== sanity test 398b: DIO and buffer IO race ============== 11:43:38 (1787499818) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 9.71785 s, 5.2 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=145489: Sun Aug 23 11:47:16 2026 read: IOPS=7, BW=30.9KiB/s (31.7kB/s)(5992KiB/193850msec) clat (usec): min=33, max=504117, avg=46897.45, stdev=35617.54 lat (usec): min=33, max=504120, avg=46905.60, stdev=35622.32 clat percentiles (usec): | 1.00th=[ 58], 5.00th=[ 74], 10.00th=[ 9372], 20.00th=[ 22414], | 30.00th=[ 28181], 40.00th=[ 33424], 50.00th=[ 40109], 60.00th=[ 47973], | 70.00th=[ 57410], 80.00th=[ 70779], 90.00th=[ 88605], 95.00th=[105382], | 99.00th=[156238], 99.50th=[183501], 99.90th=[387974], 99.95th=[505414], | 99.99th=[505414] bw ( KiB/s): min= 7, max= 103, per=34.84%, avg=42.85, stdev=18.81, samples=272 iops : min= 1, max= 25, avg=10.06, stdev= 4.73, samples=272 write: IOPS=8, BW=32.5KiB/s (33.3kB/s)(6296KiB/193850msec); 0 zone resets clat (usec): min=1015, max=54172k, avg=78019.12, stdev=1365113.78 lat (usec): min=1015, max=54172k, avg=78021.63, stdev=1365113.75 clat percentiles (usec): | 1.00th=[ 1188], 5.00th=[ 1385], 10.00th=[ 2114], | 20.00th=[ 4817], 30.00th=[ 8717], 40.00th=[ 20579], | 50.00th=[ 32113], 60.00th=[ 44303], 70.00th=[ 57934], | 80.00th=[ 74974], 90.00th=[ 101188], 95.00th=[ 126354], | 99.00th=[ 191890], 99.50th=[ 229639], 99.90th=[ 658506], | 99.95th=[17112761], 99.99th=[17112761] bw ( KiB/s): min= 7, max= 135, per=34.70%, avg=44.77, stdev=20.89, samples=273 iops : min= 1, max= 33, avg=10.55, stdev= 5.25, samples=273 lat (usec) : 50=0.13%, 100=3.58%, 250=0.62%, 500=0.16%, 1000=0.03% lat (msec) : 2=4.95%, 4=4.13%, 10=7.49%, 20=7.26%, 50=34.80% lat (msec) : 100=28.78%, 250=7.85%, 500=0.13%, 750=0.07%, >=2000=0.03% cpu : usr=0.06%, sys=3.56%, ctx=6779, majf=0, minf=17 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1498,1574,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145490: Sun Aug 23 11:47:16 2026 read: IOPS=7, BW=30.6KiB/s (31.3kB/s)(5940KiB/194261msec) clat (usec): min=26, max=310996, avg=45415.07, stdev=34848.68 lat (usec): min=26, max=310998, avg=45422.45, stdev=34845.90 clat percentiles (usec): | 1.00th=[ 50], 5.00th=[ 71], 10.00th=[ 151], 20.00th=[ 20317], | 30.00th=[ 26084], 40.00th=[ 31589], 50.00th=[ 39060], 60.00th=[ 46400], | 70.00th=[ 56886], 80.00th=[ 67634], 90.00th=[ 89654], 95.00th=[110625], | 99.00th=[145753], 99.50th=[198181], 99.90th=[287310], 99.95th=[312476], | 99.99th=[312476] bw ( KiB/s): min= 5, max= 103, per=34.15%, avg=42.00, stdev=18.54, samples=275 iops : min= 1, max= 25, avg= 9.85, stdev= 4.67, samples=275 write: IOPS=8, BW=32.7KiB/s (33.5kB/s)(6348KiB/194261msec); 0 zone resets clat (usec): min=1053, max=54263k, avg=79490.92, stdev=1361828.93 lat (usec): min=1054, max=54263k, avg=79494.29, stdev=1361828.90 clat percentiles (usec): | 1.00th=[ 1221], 5.00th=[ 1434], 10.00th=[ 2114], | 20.00th=[ 4948], 30.00th=[ 9634], 40.00th=[ 21627], | 50.00th=[ 33817], 60.00th=[ 45876], 70.00th=[ 58459], | 80.00th=[ 76022], 90.00th=[ 105382], 95.00th=[ 135267], | 99.00th=[ 214959], 99.50th=[ 287310], 99.90th=[ 492831], | 99.95th=[17112761], 99.99th=[17112761] bw ( KiB/s): min= 7, max= 166, per=34.70%, avg=44.76, stdev=20.96, samples=276 iops : min= 1, max= 41, avg=10.54, stdev= 5.28, samples=276 lat (usec) : 50=0.46%, 100=3.78%, 250=0.68%, 500=0.16%, 750=0.16% lat (msec) : 2=4.92%, 4=4.23%, 10=7.13%, 20=8.07%, 50=34.86% lat (msec) : 100=26.01%, 250=9.05%, 500=0.46%, >=2000=0.03% cpu : usr=0.07%, sys=3.50%, ctx=6648, 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=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=145492: Sun Aug 23 11:47:16 2026 read: IOPS=7, BW=31.2KiB/s (31.9kB/s)(6028KiB/193311msec) clat (usec): min=29, max=586328, avg=45855.21, stdev=37619.08 lat (usec): min=29, max=586329, avg=45858.67, stdev=37619.02 clat percentiles (usec): | 1.00th=[ 54], 5.00th=[ 72], 10.00th=[ 1647], 20.00th=[ 20579], | 30.00th=[ 27132], 40.00th=[ 32375], 50.00th=[ 38536], 60.00th=[ 46400], | 70.00th=[ 55837], 80.00th=[ 67634], 90.00th=[ 86508], 95.00th=[105382], | 99.00th=[166724], 99.50th=[206570], 99.90th=[304088], 99.95th=[583009], | 99.99th=[583009] bw ( KiB/s): min= 7, max= 111, per=35.08%, avg=43.15, stdev=19.06, samples=272 iops : min= 1, max= 27, avg=10.13, stdev= 4.80, samples=272 write: IOPS=8, BW=32.4KiB/s (33.2kB/s)(6260KiB/193311msec); 0 zone resets clat (usec): min=992, max=54310k, avg=78957.89, stdev=1372443.24 lat (usec): min=994, max=54310k, avg=78963.01, stdev=1372443.13 clat percentiles (usec): | 1.00th=[ 1205], 5.00th=[ 1385], 10.00th=[ 2114], | 20.00th=[ 4621], 30.00th=[ 9634], 40.00th=[ 21103], | 50.00th=[ 34866], 60.00th=[ 46924], 70.00th=[ 60556], | 80.00th=[ 76022], 90.00th=[ 103285], 95.00th=[ 125305], | 99.00th=[ 191890], 99.50th=[ 208667], 99.90th=[ 492831], | 99.95th=[17112761], 99.99th=[17112761] bw ( KiB/s): min= 7, max= 112, per=34.44%, avg=44.43, stdev=19.60, samples=274 iops : min= 1, max= 28, avg=10.45, stdev= 4.94, samples=274 lat (usec) : 50=0.42%, 100=3.55%, 250=0.59%, 500=0.16%, 750=0.03% lat (usec) : 1000=0.13% lat (msec) : 2=4.98%, 4=4.26%, 10=6.87%, 20=8.24%, 50=34.28% lat (msec) : 100=28.06%, 250=8.11%, 500=0.26%, 750=0.03%, >=2000=0.03% cpu : usr=0.06%, sys=3.53%, ctx=6584, 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=145494: Sun Aug 23 11:47:16 2026 read: IOPS=7, BW=31.1KiB/s (31.9kB/s)(6052KiB/194558msec) clat (usec): min=34, max=273025, avg=45153.46, stdev=32927.78 lat (usec): min=34, max=273026, avg=45155.06, stdev=32927.62 clat percentiles (usec): | 1.00th=[ 51], 5.00th=[ 69], 10.00th=[ 429], 20.00th=[ 20841], | 30.00th=[ 26608], 40.00th=[ 32637], 50.00th=[ 39060], 60.00th=[ 45876], | 70.00th=[ 56361], 80.00th=[ 69731], 90.00th=[ 87557], 95.00th=[105382], | 99.00th=[145753], 99.50th=[166724], 99.90th=[248513], 99.95th=[274727], | 99.99th=[274727] bw ( KiB/s): min= 7, max= 118, per=35.26%, avg=43.37, stdev=17.82, samples=270 iops : min= 1, max= 29, avg=10.18, stdev= 4.48, samples=270 write: IOPS=8, BW=32.1KiB/s (32.8kB/s)(6236KiB/194558msec); 0 zone resets clat (usec): min=1062, max=54218k, avg=80549.78, stdev=1372878.02 lat (usec): min=1064, max=54218k, avg=80552.53, stdev=1372878.01 clat percentiles (usec): | 1.00th=[ 1237], 5.00th=[ 1434], 10.00th=[ 2507], | 20.00th=[ 5538], 30.00th=[ 11731], 40.00th=[ 22414], | 50.00th=[ 33817], 60.00th=[ 44827], 70.00th=[ 60031], | 80.00th=[ 77071], 90.00th=[ 106431], 95.00th=[ 135267], | 99.00th=[ 196084], 99.50th=[ 252707], 99.90th=[ 650118], | 99.95th=[17112761], 99.99th=[17112761] bw ( KiB/s): min= 7, max= 87, per=34.03%, avg=43.89, stdev=18.10, samples=275 iops : min= 1, max= 21, avg=10.31, stdev= 4.54, samples=275 lat (usec) : 50=0.46%, 100=3.68%, 250=0.65%, 500=0.23%, 750=0.13% lat (usec) : 1000=0.07% lat (msec) : 2=4.17%, 4=3.81%, 10=6.32%, 20=8.92%, 50=35.71% lat (msec) : 100=27.05%, 250=8.53%, 500=0.23%, 750=0.03%, >=2000=0.03% cpu : usr=0.06%, sys=3.37%, ctx=6628, 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=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=123KiB/s (126kB/s), 30.6KiB/s-31.2KiB/s (31.3kB/s-31.9kB/s), io=23.4MiB (24.6MB), run=193311-194558msec WRITE: bw=129KiB/s (132kB/s), 32.1KiB/s-32.7KiB/s (32.8kB/s-33.5kB/s), io=24.6MiB (25.7MB), run=193311-194558msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145491: Sun Aug 23 11:49:30 2026 read: IOPS=4, BW=18.5KiB/s (18.9kB/s)(5992KiB/324088msec) clat (msec): min=6, max=546, avg=35.72, stdev=38.09 lat (msec): min=6, max=546, avg=35.72, stdev=38.08 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 17], 40.00th=[ 20], 50.00th=[ 23], 60.00th=[ 28], | 70.00th=[ 34], 80.00th=[ 47], 90.00th=[ 77], 95.00th=[ 107], | 99.00th=[ 180], 99.50th=[ 234], 99.90th=[ 397], 99.95th=[ 550], | 99.99th=[ 550] bw ( KiB/s): min= 7, max= 87, per=34.71%, avg=25.33, stdev=17.21, samples=457 iops : min= 1, max= 21, avg= 5.69, stdev= 4.34, samples=457 write: IOPS=4, BW=19.4KiB/s (19.9kB/s)(6296KiB/324088msec); 0 zone resets clat (msec): min=40, max=54295, avg=171.53, stdev=1366.83 lat (msec): min=40, max=54295, avg=171.54, stdev=1366.83 clat percentiles (msec): | 1.00th=[ 51], 5.00th=[ 63], 10.00th=[ 72], 20.00th=[ 85], | 30.00th=[ 94], 40.00th=[ 105], 50.00th=[ 118], 60.00th=[ 136], | 70.00th=[ 155], 80.00th=[ 186], 90.00th=[ 228], 95.00th=[ 271], | 99.00th=[ 380], 99.50th=[ 456], 99.90th=[ 667], 99.95th=[17113], | 99.99th=[17113] bw ( KiB/s): min= 7, max= 55, per=30.31%, avg=23.04, stdev=11.04, samples=526 iops : min= 1, max= 13, avg= 5.11, stdev= 2.81, samples=526 lat (msec) : 10=2.38%, 20=18.33%, 50=19.47%, 100=24.22%, 250=32.00% lat (msec) : 500=3.52%, 750=0.07%, >=2000=0.03% cpu : usr=0.05%, sys=0.95%, ctx=5158, 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=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=145493: Sun Aug 23 11:49:30 2026 read: IOPS=4, BW=18.1KiB/s (18.5kB/s)(5940KiB/328405msec) clat (msec): min=6, max=753, avg=37.73, stdev=45.01 lat (msec): min=6, max=753, avg=37.74, stdev=45.01 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 20], 50.00th=[ 23], 60.00th=[ 27], | 70.00th=[ 34], 80.00th=[ 48], 90.00th=[ 89], 95.00th=[ 122], | 99.00th=[ 213], 99.50th=[ 247], 99.90th=[ 422], 99.95th=[ 751], | 99.99th=[ 751] bw ( KiB/s): min= 7, max= 86, per=33.85%, avg=24.71, stdev=16.28, samples=463 iops : min= 1, max= 21, avg= 5.53, stdev= 4.10, samples=463 write: IOPS=4, BW=19.3KiB/s (19.8kB/s)(6348KiB/328405msec); 0 zone resets clat (msec): min=37, max=54445, avg=171.28, stdev=1365.02 lat (msec): min=37, max=54445, avg=171.28, stdev=1365.02 clat percentiles (msec): | 1.00th=[ 52], 5.00th=[ 63], 10.00th=[ 72], 20.00th=[ 84], | 30.00th=[ 96], 40.00th=[ 107], 50.00th=[ 120], 60.00th=[ 133], | 70.00th=[ 155], 80.00th=[ 180], 90.00th=[ 230], 95.00th=[ 275], | 99.00th=[ 372], 99.50th=[ 456], 99.90th=[ 676], 99.95th=[17113], | 99.99th=[17113] bw ( KiB/s): min= 7, max= 63, per=30.03%, avg=22.82, stdev=11.15, samples=534 iops : min= 1, max= 15, avg= 5.06, stdev= 2.84, samples=534 lat (msec) : 10=2.86%, 20=17.74%, 50=18.88%, 100=22.62%, 250=33.85% lat (msec) : 500=3.84%, 750=0.13%, 1000=0.03%, >=2000=0.03% cpu : usr=0.04%, sys=0.97%, ctx=5206, 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=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=145495: Sun Aug 23 11:49:30 2026 read: IOPS=4, BW=18.4KiB/s (18.9kB/s)(6028KiB/327392msec) clat (msec): min=5, max=54293, avg=74.12, stdev=1398.27 lat (msec): min=5, max=54293, avg=74.13, stdev=1398.27 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 17], 40.00th=[ 20], 50.00th=[ 23], 60.00th=[ 28], | 70.00th=[ 35], 80.00th=[ 52], 90.00th=[ 87], 95.00th=[ 124], | 99.00th=[ 201], 99.50th=[ 264], 99.90th=[ 485], 99.95th=[17113], | 99.99th=[17113] bw ( KiB/s): min= 7, max= 107, per=32.98%, avg=24.08, stdev=17.09, samples=482 iops : min= 1, max= 26, avg= 5.38, stdev= 4.30, samples=482 write: IOPS=4, BW=19.1KiB/s (19.6kB/s)(6260KiB/327392msec); 0 zone resets clat (msec): min=35, max=845, avg=137.48, stdev=68.12 lat (msec): min=35, max=845, avg=137.49, stdev=68.12 clat percentiles (msec): | 1.00th=[ 51], 5.00th=[ 63], 10.00th=[ 71], 20.00th=[ 85], | 30.00th=[ 96], 40.00th=[ 108], 50.00th=[ 121], 60.00th=[ 136], | 70.00th=[ 157], 80.00th=[ 182], 90.00th=[ 228], 95.00th=[ 271], | 99.00th=[ 351], 99.50th=[ 422], 99.90th=[ 493], 99.95th=[ 844], | 99.99th=[ 844] bw ( KiB/s): min= 7, max= 63, per=30.19%, avg=22.94, stdev=10.79, samples=524 iops : min= 1, max= 15, avg= 5.09, stdev= 2.74, samples=524 lat (msec) : 10=2.86%, 20=18.65%, 50=17.77%, 100=23.11%, 250=33.76% lat (msec) : 500=3.78%, 1000=0.03%, >=2000=0.03% cpu : usr=0.05%, sys=0.95%, ctx=5223, 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=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=145496: Sun Aug 23 11:49:30 2026 read: IOPS=4, BW=18.8KiB/s (19.3kB/s)(6052KiB/321788msec) clat (msec): min=6, max=422, avg=35.34, stdev=37.74 lat (msec): min=6, max=422, avg=35.34, stdev=37.75 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 19], 50.00th=[ 22], 60.00th=[ 26], | 70.00th=[ 33], 80.00th=[ 47], 90.00th=[ 81], 95.00th=[ 108], | 99.00th=[ 201], 99.50th=[ 224], 99.90th=[ 317], 99.95th=[ 422], | 99.99th=[ 422] bw ( KiB/s): min= 7, max= 104, per=34.97%, avg=25.53, stdev=18.10, samples=458 iops : min= 1, max= 26, avg= 5.74, stdev= 4.56, samples=458 write: IOPS=4, BW=19.4KiB/s (19.8kB/s)(6236KiB/321788msec); 0 zone resets clat (msec): min=33, max=54485, avg=171.75, stdev=1378.40 lat (msec): min=33, max=54485, avg=171.75, stdev=1378.40 clat percentiles (msec): | 1.00th=[ 51], 5.00th=[ 63], 10.00th=[ 70], 20.00th=[ 82], | 30.00th=[ 93], 40.00th=[ 105], 50.00th=[ 116], 60.00th=[ 133], | 70.00th=[ 155], 80.00th=[ 184], 90.00th=[ 232], 95.00th=[ 275], | 99.00th=[ 397], 99.50th=[ 468], 99.90th=[ 827], 99.95th=[17113], | 99.99th=[17113] bw ( KiB/s): min= 7, max= 71, per=30.20%, avg=22.95, stdev=11.04, samples=522 iops : min= 1, max= 17, avg= 5.08, stdev= 2.82, samples=522 lat (msec) : 10=3.09%, 20=18.75%, 50=18.75%, 100=24.22%, 250=31.28% lat (msec) : 500=3.78%, 750=0.07%, 1000=0.03%, >=2000=0.03% cpu : usr=0.04%, sys=0.96%, ctx=5204, 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=73.1KiB/s (74.9kB/s), 18.1KiB/s-18.8KiB/s (18.5kB/s-19.3kB/s), io=23.4MiB (24.6MB), run=321788-328405msec WRITE: bw=76.6KiB/s (78.4kB/s), 19.1KiB/s-19.4KiB/s (19.6kB/s-19.9kB/s), io=24.6MiB (25.7MB), run=321788-328405msec 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=145565: Sun Aug 23 11:50:17 2026 read: IOPS=11, BW=177KiB/s (181kB/s)(5920KiB/33445msec) clat (usec): min=37, max=220896, avg=43775.42, stdev=36802.59 lat (usec): min=37, max=220897, avg=43777.17, stdev=36802.22 clat percentiles (usec): | 1.00th=[ 42], 5.00th=[ 65], 10.00th=[ 76], 20.00th=[ 109], | 30.00th=[ 23725], 40.00th=[ 32900], 50.00th=[ 41157], 60.00th=[ 49021], | 70.00th=[ 58983], 80.00th=[ 68682], 90.00th=[ 88605], 95.00th=[104334], | 99.00th=[175113], 99.50th=[198181], 99.90th=[221250], 99.95th=[221250], | 99.99th=[221250] bw ( KiB/s): min= 30, max= 478, per=25.65%, avg=175.94, stdev=77.21, samples=65 iops : min= 1, max= 29, avg=10.22, stdev= 4.85, samples=65 write: IOPS=11, BW=190KiB/s (195kB/s)(6368KiB/33445msec); 0 zone resets clat (usec): min=1525, max=272962, avg=43140.86, stdev=45314.53 lat (usec): min=1526, max=272964, avg=43154.57, stdev=45328.14 clat percentiles (usec): | 1.00th=[ 1811], 5.00th=[ 2737], 10.00th=[ 3851], 20.00th=[ 6915], | 30.00th=[ 10159], 40.00th=[ 18220], 50.00th=[ 28181], 60.00th=[ 40109], | 70.00th=[ 55313], 80.00th=[ 72877], 90.00th=[103285], 95.00th=[130548], | 99.00th=[223347], 99.50th=[248513], 99.90th=[274727], 99.95th=[274727], | 99.99th=[274727] bw ( KiB/s): min= 92, max= 414, per=26.37%, avg=190.42, stdev=76.31, samples=65 iops : min= 5, max= 25, avg=11.14, stdev= 4.79, samples=65 lat (usec) : 50=1.30%, 100=7.94%, 250=1.56%, 500=0.39%, 1000=0.13% lat (msec) : 2=1.43%, 4=4.43%, 10=10.03%, 20=7.29%, 50=29.95% lat (msec) : 100=26.56%, 250=8.85%, 500=0.13% cpu : usr=0.08%, sys=5.54%, ctx=1605, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145566: Sun Aug 23 11:50:17 2026 read: IOPS=10, BW=172KiB/s (176kB/s)(5744KiB/33398msec) clat (usec): min=39, max=214318, avg=47995.64, stdev=34625.74 lat (usec): min=39, max=214318, avg=48002.89, stdev=34622.44 clat percentiles (usec): | 1.00th=[ 44], 5.00th=[ 72], 10.00th=[ 85], 20.00th=[ 18482], | 30.00th=[ 31589], 40.00th=[ 38536], 50.00th=[ 45351], 60.00th=[ 55837], | 70.00th=[ 61080], 80.00th=[ 77071], 90.00th=[ 92799], 95.00th=[106431], | 99.00th=[141558], 99.50th=[168821], 99.90th=[214959], 99.95th=[214959], | 99.99th=[214959] bw ( KiB/s): min= 22, max= 349, per=25.06%, avg=171.94, stdev=69.03, samples=65 iops : min= 1, max= 21, avg= 9.97, stdev= 4.37, samples=65 write: IOPS=12, BW=196KiB/s (201kB/s)(6544KiB/33398msec); 0 zone resets clat (usec): min=1442, max=269995, avg=39405.83, stdev=44446.00 lat (usec): min=1444, max=269997, avg=39408.51, stdev=44446.00 clat percentiles (usec): | 1.00th=[ 1713], 5.00th=[ 2245], 10.00th=[ 3326], 20.00th=[ 6718], | 30.00th=[ 9765], 40.00th=[ 13960], 50.00th=[ 21890], 60.00th=[ 34341], | 70.00th=[ 49546], 80.00th=[ 66323], 90.00th=[ 95945], 95.00th=[124257], | 99.00th=[208667], 99.50th=[265290], 99.90th=[270533], 99.95th=[270533], | 99.99th=[270533] bw ( KiB/s): min= 63, max= 477, per=27.06%, avg=195.35, stdev=96.50, samples=65 iops : min= 3, max= 29, avg=11.45, stdev= 6.10, samples=65 lat (usec) : 50=0.52%, 100=5.99%, 250=1.30%, 500=0.13%, 1000=0.13% lat (msec) : 2=1.95%, 4=4.82%, 10=10.42%, 20=9.24%, 50=28.13% lat (msec) : 100=29.82%, 250=7.16%, 500=0.39% cpu : usr=0.09%, sys=5.16%, ctx=1597, 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=145567: Sun Aug 23 11:50:17 2026 read: IOPS=11, BW=179KiB/s (184kB/s)(6256KiB/34869msec) clat (usec): min=40, max=349249, avg=49052.51, stdev=43704.97 lat (usec): min=41, max=349251, avg=49061.84, stdev=43711.74 clat percentiles (usec): | 1.00th=[ 44], 5.00th=[ 70], 10.00th=[ 82], 20.00th=[ 603], | 30.00th=[ 28181], 40.00th=[ 35914], 50.00th=[ 43254], 60.00th=[ 52691], | 70.00th=[ 63177], 80.00th=[ 78119], 90.00th=[ 96994], 95.00th=[119014], | 99.00th=[200279], 99.50th=[341836], 99.90th=[350225], 99.95th=[350225], | 99.99th=[350225] bw ( KiB/s): min= 46, max= 540, per=26.25%, avg=180.10, stdev=87.33, samples=68 iops : min= 2, max= 33, avg=10.47, stdev= 5.47, samples=68 write: IOPS=10, BW=173KiB/s (177kB/s)(6032KiB/34869msec); 0 zone resets clat (usec): min=1491, max=297831, avg=41300.83, stdev=46255.19 lat (usec): min=1492, max=297833, avg=41310.92, stdev=46250.19 clat percentiles (usec): | 1.00th=[ 1663], 5.00th=[ 2507], 10.00th=[ 4359], 20.00th=[ 6980], | 30.00th=[ 10028], 40.00th=[ 15533], 50.00th=[ 25035], 60.00th=[ 38011], | 70.00th=[ 52167], 80.00th=[ 67634], 90.00th=[ 91751], 95.00th=[128451], | 99.00th=[225444], 99.50th=[263193], 99.90th=[299893], 99.95th=[299893], | 99.99th=[299893] bw ( KiB/s): min= 30, max= 379, per=24.06%, avg=173.73, stdev=76.91, samples=67 iops : min= 1, max= 23, avg=10.07, stdev= 4.82, samples=67 lat (usec) : 50=0.91%, 100=6.38%, 250=1.56%, 500=1.17%, 750=0.39% lat (usec) : 1000=0.39% lat (msec) : 2=1.17%, 4=3.52%, 10=10.29%, 20=8.46%, 50=28.78% lat (msec) : 100=27.73%, 250=8.59%, 500=0.65% cpu : usr=0.09%, sys=5.03%, ctx=1601, 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=145568: Sun Aug 23 11:50:17 2026 read: IOPS=11, BW=182KiB/s (187kB/s)(6032KiB/33088msec) clat (usec): min=40, max=207685, avg=46279.01, stdev=36440.56 lat (usec): min=40, max=207687, avg=46280.45, stdev=36440.60 clat percentiles (usec): | 1.00th=[ 46], 5.00th=[ 65], 10.00th=[ 79], 20.00th=[ 2114], | 30.00th=[ 27919], 40.00th=[ 36439], 50.00th=[ 44827], 60.00th=[ 52167], | 70.00th=[ 59507], 80.00th=[ 70779], 90.00th=[ 93848], 95.00th=[109577], | 99.00th=[162530], 99.50th=[204473], 99.90th=[208667], 99.95th=[208667], | 99.99th=[208667] bw ( KiB/s): min= 31, max= 350, per=26.40%, avg=181.13, stdev=69.90, samples=64 iops : min= 1, max= 21, avg=10.55, stdev= 4.39, samples=64 write: IOPS=11, BW=189KiB/s (194kB/s)(6256KiB/33088msec); 0 zone resets clat (usec): min=1582, max=347795, avg=39689.80, stdev=42119.31 lat (usec): min=1585, max=347799, avg=39719.80, stdev=42123.56 clat percentiles (usec): | 1.00th=[ 1647], 5.00th=[ 2474], 10.00th=[ 3785], 20.00th=[ 6652], | 30.00th=[ 9765], 40.00th=[ 14615], 50.00th=[ 26608], 60.00th=[ 38011], | 70.00th=[ 50070], 80.00th=[ 67634], 90.00th=[ 96994], 95.00th=[121111], | 99.00th=[173016], 99.50th=[204473], 99.90th=[346031], 99.95th=[346031], | 99.99th=[346031] bw ( KiB/s): min= 31, max= 437, per=26.05%, avg=188.05, stdev=87.23, samples=64 iops : min= 1, max= 27, avg=10.98, stdev= 5.50, samples=64 lat (usec) : 50=0.78%, 100=6.51%, 250=1.69%, 500=0.39%, 750=0.13% lat (msec) : 2=2.21%, 4=3.65%, 10=10.68%, 20=8.98%, 50=29.04% lat (msec) : 100=27.60%, 250=8.20%, 500=0.13% cpu : usr=0.09%, sys=5.21%, ctx=1591, 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=687KiB/s (703kB/s), 172KiB/s-182KiB/s (176kB/s-187kB/s), io=23.4MiB (24.5MB), run=33088-34869msec WRITE: bw=723KiB/s (740kB/s), 173KiB/s-196KiB/s (177kB/s-201kB/s), io=24.6MiB (25.8MB), run=33088-34869msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145560: Sun Aug 23 11:51:00 2026 read: IOPS=4, BW=75.3KiB/s (77.1kB/s)(5920KiB/78584msec) clat (msec): min=8, max=379, avg=49.21, stdev=45.85 lat (msec): min=8, max=379, avg=49.22, stdev=45.86 clat percentiles (msec): | 1.00th=[ 11], 5.00th=[ 14], 10.00th=[ 16], 20.00th=[ 22], | 30.00th=[ 27], 40.00th=[ 31], 50.00th=[ 36], 60.00th=[ 44], | 70.00th=[ 52], 80.00th=[ 64], 90.00th=[ 86], 95.00th=[ 124], | 99.00th=[ 257], 99.50th=[ 355], 99.90th=[ 380], 99.95th=[ 380], | 99.99th=[ 380] bw ( KiB/s): min= 30, max= 284, per=28.30%, avg=85.74, stdev=49.28, samples=135 iops : min= 1, max= 17, avg= 4.56, stdev= 3.16, samples=135 write: IOPS=5, BW=81.0KiB/s (82.0kB/s)(6368KiB/78584msec); 0 zone resets clat (msec): min=49, max=525, avg=151.18, stdev=68.50 lat (msec): min=49, max=525, avg=151.19, stdev=68.50 clat percentiles (msec): | 1.00th=[ 55], 5.00th=[ 72], 10.00th=[ 81], 20.00th=[ 95], | 30.00th=[ 111], 40.00th=[ 122], 50.00th=[ 133], 60.00th=[ 153], | 70.00th=[ 171], 80.00th=[ 203], 90.00th=[ 251], 95.00th=[ 288], | 99.00th=[ 359], 99.50th=[ 393], 99.90th=[ 527], 99.95th=[ 527], | 99.99th=[ 527] bw ( KiB/s): min= 30, max= 190, per=25.47%, avg=81.24, stdev=37.38, samples=154 iops : min= 1, max= 11, avg= 4.27, stdev= 2.37, samples=154 lat (msec) : 10=0.39%, 20=7.81%, 50=24.48%, 100=24.35%, 250=37.11% lat (msec) : 500=5.73%, 750=0.13% cpu : usr=0.04%, sys=1.21%, ctx=1343, 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=145561: Sun Aug 23 11:51:00 2026 read: IOPS=4, BW=72.8KiB/s (74.6kB/s)(5744KiB/78879msec) clat (msec): min=8, max=343, avg=46.67, stdev=40.44 lat (msec): min=8, max=343, avg=46.67, stdev=40.44 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 13], 10.00th=[ 16], 20.00th=[ 21], | 30.00th=[ 26], 40.00th=[ 29], 50.00th=[ 35], 60.00th=[ 40], | 70.00th=[ 49], 80.00th=[ 66], 90.00th=[ 92], 95.00th=[ 130], | 99.00th=[ 182], 99.50th=[ 321], 99.90th=[ 342], 99.95th=[ 342], | 99.99th=[ 342] bw ( KiB/s): min= 24, max= 286, per=29.95%, avg=90.74, stdev=54.77, samples=123 iops : min= 1, max= 17, avg= 4.87, stdev= 3.46, samples=123 write: IOPS=5, BW=82.0KiB/s (84.0kB/s)(6544KiB/78879msec); 0 zone resets clat (msec): min=46, max=600, avg=151.60, stdev=73.05 lat (msec): min=46, max=600, avg=151.61, stdev=73.05 clat percentiles (msec): | 1.00th=[ 55], 5.00th=[ 70], 10.00th=[ 82], 20.00th=[ 96], | 30.00th=[ 109], 40.00th=[ 121], 50.00th=[ 138], 60.00th=[ 153], | 70.00th=[ 171], 80.00th=[ 192], 90.00th=[ 239], 95.00th=[ 284], | 99.00th=[ 397], 99.50th=[ 460], 99.90th=[ 600], 99.95th=[ 600], | 99.99th=[ 600] bw ( KiB/s): min= 30, max= 190, per=26.20%, avg=83.58, stdev=37.60, samples=152 iops : min= 1, max= 11, avg= 4.42, stdev= 2.41, samples=152 lat (msec) : 10=0.65%, 20=7.68%, 50=24.74%, 100=22.40%, 250=39.45% lat (msec) : 500=4.95%, 750=0.13% cpu : usr=0.05%, sys=1.22%, ctx=1334, 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=145562: Sun Aug 23 11:51:00 2026 read: IOPS=5, BW=81.5KiB/s (83.4kB/s)(6256KiB/76785msec) clat (msec): min=8, max=372, avg=45.96, stdev=43.19 lat (msec): min=8, max=372, avg=45.97, stdev=43.19 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 13], 10.00th=[ 17], 20.00th=[ 21], | 30.00th=[ 24], 40.00th=[ 28], 50.00th=[ 33], 60.00th=[ 39], | 70.00th=[ 48], 80.00th=[ 58], 90.00th=[ 93], 95.00th=[ 131], | 99.00th=[ 279], 99.50th=[ 317], 99.90th=[ 372], 99.95th=[ 372], | 99.99th=[ 372] bw ( KiB/s): min= 30, max= 380, per=31.37%, avg=95.04, stdev=65.15, samples=130 iops : min= 1, max= 23, avg= 5.14, stdev= 4.11, samples=130 write: IOPS=4, BW=78.6KiB/s (80.4kB/s)(6032KiB/76785msec); 0 zone resets clat (msec): min=33, max=654, avg=155.39, stdev=76.60 lat (msec): min=33, max=654, avg=155.40, stdev=76.60 clat percentiles (msec): | 1.00th=[ 54], 5.00th=[ 68], 10.00th=[ 81], 20.00th=[ 95], | 30.00th=[ 106], 40.00th=[ 122], 50.00th=[ 136], 60.00th=[ 157], | 70.00th=[ 180], 80.00th=[ 209], 90.00th=[ 257], 95.00th=[ 309], | 99.00th=[ 388], 99.50th=[ 418], 99.90th=[ 659], 99.95th=[ 659], | 99.99th=[ 659] bw ( KiB/s): min= 24, max= 192, per=25.13%, avg=80.16, stdev=37.37, samples=147 iops : min= 1, max= 12, avg= 4.21, stdev= 2.40, samples=147 lat (msec) : 10=0.65%, 20=8.98%, 50=27.86%, 100=20.57%, 250=35.94% lat (msec) : 500=5.86%, 750=0.13% cpu : usr=0.04%, sys=1.31%, ctx=1384, 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=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=145563: Sun Aug 23 11:51:00 2026 read: IOPS=4, BW=77.0KiB/s (79.8kB/s)(6032KiB/77376msec) clat (msec): min=7, max=389, avg=48.95, stdev=45.69 lat (msec): min=7, max=389, avg=48.95, stdev=45.69 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 13], 10.00th=[ 16], 20.00th=[ 20], | 30.00th=[ 24], 40.00th=[ 30], 50.00th=[ 36], 60.00th=[ 45], | 70.00th=[ 51], 80.00th=[ 63], 90.00th=[ 101], 95.00th=[ 138], | 99.00th=[ 232], 99.50th=[ 279], 99.90th=[ 388], 99.95th=[ 388], | 99.99th=[ 388] bw ( KiB/s): min= 30, max= 320, per=29.45%, avg=89.23, stdev=54.95, samples=132 iops : min= 1, max= 20, avg= 4.77, stdev= 3.50, samples=132 write: IOPS=5, BW=80.9KiB/s (82.8kB/s)(6256KiB/77376msec); 0 zone resets clat (msec): min=42, max=540, avg=150.11, stdev=68.73 lat (msec): min=42, max=540, avg=150.14, stdev=68.80 clat percentiles (msec): | 1.00th=[ 56], 5.00th=[ 73], 10.00th=[ 84], 20.00th=[ 97], | 30.00th=[ 109], 40.00th=[ 125], 50.00th=[ 136], 60.00th=[ 148], | 70.00th=[ 165], 80.00th=[ 192], 90.00th=[ 236], 95.00th=[ 271], | 99.00th=[ 422], 99.50th=[ 481], 99.90th=[ 542], 99.95th=[ 542], | 99.99th=[ 542] bw ( KiB/s): min= 30, max= 191, per=25.78%, avg=82.25, stdev=36.49, samples=149 iops : min= 1, max= 11, avg= 4.34, stdev= 2.32, samples=149 lat (msec) : 10=0.78%, 20=9.64%, 50=23.70%, 100=21.74%, 250=39.45% lat (msec) : 500=4.56%, 750=0.13% cpu : usr=0.05%, sys=1.29%, ctx=1357, 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=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=304KiB/s (311kB/s), 72.8KiB/s-81.5KiB/s (74.6kB/s-83.4kB/s), io=23.4MiB (24.5MB), run=76785-78879msec WRITE: bw=319KiB/s (327kB/s), 78.6KiB/s-82.0KiB/s (80.4kB/s-84.0kB/s), io=24.6MiB (25.8MB), run=76785-78879msec 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=145594: Sun Aug 23 11:51:18 2026 read: IOPS=1, BW=1550KiB/s (1587kB/s)(7168KiB/4626msec) clat (usec): min=1945, max=508336, avg=311254.41, stdev=158112.88 lat (usec): min=1947, max=508338, avg=311256.19, stdev=158112.87 clat percentiles (usec): | 1.00th=[ 1942], 5.00th=[ 1942], 10.00th=[ 1942], 20.00th=[248513], | 30.00th=[312476], 40.00th=[312476], 50.00th=[346031], 60.00th=[362808], | 70.00th=[362808], 80.00th=[400557], 90.00th=[509608], 95.00th=[509608], | 99.00th=[509608], 99.50th=[509608], 99.90th=[509608], 99.95th=[509608], | 99.99th=[509608] bw ( KiB/s): min= 1575, max= 4079, per=64.44%, avg=2291.00, stdev=1012.18, samples=5 iops : min= 1, max= 3, avg= 1.40, stdev= 0.89, samples=5 write: IOPS=1, BW=1107KiB/s (1133kB/s)(5120KiB/4626msec); 0 zone resets clat (msec): min=281, max=645, avg=487.25, stdev=147.45 lat (msec): min=282, max=645, avg=487.74, stdev=147.24 clat percentiles (msec): | 1.00th=[ 284], 5.00th=[ 284], 10.00th=[ 284], 20.00th=[ 284], | 30.00th=[ 426], 40.00th=[ 426], 50.00th=[ 472], 60.00th=[ 472], | 70.00th=[ 609], 80.00th=[ 609], 90.00th=[ 642], 95.00th=[ 642], | 99.00th=[ 642], 99.50th=[ 642], 99.90th=[ 642], 99.95th=[ 642], | 99.99th=[ 642] bw ( KiB/s): min= 1914, max= 2027, per=39.71%, avg=1976.25, stdev=46.64, samples=4 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=4 lat (msec) : 2=8.33%, 250=8.33%, 500=58.33%, 750=25.00% cpu : usr=0.00%, sys=9.77%, ctx=181, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=7,5,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145595: Sun Aug 23 11:51:18 2026 read: IOPS=0, BW=376KiB/s (385kB/s)(2048KiB/5453msec) clat (msec): min=329, max=409, avg=369.35, stdev=56.63 lat (msec): min=329, max=409, avg=369.36, stdev=56.63 clat percentiles (msec): | 1.00th=[ 330], 5.00th=[ 330], 10.00th=[ 330], 20.00th=[ 330], | 30.00th=[ 330], 40.00th=[ 330], 50.00th=[ 330], 60.00th=[ 409], | 70.00th=[ 409], 80.00th=[ 409], 90.00th=[ 409], 95.00th=[ 409], | 99.00th=[ 409], 99.50th=[ 409], 99.90th=[ 409], 99.95th=[ 409], | 99.99th=[ 409] bw ( KiB/s): min= 1560, max= 2027, per=50.45%, avg=1793.50, stdev=330.22, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1878KiB/s (1923kB/s)(10.0MiB/5453msec); 0 zone resets clat (msec): min=210, max=861, avg=470.92, stdev=245.75 lat (msec): min=210, max=861, avg=471.25, stdev=245.60 clat percentiles (msec): | 1.00th=[ 211], 5.00th=[ 211], 10.00th=[ 211], 20.00th=[ 224], | 30.00th=[ 255], 40.00th=[ 326], 50.00th=[ 326], 60.00th=[ 481], | 70.00th=[ 550], 80.00th=[ 625], 90.00th=[ 844], 95.00th=[ 860], | 99.00th=[ 860], 99.50th=[ 860], 99.90th=[ 860], 99.95th=[ 860], | 99.99th=[ 860] bw ( KiB/s): min= 1878, max= 4079, per=50.64%, avg=2520.29, stdev=982.98, samples=7 iops : min= 1, max= 3, avg= 1.57, stdev= 0.98, samples=7 lat (msec) : 250=16.67%, 500=50.00%, 750=16.67%, 1000=16.67% cpu : usr=0.02%, sys=8.11%, ctx=129, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=2,10,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145596: Sun Aug 23 11:51:18 2026 read: IOPS=1, BW=1462KiB/s (1497kB/s)(6144KiB/4202msec) clat (usec): min=1620, max=688248, avg=203284.98, stdev=280485.80 lat (usec): min=1621, max=688250, avg=203286.46, stdev=280485.82 clat percentiles (usec): | 1.00th=[ 1614], 5.00th=[ 1614], 10.00th=[ 1614], 20.00th=[ 3064], | 30.00th=[ 3064], 40.00th=[ 5800], 50.00th=[ 5800], 60.00th=[135267], | 70.00th=[387974], 80.00th=[387974], 90.00th=[692061], 95.00th=[692061], | 99.00th=[692061], 99.50th=[692061], 99.90th=[692061], 99.95th=[692061], | 99.99th=[692061] bw ( KiB/s): min= 1984, max= 3757, per=72.84%, avg=2589.33, stdev=1011.46, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 write: IOPS=1, BW=1462KiB/s (1497kB/s)(6144KiB/4202msec); 0 zone resets clat (msec): min=238, max=1271, avg=496.52, stdev=398.49 lat (msec): min=238, max=1272, avg=496.67, stdev=398.62 clat percentiles (msec): | 1.00th=[ 239], 5.00th=[ 239], 10.00th=[ 239], 20.00th=[ 245], | 30.00th=[ 245], 40.00th=[ 251], 50.00th=[ 251], 60.00th=[ 456], | 70.00th=[ 518], 80.00th=[ 518], 90.00th=[ 1267], 95.00th=[ 1267], | 99.00th=[ 1267], 99.50th=[ 1267], 99.90th=[ 1267], 99.95th=[ 1267], | 99.99th=[ 1267] bw ( KiB/s): min= 1878, max= 3385, per=46.02%, avg=2290.25, stdev=731.16, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 lat (msec) : 2=8.33%, 4=8.33%, 10=8.33%, 250=25.00%, 500=25.00% lat (msec) : 750=16.67%, 2000=8.33% cpu : usr=0.00%, sys=9.52%, ctx=166, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=6,6,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145597: Sun Aug 23 11:51:18 2026 read: IOPS=0, BW=889KiB/s (910kB/s)(5120KiB/5760msec) clat (usec): min=549, max=558865, avg=303202.38, stdev=279411.86 lat (usec): min=550, max=558866, avg=303203.93, stdev=279412.12 clat percentiles (usec): | 1.00th=[ 553], 5.00th=[ 553], 10.00th=[ 553], 20.00th=[ 553], | 30.00th=[ 676], 40.00th=[ 676], 50.00th=[442500], 60.00th=[442500], | 70.00th=[513803], 80.00th=[513803], 90.00th=[557843], 95.00th=[557843], | 99.00th=[557843], 99.50th=[557843], 99.90th=[557843], 99.95th=[557843], | 99.99th=[557843] bw ( KiB/s): min= 1914, max= 3886, per=73.39%, avg=2609.00, stdev=1107.36, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 write: IOPS=1, BW=1244KiB/s (1274kB/s)(7168KiB/5760msec); 0 zone resets clat (msec): min=198, max=1175, avg=604.58, stdev=383.28 lat (msec): min=198, max=1175, avg=604.73, stdev=383.19 clat percentiles (msec): | 1.00th=[ 199], 5.00th=[ 199], 10.00th=[ 199], 20.00th=[ 213], | 30.00th=[ 317], 40.00th=[ 317], 50.00th=[ 625], 60.00th=[ 718], | 70.00th=[ 718], 80.00th=[ 986], 90.00th=[ 1183], 95.00th=[ 1183], | 99.00th=[ 1183], 99.50th=[ 1183], 99.90th=[ 1183], 99.95th=[ 1183], | 99.99th=[ 1183] bw ( KiB/s): min= 1519, max= 1984, per=37.23%, avg=1852.80, stdev=192.33, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 lat (usec) : 750=16.67% lat (msec) : 250=16.67%, 500=16.67%, 750=33.33%, 1000=8.33%, 2000=8.33% cpu : usr=0.02%, sys=7.43%, ctx=157, 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=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=3556KiB/s (3641kB/s), 376KiB/s-1550KiB/s (385kB/s-1587kB/s), io=20.0MiB (20.0MB), run=4202-5760msec WRITE: bw=4978KiB/s (5097kB/s), 1107KiB/s-1878KiB/s (1133kB/s-1923kB/s), io=28.0MiB (29.4MB), run=4202-5760msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145589: Sun Aug 23 11:51:19 2026 read: IOPS=1, BW=1806KiB/s (1849kB/s)(7168KiB/3969msec) clat (msec): min=53, max=495, avg=239.97, stdev=183.92 lat (msec): min=53, max=495, avg=239.97, stdev=183.92 clat percentiles (msec): | 1.00th=[ 54], 5.00th=[ 54], 10.00th=[ 54], 20.00th=[ 63], | 30.00th=[ 108], 40.00th=[ 108], 50.00th=[ 224], 60.00th=[ 266], | 70.00th=[ 266], 80.00th=[ 472], 90.00th=[ 498], 95.00th=[ 498], | 99.00th=[ 498], 99.50th=[ 498], 99.90th=[ 498], 99.95th=[ 498], | 99.99th=[ 498] bw ( KiB/s): min= 1712, max= 4923, per=89.49%, avg=2634.50, stdev=1530.61, samples=4 iops : min= 1, max= 4, avg= 1.75, stdev= 1.50, samples=4 write: IOPS=1, BW=1290KiB/s (1321kB/s)(5120KiB/3969msec); 0 zone resets clat (msec): min=257, max=762, avg=453.49, stdev=195.58 lat (msec): min=257, max=762, avg=453.59, stdev=195.57 clat percentiles (msec): | 1.00th=[ 257], 5.00th=[ 257], 10.00th=[ 257], 20.00th=[ 257], | 30.00th=[ 334], 40.00th=[ 334], 50.00th=[ 409], 60.00th=[ 409], | 70.00th=[ 506], 80.00th=[ 506], 90.00th=[ 760], 95.00th=[ 760], | 99.00th=[ 760], 99.50th=[ 760], 99.90th=[ 760], 99.95th=[ 760], | 99.99th=[ 760] bw ( KiB/s): min= 1641, max= 4096, per=59.41%, avg=2448.75, stdev=1113.30, samples=4 iops : min= 1, max= 4, avg= 1.75, stdev= 1.50, samples=4 lat (msec) : 100=16.67%, 250=16.67%, 500=50.00%, 750=8.33%, 1000=8.33% cpu : usr=0.00%, sys=3.02%, ctx=67, 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=145590: Sun Aug 23 11:51:19 2026 read: IOPS=0, BW=301KiB/s (308kB/s)(2048KiB/6808msec) clat (msec): min=81, max=888, avg=485.16, stdev=570.80 lat (msec): min=81, max=888, avg=485.16, stdev=570.80 clat percentiles (msec): | 1.00th=[ 82], 5.00th=[ 82], 10.00th=[ 82], 20.00th=[ 82], | 30.00th=[ 82], 40.00th=[ 82], 50.00th=[ 82], 60.00th=[ 885], | 70.00th=[ 885], 80.00th=[ 885], 90.00th=[ 885], 95.00th=[ 885], | 99.00th=[ 885], 99.50th=[ 885], 99.90th=[ 885], 99.95th=[ 885], | 99.99th=[ 885] bw ( KiB/s): min= 1673, max= 1723, per=57.68%, avg=1698.00, stdev=35.36, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1504KiB/s (1540kB/s)(10.0MiB/6808msec); 0 zone resets clat (msec): min=314, max=1237, avg=574.12, stdev=283.68 lat (msec): min=314, max=1238, avg=574.24, stdev=283.68 clat percentiles (msec): | 1.00th=[ 317], 5.00th=[ 317], 10.00th=[ 317], 20.00th=[ 363], | 30.00th=[ 376], 40.00th=[ 418], 50.00th=[ 418], 60.00th=[ 477], | 70.00th=[ 667], 80.00th=[ 667], 90.00th=[ 810], 95.00th=[ 1234], | 99.00th=[ 1234], 99.50th=[ 1234], 99.90th=[ 1234], 99.95th=[ 1234], | 99.99th=[ 1234] bw ( KiB/s): min= 1673, max= 3984, per=53.19%, avg=2192.43, stdev=804.34, samples=7 iops : min= 1, max= 3, avg= 1.43, stdev= 0.79, samples=7 lat (msec) : 100=8.33%, 500=50.00%, 750=16.67%, 1000=16.67%, 2000=8.33% cpu : usr=0.01%, sys=2.82%, ctx=94, 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=145591: Sun Aug 23 11:51:19 2026 read: IOPS=0, BW=1019KiB/s (1043kB/s)(6144KiB/6032msec) clat (msec): min=183, max=1061, avg=523.50, stdev=308.89 lat (msec): min=183, max=1061, avg=523.50, stdev=308.89 clat percentiles (msec): | 1.00th=[ 184], 5.00th=[ 184], 10.00th=[ 184], 20.00th=[ 296], | 30.00th=[ 296], 40.00th=[ 435], 50.00th=[ 435], 60.00th=[ 527], | 70.00th=[ 642], 80.00th=[ 642], 90.00th=[ 1062], 95.00th=[ 1062], | 99.00th=[ 1062], 99.50th=[ 1062], 99.90th=[ 1062], 99.95th=[ 1062], | 99.99th=[ 1062] bw ( KiB/s): min= 1712, max= 2048, per=63.76%, avg=1877.20, stdev=156.81, samples=5 iops : min= 1, max= 2, avg= 1.20, stdev= 0.45, samples=5 write: IOPS=0, BW=1019KiB/s (1043kB/s)(6144KiB/6032msec); 0 zone resets clat (msec): min=178, max=672, avg=470.23, stdev=200.83 lat (msec): min=178, max=672, avg=470.37, stdev=200.85 clat percentiles (msec): | 1.00th=[ 180], 5.00th=[ 180], 10.00th=[ 180], 20.00th=[ 351], | 30.00th=[ 351], 40.00th=[ 372], 50.00th=[ 372], 60.00th=[ 575], | 70.00th=[ 667], 80.00th=[ 667], 90.00th=[ 676], 95.00th=[ 676], | 99.00th=[ 676], 99.50th=[ 676], 99.90th=[ 676], 99.95th=[ 676], | 99.99th=[ 676] bw ( KiB/s): min= 1681, max= 4023, per=56.93%, avg=2346.80, stdev=947.87, samples=5 iops : min= 1, max= 3, avg= 1.40, stdev= 0.89, samples=5 lat (msec) : 250=16.67%, 500=33.33%, 750=41.67%, 2000=8.33% cpu : usr=0.00%, sys=1.99%, ctx=63, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=145592: Sun Aug 23 11:51:19 2026 read: IOPS=0, BW=736KiB/s (754kB/s)(5120KiB/6955msec) clat (msec): min=116, max=1228, avg=607.86, stdev=490.91 lat (msec): min=116, max=1228, avg=607.87, stdev=490.91 clat percentiles (msec): | 1.00th=[ 117], 5.00th=[ 117], 10.00th=[ 117], 20.00th=[ 117], | 30.00th=[ 146], 40.00th=[ 146], 50.00th=[ 584], 60.00th=[ 584], | 70.00th=[ 961], 80.00th=[ 961], 90.00th=[ 1234], 95.00th=[ 1234], | 99.00th=[ 1234], 99.50th=[ 1234], 99.90th=[ 1234], 99.95th=[ 1234], | 99.99th=[ 1234] bw ( KiB/s): min= 2031, max= 4023, per=91.59%, avg=2696.33, stdev=1148.93, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 write: IOPS=1, BW=1031KiB/s (1055kB/s)(7168KiB/6955msec); 0 zone resets clat (msec): min=236, max=1093, avg=547.01, stdev=349.43 lat (msec): min=237, max=1093, avg=547.33, stdev=349.31 clat percentiles (msec): | 1.00th=[ 239], 5.00th=[ 239], 10.00th=[ 239], 20.00th=[ 266], | 30.00th=[ 309], 40.00th=[ 309], 50.00th=[ 326], 60.00th=[ 693], | 70.00th=[ 693], 80.00th=[ 911], 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= 1670, max= 4023, per=55.28%, avg=2278.50, stdev=866.13, samples=6 iops : min= 1, max= 3, avg= 1.50, stdev= 0.84, samples=6 lat (msec) : 250=25.00%, 500=25.00%, 750=16.67%, 1000=16.67%, 2000=16.67% cpu : usr=0.01%, sys=2.53%, ctx=84, 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=2945KiB/s (3015kB/s), 301KiB/s-1806KiB/s (308kB/s-1849kB/s), io=20.0MiB (20.0MB), run=3969-6955msec WRITE: bw=4123KiB/s (4221kB/s), 1019KiB/s-1504KiB/s (1043kB/s-1540kB/s), io=28.0MiB (29.4MB), run=3969-6955msec 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=145609: Sun Aug 23 11:51:37 2026 read: IOPS=0, BW=4014KiB/s (4111kB/s)(12.0MiB/3061msec) clat (msec): min=900, max=997, avg=948.67, stdev=48.60 lat (msec): min=900, max=997, avg=948.67, stdev=48.60 clat percentiles (msec): | 1.00th=[ 902], 5.00th=[ 902], 10.00th=[ 902], 20.00th=[ 902], | 30.00th=[ 902], 40.00th=[ 953], 50.00th=[ 953], 60.00th=[ 953], | 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= 7699, max= 8159, per=100.00%, avg=7929.00, stdev=325.27, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 1000=100.00% cpu : usr=0.00%, sys=11.70%, ctx=266, 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=145610: Sun Aug 23 11:51:37 2026 read: IOPS=0, BW=978KiB/s (1001kB/s)(4096KiB/4189msec) clat (nsec): min=760390k, max=760390k, avg=760389523.00, stdev= 0.00 lat (nsec): min=760392k, max=760392k, avg=760392379.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 760], 5.00th=[ 760], 10.00th=[ 760], 20.00th=[ 760], | 30.00th=[ 760], 40.00th=[ 760], 50.00th=[ 760], 60.00th=[ 760], | 70.00th=[ 760], 80.00th=[ 760], 90.00th=[ 760], 95.00th=[ 760], | 99.00th=[ 760], 99.50th=[ 760], 99.90th=[ 760], 99.95th=[ 760], | 99.99th=[ 760] bw ( KiB/s): min= 8126, max= 8126, per=100.00%, avg=8126.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=1956KiB/s (2003kB/s)(8192KiB/4189msec); 0 zone resets clat (msec): min=1618, max=1624, avg=1621.72, stdev= 4.46 lat (msec): min=1625, max=1663, avg=1644.49, stdev=27.08 clat percentiles (msec): | 1.00th=[ 1620], 5.00th=[ 1620], 10.00th=[ 1620], 20.00th=[ 1620], | 30.00th=[ 1620], 40.00th=[ 1620], 50.00th=[ 1620], 60.00th=[ 1620], | 70.00th=[ 1620], 80.00th=[ 1620], 90.00th=[ 1620], 95.00th=[ 1620], | 99.00th=[ 1620], 99.50th=[ 1620], 99.90th=[ 1620], 99.95th=[ 1620], | 99.99th=[ 1620] bw ( KiB/s): min= 7907, max= 7907, per=100.00%, avg=7907.00, 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=0.02%, sys=3.25%, 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=145611: Sun Aug 23 11:51:37 2026 write: IOPS=0, BW=2996KiB/s (3068kB/s)(12.0MiB/4102msec); 0 zone resets clat (msec): min=530, max=1906, avg=1345.10, stdev=722.37 lat (msec): min=532, max=1909, avg=1346.95, stdev=722.43 clat percentiles (msec): | 1.00th=[ 531], 5.00th=[ 531], 10.00th=[ 531], 20.00th=[ 531], | 30.00th=[ 531], 40.00th=[ 1603], 50.00th=[ 1603], 60.00th=[ 1603], | 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= 8159, max= 8192, per=100.00%, avg=8175.50, stdev=23.33, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 750=33.33%, 2000=66.67% cpu : usr=0.00%, sys=3.17%, ctx=54, 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=145612: Sun Aug 23 11:51:37 2026 write: IOPS=0, BW=3175KiB/s (3251kB/s)(12.0MiB/3870msec); 0 zone resets clat (msec): min=1015, max=1550, avg=1253.80, stdev=272.56 lat (msec): min=1017, max=1552, avg=1255.63, stdev=272.51 clat percentiles (msec): | 1.00th=[ 1020], 5.00th=[ 1020], 10.00th=[ 1020], 20.00th=[ 1020], | 30.00th=[ 1020], 40.00th=[ 1200], 50.00th=[ 1200], 60.00th=[ 1200], | 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= 7907, max= 8126, per=100.00%, avg=8016.50, stdev=154.86, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 2000=100.00% cpu : usr=0.00%, sys=3.00%, ctx=65, majf=0, minf=8 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=3911KiB/s (4005kB/s), 978KiB/s-4014KiB/s (1001kB/s-4111kB/s), io=16.0MiB (16.8MB), run=3061-4189msec WRITE: bw=7822KiB/s (8010kB/s), 1956KiB/s-3175KiB/s (2003kB/s-3251kB/s), io=32.0MiB (33.6MB), run=3870-4189msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145605: Sun Aug 23 11:51:38 2026 read: IOPS=0, BW=3749KiB/s (3839kB/s)(12.0MiB/3278msec) clat (msec): min=978, max=1028, avg=995.81, stdev=28.50 lat (msec): min=978, max=1028, avg=995.82, stdev=28.50 clat percentiles (msec): | 1.00th=[ 978], 5.00th=[ 978], 10.00th=[ 978], 20.00th=[ 978], | 30.00th=[ 978], 40.00th=[ 978], 50.00th=[ 978], 60.00th=[ 978], | 70.00th=[ 1028], 80.00th=[ 1028], 90.00th=[ 1028], 95.00th=[ 1028], | 99.00th=[ 1028], 99.50th=[ 1028], 99.90th=[ 1028], 99.95th=[ 1028], | 99.99th=[ 1028] bw ( KiB/s): min= 8110, max= 8143, per=100.00%, avg=8126.50, stdev=23.33, 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=3.20%, 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=145606: Sun Aug 23 11:51:38 2026 read: IOPS=0, BW=1222KiB/s (1251kB/s)(4096KiB/3353msec) clat (nsec): min=268526k, max=268526k, avg=268526087.00, stdev= 0.00 lat (nsec): min=268529k, max=268529k, avg=268529095.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 271], 5.00th=[ 271], 10.00th=[ 271], 20.00th=[ 271], | 30.00th=[ 271], 40.00th=[ 271], 50.00th=[ 271], 60.00th=[ 271], | 70.00th=[ 271], 80.00th=[ 271], 90.00th=[ 271], 95.00th=[ 271], | 99.00th=[ 271], 99.50th=[ 271], 99.90th=[ 271], 99.95th=[ 271], | 99.99th=[ 271] bw ( KiB/s): min= 5461, max= 5461, per=100.00%, avg=5461.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2443KiB/s (2502kB/s)(8192KiB/3353msec); 0 zone resets clat (msec): min=1347, max=1550, avg=1448.87, stdev=143.77 lat (msec): min=1347, max=1550, avg=1449.28, stdev=143.69 clat percentiles (msec): | 1.00th=[ 1351], 5.00th=[ 1351], 10.00th=[ 1351], 20.00th=[ 1351], | 30.00th=[ 1351], 40.00th=[ 1351], 50.00th=[ 1351], 60.00th=[ 1552], | 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= 8094, max= 8094, per=100.00%, avg=8094.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 2000=66.67% cpu : usr=0.00%, sys=3.10%, ctx=52, 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=145607: Sun Aug 23 11:51:38 2026 write: IOPS=0, BW=2482KiB/s (2541kB/s)(12.0MiB/4951msec); 0 zone resets clat (msec): min=308, max=3156, avg=1612.33, stdev=1438.92 lat (msec): min=308, max=3156, avg=1613.76, stdev=1438.88 clat percentiles (msec): | 1.00th=[ 309], 5.00th=[ 309], 10.00th=[ 309], 20.00th=[ 309], | 30.00th=[ 309], 40.00th=[ 1368], 50.00th=[ 1368], 60.00th=[ 1368], | 70.00th=[ 3171], 80.00th=[ 3171], 90.00th=[ 3171], 95.00th=[ 3171], | 99.00th=[ 3171], 99.50th=[ 3171], 99.90th=[ 3171], 99.95th=[ 3171], | 99.99th=[ 3171] bw ( KiB/s): min= 8126, max= 8192, per=100.00%, avg=8159.00, stdev=46.67, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 500=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.04%, sys=2.65%, ctx=70, 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=145608: Sun Aug 23 11:51:38 2026 write: IOPS=1, BW=4765KiB/s (4879kB/s)(12.0MiB/2579msec); 0 zone resets clat (msec): min=547, max=1385, avg=844.68, stdev=469.12 lat (msec): min=547, max=1387, avg=845.83, stdev=469.92 clat percentiles (msec): | 1.00th=[ 550], 5.00th=[ 550], 10.00th=[ 550], 20.00th=[ 550], | 30.00th=[ 550], 40.00th=[ 600], 50.00th=[ 600], 60.00th=[ 600], | 70.00th=[ 1385], 80.00th=[ 1385], 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= 7968, max= 8192, per=100.00%, avg=8080.00, stdev=158.39, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 750=66.67%, 2000=33.33% cpu : usr=0.00%, sys=4.34%, ctx=34, 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=4886KiB/s (5004kB/s), 1222KiB/s-3749KiB/s (1251kB/s-3839kB/s), io=16.0MiB (16.8MB), run=3278-3353msec WRITE: bw=6618KiB/s (6777kB/s), 2443KiB/s-4765KiB/s (2502kB/s-4879kB/s), io=32.0MiB (33.6MB), run=2579-4951msec