== sanity test 398b: DIO and buffer IO race ============== 10:46:33 (1788619593) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 6.66938 s, 7.5 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=179463: Sat Sep 5 10:49:17 2026 read: IOPS=10, BW=42.4KiB/s (43.5kB/s)(5992KiB/141211msec) clat (usec): min=45, max=280550, avg=52262.04, stdev=34473.74 lat (usec): min=45, max=280551, avg=52266.06, stdev=34474.30 clat percentiles (usec): | 1.00th=[ 55], 5.00th=[ 12387], 10.00th=[ 19006], 20.00th=[ 25560], | 30.00th=[ 31851], 40.00th=[ 38536], 50.00th=[ 44827], 60.00th=[ 53216], | 70.00th=[ 63177], 80.00th=[ 73925], 90.00th=[ 93848], 95.00th=[120062], | 99.00th=[162530], 99.50th=[189793], 99.90th=[270533], 99.95th=[278922], | 99.99th=[278922] bw ( KiB/s): min= 7, max= 95, per=25.25%, avg=41.92, stdev=17.01, samples=277 iops : min= 1, max= 23, avg= 9.80, stdev= 4.27, samples=277 write: IOPS=11, BW=44.6KiB/s (45.7kB/s)(6296KiB/141211msec); 0 zone resets clat (usec): min=855, max=300409, avg=39782.17, stdev=41294.62 lat (usec): min=856, max=300411, avg=39791.44, stdev=41290.26 clat percentiles (usec): | 1.00th=[ 1090], 5.00th=[ 1221], 10.00th=[ 1598], 20.00th=[ 3752], | 30.00th=[ 8094], 40.00th=[ 19006], 50.00th=[ 28705], 60.00th=[ 38536], | 70.00th=[ 52691], 80.00th=[ 68682], 90.00th=[ 96994], 95.00th=[120062], | 99.00th=[175113], 99.50th=[191890], 99.90th=[283116], 99.95th=[299893], | 99.99th=[299893] bw ( KiB/s): min= 7, max= 151, per=25.25%, avg=43.94, stdev=22.30, samples=278 iops : min= 1, max= 37, avg=10.32, stdev= 5.59, samples=278 lat (usec) : 50=0.13%, 100=1.46%, 250=0.20%, 500=0.03%, 1000=0.13% lat (msec) : 2=6.12%, 4=4.62%, 10=6.18%, 20=7.75%, 50=36.17% lat (msec) : 100=28.48%, 250=8.59%, 500=0.13% cpu : usr=0.07%, sys=4.46%, ctx=6581, majf=0, minf=19 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=179464: Sat Sep 5 10:49:17 2026 read: IOPS=10, BW=42.4KiB/s (43.4kB/s)(5940KiB/140189msec) clat (usec): min=37, max=348839, avg=51426.03, stdev=34367.83 lat (usec): min=37, max=348840, avg=51428.28, stdev=34369.46 clat percentiles (usec): | 1.00th=[ 57], 5.00th=[ 12911], 10.00th=[ 18744], 20.00th=[ 25822], | 30.00th=[ 31327], 40.00th=[ 38011], 50.00th=[ 44303], 60.00th=[ 52167], | 70.00th=[ 60556], 80.00th=[ 73925], 90.00th=[ 91751], 95.00th=[113771], | 99.00th=[162530], 99.50th=[187696], 99.90th=[312476], 99.95th=[350225], | 99.99th=[350225] bw ( KiB/s): min= 7, max= 120, per=25.28%, avg=41.97, stdev=17.49, samples=275 iops : min= 1, max= 30, avg= 9.82, stdev= 4.40, samples=275 write: IOPS=11, BW=45.3KiB/s (46.4kB/s)(6348KiB/140189msec); 0 zone resets clat (usec): min=997, max=364699, avg=40088.02, stdev=41290.26 lat (usec): min=998, max=364701, avg=40089.81, stdev=41290.40 clat percentiles (usec): | 1.00th=[ 1106], 5.00th=[ 1287], 10.00th=[ 1778], 20.00th=[ 4293], | 30.00th=[ 8848], 40.00th=[ 19006], 50.00th=[ 28967], 60.00th=[ 39584], | 70.00th=[ 51643], 80.00th=[ 70779], 90.00th=[ 94897], 95.00th=[119014], | 99.00th=[168821], 99.50th=[196084], 99.90th=[295699], 99.95th=[362808], | 99.99th=[362808] bw ( KiB/s): min= 7, max= 128, per=25.75%, avg=44.81, stdev=21.59, samples=275 iops : min= 1, max= 32, avg=10.53, stdev= 5.45, samples=275 lat (usec) : 50=0.20%, 100=1.27%, 250=0.20%, 500=0.03%, 750=0.10% lat (usec) : 1000=0.03% lat (msec) : 2=5.86%, 4=4.07%, 10=6.58%, 20=8.24%, 50=36.78% lat (msec) : 100=28.29%, 250=8.17%, 500=0.20% cpu : usr=0.06%, sys=4.53%, ctx=6670, majf=0, minf=19 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=179465: Sat Sep 5 10:49:17 2026 read: IOPS=10, BW=43.0KiB/s (44.0kB/s)(6028KiB/140146msec) clat (usec): min=37, max=322845, avg=50974.72, stdev=33966.19 lat (usec): min=37, max=322846, avg=50981.09, stdev=33965.83 clat percentiles (usec): | 1.00th=[ 55], 5.00th=[ 11994], 10.00th=[ 19792], 20.00th=[ 25560], | 30.00th=[ 31065], 40.00th=[ 36439], 50.00th=[ 43254], 60.00th=[ 50594], | 70.00th=[ 61080], 80.00th=[ 71828], 90.00th=[ 91751], 95.00th=[109577], | 99.00th=[173016], 99.50th=[193987], 99.90th=[295699], 99.95th=[320865], | 99.99th=[320865] bw ( KiB/s): min= 7, max= 126, per=25.62%, avg=42.53, stdev=18.52, samples=275 iops : min= 1, max= 31, avg= 9.96, stdev= 4.65, samples=275 write: IOPS=11, BW=44.7KiB/s (45.7kB/s)(6260KiB/140146msec); 0 zone resets clat (usec): min=965, max=294805, avg=40320.41, stdev=43136.85 lat (usec): min=966, max=294807, avg=40329.24, stdev=43140.41 clat percentiles (usec): | 1.00th=[ 1057], 5.00th=[ 1270], 10.00th=[ 1696], 20.00th=[ 3916], | 30.00th=[ 8356], 40.00th=[ 17957], 50.00th=[ 28181], 60.00th=[ 37487], | 70.00th=[ 51643], 80.00th=[ 69731], 90.00th=[ 96994], 95.00th=[125305], | 99.00th=[187696], 99.50th=[225444], 99.90th=[258999], 99.95th=[295699], | 99.99th=[295699] bw ( KiB/s): min= 7, max= 111, per=25.31%, avg=44.03, stdev=20.16, samples=275 iops : min= 1, max= 27, avg=10.35, stdev= 5.08, samples=275 lat (usec) : 50=0.16%, 100=1.60%, 250=0.16%, 500=0.03%, 1000=0.16% lat (msec) : 2=5.76%, 4=4.56%, 10=6.71%, 20=7.52%, 50=37.34% lat (msec) : 100=27.51%, 250=8.30%, 500=0.20% cpu : usr=0.07%, sys=4.36%, ctx=6405, majf=0, minf=19 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=179466: Sat Sep 5 10:49:17 2026 read: IOPS=10, BW=42.1KiB/s (43.1kB/s)(6052KiB/143910msec) clat (usec): min=47, max=423927, avg=53438.96, stdev=37120.57 lat (usec): min=48, max=423929, avg=53440.55, stdev=37121.30 clat percentiles (usec): | 1.00th=[ 58], 5.00th=[ 13960], 10.00th=[ 19530], 20.00th=[ 26346], | 30.00th=[ 31851], 40.00th=[ 39060], 50.00th=[ 45351], 60.00th=[ 53216], | 70.00th=[ 62653], 80.00th=[ 74974], 90.00th=[ 96994], 95.00th=[122160], | 99.00th=[175113], 99.50th=[223347], 99.90th=[291505], 99.95th=[425722], | 99.99th=[425722] bw ( KiB/s): min= 7, max= 103, per=25.46%, avg=42.26, stdev=17.88, samples=279 iops : min= 1, max= 25, avg= 9.89, stdev= 4.50, samples=279 write: IOPS=10, BW=43.3KiB/s (44.4kB/s)(6236KiB/143910msec); 0 zone resets clat (usec): min=922, max=393217, avg=40311.39, stdev=42716.24 lat (usec): min=923, max=393220, avg=40318.43, stdev=42721.20 clat percentiles (usec): | 1.00th=[ 1090], 5.00th=[ 1303], 10.00th=[ 1696], 20.00th=[ 3916], | 30.00th=[ 8291], 40.00th=[ 19006], 50.00th=[ 28967], 60.00th=[ 39060], | 70.00th=[ 51119], 80.00th=[ 69731], 90.00th=[ 95945], 95.00th=[120062], | 99.00th=[185598], 99.50th=[221250], 99.90th=[333448], 99.95th=[392168], | 99.99th=[392168] bw ( KiB/s): min= 7, max= 102, per=24.56%, avg=42.73, stdev=20.23, samples=284 iops : min= 1, max= 25, avg=10.01, stdev= 5.10, samples=284 lat (usec) : 50=0.13%, 100=1.40%, 250=0.07%, 500=0.03%, 1000=0.16% lat (msec) : 2=5.99%, 4=4.17%, 10=6.12%, 20=7.81%, 50=36.85% lat (msec) : 100=28.26%, 250=8.69%, 500=0.33% cpu : usr=0.07%, sys=4.42%, ctx=6501, majf=0, minf=20 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=167KiB/s (171kB/s), 42.1KiB/s-43.0KiB/s (43.1kB/s-44.0kB/s), io=23.4MiB (24.6MB), run=140146-143910msec WRITE: bw=175KiB/s (179kB/s), 43.3KiB/s-45.3KiB/s (44.4kB/s-46.4kB/s), io=24.6MiB (25.7MB), run=140146-143910msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179458: Sat Sep 5 10:49:53 2026 read: IOPS=8, BW=33.1KiB/s (33.9kB/s)(5992KiB/181196msec) clat (msec): min=6, max=842, avg=48.20, stdev=52.60 lat (msec): min=6, max=842, avg=48.20, stdev=52.60 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 21], 40.00th=[ 24], 50.00th=[ 30], 60.00th=[ 37], | 70.00th=[ 51], 80.00th=[ 69], 90.00th=[ 109], 95.00th=[ 153], | 99.00th=[ 236], 99.50th=[ 284], 99.90th=[ 430], 99.95th=[ 844], | 99.99th=[ 844] bw ( KiB/s): min= 7, max= 127, per=25.58%, avg=33.77, stdev=25.52, samples=345 iops : min= 1, max= 31, avg= 7.76, stdev= 6.41, samples=345 write: IOPS=8, BW=34.7KiB/s (35.6kB/s)(6296KiB/181196msec); 0 zone resets clat (msec): min=12, max=431, avg=68.97, stdev=52.52 lat (msec): min=12, max=431, avg=68.98, stdev=52.52 clat percentiles (msec): | 1.00th=[ 18], 5.00th=[ 22], 10.00th=[ 25], 20.00th=[ 29], | 30.00th=[ 35], 40.00th=[ 42], 50.00th=[ 51], 60.00th=[ 64], | 70.00th=[ 82], 80.00th=[ 103], 90.00th=[ 138], 95.00th=[ 174], | 99.00th=[ 247], 99.50th=[ 313], 99.90th=[ 409], 99.95th=[ 430], | 99.99th=[ 430] bw ( KiB/s): min= 7, max= 120, per=25.63%, avg=35.37, stdev=24.63, samples=346 iops : min= 1, max= 30, avg= 8.16, stdev= 6.20, samples=346 lat (msec) : 10=1.56%, 20=14.81%, 50=43.33%, 100=23.76%, 250=15.63% lat (msec) : 500=0.88%, 1000=0.03% cpu : usr=0.06%, sys=1.59%, ctx=4717, 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=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=179459: Sat Sep 5 10:49:54 2026 read: IOPS=8, BW=32.9KiB/s (33.6kB/s)(5940KiB/180795msec) clat (msec): min=5, max=782, avg=46.82, stdev=49.96 lat (msec): min=5, max=782, avg=46.83, stdev=49.95 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 16], | 30.00th=[ 20], 40.00th=[ 23], 50.00th=[ 28], 60.00th=[ 37], | 70.00th=[ 48], 80.00th=[ 71], 90.00th=[ 109], 95.00th=[ 144], | 99.00th=[ 224], 99.50th=[ 251], 99.90th=[ 460], 99.95th=[ 785], | 99.99th=[ 785] bw ( KiB/s): min= 7, max= 128, per=25.44%, avg=33.58, stdev=25.60, samples=343 iops : min= 1, max= 32, avg= 7.72, stdev= 6.45, samples=343 write: IOPS=8, BW=35.1KiB/s (35.0kB/s)(6348KiB/180795msec); 0 zone resets clat (msec): min=13, max=427, avg=69.81, stdev=52.46 lat (msec): min=13, max=427, avg=69.82, stdev=52.46 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 22], 10.00th=[ 25], 20.00th=[ 30], | 30.00th=[ 35], 40.00th=[ 41], 50.00th=[ 50], 60.00th=[ 65], | 70.00th=[ 85], 80.00th=[ 107], 90.00th=[ 140], 95.00th=[ 178], | 99.00th=[ 241], 99.50th=[ 288], 99.90th=[ 376], 99.95th=[ 426], | 99.99th=[ 426] bw ( KiB/s): min= 7, max= 119, per=25.54%, avg=35.25, stdev=24.79, samples=350 iops : min= 1, max= 29, avg= 8.13, stdev= 6.24, samples=350 lat (msec) : 10=1.69%, 20=15.63%, 50=43.26%, 100=21.97%, 250=16.76% lat (msec) : 500=0.65%, 1000=0.03% cpu : usr=0.06%, sys=1.64%, ctx=4789, 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=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=179460: Sat Sep 5 10:49:54 2026 read: IOPS=8, BW=33.3KiB/s (34.1kB/s)(6028KiB/180980msec) clat (msec): min=6, max=424, avg=46.62, stdev=45.80 lat (msec): min=6, max=424, avg=46.62, stdev=45.80 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 21], 40.00th=[ 24], 50.00th=[ 30], 60.00th=[ 38], | 70.00th=[ 48], 80.00th=[ 71], 90.00th=[ 108], 95.00th=[ 142], | 99.00th=[ 218], 99.50th=[ 279], 99.90th=[ 338], 99.95th=[ 426], | 99.99th=[ 426] bw ( KiB/s): min= 7, max= 119, per=25.78%, avg=34.02, stdev=24.45, samples=343 iops : min= 1, max= 29, avg= 7.83, stdev= 6.16, samples=343 write: IOPS=8, BW=34.6KiB/s (35.4kB/s)(6260KiB/180980msec); 0 zone resets clat (msec): min=13, max=798, avg=70.48, stdev=55.80 lat (msec): min=13, max=798, avg=70.49, stdev=55.81 clat percentiles (msec): | 1.00th=[ 16], 5.00th=[ 22], 10.00th=[ 24], 20.00th=[ 30], | 30.00th=[ 36], 40.00th=[ 43], 50.00th=[ 52], 60.00th=[ 64], | 70.00th=[ 85], 80.00th=[ 104], 90.00th=[ 142], 95.00th=[ 176], | 99.00th=[ 259], 99.50th=[ 313], 99.90th=[ 405], 99.95th=[ 802], | 99.99th=[ 802] bw ( KiB/s): min= 7, max= 111, per=24.87%, avg=34.33, stdev=24.40, samples=353 iops : min= 1, max= 27, avg= 7.90, stdev= 6.13, samples=353 lat (msec) : 10=2.51%, 20=14.23%, 50=42.81%, 100=23.83%, 250=15.66% lat (msec) : 500=0.94%, 1000=0.03% cpu : usr=0.06%, sys=1.64%, ctx=4820, 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=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=179461: Sat Sep 5 10:49:54 2026 read: IOPS=8, BW=33.3KiB/s (34.1kB/s)(6052KiB/181685msec) clat (msec): min=6, max=463, avg=47.65, stdev=48.42 lat (msec): min=6, max=463, avg=47.65, stdev=48.42 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 20], 40.00th=[ 24], 50.00th=[ 29], 60.00th=[ 37], | 70.00th=[ 50], 80.00th=[ 71], 90.00th=[ 108], 95.00th=[ 148], | 99.00th=[ 224], 99.50th=[ 247], 99.90th=[ 414], 99.95th=[ 464], | 99.99th=[ 464] bw ( KiB/s): min= 7, max= 119, per=26.29%, avg=34.70, stdev=25.98, samples=339 iops : min= 1, max= 29, avg= 8.00, stdev= 6.54, samples=339 write: IOPS=8, BW=34.3KiB/s (35.1kB/s)(6236KiB/181685msec); 0 zone resets clat (msec): min=13, max=796, avg=69.99, stdev=55.65 lat (msec): min=13, max=796, avg=70.00, stdev=55.65 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 22], 10.00th=[ 25], 20.00th=[ 30], | 30.00th=[ 35], 40.00th=[ 41], 50.00th=[ 50], 60.00th=[ 64], | 70.00th=[ 84], 80.00th=[ 108], 90.00th=[ 144], 95.00th=[ 171], | 99.00th=[ 253], 99.50th=[ 296], 99.90th=[ 397], 99.95th=[ 793], | 99.99th=[ 793] bw ( KiB/s): min= 7, max= 128, per=25.54%, avg=35.25, stdev=24.46, samples=344 iops : min= 1, max= 32, avg= 8.14, stdev= 6.16, samples=344 lat (msec) : 10=1.92%, 20=15.27%, 50=43.20%, 100=22.04%, 250=16.86% lat (msec) : 500=0.68%, 1000=0.03% cpu : usr=0.06%, sys=1.60%, ctx=4879, 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=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=132KiB/s (135kB/s), 32.9KiB/s-33.3KiB/s (33.6kB/s-34.1kB/s), io=23.4MiB (24.6MB), run=180795-181685msec WRITE: bw=138KiB/s (142kB/s), 34.3KiB/s-35.1KiB/s (35.1kB/s-35.0kB/s), io=24.6MiB (25.7MB), run=180795-181685msec 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=179516: Sat Sep 5 10:50:41 2026 read: IOPS=10, BW=169KiB/s (173kB/s)(5920KiB/34998msec) clat (usec): min=35, max=206239, avg=49863.71, stdev=34310.78 lat (usec): min=35, max=206240, avg=49866.68, stdev=34310.85 clat percentiles (usec): | 1.00th=[ 56], 5.00th=[ 70], 10.00th=[ 725], 20.00th=[ 25297], | 30.00th=[ 31851], 40.00th=[ 38011], 50.00th=[ 45351], 60.00th=[ 51643], | 70.00th=[ 58459], 80.00th=[ 69731], 90.00th=[ 93848], 95.00th=[121111], | 99.00th=[173016], 99.50th=[181404], 99.90th=[206570], 99.95th=[206570], | 99.99th=[206570] bw ( KiB/s): min= 61, max= 349, per=25.62%, avg=167.84, stdev=68.37, samples=68 iops : min= 3, max= 21, avg= 9.68, stdev= 4.32, samples=68 write: IOPS=11, BW=182KiB/s (186kB/s)(6368KiB/34998msec); 0 zone resets clat (usec): min=1359, max=201130, avg=41443.36, stdev=38043.92 lat (usec): min=1361, max=201134, avg=41446.24, stdev=38044.71 clat percentiles (usec): | 1.00th=[ 1663], 5.00th=[ 1827], 10.00th=[ 3490], 20.00th=[ 7308], | 30.00th=[ 13304], 40.00th=[ 22414], 50.00th=[ 31065], 60.00th=[ 40633], | 70.00th=[ 54789], 80.00th=[ 68682], 90.00th=[ 95945], 95.00th=[120062], | 99.00th=[156238], 99.50th=[185598], 99.90th=[200279], 99.95th=[200279], | 99.99th=[200279] bw ( KiB/s): min= 31, max= 415, per=26.72%, avg=184.07, stdev=75.23, samples=67 iops : min= 1, max= 25, avg=10.72, stdev= 4.73, samples=67 lat (usec) : 50=0.39%, 100=3.39%, 250=0.78%, 500=0.13%, 750=0.13% lat (msec) : 2=2.99%, 4=2.99%, 10=7.03%, 20=8.85%, 50=35.16% lat (msec) : 100=29.30%, 250=8.85% cpu : usr=0.08%, sys=5.04%, ctx=1634, 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=179517: Sat Sep 5 10:50:41 2026 read: IOPS=10, BW=161KiB/s (164kB/s)(5744KiB/35787msec) clat (usec): min=44, max=197287, avg=50594.75, stdev=36335.03 lat (usec): min=44, max=197289, avg=50595.96, stdev=36335.03 clat percentiles (usec): | 1.00th=[ 56], 5.00th=[ 77], 10.00th=[ 14615], 20.00th=[ 23462], | 30.00th=[ 29230], 40.00th=[ 35914], 50.00th=[ 42730], 60.00th=[ 49546], | 70.00th=[ 59507], 80.00th=[ 71828], 90.00th=[101188], 95.00th=[128451], | 99.00th=[164627], 99.50th=[179307], 99.90th=[198181], 99.95th=[198181], | 99.99th=[198181] bw ( KiB/s): min= 30, max= 320, per=24.81%, avg=162.48, stdev=69.26, samples=69 iops : min= 1, max= 20, avg= 9.33, stdev= 4.37, samples=69 write: IOPS=11, BW=183KiB/s (187kB/s)(6544KiB/35787msec); 0 zone resets clat (usec): min=1405, max=170715, avg=42930.92, stdev=39457.83 lat (usec): min=1407, max=170717, avg=42933.57, stdev=39458.18 clat percentiles (usec): | 1.00th=[ 1582], 5.00th=[ 2008], 10.00th=[ 2966], 20.00th=[ 5997], | 30.00th=[ 11863], 40.00th=[ 21890], 50.00th=[ 32113], 60.00th=[ 42730], | 70.00th=[ 57410], 80.00th=[ 76022], 90.00th=[102237], 95.00th=[119014], | 99.00th=[152044], 99.50th=[156238], 99.90th=[170918], 99.95th=[170918], | 99.99th=[170918] bw ( KiB/s): min= 31, max= 412, per=26.49%, avg=182.50, stdev=84.27, samples=70 iops : min= 1, max= 25, avg=10.61, stdev= 5.30, samples=70 lat (usec) : 50=0.13%, 100=2.99%, 250=0.39%, 500=0.13% lat (msec) : 2=2.73%, 4=4.95%, 10=6.64%, 20=8.59%, 50=36.33% lat (msec) : 100=26.30%, 250=10.81% cpu : usr=0.08%, sys=5.01%, ctx=1710, 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=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=179518: Sat Sep 5 10:50:41 2026 read: IOPS=10, BW=171KiB/s (175kB/s)(6256KiB/36552msec) clat (usec): min=47, max=259913, avg=53301.41, stdev=35614.45 lat (usec): min=48, max=259914, avg=53302.65, stdev=35614.44 clat percentiles (usec): | 1.00th=[ 61], 5.00th=[ 172], 10.00th=[ 18744], 20.00th=[ 24249], | 30.00th=[ 31327], 40.00th=[ 36963], 50.00th=[ 47973], 60.00th=[ 56361], | 70.00th=[ 69731], 80.00th=[ 80217], 90.00th=[ 99091], 95.00th=[108528], | 99.00th=[175113], 99.50th=[219153], 99.90th=[258999], 99.95th=[258999], | 99.99th=[258999] bw ( KiB/s): min= 31, max= 382, per=26.13%, avg=171.17, stdev=67.64, samples=71 iops : min= 1, max= 23, avg= 9.90, stdev= 4.23, samples=71 write: IOPS=10, BW=165KiB/s (169kB/s)(6032KiB/36552msec); 0 zone resets clat (usec): min=1329, max=231830, avg=41553.55, stdev=40806.27 lat (usec): min=1331, max=231833, avg=41559.38, stdev=40809.28 clat percentiles (usec): | 1.00th=[ 1532], 5.00th=[ 1795], 10.00th=[ 3326], 20.00th=[ 6521], | 30.00th=[ 12125], 40.00th=[ 18744], 50.00th=[ 27919], 60.00th=[ 39584], | 70.00th=[ 53740], 80.00th=[ 72877], 90.00th=[ 99091], 95.00th=[126354], | 99.00th=[164627], 99.50th=[193987], 99.90th=[231736], 99.95th=[231736], | 99.99th=[231736] bw ( KiB/s): min= 63, max= 382, per=23.59%, avg=162.52, stdev=72.76, samples=71 iops : min= 3, max= 23, avg= 9.35, stdev= 4.57, samples=71 lat (usec) : 50=0.13%, 100=1.95%, 250=0.65%, 500=0.26%, 750=0.13% lat (msec) : 2=3.12%, 4=3.39%, 10=7.29%, 20=8.85%, 50=34.64% lat (msec) : 100=29.95%, 250=9.51%, 500=0.13% cpu : usr=0.05%, sys=4.91%, ctx=1756, 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=179519: Sat Sep 5 10:50:41 2026 read: IOPS=10, BW=167KiB/s (171kB/s)(6032KiB/36065msec) clat (usec): min=41, max=234865, avg=49937.49, stdev=34594.21 lat (usec): min=41, max=234866, avg=49944.07, stdev=34589.72 clat percentiles (usec): | 1.00th=[ 50], 5.00th=[ 64], 10.00th=[ 1029], 20.00th=[ 25035], | 30.00th=[ 30802], 40.00th=[ 37487], 50.00th=[ 45351], 60.00th=[ 53216], | 70.00th=[ 62653], 80.00th=[ 70779], 90.00th=[ 94897], 95.00th=[110625], | 99.00th=[160433], 99.50th=[208667], 99.90th=[233833], 99.95th=[233833], | 99.99th=[233833] bw ( KiB/s): min= 31, max= 414, per=25.71%, avg=168.42, stdev=70.80, samples=69 iops : min= 1, max= 25, avg= 9.72, stdev= 4.43, samples=69 write: IOPS=10, BW=173KiB/s (178kB/s)(6256KiB/36065msec); 0 zone resets clat (usec): min=1304, max=202839, avg=43980.98, stdev=43916.42 lat (usec): min=1306, max=202841, avg=43983.77, stdev=43915.89 clat percentiles (usec): | 1.00th=[ 1582], 5.00th=[ 1876], 10.00th=[ 3130], 20.00th=[ 7177], | 30.00th=[ 12911], 40.00th=[ 20841], 50.00th=[ 29754], 60.00th=[ 40633], | 70.00th=[ 56361], 80.00th=[ 77071], 90.00th=[108528], 95.00th=[139461], | 99.00th=[183501], 99.50th=[196084], 99.90th=[202376], 99.95th=[202376], | 99.99th=[202376] bw ( KiB/s): min= 62, max= 319, per=25.02%, avg=172.39, stdev=61.03, samples=70 iops : min= 3, max= 19, avg= 9.97, stdev= 3.84, samples=70 lat (usec) : 50=0.52%, 100=3.52%, 250=0.52%, 750=0.13%, 1000=0.13% lat (msec) : 2=3.65%, 4=3.91%, 10=6.77%, 20=8.20%, 50=34.24% lat (msec) : 100=27.73%, 250=10.68% cpu : usr=0.04%, sys=4.87%, ctx=1771, 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=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=655KiB/s (671kB/s), 161KiB/s-171KiB/s (164kB/s-175kB/s), io=23.4MiB (24.5MB), run=34998-36552msec WRITE: bw=689KiB/s (706kB/s), 165KiB/s-183KiB/s (169kB/s-187kB/s), io=24.6MiB (25.8MB), run=34998-36552msec fio: pid=179511, err=5/file:backend.c:481, func=full resid, error=Input/output error rand-rw: (groupid=0, jobs=1): err= 5 (file:backend.c:481, func=full resid, error=Input/output error): pid=179511: Sat Sep 5 10:50:56 2026 read: IOPS=7, BW=116KiB/s (119kB/s)(5824KiB/50250msec) clat (msec): min=8, max=250, avg=51.79, stdev=39.77 lat (msec): min=8, max=250, avg=51.80, stdev=39.77 clat percentiles (msec): | 1.00th=[ 11], 5.00th=[ 15], 10.00th=[ 18], 20.00th=[ 23], | 30.00th=[ 27], 40.00th=[ 33], 50.00th=[ 39], 60.00th=[ 47], | 70.00th=[ 56], 80.00th=[ 80], 90.00th=[ 107], 95.00th=[ 133], | 99.00th=[ 203], 99.50th=[ 236], 99.90th=[ 251], 99.95th=[ 251], | 99.99th=[ 251] bw ( KiB/s): min= 30, max= 384, per=26.58%, avg=122.53, stdev=73.81, samples=93 iops : min= 1, max= 24, avg= 6.88, stdev= 4.68, samples=93 write: IOPS=7, BW=125KiB/s (128kB/s)(6304KiB/50250msec); 0 zone resets clat (msec): min=16, max=409, avg=79.46, stdev=56.10 lat (msec): min=16, max=409, avg=79.46, stdev=56.10 clat percentiles (msec): | 1.00th=[ 21], 5.00th=[ 28], 10.00th=[ 33], 20.00th=[ 39], | 30.00th=[ 45], 40.00th=[ 52], 50.00th=[ 63], 60.00th=[ 72], | 70.00th=[ 90], 80.00th=[ 112], 90.00th=[ 150], 95.00th=[ 201], | 99.00th=[ 268], 99.50th=[ 355], 99.90th=[ 409], 99.95th=[ 409], | 99.99th=[ 409] bw ( KiB/s): min= 30, max= 317, per=26.06%, avg=126.37, stdev=67.24, samples=98 iops : min= 1, max= 19, avg= 7.11, stdev= 4.24, samples=98 lat (msec) : 10=0.13%, 20=7.38%, 50=42.42%, 100=31.75%, 250=17.13% lat (msec) : 500=1.05% cpu : usr=0.05%, sys=1.56%, ctx=1194, majf=0, minf=19 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=365,394,0,0 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=179512: Sat Sep 5 10:50:56 2026 read: IOPS=6, BW=111KiB/s (114kB/s)(5744KiB/51735msec) clat (msec): min=7, max=387, avg=56.67, stdev=53.49 lat (msec): min=7, max=387, avg=56.67, stdev=53.49 clat percentiles (msec): | 1.00th=[ 12], 5.00th=[ 14], 10.00th=[ 18], 20.00th=[ 23], | 30.00th=[ 27], 40.00th=[ 33], 50.00th=[ 38], 60.00th=[ 45], | 70.00th=[ 61], 80.00th=[ 79], 90.00th=[ 128], 95.00th=[ 169], | 99.00th=[ 271], 99.50th=[ 363], 99.90th=[ 388], 99.95th=[ 388], | 99.99th=[ 388] bw ( KiB/s): min= 29, max= 380, per=25.35%, avg=116.85, stdev=73.28, samples=96 iops : min= 1, max= 23, avg= 6.50, stdev= 4.63, samples=96 write: IOPS=7, BW=126KiB/s (130kB/s)(6544KiB/51735msec); 0 zone resets clat (msec): min=16, max=275, avg=76.45, stdev=50.28 lat (msec): min=16, max=275, avg=76.45, stdev=50.28 clat percentiles (msec): | 1.00th=[ 19], 5.00th=[ 26], 10.00th=[ 30], 20.00th=[ 38], | 30.00th=[ 43], 40.00th=[ 51], 50.00th=[ 62], 60.00th=[ 74], | 70.00th=[ 87], 80.00th=[ 108], 90.00th=[ 146], 95.00th=[ 176], | 99.00th=[ 253], 99.50th=[ 264], 99.90th=[ 275], 99.95th=[ 275], | 99.99th=[ 275] bw ( KiB/s): min= 31, max= 412, per=26.83%, avg=130.14, stdev=69.85, samples=98 iops : min= 1, max= 25, avg= 7.36, stdev= 4.42, samples=98 lat (msec) : 10=0.26%, 20=7.29%, 50=42.45%, 100=31.38%, 250=17.45% lat (msec) : 500=1.17% cpu : usr=0.04%, sys=1.61%, ctx=1144, 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=179513: Sat Sep 5 10:50:56 2026 read: IOPS=7, BW=123KiB/s (126kB/s)(6256KiB/51034msec) clat (msec): min=7, max=238, avg=54.70, stdev=45.04 lat (msec): min=7, max=238, avg=54.70, stdev=45.04 clat percentiles (msec): | 1.00th=[ 11], 5.00th=[ 15], 10.00th=[ 18], 20.00th=[ 23], | 30.00th=[ 28], 40.00th=[ 33], 50.00th=[ 41], 60.00th=[ 48], | 70.00th=[ 60], 80.00th=[ 75], 90.00th=[ 121], 95.00th=[ 165], | 99.00th=[ 218], 99.50th=[ 226], 99.90th=[ 239], 99.95th=[ 239], | 99.99th=[ 239] bw ( KiB/s): min= 31, max= 412, per=27.42%, avg=126.41, stdev=75.87, samples=97 iops : min= 1, max= 25, avg= 7.11, stdev= 4.80, samples=97 write: IOPS=7, BW=118KiB/s (121kB/s)(6032KiB/51034msec); 0 zone resets clat (msec): min=16, max=293, avg=78.30, stdev=47.99 lat (msec): min=16, max=293, avg=78.31, stdev=47.98 clat percentiles (msec): | 1.00th=[ 20], 5.00th=[ 27], 10.00th=[ 32], 20.00th=[ 41], | 30.00th=[ 47], 40.00th=[ 56], 50.00th=[ 66], 60.00th=[ 77], | 70.00th=[ 92], 80.00th=[ 111], 90.00th=[ 142], 95.00th=[ 176], | 99.00th=[ 247], 99.50th=[ 271], 99.90th=[ 296], 99.95th=[ 296], | 99.99th=[ 296] bw ( KiB/s): min= 30, max= 352, per=23.89%, avg=115.86, stdev=65.05, samples=100 iops : min= 1, max= 22, avg= 6.45, stdev= 4.12, samples=100 lat (msec) : 10=0.39%, 20=8.20%, 50=41.41%, 100=31.25%, 250=18.36% lat (msec) : 500=0.39% cpu : usr=0.05%, sys=1.67%, ctx=1202, 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=179514: Sat Sep 5 10:50:56 2026 read: IOPS=7, BW=119KiB/s (122kB/s)(6032KiB/50754msec) clat (msec): min=10, max=373, avg=58.21, stdev=48.46 lat (msec): min=10, max=373, avg=58.21, stdev=48.46 clat percentiles (msec): | 1.00th=[ 13], 5.00th=[ 16], 10.00th=[ 20], 20.00th=[ 26], | 30.00th=[ 31], 40.00th=[ 36], 50.00th=[ 42], 60.00th=[ 51], | 70.00th=[ 63], 80.00th=[ 82], 90.00th=[ 121], 95.00th=[ 161], | 99.00th=[ 239], 99.50th=[ 317], 99.90th=[ 372], 99.95th=[ 372], | 99.99th=[ 372] bw ( KiB/s): min= 31, max= 379, per=26.34%, avg=121.41, stdev=70.01, samples=97 iops : min= 1, max= 23, avg= 6.80, stdev= 4.43, samples=97 write: IOPS=7, BW=123KiB/s (126kB/s)(6256KiB/50754msec); 0 zone resets clat (msec): min=18, max=337, avg=73.36, stdev=46.25 lat (msec): min=18, max=337, avg=73.37, stdev=46.25 clat percentiles (msec): | 1.00th=[ 21], 5.00th=[ 27], 10.00th=[ 32], 20.00th=[ 39], | 30.00th=[ 45], 40.00th=[ 54], 50.00th=[ 62], 60.00th=[ 70], | 70.00th=[ 86], 80.00th=[ 102], 90.00th=[ 130], 95.00th=[ 167], | 99.00th=[ 253], 99.50th=[ 266], 99.90th=[ 338], 99.95th=[ 338], | 99.99th=[ 338] bw ( KiB/s): min= 30, max= 412, per=25.87%, avg=125.47, stdev=70.45, samples=98 iops : min= 1, max= 25, avg= 7.05, stdev= 4.47, samples=98 lat (msec) : 20=6.12%, 50=41.54%, 100=34.24%, 250=17.32%, 500=0.78% cpu : usr=0.05%, sys=1.64%, ctx=1212, 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=461KiB/s (472kB/s), 111KiB/s-123KiB/s (114kB/s-126kB/s), io=23.3MiB (24.4MB), run=50250-51735msec WRITE: bw=486KiB/s (498kB/s), 118KiB/s-126KiB/s (121kB/s-130kB/s), io=24.5MiB (25.7MB), run=50250-51735msec 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=179531: Sat Sep 5 10:51:11 2026 read: IOPS=1, BW=1234KiB/s (1264kB/s)(7168KiB/5807msec) clat (usec): min=557, max=3408.3k, avg=667742.68, stdev=1217104.58 lat (usec): min=558, max=3408.3k, avg=667744.06, stdev=1217104.50 clat percentiles (usec): | 1.00th=[ 562], 5.00th=[ 562], 10.00th=[ 562], | 20.00th=[ 152044], 30.00th=[ 179307], 40.00th=[ 179307], | 50.00th=[ 193987], 60.00th=[ 254804], 70.00th=[ 254804], | 80.00th=[ 484443], 90.00th=[3405775], 95.00th=[3405775], | 99.00th=[3405775], 99.50th=[3405775], 99.90th=[3405775], | 99.95th=[3405775], 99.99th=[3405775] bw ( KiB/s): min= 1414, max= 4031, per=81.78%, avg=2300.60, stdev=1002.34, samples=5 iops : min= 1, max= 3, avg= 1.40, stdev= 0.89, samples=5 write: IOPS=0, BW=882KiB/s (903kB/s)(5120KiB/5807msec); 0 zone resets clat (msec): min=171, max=262, avg=216.69, stdev=32.33 lat (msec): min=171, max=262, avg=216.93, stdev=32.32 clat percentiles (msec): | 1.00th=[ 171], 5.00th=[ 171], 10.00th=[ 171], 20.00th=[ 171], | 30.00th=[ 213], 40.00th=[ 213], 50.00th=[ 218], 60.00th=[ 218], | 70.00th=[ 220], 80.00th=[ 220], 90.00th=[ 264], 95.00th=[ 264], | 99.00th=[ 264], 99.50th=[ 264], 99.90th=[ 264], 99.95th=[ 264], | 99.99th=[ 264] bw ( KiB/s): min= 2015, max= 4023, per=68.18%, avg=2685.67, stdev=1158.17, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 lat (usec) : 750=8.33% lat (msec) : 250=58.33%, 500=25.00%, >=2000=8.33% cpu : usr=0.00%, sys=13.14%, ctx=712, 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=179532: Sat Sep 5 10:51:11 2026 read: IOPS=0, BW=281KiB/s (288kB/s)(2048KiB/7279msec) clat (usec): min=794, max=184217, avg=92506.07, stdev=129699.41 lat (usec): min=795, max=184219, avg=92507.72, stdev=129700.61 clat percentiles (usec): | 1.00th=[ 799], 5.00th=[ 799], 10.00th=[ 799], 20.00th=[ 799], | 30.00th=[ 799], 40.00th=[ 799], 50.00th=[ 799], 60.00th=[183501], | 70.00th=[183501], 80.00th=[183501], 90.00th=[183501], 95.00th=[183501], | 99.00th=[183501], 99.50th=[183501], 99.90th=[183501], 99.95th=[183501], | 99.99th=[183501] bw ( KiB/s): min= 1412, max= 2027, per=61.13%, avg=1719.50, stdev=434.87, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1407KiB/s (1441kB/s)(10.0MiB/7279msec); 0 zone resets clat (msec): min=75, max=3858, avg=696.20, stdev=1154.47 lat (msec): min=75, max=3858, avg=696.36, stdev=1154.45 clat percentiles (msec): | 1.00th=[ 75], 5.00th=[ 75], 10.00th=[ 75], 20.00th=[ 131], | 30.00th=[ 136], 40.00th=[ 146], 50.00th=[ 146], 60.00th=[ 275], | 70.00th=[ 443], 80.00th=[ 701], 90.00th=[ 1053], 95.00th=[ 3842], | 99.00th=[ 3842], 99.50th=[ 3842], 99.90th=[ 3842], 99.95th=[ 3842], | 99.99th=[ 3842] bw ( KiB/s): min= 2011, max= 4063, per=71.85%, avg=2830.20, stdev=1110.85, samples=5 iops : min= 1, max= 3, avg= 1.80, stdev= 1.10, samples=5 lat (usec) : 1000=8.33% lat (msec) : 100=8.33%, 250=41.67%, 500=16.67%, 750=8.33%, 2000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=10.98%, ctx=107, 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=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=179533: Sat Sep 5 10:51:11 2026 read: IOPS=1, BW=1038KiB/s (1063kB/s)(6144KiB/5918msec) clat (usec): min=688, max=241304, avg=82014.25, stdev=105805.13 lat (usec): min=690, max=241305, avg=82015.41, stdev=105805.20 clat percentiles (usec): | 1.00th=[ 693], 5.00th=[ 693], 10.00th=[ 693], 20.00th=[ 865], | 30.00th=[ 865], 40.00th=[ 1401], 50.00th=[ 1401], 60.00th=[ 63177], | 70.00th=[185598], 80.00th=[185598], 90.00th=[242222], 95.00th=[242222], | 99.00th=[242222], 99.50th=[242222], 99.90th=[242222], 99.95th=[242222], | 99.99th=[242222] bw ( KiB/s): min= 1996, max= 4031, per=100.00%, avg=3350.00, stdev=1172.61, samples=3 iops : min= 1, max= 3, avg= 2.33, stdev= 1.15, samples=3 write: IOPS=1, BW=1038KiB/s (1063kB/s)(6144KiB/5918msec); 0 zone resets clat (msec): min=208, max=3731, avg=885.60, stdev=1395.90 lat (msec): min=208, max=3732, avg=885.95, stdev=1396.29 clat percentiles (msec): | 1.00th=[ 209], 5.00th=[ 209], 10.00th=[ 209], 20.00th=[ 275], | 30.00th=[ 275], 40.00th=[ 338], 50.00th=[ 338], 60.00th=[ 355], | 70.00th=[ 405], 80.00th=[ 405], 90.00th=[ 3742], 95.00th=[ 3742], | 99.00th=[ 3742], 99.50th=[ 3742], 99.90th=[ 3742], 99.95th=[ 3742], | 99.99th=[ 3742] bw ( KiB/s): min= 1462, max= 3992, per=58.41%, avg=2300.60, stdev=975.52, samples=5 iops : min= 1, max= 3, avg= 1.40, stdev= 0.89, samples=5 lat (usec) : 750=8.33%, 1000=8.33% lat (msec) : 2=8.33%, 100=8.33%, 250=25.00%, 500=33.33%, >=2000=8.33% cpu : usr=0.00%, sys=8.45%, ctx=163, 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=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=179534: Sat Sep 5 10:51:11 2026 read: IOPS=0, BW=912KiB/s (934kB/s)(5120KiB/5614msec) clat (usec): min=317, max=262900, avg=104412.19, stdev=142413.38 lat (usec): min=317, max=262901, avg=104413.24, stdev=142413.45 clat percentiles (usec): | 1.00th=[ 318], 5.00th=[ 318], 10.00th=[ 318], 20.00th=[ 318], | 30.00th=[ 429], 40.00th=[ 429], 50.00th=[ 506], 60.00th=[ 506], | 70.00th=[256902], 80.00th=[256902], 90.00th=[263193], 95.00th=[263193], | 99.00th=[263193], 99.50th=[263193], 99.90th=[263193], 99.95th=[263193], | 99.99th=[263193] bw ( KiB/s): min= 2015, max= 6035, per=100.00%, avg=4025.00, stdev=2842.57, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 write: IOPS=1, BW=1277KiB/s (1307kB/s)(7168KiB/5614msec); 0 zone resets clat (msec): min=108, max=3525, avg=709.49, stdev=1250.24 lat (msec): min=108, max=3525, avg=709.59, stdev=1250.23 clat percentiles (msec): | 1.00th=[ 109], 5.00th=[ 109], 10.00th=[ 109], 20.00th=[ 110], | 30.00th=[ 117], 40.00th=[ 117], 50.00th=[ 249], 60.00th=[ 380], | 70.00th=[ 380], 80.00th=[ 477], 90.00th=[ 3540], 95.00th=[ 3540], | 99.00th=[ 3540], 99.50th=[ 3540], 99.90th=[ 3540], 99.95th=[ 3540], | 99.99th=[ 3540] bw ( KiB/s): min= 1422, max= 4039, per=60.21%, avg=2371.75, stdev=1145.89, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 lat (usec) : 500=16.67%, 750=8.33% lat (msec) : 250=33.33%, 500=33.33%, >=2000=8.33% cpu : usr=0.04%, sys=11.87%, ctx=137, 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=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=2814KiB/s (2881kB/s), 281KiB/s-1234KiB/s (288kB/s-1264kB/s), io=20.0MiB (20.0MB), run=5614-7279msec WRITE: bw=3939KiB/s (4034kB/s), 882KiB/s-1407KiB/s (903kB/s-1441kB/s), io=28.0MiB (29.4MB), run=5614-7279msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179536: Sat Sep 5 10:51:12 2026 read: IOPS=0, BW=935KiB/s (958kB/s)(7168KiB/7664msec) clat (msec): min=61, max=3261, avg=992.22, stdev=1259.80 lat (msec): min=61, max=3261, avg=992.22, stdev=1259.80 clat percentiles (msec): | 1.00th=[ 63], 5.00th=[ 63], 10.00th=[ 63], 20.00th=[ 93], | 30.00th=[ 259], 40.00th=[ 259], 50.00th=[ 359], 60.00th=[ 642], | 70.00th=[ 642], 80.00th=[ 2265], 90.00th=[ 3272], 95.00th=[ 3272], | 99.00th=[ 3272], 99.50th=[ 3272], 99.90th=[ 3272], 99.95th=[ 3272], | 99.99th=[ 3272] bw ( KiB/s): min= 1992, max= 4079, per=94.88%, avg=2535.25, stdev=1029.37, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 write: IOPS=0, BW=668KiB/s (684kB/s)(5120KiB/7664msec); 0 zone resets clat (msec): min=45, max=271, avg=118.95, stdev=88.58 lat (msec): min=45, max=271, avg=119.11, stdev=88.57 clat percentiles (msec): | 1.00th=[ 45], 5.00th=[ 45], 10.00th=[ 45], 20.00th=[ 45], | 30.00th=[ 82], 40.00th=[ 82], 50.00th=[ 83], 60.00th=[ 83], | 70.00th=[ 115], 80.00th=[ 115], 90.00th=[ 271], 95.00th=[ 271], | 99.00th=[ 271], 99.50th=[ 271], 99.90th=[ 271], 99.95th=[ 271], | 99.99th=[ 271] bw ( KiB/s): min= 2031, max= 2031, per=54.29%, avg=2031.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 50=8.33%, 100=33.33%, 250=8.33%, 500=25.00%, 750=8.33% lat (msec) : >=2000=16.67% cpu : usr=0.00%, sys=2.30%, ctx=53, 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=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=179537: Sat Sep 5 10:51:12 2026 read: IOPS=0, BW=273KiB/s (280kB/s)(2048KiB/7494msec) clat (msec): min=159, max=463, avg=311.78, stdev=214.70 lat (msec): min=159, max=463, avg=311.78, stdev=214.70 clat percentiles (msec): | 1.00th=[ 161], 5.00th=[ 161], 10.00th=[ 161], 20.00th=[ 161], | 30.00th=[ 161], 40.00th=[ 161], 50.00th=[ 161], 60.00th=[ 464], | 70.00th=[ 464], 80.00th=[ 464], 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= 1689, max= 2000, per=69.03%, avg=1844.50, stdev=219.91, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1366KiB/s (1399kB/s)(10.0MiB/7494msec); 0 zone resets clat (msec): min=80, max=4288, avg=680.34, stdev=1274.36 lat (msec): min=80, max=4288, avg=680.41, stdev=1274.36 clat percentiles (msec): | 1.00th=[ 81], 5.00th=[ 81], 10.00th=[ 81], 20.00th=[ 108], | 30.00th=[ 207], 40.00th=[ 218], 50.00th=[ 313], 60.00th=[ 330], | 70.00th=[ 355], 80.00th=[ 426], 90.00th=[ 481], 95.00th=[ 4279], | 99.00th=[ 4279], 99.50th=[ 4279], 99.90th=[ 4279], 99.95th=[ 4279], | 99.99th=[ 4279] bw ( KiB/s): min= 2000, max= 6119, per=86.93%, avg=3252.00, stdev=1829.46, samples=5 iops : min= 1, max= 5, avg= 2.20, stdev= 1.79, samples=5 lat (msec) : 100=8.33%, 250=33.33%, 500=50.00%, >=2000=8.33% cpu : usr=0.00%, sys=5.20%, ctx=121, 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=179538: Sat Sep 5 10:51:12 2026 read: IOPS=0, BW=900KiB/s (922kB/s)(6144KiB/6823msec) clat (msec): min=59, max=539, avg=203.77, stdev=169.04 lat (msec): min=59, max=539, avg=203.77, stdev=169.04 clat percentiles (msec): | 1.00th=[ 60], 5.00th=[ 60], 10.00th=[ 60], 20.00th=[ 148], | 30.00th=[ 148], 40.00th=[ 157], 50.00th=[ 157], 60.00th=[ 159], | 70.00th=[ 161], 80.00th=[ 161], 90.00th=[ 542], 95.00th=[ 542], | 99.00th=[ 542], 99.50th=[ 542], 99.90th=[ 542], 99.95th=[ 542], | 99.99th=[ 542] bw ( KiB/s): min= 2031, max= 4000, per=100.00%, avg=2690.00, stdev=1134.50, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 write: IOPS=0, BW=900KiB/s (922kB/s)(6144KiB/6823msec); 0 zone resets clat (msec): min=90, max=4382, avg=925.69, stdev=1697.32 lat (msec): min=90, max=4382, avg=926.12, stdev=1697.16 clat percentiles (msec): | 1.00th=[ 91], 5.00th=[ 91], 10.00th=[ 91], 20.00th=[ 117], | 30.00th=[ 117], 40.00th=[ 271], 50.00th=[ 271], 60.00th=[ 288], | 70.00th=[ 409], 80.00th=[ 409], 90.00th=[ 4396], 95.00th=[ 4396], | 99.00th=[ 4396], 99.50th=[ 4396], 99.90th=[ 4396], 99.95th=[ 4396], | 99.99th=[ 4396] bw ( KiB/s): min= 1835, max= 2048, per=53.21%, avg=1990.60, stdev=88.84, samples=5 iops : min= 1, max= 2, avg= 1.20, stdev= 0.45, samples=5 lat (msec) : 100=16.67%, 250=41.67%, 500=25.00%, 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=4.09%, ctx=109, 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=179539: Sat Sep 5 10:51:12 2026 read: IOPS=0, BW=775KiB/s (793kB/s)(5120KiB/6608msec) clat (msec): min=92, max=612, avg=223.96, stdev=220.42 lat (msec): min=92, max=612, avg=223.96, stdev=220.42 clat percentiles (msec): | 1.00th=[ 93], 5.00th=[ 93], 10.00th=[ 93], 20.00th=[ 93], | 30.00th=[ 109], 40.00th=[ 109], 50.00th=[ 115], 60.00th=[ 115], | 70.00th=[ 192], 80.00th=[ 192], 90.00th=[ 609], 95.00th=[ 609], | 99.00th=[ 609], 99.50th=[ 609], 99.90th=[ 609], 99.95th=[ 609], | 99.99th=[ 609] bw ( KiB/s): min= 2039, max= 6095, per=100.00%, avg=4067.00, stdev=2868.03, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 write: IOPS=1, BW=1085KiB/s (1111kB/s)(7168KiB/6608msec); 0 zone resets clat (msec): min=106, max=3580, avg=772.77, stdev=1250.82 lat (msec): min=106, max=3580, avg=772.85, stdev=1250.80 clat percentiles (msec): | 1.00th=[ 107], 5.00th=[ 107], 10.00th=[ 107], 20.00th=[ 136], | 30.00th=[ 211], 40.00th=[ 211], 50.00th=[ 313], 60.00th=[ 456], | 70.00th=[ 456], 80.00th=[ 609], 90.00th=[ 3574], 95.00th=[ 3574], | 99.00th=[ 3574], 99.50th=[ 3574], 99.90th=[ 3574], 99.95th=[ 3574], | 99.99th=[ 3574] bw ( KiB/s): min= 1698, max= 2043, per=51.71%, avg=1934.40, stdev=152.76, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 lat (msec) : 100=8.33%, 250=50.00%, 500=16.67%, 750=16.67%, >=2000=8.33% cpu : usr=0.00%, sys=5.66%, ctx=99, 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=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=2672KiB/s (2736kB/s), 273KiB/s-935KiB/s (280kB/s-958kB/s), io=20.0MiB (20.0MB), run=6608-7664msec WRITE: bw=3741KiB/s (3831kB/s), 668KiB/s-1366KiB/s (684kB/s-1399kB/s), io=28.0MiB (29.4MB), run=6608-7664msec 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=179546: Sat Sep 5 10:51:26 2026 read: IOPS=0, BW=3171KiB/s (3247kB/s)(12.0MiB/3875msec) clat (msec): min=1170, max=1267, avg=1228.26, stdev=50.80 lat (msec): min=1170, max=1267, avg=1228.26, stdev=50.80 clat percentiles (msec): | 1.00th=[ 1167], 5.00th=[ 1167], 10.00th=[ 1167], 20.00th=[ 1167], | 30.00th=[ 1167], 40.00th=[ 1250], 50.00th=[ 1250], 60.00th=[ 1250], | 70.00th=[ 1267], 80.00th=[ 1267], 90.00th=[ 1267], 95.00th=[ 1267], | 99.00th=[ 1267], 99.50th=[ 1267], 99.90th=[ 1267], 99.95th=[ 1267], | 99.99th=[ 1267] bw ( KiB/s): min= 8062, max= 8192, per=100.00%, avg=8127.00, stdev=91.92, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 2000=100.00% cpu : usr=0.00%, sys=10.14%, ctx=253, 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=179547: Sat Sep 5 10:51:26 2026 read: IOPS=0, BW=914KiB/s (936kB/s)(4096KiB/4482msec) clat (nsec): min=1176.6M, max=1176.6M, avg=1176569272.00, stdev= 0.00 lat (nsec): min=1176.6M, max=1176.6M, avg=1176571574.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1183], 5.00th=[ 1183], 10.00th=[ 1183], 20.00th=[ 1183], | 30.00th=[ 1183], 40.00th=[ 1183], 50.00th=[ 1183], 60.00th=[ 1183], | 70.00th=[ 1183], 80.00th=[ 1183], 90.00th=[ 1183], 95.00th=[ 1183], | 99.00th=[ 1183], 99.50th=[ 1183], 99.90th=[ 1183], 99.95th=[ 1183], | 99.99th=[ 1183] bw ( KiB/s): min= 8192, max= 8192, per=100.00%, avg=8192.00, stdev= 0.00, samples=1 iops : min= 2, max= 2, avg= 2.00, stdev= 0.00, samples=1 write: IOPS=0, BW=1828KiB/s (1872kB/s)(8192KiB/4482msec); 0 zone resets clat (msec): min=1060, max=2099, avg=1580.00, stdev=734.67 lat (msec): min=1060, max=2099, avg=1580.25, stdev=734.73 clat percentiles (msec): | 1.00th=[ 1062], 5.00th=[ 1062], 10.00th=[ 1062], 20.00th=[ 1062], | 30.00th=[ 1062], 40.00th=[ 1062], 50.00th=[ 1062], 60.00th=[ 2106], | 70.00th=[ 2106], 80.00th=[ 2106], 90.00th=[ 2106], 95.00th=[ 2106], | 99.00th=[ 2106], 99.50th=[ 2106], 99.90th=[ 2106], 99.95th=[ 2106], | 99.99th=[ 2106] bw ( KiB/s): min= 7922, max= 7922, per=100.00%, avg=7922.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 2000=66.67%, >=2000=33.33% cpu : usr=0.09%, sys=2.54%, ctx=95, 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=179548: Sat Sep 5 10:51:26 2026 write: IOPS=0, BW=3750KiB/s (3840kB/s)(12.0MiB/3277msec); 0 zone resets clat (msec): min=729, max=1740, avg=1079.39, stdev=572.46 lat (msec): min=730, max=1740, avg=1079.75, stdev=572.55 clat percentiles (msec): | 1.00th=[ 735], 5.00th=[ 735], 10.00th=[ 735], 20.00th=[ 735], | 30.00th=[ 735], 40.00th=[ 768], 50.00th=[ 768], 60.00th=[ 768], | 70.00th=[ 1737], 80.00th=[ 1737], 90.00th=[ 1737], 95.00th=[ 1737], | 99.00th=[ 1737], 99.50th=[ 1737], 99.90th=[ 1737], 99.95th=[ 1737], | 99.99th=[ 1737] bw ( KiB/s): min= 8000, max= 8192, per=100.00%, avg=8096.00, stdev=135.76, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 750=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=2.26%, ctx=53, 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=179549: Sat Sep 5 10:51:26 2026 write: IOPS=0, BW=3550KiB/s (3636kB/s)(12.0MiB/3461msec); 0 zone resets clat (msec): min=624, max=1803, avg=1117.71, stdev=612.51 lat (msec): min=625, max=1808, avg=1119.88, stdev=614.80 clat percentiles (msec): | 1.00th=[ 625], 5.00th=[ 625], 10.00th=[ 625], 20.00th=[ 625], | 30.00th=[ 625], 40.00th=[ 927], 50.00th=[ 927], 60.00th=[ 927], | 70.00th=[ 1804], 80.00th=[ 1804], 90.00th=[ 1804], 95.00th=[ 1804], | 99.00th=[ 1804], 99.50th=[ 1804], 99.90th=[ 1804], 99.95th=[ 1804], | 99.99th=[ 1804] bw ( KiB/s): min= 7907, max= 8000, per=100.00%, avg=7953.50, stdev=65.76, 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=3.58%, ctx=73, 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=3656KiB/s (3743kB/s), 914KiB/s-3171KiB/s (936kB/s-3247kB/s), io=16.0MiB (16.8MB), run=3875-4482msec WRITE: bw=7311KiB/s (7486kB/s), 1828KiB/s-3750KiB/s (1872kB/s-3840kB/s), io=32.0MiB (33.6MB), run=3277-4482msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179551: Sat Sep 5 10:51:27 2026 read: IOPS=0, BW=2921KiB/s (2991kB/s)(12.0MiB/4207msec) clat (msec): min=290, max=1869, avg=1314.22, stdev=887.87 lat (msec): min=290, max=1869, avg=1314.22, stdev=887.87 clat percentiles (msec): | 1.00th=[ 292], 5.00th=[ 292], 10.00th=[ 292], 20.00th=[ 292], | 30.00th=[ 292], 40.00th=[ 1787], 50.00th=[ 1787], 60.00th=[ 1787], | 70.00th=[ 1871], 80.00th=[ 1871], 90.00th=[ 1871], 95.00th=[ 1871], | 99.00th=[ 1871], 99.50th=[ 1871], 99.90th=[ 1871], 99.95th=[ 1871], | 99.99th=[ 1871] bw ( KiB/s): min= 8000, max= 8000, per=100.00%, avg=8000.00, 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=2.50%, ctx=56, 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=179552: Sat Sep 5 10:51:27 2026 read: IOPS=0, BW=852KiB/s (873kB/s)(4096KiB/4807msec) clat (nsec): min=2168.3M, max=2168.3M, avg=2168274819.00, stdev= 0.00 lat (nsec): min=2168.3M, max=2168.3M, avg=2168277489.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 2165], 5.00th=[ 2165], 10.00th=[ 2165], 20.00th=[ 2165], | 30.00th=[ 2165], 40.00th=[ 2165], 50.00th=[ 2165], 60.00th=[ 2165], | 70.00th=[ 2165], 80.00th=[ 2165], 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= 7571, max= 7571, per=100.00%, avg=7571.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=1704KiB/s (1745kB/s)(8192KiB/4807msec); 0 zone resets clat (msec): min=1032, max=1347, avg=1190.08, stdev=222.88 lat (msec): min=1032, max=1348, avg=1190.33, stdev=222.98 clat percentiles (msec): | 1.00th=[ 1036], 5.00th=[ 1036], 10.00th=[ 1036], 20.00th=[ 1036], | 30.00th=[ 1036], 40.00th=[ 1036], 50.00th=[ 1036], 60.00th=[ 1351], | 70.00th=[ 1351], 80.00th=[ 1351], 90.00th=[ 1351], 95.00th=[ 1351], | 99.00th=[ 1351], 99.50th=[ 1351], 99.90th=[ 1351], 99.95th=[ 1351], | 99.99th=[ 1351] 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 lat (msec) : 2000=66.67%, >=2000=33.33% cpu : usr=0.15%, sys=2.91%, ctx=89, 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=179553: Sat Sep 5 10:51:27 2026 write: IOPS=0, BW=2591KiB/s (2654kB/s)(12.0MiB/4742msec); 0 zone resets clat (msec): min=242, max=2572, avg=1559.44, stdev=1194.06 lat (msec): min=243, max=2572, avg=1559.83, stdev=1194.06 clat percentiles (msec): | 1.00th=[ 243], 5.00th=[ 243], 10.00th=[ 243], 20.00th=[ 243], | 30.00th=[ 243], 40.00th=[ 1871], 50.00th=[ 1871], 60.00th=[ 1871], | 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= 7571, max= 7571, per=100.00%, avg=7571.00, 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=2.26%, ctx=57, 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=179554: Sat Sep 5 10:51:27 2026 write: IOPS=0, BW=3336KiB/s (3416kB/s)(12.0MiB/3683msec); 0 zone resets clat (msec): min=775, max=1474, avg=1172.71, stdev=359.32 lat (msec): min=777, max=1478, avg=1176.45, stdev=360.68 clat percentiles (msec): | 1.00th=[ 776], 5.00th=[ 776], 10.00th=[ 776], 20.00th=[ 776], | 30.00th=[ 776], 40.00th=[ 1267], 50.00th=[ 1267], 60.00th=[ 1267], | 70.00th=[ 1469], 80.00th=[ 1469], 90.00th=[ 1469], 95.00th=[ 1469], | 99.00th=[ 1469], 99.50th=[ 1469], 99.90th=[ 1469], 99.95th=[ 1469], | 99.99th=[ 1469] bw ( KiB/s): min= 7340, max= 8159, per=100.00%, avg=7749.50, stdev=579.12, 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=2.58%, ctx=55, 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 Run status group 0 (all jobs): READ: bw=3408KiB/s (3490kB/s), 852KiB/s-2921KiB/s (873kB/s-2991kB/s), io=16.0MiB (16.8MB), run=4207-4807msec WRITE: bw=6817KiB/s (6980kB/s), 1704KiB/s-3336KiB/s (1745kB/s-3416kB/s), io=32.0MiB (33.6MB), run=3683-4807msec