== sanity test 398b: DIO and buffer IO race ============== 18:07:52 (1787609272) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 5.3639 s, 9.4 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=175095: Mon Aug 24 18:10:23 2026 read: IOPS=11, BW=44.4KiB/s (45.4kB/s)(5992KiB/135014msec) clat (usec): min=36, max=454233, avg=43248.39, stdev=35194.80 lat (usec): min=36, max=454234, avg=43260.38, stdev=35198.69 clat percentiles (usec): | 1.00th=[ 53], 5.00th=[ 70], 10.00th=[ 95], 20.00th=[ 18220], | 30.00th=[ 24773], 40.00th=[ 30802], 50.00th=[ 36963], 60.00th=[ 44303], | 70.00th=[ 53216], 80.00th=[ 65274], 90.00th=[ 84411], 95.00th=[105382], | 99.00th=[156238], 99.50th=[196084], 99.90th=[316670], 99.95th=[455082], | 99.99th=[455082] bw ( KiB/s): min= 7, max= 103, per=25.01%, avg=44.26, stdev=19.94, samples=262 iops : min= 1, max= 25, avg=10.39, stdev= 5.03, samples=262 write: IOPS=11, BW=46.6KiB/s (47.8kB/s)(6296KiB/135014msec); 0 zone resets clat (usec): min=1020, max=463428, avg=44434.02, stdev=47418.71 lat (usec): min=1021, max=463429, avg=44441.18, stdev=47419.20 clat percentiles (usec): | 1.00th=[ 1205], 5.00th=[ 1467], 10.00th=[ 2376], 20.00th=[ 5014], | 30.00th=[ 8717], 40.00th=[ 19006], 50.00th=[ 31589], 60.00th=[ 44827], | 70.00th=[ 57934], 80.00th=[ 76022], 90.00th=[104334], 95.00th=[131597], | 99.00th=[208667], 99.50th=[258999], 99.90th=[325059], 99.95th=[463471], | 99.99th=[463471] bw ( KiB/s): min= 7, max= 143, per=24.65%, avg=45.85, stdev=20.68, samples=266 iops : min= 1, max= 35, avg=10.79, stdev= 5.22, samples=266 lat (usec) : 50=0.33%, 100=4.79%, 250=0.75%, 500=0.13% lat (msec) : 2=4.79%, 4=3.97%, 10=8.04%, 20=9.15%, 50=33.33% lat (msec) : 100=26.50%, 250=7.88%, 500=0.36% cpu : usr=0.09%, sys=5.21%, ctx=6674, majf=0, minf=18 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=175096: Mon Aug 24 18:10:23 2026 read: IOPS=11, BW=44.8KiB/s (45.8kB/s)(5940KiB/132694msec) clat (usec): min=34, max=501983, avg=43845.59, stdev=35455.33 lat (usec): min=35, max=501984, avg=43855.04, stdev=35452.69 clat percentiles (usec): | 1.00th=[ 55], 5.00th=[ 74], 10.00th=[ 208], 20.00th=[ 19006], | 30.00th=[ 25297], 40.00th=[ 30278], 50.00th=[ 36963], 60.00th=[ 43779], | 70.00th=[ 53216], 80.00th=[ 65799], 90.00th=[ 84411], 95.00th=[108528], | 99.00th=[158335], 99.50th=[191890], 99.90th=[270533], 99.95th=[501220], | 99.99th=[501220] bw ( KiB/s): min= 5, max= 95, per=25.06%, avg=44.36, stdev=18.31, samples=261 iops : min= 1, max= 23, avg=10.41, stdev= 4.60, samples=261 write: IOPS=11, BW=47.8KiB/s (48.0kB/s)(6348KiB/132694msec); 0 zone resets clat (usec): min=976, max=420794, avg=42422.32, stdev=44564.08 lat (usec): min=977, max=420796, avg=42427.62, stdev=44565.11 clat percentiles (usec): | 1.00th=[ 1188], 5.00th=[ 1450], 10.00th=[ 2278], 20.00th=[ 5080], | 30.00th=[ 9634], 40.00th=[ 20055], 50.00th=[ 31065], 60.00th=[ 42206], | 70.00th=[ 54789], 80.00th=[ 71828], 90.00th=[ 96994], 95.00th=[125305], | 99.00th=[202376], 99.50th=[238027], 99.90th=[350225], 99.95th=[421528], | 99.99th=[421528] bw ( KiB/s): min= 5, max= 126, per=25.54%, avg=47.50, stdev=22.26, samples=261 iops : min= 1, max= 31, avg=11.20, stdev= 5.62, samples=261 lat (usec) : 50=0.29%, 100=3.55%, 250=1.11%, 500=0.16%, 750=0.07% lat (usec) : 1000=0.10% lat (msec) : 2=4.43%, 4=4.00%, 10=7.71%, 20=9.70%, 50=35.61% lat (msec) : 100=25.46%, 250=7.52%, 500=0.26%, 750=0.03% cpu : usr=0.09%, sys=5.37%, ctx=6783, majf=0, minf=18 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1485,1587,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=175097: Mon Aug 24 18:10:23 2026 read: IOPS=11, BW=44.0KiB/s (46.0kB/s)(6028KiB/134070msec) clat (usec): min=36, max=310534, avg=42316.86, stdev=32470.75 lat (usec): min=37, max=310535, avg=42318.72, stdev=32470.85 clat percentiles (usec): | 1.00th=[ 57], 5.00th=[ 70], 10.00th=[ 147], 20.00th=[ 19792], | 30.00th=[ 24773], 40.00th=[ 30016], 50.00th=[ 36439], 60.00th=[ 43254], | 70.00th=[ 52691], 80.00th=[ 63177], 90.00th=[ 79168], 95.00th=[ 99091], | 99.00th=[160433], 99.50th=[189793], 99.90th=[258999], 99.95th=[312476], | 99.99th=[312476] bw ( KiB/s): min= 7, max= 111, per=25.27%, avg=44.73, stdev=19.41, samples=262 iops : min= 1, max= 27, avg=10.50, stdev= 4.88, samples=262 write: IOPS=11, BW=46.7KiB/s (47.8kB/s)(6260KiB/134070msec); 0 zone resets clat (usec): min=1063, max=633969, avg=44794.97, stdev=50724.67 lat (usec): min=1065, max=633992, avg=44797.75, stdev=50724.22 clat percentiles (usec): | 1.00th=[ 1172], 5.00th=[ 1401], 10.00th=[ 1942], 20.00th=[ 4359], | 30.00th=[ 8455], 40.00th=[ 20579], 50.00th=[ 32900], 60.00th=[ 43779], | 70.00th=[ 56886], 80.00th=[ 73925], 90.00th=[105382], 95.00th=[137364], | 99.00th=[217056], 99.50th=[252707], 99.90th=[455082], 99.95th=[633340], | 99.99th=[633340] bw ( KiB/s): min= 5, max= 120, per=24.90%, avg=46.31, stdev=20.80, samples=262 iops : min= 1, max= 30, avg=10.90, stdev= 5.24, samples=262 lat (usec) : 50=0.26%, 100=4.17%, 250=0.65%, 500=0.07%, 750=0.03% lat (usec) : 1000=0.03% lat (msec) : 2=5.34%, 4=4.56%, 10=7.10%, 20=7.81%, 50=36.52% lat (msec) : 100=25.39%, 250=7.75%, 500=0.29%, 750=0.03% cpu : usr=0.09%, sys=5.34%, ctx=6749, 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=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=175098: Mon Aug 24 18:10:23 2026 read: IOPS=11, BW=44.0KiB/s (46.1kB/s)(6052KiB/134528msec) clat (usec): min=37, max=350561, avg=43369.74, stdev=35960.65 lat (usec): min=37, max=350562, avg=43374.91, stdev=35960.48 clat percentiles (usec): | 1.00th=[ 54], 5.00th=[ 71], 10.00th=[ 119], 20.00th=[ 19006], | 30.00th=[ 24773], 40.00th=[ 30540], 50.00th=[ 35914], 60.00th=[ 43254], | 70.00th=[ 52167], 80.00th=[ 64226], 90.00th=[ 84411], 95.00th=[101188], | 99.00th=[187696], 99.50th=[235930], 99.90th=[291505], 99.95th=[350225], | 99.99th=[350225] bw ( KiB/s): min= 7, max= 127, per=25.36%, avg=44.89, stdev=20.55, samples=262 iops : min= 1, max= 31, avg=10.54, stdev= 5.19, samples=262 write: IOPS=11, BW=46.4KiB/s (47.5kB/s)(6236KiB/134528msec); 0 zone resets clat (usec): min=1078, max=702511, avg=44045.83, stdev=47734.32 lat (usec): min=1079, max=702514, avg=44052.82, stdev=47734.76 clat percentiles (usec): | 1.00th=[ 1254], 5.00th=[ 1483], 10.00th=[ 2442], 20.00th=[ 5145], | 30.00th=[ 10028], 40.00th=[ 20317], 50.00th=[ 32900], 60.00th=[ 44303], | 70.00th=[ 56886], 80.00th=[ 73925], 90.00th=[103285], 95.00th=[129500], | 99.00th=[191890], 99.50th=[233833], 99.90th=[463471], 99.95th=[700449], | 99.99th=[700449] bw ( KiB/s): min= 7, max= 117, per=24.65%, avg=45.85, stdev=20.67, samples=264 iops : min= 1, max= 29, avg=10.78, stdev= 5.22, samples=264 lat (usec) : 50=0.33%, 100=4.10%, 250=0.98%, 500=0.16%, 750=0.07% lat (usec) : 1000=0.13% lat (msec) : 2=4.07%, 4=4.13%, 10=7.52%, 20=9.24%, 50=35.38% lat (msec) : 100=25.81%, 250=7.75%, 500=0.29%, 750=0.03% cpu : usr=0.09%, sys=5.20%, ctx=6821, majf=0, minf=18 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1513,1559,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=178KiB/s (182kB/s), 44.4KiB/s-44.0KiB/s (45.4kB/s-46.1kB/s), io=23.4MiB (24.6MB), run=132694-135014msec WRITE: bw=186KiB/s (191kB/s), 46.4KiB/s-47.8KiB/s (47.5kB/s-48.0kB/s), io=24.6MiB (25.7MB), run=132694-135014msec fio: pid=175090, 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=175090: Mon Aug 24 18:12:41 2026 read: IOPS=4, BW=17.6KiB/s (17.0kB/s)(3212KiB/182821msec) clat (msec): min=7, max=1056, avg=53.87, stdev=60.21 lat (msec): min=7, max=1056, avg=53.88, stdev=60.21 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 13], 10.00th=[ 16], 20.00th=[ 21], | 30.00th=[ 27], 40.00th=[ 32], 50.00th=[ 39], 60.00th=[ 48], | 70.00th=[ 59], 80.00th=[ 78], 90.00th=[ 103], 95.00th=[ 130], | 99.00th=[ 243], 99.50th=[ 342], 99.90th=[ 1062], 99.95th=[ 1062], | 99.99th=[ 1062] bw ( KiB/s): min= 7, max= 87, per=25.87%, avg=19.92, stdev=13.27, samples=307 iops : min= 1, max= 21, avg= 4.28, stdev= 3.31, samples=307 write: IOPS=4, BW=18.6KiB/s (18.0kB/s)(3392KiB/182821msec); 0 zone resets clat (msec): min=35, max=542, avg=164.03, stdev=67.23 lat (msec): min=35, max=542, avg=164.03, stdev=67.23 clat percentiles (msec): | 1.00th=[ 62], 5.00th=[ 78], 10.00th=[ 89], 20.00th=[ 108], | 30.00th=[ 124], 40.00th=[ 138], 50.00th=[ 155], 60.00th=[ 169], | 70.00th=[ 190], 80.00th=[ 213], 90.00th=[ 251], 95.00th=[ 284], | 99.00th=[ 384], 99.50th=[ 418], 99.90th=[ 542], 99.95th=[ 542], | 99.99th=[ 542] bw ( KiB/s): min= 7, max= 47, per=22.67%, avg=18.36, stdev= 8.20, samples=351 iops : min= 1, max= 11, avg= 3.89, stdev= 2.08, samples=351 lat (msec) : 10=1.15%, 20=7.69%, 50=21.67%, 100=20.88%, 250=42.80% lat (msec) : 500=5.63%, 750=0.06%, 2000=0.06% cpu : usr=0.04%, sys=1.03%, ctx=2501, 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=804,848,0,0 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=175091: Mon Aug 24 18:12:41 2026 read: IOPS=5, BW=21.7KiB/s (22.2kB/s)(5940KiB/273583msec) clat (msec): min=6, max=1095, avg=40.19, stdev=47.58 lat (msec): min=6, max=1095, avg=40.20, stdev=47.58 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=[ 34], | 70.00th=[ 42], 80.00th=[ 53], 90.00th=[ 79], 95.00th=[ 107], | 99.00th=[ 194], 99.50th=[ 247], 99.90th=[ 514], 99.95th=[ 1099], | 99.99th=[ 1099] bw ( KiB/s): min= 7, max= 87, per=31.72%, avg=24.42, stdev=15.79, samples=468 iops : min= 1, max= 21, avg= 5.43, stdev= 3.96, samples=468 write: IOPS=5, BW=23.2KiB/s (23.8kB/s)(6348KiB/273583msec); 0 zone resets clat (msec): min=36, max=683, avg=134.47, stdev=67.17 lat (msec): min=36, max=683, avg=134.48, stdev=67.17 clat percentiles (msec): | 1.00th=[ 50], 5.00th=[ 62], 10.00th=[ 68], 20.00th=[ 82], | 30.00th=[ 92], 40.00th=[ 103], 50.00th=[ 117], 60.00th=[ 136], | 70.00th=[ 155], 80.00th=[ 178], 90.00th=[ 222], 95.00th=[ 266], | 99.00th=[ 355], 99.50th=[ 393], 99.90th=[ 502], 99.95th=[ 684], | 99.99th=[ 684] bw ( KiB/s): min= 7, max= 48, per=28.66%, avg=23.22, stdev=10.37, samples=525 iops : min= 1, max= 12, avg= 5.13, stdev= 2.63, samples=525 lat (msec) : 10=2.25%, 20=12.76%, 50=23.24%, 100=26.46%, 250=31.80% lat (msec) : 500=3.35%, 750=0.10%, 2000=0.03% cpu : usr=0.05%, sys=1.30%, ctx=5702, 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=175092: Mon Aug 24 18:12:41 2026 read: IOPS=5, BW=22.0KiB/s (22.5kB/s)(6028KiB/273880msec) clat (msec): min=5, max=543, avg=40.78, stdev=41.02 lat (msec): min=5, max=543, avg=40.79, stdev=41.02 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=[ 56], 90.00th=[ 85], 95.00th=[ 109], | 99.00th=[ 203], 99.50th=[ 247], 99.90th=[ 498], 99.95th=[ 542], | 99.99th=[ 542] bw ( KiB/s): min= 7, max= 111, per=31.48%, avg=24.24, stdev=16.23, samples=479 iops : min= 1, max= 27, avg= 5.39, stdev= 4.08, samples=479 write: IOPS=5, BW=22.9KiB/s (23.4kB/s)(6260KiB/273880msec); 0 zone resets clat (msec): min=38, max=1229, avg=135.46, stdev=73.08 lat (msec): min=38, max=1229, avg=135.47, stdev=73.08 clat percentiles (msec): | 1.00th=[ 50], 5.00th=[ 62], 10.00th=[ 70], 20.00th=[ 82], | 30.00th=[ 94], 40.00th=[ 105], 50.00th=[ 120], 60.00th=[ 133], | 70.00th=[ 155], 80.00th=[ 180], 90.00th=[ 222], 95.00th=[ 262], | 99.00th=[ 384], 99.50th=[ 460], 99.90th=[ 676], 99.95th=[ 1234], | 99.99th=[ 1234] bw ( KiB/s): min= 7, max= 56, per=28.34%, avg=22.96, stdev=10.65, samples=524 iops : min= 1, max= 14, avg= 5.06, stdev= 2.71, samples=524 lat (msec) : 10=2.15%, 20=13.15%, 50=23.01%, 100=26.07%, 250=32.13% lat (msec) : 500=3.35%, 750=0.10%, 2000=0.03% cpu : usr=0.05%, sys=1.30%, ctx=5637, 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=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=175093: Mon Aug 24 18:12:41 2026 read: IOPS=5, BW=22.5KiB/s (22.0kB/s)(6052KiB/269556msec) clat (msec): min=6, max=545, avg=39.03, stdev=39.80 lat (msec): min=6, max=545, avg=39.04, stdev=39.80 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 16], | 30.00th=[ 20], 40.00th=[ 23], 50.00th=[ 28], 60.00th=[ 34], | 70.00th=[ 41], 80.00th=[ 54], 90.00th=[ 80], 95.00th=[ 102], | 99.00th=[ 180], 99.50th=[ 234], 99.90th=[ 531], 99.95th=[ 550], | 99.99th=[ 550] bw ( KiB/s): min= 7, max= 120, per=32.38%, avg=24.93, stdev=16.46, samples=468 iops : min= 1, max= 30, avg= 5.56, stdev= 4.16, samples=468 write: IOPS=5, BW=23.1KiB/s (23.7kB/s)(6236KiB/269556msec); 0 zone resets clat (msec): min=37, max=1316, avg=134.75, stdev=71.52 lat (msec): min=37, max=1316, avg=134.75, stdev=71.52 clat percentiles (msec): | 1.00th=[ 49], 5.00th=[ 62], 10.00th=[ 71], 20.00th=[ 83], | 30.00th=[ 94], 40.00th=[ 105], 50.00th=[ 117], 60.00th=[ 134], | 70.00th=[ 155], 80.00th=[ 178], 90.00th=[ 220], 95.00th=[ 255], | 99.00th=[ 384], 99.50th=[ 414], 99.90th=[ 510], 99.95th=[ 1318], | 99.99th=[ 1318] bw ( KiB/s): min= 7, max= 63, per=28.27%, avg=22.89, stdev=10.60, samples=523 iops : min= 1, max= 15, avg= 5.05, stdev= 2.68, samples=523 lat (msec) : 10=2.44%, 20=13.35%, 50=23.18%, 100=25.65%, 250=32.49% lat (msec) : 500=2.73%, 750=0.13%, 2000=0.03% cpu : usr=0.05%, sys=1.29%, ctx=5589, 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=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=77.5KiB/s (79.4kB/s), 17.6KiB/s-22.5KiB/s (17.0kB/s-22.0kB/s), io=20.7MiB (21.7MB), run=182821-273880msec WRITE: bw=81.2KiB/s (83.1kB/s), 18.6KiB/s-23.2KiB/s (18.0kB/s-23.8kB/s), io=21.7MiB (22.8MB), run=182821-273880msec 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=175153: Mon Aug 24 18:13:30 2026 read: IOPS=10, BW=166KiB/s (170kB/s)(5920KiB/35747msec) clat (usec): min=37, max=281539, avg=50348.97, stdev=40091.44 lat (usec): min=37, max=281540, avg=50365.10, stdev=40094.57 clat percentiles (usec): | 1.00th=[ 42], 5.00th=[ 62], 10.00th=[ 73], 20.00th=[ 180], | 30.00th=[ 32113], 40.00th=[ 41157], 50.00th=[ 45876], 60.00th=[ 54264], | 70.00th=[ 63701], 80.00th=[ 80217], 90.00th=[ 98042], 95.00th=[123208], | 99.00th=[179307], 99.50th=[200279], 99.90th=[283116], 99.95th=[283116], | 99.99th=[283116] bw ( KiB/s): min= 31, max= 319, per=25.84%, avg=165.64, stdev=64.10, samples=70 iops : min= 1, max= 19, avg= 9.56, stdev= 4.04, samples=70 write: IOPS=11, BW=178KiB/s (182kB/s)(6368KiB/35747msec); 0 zone resets clat (usec): min=1585, max=379180, avg=42653.24, stdev=46309.90 lat (usec): min=1587, max=379184, avg=42661.06, stdev=46308.11 clat percentiles (usec): | 1.00th=[ 1680], 5.00th=[ 2114], 10.00th=[ 4015], 20.00th=[ 7308], | 30.00th=[ 10421], 40.00th=[ 17957], 50.00th=[ 27395], 60.00th=[ 41157], | 70.00th=[ 52691], 80.00th=[ 71828], 90.00th=[ 95945], 95.00th=[128451], | 99.00th=[206570], 99.50th=[320865], 99.90th=[379585], 99.95th=[379585], | 99.99th=[379585] bw ( KiB/s): min= 31, max= 367, per=26.75%, avg=180.28, stdev=74.27, samples=69 iops : min= 1, max= 22, avg=10.48, stdev= 4.71, samples=69 lat (usec) : 50=0.78%, 100=7.94%, 250=1.04%, 500=0.26% lat (msec) : 2=2.08%, 4=3.26%, 10=10.16%, 20=6.77%, 50=28.91% lat (msec) : 100=29.56%, 250=8.85%, 500=0.39% cpu : usr=0.09%, sys=5.20%, ctx=1539, 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=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=175154: Mon Aug 24 18:13:30 2026 read: IOPS=9, BW=154KiB/s (157kB/s)(5744KiB/37365msec) clat (usec): min=42, max=242704, avg=54413.92, stdev=38693.39 lat (usec): min=42, max=242706, avg=54421.48, stdev=38692.44 clat percentiles (usec): | 1.00th=[ 44], 5.00th=[ 69], 10.00th=[ 86], 20.00th=[ 22152], | 30.00th=[ 32900], 40.00th=[ 41157], 50.00th=[ 51119], 60.00th=[ 60031], | 70.00th=[ 70779], 80.00th=[ 87557], 90.00th=[105382], 95.00th=[115868], | 99.00th=[158335], 99.50th=[206570], 99.90th=[242222], 99.95th=[242222], | 99.99th=[242222] bw ( KiB/s): min= 31, max= 351, per=24.02%, avg=153.97, stdev=67.22, samples=73 iops : min= 1, max= 21, avg= 8.79, stdev= 4.22, samples=73 write: IOPS=10, BW=175KiB/s (179kB/s)(6544KiB/37365msec); 0 zone resets clat (usec): min=1467, max=297620, avg=42885.60, stdev=47132.16 lat (usec): min=1468, max=297623, avg=42896.33, stdev=47130.63 clat percentiles (usec): | 1.00th=[ 1647], 5.00th=[ 1991], 10.00th=[ 2999], 20.00th=[ 6259], | 30.00th=[ 9110], 40.00th=[ 15139], 50.00th=[ 26870], 60.00th=[ 41157], | 70.00th=[ 54264], 80.00th=[ 72877], 90.00th=[109577], 95.00th=[130548], | 99.00th=[206570], 99.50th=[246416], 99.90th=[295699], 99.95th=[295699], | 99.99th=[295699] bw ( KiB/s): min= 30, max= 479, per=25.92%, avg=174.71, stdev=86.77, samples=73 iops : min= 1, max= 29, avg=10.11, stdev= 5.44, samples=73 lat (usec) : 50=0.52%, 100=5.21%, 250=0.39%, 500=0.26%, 750=0.13% lat (usec) : 1000=0.13% lat (msec) : 2=2.99%, 4=4.17%, 10=10.42%, 20=8.07%, 50=26.95% lat (msec) : 100=27.86%, 250=12.63%, 500=0.26% cpu : usr=0.09%, sys=5.51%, ctx=1642, 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=175155: Mon Aug 24 18:13:30 2026 read: IOPS=10, BW=169KiB/s (173kB/s)(6256KiB/36969msec) clat (usec): min=40, max=286125, avg=49340.09, stdev=36725.46 lat (usec): min=40, max=286127, avg=49341.76, stdev=36725.49 clat percentiles (usec): | 1.00th=[ 45], 5.00th=[ 65], 10.00th=[ 86], 20.00th=[ 20055], | 30.00th=[ 32900], 40.00th=[ 39584], 50.00th=[ 47973], 60.00th=[ 54789], | 70.00th=[ 63701], 80.00th=[ 72877], 90.00th=[ 88605], 95.00th=[110625], | 99.00th=[162530], 99.50th=[246416], 99.90th=[287310], 99.95th=[287310], | 99.99th=[287310] bw ( KiB/s): min= 31, max= 383, per=26.55%, avg=170.21, stdev=84.77, samples=72 iops : min= 1, max= 23, avg= 9.83, stdev= 5.37, samples=72 write: IOPS=10, BW=163KiB/s (167kB/s)(6032KiB/36969msec); 0 zone resets clat (usec): min=1461, max=427803, avg=46056.19, stdev=53881.27 lat (usec): min=1463, max=427806, avg=46059.75, stdev=53880.90 clat percentiles (usec): | 1.00th=[ 1696], 5.00th=[ 2278], 10.00th=[ 3851], 20.00th=[ 7111], | 30.00th=[ 11338], 40.00th=[ 17433], 50.00th=[ 31327], 60.00th=[ 44303], | 70.00th=[ 56361], 80.00th=[ 73925], 90.00th=[105382], 95.00th=[135267], | 99.00th=[283116], 99.50th=[337642], 99.90th=[425722], 99.95th=[425722], | 99.99th=[425722] bw ( KiB/s): min= 31, max= 447, per=23.92%, avg=161.25, stdev=76.92, samples=72 iops : min= 1, max= 27, avg= 9.26, stdev= 4.83, samples=72 lat (usec) : 50=1.04%, 100=4.95%, 250=1.43%, 500=0.13%, 750=0.52% lat (usec) : 1000=0.13% lat (msec) : 2=2.08%, 4=3.39%, 10=8.07%, 20=9.24%, 50=27.34% lat (msec) : 100=32.68%, 250=8.07%, 500=0.91% cpu : usr=0.07%, sys=4.69%, ctx=1626, 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=175156: Mon Aug 24 18:13:30 2026 read: IOPS=10, BW=172KiB/s (176kB/s)(6032KiB/35169msec) clat (usec): min=38, max=228552, avg=52177.70, stdev=39209.99 lat (usec): min=39, max=228554, avg=52183.11, stdev=39205.47 clat percentiles (usec): | 1.00th=[ 46], 5.00th=[ 63], 10.00th=[ 78], 20.00th=[ 17433], | 30.00th=[ 31851], 40.00th=[ 40633], 50.00th=[ 49021], 60.00th=[ 60031], | 70.00th=[ 67634], 80.00th=[ 81265], 90.00th=[100140], 95.00th=[116917], | 99.00th=[198181], 99.50th=[227541], 99.90th=[227541], 99.95th=[227541], | 99.99th=[227541] bw ( KiB/s): min= 31, max= 367, per=26.98%, avg=172.97, stdev=71.97, samples=67 iops : min= 1, max= 22, avg=10.01, stdev= 4.56, samples=67 write: IOPS=11, BW=178KiB/s (182kB/s)(6256KiB/35169msec); 0 zone resets clat (usec): min=1683, max=261037, avg=38480.51, stdev=43541.84 lat (usec): min=1686, max=261039, avg=38484.29, stdev=43541.69 clat percentiles (usec): | 1.00th=[ 1745], 5.00th=[ 2073], 10.00th=[ 2769], 20.00th=[ 5211], | 30.00th=[ 8160], 40.00th=[ 11207], 50.00th=[ 18482], 60.00th=[ 33424], | 70.00th=[ 51119], 80.00th=[ 74974], 90.00th=[100140], 95.00th=[119014], | 99.00th=[198181], 99.50th=[254804], 99.90th=[261096], 99.95th=[261096], | 99.99th=[261096] bw ( KiB/s): min= 31, max= 415, per=26.15%, avg=176.25, stdev=89.43, samples=68 iops : min= 1, max= 25, avg=10.24, stdev= 5.72, samples=68 lat (usec) : 50=0.65%, 100=5.86%, 250=1.43%, 500=0.26%, 750=0.13% lat (msec) : 2=2.60%, 4=5.86%, 10=11.33%, 20=8.33%, 50=23.96% lat (msec) : 100=29.43%, 250=9.90%, 500=0.26% cpu : usr=0.10%, sys=4.95%, ctx=1488, 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=641KiB/s (656kB/s), 154KiB/s-172KiB/s (157kB/s-176kB/s), io=23.4MiB (24.5MB), run=35169-37365msec WRITE: bw=674KiB/s (691kB/s), 163KiB/s-178KiB/s (167kB/s-182kB/s), io=24.6MiB (25.8MB), run=35169-37365msec rand-rw: (groupid=0, jobs=1): err= 0: pid=175158: Mon Aug 24 18:14:09 2026 read: IOPS=5, BW=80.1KiB/s (82.0kB/s)(5920KiB/73907msec) clat (msec): min=8, max=304, avg=48.83, stdev=54.92 lat (msec): min=8, max=304, avg=48.84, stdev=54.92 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 12], 10.00th=[ 13], 20.00th=[ 18], | 30.00th=[ 21], 40.00th=[ 23], 50.00th=[ 28], 60.00th=[ 33], | 70.00th=[ 42], 80.00th=[ 67], 90.00th=[ 114], 95.00th=[ 182], | 99.00th=[ 271], 99.50th=[ 284], 99.90th=[ 305], 99.95th=[ 305], | 99.99th=[ 305] bw ( KiB/s): min= 30, max= 254, per=27.97%, avg=88.37, stdev=55.07, samples=131 iops : min= 1, max= 15, avg= 4.73, stdev= 3.51, samples=131 write: IOPS=5, BW=86.2KiB/s (88.2kB/s)(6368KiB/73907msec); 0 zone resets clat (msec): min=35, max=505, avg=140.09, stdev=71.10 lat (msec): min=35, max=505, avg=140.09, stdev=71.10 clat percentiles (msec): | 1.00th=[ 54], 5.00th=[ 68], 10.00th=[ 78], 20.00th=[ 87], | 30.00th=[ 97], 40.00th=[ 109], 50.00th=[ 124], 60.00th=[ 134], | 70.00th=[ 153], 80.00th=[ 180], 90.00th=[ 245], 95.00th=[ 288], | 99.00th=[ 384], 99.50th=[ 435], 99.90th=[ 506], 99.95th=[ 506], | 99.99th=[ 506] bw ( KiB/s): min= 21, max= 191, per=26.56%, avg=88.45, stdev=43.73, samples=141 iops : min= 1, max= 11, avg= 4.72, stdev= 2.78, samples=141 lat (msec) : 10=1.04%, 20=13.15%, 50=22.40%, 100=22.79%, 250=35.16% lat (msec) : 500=5.34%, 750=0.13% cpu : usr=0.05%, sys=1.32%, ctx=1298, 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=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=175159: Mon Aug 24 18:14:09 2026 read: IOPS=4, BW=76.0KiB/s (77.8kB/s)(5744KiB/75559msec) clat (msec): min=8, max=316, avg=44.21, stdev=47.79 lat (msec): min=8, max=316, avg=44.21, stdev=47.79 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 13], 10.00th=[ 14], 20.00th=[ 17], | 30.00th=[ 20], 40.00th=[ 23], 50.00th=[ 26], 60.00th=[ 31], | 70.00th=[ 40], 80.00th=[ 56], 90.00th=[ 106], 95.00th=[ 163], | 99.00th=[ 251], 99.50th=[ 300], 99.90th=[ 317], 99.95th=[ 317], | 99.99th=[ 317] bw ( KiB/s): min= 21, max= 285, per=29.98%, avg=94.75, stdev=57.04, samples=118 iops : min= 1, max= 17, avg= 5.13, stdev= 3.62, samples=118 write: IOPS=5, BW=86.6KiB/s (88.7kB/s)(6544KiB/75559msec); 0 zone resets clat (msec): min=49, max=423, avg=145.55, stdev=77.31 lat (msec): min=49, max=423, avg=145.56, stdev=77.31 clat percentiles (msec): | 1.00th=[ 55], 5.00th=[ 65], 10.00th=[ 78], 20.00th=[ 88], | 30.00th=[ 97], 40.00th=[ 107], 50.00th=[ 121], 60.00th=[ 136], | 70.00th=[ 157], 80.00th=[ 201], 90.00th=[ 259], 95.00th=[ 317], | 99.00th=[ 397], 99.50th=[ 409], 99.90th=[ 422], 99.95th=[ 422], | 99.99th=[ 422] bw ( KiB/s): min= 30, max= 220, per=26.70%, avg=88.91, stdev=41.12, samples=143 iops : min= 1, max= 13, avg= 4.76, stdev= 2.64, samples=143 lat (msec) : 10=0.78%, 20=14.32%, 50=20.44%, 100=23.83%, 250=34.11% lat (msec) : 500=6.51% cpu : usr=0.04%, sys=1.22%, ctx=1348, 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=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=175160: Mon Aug 24 18:14:09 2026 read: IOPS=5, BW=84.4KiB/s (86.4kB/s)(6256KiB/74140msec) clat (msec): min=6, max=451, avg=42.05, stdev=47.42 lat (msec): min=6, max=451, avg=42.06, stdev=47.43 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 15], 20.00th=[ 18], | 30.00th=[ 21], 40.00th=[ 24], 50.00th=[ 27], 60.00th=[ 33], | 70.00th=[ 39], 80.00th=[ 50], 90.00th=[ 86], 95.00th=[ 136], | 99.00th=[ 288], 99.50th=[ 296], 99.90th=[ 451], 99.95th=[ 451], | 99.99th=[ 451] bw ( KiB/s): min= 29, max= 318, per=30.25%, avg=95.60, stdev=70.72, samples=129 iops : min= 1, max= 19, avg= 5.16, stdev= 4.49, samples=129 write: IOPS=5, BW=81.4KiB/s (83.3kB/s)(6032KiB/74140msec); 0 zone resets clat (msec): min=50, max=591, avg=152.70, stdev=84.92 lat (msec): min=50, max=591, avg=152.70, stdev=84.92 clat percentiles (msec): | 1.00th=[ 59], 5.00th=[ 69], 10.00th=[ 75], 20.00th=[ 88], | 30.00th=[ 104], 40.00th=[ 114], 50.00th=[ 127], 60.00th=[ 142], | 70.00th=[ 163], 80.00th=[ 207], 90.00th=[ 275], 95.00th=[ 330], | 99.00th=[ 409], 99.50th=[ 542], 99.90th=[ 592], 99.95th=[ 592], | 99.99th=[ 592] bw ( KiB/s): min= 21, max= 160, per=24.86%, avg=82.80, stdev=41.63, samples=143 iops : min= 1, max= 10, avg= 4.36, stdev= 2.66, samples=143 lat (msec) : 10=1.17%, 20=14.19%, 50=25.65%, 100=19.92%, 250=32.29% lat (msec) : 500=6.51%, 750=0.26% cpu : usr=0.04%, sys=1.23%, ctx=1335, 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=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=175161: Mon Aug 24 18:14:09 2026 read: IOPS=5, BW=81.6KiB/s (83.5kB/s)(6032KiB/73943msec) clat (msec): min=7, max=442, avg=46.12, stdev=54.77 lat (msec): min=7, max=442, avg=46.12, stdev=54.77 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 16], | 30.00th=[ 21], 40.00th=[ 23], 50.00th=[ 27], 60.00th=[ 30], | 70.00th=[ 42], 80.00th=[ 59], 90.00th=[ 104], 95.00th=[ 150], | 99.00th=[ 284], 99.50th=[ 355], 99.90th=[ 443], 99.95th=[ 443], | 99.99th=[ 443] bw ( KiB/s): min= 29, max= 317, per=30.11%, avg=95.15, stdev=59.61, samples=123 iops : min= 1, max= 19, avg= 5.12, stdev= 3.79, samples=123 write: IOPS=5, BW=84.6KiB/s (86.6kB/s)(6256KiB/73943msec); 0 zone resets clat (msec): min=44, max=486, avg=144.29, stdev=73.82 lat (msec): min=44, max=486, avg=144.29, stdev=73.82 clat percentiles (msec): | 1.00th=[ 56], 5.00th=[ 68], 10.00th=[ 75], 20.00th=[ 87], | 30.00th=[ 97], 40.00th=[ 110], 50.00th=[ 124], 60.00th=[ 140], | 70.00th=[ 159], 80.00th=[ 201], 90.00th=[ 241], 95.00th=[ 296], | 99.00th=[ 426], 99.50th=[ 464], 99.90th=[ 489], 99.95th=[ 489], | 99.99th=[ 489] bw ( KiB/s): min= 30, max= 222, per=26.38%, avg=87.83, stdev=43.50, samples=139 iops : min= 1, max= 13, avg= 4.68, stdev= 2.78, samples=139 lat (msec) : 10=1.43%, 20=12.76%, 50=23.83%, 100=22.66%, 250=33.85% lat (msec) : 500=5.47% cpu : usr=0.03%, sys=1.23%, ctx=1301, 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=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=317KiB/s (325kB/s), 76.0KiB/s-84.4KiB/s (77.8kB/s-86.4kB/s), io=23.4MiB (24.5MB), run=73907-75559msec WRITE: bw=334KiB/s (342kB/s), 81.4KiB/s-86.6KiB/s (83.3kB/s-88.7kB/s), io=24.6MiB (25.8MB), run=73907-75559msec 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=175178: Mon Aug 24 18:14:28 2026 read: IOPS=1, BW=1591KiB/s (1629kB/s)(7168KiB/4506msec) clat (msec): min=3, max=363, avg=210.52, stdev=114.69 lat (msec): min=3, max=363, avg=210.53, stdev=114.69 clat percentiles (msec): | 1.00th=[ 4], 5.00th=[ 4], 10.00th=[ 4], 20.00th=[ 163], | 30.00th=[ 165], 40.00th=[ 165], 50.00th=[ 230], 60.00th=[ 268], | 70.00th=[ 268], 80.00th=[ 284], 90.00th=[ 363], 95.00th=[ 363], | 99.00th=[ 363], 99.50th=[ 363], 99.90th=[ 363], 99.95th=[ 363], | 99.99th=[ 363] bw ( KiB/s): min= 1875, max= 4096, per=88.02%, avg=3018.25, stdev=1231.73, samples=4 iops : min= 1, max= 4, avg= 2.25, stdev= 1.50, samples=4 write: IOPS=1, BW=1136KiB/s (1164kB/s)(5120KiB/4506msec); 0 zone resets clat (msec): min=226, max=901, avg=541.57, stdev=264.31 lat (msec): min=226, max=901, avg=541.77, stdev=264.32 clat percentiles (msec): | 1.00th=[ 226], 5.00th=[ 226], 10.00th=[ 226], 20.00th=[ 226], | 30.00th=[ 359], 40.00th=[ 359], 50.00th=[ 558], 60.00th=[ 558], | 70.00th=[ 667], 80.00th=[ 667], 90.00th=[ 902], 95.00th=[ 902], | 99.00th=[ 902], 99.50th=[ 902], 99.90th=[ 902], 99.95th=[ 902], | 99.99th=[ 902] bw ( KiB/s): min= 2000, max= 2039, per=42.14%, avg=2023.25, stdev=16.82, samples=4 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=4 lat (msec) : 4=8.33%, 250=33.33%, 500=33.33%, 750=16.67%, 1000=8.33% cpu : usr=0.00%, sys=13.94%, ctx=317, 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=175180: Mon Aug 24 18:14:28 2026 read: IOPS=0, BW=343KiB/s (351kB/s)(2048KiB/5972msec) clat (usec): min=1818, max=273920, avg=137869.49, stdev=192405.49 lat (usec): min=1819, max=273922, avg=137870.86, stdev=192405.46 clat percentiles (usec): | 1.00th=[ 1811], 5.00th=[ 1811], 10.00th=[ 1811], 20.00th=[ 1811], | 30.00th=[ 1811], 40.00th=[ 1811], 50.00th=[ 1811], 60.00th=[274727], | 70.00th=[274727], 80.00th=[274727], 90.00th=[274727], 95.00th=[274727], | 99.00th=[274727], 99.50th=[274727], 99.90th=[274727], 99.95th=[274727], | 99.99th=[274727] bw ( KiB/s): min= 1747, max= 1906, per=53.27%, avg=1826.50, stdev=112.43, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1715KiB/s (1756kB/s)(10.0MiB/5972msec); 0 zone resets clat (msec): min=106, max=1287, avg=539.14, stdev=411.66 lat (msec): min=106, max=1288, avg=539.63, stdev=411.46 clat percentiles (msec): | 1.00th=[ 107], 5.00th=[ 107], 10.00th=[ 107], 20.00th=[ 138], | 30.00th=[ 249], 40.00th=[ 355], 50.00th=[ 363], 60.00th=[ 401], | 70.00th=[ 477], 80.00th=[ 978], 90.00th=[ 1036], 95.00th=[ 1284], | 99.00th=[ 1284], 99.50th=[ 1284], 99.90th=[ 1284], 99.95th=[ 1284], | 99.99th=[ 1284] bw ( KiB/s): min= 1892, max= 4096, per=62.56%, avg=3003.33, stdev=1173.60, samples=6 iops : min= 1, max= 4, avg= 2.17, stdev= 1.33, samples=6 lat (msec) : 2=8.33%, 250=25.00%, 500=41.67%, 1000=8.33%, 2000=16.67% cpu : usr=0.00%, sys=11.02%, ctx=170, 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=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=175182: Mon Aug 24 18:14:28 2026 read: IOPS=1, BW=1220KiB/s (1249kB/s)(6144KiB/5037msec) clat (msec): min=73, max=448, avg=297.95, stdev=134.66 lat (msec): min=73, max=448, avg=297.95, stdev=134.66 clat percentiles (msec): | 1.00th=[ 73], 5.00th=[ 73], 10.00th=[ 73], 20.00th=[ 228], | 30.00th=[ 228], 40.00th=[ 288], 50.00th=[ 288], 60.00th=[ 363], | 70.00th=[ 388], 80.00th=[ 388], 90.00th=[ 447], 95.00th=[ 447], | 99.00th=[ 447], 99.50th=[ 447], 99.90th=[ 447], 99.95th=[ 447], | 99.99th=[ 447] bw ( KiB/s): min= 1892, max= 2048, per=58.38%, avg=2002.00, stdev=64.09, samples=5 iops : min= 1, max= 2, avg= 1.20, stdev= 0.45, samples=5 write: IOPS=1, BW=1220KiB/s (1249kB/s)(6144KiB/5037msec); 0 zone resets clat (msec): min=261, max=1293, avg=525.72, stdev=401.87 lat (msec): min=267, max=1294, avg=526.90, stdev=401.18 clat percentiles (msec): | 1.00th=[ 262], 5.00th=[ 262], 10.00th=[ 262], 20.00th=[ 268], | 30.00th=[ 268], 40.00th=[ 338], 50.00th=[ 338], 60.00th=[ 347], | 70.00th=[ 642], 80.00th=[ 642], 90.00th=[ 1301], 95.00th=[ 1301], | 99.00th=[ 1301], 99.50th=[ 1301], 99.90th=[ 1301], 99.95th=[ 1301], | 99.99th=[ 1301] bw ( KiB/s): min= 1600, max= 2048, per=39.86%, avg=1913.50, stdev=166.81, samples=6 iops : min= 1, max= 2, avg= 1.17, stdev= 0.41, samples=6 lat (msec) : 100=8.33%, 250=8.33%, 500=66.67%, 750=8.33%, 2000=8.33% cpu : usr=0.00%, sys=13.32%, ctx=376, 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=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=175184: Mon Aug 24 18:14:28 2026 read: IOPS=1, BW=1024KiB/s (1049kB/s)(5120KiB/4998msec) clat (msec): min=3, max=524, avg=312.10, stdev=203.76 lat (msec): min=3, max=524, avg=312.10, stdev=203.76 clat percentiles (msec): | 1.00th=[ 4], 5.00th=[ 4], 10.00th=[ 4], 20.00th=[ 4], | 30.00th=[ 222], 40.00th=[ 222], 50.00th=[ 405], 60.00th=[ 405], | 70.00th=[ 409], 80.00th=[ 409], 90.00th=[ 523], 95.00th=[ 523], | 99.00th=[ 523], 99.50th=[ 523], 99.90th=[ 523], 99.95th=[ 523], | 99.99th=[ 523] bw ( KiB/s): min= 2000, max= 4063, per=78.76%, avg=2700.67, stdev=1179.98, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 write: IOPS=1, BW=1434KiB/s (1469kB/s)(7168KiB/4998msec); 0 zone resets clat (msec): min=139, max=1016, avg=448.26, stdev=338.57 lat (msec): min=139, max=1018, avg=448.61, stdev=339.09 clat percentiles (msec): | 1.00th=[ 140], 5.00th=[ 140], 10.00th=[ 140], 20.00th=[ 194], | 30.00th=[ 243], 40.00th=[ 243], 50.00th=[ 300], 60.00th=[ 426], | 70.00th=[ 426], 80.00th=[ 818], 90.00th=[ 1020], 95.00th=[ 1020], | 99.00th=[ 1020], 99.50th=[ 1020], 99.90th=[ 1020], 99.95th=[ 1020], | 99.99th=[ 1020] bw ( KiB/s): min= 1729, max= 4096, per=57.01%, avg=2737.20, stdev=1227.38, samples=5 iops : min= 1, max= 4, avg= 2.00, stdev= 1.41, samples=5 lat (msec) : 4=8.33%, 250=33.33%, 500=33.33%, 750=8.33%, 1000=8.33% lat (msec) : 2000=8.33% cpu : usr=0.00%, sys=11.61%, ctx=251, 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=3429KiB/s (3512kB/s), 343KiB/s-1591KiB/s (351kB/s-1629kB/s), io=20.0MiB (20.0MB), run=4506-5972msec WRITE: bw=4801KiB/s (4916kB/s), 1136KiB/s-1715KiB/s (1164kB/s-1756kB/s), io=28.0MiB (29.4MB), run=4506-5972msec rand-rw: (groupid=0, jobs=1): err= 0: pid=175179: Mon Aug 24 18:14:28 2026 read: IOPS=1, BW=1896KiB/s (1942kB/s)(7168KiB/3780msec) clat (msec): min=90, max=254, avg=162.20, stdev=62.32 lat (msec): min=90, max=254, avg=162.20, stdev=62.32 clat percentiles (msec): | 1.00th=[ 91], 5.00th=[ 91], 10.00th=[ 91], 20.00th=[ 103], | 30.00th=[ 134], 40.00th=[ 134], 50.00th=[ 146], 60.00th=[ 176], | 70.00th=[ 176], 80.00th=[ 232], 90.00th=[ 255], 95.00th=[ 255], | 99.00th=[ 255], 99.50th=[ 255], 99.90th=[ 255], 99.95th=[ 255], | 99.99th=[ 255] bw ( KiB/s): min= 1835, max= 4087, per=96.72%, avg=3000.25, stdev=1252.07, samples=4 iops : min= 1, max= 3, avg= 2.00, stdev= 1.15, samples=4 write: IOPS=1, BW=1354KiB/s (1387kB/s)(5120KiB/3780msec); 0 zone resets clat (msec): min=235, max=869, avg=472.69, stdev=279.60 lat (msec): min=235, max=869, avg=472.90, stdev=279.50 clat percentiles (msec): | 1.00th=[ 236], 5.00th=[ 236], 10.00th=[ 236], 20.00th=[ 236], | 30.00th=[ 271], 40.00th=[ 271], 50.00th=[ 326], 60.00th=[ 326], | 70.00th=[ 667], 80.00th=[ 667], 90.00th=[ 869], 95.00th=[ 869], | 99.00th=[ 869], 99.50th=[ 869], 99.90th=[ 869], 99.95th=[ 869], | 99.99th=[ 869] bw ( KiB/s): min= 2043, max= 4000, per=75.43%, avg=3276.00, stdev=1073.21, samples=3 iops : min= 1, max= 3, avg= 2.33, stdev= 1.15, samples=3 lat (msec) : 100=8.33%, 250=50.00%, 500=25.00%, 750=8.33%, 1000=8.33% cpu : usr=0.05%, sys=4.47%, ctx=78, 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=175181: Mon Aug 24 18:14:28 2026 read: IOPS=0, BW=310KiB/s (318kB/s)(2048KiB/6601msec) clat (msec): min=103, max=773, avg=438.64, stdev=473.46 lat (msec): min=103, max=773, avg=438.64, stdev=473.47 clat percentiles (msec): | 1.00th=[ 105], 5.00th=[ 105], 10.00th=[ 105], 20.00th=[ 105], | 30.00th=[ 105], 40.00th=[ 105], 50.00th=[ 105], 60.00th=[ 776], | 70.00th=[ 776], 80.00th=[ 776], 90.00th=[ 776], 95.00th=[ 776], | 99.00th=[ 776], 99.50th=[ 776], 99.90th=[ 776], 99.95th=[ 776], | 99.99th=[ 776] bw ( KiB/s): min= 2031, max= 2039, per=65.60%, avg=2035.00, stdev= 5.66, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1551KiB/s (1589kB/s)(10.0MiB/6601msec); 0 zone resets clat (msec): min=181, max=1299, avg=559.32, stdev=416.38 lat (msec): min=182, max=1299, avg=559.47, stdev=416.33 clat percentiles (msec): | 1.00th=[ 182], 5.00th=[ 182], 10.00th=[ 182], 20.00th=[ 236], | 30.00th=[ 259], 40.00th=[ 275], 50.00th=[ 309], 60.00th=[ 334], | 70.00th=[ 609], 80.00th=[ 1011], 90.00th=[ 1083], 95.00th=[ 1301], | 99.00th=[ 1301], 99.50th=[ 1301], 99.90th=[ 1301], 99.95th=[ 1301], | 99.99th=[ 1301] bw ( KiB/s): min= 1851, max= 4031, per=60.82%, avg=2641.33, stdev=1067.13, samples=6 iops : min= 1, max= 3, avg= 1.67, stdev= 1.03, samples=6 lat (msec) : 250=25.00%, 500=33.33%, 750=8.33%, 1000=8.33%, 2000=25.00% cpu : usr=0.05%, sys=3.11%, ctx=84, 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=175183: Mon Aug 24 18:14:28 2026 read: IOPS=1, BW=1057KiB/s (1082kB/s)(6144KiB/5815msec) clat (msec): min=110, max=999, avg=398.47, stdev=360.21 lat (msec): min=110, max=999, avg=398.47, stdev=360.21 clat percentiles (msec): | 1.00th=[ 111], 5.00th=[ 111], 10.00th=[ 111], 20.00th=[ 136], | 30.00th=[ 136], 40.00th=[ 230], 50.00th=[ 230], 60.00th=[ 234], | 70.00th=[ 684], 80.00th=[ 684], 90.00th=[ 1003], 95.00th=[ 1003], | 99.00th=[ 1003], 99.50th=[ 1003], 99.90th=[ 1003], 99.95th=[ 1003], | 99.99th=[ 1003] bw ( KiB/s): min= 1851, max= 4079, per=80.63%, avg=2501.00, stdev=1055.66, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 write: IOPS=1, BW=1057KiB/s (1082kB/s)(6144KiB/5815msec); 0 zone resets clat (msec): min=204, max=1329, avg=553.77, stdev=476.10 lat (msec): min=204, max=1330, avg=554.12, stdev=476.52 clat percentiles (msec): | 1.00th=[ 205], 5.00th=[ 205], 10.00th=[ 205], 20.00th=[ 245], | 30.00th=[ 245], 40.00th=[ 271], 50.00th=[ 271], 60.00th=[ 309], | 70.00th=[ 969], 80.00th=[ 969], 90.00th=[ 1334], 95.00th=[ 1334], | 99.00th=[ 1334], 99.50th=[ 1334], 99.90th=[ 1334], 99.95th=[ 1334], | 99.99th=[ 1334] bw ( KiB/s): min= 1892, max= 2043, per=46.24%, avg=2008.00, stdev=59.09, samples=6 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=6 lat (msec) : 250=50.00%, 500=16.67%, 750=8.33%, 1000=16.67%, 2000=8.33% cpu : usr=0.05%, sys=4.08%, ctx=94, 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=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=175185: Mon Aug 24 18:14:28 2026 read: IOPS=0, BW=889KiB/s (911kB/s)(5120KiB/5758msec) clat (msec): min=177, max=592, avg=278.48, stdev=176.94 lat (msec): min=177, max=598, avg=279.73, stdev=179.70 clat percentiles (msec): | 1.00th=[ 178], 5.00th=[ 178], 10.00th=[ 178], 20.00th=[ 178], | 30.00th=[ 190], 40.00th=[ 190], 50.00th=[ 197], 60.00th=[ 197], | 70.00th=[ 236], 80.00th=[ 236], 90.00th=[ 592], 95.00th=[ 592], | 99.00th=[ 592], 99.50th=[ 592], 99.90th=[ 592], 99.95th=[ 592], | 99.99th=[ 592] bw ( KiB/s): min= 2000, max= 3703, per=83.15%, avg=2579.33, stdev=973.28, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 write: IOPS=1, BW=1245KiB/s (1275kB/s)(7168KiB/5758msec); 0 zone resets clat (msec): min=287, max=1166, avg=573.65, stdev=309.24 lat (msec): min=288, max=1171, avg=574.47, stdev=310.90 clat percentiles (msec): | 1.00th=[ 288], 5.00th=[ 288], 10.00th=[ 288], 20.00th=[ 342], | 30.00th=[ 393], 40.00th=[ 393], 50.00th=[ 439], 60.00th=[ 659], | 70.00th=[ 659], 80.00th=[ 735], 90.00th=[ 1167], 95.00th=[ 1167], | 99.00th=[ 1167], 99.50th=[ 1167], 99.90th=[ 1167], 99.95th=[ 1167], | 99.99th=[ 1167] bw ( KiB/s): min= 1892, max= 4063, per=54.03%, avg=2346.67, stdev=842.83, samples=6 iops : min= 1, max= 3, avg= 1.33, stdev= 0.82, samples=6 lat (msec) : 250=33.33%, 500=33.33%, 750=25.00%, 2000=8.33% cpu : usr=0.02%, sys=4.78%, ctx=119, 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=3103KiB/s (3177kB/s), 310KiB/s-1896KiB/s (318kB/s-1942kB/s), io=20.0MiB (20.0MB), run=3780-6601msec WRITE: bw=4344KiB/s (4448kB/s), 1057KiB/s-1551KiB/s (1082kB/s-1589kB/s), io=28.0MiB (29.4MB), run=3780-6601msec 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=175197: Mon Aug 24 18:14:45 2026 read: IOPS=1, BW=4558KiB/s (4667kB/s)(12.0MiB/2696msec) clat (msec): min=673, max=992, avg=849.31, stdev=162.36 lat (msec): min=673, max=992, avg=849.31, stdev=162.36 clat percentiles (msec): | 1.00th=[ 676], 5.00th=[ 676], 10.00th=[ 676], 20.00th=[ 676], | 30.00th=[ 676], 40.00th=[ 885], 50.00th=[ 885], 60.00th=[ 885], | 70.00th=[ 995], 80.00th=[ 995], 90.00th=[ 995], 95.00th=[ 995], | 99.00th=[ 995], 99.50th=[ 995], 99.90th=[ 995], 99.95th=[ 995], | 99.99th=[ 995] bw ( KiB/s): min= 8094, max= 8143, per=100.00%, avg=8118.50, stdev=34.65, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=33.33%, 1000=66.67% cpu : usr=0.00%, sys=12.47%, ctx=209, 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=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=175198: Mon Aug 24 18:14:45 2026 read: IOPS=0, BW=1069KiB/s (1095kB/s)(4096KiB/3831msec) clat (nsec): min=781425k, max=781425k, avg=781425018.00, stdev= 0.00 lat (nsec): min=781428k, max=781428k, avg=781427824.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 785], 5.00th=[ 785], 10.00th=[ 785], 20.00th=[ 785], | 30.00th=[ 785], 40.00th=[ 785], 50.00th=[ 785], 60.00th=[ 785], | 70.00th=[ 785], 80.00th=[ 785], 90.00th=[ 785], 95.00th=[ 785], | 99.00th=[ 785], 99.50th=[ 785], 99.90th=[ 785], 99.95th=[ 785], | 99.99th=[ 785] 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=2138KiB/s (2190kB/s)(8192KiB/3831msec); 0 zone resets clat (msec): min=1023, max=1960, avg=1492.33, stdev=662.49 lat (msec): min=1024, max=1967, avg=1495.89, stdev=666.86 clat percentiles (msec): | 1.00th=[ 1028], 5.00th=[ 1028], 10.00th=[ 1028], 20.00th=[ 1028], | 30.00th=[ 1028], 40.00th=[ 1028], 50.00th=[ 1028], 60.00th=[ 1955], | 70.00th=[ 1955], 80.00th=[ 1955], 90.00th=[ 1955], 95.00th=[ 1955], | 99.00th=[ 1955], 99.50th=[ 1955], 99.90th=[ 1955], 99.95th=[ 1955], | 99.99th=[ 1955] bw ( KiB/s): min= 8143, max= 8143, per=100.00%, avg=8143.00, 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=3.16%, ctx=70, 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=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=175199: Mon Aug 24 18:14:45 2026 write: IOPS=0, BW=3014KiB/s (3086kB/s)(12.0MiB/4077msec); 0 zone resets clat (msec): min=853, max=1881, avg=1315.49, stdev=521.67 lat (msec): min=854, max=1882, avg=1316.09, stdev=521.77 clat percentiles (msec): | 1.00th=[ 852], 5.00th=[ 852], 10.00th=[ 852], 20.00th=[ 852], | 30.00th=[ 852], 40.00th=[ 1217], 50.00th=[ 1217], 60.00th=[ 1217], | 70.00th=[ 1888], 80.00th=[ 1888], 90.00th=[ 1888], 95.00th=[ 1888], | 99.00th=[ 1888], 99.50th=[ 1888], 99.90th=[ 1888], 99.95th=[ 1888], | 99.99th=[ 1888] bw ( KiB/s): min= 7801, max= 8143, per=99.19%, avg=7972.00, stdev=241.83, 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=0.07%, sys=3.95%, ctx=50, 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 rand-rw: (groupid=0, jobs=1): err= 0: pid=175200: Mon Aug 24 18:14:45 2026 write: IOPS=1, BW=4224KiB/s (4326kB/s)(12.0MiB/2909msec); 0 zone resets clat (msec): min=363, max=1608, avg=957.98, stdev=624.38 lat (msec): min=364, max=1609, avg=959.03, stdev=624.31 clat percentiles (msec): | 1.00th=[ 363], 5.00th=[ 363], 10.00th=[ 363], 20.00th=[ 363], | 30.00th=[ 363], 40.00th=[ 902], 50.00th=[ 902], 60.00th=[ 902], | 70.00th=[ 1603], 80.00th=[ 1603], 90.00th=[ 1603], 95.00th=[ 1603], | 99.00th=[ 1603], 99.50th=[ 1603], 99.90th=[ 1603], 99.95th=[ 1603], | 99.99th=[ 1603] bw ( KiB/s): min= 7907, max= 8192, per=100.00%, avg=8049.50, stdev=201.53, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 500=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=4.47%, ctx=52, 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=4277KiB/s (4379kB/s), 1069KiB/s-4558KiB/s (1095kB/s-4667kB/s), io=16.0MiB (16.8MB), run=2696-3831msec WRITE: bw=8037KiB/s (8230kB/s), 2138KiB/s-4224KiB/s (2190kB/s-4326kB/s), io=32.0MiB (33.6MB), run=2909-4077msec rand-rw: (groupid=0, jobs=1): err= 0: pid=175192: Mon Aug 24 18:14:46 2026 read: IOPS=1, BW=6440KiB/s (6595kB/s)(12.0MiB/1908msec) clat (msec): min=295, max=1198, avg=630.36, stdev=494.74 lat (msec): min=295, max=1198, avg=630.36, stdev=494.74 clat percentiles (msec): | 1.00th=[ 296], 5.00th=[ 296], 10.00th=[ 296], 20.00th=[ 296], | 30.00th=[ 296], 40.00th=[ 397], 50.00th=[ 397], 60.00th=[ 397], | 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=11346, max=11346, per=100.00%, avg=11346.00, stdev= 0.00, samples=1 iops : min= 2, max= 2, avg= 2.00, stdev= 0.00, samples=1 lat (msec) : 500=66.67%, 2000=33.33% cpu : usr=0.00%, sys=5.93%, ctx=52, 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=175193: Mon Aug 24 18:14:46 2026 read: IOPS=0, BW=889KiB/s (911kB/s)(4096KiB/4605msec) clat (nsec): min=1160.2M, max=1160.2M, avg=1160151696.00, stdev= 0.00 lat (nsec): min=1160.2M, max=1160.2M, avg=1160154352.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1167], 5.00th=[ 1167], 10.00th=[ 1167], 20.00th=[ 1167], | 30.00th=[ 1167], 40.00th=[ 1167], 50.00th=[ 1167], 60.00th=[ 1167], | 70.00th=[ 1167], 80.00th=[ 1167], 90.00th=[ 1167], 95.00th=[ 1167], | 99.00th=[ 1167], 99.50th=[ 1167], 99.90th=[ 1167], 99.95th=[ 1167], | 99.99th=[ 1167] bw ( KiB/s): min= 8143, max= 8143, per=100.00%, avg=8143.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=1779KiB/s (1822kB/s)(8192KiB/4605msec); 0 zone resets clat (msec): min=514, max=2665, avg=1590.07, stdev=1520.77 lat (msec): min=523, max=2666, avg=1594.84, stdev=1514.88 clat percentiles (msec): | 1.00th=[ 514], 5.00th=[ 514], 10.00th=[ 514], 20.00th=[ 514], | 30.00th=[ 514], 40.00th=[ 514], 50.00th=[ 514], 60.00th=[ 2668], | 70.00th=[ 2668], 80.00th=[ 2668], 90.00th=[ 2668], 95.00th=[ 2668], | 99.00th=[ 2668], 99.50th=[ 2668], 99.90th=[ 2668], 99.95th=[ 2668], | 99.99th=[ 2668] bw ( KiB/s): min= 8062, max= 8062, per=100.00%, avg=8062.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 750=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=2.65%, ctx=70, 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=175195: Mon Aug 24 18:14:46 2026 write: IOPS=0, BW=3590KiB/s (3676kB/s)(12.0MiB/3423msec); 0 zone resets clat (msec): min=637, max=1759, avg=1122.22, stdev=576.41 lat (msec): min=637, max=1759, avg=1122.64, stdev=576.25 clat percentiles (msec): | 1.00th=[ 634], 5.00th=[ 634], 10.00th=[ 634], 20.00th=[ 634], | 30.00th=[ 634], 40.00th=[ 969], 50.00th=[ 969], 60.00th=[ 969], | 70.00th=[ 1754], 80.00th=[ 1754], 90.00th=[ 1754], 95.00th=[ 1754], | 99.00th=[ 1754], 99.50th=[ 1754], 99.90th=[ 1754], 99.95th=[ 1754], | 99.99th=[ 1754] bw ( KiB/s): min= 8031, max= 8110, per=100.00%, avg=8070.50, stdev=55.86, 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=6.37%, ctx=110, 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=175196: Mon Aug 24 18:14:46 2026 write: IOPS=1, BW=4692KiB/s (4804kB/s)(12.0MiB/2619msec); 0 zone resets clat (msec): min=535, max=1209, avg=821.02, stdev=348.63 lat (msec): min=535, max=1209, avg=822.21, stdev=348.29 clat percentiles (msec): | 1.00th=[ 535], 5.00th=[ 535], 10.00th=[ 535], 20.00th=[ 535], | 30.00th=[ 535], 40.00th=[ 718], 50.00th=[ 718], 60.00th=[ 718], | 70.00th=[ 1217], 80.00th=[ 1217], 90.00th=[ 1217], 95.00th=[ 1217], | 99.00th=[ 1217], 99.50th=[ 1217], 99.90th=[ 1217], 99.95th=[ 1217], | 99.99th=[ 1217] bw ( KiB/s): min= 5580, max= 8143, per=96.44%, avg=6861.50, stdev=1812.31, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=66.67%, 2000=33.33% cpu : usr=0.00%, sys=3.89%, ctx=47, 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=3558KiB/s (3643kB/s), 889KiB/s-6440KiB/s (911kB/s-6595kB/s), io=16.0MiB (16.8MB), run=1908-4605msec WRITE: bw=7116KiB/s (7287kB/s), 1779KiB/s-4692KiB/s (1822kB/s-4804kB/s), io=32.0MiB (33.6MB), run=2619-4605msec