== sanity test 398b: DIO and buffer IO race ============== 09:55:47 (1787752547) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 5.61406 s, 9.0 MB/s mix direct rw 4096 by fio with 4 jobs... mix buffer rw 4096 by fio with 4 jobs... rand-rw: (g=0): rw=randrw, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=psync, iodepth=16 ... fio-3.19 Starting 4 processes rand-rw: (g=0): rw=randrw, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=psync, iodepth=16 ... fio-3.19 Starting 4 processes rand-rw: (groupid=0, jobs=1): err= 0: pid=144171: Wed Aug 26 09:58:03 2026 read: IOPS=12, BW=51.6KiB/s (52.8kB/s)(5992KiB/116206msec) clat (usec): min=32, max=312913, avg=36454.18, stdev=28512.87 lat (usec): min=32, max=312915, avg=36456.05, stdev=28512.80 clat percentiles (usec): | 1.00th=[ 50], 5.00th=[ 64], 10.00th=[ 105], 20.00th=[ 16712], | 30.00th=[ 22414], 40.00th=[ 26346], 50.00th=[ 30802], 60.00th=[ 36963], | 70.00th=[ 44827], 80.00th=[ 54789], 90.00th=[ 70779], 95.00th=[ 82314], | 99.00th=[133694], 99.50th=[158335], 99.90th=[304088], 99.95th=[312476], | 99.99th=[312476] bw ( KiB/s): min= 7, max= 112, per=25.75%, avg=51.77, stdev=20.65, samples=226 iops : min= 1, max= 28, avg=12.31, stdev= 5.21, samples=226 write: IOPS=13, BW=54.2KiB/s (55.5kB/s)(6296KiB/116206msec); 0 zone resets clat (usec): min=1135, max=941748, avg=38804.64, stdev=46649.44 lat (usec): min=1137, max=941750, avg=38807.30, stdev=46649.01 clat percentiles (usec): | 1.00th=[ 1221], 5.00th=[ 1483], 10.00th=[ 2507], 20.00th=[ 4817], | 30.00th=[ 8586], 40.00th=[ 16581], 50.00th=[ 27919], 60.00th=[ 38536], | 70.00th=[ 49546], 80.00th=[ 66323], 90.00th=[ 89654], 95.00th=[109577], | 99.00th=[177210], 99.50th=[212861], 99.90th=[557843], 99.95th=[943719], | 99.99th=[943719] bw ( KiB/s): min= 7, max= 149, per=25.66%, avg=53.89, stdev=23.52, samples=228 iops : min= 1, max= 37, avg=12.83, stdev= 5.90, samples=228 lat (usec) : 50=0.59%, 100=4.23%, 250=0.55%, 500=0.13%, 750=0.07% lat (usec) : 1000=0.07% lat (msec) : 2=4.17%, 4=4.33%, 10=8.98%, 20=10.64%, 50=39.06% lat (msec) : 100=22.49%, 250=4.52%, 500=0.10%, 750=0.03%, 1000=0.03% cpu : usr=0.08%, sys=5.89%, ctx=6550, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1498,1574,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144172: Wed Aug 26 09:58:03 2026 read: IOPS=12, BW=50.3KiB/s (51.5kB/s)(5940KiB/118038msec) clat (usec): min=36, max=291542, avg=38100.94, stdev=28268.44 lat (usec): min=36, max=291543, avg=38104.47, stdev=28267.42 clat percentiles (usec): | 1.00th=[ 50], 5.00th=[ 65], 10.00th=[ 8225], 20.00th=[ 18482], | 30.00th=[ 23200], 40.00th=[ 27657], 50.00th=[ 32375], 60.00th=[ 39060], | 70.00th=[ 46924], 80.00th=[ 56361], 90.00th=[ 71828], 95.00th=[ 84411], | 99.00th=[143655], 99.50th=[170918], 99.90th=[263193], 99.95th=[291505], | 99.99th=[291505] bw ( KiB/s): min= 7, max= 103, per=24.86%, avg=49.98, stdev=21.33, samples=231 iops : min= 1, max= 25, avg=11.85, stdev= 5.34, samples=231 write: IOPS=13, BW=53.8KiB/s (55.1kB/s)(6348KiB/118038msec); 0 zone resets clat (usec): min=886, max=803021, avg=38446.45, stdev=44061.21 lat (usec): min=887, max=803023, avg=38450.43, stdev=44060.11 clat percentiles (usec): | 1.00th=[ 1221], 5.00th=[ 1450], 10.00th=[ 2278], 20.00th=[ 5276], | 30.00th=[ 9110], 40.00th=[ 17433], 50.00th=[ 26870], 60.00th=[ 36963], | 70.00th=[ 50594], 80.00th=[ 63177], 90.00th=[ 90702], 95.00th=[115868], | 99.00th=[168821], 99.50th=[214959], 99.90th=[476054], 99.95th=[801113], | 99.99th=[801113] bw ( KiB/s): min= 7, max= 167, per=25.38%, avg=53.29, stdev=22.25, samples=231 iops : min= 1, max= 41, avg=12.68, stdev= 5.61, samples=231 lat (usec) : 50=0.46%, 100=3.84%, 250=0.36%, 500=0.03%, 750=0.03% lat (usec) : 1000=0.03% lat (msec) : 2=4.69%, 4=3.68%, 10=8.11%, 20=12.01%, 50=38.44% lat (msec) : 100=23.50%, 250=4.62%, 500=0.16%, 1000=0.03% cpu : usr=0.09%, sys=5.96%, ctx=6760, 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=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=144173: Wed Aug 26 09:58:03 2026 read: IOPS=12, BW=51.8KiB/s (53.1kB/s)(6028KiB/116265msec) clat (usec): min=30, max=603934, avg=37942.39, stdev=32942.19 lat (usec): min=31, max=603934, avg=37945.35, stdev=32943.29 clat percentiles (usec): | 1.00th=[ 51], 5.00th=[ 63], 10.00th=[ 84], 20.00th=[ 17957], | 30.00th=[ 23200], 40.00th=[ 27657], 50.00th=[ 32900], 60.00th=[ 39060], | 70.00th=[ 46400], 80.00th=[ 56361], 90.00th=[ 72877], 95.00th=[ 86508], | 99.00th=[125305], 99.50th=[145753], 99.90th=[509608], 99.95th=[599786], | 99.99th=[599786] bw ( KiB/s): min= 7, max= 134, per=25.57%, avg=51.40, stdev=20.42, samples=228 iops : min= 1, max= 33, avg=12.21, stdev= 5.12, samples=228 write: IOPS=13, BW=53.8KiB/s (55.1kB/s)(6260KiB/116265msec); 0 zone resets clat (usec): min=1039, max=902637, avg=37439.51, stdev=42026.83 lat (usec): min=1039, max=902640, avg=37444.16, stdev=42026.93 clat percentiles (usec): | 1.00th=[ 1221], 5.00th=[ 1401], 10.00th=[ 2008], 20.00th=[ 4490], | 30.00th=[ 9110], 40.00th=[ 17695], 50.00th=[ 27132], 60.00th=[ 36963], | 70.00th=[ 50070], 80.00th=[ 64750], 90.00th=[ 87557], 95.00th=[105382], | 99.00th=[147850], 99.50th=[181404], 99.90th=[242222], 99.95th=[901776], | 99.99th=[901776] bw ( KiB/s): min= 7, max= 111, per=25.40%, avg=53.35, stdev=19.63, samples=228 iops : min= 1, max= 27, avg=12.70, stdev= 4.97, samples=228 lat (usec) : 50=0.49%, 100=4.69%, 250=0.55%, 500=0.10%, 750=0.07% lat (usec) : 1000=0.03% lat (msec) : 2=5.18%, 4=4.13%, 10=7.26%, 20=10.97%, 50=38.48% lat (msec) : 100=23.60%, 250=4.36%, 750=0.07%, 1000=0.03% cpu : usr=0.10%, sys=6.07%, ctx=6611, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144174: Wed Aug 26 09:58:03 2026 read: IOPS=12, BW=50.7KiB/s (51.9kB/s)(6052KiB/119400msec) clat (usec): min=35, max=946034, avg=38025.43, stdev=37876.53 lat (usec): min=35, max=946035, avg=38028.41, stdev=37875.69 clat percentiles (usec): | 1.00th=[ 46], 5.00th=[ 64], 10.00th=[ 116], 20.00th=[ 17433], | 30.00th=[ 22152], 40.00th=[ 27657], 50.00th=[ 33162], 60.00th=[ 38536], | 70.00th=[ 46400], 80.00th=[ 55837], 90.00th=[ 70779], 95.00th=[ 84411], | 99.00th=[122160], 99.50th=[175113], 99.90th=[480248], 99.95th=[943719], | 99.99th=[943719] bw ( KiB/s): min= 7, max= 135, per=25.23%, avg=50.71, stdev=22.90, samples=231 iops : min= 1, max= 33, avg=12.04, stdev= 5.75, samples=231 write: IOPS=13, BW=52.2KiB/s (53.5kB/s)(6236KiB/119400msec); 0 zone resets clat (usec): min=1018, max=378438, avg=39405.65, stdev=41978.91 lat (usec): min=1019, max=378440, avg=39410.55, stdev=41976.49 clat percentiles (usec): | 1.00th=[ 1188], 5.00th=[ 1401], 10.00th=[ 2073], 20.00th=[ 4359], | 30.00th=[ 7963], 40.00th=[ 17171], 50.00th=[ 28967], 60.00th=[ 39584], | 70.00th=[ 50594], 80.00th=[ 68682], 90.00th=[ 92799], 95.00th=[117965], | 99.00th=[177210], 99.50th=[196084], 99.90th=[350225], 99.95th=[379585], | 99.99th=[379585] bw ( KiB/s): min= 7, max= 140, per=24.58%, avg=51.62, stdev=21.46, samples=234 iops : min= 1, max= 35, avg=12.27, stdev= 5.40, samples=234 lat (usec) : 50=0.59%, 100=4.23%, 250=0.36%, 500=0.10%, 750=0.07% lat (msec) : 2=5.01%, 4=4.49%, 10=8.17%, 20=10.87%, 50=37.86% lat (msec) : 100=23.01%, 250=4.92%, 500=0.29%, 1000=0.03% cpu : usr=0.09%, sys=5.93%, ctx=6744, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1513,1559,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=201KiB/s (206kB/s), 50.3KiB/s-51.8KiB/s (51.5kB/s-53.1kB/s), io=23.4MiB (24.6MB), run=116206-119400msec WRITE: bw=211KiB/s (216kB/s), 52.2KiB/s-54.2KiB/s (53.5kB/s-55.5kB/s), io=24.6MiB (25.7MB), run=116206-119400msec fio: pid=144177, err=5/file:backend.c:481, func=full resid, error=Input/output error rand-rw: (groupid=0, jobs=1): err= 0: pid=144176: Wed Aug 26 10:00:34 2026 read: IOPS=5, BW=22.3KiB/s (22.8kB/s)(5992KiB/268810msec) clat (msec): min=5, max=860, avg=36.03, stdev=37.38 lat (msec): min=5, max=860, avg=36.03, stdev=37.38 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 16], | 30.00th=[ 20], 40.00th=[ 23], 50.00th=[ 26], 60.00th=[ 31], | 70.00th=[ 37], 80.00th=[ 49], 90.00th=[ 70], 95.00th=[ 96], | 99.00th=[ 157], 99.50th=[ 192], 99.90th=[ 338], 99.95th=[ 860], | 99.99th=[ 860] bw ( KiB/s): min= 7, max= 87, per=29.82%, avg=24.75, stdev=15.39, samples=468 iops : min= 1, max= 21, avg= 5.56, stdev= 3.88, samples=468 write: IOPS=5, BW=23.4KiB/s (23.0kB/s)(6296KiB/268810msec); 0 zone resets clat (msec): min=42, max=577, avg=136.40, stdev=59.81 lat (msec): min=42, max=577, avg=136.40, stdev=59.81 clat percentiles (msec): | 1.00th=[ 52], 5.00th=[ 66], 10.00th=[ 74], 20.00th=[ 88], | 30.00th=[ 101], 40.00th=[ 113], 50.00th=[ 126], 60.00th=[ 140], | 70.00th=[ 157], 80.00th=[ 178], 90.00th=[ 213], 95.00th=[ 247], | 99.00th=[ 330], 99.50th=[ 422], 99.90th=[ 514], 99.95th=[ 575], | 99.99th=[ 575] bw ( KiB/s): min= 7, max= 48, per=26.37%, avg=22.95, stdev= 9.41, samples=529 iops : min= 1, max= 12, avg= 5.11, stdev= 2.37, samples=529 lat (msec) : 10=1.95%, 20=13.87%, 50=23.96%, 100=22.30%, 250=35.42% lat (msec) : 500=2.41%, 750=0.07%, 1000=0.03% cpu : usr=0.05%, sys=1.33%, ctx=5568, 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= 5 (file:backend.c:481, func=full resid, error=Input/output error): pid=144177: Wed Aug 26 10:00:34 2026 read: IOPS=5, BW=20.4KiB/s (20.9kB/s)(4356KiB/213725msec) clat (msec): min=6, max=982, avg=39.50, stdev=48.15 lat (msec): min=6, max=982, avg=39.51, stdev=48.15 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 14], 20.00th=[ 17], | 30.00th=[ 20], 40.00th=[ 24], 50.00th=[ 28], 60.00th=[ 33], | 70.00th=[ 41], 80.00th=[ 56], 90.00th=[ 75], 95.00th=[ 100], | 99.00th=[ 169], 99.50th=[ 330], 99.90th=[ 567], 99.95th=[ 986], | 99.99th=[ 986] bw ( KiB/s): min= 7, max= 72, per=28.00%, avg=23.24, stdev=13.69, samples=360 iops : min= 1, max= 18, avg= 5.18, stdev= 3.47, samples=360 write: IOPS=5, BW=21.9KiB/s (22.4kB/s)(4680KiB/213725msec); 0 zone resets clat (msec): min=44, max=410, avg=145.75, stdev=57.44 lat (msec): min=44, max=410, avg=145.76, stdev=57.44 clat percentiles (msec): | 1.00th=[ 53], 5.00th=[ 68], 10.00th=[ 81], 20.00th=[ 95], | 30.00th=[ 110], 40.00th=[ 125], 50.00th=[ 138], 60.00th=[ 153], | 70.00th=[ 169], 80.00th=[ 188], 90.00th=[ 222], 95.00th=[ 253], | 99.00th=[ 317], 99.50th=[ 355], 99.90th=[ 380], 99.95th=[ 409], | 99.99th=[ 409] bw ( KiB/s): min= 7, max= 48, per=24.76%, avg=21.54, stdev= 8.72, samples=418 iops : min= 1, max= 12, avg= 4.76, stdev= 2.23, samples=418 lat (msec) : 10=1.37%, 20=13.45%, 50=22.96%, 100=20.22%, 250=38.85% lat (msec) : 500=3.01%, 750=0.04%, 1000=0.04% cpu : usr=0.05%, sys=1.19%, ctx=3743, 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=1090,1170,0,0 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=144178: Wed Aug 26 10:00:34 2026 read: IOPS=5, BW=22.4KiB/s (22.0kB/s)(6028KiB/268922msec) clat (msec): min=6, max=383, avg=37.03, stdev=32.48 lat (msec): min=6, max=383, avg=37.03, stdev=32.48 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 11], 10.00th=[ 14], 20.00th=[ 17], | 30.00th=[ 21], 40.00th=[ 24], 50.00th=[ 28], 60.00th=[ 32], | 70.00th=[ 39], 80.00th=[ 50], 90.00th=[ 71], 95.00th=[ 96], | 99.00th=[ 165], 99.50th=[ 203], 99.90th=[ 355], 99.95th=[ 384], | 99.99th=[ 384] bw ( KiB/s): min= 7, max= 95, per=29.28%, avg=24.30, stdev=15.61, samples=479 iops : min= 1, max= 23, avg= 5.45, stdev= 3.92, samples=479 write: IOPS=5, BW=23.3KiB/s (23.8kB/s)(6260KiB/268922msec); 0 zone resets clat (msec): min=38, max=1039, avg=136.03, stdev=65.46 lat (msec): min=38, max=1039, avg=136.04, stdev=65.46 clat percentiles (msec): | 1.00th=[ 54], 5.00th=[ 66], 10.00th=[ 74], 20.00th=[ 87], | 30.00th=[ 99], 40.00th=[ 109], 50.00th=[ 123], 60.00th=[ 138], | 70.00th=[ 155], 80.00th=[ 176], 90.00th=[ 213], 95.00th=[ 251], | 99.00th=[ 338], 99.50th=[ 435], 99.90th=[ 617], 99.95th=[ 1036], | 99.99th=[ 1036] bw ( KiB/s): min= 7, max= 47, per=26.25%, avg=22.84, stdev= 9.61, samples=528 iops : min= 1, max= 11, avg= 5.08, stdev= 2.43, samples=528 lat (msec) : 10=1.53%, 20=13.25%, 50=24.90%, 100=23.34%, 250=34.31% lat (msec) : 500=2.57%, 750=0.07%, 2000=0.03% cpu : usr=0.05%, sys=1.33%, ctx=5443, 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=144179: Wed Aug 26 10:00:34 2026 read: IOPS=5, BW=22.5KiB/s (23.0kB/s)(6052KiB/269050msec) clat (msec): min=6, max=317, avg=36.81, stdev=32.84 lat (msec): min=6, max=317, avg=36.82, stdev=32.84 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 20], 40.00th=[ 23], 50.00th=[ 28], 60.00th=[ 32], | 70.00th=[ 39], 80.00th=[ 49], 90.00th=[ 71], 95.00th=[ 95], | 99.00th=[ 176], 99.50th=[ 215], 99.90th=[ 305], 99.95th=[ 317], | 99.99th=[ 317] bw ( KiB/s): min= 7, max= 80, per=29.35%, avg=24.36, stdev=15.75, samples=480 iops : min= 1, max= 20, avg= 5.47, stdev= 3.94, samples=480 write: IOPS=5, BW=23.2KiB/s (23.7kB/s)(6236KiB/269050msec); 0 zone resets clat (msec): min=38, max=1157, avg=136.74, stdev=63.96 lat (msec): min=38, max=1157, avg=136.74, stdev=63.96 clat percentiles (msec): | 1.00th=[ 52], 5.00th=[ 66], 10.00th=[ 74], 20.00th=[ 87], | 30.00th=[ 100], 40.00th=[ 112], 50.00th=[ 127], 60.00th=[ 140], | 70.00th=[ 157], 80.00th=[ 178], 90.00th=[ 215], 95.00th=[ 245], | 99.00th=[ 317], 99.50th=[ 376], 99.90th=[ 617], 99.95th=[ 1167], | 99.99th=[ 1167] bw ( KiB/s): min= 7, max= 55, per=26.13%, avg=22.74, stdev= 9.50, samples=528 iops : min= 1, max= 13, avg= 5.05, stdev= 2.41, samples=528 lat (msec) : 10=1.86%, 20=13.87%, 50=24.58%, 100=22.36%, 250=35.06% lat (msec) : 500=2.21%, 750=0.03%, 2000=0.03% cpu : usr=0.05%, sys=1.35%, ctx=5599, 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=83.4KiB/s (85.4kB/s), 20.4KiB/s-22.5KiB/s (20.9kB/s-23.0kB/s), io=21.9MiB (22.0MB), run=213725-269050msec WRITE: bw=87.2KiB/s (89.3kB/s), 21.9KiB/s-23.4KiB/s (22.4kB/s-23.0kB/s), io=22.9MiB (24.0MB), run=213725-269050msec 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=144234: Wed Aug 26 10:01:20 2026 read: IOPS=10, BW=173KiB/s (177kB/s)(5920KiB/34304msec) clat (usec): min=37, max=213476, avg=47204.12, stdev=39684.95 lat (usec): min=37, max=213477, avg=47215.00, stdev=39673.99 clat percentiles (usec): | 1.00th=[ 44], 5.00th=[ 67], 10.00th=[ 80], 20.00th=[ 103], | 30.00th=[ 22414], 40.00th=[ 36963], 50.00th=[ 44303], 60.00th=[ 53216], | 70.00th=[ 66323], 80.00th=[ 81265], 90.00th=[ 99091], 95.00th=[113771], | 99.00th=[181404], 99.50th=[187696], 99.90th=[212861], 99.95th=[212861], | 99.99th=[212861] bw ( KiB/s): min= 29, max= 347, per=25.72%, avg=171.84, stdev=66.46, samples=67 iops : min= 1, max= 21, avg= 9.97, stdev= 4.18, samples=67 write: IOPS=11, BW=186KiB/s (190kB/s)(6368KiB/34304msec); 0 zone resets clat (usec): min=1602, max=607380, avg=42007.47, stdev=52298.20 lat (usec): min=1604, max=607384, avg=42010.91, stdev=52298.41 clat percentiles (usec): | 1.00th=[ 1860], 5.00th=[ 2180], 10.00th=[ 3916], 20.00th=[ 7242], | 30.00th=[ 10945], 40.00th=[ 16909], 50.00th=[ 28181], 60.00th=[ 37487], | 70.00th=[ 48497], 80.00th=[ 65274], 90.00th=[101188], 95.00th=[130548], | 99.00th=[244319], 99.50th=[308282], 99.90th=[608175], 99.95th=[608175], | 99.99th=[608175] bw ( KiB/s): min= 30, max= 442, per=26.35%, avg=185.27, stdev=80.64, samples=67 iops : min= 1, max= 27, avg=10.82, stdev= 5.14, samples=67 lat (usec) : 50=0.78%, 100=8.59%, 250=2.21%, 500=0.13%, 750=0.26% lat (msec) : 2=2.08%, 4=4.04%, 10=8.85%, 20=9.38%, 50=28.65% lat (msec) : 100=25.13%, 250=9.64%, 500=0.13%, 750=0.13% cpu : usr=0.08%, sys=6.03%, ctx=1549, 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=144235: Wed Aug 26 10:01:20 2026 read: IOPS=10, BW=160KiB/s (164kB/s)(5744KiB/35844msec) clat (usec): min=37, max=347609, avg=50463.13, stdev=45278.71 lat (usec): min=37, max=347611, avg=50510.61, stdev=45304.92 clat percentiles (usec): | 1.00th=[ 45], 5.00th=[ 68], 10.00th=[ 88], 20.00th=[ 578], | 30.00th=[ 27919], 40.00th=[ 38011], 50.00th=[ 45876], 60.00th=[ 54789], | 70.00th=[ 63177], 80.00th=[ 78119], 90.00th=[ 99091], 95.00th=[116917], | 99.00th=[250610], 99.50th=[278922], 99.90th=[346031], 99.95th=[346031], | 99.99th=[346031] bw ( KiB/s): min= 26, max= 415, per=24.06%, avg=160.74, stdev=72.17, samples=70 iops : min= 1, max= 25, avg= 9.26, stdev= 4.53, samples=70 write: IOPS=11, BW=183KiB/s (187kB/s)(6544KiB/35844msec); 0 zone resets clat (usec): min=1623, max=455571, avg=42714.45, stdev=48089.77 lat (usec): min=1625, max=455575, avg=42717.54, stdev=48089.45 clat percentiles (usec): | 1.00th=[ 1680], 5.00th=[ 2573], 10.00th=[ 4015], 20.00th=[ 7242], | 30.00th=[ 10945], 40.00th=[ 17171], 50.00th=[ 24773], 60.00th=[ 36963], | 70.00th=[ 54264], 80.00th=[ 74974], 90.00th=[101188], 95.00th=[124257], | 99.00th=[200279], 99.50th=[212861], 99.90th=[455082], 99.95th=[455082], | 99.99th=[455082] bw ( KiB/s): min= 31, max= 445, per=25.91%, avg=182.14, stdev=92.56, samples=70 iops : min= 1, max= 27, avg=10.63, stdev= 5.84, samples=70 lat (usec) : 50=0.91%, 100=5.21%, 250=2.34%, 500=0.78%, 750=0.13% lat (msec) : 2=1.56%, 4=3.78%, 10=10.16%, 20=8.98%, 50=28.39% lat (msec) : 100=27.99%, 250=8.98%, 500=0.78% cpu : usr=0.08%, sys=5.38%, ctx=1497, 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=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=144236: Wed Aug 26 10:01:20 2026 read: IOPS=11, BW=176KiB/s (180kB/s)(6256KiB/35499msec) clat (usec): min=40, max=620477, avg=50491.18, stdev=54404.01 lat (usec): min=41, max=620479, avg=50492.81, stdev=54404.08 clat percentiles (usec): | 1.00th=[ 46], 5.00th=[ 65], 10.00th=[ 80], 20.00th=[ 1205], | 30.00th=[ 28967], 40.00th=[ 35914], 50.00th=[ 42730], 60.00th=[ 51119], | 70.00th=[ 64750], 80.00th=[ 74974], 90.00th=[ 98042], 95.00th=[125305], | 99.00th=[244319], 99.50th=[505414], 99.90th=[616563], 99.95th=[616563], | 99.99th=[616563] bw ( KiB/s): min= 29, max= 473, per=26.40%, avg=176.35, stdev=79.01, samples=69 iops : min= 1, max= 29, avg=10.26, stdev= 5.01, samples=69 write: IOPS=10, BW=170KiB/s (174kB/s)(6032KiB/35499msec); 0 zone resets clat (usec): min=1602, max=400175, avg=40988.51, stdev=43648.70 lat (usec): min=1605, max=400179, avg=41013.52, stdev=43645.13 clat percentiles (usec): | 1.00th=[ 1811], 5.00th=[ 2376], 10.00th=[ 3949], 20.00th=[ 6980], | 30.00th=[ 10290], 40.00th=[ 15008], 50.00th=[ 27132], 60.00th=[ 37487], | 70.00th=[ 51119], 80.00th=[ 74974], 90.00th=[ 96994], 95.00th=[122160], | 99.00th=[175113], 99.50th=[183501], 99.90th=[400557], 99.95th=[400557], | 99.99th=[400557] bw ( KiB/s): min= 30, max= 433, per=23.65%, avg=166.23, stdev=87.90, samples=69 iops : min= 1, max= 27, avg= 9.62, stdev= 5.59, samples=69 lat (usec) : 50=0.91%, 100=6.51%, 250=1.56%, 500=0.52%, 750=0.39% lat (usec) : 1000=0.13% lat (msec) : 2=1.30%, 4=4.17%, 10=9.51%, 20=8.59%, 50=29.95% lat (msec) : 100=27.08%, 250=8.85%, 500=0.26%, 750=0.26% cpu : usr=0.07%, sys=5.64%, ctx=1569, 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=144237: Wed Aug 26 10:01:20 2026 read: IOPS=10, BW=174KiB/s (178kB/s)(6032KiB/34721msec) clat (usec): min=51, max=353987, avg=48662.46, stdev=41316.20 lat (usec): min=52, max=353989, avg=48664.00, stdev=41316.26 clat percentiles (usec): | 1.00th=[ 56], 5.00th=[ 69], 10.00th=[ 86], 20.00th=[ 17433], | 30.00th=[ 28705], 40.00th=[ 36963], 50.00th=[ 43779], 60.00th=[ 50070], | 70.00th=[ 61080], 80.00th=[ 74974], 90.00th=[ 99091], 95.00th=[116917], | 99.00th=[208667], 99.50th=[254804], 99.90th=[354419], 99.95th=[354419], | 99.99th=[354419] bw ( KiB/s): min= 31, max= 350, per=25.86%, avg=172.75, stdev=71.26, samples=67 iops : min= 1, max= 21, avg=10.03, stdev= 4.51, samples=67 write: IOPS=11, BW=180KiB/s (185kB/s)(6256KiB/34721msec); 0 zone resets clat (usec): min=1581, max=333203, avg=41319.00, stdev=43104.08 lat (usec): min=1582, max=333206, avg=41331.07, stdev=43112.45 clat percentiles (usec): | 1.00th=[ 1778], 5.00th=[ 2409], 10.00th=[ 3523], 20.00th=[ 6783], | 30.00th=[ 9896], 40.00th=[ 16188], 50.00th=[ 26346], 60.00th=[ 41681], | 70.00th=[ 55313], 80.00th=[ 73925], 90.00th=[ 94897], 95.00th=[122160], | 99.00th=[183501], 99.50th=[221250], 99.90th=[333448], 99.95th=[333448], | 99.99th=[333448] bw ( KiB/s): min= 31, max= 382, per=26.03%, avg=182.98, stdev=74.86, samples=66 iops : min= 1, max= 23, avg=10.68, stdev= 4.70, samples=66 lat (usec) : 100=6.64%, 250=1.56%, 500=0.65% lat (msec) : 2=0.78%, 4=5.73%, 10=9.77%, 20=8.07%, 50=30.21% lat (msec) : 100=27.21%, 250=8.98%, 500=0.39% cpu : usr=0.12%, sys=5.60%, ctx=1467, 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=668KiB/s (684kB/s), 160KiB/s-176KiB/s (164kB/s-180kB/s), io=23.4MiB (24.5MB), run=34304-35844msec WRITE: bw=703KiB/s (720kB/s), 170KiB/s-186KiB/s (174kB/s-190kB/s), io=24.6MiB (25.8MB), run=34304-35844msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144239: Wed Aug 26 10:02:25 2026 read: IOPS=3, BW=59.4KiB/s (60.8kB/s)(5920KiB/99636msec) clat (msec): min=7, max=354, avg=56.72, stdev=50.51 lat (msec): min=7, max=354, avg=56.73, stdev=50.51 clat percentiles (msec): | 1.00th=[ 12], 5.00th=[ 16], 10.00th=[ 20], 20.00th=[ 25], | 30.00th=[ 31], 40.00th=[ 37], 50.00th=[ 44], 60.00th=[ 49], | 70.00th=[ 58], 80.00th=[ 69], 90.00th=[ 105], 95.00th=[ 163], | 99.00th=[ 300], 99.50th=[ 321], 99.90th=[ 355], 99.95th=[ 355], | 99.99th=[ 355] bw ( KiB/s): min= 30, max= 286, per=31.47%, avg=75.54, stdev=50.17, samples=153 iops : min= 1, max= 17, avg= 3.86, stdev= 3.15, samples=153 write: IOPS=3, BW=63.9KiB/s (65.4kB/s)(6368KiB/99636msec); 0 zone resets clat (msec): min=55, max=787, avg=197.34, stdev=92.65 lat (msec): min=55, max=787, avg=197.35, stdev=92.65 clat percentiles (msec): | 1.00th=[ 64], 5.00th=[ 81], 10.00th=[ 94], 20.00th=[ 120], | 30.00th=[ 136], 40.00th=[ 167], 50.00th=[ 184], 60.00th=[ 207], | 70.00th=[ 230], 80.00th=[ 264], 90.00th=[ 300], 95.00th=[ 372], | 99.00th=[ 464], 99.50th=[ 667], 99.90th=[ 785], 99.95th=[ 785], | 99.99th=[ 785] bw ( KiB/s): min= 30, max= 159, per=26.20%, avg=66.03, stdev=30.11, samples=188 iops : min= 1, max= 9, avg= 3.27, stdev= 1.91, samples=188 lat (msec) : 10=0.13%, 20=5.60%, 50=23.83%, 100=19.40%, 250=38.02% lat (msec) : 500=12.76%, 750=0.13%, 1000=0.13% cpu : usr=0.03%, sys=1.14%, ctx=1381, 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=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=144240: Wed Aug 26 10:02:25 2026 read: IOPS=3, BW=57.8KiB/s (59.2kB/s)(5744KiB/99298msec) clat (msec): min=8, max=528, avg=57.37, stdev=50.33 lat (msec): min=8, max=528, avg=57.37, stdev=50.33 clat percentiles (msec): | 1.00th=[ 13], 5.00th=[ 19], 10.00th=[ 22], 20.00th=[ 28], | 30.00th=[ 33], 40.00th=[ 40], 50.00th=[ 44], 60.00th=[ 51], | 70.00th=[ 61], 80.00th=[ 73], 90.00th=[ 96], 95.00th=[ 144], | 99.00th=[ 257], 99.50th=[ 330], 99.90th=[ 527], 99.95th=[ 527], | 99.99th=[ 527] bw ( KiB/s): min= 23, max= 255, per=30.38%, avg=72.92, stdev=46.41, samples=153 iops : min= 1, max= 15, avg= 3.71, stdev= 2.94, samples=153 write: IOPS=4, BW=65.9KiB/s (67.5kB/s)(6544KiB/99298msec); 0 zone resets clat (msec): min=58, max=649, avg=192.13, stdev=89.98 lat (msec): min=58, max=650, avg=192.13, stdev=89.97 clat percentiles (msec): | 1.00th=[ 69], 5.00th=[ 86], 10.00th=[ 96], 20.00th=[ 114], | 30.00th=[ 134], 40.00th=[ 153], 50.00th=[ 176], 60.00th=[ 201], | 70.00th=[ 224], 80.00th=[ 259], 90.00th=[ 313], 95.00th=[ 359], | 99.00th=[ 456], 99.50th=[ 531], 99.90th=[ 651], 99.95th=[ 651], | 99.99th=[ 651] bw ( KiB/s): min= 23, max= 159, per=26.43%, avg=66.61, stdev=31.31, samples=191 iops : min= 1, max= 9, avg= 3.30, stdev= 1.98, samples=191 lat (msec) : 10=0.13%, 20=3.39%, 50=24.35%, 100=20.44%, 250=39.58% lat (msec) : 500=11.59%, 750=0.52% cpu : usr=0.03%, sys=1.10%, ctx=1373, 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=144241: Wed Aug 26 10:02:25 2026 read: IOPS=4, BW=65.6KiB/s (67.2kB/s)(6256KiB/95391msec) clat (msec): min=8, max=292, avg=49.80, stdev=38.09 lat (msec): min=8, max=292, avg=49.80, stdev=38.09 clat percentiles (msec): | 1.00th=[ 11], 5.00th=[ 16], 10.00th=[ 18], 20.00th=[ 24], | 30.00th=[ 30], 40.00th=[ 35], 50.00th=[ 41], 60.00th=[ 45], | 70.00th=[ 54], 80.00th=[ 67], 90.00th=[ 92], 95.00th=[ 127], | 99.00th=[ 222], 99.50th=[ 253], 99.90th=[ 292], 99.95th=[ 292], | 99.99th=[ 292] bw ( KiB/s): min= 30, max= 286, per=34.18%, avg=82.03, stdev=53.88, samples=150 iops : min= 1, max= 17, avg= 4.28, stdev= 3.41, samples=150 write: IOPS=3, BW=63.2KiB/s (64.8kB/s)(6032KiB/95391msec); 0 zone resets clat (msec): min=59, max=679, avg=201.16, stdev=91.69 lat (msec): min=59, max=679, avg=201.17, stdev=91.69 clat percentiles (msec): | 1.00th=[ 71], 5.00th=[ 86], 10.00th=[ 97], 20.00th=[ 126], | 30.00th=[ 144], 40.00th=[ 165], 50.00th=[ 190], 60.00th=[ 211], | 70.00th=[ 232], 80.00th=[ 268], 90.00th=[ 313], 95.00th=[ 359], | 99.00th=[ 518], 99.50th=[ 642], 99.90th=[ 684], 99.95th=[ 684], | 99.99th=[ 684] bw ( KiB/s): min= 23, max= 159, per=25.68%, avg=64.71, stdev=26.92, samples=182 iops : min= 1, max= 9, avg= 3.18, stdev= 1.70, samples=182 lat (msec) : 10=0.39%, 20=5.99%, 50=27.21%, 100=18.75%, 250=35.42% lat (msec) : 500=11.59%, 750=0.65% cpu : usr=0.04%, sys=1.24%, ctx=1382, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144242: Wed Aug 26 10:02:25 2026 read: IOPS=3, BW=61.6KiB/s (63.1kB/s)(6032KiB/97887msec) clat (msec): min=8, max=533, avg=50.01, stdev=45.70 lat (msec): min=8, max=533, avg=50.01, stdev=45.70 clat percentiles (msec): | 1.00th=[ 11], 5.00th=[ 16], 10.00th=[ 19], 20.00th=[ 23], | 30.00th=[ 28], 40.00th=[ 33], 50.00th=[ 38], 60.00th=[ 44], | 70.00th=[ 53], 80.00th=[ 68], 90.00th=[ 93], 95.00th=[ 128], | 99.00th=[ 220], 99.50th=[ 309], 99.90th=[ 535], 99.95th=[ 535], | 99.99th=[ 535] bw ( KiB/s): min= 30, max= 253, per=33.52%, avg=80.45, stdev=54.37, samples=146 iops : min= 1, max= 15, avg= 4.17, stdev= 3.44, samples=146 write: IOPS=3, BW=63.9KiB/s (65.4kB/s)(6256KiB/97887msec); 0 zone resets clat (msec): min=58, max=678, avg=201.86, stdev=97.59 lat (msec): min=58, max=678, avg=201.86, stdev=97.59 clat percentiles (msec): | 1.00th=[ 68], 5.00th=[ 84], 10.00th=[ 96], 20.00th=[ 123], | 30.00th=[ 146], 40.00th=[ 163], 50.00th=[ 182], 60.00th=[ 203], | 70.00th=[ 234], 80.00th=[ 271], 90.00th=[ 330], 95.00th=[ 397], | 99.00th=[ 523], 99.50th=[ 651], 99.90th=[ 676], 99.95th=[ 676], | 99.99th=[ 676] bw ( KiB/s): min= 30, max= 159, per=25.77%, avg=64.93, stdev=29.23, samples=189 iops : min= 1, max= 9, avg= 3.20, stdev= 1.86, samples=189 lat (msec) : 10=0.39%, 20=7.03%, 50=25.91%, 100=17.97%, 250=35.29% lat (msec) : 500=12.76%, 750=0.65% cpu : usr=0.04%, sys=1.08%, ctx=1397, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=240KiB/s (246kB/s), 57.8KiB/s-65.6KiB/s (59.2kB/s-67.2kB/s), io=23.4MiB (24.5MB), run=95391-99636msec WRITE: bw=253KiB/s (259kB/s), 63.2KiB/s-65.9KiB/s (64.8kB/s-67.5kB/s), io=24.6MiB (25.8MB), run=95391-99636msec 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=144281: Wed Aug 26 10:02:40 2026 read: IOPS=1, BW=1569KiB/s (1607kB/s)(7168KiB/4568msec) clat (usec): min=661, max=571008, avg=342196.33, stdev=182054.66 lat (usec): min=662, max=571009, avg=342197.69, stdev=182054.52 clat percentiles (usec): | 1.00th=[ 660], 5.00th=[ 660], 10.00th=[ 660], 20.00th=[291505], | 30.00th=[304088], 40.00th=[304088], 50.00th=[354419], 60.00th=[371196], | 70.00th=[371196], 80.00th=[501220], 90.00th=[574620], 95.00th=[574620], | 99.00th=[574620], 99.50th=[574620], 99.90th=[574620], 99.95th=[574620], | 99.99th=[574620] bw ( KiB/s): min= 1969, max= 4087, per=77.26%, avg=2769.00, stdev=992.47, samples=4 iops : min= 1, max= 3, avg= 1.75, stdev= 0.96, samples=4 write: IOPS=1, BW=1121KiB/s (1148kB/s)(5120KiB/4568msec); 0 zone resets clat (msec): min=99, max=961, avg=432.29, stdev=319.31 lat (msec): min=99, max=962, avg=432.59, stdev=319.55 clat percentiles (msec): | 1.00th=[ 100], 5.00th=[ 100], 10.00th=[ 100], 20.00th=[ 100], | 30.00th=[ 317], 40.00th=[ 317], 50.00th=[ 384], 60.00th=[ 384], | 70.00th=[ 397], 80.00th=[ 397], 90.00th=[ 961], 95.00th=[ 961], | 99.00th=[ 961], 99.50th=[ 961], 99.90th=[ 961], 99.95th=[ 961], | 99.99th=[ 961] bw ( KiB/s): min= 1969, max= 4063, per=49.74%, avg=2496.00, stdev=1044.67, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 lat (usec) : 750=8.33% lat (msec) : 100=8.33%, 500=66.67%, 750=8.33%, 1000=8.33% cpu : usr=0.00%, sys=10.31%, ctx=220, 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=144282: Wed Aug 26 10:02:40 2026 read: IOPS=0, BW=358KiB/s (367kB/s)(2048KiB/5713msec) clat (msec): min=572, max=721, avg=646.94, stdev=104.81 lat (msec): min=572, max=721, avg=646.94, stdev=104.81 clat percentiles (msec): | 1.00th=[ 575], 5.00th=[ 575], 10.00th=[ 575], 20.00th=[ 575], | 30.00th=[ 575], 40.00th=[ 575], 50.00th=[ 575], 60.00th=[ 718], | 70.00th=[ 718], 80.00th=[ 718], 90.00th=[ 718], 95.00th=[ 718], | 99.00th=[ 718], 99.50th=[ 718], 99.90th=[ 718], 99.95th=[ 718], | 99.99th=[ 718] bw ( KiB/s): min= 2023, max= 2039, per=56.67%, avg=2031.00, stdev=11.31, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1792KiB/s (1835kB/s)(10.0MiB/5713msec); 0 zone resets clat (msec): min=114, max=813, avg=440.46, stdev=237.72 lat (msec): min=114, max=813, avg=440.71, stdev=237.59 clat percentiles (msec): | 1.00th=[ 114], 5.00th=[ 114], 10.00th=[ 114], 20.00th=[ 247], | 30.00th=[ 284], 40.00th=[ 292], 50.00th=[ 300], 60.00th=[ 456], | 70.00th=[ 510], 80.00th=[ 592], 90.00th=[ 802], 95.00th=[ 810], | 99.00th=[ 810], 99.50th=[ 810], 99.90th=[ 810], 99.95th=[ 810], | 99.99th=[ 810] bw ( KiB/s): min= 1969, max= 2043, per=40.03%, avg=2008.71, stdev=33.27, samples=7 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=7 lat (msec) : 250=16.67%, 500=33.33%, 750=33.33%, 1000=16.67% cpu : usr=0.00%, sys=8.95%, ctx=174, 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=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=144283: Wed Aug 26 10:02:40 2026 read: IOPS=1, BW=1333KiB/s (1365kB/s)(6144KiB/4609msec) clat (usec): min=876, max=830292, avg=263896.15, stdev=329316.13 lat (usec): min=877, max=830294, avg=263897.59, stdev=329316.09 clat percentiles (usec): | 1.00th=[ 873], 5.00th=[ 873], 10.00th=[ 873], 20.00th=[ 2933], | 30.00th=[ 2933], 40.00th=[ 13829], 50.00th=[ 13829], 60.00th=[362808], | 70.00th=[371196], 80.00th=[371196], 90.00th=[826278], 95.00th=[826278], | 99.00th=[826278], 99.50th=[826278], 99.90th=[826278], 99.95th=[826278], | 99.99th=[826278] bw ( KiB/s): min= 2031, max= 4087, per=94.54%, avg=3388.33, stdev=1175.66, samples=3 iops : min= 1, max= 3, avg= 2.33, stdev= 1.15, samples=3 write: IOPS=1, BW=1333KiB/s (1365kB/s)(6144KiB/4609msec); 0 zone resets clat (msec): min=164, max=925, avg=497.52, stdev=291.74 lat (msec): min=165, max=925, avg=498.41, stdev=291.06 clat percentiles (msec): | 1.00th=[ 165], 5.00th=[ 165], 10.00th=[ 165], 20.00th=[ 284], | 30.00th=[ 284], 40.00th=[ 321], 50.00th=[ 321], 60.00th=[ 584], | 70.00th=[ 718], 80.00th=[ 718], 90.00th=[ 927], 95.00th=[ 927], | 99.00th=[ 927], 99.50th=[ 927], 99.90th=[ 927], 99.95th=[ 927], | 99.99th=[ 927] bw ( KiB/s): min= 1976, max= 3038, per=44.02%, avg=2208.80, stdev=464.25, samples=5 iops : min= 1, max= 2, avg= 1.20, stdev= 0.45, samples=5 lat (usec) : 1000=8.33% lat (msec) : 4=8.33%, 20=8.33%, 250=8.33%, 500=33.33%, 750=16.67% lat (msec) : 1000=16.67% cpu : usr=0.04%, sys=9.01%, ctx=212, 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=144284: Wed Aug 26 10:02:40 2026 read: IOPS=0, BW=897KiB/s (919kB/s)(5120KiB/5705msec) clat (usec): min=511, max=223332, avg=94255.21, stdev=105074.54 lat (usec): min=512, max=223334, avg=94256.55, stdev=105074.39 clat percentiles (usec): | 1.00th=[ 510], 5.00th=[ 510], 10.00th=[ 510], 20.00th=[ 510], | 30.00th=[ 545], 40.00th=[ 545], 50.00th=[ 59507], 60.00th=[ 59507], | 70.00th=[187696], 80.00th=[187696], 90.00th=[223347], 95.00th=[223347], | 99.00th=[223347], 99.50th=[223347], 99.90th=[223347], 99.95th=[223347], | 99.99th=[223347] bw ( KiB/s): min= 2027, max= 6083, per=100.00%, avg=4055.00, stdev=2868.03, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 write: IOPS=1, BW=1256KiB/s (1287kB/s)(7168KiB/5705msec); 0 zone resets clat (msec): min=233, max=2099, avg=747.31, stdev=666.74 lat (msec): min=233, max=2099, avg=747.43, stdev=666.73 clat percentiles (msec): | 1.00th=[ 234], 5.00th=[ 234], 10.00th=[ 234], 20.00th=[ 249], | 30.00th=[ 351], 40.00th=[ 351], 50.00th=[ 575], 60.00th=[ 625], | 70.00th=[ 625], 80.00th=[ 1099], 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= 1976, max= 2043, per=40.22%, avg=2018.00, stdev=26.37, samples=6 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=6 lat (usec) : 750=16.67% lat (msec) : 100=8.33%, 250=33.33%, 500=8.33%, 750=16.67%, 2000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=6.17%, ctx=159, 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=3585KiB/s (3671kB/s), 358KiB/s-1569KiB/s (367kB/s-1607kB/s), io=20.0MiB (20.0MB), run=4568-5713msec WRITE: bw=5019KiB/s (5139kB/s), 1121KiB/s-1792KiB/s (1148kB/s-1835kB/s), io=28.0MiB (29.4MB), run=4568-5713msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144276: Wed Aug 26 10:02:40 2026 read: IOPS=1, BW=1484KiB/s (1520kB/s)(7168KiB/4829msec) clat (msec): min=110, max=447, avg=279.06, stdev=145.35 lat (msec): min=110, max=447, avg=279.06, stdev=145.35 clat percentiles (msec): | 1.00th=[ 111], 5.00th=[ 111], 10.00th=[ 111], 20.00th=[ 133], | 30.00th=[ 171], 40.00th=[ 171], 50.00th=[ 266], 60.00th=[ 401], | 70.00th=[ 401], 80.00th=[ 426], 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= 2000, max= 4382, per=83.76%, avg=2615.00, stdev=1178.15, samples=4 iops : min= 1, max= 4, avg= 1.75, stdev= 1.50, samples=4 write: IOPS=1, BW=1060KiB/s (1086kB/s)(5120KiB/4829msec); 0 zone resets clat (msec): min=243, max=1107, avg=558.08, stdev=360.08 lat (msec): min=243, max=1107, avg=558.17, stdev=360.08 clat percentiles (msec): | 1.00th=[ 243], 5.00th=[ 243], 10.00th=[ 243], 20.00th=[ 243], | 30.00th=[ 326], 40.00th=[ 326], 50.00th=[ 384], 60.00th=[ 384], | 70.00th=[ 735], 80.00th=[ 735], 90.00th=[ 1116], 95.00th=[ 1116], | 99.00th=[ 1116], 99.50th=[ 1116], 99.90th=[ 1116], 99.95th=[ 1116], | 99.99th=[ 1116] bw ( KiB/s): min= 2000, max= 2048, per=46.28%, avg=2023.40, stdev=17.21, samples=5 iops : min= 1, max= 2, avg= 1.20, stdev= 0.45, samples=5 lat (msec) : 250=33.33%, 500=50.00%, 750=8.33%, 2000=8.33% cpu : usr=0.00%, sys=3.07%, ctx=83, 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=144277: Wed Aug 26 10:02:40 2026 read: IOPS=0, BW=344KiB/s (353kB/s)(2048KiB/5946msec) clat (msec): min=140, max=636, avg=388.44, stdev=350.23 lat (msec): min=140, max=636, avg=388.44, stdev=350.23 clat percentiles (msec): | 1.00th=[ 142], 5.00th=[ 142], 10.00th=[ 142], 20.00th=[ 142], | 30.00th=[ 142], 40.00th=[ 142], 50.00th=[ 142], 60.00th=[ 634], | 70.00th=[ 634], 80.00th=[ 634], 90.00th=[ 634], 95.00th=[ 634], | 99.00th=[ 634], 99.50th=[ 634], 99.90th=[ 634], 99.95th=[ 634], | 99.99th=[ 634] bw ( KiB/s): min= 1448, max= 2023, per=55.59%, avg=1735.50, stdev=406.59, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1722KiB/s (1763kB/s)(10.0MiB/5946msec); 0 zone resets clat (msec): min=238, max=938, avg=507.36, stdev=235.53 lat (msec): min=238, max=938, avg=507.55, stdev=235.63 clat percentiles (msec): | 1.00th=[ 239], 5.00th=[ 239], 10.00th=[ 239], 20.00th=[ 275], | 30.00th=[ 334], 40.00th=[ 443], 50.00th=[ 443], 60.00th=[ 443], | 70.00th=[ 451], 80.00th=[ 667], 90.00th=[ 844], 95.00th=[ 936], | 99.00th=[ 936], 99.50th=[ 936], 99.90th=[ 936], 99.95th=[ 936], | 99.99th=[ 936] bw ( KiB/s): min= 1448, max= 4096, per=57.62%, avg=2519.00, stdev=1080.41, samples=7 iops : min= 1, max= 4, avg= 1.71, stdev= 1.25, samples=7 lat (msec) : 250=16.67%, 500=50.00%, 750=16.67%, 1000=16.67% cpu : usr=0.07%, sys=3.97%, ctx=67, 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=144278: Wed Aug 26 10:02:40 2026 read: IOPS=0, BW=937KiB/s (959kB/s)(6144KiB/6558msec) clat (msec): min=108, max=1375, avg=631.16, stdev=593.04 lat (msec): min=108, max=1375, avg=631.16, stdev=593.04 clat percentiles (msec): | 1.00th=[ 109], 5.00th=[ 109], 10.00th=[ 109], 20.00th=[ 140], | 30.00th=[ 140], 40.00th=[ 239], 50.00th=[ 239], 60.00th=[ 567], | 70.00th=[ 1368], 80.00th=[ 1368], 90.00th=[ 1385], 95.00th=[ 1385], | 99.00th=[ 1385], 99.50th=[ 1385], 99.90th=[ 1385], 99.95th=[ 1385], | 99.99th=[ 1385] bw ( KiB/s): min= 1996, max= 4055, per=80.82%, avg=2523.25, stdev=1021.24, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 write: IOPS=0, BW=937KiB/s (959kB/s)(6144KiB/6558msec); 0 zone resets clat (msec): min=241, max=1070, avg=453.80, stdev=309.64 lat (msec): min=242, max=1071, avg=454.31, stdev=310.00 clat percentiles (msec): | 1.00th=[ 243], 5.00th=[ 243], 10.00th=[ 243], 20.00th=[ 300], | 30.00th=[ 300], 40.00th=[ 309], 50.00th=[ 309], 60.00th=[ 359], | 70.00th=[ 447], 80.00th=[ 447], 90.00th=[ 1070], 95.00th=[ 1070], | 99.00th=[ 1070], 99.50th=[ 1070], 99.90th=[ 1070], 99.95th=[ 1070], | 99.99th=[ 1070] bw ( KiB/s): min= 2019, max= 2778, per=49.84%, avg=2178.80, stdev=335.12, samples=5 iops : min= 1, max= 2, avg= 1.20, stdev= 0.45, samples=5 lat (msec) : 250=33.33%, 500=33.33%, 750=8.33%, 2000=25.00% cpu : usr=0.03%, sys=2.12%, ctx=71, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=144279: Wed Aug 26 10:02:40 2026 read: IOPS=1, BW=1112KiB/s (1139kB/s)(5120KiB/4603msec) clat (msec): min=147, max=423, avg=228.82, stdev=116.02 lat (msec): min=147, max=423, avg=228.83, stdev=116.02 clat percentiles (msec): | 1.00th=[ 148], 5.00th=[ 148], 10.00th=[ 148], 20.00th=[ 148], | 30.00th=[ 159], 40.00th=[ 159], 50.00th=[ 167], 60.00th=[ 167], | 70.00th=[ 251], 80.00th=[ 251], 90.00th=[ 422], 95.00th=[ 422], | 99.00th=[ 422], 99.50th=[ 422], 99.90th=[ 422], 99.95th=[ 422], | 99.99th=[ 422] bw ( KiB/s): min= 2023, max= 4039, per=86.37%, avg=2696.33, stdev=1162.79, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 write: IOPS=1, BW=1557KiB/s (1595kB/s)(7168KiB/4603msec); 0 zone resets clat (msec): min=207, max=777, avg=482.99, stdev=180.32 lat (msec): min=207, max=777, avg=483.59, stdev=180.43 clat percentiles (msec): | 1.00th=[ 209], 5.00th=[ 209], 10.00th=[ 209], 20.00th=[ 334], | 30.00th=[ 460], 40.00th=[ 460], 50.00th=[ 506], 60.00th=[ 523], | 70.00th=[ 523], 80.00th=[ 575], 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= 2000, max= 2976, per=50.60%, avg=2212.20, stdev=427.18, samples=5 iops : min= 1, max= 2, avg= 1.20, stdev= 0.45, samples=5 lat (msec) : 250=33.33%, 500=33.33%, 750=25.00%, 1000=8.33% cpu : usr=0.00%, sys=3.39%, ctx=85, 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=3123KiB/s (3198kB/s), 344KiB/s-1484KiB/s (353kB/s-1520kB/s), io=20.0MiB (20.0MB), run=4603-6558msec WRITE: bw=4372KiB/s (4477kB/s), 937KiB/s-1722KiB/s (959kB/s-1763kB/s), io=28.0MiB (29.4MB), run=4603-6558msec 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=144292: Wed Aug 26 10:02:57 2026 read: IOPS=0, BW=3448KiB/s (3531kB/s)(12.0MiB/3564msec) clat (msec): min=1098, max=1202, avg=1136.30, stdev=57.56 lat (msec): min=1098, max=1202, avg=1136.30, stdev=57.56 clat percentiles (msec): | 1.00th=[ 1099], 5.00th=[ 1099], 10.00th=[ 1099], 20.00th=[ 1099], | 30.00th=[ 1099], 40.00th=[ 1116], 50.00th=[ 1116], 60.00th=[ 1116], | 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= 8047, max= 8078, per=100.00%, avg=8062.50, stdev=21.92, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 2000=100.00% cpu : usr=0.08%, sys=10.89%, ctx=186, 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=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=144293: Wed Aug 26 10:02:57 2026 read: IOPS=0, BW=987KiB/s (1010kB/s)(4096KiB/4152msec) clat (nsec): min=1091.2M, max=1091.2M, avg=1091220447.00, stdev= 0.00 lat (nsec): min=1091.2M, max=1091.2M, avg=1091223467.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1099], 5.00th=[ 1099], 10.00th=[ 1099], 20.00th=[ 1099], | 30.00th=[ 1099], 40.00th=[ 1099], 50.00th=[ 1099], 60.00th=[ 1099], | 70.00th=[ 1099], 80.00th=[ 1099], 90.00th=[ 1099], 95.00th=[ 1099], | 99.00th=[ 1099], 99.50th=[ 1099], 99.90th=[ 1099], 99.95th=[ 1099], | 99.99th=[ 1099] bw ( KiB/s): min= 8047, max= 8047, per=100.00%, avg=8047.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=1973KiB/s (2020kB/s)(8192KiB/4152msec); 0 zone resets clat (msec): min=1064, max=1905, avg=1485.00, stdev=594.46 lat (msec): min=1070, max=1907, avg=1488.98, stdev=592.43 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=[ 1905], | 70.00th=[ 1905], 80.00th=[ 1905], 90.00th=[ 1905], 95.00th=[ 1905], | 99.00th=[ 1905], 99.50th=[ 1905], 99.90th=[ 1905], 99.95th=[ 1905], | 99.99th=[ 1905] bw ( KiB/s): min= 8078, max= 8078, per=100.00%, avg=8078.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 2000=100.00% cpu : usr=0.00%, sys=5.40%, ctx=126, 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=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=144294: Wed Aug 26 10:02:57 2026 write: IOPS=0, BW=2942KiB/s (3012kB/s)(12.0MiB/4177msec); 0 zone resets clat (msec): min=962, max=1660, avg=1346.63, stdev=354.31 lat (msec): min=963, max=1661, avg=1347.26, stdev=354.57 clat percentiles (msec): | 1.00th=[ 961], 5.00th=[ 961], 10.00th=[ 961], 20.00th=[ 961], | 30.00th=[ 961], 40.00th=[ 1418], 50.00th=[ 1418], 60.00th=[ 1418], | 70.00th=[ 1653], 80.00th=[ 1653], 90.00th=[ 1653], 95.00th=[ 1653], | 99.00th=[ 1653], 99.50th=[ 1653], 99.90th=[ 1653], 99.95th=[ 1653], | 99.99th=[ 1653] bw ( KiB/s): min= 8078, max= 8143, per=100.00%, avg=8110.50, stdev=45.96, 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=0.02%, sys=5.96%, ctx=99, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144295: Wed Aug 26 10:02:57 2026 write: IOPS=0, BW=3706KiB/s (3795kB/s)(12.0MiB/3316msec); 0 zone resets clat (msec): min=761, max=1491, avg=1076.83, stdev=374.79 lat (msec): min=764, max=1491, avg=1078.25, stdev=373.69 clat percentiles (msec): | 1.00th=[ 760], 5.00th=[ 760], 10.00th=[ 760], 20.00th=[ 760], | 30.00th=[ 760], 40.00th=[ 978], 50.00th=[ 978], 60.00th=[ 978], | 70.00th=[ 1485], 80.00th=[ 1485], 90.00th=[ 1485], 95.00th=[ 1485], | 99.00th=[ 1485], 99.50th=[ 1485], 99.90th=[ 1485], 99.95th=[ 1485], | 99.99th=[ 1485] bw ( KiB/s): min= 8047, max= 8143, per=100.00%, avg=8095.00, stdev=67.88, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 1000=66.67%, 2000=33.33% cpu : usr=0.00%, sys=3.14%, ctx=43, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=3946KiB/s (4041kB/s), 987KiB/s-3448KiB/s (1010kB/s-3531kB/s), io=16.0MiB (16.8MB), run=3564-4152msec WRITE: bw=7845KiB/s (8033kB/s), 1973KiB/s-3706KiB/s (2020kB/s-3795kB/s), io=32.0MiB (33.6MB), run=3316-4177msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144296: Wed Aug 26 10:02:58 2026 read: IOPS=0, BW=2980KiB/s (3051kB/s)(12.0MiB/4124msec) clat (msec): min=881, max=1581, avg=1340.51, stdev=397.63 lat (msec): min=881, max=1581, avg=1340.51, stdev=397.63 clat percentiles (msec): | 1.00th=[ 885], 5.00th=[ 885], 10.00th=[ 885], 20.00th=[ 885], | 30.00th=[ 885], 40.00th=[ 1552], 50.00th=[ 1552], 60.00th=[ 1552], | 70.00th=[ 1586], 80.00th=[ 1586], 90.00th=[ 1586], 95.00th=[ 1586], | 99.00th=[ 1586], 99.50th=[ 1586], 99.90th=[ 1586], 99.95th=[ 1586], | 99.99th=[ 1586] bw ( KiB/s): min= 8143, max= 8192, per=100.00%, avg=8167.50, stdev=34.65, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 1000=33.33%, 2000=66.67% cpu : usr=0.00%, sys=3.10%, ctx=51, 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=144297: Wed Aug 26 10:02:58 2026 read: IOPS=0, BW=877KiB/s (898kB/s)(4096KiB/4669msec) clat (nsec): min=1715.6M, max=1715.6M, avg=1715617505.00, stdev= 0.00 lat (nsec): min=1715.6M, max=1715.6M, avg=1715619958.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1720], 5.00th=[ 1720], 10.00th=[ 1720], 20.00th=[ 1720], | 30.00th=[ 1720], 40.00th=[ 1720], 50.00th=[ 1720], 60.00th=[ 1720], | 70.00th=[ 1720], 80.00th=[ 1720], 90.00th=[ 1720], 95.00th=[ 1720], | 99.00th=[ 1720], 99.50th=[ 1720], 99.90th=[ 1720], 99.95th=[ 1720], | 99.99th=[ 1720] 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=1755KiB/s (1797kB/s)(8192KiB/4669msec); 0 zone resets clat (msec): min=501, max=2255, avg=1378.18, stdev=1240.14 lat (msec): min=501, max=2257, avg=1379.86, stdev=1241.86 clat percentiles (msec): | 1.00th=[ 502], 5.00th=[ 502], 10.00th=[ 502], 20.00th=[ 502], | 30.00th=[ 502], 40.00th=[ 502], 50.00th=[ 502], 60.00th=[ 2265], | 70.00th=[ 2265], 80.00th=[ 2265], 90.00th=[ 2265], 95.00th=[ 2265], | 99.00th=[ 2265], 99.50th=[ 2265], 99.90th=[ 2265], 99.95th=[ 2265], | 99.99th=[ 2265] bw ( KiB/s): min= 8110, max= 8110, per=100.00%, avg=8110.00, 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=1.97%, ctx=37, 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=144298: Wed Aug 26 10:02:58 2026 write: IOPS=0, BW=2583KiB/s (2645kB/s)(12.0MiB/4758msec); 0 zone resets clat (msec): min=445, max=2089, avg=1481.26, stdev=901.21 lat (msec): min=446, max=2090, avg=1483.08, stdev=902.21 clat percentiles (msec): | 1.00th=[ 447], 5.00th=[ 447], 10.00th=[ 447], 20.00th=[ 447], | 30.00th=[ 447], 40.00th=[ 1905], 50.00th=[ 1905], 60.00th=[ 1905], | 70.00th=[ 2089], 80.00th=[ 2089], 90.00th=[ 2089], 95.00th=[ 2089], | 99.00th=[ 2089], 99.50th=[ 2089], 99.90th=[ 2089], 99.95th=[ 2089], | 99.99th=[ 2089] bw ( KiB/s): min= 7876, max= 8110, per=100.00%, avg=7993.00, stdev=165.46, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=2.00%, ctx=34, 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=144299: Wed Aug 26 10:02:58 2026 write: IOPS=0, BW=3506KiB/s (3590kB/s)(12.0MiB/3505msec); 0 zone resets clat (msec): min=440, max=1558, avg=1139.59, stdev=609.01 lat (msec): min=441, max=1559, avg=1140.31, stdev=608.87 clat percentiles (msec): | 1.00th=[ 443], 5.00th=[ 443], 10.00th=[ 443], 20.00th=[ 443], | 30.00th=[ 443], 40.00th=[ 1418], 50.00th=[ 1418], 60.00th=[ 1418], | 70.00th=[ 1552], 80.00th=[ 1552], 90.00th=[ 1552], 95.00th=[ 1552], | 99.00th=[ 1552], 99.50th=[ 1552], 99.90th=[ 1552], 99.95th=[ 1552], | 99.99th=[ 1552] bw ( KiB/s): min= 8110, max= 8175, per=100.00%, avg=8142.50, stdev=45.96, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 2000=66.67% cpu : usr=0.00%, sys=3.57%, ctx=67, 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=3509KiB/s (3593kB/s), 877KiB/s-2980KiB/s (898kB/s-3051kB/s), io=16.0MiB (16.8MB), run=4124-4669msec WRITE: bw=6887KiB/s (7052kB/s), 1755KiB/s-3506KiB/s (1797kB/s-3590kB/s), io=32.0MiB (33.6MB), run=3505-4758msec