75, stdev= 2.16, samples=159 lat (msec) : 10=0.26%, 20=9.11%, 50=26.56%, 100=17.58%, 250=38.41% lat (msec) : 500=7.68%, 750=0.39% cpu : usr=0.05%, sys=1.16%, ctx=1354, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144050: Thu Aug 27 12:00:42 2026 read: IOPS=4, BW=69.7KiB/s (71.3kB/s)(6032KiB/86574msec) clat (msec): min=8, max=418, avg=49.76, stdev=51.21 lat (msec): min=8, max=418, avg=49.76, stdev=51.21 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 14], 10.00th=[ 16], 20.00th=[ 20], | 30.00th=[ 24], 40.00th=[ 29], 50.00th=[ 33], 60.00th=[ 39], | 70.00th=[ 47], 80.00th=[ 63], 90.00th=[ 106], 95.00th=[ 148], | 99.00th=[ 259], 99.50th=[ 363], 99.90th=[ 418], 99.95th=[ 418], | 99.99th=[ 418] bw ( KiB/s): min= 29, max= 255, per=30.52%, avg=83.31, stdev=52.23, samples=141 iops : min= 1, max= 15, avg= 4.39, stdev= 3.27, samples=141 write: IOPS=4, BW=72.3KiB/s (73.0kB/s)(6256KiB/86574msec); 0 zone resets clat (msec): min=55, max=660, avg=172.70, stdev=76.96 lat (msec): min=56, max=660, avg=172.72, stdev=76.96 clat percentiles (msec): | 1.00th=[ 61], 5.00th=[ 77], 10.00th=[ 91], 20.00th=[ 112], | 30.00th=[ 126], 40.00th=[ 140], 50.00th=[ 157], 60.00th=[ 178], | 70.00th=[ 201], 80.00th=[ 228], 90.00th=[ 275], 95.00th=[ 321], | 99.00th=[ 397], 99.50th=[ 472], 99.90th=[ 659], 99.95th=[ 659], | 99.99th=[ 659] bw ( KiB/s): min= 29, max= 160, per=25.58%, avg=73.66, stdev=33.19, samples=166 iops : min= 1, max= 10, avg= 3.78, stdev= 2.15, samples=166 lat (msec) : 10=1.04%, 20=10.16%, 50=24.48%, 100=14.45%, 250=42.58% lat (msec) : 500=7.16%, 750=0.13% cpu : usr=0.05%, sys=1.14%, ctx=1322, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=274KiB/s (280kB/s), 65.7KiB/s-74.6KiB/s (67.3kB/s-76.4kB/s), io=23.4MiB (24.5MB), run=83812-87472msec WRITE: bw=288KiB/s (295kB/s), 71.0KiB/s-74.9KiB/s (73.7kB/s-76.7kB/s), io=24.6MiB (25.8MB), run=83812-87472msec mix direct rw 1048576 by fio with 4 jobs... mix buffer rw 1048576 by fio with 4 jobs... rand-rw: (g=0): rw=randrw, bs=(R) 1024KiB-1024KiB, (W) 1024KiB-1024KiB, (T) 1024KiB-1024KiB, ioengine=psync, iodepth=16 ... fio-3.19 Starting 4 processes rand-rw: (g=0): rw=randrw, bs=(R) 1024KiB-1024KiB, (W) 1024KiB-1024KiB, (T) 1024KiB-1024KiB, ioengine=psync, iodepth=16 ... fio-3.19 Starting 4 processes rand-rw: (groupid=0, jobs=1): err= 0: pid=144074: Thu Aug 27 12:01:07 2026 read: IOPS=0, BW=784KiB/s (803kB/s)(7168KiB/9146msec) clat (usec): min=808, max=4074.2k, avg=876437.39, stdev=1437662.12 lat (usec): min=811, max=4074.2k, avg=876439.50, stdev=1437661.76 clat percentiles (usec): | 1.00th=[ 807], 5.00th=[ 807], 10.00th=[ 807], | 20.00th=[ 143655], 30.00th=[ 223347], 40.00th=[ 223347], | 50.00th=[ 246416], 60.00th=[ 683672], 70.00th=[ 683672], | 80.00th=[ 759170], 90.00th=[4076864], 95.00th=[4076864], | 99.00th=[4076864], 99.50th=[4076864], 99.90th=[4076864], | 99.95th=[4076864], 99.99th=[4076864] bw ( KiB/s): min= 1492, max= 4071, per=100.00%, avg=2269.60, stdev=1024.89, samples=5 iops : min= 1, max= 3, avg= 1.40, stdev= 0.89, samples=5 write: IOPS=0, BW=560KiB/s (573kB/s)(5120KiB/9146msec); 0 zone resets clat (msec): min=318, max=1155, avg=589.78, stdev=333.94 lat (msec): min=318, max=1155, avg=589.94, stdev=333.88 clat percentiles (msec): | 1.00th=[ 317], 5.00th=[ 317], 10.00th=[ 317], 20.00th=[ 317], | 30.00th=[ 388], 40.00th=[ 388], 50.00th=[ 481], 60.00th=[ 481], | 70.00th=[ 609], 80.00th=[ 609], 90.00th=[ 1150], 95.00th=[ 1150], | 99.00th=[ 1150], 99.50th=[ 1150], 99.90th=[ 1150], 99.95th=[ 1150], | 99.99th=[ 1150] bw ( KiB/s): min= 1939, max= 2023, per=74.73%, avg=1968.50, stdev=38.69, samples=4 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=4 lat (usec) : 1000=8.33% lat (msec) : 250=25.00%, 500=25.00%, 750=16.67%, 1000=8.33%, 2000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=5.82%, ctx=535, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=7,5,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144075: Thu Aug 27 12:01:07 2026 read: IOPS=0, BW=188KiB/s (193kB/s)(2048KiB/10883msec) clat (msec): min=6, max=4914, avg=2460.83, stdev=3470.27 lat (msec): min=6, max=4914, avg=2460.83, stdev=3470.27 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 7], 10.00th=[ 7], 20.00th=[ 7], | 30.00th=[ 7], 40.00th=[ 7], 50.00th=[ 7], 60.00th=[ 4933], | 70.00th=[ 4933], 80.00th=[ 4933], 90.00th=[ 4933], 95.00th=[ 4933], | 99.00th=[ 4933], 99.50th=[ 4933], 99.90th=[ 4933], 99.95th=[ 4933], | 99.99th=[ 4933] bw ( KiB/s): min= 2023, max= 2023, per=100.00%, avg=2023.00, stdev= 0.00, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=0, BW=941KiB/s (963kB/s)(10.0MiB/10883msec); 0 zone resets clat (msec): min=280, max=1060, avg=577.68, stdev=304.86 lat (msec): min=281, max=1060, avg=577.81, stdev=304.84 clat percentiles (msec): | 1.00th=[ 279], 5.00th=[ 279], 10.00th=[ 279], 20.00th=[ 309], | 30.00th=[ 342], 40.00th=[ 368], 50.00th=[ 380], 60.00th=[ 439], | 70.00th=[ 726], 80.00th=[ 885], 90.00th=[ 986], 95.00th=[ 1062], | 99.00th=[ 1062], 99.50th=[ 1062], 99.90th=[ 1062], 99.95th=[ 1062], | 99.99th=[ 1062] bw ( KiB/s): min= 1851, max= 4063, per=86.15%, avg=2269.14, stdev=793.46, samples=7 iops : min= 1, max= 3, avg= 1.43, stdev= 0.79, samples=7 lat (msec) : 10=8.33%, 500=50.00%, 750=8.33%, 1000=16.67%, 2000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=6.18%, ctx=600, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=2,10,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144076: Thu Aug 27 12:01:07 2026 read: IOPS=0, BW=630KiB/s (645kB/s)(6144KiB/9753msec) clat (usec): min=512, max=523215, avg=226337.98, stdev=220180.32 lat (usec): min=514, max=523216, avg=226339.65, stdev=220180.20 clat percentiles (usec): | 1.00th=[ 515], 5.00th=[ 515], 10.00th=[ 515], 20.00th=[ 1565], | 30.00th=[ 1565], 40.00th=[162530], 50.00th=[162530], 60.00th=[223347], | 70.00th=[446694], 80.00th=[446694], 90.00th=[522191], 95.00th=[522191], | 99.00th=[522191], 99.50th=[522191], 99.90th=[522191], 99.95th=[522191], | 99.99th=[522191] bw ( KiB/s): min= 1851, max= 3878, per=100.00%, avg=2407.25, stdev=981.63, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 write: IOPS=0, BW=630KiB/s (645kB/s)(6144KiB/9753msec); 0 zone resets clat (msec): min=261, max=5422, avg=1366.35, stdev=2006.00 lat (msec): min=261, max=5422, avg=1366.44, stdev=2006.01 clat percentiles (msec): | 1.00th=[ 262], 5.00th=[ 262], 10.00th=[ 262], 20.00th=[ 372], | 30.00th=[ 372], 40.00th=[ 456], 50.00th=[ 456], 60.00th=[ 642], | 70.00th=[ 1045], 80.00th=[ 1045], 90.00th=[ 5403], 95.00th=[ 5403], | 99.00th=[ 5403], 99.50th=[ 5403], 99.90th=[ 5403], 99.95th=[ 5403], | 99.99th=[ 5403] bw ( KiB/s): min= 1851, max= 2031, per=74.65%, avg=1966.20, stdev=72.09, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 lat (usec) : 750=8.33% lat (msec) : 2=8.33%, 250=16.67%, 500=33.33%, 750=16.67%, 2000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=4.27%, ctx=132, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=6,6,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144078: Thu Aug 27 12:01:07 2026 read: IOPS=0, BW=549KiB/s (562kB/s)(5120KiB/9322msec) clat (usec): min=808, max=418957, avg=199416.39, stdev=198300.61 lat (usec): min=810, max=418959, avg=199588.24, stdev=198089.15 clat percentiles (usec): | 1.00th=[ 807], 5.00th=[ 807], 10.00th=[ 807], 20.00th=[ 807], | 30.00th=[ 1680], 40.00th=[ 1680], 50.00th=[202376], 60.00th=[202376], | 70.00th=[375391], 80.00th=[375391], 90.00th=[417334], 95.00th=[417334], | 99.00th=[417334], 99.50th=[417334], 99.90th=[417334], 99.95th=[417334], | 99.99th=[417334] bw ( KiB/s): min= 3886, max= 4047, per=100.00%, avg=3966.50, stdev=113.84, samples=2 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=2 write: IOPS=0, BW=769KiB/s (787kB/s)(7168KiB/9322msec); 0 zone resets clat (msec): min=294, max=4210, avg=1165.13, stdev=1399.47 lat (msec): min=294, max=4211, avg=1165.92, stdev=1399.39 clat percentiles (msec): | 1.00th=[ 296], 5.00th=[ 296], 10.00th=[ 296], 20.00th=[ 321], | 30.00th=[ 523], 40.00th=[ 523], 50.00th=[ 542], 60.00th=[ 818], | 70.00th=[ 818], 80.00th=[ 1452], 90.00th=[ 4212], 95.00th=[ 4212], | 99.00th=[ 4212], 99.50th=[ 4212], 99.90th=[ 4212], 99.95th=[ 4212], | 99.99th=[ 4212] bw ( KiB/s): min= 1501, max= 2035, per=72.68%, avg=1914.33, stdev=206.52, samples=6 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=6 lat (usec) : 1000=8.33% lat (msec) : 2=8.33%, 250=8.33%, 500=33.33%, 750=16.67%, 1000=8.33% lat (msec) : 2000=8.33%, >=2000=8.33% cpu : usr=0.04%, sys=4.52%, ctx=115, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=5,7,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=1882KiB/s (1927kB/s), 188KiB/s-784KiB/s (193kB/s-803kB/s), io=20.0MiB (20.0MB), run=9146-10883msec WRITE: bw=2635KiB/s (2698kB/s), 560KiB/s-941KiB/s (573kB/s-963kB/s), io=28.0MiB (29.4MB), run=9146-10883msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144079: Thu Aug 27 12:01:07 2026 read: IOPS=0, BW=687KiB/s (703kB/s)(7168KiB/10440msec) clat (msec): min=89, max=4078, avg=1007.23, stdev=1438.00 lat (msec): min=89, max=4078, avg=1007.23, stdev=1438.00 clat percentiles (msec): | 1.00th=[ 90], 5.00th=[ 90], 10.00th=[ 90], 20.00th=[ 146], | 30.00th=[ 264], 40.00th=[ 264], 50.00th=[ 456], 60.00th=[ 493], | 70.00th=[ 493], 80.00th=[ 1519], 90.00th=[ 4077], 95.00th=[ 4077], | 99.00th=[ 4077], 99.50th=[ 4077], 99.90th=[ 4077], 99.95th=[ 4077], | 99.99th=[ 4077] bw ( KiB/s): min= 1822, max= 3886, per=100.00%, avg=2352.40, stdev=861.70, samples=5 iops : min= 1, max= 3, avg= 1.40, stdev= 0.89, samples=5 write: IOPS=0, BW=490KiB/s (502kB/s)(5120KiB/10440msec); 0 zone resets clat (msec): min=285, max=1515, avg=631.22, stdev=534.73 lat (msec): min=285, max=1515, avg=631.35, stdev=534.72 clat percentiles (msec): | 1.00th=[ 288], 5.00th=[ 288], 10.00th=[ 288], 20.00th=[ 288], | 30.00th=[ 292], 40.00th=[ 292], 50.00th=[ 300], 60.00th=[ 300], | 70.00th=[ 768], 80.00th=[ 768], 90.00th=[ 1519], 95.00th=[ 1519], | 99.00th=[ 1519], 99.50th=[ 1519], 99.90th=[ 1519], 99.95th=[ 1519], | 99.99th=[ 1519] bw ( KiB/s): min= 1481, max= 3938, per=96.86%, avg=2469.00, stdev=1297.20, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 lat (msec) : 100=8.33%, 250=8.33%, 500=50.00%, 1000=8.33%, 2000=16.67% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=1.12%, ctx=61, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=7,5,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144080: Thu Aug 27 12:01:07 2026 read: IOPS=0, BW=183KiB/s (188kB/s)(2048KiB/11166msec) clat (msec): min=81, max=4744, avg=2412.82, stdev=3297.44 lat (msec): min=81, max=4744, avg=2412.82, stdev=3297.44 clat percentiles (msec): | 1.00th=[ 82], 5.00th=[ 82], 10.00th=[ 82], 20.00th=[ 82], | 30.00th=[ 82], 40.00th=[ 82], 50.00th=[ 82], 60.00th=[ 4732], | 70.00th=[ 4732], 80.00th=[ 4732], 90.00th=[ 4732], 95.00th=[ 4732], | 99.00th=[ 4732], 99.50th=[ 4732], 99.90th=[ 4732], 99.95th=[ 4732], | 99.99th=[ 4732] bw ( KiB/s): min= 1965, max= 2039, per=100.00%, avg=2002.00, stdev=52.33, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=0, BW=917KiB/s (939kB/s)(10.0MiB/11166msec); 0 zone resets clat (msec): min=222, max=1008, avg=598.43, stdev=267.30 lat (msec): min=222, max=1008, avg=598.55, stdev=267.33 clat percentiles (msec): | 1.00th=[ 222], 5.00th=[ 222], 10.00th=[ 222], 20.00th=[ 266], | 30.00th=[ 443], 40.00th=[ 535], 50.00th=[ 542], 60.00th=[ 584], | 70.00th=[ 584], 80.00th=[ 818], 90.00th=[ 978], 95.00th=[ 1011], | 99.00th=[ 1011], 99.50th=[ 1011], 99.90th=[ 1011], 99.95th=[ 1011], | 99.99th=[ 1011] bw ( KiB/s): min= 1822, max= 4096, per=87.78%, avg=2237.50, stdev=754.36, samples=8 iops : min= 1, max= 4, avg= 1.38, stdev= 1.06, samples=8 lat (msec) : 100=8.33%, 250=8.33%, 500=16.67%, 750=33.33%, 1000=16.67% lat (msec) : 2000=8.33%, >=2000=8.33% cpu : usr=0.04%, sys=1.78%, ctx=99, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=2,10,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144081: Thu Aug 27 12:01:07 2026 read: IOPS=0, BW=546KiB/s (559kB/s)(6144KiB/11245msec) clat (msec): min=123, max=299, avg=197.16, stdev=76.92 lat (msec): min=123, max=299, avg=197.16, stdev=76.92 clat percentiles (msec): | 1.00th=[ 124], 5.00th=[ 124], 10.00th=[ 124], 20.00th=[ 132], | 30.00th=[ 132], 40.00th=[ 150], 50.00th=[ 150], 60.00th=[ 199], | 70.00th=[ 284], 80.00th=[ 284], 90.00th=[ 300], 95.00th=[ 300], | 99.00th=[ 300], 99.50th=[ 300], 99.90th=[ 300], 99.95th=[ 300], | 99.99th=[ 300] bw ( KiB/s): min= 1988, max= 2963, per=100.00%, avg=2259.50, stdev=469.74, samples=4 iops : min= 1, max= 2, avg= 1.50, stdev= 0.58, samples=4 write: IOPS=0, BW=546KiB/s (559kB/s)(6144KiB/11245msec); 0 zone resets clat (msec): min=236, max=5768, avg=1593.71, stdev=2107.48 lat (msec): min=236, max=5768, avg=1593.83, stdev=2107.48 clat percentiles (msec): | 1.00th=[ 236], 5.00th=[ 236], 10.00th=[ 236], 20.00th=[ 485], | 30.00th=[ 485], 40.00th=[ 634], 50.00th=[ 634], 60.00th=[ 718], | 70.00th=[ 1720], 80.00th=[ 1720], 90.00th=[ 5738], 95.00th=[ 5738], | 99.00th=[ 5738], 99.50th=[ 5738], 99.90th=[ 5738], 99.95th=[ 5738], | 99.99th=[ 5738] bw ( KiB/s): min= 1481, max= 3644, per=89.85%, avg=2290.25, stdev=937.65, samples=4 iops : min= 1, max= 3, avg= 1.75, stdev= 0.96, samples=4 lat (msec) : 250=41.67%, 500=25.00%, 750=16.67%, 2000=8.33%, >=2000=8.33% cpu : usr=0.01%, sys=2.05%, ctx=127, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=6,6,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144082: Thu Aug 27 12:01:07 2026 read: IOPS=0, BW=474KiB/s (486kB/s)(5120KiB/10798msec) clat (msec): min=77, max=845, avg=316.13, stdev=303.40 lat (msec): min=77, max=845, avg=316.13, stdev=303.40 clat percentiles (msec): | 1.00th=[ 78], 5.00th=[ 78], 10.00th=[ 78], 20.00th=[ 78], | 30.00th=[ 180], 40.00th=[ 180], 50.00th=[ 222], 60.00th=[ 222], | 70.00th=[ 257], 80.00th=[ 257], 90.00th=[ 844], 95.00th=[ 844], | 99.00th=[ 844], 99.50th=[ 844], 99.90th=[ 844], 99.95th=[ 844], | 99.99th=[ 844] bw ( KiB/s): min= 3886, max= 3938, per=100.00%, avg=3912.00, stdev=36.77, samples=2 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=2 write: IOPS=0, BW=664KiB/s (680kB/s)(7168KiB/10798msec); 0 zone resets clat (msec): min=240, max=4080, avg=1277.82, stdev=1425.72 lat (msec): min=240, max=4083, avg=1278.39, stdev=1426.51 clat percentiles (msec): | 1.00th=[ 241], 5.00th=[ 241], 10.00th=[ 241], 20.00th=[ 418], | 30.00th=[ 456], 40.00th=[ 456], 50.00th=[ 676], 60.00th=[ 718], | 70.00th=[ 718], 80.00th=[ 2366], 90.00th=[ 4077], 95.00th=[ 4077], | 99.00th=[ 4077], 99.50th=[ 4077], 99.90th=[ 4077], 99.95th=[ 4077], | 99.99th=[ 4077] bw ( KiB/s): min= 1965, max= 2963, per=86.04%, avg=2193.20, stdev=431.20, samples=5 iops : min= 1, max= 2, avg= 1.20, stdev= 0.45, samples=5 lat (msec) : 100=8.33%, 250=25.00%, 500=25.00%, 750=16.67%, 1000=8.33% lat (msec) : >=2000=16.67% cpu : usr=0.00%, sys=2.10%, ctx=157, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=5,7,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=1821KiB/s (1865kB/s), 183KiB/s-687KiB/s (188kB/s-703kB/s), io=20.0MiB (20.0MB), run=10440-11245msec WRITE: bw=2550KiB/s (2611kB/s), 490KiB/s-917KiB/s (502kB/s-939kB/s), io=28.0MiB (29.4MB), run=10440-11245msec mix direct rw 4194304 by fio with 4 jobs... mix buffer rw 4194304 by fio with 4 jobs... rand-rw: (g=0): rw=randrw, bs=(R) 4096KiB-4096KiB, (W) 4096KiB-4096KiB, (T) 4096KiB-4096KiB, ioengine=psync, iodepth=16 ... fio-3.19 Starting 4 processes rand-rw: (g=0): rw=randrw, bs=(R) 4096KiB-4096KiB, (W) 4096KiB-4096KiB, (T) 4096KiB-4096KiB, ioengine=psync, iodepth=16 ... fio-3.19 Starting 4 processes rand-rw: (groupid=0, jobs=1): err= 0: pid=144103: Thu Aug 27 12:01:26 2026 read: IOPS=0, BW=3682KiB/s (3771kB/s)(12.0MiB/3337msec) clat (msec): min=962, max=1228, avg=1089.00, stdev=133.42 lat (msec): min=962, max=1228, avg=1089.00, stdev=133.42 clat percentiles (msec): | 1.00th=[ 961], 5.00th=[ 961], 10.00th=[ 961], 20.00th=[ 961], | 30.00th=[ 961], 40.00th=[ 1083], 50.00th=[ 1083], 60.00th=[ 1083], | 70.00th=[ 1234], 80.00th=[ 1234], 90.00th=[ 1234], 95.00th=[ 1234], | 99.00th=[ 1234], 99.50th=[ 1234], 99.90th=[ 1234], 99.95th=[ 1234], | 99.99th=[ 1234] bw ( KiB/s): min= 8015, max= 8047, per=100.00%, avg=8031.00, stdev=22.63, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 1000=33.33%, 2000=66.67% cpu : usr=0.00%, sys=11.60%, ctx=231, majf=0, minf=7 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=3,0,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144105: Thu Aug 27 12:01:26 2026 read: IOPS=0, BW=984KiB/s (1008kB/s)(4096KiB/4161msec) clat (nsec): min=951116k, max=951116k, avg=951116043.00, stdev= 0.00 lat (nsec): min=951120k, max=951120k, avg=951120255.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 953], 5.00th=[ 953], 10.00th=[ 953], 20.00th=[ 953], | 30.00th=[ 953], 40.00th=[ 953], 50.00th=[ 953], 60.00th=[ 953], | 70.00th=[ 953], 80.00th=[ 953], 90.00th=[ 953], 95.00th=[ 953], | 99.00th=[ 953], 99.50th=[ 953], 99.90th=[ 953], 99.95th=[ 953], | 99.99th=[ 953] bw ( KiB/s): min= 8015, max= 8015, per=100.00%, avg=8015.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=1969KiB/s (2016kB/s)(8192KiB/4161msec); 0 zone resets clat (msec): min=671, max=2365, avg=1518.45, stdev=1197.67 lat (msec): min=672, max=2365, avg=1519.08, stdev=1197.55 clat percentiles (msec): | 1.00th=[ 676], 5.00th=[ 676], 10.00th=[ 676], 20.00th=[ 676], | 30.00th=[ 676], 40.00th=[ 676], 50.00th=[ 676], 60.00th=[ 2366], | 70.00th=[ 2366], 80.00th=[ 2366], 90.00th=[ 2366], 95.00th=[ 2366], | 99.00th=[ 2366], 99.50th=[ 2366], 99.90th=[ 2366], 99.95th=[ 2366], | 99.99th=[ 2366] bw ( KiB/s): min= 8047, max= 8047, per=100.00%, avg=8047.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 750=33.33%, 1000=33.33%, >=2000=33.33% cpu : usr=0.02%, sys=3.41%, ctx=80, majf=0, minf=9 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1,2,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144107: Thu Aug 27 12:01:26 2026 write: IOPS=0, BW=3011KiB/s (3083kB/s)(12.0MiB/4081msec); 0 zone resets clat (msec): min=901, max=1940, avg=1299.48, stdev=560.79 lat (msec): min=905, max=1941, avg=1302.21, stdev=558.91 clat percentiles (msec): | 1.00th=[ 902], 5.00th=[ 902], 10.00th=[ 902], 20.00th=[ 902], | 30.00th=[ 902], 40.00th=[ 1053], 50.00th=[ 1053], 60.00th=[ 1053], | 70.00th=[ 1938], 80.00th=[ 1938], 90.00th=[ 1938], 95.00th=[ 1938], | 99.00th=[ 1938], 99.50th=[ 1938], 99.90th=[ 1938], 99.95th=[ 1938], | 99.99th=[ 1938] bw ( KiB/s): min= 7984, max= 8126, per=100.00%, avg=8055.00, stdev=100.41, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 1000=33.33%, 2000=66.67% cpu : usr=0.00%, sys=3.55%, ctx=59, majf=0, minf=7 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144109: Thu Aug 27 12:01:26 2026 write: IOPS=0, BW=2962KiB/s (3033kB/s)(12.0MiB/4148msec); 0 zone resets clat (msec): min=478, max=2558, avg=1359.36, stdev=1075.74 lat (msec): min=483, max=2558, avg=1361.70, stdev=1073.61 clat percentiles (msec): | 1.00th=[ 481], 5.00th=[ 481], 10.00th=[ 481], 20.00th=[ 481], | 30.00th=[ 481], 40.00th=[ 1045], 50.00th=[ 1045], 60.00th=[ 1045], | 70.00th=[ 2567], 80.00th=[ 2567], 90.00th=[ 2567], 95.00th=[ 2567], | 99.00th=[ 2567], 99.50th=[ 2567], 99.90th=[ 2567], 99.95th=[ 2567], | 99.99th=[ 2567] bw ( KiB/s): min= 8015, max= 8094, per=100.00%, avg=8054.50, stdev=55.86, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.05%, sys=2.56%, ctx=40, majf=0, minf=8 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=3938KiB/s (4032kB/s), 984KiB/s-3682KiB/s (1008kB/s-3771kB/s), io=16.0MiB (16.8MB), run=3337-4161msec WRITE: bw=7875KiB/s (8064kB/s), 1969KiB/s-3011KiB/s (2016kB/s-3083kB/s), io=32.0MiB (33.6MB), run=4081-4161msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144102: Thu Aug 27 12:01:26 2026 read: IOPS=0, BW=3659KiB/s (3747kB/s)(12.0MiB/3358msec) clat (msec): min=501, max=1643, avg=1092.66, stdev=572.00 lat (msec): min=501, max=1643, avg=1092.66, stdev=572.00 clat percentiles (msec): | 1.00th=[ 502], 5.00th=[ 502], 10.00th=[ 502], 20.00th=[ 502], | 30.00th=[ 502], 40.00th=[ 1133], 50.00th=[ 1133], 60.00th=[ 1133], | 70.00th=[ 1636], 80.00th=[ 1636], 90.00th=[ 1636], 95.00th=[ 1636], | 99.00th=[ 1636], 99.50th=[ 1636], 99.90th=[ 1636], 99.95th=[ 1636], | 99.99th=[ 1636] bw ( KiB/s): min= 8110, max= 8175, per=100.00%, avg=8142.50, stdev=45.96, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=33.33%, 2000=66.67% cpu : usr=0.00%, sys=2.98%, ctx=46, majf=0, minf=10 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=3,0,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144104: Thu Aug 27 12:01:26 2026 read: IOPS=0, BW=847KiB/s (867kB/s)(4096KiB/4836msec) clat (nsec): min=1607.5M, max=1607.5M, avg=1607501937.00, stdev= 0.00 lat (nsec): min=1607.5M, max=1607.5M, avg=1607504712.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1603], 5.00th=[ 1603], 10.00th=[ 1603], 20.00th=[ 1603], | 30.00th=[ 1603], 40.00th=[ 1603], 50.00th=[ 1603], 60.00th=[ 1603], | 70.00th=[ 1603], 80.00th=[ 1603], 90.00th=[ 1603], 95.00th=[ 1603], | 99.00th=[ 1603], 99.50th=[ 1603], 99.90th=[ 1603], 99.95th=[ 1603], | 99.99th=[ 1603] bw ( KiB/s): min= 8175, max= 8175, per=100.00%, avg=8175.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=1694KiB/s (1735kB/s)(8192KiB/4836msec); 0 zone resets clat (msec): min=1374, max=1665, avg=1519.62, stdev=205.62 lat (msec): min=1377, max=1668, avg=1522.99, stdev=205.32 clat percentiles (msec): | 1.00th=[ 1368], 5.00th=[ 1368], 10.00th=[ 1368], 20.00th=[ 1368], | 30.00th=[ 1368], 40.00th=[ 1368], 50.00th=[ 1368], 60.00th=[ 1670], | 70.00th=[ 1670], 80.00th=[ 1670], 90.00th=[ 1670], 95.00th=[ 1670], | 99.00th=[ 1670], 99.50th=[ 1670], 99.90th=[ 1670], 99.95th=[ 1670], | 99.99th=[ 1670] bw ( KiB/s): min= 8126, max= 8126, per=100.00%, avg=8126.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 2000=100.00% cpu : usr=0.00%, sys=2.42%, ctx=42, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1,2,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144106: Thu Aug 27 12:01:26 2026 write: IOPS=0, BW=2590KiB/s (2652kB/s)(12.0MiB/4744msec); 0 zone resets clat (msec): min=364, max=2865, avg=1520.62, stdev=1261.38 lat (msec): min=366, max=2867, avg=1522.71, stdev=1261.05 clat percentiles (msec): | 1.00th=[ 363], 5.00th=[ 363], 10.00th=[ 363], 20.00th=[ 363], | 30.00th=[ 363], 40.00th=[ 1334], 50.00th=[ 1334], 60.00th=[ 1334], | 70.00th=[ 2869], 80.00th=[ 2869], 90.00th=[ 2869], 95.00th=[ 2869], | 99.00th=[ 2869], 99.50th=[ 2869], 99.90th=[ 2869], 99.95th=[ 2869], | 99.99th=[ 2869] bw ( KiB/s): min= 8126, max= 8159, per=100.00%, avg=8142.50, stdev=23.33, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=2.85%, ctx=59, majf=0, minf=10 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144108: Thu Aug 27 12:01:26 2026 write: IOPS=1, BW=4256KiB/s (4358kB/s)(12.0MiB/2887msec); 0 zone resets clat (msec): min=424, max=1657, avg=924.88, stdev=648.43 lat (msec): min=424, max=1657, avg=927.69, stdev=647.25 clat percentiles (msec): | 1.00th=[ 426], 5.00th=[ 426], 10.00th=[ 426], 20.00th=[ 426], | 30.00th=[ 426], 40.00th=[ 693], 50.00th=[ 693], 60.00th=[ 693], | 70.00th=[ 1653], 80.00th=[ 1653], 90.00th=[ 1653], 95.00th=[ 1653], | 99.00th=[ 1653], 99.50th=[ 1653], 99.90th=[ 1653], 99.95th=[ 1653], | 99.99th=[ 1653] bw ( KiB/s): min=16318, max=16318, per=100.00%, avg=16318.00, stdev= 0.00, samples=1 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 750=33.33%, 2000=33.33% cpu : usr=0.03%, sys=4.82%, ctx=63, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=3388KiB/s (3469kB/s), 847KiB/s-3659KiB/s (867kB/s-3747kB/s), io=16.0MiB (16.8MB), run=3358-4836msec WRITE: bw=6776KiB/s (6938kB/s), 1694KiB/s-4256KiB/s (1735kB/s-4358kB/s), io=32.0MiB (33.6MB), run=2887-4836msec