== sanity test 398b: DIO and buffer IO race ============== 20:47:27 (1789606047) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 4.78378 s, 10.5 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=144532: Wed Sep 16 20:50:07 2026 read: IOPS=10, BW=42.9KiB/s (43.9kB/s)(5992KiB/139720msec) clat (usec): min=31, max=1268.2k, avg=47243.15, stdev=49122.71 lat (usec): min=31, max=1268.2k, avg=47250.08, stdev=49125.88 clat percentiles (usec): | 1.00th=[ 53], 5.00th=[ 66], 10.00th=[ 151], | 20.00th=[ 19792], 30.00th=[ 25560], 40.00th=[ 31851], | 50.00th=[ 39060], 60.00th=[ 47449], 70.00th=[ 56886], | 80.00th=[ 71828], 90.00th=[ 91751], 95.00th=[ 111674], | 99.00th=[ 160433], 99.50th=[ 217056], 99.90th=[ 492831], | 99.95th=[1266680], 99.99th=[1266680] bw ( KiB/s): min= 7, max= 103, per=24.85%, avg=42.49, stdev=19.01, samples=274 iops : min= 1, max= 25, avg= 9.95, stdev= 4.79, samples=274 write: IOPS=11, BW=45.1KiB/s (46.1kB/s)(6296KiB/139720msec); 0 zone resets clat (usec): min=944, max=579201, avg=43466.72, stdev=47452.94 lat (usec): min=946, max=579201, avg=43471.53, stdev=47454.50 clat percentiles (usec): | 1.00th=[ 1156], 5.00th=[ 1287], 10.00th=[ 1450], 20.00th=[ 4015], | 30.00th=[ 8291], 40.00th=[ 18220], 50.00th=[ 32113], 60.00th=[ 43779], | 70.00th=[ 57410], 80.00th=[ 74974], 90.00th=[105382], 95.00th=[130548], | 99.00th=[189793], 99.50th=[231736], 99.90th=[450888], 99.95th=[583009], | 99.99th=[583009] bw ( KiB/s): min= 7, max= 126, per=25.14%, avg=45.00, stdev=20.03, samples=272 iops : min= 1, max= 31, avg=10.59, stdev= 5.05, samples=272 lat (usec) : 50=0.36%, 100=4.10%, 250=0.65%, 500=0.16%, 750=0.10% lat (usec) : 1000=0.07% lat (msec) : 2=7.00%, 4=3.32%, 10=6.48%, 20=8.98%, 50=32.19% lat (msec) : 100=27.34%, 250=8.92%, 500=0.26%, 750=0.03%, 2000=0.03% cpu : usr=0.09%, sys=4.73%, ctx=6514, 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=144533: Wed Sep 16 20:50:07 2026 read: IOPS=10, BW=42.6KiB/s (43.6kB/s)(5940KiB/139497msec) clat (usec): min=35, max=1212.1k, avg=45100.39, stdev=47154.65 lat (usec): min=35, max=1212.1k, avg=45104.12, stdev=47153.99 clat percentiles (usec): | 1.00th=[ 57], 5.00th=[ 68], 10.00th=[ 143], | 20.00th=[ 20317], 30.00th=[ 26346], 40.00th=[ 31327], | 50.00th=[ 36963], 60.00th=[ 44827], 70.00th=[ 55313], | 80.00th=[ 67634], 90.00th=[ 85459], 95.00th=[ 104334], | 99.00th=[ 154141], 99.50th=[ 206570], 99.90th=[ 463471], | 99.95th=[1216349], 99.99th=[1216349] bw ( KiB/s): min= 5, max= 103, per=24.76%, avg=42.34, stdev=18.36, samples=272 iops : min= 1, max= 25, avg= 9.91, stdev= 4.62, samples=272 write: IOPS=11, BW=45.5KiB/s (46.6kB/s)(6348KiB/139497msec); 0 zone resets clat (usec): min=951, max=284683, avg=45363.52, stdev=46842.79 lat (usec): min=952, max=284684, avg=45367.63, stdev=46842.95 clat percentiles (usec): | 1.00th=[ 1156], 5.00th=[ 1319], 10.00th=[ 1598], 20.00th=[ 4359], | 30.00th=[ 8586], 40.00th=[ 19268], 50.00th=[ 33424], 60.00th=[ 46400], | 70.00th=[ 60031], 80.00th=[ 78119], 90.00th=[110625], 95.00th=[139461], | 99.00th=[200279], 99.50th=[219153], 99.90th=[267387], 99.95th=[283116], | 99.99th=[283116] bw ( KiB/s): min= 7, max= 126, per=25.14%, avg=45.00, stdev=20.73, samples=273 iops : min= 1, max= 31, avg=10.59, stdev= 5.22, samples=273 lat (usec) : 50=0.16%, 100=4.39%, 250=0.59%, 500=0.10%, 750=0.13% lat (usec) : 1000=0.07% lat (msec) : 2=6.35%, 4=3.68%, 10=6.84%, 20=7.98%, 50=34.05% lat (msec) : 100=26.11%, 250=9.28%, 500=0.26%, 2000=0.03% cpu : usr=0.09%, sys=4.71%, ctx=6452, 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=144534: Wed Sep 16 20:50:07 2026 read: IOPS=10, BW=43.2KiB/s (44.2kB/s)(6028KiB/139574msec) clat (usec): min=27, max=1339.6k, avg=43807.32, stdev=45860.18 lat (usec): min=27, max=1339.6k, avg=43817.94, stdev=45860.86 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 68], 10.00th=[ 102], | 20.00th=[ 19792], 30.00th=[ 26084], 40.00th=[ 31065], | 50.00th=[ 37487], 60.00th=[ 44303], 70.00th=[ 52691], | 80.00th=[ 64226], 90.00th=[ 84411], 95.00th=[ 103285], | 99.00th=[ 145753], 99.50th=[ 168821], 99.90th=[ 221250], | 99.95th=[1333789], 99.99th=[1333789] bw ( KiB/s): min= 7, max= 119, per=25.23%, avg=43.14, stdev=21.01, samples=270 iops : min= 1, max= 29, avg=10.12, stdev= 5.30, samples=270 write: IOPS=11, BW=44.9KiB/s (45.9kB/s)(6260KiB/139574msec); 0 zone resets clat (usec): min=741, max=500841, avg=46644.20, stdev=49085.63 lat (usec): min=743, max=503831, avg=46662.20, stdev=49101.78 clat percentiles (usec): | 1.00th=[ 1156], 5.00th=[ 1319], 10.00th=[ 1614], 20.00th=[ 5145], | 30.00th=[ 10159], 40.00th=[ 21627], 50.00th=[ 33817], 60.00th=[ 45876], | 70.00th=[ 60556], 80.00th=[ 79168], 90.00th=[111674], 95.00th=[135267], | 99.00th=[204473], 99.50th=[233833], 99.90th=[455082], 99.95th=[501220], | 99.99th=[501220] bw ( KiB/s): min= 7, max= 119, per=25.04%, avg=44.81, stdev=19.50, samples=270 iops : min= 1, max= 29, avg=10.54, stdev= 4.91, samples=270 lat (usec) : 50=0.42%, 100=4.43%, 250=0.55%, 500=0.07%, 750=0.07% lat (usec) : 1000=0.16% lat (msec) : 2=5.79%, 4=2.83%, 10=6.80%, 20=8.33%, 50=35.68% lat (msec) : 100=25.29%, 250=9.31%, 500=0.20%, 750=0.03%, 2000=0.03% cpu : usr=0.09%, sys=4.79%, ctx=6538, 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=144535: Wed Sep 16 20:50:07 2026 read: IOPS=11, BW=44.0KiB/s (45.1kB/s)(6052KiB/137475msec) clat (usec): min=33, max=319097, avg=43026.12, stdev=33860.22 lat (usec): min=33, max=319098, avg=43027.72, stdev=33860.31 clat percentiles (usec): | 1.00th=[ 43], 5.00th=[ 63], 10.00th=[ 82], 20.00th=[ 18744], | 30.00th=[ 25297], 40.00th=[ 30802], 50.00th=[ 36963], 60.00th=[ 43779], | 70.00th=[ 52691], 80.00th=[ 63701], 90.00th=[ 84411], 95.00th=[105382], | 99.00th=[149947], 99.50th=[187696], 99.90th=[283116], 99.95th=[320865], | 99.99th=[320865] bw ( KiB/s): min= 7, max= 104, per=26.03%, avg=44.52, stdev=20.33, samples=264 iops : min= 1, max= 26, avg=10.46, stdev= 5.11, samples=264 write: IOPS=11, BW=45.4KiB/s (46.4kB/s)(6236KiB/137475msec); 0 zone resets clat (usec): min=892, max=1530.5k, avg=46086.19, stdev=61247.46 lat (usec): min=893, max=1530.5k, avg=46090.91, stdev=61246.87 clat percentiles (usec): | 1.00th=[ 1090], 5.00th=[ 1303], 10.00th=[ 1631], | 20.00th=[ 4686], 30.00th=[ 8848], 40.00th=[ 19530], | 50.00th=[ 33817], 60.00th=[ 45351], 70.00th=[ 60031], | 80.00th=[ 77071], 90.00th=[ 107480], 95.00th=[ 131597], | 99.00th=[ 204473], 99.50th=[ 283116], 99.90th=[ 467665], | 99.95th=[1535116], 99.99th=[1535116] bw ( KiB/s): min= 7, max= 111, per=25.30%, avg=45.29, stdev=21.73, samples=267 iops : min= 1, max= 27, avg=10.66, stdev= 5.46, samples=267 lat (usec) : 50=0.81%, 100=4.56%, 250=0.52%, 500=0.10%, 750=0.03% lat (usec) : 1000=0.13% lat (msec) : 2=5.89%, 4=3.58%, 10=6.87%, 20=8.69%, 50=34.02% lat (msec) : 100=25.81%, 250=8.63%, 500=0.33%, 2000=0.03% cpu : usr=0.07%, sys=4.77%, ctx=6364, 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=172KiB/s (176kB/s), 42.6KiB/s-44.0KiB/s (43.6kB/s-45.1kB/s), io=23.4MiB (24.6MB), run=137475-139720msec WRITE: bw=180KiB/s (184kB/s), 44.9KiB/s-45.5KiB/s (45.9kB/s-46.6kB/s), io=24.6MiB (25.7MB), run=137475-139720msec fio: pid=144530, err=5/file:backend.c:481, func=full resid, error=Input/output error rand-rw: (groupid=0, jobs=1): err= 0: pid=144528: Wed Sep 16 20:52:13 2026 read: IOPS=5, BW=22.5KiB/s (23.1kB/s)(5992KiB/265973msec) clat (msec): min=5, max=1301, avg=40.33, stdev=52.91 lat (msec): min=5, max=1301, avg=40.33, stdev=52.91 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 16], | 30.00th=[ 20], 40.00th=[ 25], 50.00th=[ 29], 60.00th=[ 35], | 70.00th=[ 41], 80.00th=[ 54], 90.00th=[ 78], 95.00th=[ 105], | 99.00th=[ 192], 99.50th=[ 321], 99.90th=[ 667], 99.95th=[ 1301], | 99.99th=[ 1301] bw ( KiB/s): min= 7, max= 95, per=32.76%, avg=25.22, stdev=16.87, samples=459 iops : min= 1, max= 23, avg= 5.66, stdev= 4.26, samples=459 write: IOPS=5, BW=23.7KiB/s (24.2kB/s)(6296KiB/265973msec); 0 zone resets clat (msec): min=36, max=590, avg=130.27, stdev=68.69 lat (msec): min=36, max=590, avg=130.28, stdev=68.69 clat percentiles (msec): | 1.00th=[ 45], 5.00th=[ 56], 10.00th=[ 66], 20.00th=[ 79], | 30.00th=[ 89], 40.00th=[ 100], 50.00th=[ 110], 60.00th=[ 126], | 70.00th=[ 146], 80.00th=[ 178], 90.00th=[ 222], 95.00th=[ 259], | 99.00th=[ 359], 99.50th=[ 418], 99.90th=[ 584], 99.95th=[ 592], | 99.99th=[ 592] bw ( KiB/s): min= 7, max= 56, per=29.21%, avg=23.66, stdev=11.16, samples=512 iops : min= 1, max= 14, avg= 5.27, stdev= 2.86, samples=512 lat (msec) : 10=2.67%, 20=12.43%, 50=23.89%, 100=27.93%, 250=29.92% lat (msec) : 500=2.96%, 750=0.16%, 2000=0.03% cpu : usr=0.05%, sys=1.28%, ctx=5608, 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=144529: Wed Sep 16 20:52:13 2026 read: IOPS=5, BW=22.4KiB/s (22.0kB/s)(5940KiB/264866msec) clat (msec): min=5, max=1390, avg=40.61, stdev=52.42 lat (msec): min=5, max=1390, avg=40.62, stdev=52.42 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=[ 34], | 70.00th=[ 42], 80.00th=[ 54], 90.00th=[ 84], 95.00th=[ 109], | 99.00th=[ 197], 99.50th=[ 253], 99.90th=[ 550], 99.95th=[ 1385], | 99.99th=[ 1385] bw ( KiB/s): min= 7, max= 95, per=33.25%, avg=25.60, stdev=17.39, samples=448 iops : min= 1, max= 23, avg= 5.76, stdev= 4.39, samples=448 write: IOPS=5, BW=23.0KiB/s (24.5kB/s)(6348KiB/264866msec); 0 zone resets clat (msec): min=35, max=677, avg=128.59, stdev=68.35 lat (msec): min=35, max=677, avg=128.59, stdev=68.35 clat percentiles (msec): | 1.00th=[ 45], 5.00th=[ 57], 10.00th=[ 63], 20.00th=[ 75], | 30.00th=[ 86], 40.00th=[ 96], 50.00th=[ 109], 60.00th=[ 127], | 70.00th=[ 146], 80.00th=[ 176], 90.00th=[ 222], 95.00th=[ 259], | 99.00th=[ 347], 99.50th=[ 418], 99.90th=[ 489], 99.95th=[ 676], | 99.99th=[ 676] bw ( KiB/s): min= 7, max= 55, per=29.21%, avg=23.66, stdev=11.87, samples=517 iops : min= 1, max= 13, avg= 5.27, stdev= 3.02, samples=517 lat (msec) : 10=2.57%, 20=12.40%, 50=23.60%, 100=29.17%, 250=28.87% lat (msec) : 500=3.29%, 750=0.07%, 2000=0.03% cpu : usr=0.04%, sys=1.30%, ctx=5740, 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= 5 (file:backend.c:481, func=full resid, error=Input/output error): pid=144530: Wed Sep 16 20:52:13 2026 read: IOPS=4, BW=16.5KiB/s (16.9kB/s)(2700KiB/163844msec) clat (msec): min=7, max=670, avg=61.33, stdev=55.45 lat (msec): min=7, max=670, avg=61.34, stdev=55.45 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 15], 10.00th=[ 18], 20.00th=[ 26], | 30.00th=[ 31], 40.00th=[ 36], 50.00th=[ 45], 60.00th=[ 57], | 70.00th=[ 71], 80.00th=[ 91], 90.00th=[ 122], 95.00th=[ 150], | 99.00th=[ 249], 99.50th=[ 326], 99.90th=[ 667], 99.95th=[ 667], | 99.99th=[ 667] bw ( KiB/s): min= 7, max= 79, per=23.80%, avg=18.33, stdev=12.68, samples=280 iops : min= 1, max= 19, avg= 3.91, stdev= 3.18, samples=280 write: IOPS=4, BW=16.7KiB/s (17.1kB/s)(2736KiB/163844msec); 0 zone resets clat (msec): min=26, max=1508, avg=178.36, stdev=93.95 lat (msec): min=26, max=1508, avg=178.36, stdev=93.95 clat percentiles (msec): | 1.00th=[ 54], 5.00th=[ 79], 10.00th=[ 91], 20.00th=[ 113], | 30.00th=[ 130], 40.00th=[ 146], 50.00th=[ 165], 60.00th=[ 184], | 70.00th=[ 207], 80.00th=[ 228], 90.00th=[ 271], 95.00th=[ 317], | 99.00th=[ 447], 99.50th=[ 550], 99.90th=[ 1502], 99.95th=[ 1502], | 99.99th=[ 1502] bw ( KiB/s): min= 7, max= 48, per=20.65%, avg=16.72, stdev= 8.30, samples=309 iops : min= 1, max= 12, avg= 3.51, stdev= 2.11, samples=309 lat (msec) : 10=0.81%, 20=5.88%, 50=21.10%, 100=20.44%, 250=43.97% lat (msec) : 500=7.28%, 750=0.37%, 2000=0.07% cpu : usr=0.03%, sys=0.88%, ctx=1904, majf=0, minf=22 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=676,684,0,0 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=144531: Wed Sep 16 20:52:13 2026 read: IOPS=5, BW=22.8KiB/s (23.3kB/s)(6052KiB/265775msec) clat (msec): min=4, max=414, avg=39.59, stdev=36.40 lat (msec): min=4, max=414, avg=39.59, stdev=36.40 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 16], | 30.00th=[ 20], 40.00th=[ 24], 50.00th=[ 29], 60.00th=[ 34], | 70.00th=[ 42], 80.00th=[ 54], 90.00th=[ 81], 95.00th=[ 113], | 99.00th=[ 167], 99.50th=[ 209], 99.90th=[ 338], 99.95th=[ 414], | 99.99th=[ 414] bw ( KiB/s): min= 7, max= 119, per=33.31%, avg=25.65, stdev=17.72, samples=456 iops : min= 1, max= 29, avg= 5.77, stdev= 4.47, samples=456 write: IOPS=5, BW=23.5KiB/s (24.0kB/s)(6236KiB/265775msec); 0 zone resets clat (msec): min=32, max=1515, avg=131.74, stdev=80.36 lat (msec): min=32, max=1515, avg=131.74, stdev=80.36 clat percentiles (msec): | 1.00th=[ 44], 5.00th=[ 56], 10.00th=[ 64], 20.00th=[ 77], | 30.00th=[ 87], 40.00th=[ 100], 50.00th=[ 112], 60.00th=[ 128], | 70.00th=[ 148], 80.00th=[ 176], 90.00th=[ 222], 95.00th=[ 271], | 99.00th=[ 393], 99.50th=[ 493], 99.90th=[ 684], 99.95th=[ 1519], | 99.99th=[ 1519] bw ( KiB/s): min= 7, max= 63, per=28.69%, avg=23.24, stdev=11.45, samples=517 iops : min= 1, max= 15, avg= 5.16, stdev= 2.91, samples=517 lat (msec) : 10=2.38%, 20=13.15%, 50=23.83%, 100=27.67%, 250=29.33% lat (msec) : 500=3.45%, 750=0.16%, 2000=0.03% cpu : usr=0.05%, sys=1.33%, ctx=5829, 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=77.8KiB/s (79.6kB/s), 16.5KiB/s-22.8KiB/s (16.9kB/s-23.3kB/s), io=20.2MiB (21.2MB), run=163844-265973msec WRITE: bw=81.3KiB/s (83.2kB/s), 16.7KiB/s-23.0KiB/s (17.1kB/s-24.5kB/s), io=21.1MiB (22.1MB), run=163844-265973msec 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=144589: Wed Sep 16 20:53:00 2026 read: IOPS=10, BW=174KiB/s (178kB/s)(5920KiB/34065msec) clat (usec): min=37, max=306686, avg=45418.67, stdev=38133.12 lat (usec): min=38, max=306688, avg=45441.23, stdev=38147.09 clat percentiles (usec): | 1.00th=[ 45], 5.00th=[ 63], 10.00th=[ 71], 20.00th=[ 404], | 30.00th=[ 28181], 40.00th=[ 35390], 50.00th=[ 42206], 60.00th=[ 47449], | 70.00th=[ 58459], 80.00th=[ 68682], 90.00th=[ 89654], 95.00th=[106431], | 99.00th=[179307], 99.50th=[227541], 99.90th=[308282], 99.95th=[308282], | 99.99th=[308282] bw ( KiB/s): min= 30, max= 378, per=24.41%, avg=171.57, stdev=71.95, samples=65 iops : min= 1, max= 23, avg= 9.94, stdev= 4.52, samples=65 write: IOPS=11, BW=187KiB/s (191kB/s)(6368KiB/34065msec); 0 zone resets clat (usec): min=1285, max=461729, avg=43073.80, stdev=52435.64 lat (usec): min=1287, max=461730, avg=43076.41, stdev=52435.64 clat percentiles (usec): | 1.00th=[ 1549], 5.00th=[ 1893], 10.00th=[ 3032], 20.00th=[ 5604], | 30.00th=[ 10290], 40.00th=[ 16057], 50.00th=[ 26346], 60.00th=[ 40633], | 70.00th=[ 51119], 80.00th=[ 68682], 90.00th=[ 99091], 95.00th=[131597], | 99.00th=[225444], 99.50th=[392168], 99.90th=[463471], 99.95th=[463471], | 99.99th=[463471] bw ( KiB/s): min= 31, max= 378, per=24.88%, avg=183.85, stdev=73.71, samples=66 iops : min= 1, max= 23, avg=10.71, stdev= 4.67, samples=66 lat (usec) : 50=0.78%, 100=6.90%, 250=1.43%, 500=0.52%, 750=0.13% lat (usec) : 1000=0.13% lat (msec) : 2=3.91%, 4=3.91%, 10=8.20%, 20=7.29%, 50=32.68% lat (msec) : 100=26.04%, 250=7.55%, 500=0.52% cpu : usr=0.09%, sys=5.18%, ctx=1481, 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=144591: Wed Sep 16 20:53:00 2026 read: IOPS=10, BW=172KiB/s (176kB/s)(5744KiB/33459msec) clat (usec): min=40, max=237837, avg=47453.12, stdev=35770.06 lat (usec): min=41, max=237839, avg=47454.67, stdev=35770.09 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 73], 10.00th=[ 87], 20.00th=[ 19006], | 30.00th=[ 28705], 40.00th=[ 36439], 50.00th=[ 44827], 60.00th=[ 52691], | 70.00th=[ 61080], 80.00th=[ 72877], 90.00th=[ 90702], 95.00th=[106431], | 99.00th=[168821], 99.50th=[200279], 99.90th=[238027], 99.95th=[238027], | 99.99th=[238027] bw ( KiB/s): min= 47, max= 380, per=24.34%, avg=171.14, stdev=74.24, samples=65 iops : min= 2, max= 23, avg= 9.91, stdev= 4.67, samples=65 write: IOPS=12, BW=196KiB/s (200kB/s)(6544KiB/33459msec); 0 zone resets clat (usec): min=1482, max=441320, avg=39917.63, stdev=42296.23 lat (usec): min=1484, max=441324, avg=39953.92, stdev=42348.26 clat percentiles (usec): | 1.00th=[ 1582], 5.00th=[ 1893], 10.00th=[ 3556], 20.00th=[ 6128], | 30.00th=[ 10945], 40.00th=[ 18482], 50.00th=[ 27657], 60.00th=[ 40109], | 70.00th=[ 51119], 80.00th=[ 67634], 90.00th=[ 92799], 95.00th=[111674], | 99.00th=[156238], 99.50th=[206570], 99.90th=[442500], 99.95th=[442500], | 99.99th=[442500] bw ( KiB/s): min= 30, max= 349, per=26.29%, avg=194.25, stdev=74.98, samples=65 iops : min= 1, max= 21, avg=11.37, stdev= 4.72, samples=65 lat (usec) : 50=0.39%, 100=5.47%, 250=1.43%, 500=0.26%, 1000=0.26% lat (msec) : 2=3.26%, 4=2.99%, 10=9.38%, 20=8.07%, 50=31.90% lat (msec) : 100=29.82%, 250=6.64%, 500=0.13% cpu : usr=0.11%, sys=5.77%, ctx=1598, 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=144592: Wed Sep 16 20:53:00 2026 read: IOPS=11, BW=190KiB/s (195kB/s)(6256KiB/32927msec) clat (usec): min=37, max=245279, avg=45254.58, stdev=37553.12 lat (usec): min=38, max=245280, avg=45256.34, stdev=37553.07 clat percentiles (usec): | 1.00th=[ 42], 5.00th=[ 65], 10.00th=[ 74], 20.00th=[ 151], | 30.00th=[ 28967], 40.00th=[ 33817], 50.00th=[ 39584], 60.00th=[ 50070], | 70.00th=[ 58459], 80.00th=[ 71828], 90.00th=[ 87557], 95.00th=[111674], | 99.00th=[185598], 99.50th=[191890], 99.90th=[244319], 99.95th=[244319], | 99.99th=[244319] bw ( KiB/s): min= 30, max= 447, per=27.26%, avg=191.67, stdev=86.67, samples=64 iops : min= 1, max= 27, avg=11.20, stdev= 5.45, samples=64 write: IOPS=11, BW=183KiB/s (188kB/s)(6032KiB/32927msec); 0 zone resets clat (usec): min=1077, max=335425, avg=40291.94, stdev=44229.46 lat (usec): min=1115, max=335429, avg=40295.25, stdev=44229.99 clat percentiles (usec): | 1.00th=[ 1729], 5.00th=[ 2040], 10.00th=[ 3326], 20.00th=[ 7111], | 30.00th=[ 10421], 40.00th=[ 16712], 50.00th=[ 24773], 60.00th=[ 36963], | 70.00th=[ 49546], 80.00th=[ 66323], 90.00th=[ 93848], 95.00th=[122160], | 99.00th=[210764], 99.50th=[261096], 99.90th=[333448], 99.95th=[333448], | 99.99th=[333448] bw ( KiB/s): min= 31, max= 380, per=24.65%, avg=182.19, stdev=72.20, samples=64 iops : min= 1, max= 23, avg=10.61, stdev= 4.54, samples=64 lat (usec) : 50=1.30%, 100=8.20%, 250=0.91%, 500=0.39% lat (msec) : 2=2.08%, 4=4.17%, 10=7.81%, 20=8.07%, 50=32.03% lat (msec) : 100=27.08%, 250=7.68%, 500=0.26% cpu : usr=0.05%, sys=5.28%, ctx=1587, 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=144593: Wed Sep 16 20:53:00 2026 read: IOPS=11, BW=181KiB/s (186kB/s)(6032KiB/33280msec) clat (usec): min=41, max=359241, avg=48949.23, stdev=41347.10 lat (usec): min=41, max=359242, avg=48954.86, stdev=41342.53 clat percentiles (usec): | 1.00th=[ 49], 5.00th=[ 68], 10.00th=[ 78], 20.00th=[ 1287], | 30.00th=[ 28181], 40.00th=[ 36963], 50.00th=[ 45876], 60.00th=[ 52691], | 70.00th=[ 63177], 80.00th=[ 76022], 90.00th=[ 99091], 95.00th=[116917], | 99.00th=[168821], 99.50th=[235930], 99.90th=[358613], 99.95th=[358613], | 99.99th=[358613] bw ( KiB/s): min= 30, max= 407, per=25.94%, avg=182.39, stdev=72.50, samples=64 iops : min= 1, max= 25, avg=10.62, stdev= 4.61, samples=64 write: IOPS=11, BW=188KiB/s (192kB/s)(6256KiB/33280msec); 0 zone resets clat (usec): min=1513, max=192218, avg=37578.73, stdev=39156.36 lat (usec): min=1516, max=192221, avg=37581.78, stdev=39156.21 clat percentiles (usec): | 1.00th=[ 1745], 5.00th=[ 2180], 10.00th=[ 3261], 20.00th=[ 5997], | 30.00th=[ 8455], 40.00th=[ 14746], 50.00th=[ 26346], 60.00th=[ 33817], | 70.00th=[ 46924], 80.00th=[ 64750], 90.00th=[ 96994], 95.00th=[127402], | 99.00th=[162530], 99.50th=[187696], 99.90th=[191890], 99.95th=[191890], | 99.99th=[191890] bw ( KiB/s): min= 31, max= 383, per=25.48%, avg=188.29, stdev=85.47, samples=65 iops : min= 1, max= 23, avg=11.00, stdev= 5.38, samples=65 lat (usec) : 50=0.65%, 100=6.64%, 250=2.21%, 1000=0.26% lat (msec) : 2=2.47%, 4=4.30%, 10=11.20%, 20=7.16%, 50=28.78% lat (msec) : 100=26.95%, 250=9.24%, 500=0.13% cpu : usr=0.09%, sys=5.04%, ctx=1542, 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=703KiB/s (720kB/s), 172KiB/s-190KiB/s (176kB/s-195kB/s), io=23.4MiB (24.5MB), run=32927-34065msec WRITE: bw=740KiB/s (758kB/s), 183KiB/s-196KiB/s (188kB/s-200kB/s), io=24.6MiB (25.8MB), run=32927-34065msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144584: Wed Sep 16 20:53:37 2026 read: IOPS=5, BW=83.4KiB/s (85.4kB/s)(5920KiB/70972msec) clat (msec): min=9, max=291, avg=43.81, stdev=39.88 lat (msec): min=9, max=291, avg=43.81, stdev=39.88 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 13], 10.00th=[ 14], 20.00th=[ 18], | 30.00th=[ 23], 40.00th=[ 28], 50.00th=[ 32], 60.00th=[ 37], | 70.00th=[ 47], 80.00th=[ 59], 90.00th=[ 85], 95.00th=[ 117], | 99.00th=[ 230], 99.50th=[ 266], 99.90th=[ 292], 99.95th=[ 292], | 99.99th=[ 292] bw ( KiB/s): min= 31, max= 288, per=26.85%, avg=89.96, stdev=53.84, samples=127 iops : min= 1, max= 18, avg= 4.81, stdev= 3.40, samples=127 write: IOPS=5, BW=89.7KiB/s (91.9kB/s)(6368KiB/70972msec); 0 zone resets clat (msec): min=39, max=501, avg=137.10, stdev=65.90 lat (msec): min=39, max=501, avg=137.10, stdev=65.90 clat percentiles (msec): | 1.00th=[ 54], 5.00th=[ 64], 10.00th=[ 74], 20.00th=[ 89], | 30.00th=[ 99], 40.00th=[ 108], 50.00th=[ 118], 60.00th=[ 134], | 70.00th=[ 153], 80.00th=[ 180], 90.00th=[ 222], 95.00th=[ 262], | 99.00th=[ 384], 99.50th=[ 430], 99.90th=[ 502], 99.95th=[ 502], | 99.99th=[ 502] bw ( KiB/s): min= 31, max= 191, per=25.20%, avg=88.95, stdev=42.08, samples=139 iops : min= 1, max= 11, avg= 4.74, stdev= 2.67, samples=139 lat (msec) : 10=0.65%, 20=10.81%, 50=24.09%, 100=25.78%, 250=35.16% lat (msec) : 500=3.39%, 750=0.13% cpu : usr=0.04%, sys=1.29%, ctx=1339, 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=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=144585: Wed Sep 16 20:53:37 2026 read: IOPS=5, BW=80.6KiB/s (82.5kB/s)(5744KiB/71309msec) clat (msec): min=5, max=368, avg=44.90, stdev=46.78 lat (msec): min=5, max=368, avg=44.91, stdev=46.78 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 19], 40.00th=[ 23], 50.00th=[ 27], 60.00th=[ 35], | 70.00th=[ 43], 80.00th=[ 63], 90.00th=[ 114], 95.00th=[ 150], | 99.00th=[ 218], 99.50th=[ 239], 99.90th=[ 368], 99.95th=[ 368], | 99.99th=[ 368] bw ( KiB/s): min= 22, max= 413, per=28.72%, avg=96.22, stdev=65.58, samples=116 iops : min= 1, max= 25, avg= 5.18, stdev= 4.15, samples=116 write: IOPS=5, BW=91.8KiB/s (93.0kB/s)(6544KiB/71309msec); 0 zone resets clat (msec): min=39, max=420, avg=134.45, stdev=66.87 lat (msec): min=39, max=420, avg=134.46, stdev=66.88 clat percentiles (msec): | 1.00th=[ 47], 5.00th=[ 61], 10.00th=[ 69], 20.00th=[ 83], | 30.00th=[ 93], 40.00th=[ 106], 50.00th=[ 118], 60.00th=[ 131], | 70.00th=[ 146], 80.00th=[ 176], 90.00th=[ 230], 95.00th=[ 275], | 99.00th=[ 355], 99.50th=[ 384], 99.90th=[ 422], 99.95th=[ 422], | 99.99th=[ 422] bw ( KiB/s): min= 30, max= 190, per=26.40%, avg=93.19, stdev=43.33, samples=136 iops : min= 1, max= 11, avg= 5.00, stdev= 2.76, samples=136 lat (msec) : 10=2.08%, 20=14.06%, 50=20.31%, 100=23.31%, 250=36.72% lat (msec) : 500=3.52% cpu : usr=0.05%, sys=1.32%, ctx=1389, 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=144586: Wed Sep 16 20:53:37 2026 read: IOPS=5, BW=89.6KiB/s (91.7kB/s)(6256KiB/69840msec) clat (msec): min=7, max=272, avg=42.27, stdev=39.05 lat (msec): min=7, max=272, avg=42.27, stdev=39.05 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 14], 20.00th=[ 17], | 30.00th=[ 21], 40.00th=[ 24], 50.00th=[ 28], 60.00th=[ 35], | 70.00th=[ 45], 80.00th=[ 58], 90.00th=[ 92], 95.00th=[ 124], | 99.00th=[ 236], 99.50th=[ 253], 99.90th=[ 275], 99.95th=[ 275], | 99.99th=[ 275] bw ( KiB/s): min= 31, max= 319, per=29.38%, avg=98.43, stdev=71.06, samples=125 iops : min= 1, max= 19, avg= 5.35, stdev= 4.47, samples=125 write: IOPS=5, BW=86.4KiB/s (88.4kB/s)(6032KiB/69840msec); 0 zone resets clat (msec): min=42, max=532, avg=141.20, stdev=71.90 lat (msec): min=42, max=532, avg=141.21, stdev=71.91 clat percentiles (msec): | 1.00th=[ 48], 5.00th=[ 63], 10.00th=[ 73], 20.00th=[ 87], | 30.00th=[ 101], 40.00th=[ 111], 50.00th=[ 125], 60.00th=[ 138], | 70.00th=[ 155], 80.00th=[ 184], 90.00th=[ 230], 95.00th=[ 284], | 99.00th=[ 435], 99.50th=[ 464], 99.90th=[ 535], 99.95th=[ 535], | 99.99th=[ 535] bw ( KiB/s): min= 30, max= 191, per=24.61%, avg=86.86, stdev=39.99, samples=135 iops : min= 1, max= 11, avg= 4.61, stdev= 2.55, samples=135 lat (msec) : 10=1.17%, 20=12.89%, 50=25.78%, 100=21.74%, 250=34.11% lat (msec) : 500=4.17%, 750=0.13% cpu : usr=0.04%, sys=1.34%, ctx=1334, 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=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=144587: Wed Sep 16 20:53:37 2026 read: IOPS=5, BW=85.9KiB/s (87.0kB/s)(6032KiB/70212msec) clat (msec): min=7, max=246, avg=42.15, stdev=38.80 lat (msec): min=7, max=246, avg=42.16, stdev=38.80 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 14], 20.00th=[ 17], | 30.00th=[ 20], 40.00th=[ 24], 50.00th=[ 28], 60.00th=[ 35], | 70.00th=[ 46], 80.00th=[ 57], 90.00th=[ 87], 95.00th=[ 121], | 99.00th=[ 215], 99.50th=[ 224], 99.90th=[ 247], 99.95th=[ 247], | 99.99th=[ 247] bw ( KiB/s): min= 22, max= 256, per=29.46%, avg=98.70, stdev=55.47, samples=119 iops : min= 1, max= 16, avg= 5.35, stdev= 3.56, samples=119 write: IOPS=5, BW=89.1KiB/s (91.2kB/s)(6256KiB/70212msec); 0 zone resets clat (msec): min=37, max=664, avg=138.46, stdev=72.41 lat (msec): min=37, max=664, avg=138.47, stdev=72.41 clat percentiles (msec): | 1.00th=[ 47], 5.00th=[ 64], 10.00th=[ 71], 20.00th=[ 85], | 30.00th=[ 95], 40.00th=[ 105], 50.00th=[ 120], 60.00th=[ 136], | 70.00th=[ 155], 80.00th=[ 186], 90.00th=[ 241], 95.00th=[ 275], | 99.00th=[ 359], 99.50th=[ 451], 99.90th=[ 667], 99.95th=[ 667], | 99.99th=[ 667] bw ( KiB/s): min= 30, max= 223, per=25.86%, avg=91.30, stdev=43.38, samples=134 iops : min= 1, max= 13, avg= 4.89, stdev= 2.76, samples=134 lat (msec) : 10=1.04%, 20=14.58%, 50=21.61%, 100=25.65%, 250=33.20% lat (msec) : 500=3.78%, 750=0.13% cpu : usr=0.05%, sys=1.41%, ctx=1405, 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=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=336KiB/s (344kB/s), 80.6KiB/s-89.6KiB/s (82.5kB/s-91.7kB/s), io=23.4MiB (24.5MB), run=69840-71309msec WRITE: bw=353KiB/s (362kB/s), 86.4KiB/s-91.8KiB/s (88.4kB/s-93.0kB/s), io=24.6MiB (25.8MB), run=69840-71309msec 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=144612: Wed Sep 16 20:53:55 2026 read: IOPS=1, BW=1160KiB/s (1188kB/s)(7168KiB/6178msec) clat (msec): min=97, max=343, avg=226.34, stdev=99.14 lat (msec): min=97, max=343, avg=226.34, stdev=99.14 clat percentiles (msec): | 1.00th=[ 97], 5.00th=[ 97], 10.00th=[ 97], 20.00th=[ 138], | 30.00th=[ 161], 40.00th=[ 161], 50.00th=[ 218], 60.00th=[ 296], | 70.00th=[ 296], 80.00th=[ 334], 90.00th=[ 342], 95.00th=[ 342], | 99.00th=[ 342], 99.50th=[ 342], 99.90th=[ 342], 99.95th=[ 342], | 99.99th=[ 342] bw ( KiB/s): min= 1765, max= 4071, per=100.00%, avg=2979.50, stdev=1251.40, samples=4 iops : min= 1, max= 3, avg= 2.00, stdev= 1.15, samples=4 write: IOPS=0, BW=829KiB/s (849kB/s)(5120KiB/6178msec); 0 zone resets clat (msec): min=375, max=2490, avg=872.54, stdev=908.34 lat (msec): min=376, max=2490, avg=872.67, stdev=908.33 clat percentiles (msec): | 1.00th=[ 376], 5.00th=[ 376], 10.00th=[ 376], 20.00th=[ 376], | 30.00th=[ 401], 40.00th=[ 401], 50.00th=[ 518], 60.00th=[ 518], | 70.00th=[ 584], 80.00th=[ 584], 90.00th=[ 2500], 95.00th=[ 2500], | 99.00th=[ 2500], 99.50th=[ 2500], 99.90th=[ 2500], 99.95th=[ 2500], | 99.99th=[ 2500] bw ( KiB/s): min= 1976, max= 2048, per=48.60%, avg=2024.20, stdev=27.98, samples=5 iops : min= 1, max= 2, avg= 1.20, stdev= 0.45, samples=5 lat (msec) : 100=8.33%, 250=25.00%, 500=41.67%, 750=16.67%, >=2000=8.33% cpu : usr=0.00%, sys=3.06%, ctx=102, 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=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=144613: Wed Sep 16 20:53:55 2026 read: IOPS=0, BW=298KiB/s (305kB/s)(2048KiB/6883msec) clat (msec): min=102, max=113, avg=108.05, stdev= 7.44 lat (msec): min=102, max=113, avg=108.05, stdev= 7.44 clat percentiles (msec): | 1.00th=[ 104], 5.00th=[ 104], 10.00th=[ 104], 20.00th=[ 104], | 30.00th=[ 104], 40.00th=[ 104], 50.00th=[ 104], 60.00th=[ 114], | 70.00th=[ 114], 80.00th=[ 114], 90.00th=[ 114], 95.00th=[ 114], | 99.00th=[ 114], 99.50th=[ 114], 99.90th=[ 114], 99.95th=[ 114], | 99.99th=[ 114] bw ( KiB/s): min= 1750, max= 2027, per=63.48%, avg=1888.50, stdev=195.87, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1488KiB/s (1523kB/s)(10.0MiB/6883msec); 0 zone resets clat (msec): min=199, max=2381, avg=662.62, stdev=692.81 lat (msec): min=199, max=2381, avg=662.73, stdev=692.83 clat percentiles (msec): | 1.00th=[ 201], 5.00th=[ 201], 10.00th=[ 201], 20.00th=[ 257], | 30.00th=[ 321], 40.00th=[ 321], 50.00th=[ 347], 60.00th=[ 384], | 70.00th=[ 456], 80.00th=[ 575], 90.00th=[ 1385], 95.00th=[ 2366], | 99.00th=[ 2366], 99.50th=[ 2366], 99.90th=[ 2366], 99.95th=[ 2366], | 99.99th=[ 2366] bw ( KiB/s): min= 1750, max= 4071, per=61.40%, avg=2557.43, stdev=1004.47, samples=7 iops : min= 1, max= 3, avg= 1.71, stdev= 0.95, samples=7 lat (msec) : 250=25.00%, 500=50.00%, 750=8.33%, 2000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=3.21%, ctx=102, 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=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=144614: Wed Sep 16 20:53:55 2026 read: IOPS=1, BW=1034KiB/s (1059kB/s)(6144KiB/5943msec) clat (msec): min=95, max=1109, avg=415.21, stdev=368.22 lat (msec): min=95, max=1109, avg=415.21, stdev=368.22 clat percentiles (msec): | 1.00th=[ 96], 5.00th=[ 96], 10.00th=[ 96], 20.00th=[ 220], | 30.00th=[ 220], 40.00th=[ 232], 50.00th=[ 232], 60.00th=[ 313], | 70.00th=[ 523], 80.00th=[ 523], 90.00th=[ 1116], 95.00th=[ 1116], | 99.00th=[ 1116], 99.50th=[ 1116], 99.90th=[ 1116], 99.95th=[ 1116], | 99.99th=[ 1116] bw ( KiB/s): min= 2031, max= 4055, per=100.00%, avg=3377.67, stdev=1166.25, samples=3 iops : min= 1, max= 3, avg= 2.33, stdev= 1.15, samples=3 write: IOPS=1, BW=1034KiB/s (1059kB/s)(6144KiB/5943msec); 0 zone resets clat (msec): min=199, max=819, avg=553.41, stdev=237.23 lat (msec): min=199, max=819, avg=553.69, stdev=237.17 clat percentiles (msec): | 1.00th=[ 201], 5.00th=[ 201], 10.00th=[ 201], 20.00th=[ 359], | 30.00th=[ 359], 40.00th=[ 531], 50.00th=[ 531], 60.00th=[ 693], | 70.00th=[ 718], 80.00th=[ 718], 90.00th=[ 818], 95.00th=[ 818], | 99.00th=[ 818], 99.50th=[ 818], 99.90th=[ 818], 99.95th=[ 818], | 99.99th=[ 818] bw ( KiB/s): min= 1759, max= 2048, per=47.66%, avg=1985.17, stdev=111.79, samples=6 iops : min= 1, max= 2, avg= 1.17, stdev= 0.41, samples=6 lat (msec) : 100=8.33%, 250=25.00%, 500=16.67%, 750=33.33%, 1000=8.33% lat (msec) : 2000=8.33% cpu : usr=0.02%, sys=2.76%, ctx=73, 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=144615: Wed Sep 16 20:53:55 2026 read: IOPS=1, BW=1219KiB/s (1249kB/s)(5120KiB/4199msec) clat (msec): min=207, max=465, avg=314.44, stdev=125.98 lat (msec): min=207, max=465, avg=314.45, stdev=125.98 clat percentiles (msec): | 1.00th=[ 207], 5.00th=[ 207], 10.00th=[ 207], 20.00th=[ 207], | 30.00th=[ 228], 40.00th=[ 228], 50.00th=[ 234], 60.00th=[ 234], | 70.00th=[ 439], 80.00th=[ 439], 90.00th=[ 464], 95.00th=[ 464], | 99.00th=[ 464], 99.50th=[ 464], 99.90th=[ 464], 99.95th=[ 464], | 99.99th=[ 464] bw ( KiB/s): min= 2023, max= 4071, per=91.23%, avg=2714.00, stdev=1175.26, samples=3 iops : min= 1, max= 3, avg= 2.00, stdev= 1.00, samples=3 write: IOPS=1, BW=1707KiB/s (1748kB/s)(7168KiB/4199msec); 0 zone resets clat (msec): min=227, max=603, avg=360.82, stdev=133.94 lat (msec): min=227, max=603, avg=360.92, stdev=133.94 clat percentiles (msec): | 1.00th=[ 228], 5.00th=[ 228], 10.00th=[ 228], 20.00th=[ 239], | 30.00th=[ 259], 40.00th=[ 259], 50.00th=[ 372], 60.00th=[ 409], | 70.00th=[ 409], 80.00th=[ 418], 90.00th=[ 600], 95.00th=[ 600], | 99.00th=[ 600], 99.50th=[ 600], 99.90th=[ 600], 99.95th=[ 600], | 99.99th=[ 600] bw ( KiB/s): min= 2003, max= 4055, per=64.79%, avg=2698.40, stdev=950.39, samples=5 iops : min= 1, max= 3, avg= 2.00, stdev= 1.00, samples=5 lat (msec) : 250=41.67%, 500=50.00%, 750=8.33% cpu : usr=0.02%, sys=3.67%, ctx=71, 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=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=2975KiB/s (3047kB/s), 298KiB/s-1219KiB/s (305kB/s-1249kB/s), io=20.0MiB (20.0MB), run=4199-6883msec WRITE: bw=4166KiB/s (4266kB/s), 829KiB/s-1707KiB/s (849kB/s-1748kB/s), io=28.0MiB (29.4MB), run=4199-6883msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144616: Wed Sep 16 20:53:55 2026 read: IOPS=1, BW=1128KiB/s (1155kB/s)(7168KiB/6353msec) clat (msec): min=143, max=353, avg=244.88, stdev=67.61 lat (msec): min=143, max=353, avg=244.88, stdev=67.61 clat percentiles (msec): | 1.00th=[ 144], 5.00th=[ 144], 10.00th=[ 144], 20.00th=[ 192], | 30.00th=[ 220], 40.00th=[ 220], 50.00th=[ 257], 60.00th=[ 271], | 70.00th=[ 271], 80.00th=[ 279], 90.00th=[ 355], 95.00th=[ 355], | 99.00th=[ 355], 99.50th=[ 355], 99.90th=[ 355], 99.95th=[ 355], | 99.99th=[ 355] bw ( KiB/s): min= 1992, max= 4055, per=81.80%, avg=2418.00, stdev=915.40, samples=5 iops : min= 1, max= 3, avg= 1.60, stdev= 0.89, samples=5 write: IOPS=0, BW=806KiB/s (825kB/s)(5120KiB/6353msec); 0 zone resets clat (msec): min=286, max=2160, avg=850.57, stdev=746.99 lat (msec): min=286, max=2160, avg=850.67, stdev=747.00 clat percentiles (msec): | 1.00th=[ 288], 5.00th=[ 288], 10.00th=[ 288], 20.00th=[ 288], | 30.00th=[ 527], 40.00th=[ 527], 50.00th=[ 592], 60.00th=[ 592], | 70.00th=[ 693], 80.00th=[ 693], 90.00th=[ 2165], 95.00th=[ 2165], | 99.00th=[ 2165], 99.50th=[ 2165], 99.90th=[ 2165], 99.95th=[ 2165], | 99.99th=[ 2165] bw ( KiB/s): min= 1992, max= 4039, per=65.06%, avg=2693.00, stdev=1166.01, samples=3 iops : min= 1, max= 3, avg= 2.00, stdev= 1.00, samples=3 lat (msec) : 250=25.00%, 500=41.67%, 750=25.00%, >=2000=8.33% cpu : usr=0.00%, sys=8.55%, ctx=147, 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=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=144617: Wed Sep 16 20:53:55 2026 read: IOPS=0, BW=296KiB/s (303kB/s)(2048KiB/6927msec) clat (msec): min=223, max=234, avg=229.10, stdev= 7.74 lat (msec): min=223, max=234, avg=229.10, stdev= 7.74 clat percentiles (msec): | 1.00th=[ 224], 5.00th=[ 224], 10.00th=[ 224], 20.00th=[ 224], | 30.00th=[ 224], 40.00th=[ 224], 50.00th=[ 224], 60.00th=[ 234], | 70.00th=[ 234], 80.00th=[ 234], 90.00th=[ 234], 95.00th=[ 234], | 99.00th=[ 234], 99.50th=[ 234], 99.90th=[ 234], 99.95th=[ 234], | 99.99th=[ 234] bw ( KiB/s): min= 1943, max= 2003, per=66.75%, avg=1973.00, stdev=42.43, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1478KiB/s (1514kB/s)(10.0MiB/6927msec); 0 zone resets clat (msec): min=200, max=2281, avg=640.08, stdev=633.92 lat (msec): min=200, max=2281, avg=640.21, stdev=633.94 clat percentiles (msec): | 1.00th=[ 201], 5.00th=[ 201], 10.00th=[ 201], 20.00th=[ 241], | 30.00th=[ 247], 40.00th=[ 355], 50.00th=[ 355], 60.00th=[ 418], | 70.00th=[ 542], 80.00th=[ 693], 90.00th=[ 1083], 95.00th=[ 2265], | 99.00th=[ 2265], 99.50th=[ 2265], 99.90th=[ 2265], 99.95th=[ 2265], | 99.99th=[ 2265] bw ( KiB/s): min= 1992, max= 4096, per=65.19%, avg=2698.17, stdev=1048.82, samples=6 iops : min= 1, max= 4, avg= 2.00, stdev= 1.26, samples=6 lat (msec) : 250=41.67%, 500=25.00%, 750=16.67%, 2000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=8.45%, ctx=134, 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=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=144618: Wed Sep 16 20:53:55 2026 read: IOPS=1, BW=1415KiB/s (1449kB/s)(6144KiB/4341msec) clat (usec): min=566, max=396209, avg=217366.94, stdev=181220.90 lat (usec): min=567, max=396211, avg=217368.93, stdev=181220.83 clat percentiles (usec): | 1.00th=[ 570], 5.00th=[ 570], 10.00th=[ 570], 20.00th=[ 1020], | 30.00th=[ 1020], 40.00th=[210764], 50.00th=[210764], 60.00th=[304088], | 70.00th=[392168], 80.00th=[392168], 90.00th=[396362], 95.00th=[396362], | 99.00th=[396362], 99.50th=[396362], 99.90th=[396362], 99.95th=[396362], | 99.99th=[396362] bw ( KiB/s): min= 2048, max= 4007, per=100.00%, avg=3346.33, stdev=1124.45, samples=3 iops : min= 2, max= 3, avg= 2.67, stdev= 0.58, samples=3 write: IOPS=1, BW=1415KiB/s (1449kB/s)(6144KiB/4341msec); 0 zone resets clat (msec): min=205, max=1079, avg=454.07, stdev=323.16 lat (msec): min=205, max=1080, avg=454.25, stdev=323.09 clat percentiles (msec): | 1.00th=[ 205], 5.00th=[ 205], 10.00th=[ 205], 20.00th=[ 271], | 30.00th=[ 271], 40.00th=[ 321], 50.00th=[ 321], 60.00th=[ 338], | 70.00th=[ 510], 80.00th=[ 510], 90.00th=[ 1083], 95.00th=[ 1083], | 99.00th=[ 1083], 99.50th=[ 1083], 99.90th=[ 1083], 99.95th=[ 1083], | 99.99th=[ 1083] bw ( KiB/s): min= 1992, max= 4055, per=61.09%, avg=2528.50, stdev=1017.92, samples=4 iops : min= 1, max= 3, avg= 1.75, stdev= 0.96, samples=4 lat (usec) : 750=8.33% lat (msec) : 2=8.33%, 250=16.67%, 500=50.00%, 750=8.33%, 2000=8.33% cpu : usr=0.00%, sys=13.16%, ctx=140, 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=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=144619: Wed Sep 16 20:53:55 2026 read: IOPS=0, BW=766KiB/s (785kB/s)(5120KiB/6682msec) clat (usec): min=446, max=2473.6k, avg=539454.11, stdev=1085446.75 lat (usec): min=446, max=2473.6k, avg=539455.28, stdev=1085446.90 clat percentiles (usec): | 1.00th=[ 445], 5.00th=[ 445], 10.00th=[ 445], | 20.00th=[ 445], 30.00th=[ 570], 40.00th=[ 570], | 50.00th=[ 1172], 60.00th=[ 1172], 70.00th=[ 221250], | 80.00th=[ 221250], 90.00th=[2466251], 95.00th=[2466251], | 99.00th=[2466251], 99.50th=[2466251], 99.90th=[2466251], | 99.95th=[2466251], 99.99th=[2466251] bw ( KiB/s): min= 2003, max= 5785, per=100.00%, avg=3894.00, stdev=2674.28, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 write: IOPS=1, BW=1073KiB/s (1098kB/s)(7168KiB/6682msec); 0 zone resets clat (msec): min=144, max=810, avg=515.94, stdev=271.42 lat (msec): min=144, max=810, avg=516.05, stdev=271.45 clat percentiles (msec): | 1.00th=[ 146], 5.00th=[ 146], 10.00th=[ 146], 20.00th=[ 207], | 30.00th=[ 401], 40.00th=[ 401], 50.00th=[ 550], 60.00th=[ 743], | 70.00th=[ 743], 80.00th=[ 760], 90.00th=[ 810], 95.00th=[ 810], | 99.00th=[ 810], 99.50th=[ 810], 99.90th=[ 810], 99.95th=[ 810], | 99.99th=[ 810] bw ( KiB/s): min= 1928, max= 2048, per=48.39%, avg=2002.83, stdev=41.48, samples=6 iops : min= 1, max= 2, avg= 1.17, stdev= 0.41, samples=6 lat (usec) : 500=8.33%, 750=8.33% lat (msec) : 2=8.33%, 250=25.00%, 500=8.33%, 750=16.67%, 1000=16.67% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=5.87%, ctx=353, 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=2957KiB/s (3028kB/s), 296KiB/s-1415KiB/s (303kB/s-1449kB/s), io=20.0MiB (20.0MB), run=4341-6927msec WRITE: bw=4139KiB/s (4239kB/s), 806KiB/s-1478KiB/s (825kB/s-1514kB/s), io=28.0MiB (29.4MB), run=4341-6927msec 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=144626: Wed Sep 16 20:54:08 2026 read: IOPS=1, BW=4523KiB/s (4631kB/s)(12.0MiB/2717msec) clat (msec): min=651, max=1105, avg=849.73, stdev=232.46 lat (msec): min=651, max=1105, avg=849.74, stdev=232.46 clat percentiles (msec): | 1.00th=[ 651], 5.00th=[ 651], 10.00th=[ 651], 20.00th=[ 651], | 30.00th=[ 651], 40.00th=[ 793], 50.00th=[ 793], 60.00th=[ 793], | 70.00th=[ 1099], 80.00th=[ 1099], 90.00th=[ 1099], 95.00th=[ 1099], | 99.00th=[ 1099], 99.50th=[ 1099], 99.90th=[ 1099], 99.95th=[ 1099], | 99.99th=[ 1099] bw ( KiB/s): min= 7937, max= 8126, per=100.00%, avg=8031.50, stdev=133.64, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=4.20%, ctx=65, 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=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=144627: Wed Sep 16 20:54:08 2026 read: IOPS=0, BW=1327KiB/s (1359kB/s)(4096KiB/3086msec) clat (nsec): min=479091k, max=479091k, avg=479090977.00, stdev= 0.00 lat (nsec): min=479094k, max=479094k, avg=479093637.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 481], 5.00th=[ 481], 10.00th=[ 481], 20.00th=[ 481], | 30.00th=[ 481], 40.00th=[ 481], 50.00th=[ 481], 60.00th=[ 481], | 70.00th=[ 481], 80.00th=[ 481], 90.00th=[ 481], 95.00th=[ 481], | 99.00th=[ 481], 99.50th=[ 481], 99.90th=[ 481], 99.95th=[ 481], | 99.99th=[ 481] bw ( KiB/s): min= 8159, max= 8159, per=100.00%, avg=8159.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2655KiB/s (2718kB/s)(8192KiB/3086msec); 0 zone resets clat (msec): min=1077, max=1311, avg=1194.44, stdev=165.35 lat (msec): min=1077, max=1311, avg=1194.79, stdev=165.26 clat percentiles (msec): | 1.00th=[ 1083], 5.00th=[ 1083], 10.00th=[ 1083], 20.00th=[ 1083], | 30.00th=[ 1083], 40.00th=[ 1083], 50.00th=[ 1083], 60.00th=[ 1318], | 70.00th=[ 1318], 80.00th=[ 1318], 90.00th=[ 1318], 95.00th=[ 1318], | 99.00th=[ 1318], 99.50th=[ 1318], 99.90th=[ 1318], 99.95th=[ 1318], | 99.99th=[ 1318] bw ( KiB/s): min= 7937, max= 7937, per=84.76%, avg=7937.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 2000=66.67% cpu : usr=0.00%, sys=4.86%, ctx=62, 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=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=144628: Wed Sep 16 20:54:08 2026 write: IOPS=0, BW=3512KiB/s (3596kB/s)(12.0MiB/3499msec); 0 zone resets clat (msec): min=298, max=1643, avg=1134.33, stdev=729.80 lat (msec): min=298, max=1646, avg=1135.69, stdev=730.66 clat percentiles (msec): | 1.00th=[ 300], 5.00th=[ 300], 10.00th=[ 300], 20.00th=[ 300], | 30.00th=[ 300], 40.00th=[ 1469], 50.00th=[ 1469], 60.00th=[ 1469], | 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= 7937, max= 7937, per=84.76%, avg=7937.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 2000=66.67% cpu : usr=0.00%, sys=4.17%, ctx=69, 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=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=144629: Wed Sep 16 20:54:08 2026 write: IOPS=1, BW=5146KiB/s (5269kB/s)(12.0MiB/2388msec); 0 zone resets clat (msec): min=563, max=985, avg=711.63, stdev=237.28 lat (msec): min=563, max=985, avg=712.11, stdev=237.08 clat percentiles (msec): | 1.00th=[ 567], 5.00th=[ 567], 10.00th=[ 567], 20.00th=[ 567], | 30.00th=[ 567], 40.00th=[ 584], 50.00th=[ 584], 60.00th=[ 584], | 70.00th=[ 986], 80.00th=[ 986], 90.00th=[ 986], 95.00th=[ 986], | 99.00th=[ 986], 99.50th=[ 986], 99.90th=[ 986], 99.95th=[ 986], | 99.99th=[ 986] bw ( KiB/s): min= 8126, max= 8159, per=86.96%, avg=8142.50, stdev=23.33, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=66.67%, 1000=33.33% cpu : usr=0.00%, sys=5.70%, ctx=50, 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 Run status group 0 (all jobs): READ: bw=5309KiB/s (5437kB/s), 1327KiB/s-4523KiB/s (1359kB/s-4631kB/s), io=16.0MiB (16.8MB), run=2717-3086msec WRITE: bw=9365KiB/s (9590kB/s), 2655KiB/s-5146KiB/s (2718kB/s-5269kB/s), io=32.0MiB (33.6MB), run=2388-3499msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144630: Wed Sep 16 20:54:08 2026 read: IOPS=1, BW=4981KiB/s (5100kB/s)(12.0MiB/2467msec) clat (msec): min=633, max=851, avg=730.58, stdev=111.12 lat (msec): min=633, max=851, avg=730.58, stdev=111.12 clat percentiles (msec): | 1.00th=[ 634], 5.00th=[ 634], 10.00th=[ 634], 20.00th=[ 634], | 30.00th=[ 634], 40.00th=[ 709], 50.00th=[ 709], 60.00th=[ 709], | 70.00th=[ 852], 80.00th=[ 852], 90.00th=[ 852], 95.00th=[ 852], | 99.00th=[ 852], 99.50th=[ 852], 99.90th=[ 852], 99.95th=[ 852], | 99.99th=[ 852] 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) : 750=66.67%, 1000=33.33% cpu : usr=0.00%, sys=14.23%, ctx=387, 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=144631: Wed Sep 16 20:54:08 2026 read: IOPS=0, BW=1213KiB/s (1242kB/s)(4096KiB/3377msec) clat (nsec): min=855248k, max=855248k, avg=855247734.00, stdev= 0.00 lat (nsec): min=855250k, max=855250k, avg=855250466.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 852], 5.00th=[ 852], 10.00th=[ 852], 20.00th=[ 852], | 30.00th=[ 852], 40.00th=[ 852], 50.00th=[ 852], 60.00th=[ 852], | 70.00th=[ 852], 80.00th=[ 852], 90.00th=[ 852], 95.00th=[ 852], | 99.00th=[ 852], 99.50th=[ 852], 99.90th=[ 852], 99.95th=[ 852], | 99.99th=[ 852] bw ( KiB/s): min= 8159, max= 8159, per=100.00%, avg=8159.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2426KiB/s (2484kB/s)(8192KiB/3377msec); 0 zone resets clat (msec): min=1213, max=1241, avg=1227.66, stdev=19.60 lat (msec): min=1214, max=1241, avg=1227.93, stdev=19.51 clat percentiles (msec): | 1.00th=[ 1217], 5.00th=[ 1217], 10.00th=[ 1217], 20.00th=[ 1217], | 30.00th=[ 1217], 40.00th=[ 1217], 50.00th=[ 1217], 60.00th=[ 1250], | 70.00th=[ 1250], 80.00th=[ 1250], 90.00th=[ 1250], 95.00th=[ 1250], | 99.00th=[ 1250], 99.50th=[ 1250], 99.90th=[ 1250], 99.95th=[ 1250], | 99.99th=[ 1250] bw ( KiB/s): min= 8159, max= 8159, per=93.75%, avg=8159.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 1000=33.33%, 2000=66.67% cpu : usr=0.00%, sys=4.32%, ctx=144, 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=144632: Wed Sep 16 20:54:08 2026 write: IOPS=1, BW=4270KiB/s (4372kB/s)(12.0MiB/2878msec); 0 zone resets clat (msec): min=429, max=1192, avg=893.18, stdev=407.17 lat (msec): min=430, max=1192, avg=893.71, stdev=407.05 clat percentiles (msec): | 1.00th=[ 430], 5.00th=[ 430], 10.00th=[ 430], 20.00th=[ 430], | 30.00th=[ 430], 40.00th=[ 1062], 50.00th=[ 1062], 60.00th=[ 1062], | 70.00th=[ 1200], 80.00th=[ 1200], 90.00th=[ 1200], 95.00th=[ 1200], | 99.00th=[ 1200], 99.50th=[ 1200], 99.90th=[ 1200], 99.95th=[ 1200], | 99.99th=[ 1200] bw ( KiB/s): min= 8110, max= 8110, per=93.19%, avg=8110.00, stdev= 0.00, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 2000=66.67% cpu : usr=0.00%, sys=4.73%, ctx=68, 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=144633: Wed Sep 16 20:54:08 2026 write: IOPS=0, BW=3264KiB/s (3342kB/s)(12.0MiB/3765msec); 0 zone resets clat (msec): min=174, max=2405, avg=1197.03, stdev=1126.79 lat (msec): min=175, max=2405, avg=1198.09, stdev=1126.69 clat percentiles (msec): | 1.00th=[ 176], 5.00th=[ 176], 10.00th=[ 176], 20.00th=[ 176], | 30.00th=[ 176], 40.00th=[ 1011], 50.00th=[ 1011], 60.00th=[ 1011], | 70.00th=[ 2400], 80.00th=[ 2400], 90.00th=[ 2400], 95.00th=[ 2400], | 99.00th=[ 2400], 99.50th=[ 2400], 99.90th=[ 2400], 99.95th=[ 2400], | 99.99th=[ 2400] bw ( KiB/s): min= 8110, max= 8110, per=93.19%, avg=8110.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 250=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=3.32%, ctx=70, 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=4852KiB/s (4968kB/s), 1213KiB/s-4981KiB/s (1242kB/s-5100kB/s), io=16.0MiB (16.8MB), run=2467-3377msec WRITE: bw=8703KiB/s (8912kB/s), 2426KiB/s-4270KiB/s (2484kB/s-4372kB/s), io=32.0MiB (33.6MB), run=2878-3765msec