== sanity test 398b: DIO and buffer IO race ============== 13:24:08 (1777051448) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 6.49893 s, 7.7 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=146426: Fri Apr 24 13:26:39 2026 read: IOPS=11, BW=46.0KiB/s (48.1kB/s)(5992KiB/127562msec) clat (usec): min=51, max=1684.3k, avg=42543.43, stdev=52332.07 lat (usec): min=54, max=1684.3k, avg=42548.33, stdev=52330.47 clat percentiles (usec): | 1.00th=[ 108], 5.00th=[ 206], 10.00th=[ 15401], | 20.00th=[ 22152], 30.00th=[ 26084], 40.00th=[ 29754], | 50.00th=[ 34866], 60.00th=[ 41157], 70.00th=[ 50070], | 80.00th=[ 59507], 90.00th=[ 74974], 95.00th=[ 88605], | 99.00th=[ 141558], 99.50th=[ 202376], 99.90th=[ 341836], | 99.95th=[1686111], 99.99th=[1686111] bw ( KiB/s): min= 6, max= 103, per=25.26%, avg=46.98, stdev=18.70, samples=250 iops : min= 1, max= 25, avg=11.09, stdev= 4.68, samples=250 write: IOPS=12, BW=49.4KiB/s (50.5kB/s)(6296KiB/127562msec); 0 zone resets clat (usec): min=1807, max=439887, avg=40182.35, stdev=37527.81 lat (usec): min=1809, max=439889, avg=40185.96, stdev=37528.03 clat percentiles (msec): | 1.00th=[ 3], 5.00th=[ 5], 10.00th=[ 7], 20.00th=[ 9], | 30.00th=[ 13], 40.00th=[ 23], 50.00th=[ 32], 60.00th=[ 41], | 70.00th=[ 51], 80.00th=[ 65], 90.00th=[ 86], 95.00th=[ 112], | 99.00th=[ 161], 99.50th=[ 197], 99.90th=[ 334], 99.95th=[ 439], | 99.99th=[ 439] bw ( KiB/s): min= 7, max= 103, per=25.54%, avg=49.54, stdev=19.68, samples=249 iops : min= 1, max= 25, avg=11.72, stdev= 4.94, samples=249 lat (usec) : 100=0.42%, 250=2.60%, 500=0.72%, 750=0.23%, 1000=0.07% lat (msec) : 2=0.16%, 4=1.50%, 10=11.07%, 20=10.42%, 50=42.45% lat (msec) : 100=25.36%, 250=4.75%, 500=0.23%, 2000=0.03% cpu : usr=0.09%, sys=18.49%, ctx=10118, 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=146428: Fri Apr 24 13:26:39 2026 read: IOPS=11, BW=46.3KiB/s (47.5kB/s)(5940KiB/128156msec) clat (usec): min=56, max=279894, avg=41816.70, stdev=28058.29 lat (usec): min=57, max=279897, avg=41820.95, stdev=28059.05 clat percentiles (usec): | 1.00th=[ 106], 5.00th=[ 237], 10.00th=[ 16581], 20.00th=[ 21627], | 30.00th=[ 26084], 40.00th=[ 31065], 50.00th=[ 36963], 60.00th=[ 42730], | 70.00th=[ 50594], 80.00th=[ 60031], 90.00th=[ 74974], 95.00th=[ 90702], | 99.00th=[137364], 99.50th=[160433], 99.90th=[258999], 99.95th=[278922], | 99.99th=[278922] bw ( KiB/s): min= 6, max= 111, per=25.08%, avg=46.64, stdev=18.16, samples=249 iops : min= 1, max= 27, avg=11.00, stdev= 4.54, samples=249 write: IOPS=12, BW=49.5KiB/s (50.7kB/s)(6348KiB/128156msec); 0 zone resets clat (usec): min=1724, max=1679.6k, avg=41305.41, stdev=54801.24 lat (usec): min=1726, max=1679.6k, avg=41309.79, stdev=54800.40 clat percentiles (msec): | 1.00th=[ 3], 5.00th=[ 5], 10.00th=[ 7], 20.00th=[ 10], | 30.00th=[ 14], 40.00th=[ 24], 50.00th=[ 33], 60.00th=[ 42], | 70.00th=[ 53], 80.00th=[ 66], 90.00th=[ 87], 95.00th=[ 107], | 99.00th=[ 153], 99.50th=[ 180], 99.90th=[ 468], 99.95th=[ 1687], | 99.99th=[ 1687] bw ( KiB/s): min= 7, max= 135, per=25.46%, avg=49.39, stdev=21.81, samples=251 iops : min= 1, max= 33, avg=11.69, stdev= 5.48, samples=251 lat (usec) : 100=0.39%, 250=2.15%, 500=0.68%, 750=0.13%, 1000=0.07% lat (msec) : 2=0.29%, 4=1.27%, 10=10.22%, 20=11.72%, 50=42.06% lat (msec) : 100=26.33%, 250=4.49%, 500=0.16%, 2000=0.03% cpu : usr=0.07%, sys=18.76%, ctx=10097, 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=146430: Fri Apr 24 13:26:39 2026 read: IOPS=11, BW=46.7KiB/s (47.9kB/s)(6028KiB/128954msec) clat (usec): min=52, max=826878, avg=41301.82, stdev=34281.48 lat (usec): min=53, max=826881, avg=41306.52, stdev=34282.03 clat percentiles (usec): | 1.00th=[ 97], 5.00th=[ 217], 10.00th=[ 15795], 20.00th=[ 21890], | 30.00th=[ 26346], 40.00th=[ 30016], 50.00th=[ 35390], 60.00th=[ 41157], | 70.00th=[ 49021], 80.00th=[ 58459], 90.00th=[ 72877], 95.00th=[ 90702], | 99.00th=[126354], 99.50th=[160433], 99.90th=[350225], 99.95th=[826278], | 99.99th=[826278] bw ( KiB/s): min= 7, max= 127, per=25.13%, avg=46.73, stdev=19.44, samples=251 iops : min= 1, max= 31, avg=11.02, stdev= 4.88, samples=251 write: IOPS=12, BW=48.5KiB/s (49.7kB/s)(6260KiB/128954msec); 0 zone resets clat (usec): min=1681, max=1681.1k, avg=42315.30, stdev=56177.40 lat (usec): min=1683, max=1681.1k, avg=42320.15, stdev=56177.18 clat percentiles (msec): | 1.00th=[ 3], 5.00th=[ 5], 10.00th=[ 7], 20.00th=[ 9], | 30.00th=[ 13], 40.00th=[ 23], 50.00th=[ 34], 60.00th=[ 43], | 70.00th=[ 54], 80.00th=[ 68], 90.00th=[ 89], 95.00th=[ 112], | 99.00th=[ 167], 99.50th=[ 211], 99.90th=[ 355], 99.95th=[ 1687], | 99.99th=[ 1687] bw ( KiB/s): min= 8, max= 135, per=24.91%, avg=48.32, stdev=18.33, samples=252 iops : min= 2, max= 33, avg=11.42, stdev= 4.58, samples=252 lat (usec) : 100=0.65%, 250=2.28%, 500=0.68%, 750=0.13%, 1000=0.20% lat (msec) : 2=0.33%, 4=1.56%, 10=10.42%, 20=10.71%, 50=41.76% lat (msec) : 100=26.27%, 250=4.82%, 500=0.13%, 1000=0.03%, 2000=0.03% cpu : usr=0.08%, sys=18.60%, ctx=10010, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=146432: Fri Apr 24 13:26:39 2026 read: IOPS=11, BW=46.9KiB/s (48.0kB/s)(6052KiB/129038msec) clat (usec): min=51, max=1721.9k, avg=42286.83, stdev=51181.12 lat (usec): min=51, max=1721.9k, avg=42293.87, stdev=51180.57 clat percentiles (usec): | 1.00th=[ 92], 5.00th=[ 200], 10.00th=[ 15401], | 20.00th=[ 22152], 30.00th=[ 26346], 40.00th=[ 30540], | 50.00th=[ 35390], 60.00th=[ 41681], 70.00th=[ 50070], | 80.00th=[ 60031], 90.00th=[ 73925], 95.00th=[ 90702], | 99.00th=[ 137364], 99.50th=[ 149947], 99.90th=[ 246416], | 99.95th=[1719665], 99.99th=[1719665] bw ( KiB/s): min= 7, max= 111, per=25.51%, avg=47.45, stdev=18.57, samples=250 iops : min= 1, max= 27, avg=11.20, stdev= 4.63, samples=250 write: IOPS=12, BW=48.3KiB/s (49.5kB/s)(6236KiB/129038msec); 0 zone resets clat (usec): min=1909, max=428672, avg=41385.51, stdev=41575.37 lat (usec): min=1911, max=428675, avg=41398.82, stdev=41599.97 clat percentiles (msec): | 1.00th=[ 3], 5.00th=[ 5], 10.00th=[ 7], 20.00th=[ 9], | 30.00th=[ 13], 40.00th=[ 21], 50.00th=[ 33], 60.00th=[ 42], | 70.00th=[ 52], 80.00th=[ 68], 90.00th=[ 88], 95.00th=[ 114], | 99.00th=[ 192], 99.50th=[ 228], 99.90th=[ 384], 99.95th=[ 430], | 99.99th=[ 430] bw ( KiB/s): min= 7, max= 135, per=24.87%, avg=48.26, stdev=21.51, samples=253 iops : min= 1, max= 33, avg=11.40, stdev= 5.40, samples=253 lat (usec) : 100=0.62%, 250=2.70%, 500=0.72%, 750=0.13%, 1000=0.07% lat (msec) : 2=0.03%, 4=1.40%, 10=11.23%, 20=10.97%, 50=41.54% lat (msec) : 100=25.20%, 250=5.14%, 500=0.23%, 2000=0.03% cpu : usr=0.08%, sys=18.54%, ctx=9894, 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=186KiB/s (191kB/s), 46.3KiB/s-46.0KiB/s (47.5kB/s-48.1kB/s), io=23.4MiB (24.6MB), run=127562-129038msec WRITE: bw=195KiB/s (200kB/s), 48.3KiB/s-49.5KiB/s (49.5kB/s-50.7kB/s), io=24.6MiB (25.7MB), run=127562-129038msec fio: pid=146429, err=5/file:backend.c:481, func=full resid, error=Input/output error rand-rw: (groupid=0, jobs=1): err= 0: pid=146425: Fri Apr 24 13:27:58 2026 read: IOPS=7, BW=28.8KiB/s (29.4kB/s)(5992KiB/208392msec) clat (msec): min=6, max=1699, avg=35.71, stdev=54.59 lat (msec): min=6, max=1699, avg=35.71, stdev=54.59 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 13], | 30.00th=[ 16], 40.00th=[ 19], 50.00th=[ 23], 60.00th=[ 28], | 70.00th=[ 36], 80.00th=[ 52], 90.00th=[ 79], 95.00th=[ 100], | 99.00th=[ 157], 99.50th=[ 209], 99.90th=[ 414], 99.95th=[ 1703], | 99.99th=[ 1703] bw ( KiB/s): min= 7, max= 111, per=30.85%, avg=30.85, stdev=21.65, samples=379 iops : min= 1, max= 27, avg= 7.15, stdev= 5.48, samples=379 write: IOPS=7, BW=30.2KiB/s (30.9kB/s)(6296KiB/208392msec); 0 zone resets clat (msec): min=30, max=848, avg=98.10, stdev=59.92 lat (msec): min=30, max=848, avg=98.10, stdev=59.92 clat percentiles (msec): | 1.00th=[ 35], 5.00th=[ 44], 10.00th=[ 47], 20.00th=[ 55], | 30.00th=[ 62], 40.00th=[ 69], 50.00th=[ 79], 60.00th=[ 92], | 70.00th=[ 113], 80.00th=[ 140], 90.00th=[ 174], 95.00th=[ 207], | 99.00th=[ 279], 99.50th=[ 317], 99.90th=[ 676], 99.95th=[ 852], | 99.99th=[ 852] bw ( KiB/s): min= 7, max= 79, per=28.76%, avg=30.20, stdev=16.68, samples=406 iops : min= 1, max= 19, avg= 6.98, stdev= 4.27, samples=406 lat (msec) : 10=4.17%, 20=17.25%, 50=24.64%, 100=33.37%, 250=19.53% lat (msec) : 500=0.94%, 750=0.03%, 1000=0.03%, 2000=0.03% cpu : usr=0.07%, sys=5.58%, ctx=7385, 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=146427: Fri Apr 24 13:27:58 2026 read: IOPS=7, BW=28.5KiB/s (29.2kB/s)(5940KiB/208346msec) clat (msec): min=5, max=1763, avg=37.84, stdev=61.52 lat (msec): min=5, max=1763, avg=37.84, stdev=61.52 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 16], 40.00th=[ 20], 50.00th=[ 24], 60.00th=[ 29], | 70.00th=[ 36], 80.00th=[ 52], 90.00th=[ 80], 95.00th=[ 108], | 99.00th=[ 182], 99.50th=[ 275], 99.90th=[ 735], 99.95th=[ 1770], | 99.99th=[ 1770] bw ( KiB/s): min= 7, max= 112, per=30.61%, avg=30.61, stdev=21.30, samples=378 iops : min= 1, max= 28, avg= 7.09, stdev= 5.40, samples=378 write: IOPS=7, BW=30.5KiB/s (31.2kB/s)(6348KiB/208346msec); 0 zone resets clat (msec): min=26, max=425, avg=95.55, stdev=53.09 lat (msec): min=26, max=425, avg=95.56, stdev=53.09 clat percentiles (msec): | 1.00th=[ 36], 5.00th=[ 43], 10.00th=[ 46], 20.00th=[ 54], | 30.00th=[ 62], 40.00th=[ 69], 50.00th=[ 78], 60.00th=[ 91], | 70.00th=[ 109], 80.00th=[ 138], 90.00th=[ 171], 95.00th=[ 199], | 99.00th=[ 275], 99.50th=[ 305], 99.90th=[ 422], 99.95th=[ 426], | 99.99th=[ 426] bw ( KiB/s): min= 7, max= 72, per=29.10%, avg=30.55, stdev=16.77, samples=405 iops : min= 1, max= 18, avg= 7.07, stdev= 4.28, samples=405 lat (msec) : 10=4.00%, 20=15.98%, 50=25.94%, 100=32.91%, 250=20.05% lat (msec) : 500=1.04%, 750=0.03%, 2000=0.03% cpu : usr=0.08%, sys=5.58%, ctx=7292, 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=1485,1587,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 5 (file:backend.c:481, func=full resid, error=Input/output error): pid=146429: Fri Apr 24 13:27:58 2026 read: IOPS=5, BW=21.2KiB/s (21.7kB/s)(3048KiB/143779msec) clat (msec): min=7, max=619, avg=52.60, stdev=43.51 lat (msec): min=7, max=619, avg=52.61, stdev=43.51 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 16], 20.00th=[ 22], | 30.00th=[ 29], 40.00th=[ 35], 50.00th=[ 42], 60.00th=[ 52], | 70.00th=[ 60], 80.00th=[ 75], 90.00th=[ 102], 95.00th=[ 127], | 99.00th=[ 197], 99.50th=[ 234], 99.90th=[ 617], 99.95th=[ 617], | 99.99th=[ 617] bw ( KiB/s): min= 7, max= 87, per=22.29%, avg=22.29, stdev=15.14, samples=262 iops : min= 1, max= 21, avg= 4.96, stdev= 3.82, samples=262 write: IOPS=5, BW=21.4KiB/s (21.9kB/s)(3072KiB/143779msec); 0 zone resets clat (msec): min=33, max=1815, avg=134.44, stdev=86.87 lat (msec): min=33, max=1815, avg=134.44, stdev=86.87 clat percentiles (msec): | 1.00th=[ 42], 5.00th=[ 54], 10.00th=[ 64], 20.00th=[ 83], | 30.00th=[ 96], 40.00th=[ 107], 50.00th=[ 122], 60.00th=[ 138], | 70.00th=[ 157], 80.00th=[ 176], 90.00th=[ 209], 95.00th=[ 245], | 99.00th=[ 321], 99.50th=[ 368], 99.90th=[ 1821], 99.95th=[ 1821], | 99.99th=[ 1821] bw ( KiB/s): min= 7, max= 71, per=20.54%, avg=21.56, stdev=11.00, samples=273 iops : min= 1, max= 17, avg= 4.77, stdev= 2.79, samples=273 lat (msec) : 10=1.31%, 20=7.58%, 50=22.40%, 100=29.78%, 250=36.45% lat (msec) : 500=2.22%, 750=0.13%, 2000=0.07% cpu : usr=0.04%, sys=5.16%, ctx=3705, majf=0, minf=21 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=763,768,0,0 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=146431: Fri Apr 24 13:27:58 2026 read: IOPS=7, BW=29.2KiB/s (29.9kB/s)(6052KiB/207483msec) clat (msec): min=5, max=631, avg=35.21, stdev=36.78 lat (msec): min=5, max=631, avg=35.21, stdev=36.78 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 11], 20.00th=[ 13], | 30.00th=[ 16], 40.00th=[ 19], 50.00th=[ 23], 60.00th=[ 28], | 70.00th=[ 36], 80.00th=[ 52], 90.00th=[ 79], 95.00th=[ 105], | 99.00th=[ 157], 99.50th=[ 215], 99.90th=[ 296], 99.95th=[ 634], | 99.99th=[ 634] bw ( KiB/s): min= 7, max= 135, per=31.52%, avg=31.52, stdev=21.86, samples=374 iops : min= 1, max= 33, avg= 7.31, stdev= 5.54, samples=374 write: IOPS=7, BW=30.1KiB/s (30.8kB/s)(6236KiB/207483msec); 0 zone resets clat (msec): min=31, max=1812, avg=98.59, stdev=72.55 lat (msec): min=31, max=1812, avg=98.60, stdev=72.55 clat percentiles (msec): | 1.00th=[ 36], 5.00th=[ 42], 10.00th=[ 47], 20.00th=[ 55], | 30.00th=[ 61], 40.00th=[ 69], 50.00th=[ 79], 60.00th=[ 92], | 70.00th=[ 110], 80.00th=[ 140], 90.00th=[ 178], 95.00th=[ 207], | 99.00th=[ 279], 99.50th=[ 334], 99.90th=[ 852], 99.95th=[ 1821], | 99.99th=[ 1821] bw ( KiB/s): min= 7, max= 80, per=28.57%, avg=30.00, stdev=17.00, samples=404 iops : min= 1, max= 20, avg= 6.93, stdev= 4.35, samples=404 lat (msec) : 10=3.91%, 20=17.87%, 50=24.48%, 100=33.46%, 250=19.11% lat (msec) : 500=1.07%, 750=0.03%, 1000=0.03%, 2000=0.03% cpu : usr=0.08%, sys=5.48%, ctx=7341, 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=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=101KiB/s (103kB/s), 21.2KiB/s-29.2KiB/s (21.7kB/s-29.9kB/s), io=20.5MiB (21.5MB), run=143779-208392msec WRITE: bw=105KiB/s (108kB/s), 21.4KiB/s-30.5KiB/s (21.9kB/s-31.2kB/s), io=21.4MiB (22.5MB), run=143779-208392msec 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=146482: Fri Apr 24 13:28:41 2026 read: IOPS=13, BW=211KiB/s (216kB/s)(5920KiB/28095msec) clat (usec): min=48, max=158192, avg=36430.07, stdev=25208.45 lat (usec): min=49, max=158193, avg=36432.91, stdev=25208.55 clat percentiles (usec): | 1.00th=[ 86], 5.00th=[ 176], 10.00th=[ 273], 20.00th=[ 16450], | 30.00th=[ 26346], 40.00th=[ 31065], 50.00th=[ 35914], 60.00th=[ 40109], | 70.00th=[ 46400], 80.00th=[ 54789], 90.00th=[ 68682], 95.00th=[ 79168], | 99.00th=[104334], 99.50th=[131597], 99.90th=[158335], 99.95th=[158335], | 99.99th=[158335] bw ( KiB/s): min= 64, max= 352, per=26.43%, avg=209.31, stdev=69.31, samples=55 iops : min= 4, max= 22, avg=12.38, stdev= 4.40, samples=55 write: IOPS=14, BW=227KiB/s (232kB/s)(6368KiB/28095msec); 0 zone resets clat (msec): min=3, max=197, avg=36.29, stdev=29.81 lat (msec): min=3, max=197, avg=36.30, stdev=29.81 clat percentiles (msec): | 1.00th=[ 5], 5.00th=[ 7], 10.00th=[ 9], 20.00th=[ 12], | 30.00th=[ 15], 40.00th=[ 20], 50.00th=[ 27], 60.00th=[ 35], | 70.00th=[ 47], 80.00th=[ 61], 90.00th=[ 78], 95.00th=[ 92], | 99.00th=[ 130], 99.50th=[ 153], 99.90th=[ 199], 99.95th=[ 199], | 99.99th=[ 199] bw ( KiB/s): min= 31, max= 448, per=27.11%, avg=226.07, stdev=76.58, samples=55 iops : min= 1, max= 28, avg=13.45, stdev= 4.90, samples=55 lat (usec) : 50=0.26%, 100=0.52%, 250=3.52%, 500=3.12%, 750=1.17% lat (usec) : 1000=0.26% lat (msec) : 2=0.26%, 4=0.39%, 10=7.29%, 20=15.10%, 50=42.19% lat (msec) : 100=23.31%, 250=2.60% cpu : usr=0.10%, sys=24.76%, ctx=2691, 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=146484: Fri Apr 24 13:28:41 2026 read: IOPS=11, BW=192KiB/s (196kB/s)(5744KiB/29952msec) clat (usec): min=80, max=233051, avg=41908.35, stdev=32515.93 lat (usec): min=81, max=233053, avg=41911.48, stdev=32515.66 clat percentiles (usec): | 1.00th=[ 118], 5.00th=[ 176], 10.00th=[ 273], 20.00th=[ 19268], | 30.00th=[ 27919], 40.00th=[ 32113], 50.00th=[ 39060], 60.00th=[ 45351], | 70.00th=[ 54264], 80.00th=[ 63177], 90.00th=[ 73925], 95.00th=[ 89654], | 99.00th=[183501], 99.50th=[214959], 99.90th=[233833], 99.95th=[233833], | 99.99th=[233833] bw ( KiB/s): min= 31, max= 384, per=24.07%, avg=190.63, stdev=78.21, samples=59 iops : min= 1, max= 24, avg=11.22, stdev= 5.00, samples=59 write: IOPS=13, BW=218KiB/s (224kB/s)(6544KiB/29952msec); 0 zone resets clat (msec): min=3, max=136, avg=36.28, stdev=26.99 lat (msec): min=3, max=136, avg=36.29, stdev=26.99 clat percentiles (msec): | 1.00th=[ 5], 5.00th=[ 8], 10.00th=[ 9], 20.00th=[ 12], | 30.00th=[ 17], 40.00th=[ 22], 50.00th=[ 31], 60.00th=[ 37], | 70.00th=[ 47], 80.00th=[ 57], 90.00th=[ 74], 95.00th=[ 93], | 99.00th=[ 115], 99.50th=[ 121], 99.90th=[ 136], 99.95th=[ 136], | 99.99th=[ 136] bw ( KiB/s): min= 91, max= 480, per=26.00%, avg=216.85, stdev=87.04, samples=59 iops : min= 5, max= 30, avg=12.86, stdev= 5.58, samples=59 lat (usec) : 100=0.26%, 250=3.52%, 500=3.39%, 750=0.52%, 1000=0.26% lat (msec) : 4=0.65%, 10=7.16%, 20=13.02%, 50=41.41%, 100=26.17% lat (msec) : 250=3.65% cpu : usr=0.10%, sys=24.27%, ctx=2758, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=359,409,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=146486: Fri Apr 24 13:28:41 2026 read: IOPS=12, BW=207KiB/s (212kB/s)(6256KiB/30211msec) clat (usec): min=87, max=223118, avg=39296.31, stdev=29117.45 lat (usec): min=89, max=223122, avg=39298.68, stdev=29117.29 clat percentiles (usec): | 1.00th=[ 101], 5.00th=[ 149], 10.00th=[ 223], 20.00th=[ 14746], | 30.00th=[ 24249], 40.00th=[ 31065], 50.00th=[ 38011], 60.00th=[ 44827], | 70.00th=[ 51643], 80.00th=[ 62129], 90.00th=[ 72877], 95.00th=[ 85459], | 99.00th=[105382], 99.50th=[170918], 99.90th=[223347], 99.95th=[223347], | 99.99th=[223347] bw ( KiB/s): min= 31, max= 436, per=26.37%, avg=208.88, stdev=81.12, samples=58 iops : min= 1, max= 27, avg=12.36, stdev= 5.09, samples=58 write: IOPS=12, BW=200KiB/s (204kB/s)(6032KiB/30211msec); 0 zone resets clat (msec): min=3, max=204, avg=38.71, stdev=31.62 lat (msec): min=3, max=204, avg=38.72, stdev=31.62 clat percentiles (msec): | 1.00th=[ 5], 5.00th=[ 7], 10.00th=[ 9], 20.00th=[ 13], | 30.00th=[ 16], 40.00th=[ 23], 50.00th=[ 32], 60.00th=[ 40], | 70.00th=[ 48], 80.00th=[ 61], 90.00th=[ 80], 95.00th=[ 103], | 99.00th=[ 148], 99.50th=[ 155], 99.90th=[ 205], 99.95th=[ 205], | 99.99th=[ 205] bw ( KiB/s): min= 31, max= 381, per=23.33%, avg=194.58, stdev=73.25, samples=59 iops : min= 1, max= 23, avg=11.46, stdev= 4.55, samples=59 lat (usec) : 100=0.39%, 250=6.38%, 500=2.21%, 750=0.65%, 1000=0.13% lat (msec) : 4=0.39%, 10=6.64%, 20=11.46%, 50=41.41%, 100=26.82% lat (msec) : 250=3.52% cpu : usr=0.12%, sys=23.38%, ctx=2804, 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=146488: Fri Apr 24 13:28:41 2026 read: IOPS=12, BW=204KiB/s (209kB/s)(6032KiB/29538msec) clat (usec): min=67, max=222690, avg=39207.32, stdev=30696.52 lat (usec): min=67, max=222692, avg=39210.51, stdev=30697.50 clat percentiles (usec): | 1.00th=[ 97], 5.00th=[ 155], 10.00th=[ 196], 20.00th=[ 1319], | 30.00th=[ 26608], 40.00th=[ 32375], 50.00th=[ 36439], 60.00th=[ 44303], | 70.00th=[ 51643], 80.00th=[ 59507], 90.00th=[ 74974], 95.00th=[ 88605], | 99.00th=[166724], 99.50th=[187696], 99.90th=[223347], 99.95th=[223347], | 99.99th=[223347] bw ( KiB/s): min= 30, max= 380, per=25.87%, avg=204.91, stdev=69.27, samples=57 iops : min= 1, max= 23, avg=12.11, stdev= 4.43, samples=57 write: IOPS=13, BW=212KiB/s (217kB/s)(6256KiB/29538msec); 0 zone resets clat (msec): min=2, max=140, avg=37.10, stdev=29.11 lat (msec): min=2, max=140, avg=37.11, stdev=29.11 clat percentiles (msec): | 1.00th=[ 4], 5.00th=[ 7], 10.00th=[ 9], 20.00th=[ 12], | 30.00th=[ 16], 40.00th=[ 21], 50.00th=[ 28], 60.00th=[ 37], | 70.00th=[ 48], 80.00th=[ 63], 90.00th=[ 80], 95.00th=[ 94], | 99.00th=[ 132], 99.50th=[ 140], 99.90th=[ 140], 99.95th=[ 140], | 99.99th=[ 140] bw ( KiB/s): min= 95, max= 380, per=25.02%, avg=208.69, stdev=59.78, samples=58 iops : min= 5, max= 23, avg=12.36, stdev= 3.76, samples=58 lat (usec) : 100=0.65%, 250=5.86%, 500=2.47%, 750=0.78% lat (msec) : 2=0.26%, 4=1.04%, 10=6.64%, 20=14.32%, 50=37.50% lat (msec) : 100=27.47%, 250=2.99% cpu : usr=0.10%, sys=23.54%, ctx=2655, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=793KiB/s (812kB/s), 192KiB/s-211KiB/s (196kB/s-216kB/s), io=23.4MiB (24.5MB), run=28095-30211msec WRITE: bw=834KiB/s (854kB/s), 200KiB/s-227KiB/s (204kB/s-232kB/s), io=24.6MiB (25.8MB), run=28095-30211msec rand-rw: (groupid=0, jobs=1): err= 0: pid=146481: Fri Apr 24 13:29:26 2026 read: IOPS=4, BW=79.9KiB/s (81.9kB/s)(5920KiB/74058msec) clat (msec): min=12, max=248, avg=50.00, stdev=32.80 lat (msec): min=12, max=248, avg=50.01, stdev=32.79 clat percentiles (msec): | 1.00th=[ 16], 5.00th=[ 20], 10.00th=[ 23], 20.00th=[ 28], | 30.00th=[ 33], 40.00th=[ 35], 50.00th=[ 42], 60.00th=[ 47], | 70.00th=[ 54], 80.00th=[ 63], 90.00th=[ 82], 95.00th=[ 120], | 99.00th=[ 182], 99.50th=[ 207], 99.90th=[ 249], 99.95th=[ 249], | 99.99th=[ 249] bw ( KiB/s): min= 31, max= 223, per=27.02%, avg=85.91, stdev=46.73, samples=136 iops : min= 1, max= 13, avg= 4.52, stdev= 2.92, samples=136 write: IOPS=5, BW=85.0KiB/s (88.1kB/s)(6368KiB/74058msec); 0 zone resets clat (msec): min=47, max=408, avg=139.03, stdev=49.92 lat (msec): min=47, max=409, avg=139.04, stdev=49.91 clat percentiles (msec): | 1.00th=[ 53], 5.00th=[ 75], 10.00th=[ 86], 20.00th=[ 99], | 30.00th=[ 109], 40.00th=[ 118], 50.00th=[ 129], 60.00th=[ 144], | 70.00th=[ 161], 80.00th=[ 178], 90.00th=[ 203], 95.00th=[ 224], | 99.00th=[ 305], 99.50th=[ 334], 99.90th=[ 409], 99.95th=[ 409], | 99.99th=[ 409] bw ( KiB/s): min= 28, max= 160, per=26.02%, avg=87.17, stdev=30.06, samples=144 iops : min= 1, max= 10, avg= 4.60, stdev= 1.92, samples=144 lat (msec) : 20=2.73%, 50=28.91%, 100=24.48%, 250=42.32%, 500=1.56% cpu : usr=0.04%, sys=4.49%, ctx=2082, 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=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=146483: Fri Apr 24 13:29:26 2026 read: IOPS=4, BW=76.4KiB/s (78.2kB/s)(5744KiB/75219msec) clat (msec): min=12, max=224, avg=47.37, stdev=30.04 lat (msec): min=12, max=224, avg=47.38, stdev=30.04 clat percentiles (msec): | 1.00th=[ 15], 5.00th=[ 18], 10.00th=[ 21], 20.00th=[ 27], | 30.00th=[ 31], 40.00th=[ 35], 50.00th=[ 37], 60.00th=[ 44], | 70.00th=[ 52], 80.00th=[ 65], 90.00th=[ 84], 95.00th=[ 107], | 99.00th=[ 167], 99.50th=[ 192], 99.90th=[ 226], 99.95th=[ 226], | 99.99th=[ 226] bw ( KiB/s): min= 28, max= 317, per=26.54%, avg=84.38, stdev=53.86, samples=133 iops : min= 1, max= 19, avg= 4.41, stdev= 3.40, samples=133 write: IOPS=5, BW=86.0KiB/s (89.1kB/s)(6544KiB/75219msec); 0 zone resets clat (msec): min=48, max=383, avg=141.72, stdev=50.45 lat (msec): min=48, max=383, avg=141.73, stdev=50.45 clat percentiles (msec): | 1.00th=[ 63], 5.00th=[ 79], 10.00th=[ 89], 20.00th=[ 101], | 30.00th=[ 110], 40.00th=[ 121], 50.00th=[ 132], 60.00th=[ 144], | 70.00th=[ 161], 80.00th=[ 180], 90.00th=[ 213], 95.00th=[ 228], | 99.00th=[ 300], 99.50th=[ 338], 99.90th=[ 384], 99.95th=[ 384], | 99.99th=[ 384] bw ( KiB/s): min= 31, max= 160, per=25.94%, avg=86.91, stdev=30.43, samples=148 iops : min= 1, max= 10, avg= 4.58, stdev= 1.93, samples=148 lat (msec) : 20=3.78%, 50=28.39%, 100=22.40%, 250=44.01%, 500=1.43% cpu : usr=0.07%, sys=4.26%, ctx=2071, 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=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=146485: Fri Apr 24 13:29:26 2026 read: IOPS=5, BW=86.3KiB/s (88.4kB/s)(6256KiB/72462msec) clat (msec): min=12, max=226, avg=50.78, stdev=32.94 lat (msec): min=12, max=226, avg=50.78, stdev=32.94 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 19], 10.00th=[ 22], 20.00th=[ 27], | 30.00th=[ 31], 40.00th=[ 36], 50.00th=[ 43], 60.00th=[ 50], | 70.00th=[ 57], 80.00th=[ 67], 90.00th=[ 87], 95.00th=[ 122], | 99.00th=[ 176], 99.50th=[ 222], 99.90th=[ 226], 99.95th=[ 226], | 99.99th=[ 226] bw ( KiB/s): min= 31, max= 286, per=28.57%, avg=90.86, stdev=53.53, samples=136 iops : min= 1, max= 17, avg= 4.84, stdev= 3.40, samples=136 write: IOPS=5, BW=83.2KiB/s (85.2kB/s)(6032KiB/72462msec); 0 zone resets clat (msec): min=45, max=340, avg=138.92, stdev=45.28 lat (msec): min=45, max=340, avg=138.93, stdev=45.28 clat percentiles (msec): | 1.00th=[ 62], 5.00th=[ 77], 10.00th=[ 85], 20.00th=[ 102], | 30.00th=[ 113], 40.00th=[ 121], 50.00th=[ 133], 60.00th=[ 144], | 70.00th=[ 159], 80.00th=[ 176], 90.00th=[ 201], 95.00th=[ 222], | 99.00th=[ 257], 99.50th=[ 309], 99.90th=[ 342], 99.95th=[ 342], | 99.99th=[ 342] bw ( KiB/s): min= 31, max= 159, per=25.32%, avg=84.81, stdev=29.54, samples=139 iops : min= 1, max= 9, avg= 4.45, stdev= 1.89, samples=139 lat (msec) : 20=3.52%, 50=27.60%, 100=25.26%, 250=43.10%, 500=0.52% cpu : usr=0.05%, sys=4.49%, ctx=1977, 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=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=146487: Fri Apr 24 13:29:26 2026 read: IOPS=5, BW=82.3KiB/s (84.3kB/s)(6032KiB/73311msec) clat (msec): min=11, max=192, avg=48.70, stdev=28.62 lat (msec): min=11, max=192, avg=48.70, stdev=28.62 clat percentiles (msec): | 1.00th=[ 16], 5.00th=[ 19], 10.00th=[ 23], 20.00th=[ 28], | 30.00th=[ 32], 40.00th=[ 36], 50.00th=[ 41], 60.00th=[ 48], | 70.00th=[ 55], 80.00th=[ 64], 90.00th=[ 84], 95.00th=[ 111], | 99.00th=[ 163], 99.50th=[ 186], 99.90th=[ 192], 99.95th=[ 192], | 99.99th=[ 192] bw ( KiB/s): min= 31, max= 255, per=29.22%, avg=92.91, stdev=50.26, samples=127 iops : min= 1, max= 15, avg= 4.95, stdev= 3.18, samples=127 write: IOPS=5, BW=85.3KiB/s (87.4kB/s)(6256KiB/73311msec); 0 zone resets clat (msec): min=58, max=335, avg=140.24, stdev=47.42 lat (msec): min=58, max=335, avg=140.26, stdev=47.43 clat percentiles (msec): | 1.00th=[ 62], 5.00th=[ 80], 10.00th=[ 86], 20.00th=[ 100], | 30.00th=[ 111], 40.00th=[ 123], 50.00th=[ 134], 60.00th=[ 144], | 70.00th=[ 161], 80.00th=[ 176], 90.00th=[ 201], 95.00th=[ 234], | 99.00th=[ 292], 99.50th=[ 300], 99.90th=[ 334], 99.95th=[ 334], | 99.99th=[ 334] bw ( KiB/s): min= 31, max= 160, per=25.47%, avg=85.34, stdev=30.20, samples=144 iops : min= 1, max= 10, avg= 4.49, stdev= 1.95, samples=144 lat (msec) : 20=3.52%, 50=27.73%, 100=25.39%, 250=41.41%, 500=1.95% cpu : usr=0.05%, sys=4.45%, ctx=2047, 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=318KiB/s (326kB/s), 76.4KiB/s-86.3KiB/s (78.2kB/s-88.4kB/s), io=23.4MiB (24.5MB), run=72462-75219msec WRITE: bw=335KiB/s (343kB/s), 83.2KiB/s-86.0KiB/s (85.2kB/s-89.1kB/s), io=24.6MiB (25.8MB), run=72462-75219msec 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=146505: Fri Apr 24 13:29:53 2026 read: IOPS=0, BW=617KiB/s (632kB/s)(7168KiB/11615msec) clat (usec): min=1470, max=5054.2k, avg=1317696.83, stdev=1937204.49 lat (usec): min=1472, max=5054.2k, avg=1317698.99, stdev=1937204.22 clat percentiles (usec): | 1.00th=[ 1467], 5.00th=[ 1467], 10.00th=[ 1467], | 20.00th=[ 168821], 30.00th=[ 287310], 40.00th=[ 287310], | 50.00th=[ 350225], 60.00th=[ 413139], 70.00th=[ 413139], | 80.00th=[2969568], 90.00th=[5066720], 95.00th=[5066720], | 99.00th=[5066720], 99.50th=[5066720], 99.90th=[5066720], | 99.95th=[5066720], 99.99th=[5066720] bw ( KiB/s): min= 2031, max= 4079, per=100.00%, avg=3048.00, stdev=1167.53, samples=4 iops : min= 1, max= 3, avg= 2.00, stdev= 1.15, samples=4 write: IOPS=0, BW=441KiB/s (451kB/s)(5120KiB/11615msec); 0 zone resets clat (msec): min=193, max=833, avg=471.21, stdev=241.41 lat (msec): min=193, max=833, avg=471.29, stdev=241.41 clat percentiles (msec): | 1.00th=[ 194], 5.00th=[ 194], 10.00th=[ 194], 20.00th=[ 194], | 30.00th=[ 326], 40.00th=[ 326], 50.00th=[ 485], 60.00th=[ 485], | 70.00th=[ 523], 80.00th=[ 523], 90.00th=[ 835], 95.00th=[ 835], | 99.00th=[ 835], 99.50th=[ 835], 99.90th=[ 835], 99.95th=[ 835], | 99.99th=[ 835] bw ( KiB/s): min= 2007, max= 4079, per=100.00%, avg=2711.33, stdev=1184.61, samples=3 iops : min= 1, max= 3, avg= 2.00, stdev= 1.00, samples=3 lat (msec) : 2=8.33%, 250=16.67%, 500=41.67%, 750=8.33%, 1000=8.33% lat (msec) : >=2000=16.67% cpu : usr=0.00%, sys=18.80%, ctx=1267, 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=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=146506: Fri Apr 24 13:29:53 2026 read: IOPS=0, BW=190KiB/s (194kB/s)(2048KiB/10786msec) clat (msec): min=282, max=1061, avg=672.16, stdev=551.15 lat (msec): min=282, max=1061, avg=672.16, stdev=551.15 clat percentiles (msec): | 1.00th=[ 284], 5.00th=[ 284], 10.00th=[ 284], 20.00th=[ 284], | 30.00th=[ 284], 40.00th=[ 284], 50.00th=[ 284], 60.00th=[ 1062], | 70.00th=[ 1062], 80.00th=[ 1062], 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= 2035, max= 2035, per=100.00%, avg=2035.00, stdev= 0.00, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=0, BW=949KiB/s (972kB/s)(10.0MiB/10786msec); 0 zone resets clat (msec): min=201, max=3393, avg=939.77, stdev=1118.62 lat (msec): min=201, max=3393, avg=940.02, stdev=1118.87 clat percentiles (msec): | 1.00th=[ 203], 5.00th=[ 203], 10.00th=[ 203], 20.00th=[ 215], | 30.00th=[ 236], 40.00th=[ 271], 50.00th=[ 321], 60.00th=[ 659], | 70.00th=[ 676], 80.00th=[ 852], 90.00th=[ 2567], 95.00th=[ 3406], | 99.00th=[ 3406], 99.50th=[ 3406], 99.90th=[ 3406], 99.95th=[ 3406], | 99.99th=[ 3406] bw ( KiB/s): min= 1910, max= 4063, per=100.00%, avg=2579.86, stdev=974.87, samples=7 iops : min= 1, max= 3, avg= 1.57, stdev= 0.98, samples=7 lat (msec) : 250=25.00%, 500=25.00%, 750=16.67%, 1000=8.33%, 2000=8.33% lat (msec) : >=2000=16.67% cpu : usr=0.03%, sys=21.80%, ctx=340, 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=146508: Fri Apr 24 13:29:53 2026 read: IOPS=0, BW=638KiB/s (653kB/s)(6144KiB/9628msec) clat (usec): min=674, max=630986, avg=207998.65, stdev=262700.36 lat (usec): min=677, max=630987, avg=208002.24, stdev=262701.45 clat percentiles (usec): | 1.00th=[ 676], 5.00th=[ 676], 10.00th=[ 676], 20.00th=[ 766], | 30.00th=[ 766], 40.00th=[ 1516], 50.00th=[ 1516], 60.00th=[212861], | 70.00th=[400557], 80.00th=[400557], 90.00th=[633340], 95.00th=[633340], | 99.00th=[633340], 99.50th=[633340], 99.90th=[633340], 99.95th=[633340], | 99.99th=[633340] bw ( KiB/s): min= 2019, max= 4087, per=100.00%, avg=2544.00, stdev=1028.70, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 write: IOPS=0, BW=638KiB/s (653kB/s)(6144KiB/9628msec); 0 zone resets clat (msec): min=301, max=3271, avg=1387.18, stdev=1208.49 lat (msec): min=301, max=3271, avg=1387.29, stdev=1208.49 clat percentiles (msec): | 1.00th=[ 300], 5.00th=[ 300], 10.00th=[ 300], 20.00th=[ 388], | 30.00th=[ 388], 40.00th=[ 642], 50.00th=[ 642], 60.00th=[ 1318], | 70.00th=[ 2400], 80.00th=[ 2400], 90.00th=[ 3272], 95.00th=[ 3272], | 99.00th=[ 3272], 99.50th=[ 3272], 99.90th=[ 3272], 99.95th=[ 3272], | 99.99th=[ 3272] bw ( KiB/s): min= 1973, max= 4087, per=100.00%, avg=2529.50, stdev=1038.70, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 lat (usec) : 750=8.33%, 1000=8.33% lat (msec) : 2=8.33%, 250=8.33%, 500=25.00%, 750=16.67%, 2000=8.33% lat (msec) : >=2000=16.67% cpu : usr=0.00%, sys=18.47%, ctx=488, 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=146509: Fri Apr 24 13:29:53 2026 read: IOPS=0, BW=472KiB/s (484kB/s)(5120KiB/10836msec) clat (usec): min=832, max=708539, avg=266522.20, stdev=291642.50 lat (usec): min=834, max=708540, avg=266524.57, stdev=291642.10 clat percentiles (usec): | 1.00th=[ 832], 5.00th=[ 832], 10.00th=[ 832], 20.00th=[ 832], | 30.00th=[ 1663], 40.00th=[ 1663], 50.00th=[299893], 60.00th=[299893], | 70.00th=[320865], 80.00th=[320865], 90.00th=[708838], 95.00th=[708838], | 99.00th=[708838], 99.50th=[708838], 99.90th=[708838], 99.95th=[708838], | 99.99th=[708838] bw ( KiB/s): min= 4063, max= 4071, per=100.00%, avg=4067.00, stdev= 5.66, samples=2 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=2 write: IOPS=0, BW=661KiB/s (677kB/s)(7168KiB/10836msec); 0 zone resets clat (msec): min=441, max=3073, avg=1354.34, stdev=971.76 lat (msec): min=441, max=3073, avg=1354.43, stdev=971.75 clat percentiles (msec): | 1.00th=[ 443], 5.00th=[ 443], 10.00th=[ 443], 20.00th=[ 510], | 30.00th=[ 818], 40.00th=[ 818], 50.00th=[ 1011], 60.00th=[ 1401], | 70.00th=[ 1401], 80.00th=[ 2232], 90.00th=[ 3071], 95.00th=[ 3071], | 99.00th=[ 3071], 99.50th=[ 3071], 99.90th=[ 3071], 99.95th=[ 3071], | 99.99th=[ 3071] bw ( KiB/s): min= 1910, max= 2043, per=81.66%, avg=2015.43, stdev=48.11, samples=7 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=7 lat (usec) : 1000=8.33% lat (msec) : 2=8.33%, 500=25.00%, 750=16.67%, 1000=8.33%, 2000=16.67% lat (msec) : >=2000=16.67% cpu : usr=0.00%, sys=15.95%, ctx=222, 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=1763KiB/s (1806kB/s), 190KiB/s-638KiB/s (194kB/s-653kB/s), io=20.0MiB (20.0MB), run=9628-11615msec WRITE: bw=2469KiB/s (2528kB/s), 441KiB/s-949KiB/s (451kB/s-972kB/s), io=28.0MiB (29.4MB), run=9628-11615msec rand-rw: (groupid=0, jobs=1): err= 0: pid=146510: Fri Apr 24 13:29:54 2026 read: IOPS=0, BW=609KiB/s (624kB/s)(7168KiB/11765msec) clat (msec): min=112, max=3282, avg=1223.34, stdev=1411.75 lat (msec): min=112, max=3282, avg=1223.34, stdev=1411.75 clat percentiles (msec): | 1.00th=[ 113], 5.00th=[ 113], 10.00th=[ 113], 20.00th=[ 121], | 30.00th=[ 131], 40.00th=[ 131], 50.00th=[ 176], 60.00th=[ 1955], | 70.00th=[ 1955], 80.00th=[ 2769], 90.00th=[ 3272], 95.00th=[ 3272], | 99.00th=[ 3272], 99.50th=[ 3272], 99.90th=[ 3272], 99.95th=[ 3272], | 99.99th=[ 3272] bw ( KiB/s): min= 1965, max= 4087, per=100.00%, avg=2535.75, stdev=1034.86, samples=4 iops : min= 1, max= 3, avg= 1.75, stdev= 0.96, samples=4 write: IOPS=0, BW=435KiB/s (446kB/s)(5120KiB/11765msec); 0 zone resets clat (msec): min=287, max=981, avg=628.96, stdev=266.82 lat (msec): min=287, max=981, avg=629.05, stdev=266.81 clat percentiles (msec): | 1.00th=[ 288], 5.00th=[ 288], 10.00th=[ 288], 20.00th=[ 288], | 30.00th=[ 523], 40.00th=[ 523], 50.00th=[ 558], 60.00th=[ 558], | 70.00th=[ 793], 80.00th=[ 793], 90.00th=[ 978], 95.00th=[ 978], | 99.00th=[ 978], 99.50th=[ 978], 99.90th=[ 978], 99.95th=[ 978], | 99.99th=[ 978] bw ( KiB/s): min= 1835, max= 2048, per=81.54%, avg=1987.25, stdev=101.76, samples=4 iops : min= 1, max= 2, avg= 1.25, stdev= 0.50, samples=4 lat (msec) : 250=33.33%, 500=8.33%, 750=16.67%, 1000=16.67%, 2000=8.33% lat (msec) : >=2000=16.67% cpu : usr=0.00%, sys=5.47%, ctx=117, 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=146511: Fri Apr 24 13:29:54 2026 read: IOPS=0, BW=185KiB/s (189kB/s)(2048KiB/11079msec) clat (msec): min=135, max=928, avg=532.02, stdev=560.28 lat (msec): min=135, max=928, avg=532.02, stdev=560.28 clat percentiles (msec): | 1.00th=[ 136], 5.00th=[ 136], 10.00th=[ 136], 20.00th=[ 136], | 30.00th=[ 136], 40.00th=[ 136], 50.00th=[ 136], 60.00th=[ 927], | 70.00th=[ 927], 80.00th=[ 927], 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= 2043, max= 2048, per=100.00%, avg=2045.50, stdev= 3.54, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 write: IOPS=0, BW=924KiB/s (946kB/s)(10.0MiB/11079msec); 0 zone resets clat (msec): min=181, max=3755, avg=999.26, stdev=1298.86 lat (msec): min=181, max=3755, avg=999.35, stdev=1298.85 clat percentiles (msec): | 1.00th=[ 182], 5.00th=[ 182], 10.00th=[ 182], 20.00th=[ 192], | 30.00th=[ 309], 40.00th=[ 309], 50.00th=[ 321], 60.00th=[ 330], | 70.00th=[ 550], 80.00th=[ 1011], 90.00th=[ 3037], 95.00th=[ 3742], | 99.00th=[ 3742], 99.50th=[ 3742], 99.90th=[ 3742], 99.95th=[ 3742], | 99.99th=[ 3742] bw ( KiB/s): min= 1965, max= 4096, per=100.00%, avg=2570.57, stdev=940.51, samples=7 iops : min= 1, max= 4, avg= 1.71, stdev= 1.25, samples=7 lat (msec) : 250=25.00%, 500=33.33%, 750=8.33%, 1000=8.33%, 2000=8.33% lat (msec) : >=2000=16.67% cpu : usr=0.00%, sys=6.84%, ctx=111, 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=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=146512: Fri Apr 24 13:29:54 2026 read: IOPS=0, BW=572KiB/s (585kB/s)(6144KiB/10746msec) clat (msec): min=156, max=783, avg=308.09, stdev=248.33 lat (msec): min=156, max=783, avg=308.09, stdev=248.33 clat percentiles (msec): | 1.00th=[ 157], 5.00th=[ 157], 10.00th=[ 157], 20.00th=[ 163], | 30.00th=[ 163], 40.00th=[ 176], 50.00th=[ 176], 60.00th=[ 188], | 70.00th=[ 384], 80.00th=[ 384], 90.00th=[ 785], 95.00th=[ 785], | 99.00th=[ 785], 99.50th=[ 785], 99.90th=[ 785], 99.95th=[ 785], | 99.99th=[ 785] bw ( KiB/s): min= 1835, max= 3785, per=100.00%, avg=2406.00, stdev=923.19, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 write: IOPS=0, BW=572KiB/s (585kB/s)(6144KiB/10746msec); 0 zone resets clat (msec): min=209, max=3184, avg=1475.79, stdev=1244.65 lat (msec): min=209, max=3184, avg=1475.91, stdev=1244.62 clat percentiles (msec): | 1.00th=[ 209], 5.00th=[ 209], 10.00th=[ 209], 20.00th=[ 338], | 30.00th=[ 338], 40.00th=[ 768], 50.00th=[ 768], 60.00th=[ 1720], | 70.00th=[ 2635], 80.00th=[ 2635], 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= 1957, max= 4087, per=100.00%, avg=2531.50, stdev=1037.76, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 lat (msec) : 250=41.67%, 500=16.67%, 1000=16.67%, 2000=8.33%, >=2000=16.67% cpu : usr=0.00%, sys=5.74%, ctx=160, 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=146513: Fri Apr 24 13:29:54 2026 read: IOPS=0, BW=444KiB/s (454kB/s)(5120KiB/11536msec) clat (msec): min=95, max=469, avg=183.55, stdev=160.44 lat (msec): min=95, max=469, avg=183.55, stdev=160.44 clat percentiles (msec): | 1.00th=[ 95], 5.00th=[ 95], 10.00th=[ 95], 20.00th=[ 95], | 30.00th=[ 102], 40.00th=[ 102], 50.00th=[ 115], 60.00th=[ 115], | 70.00th=[ 138], 80.00th=[ 138], 90.00th=[ 468], 95.00th=[ 468], | 99.00th=[ 468], 99.50th=[ 468], 99.90th=[ 468], 99.95th=[ 468], | 99.99th=[ 468] bw ( KiB/s): min= 3785, max= 4087, per=100.00%, avg=3936.00, stdev=213.55, samples=2 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=2 write: IOPS=0, BW=621KiB/s (636kB/s)(7168KiB/11536msec); 0 zone resets clat (msec): min=450, max=3848, avg=1511.45, stdev=1290.35 lat (msec): min=451, max=3848, avg=1511.55, stdev=1290.33 clat percentiles (msec): | 1.00th=[ 451], 5.00th=[ 451], 10.00th=[ 451], 20.00th=[ 531], | 30.00th=[ 600], 40.00th=[ 600], 50.00th=[ 802], 60.00th=[ 1838], | 70.00th=[ 1838], 80.00th=[ 2500], 90.00th=[ 3842], 95.00th=[ 3842], | 99.00th=[ 3842], 99.50th=[ 3842], 99.90th=[ 3842], 99.95th=[ 3842], | 99.99th=[ 3842] bw ( KiB/s): min= 1892, max= 2048, per=82.14%, avg=2001.67, stdev=63.45, samples=6 iops : min= 1, max= 2, avg= 1.17, stdev= 0.41, samples=6 lat (msec) : 100=8.33%, 250=25.00%, 500=16.67%, 750=16.67%, 1000=8.33% lat (msec) : 2000=8.33%, >=2000=16.67% cpu : usr=0.00%, sys=8.21%, ctx=169, 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=1741KiB/s (1783kB/s), 185KiB/s-609KiB/s (189kB/s-624kB/s), io=20.0MiB (20.0MB), run=10746-11765msec WRITE: bw=2437KiB/s (2496kB/s), 435KiB/s-924KiB/s (446kB/s-946kB/s), io=28.0MiB (29.4MB), run=10746-11765msec 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=146526: Fri Apr 24 13:30:15 2026 read: IOPS=0, BW=2614KiB/s (2677kB/s)(12.0MiB/4701msec) clat (msec): min=1012, max=2472, avg=1550.47, stdev=802.28 lat (msec): min=1012, max=2472, avg=1550.48, stdev=802.28 clat percentiles (msec): | 1.00th=[ 1011], 5.00th=[ 1011], 10.00th=[ 1011], 20.00th=[ 1011], | 30.00th=[ 1011], 40.00th=[ 1167], 50.00th=[ 1167], 60.00th=[ 1167], | 70.00th=[ 2467], 80.00th=[ 2467], 90.00th=[ 2467], 95.00th=[ 2467], | 99.00th=[ 2467], 99.50th=[ 2467], 99.90th=[ 2467], 99.95th=[ 2467], | 99.99th=[ 2467] bw ( KiB/s): min= 7892, max= 8175, per=100.00%, avg=8033.50, stdev=200.11, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 2000=66.67%, >=2000=33.33% cpu : usr=0.00%, sys=40.51%, ctx=1474, 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=146527: Fri Apr 24 13:30:15 2026 read: IOPS=0, BW=749KiB/s (767kB/s)(4096KiB/5467msec) clat (nsec): min=1110.4M, max=1110.4M, avg=1110432547.00, stdev= 0.00 lat (nsec): min=1110.4M, max=1110.4M, avg=1110436799.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1116], 5.00th=[ 1116], 10.00th=[ 1116], 20.00th=[ 1116], | 30.00th=[ 1116], 40.00th=[ 1116], 50.00th=[ 1116], 60.00th=[ 1116], | 70.00th=[ 1116], 80.00th=[ 1116], 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= 7892, max= 7892, per=100.00%, avg=7892.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=1498KiB/s (1534kB/s)(8192KiB/5467msec); 0 zone resets clat (msec): min=1327, max=2937, avg=2132.42, stdev=1138.85 lat (msec): min=1327, max=2938, avg=2132.86, stdev=1138.82 clat percentiles (msec): | 1.00th=[ 1334], 5.00th=[ 1334], 10.00th=[ 1334], 20.00th=[ 1334], | 30.00th=[ 1334], 40.00th=[ 1334], 50.00th=[ 1334], 60.00th=[ 2937], | 70.00th=[ 2937], 80.00th=[ 2937], 90.00th=[ 2937], 95.00th=[ 2937], | 99.00th=[ 2937], 99.50th=[ 2937], 99.90th=[ 2937], 99.95th=[ 2937], | 99.99th=[ 2937] bw ( KiB/s): min= 8175, max= 8175, per=100.00%, avg=8175.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 2000=66.67%, >=2000=33.33% cpu : usr=0.00%, sys=9.28%, ctx=577, 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=146528: Fri Apr 24 13:30:15 2026 write: IOPS=0, BW=2284KiB/s (2338kB/s)(12.0MiB/5381msec); 0 zone resets clat (msec): min=293, max=3006, avg=1766.70, stdev=1371.23 lat (msec): min=294, max=3006, avg=1767.15, stdev=1371.00 clat percentiles (msec): | 1.00th=[ 296], 5.00th=[ 296], 10.00th=[ 296], 20.00th=[ 296], | 30.00th=[ 296], 40.00th=[ 2005], 50.00th=[ 2005], 60.00th=[ 2005], | 70.00th=[ 3004], 80.00th=[ 3004], 90.00th=[ 3004], 95.00th=[ 3004], | 99.00th=[ 3004], 99.50th=[ 3004], 99.90th=[ 3004], 99.95th=[ 3004], | 99.99th=[ 3004] bw ( KiB/s): min= 8175, max= 8175, per=100.00%, avg=8175.00, 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=0.06%, sys=9.57%, ctx=77, 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=146529: Fri Apr 24 13:30:15 2026 write: IOPS=0, BW=2682KiB/s (2747kB/s)(12.0MiB/4581msec); 0 zone resets clat (msec): min=790, max=2447, avg=1513.47, stdev=848.23 lat (msec): min=790, max=2447, avg=1514.05, stdev=848.14 clat percentiles (msec): | 1.00th=[ 793], 5.00th=[ 793], 10.00th=[ 793], 20.00th=[ 793], | 30.00th=[ 793], 40.00th=[ 1301], 50.00th=[ 1301], 60.00th=[ 1301], | 70.00th=[ 2433], 80.00th=[ 2433], 90.00th=[ 2433], 95.00th=[ 2433], | 99.00th=[ 2433], 99.50th=[ 2433], 99.90th=[ 2433], 99.95th=[ 2433], | 99.99th=[ 2433] bw ( KiB/s): min= 7892, max= 8175, per=100.00%, avg=8033.50, stdev=200.11, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 1000=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=13.80%, ctx=122, 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=2997KiB/s (3069kB/s), 749KiB/s-2614KiB/s (767kB/s-2677kB/s), io=16.0MiB (16.8MB), run=4701-5467msec WRITE: bw=5994KiB/s (6138kB/s), 1498KiB/s-2682KiB/s (1534kB/s-2747kB/s), io=32.0MiB (33.6MB), run=4581-5467msec rand-rw: (groupid=0, jobs=1): err= 0: pid=146522: Fri Apr 24 13:30:16 2026 read: IOPS=0, BW=2471KiB/s (2531kB/s)(12.0MiB/4972msec) clat (msec): min=506, max=2749, avg=1639.45, stdev=1121.58 lat (msec): min=506, max=2749, avg=1639.46, stdev=1121.58 clat percentiles (msec): | 1.00th=[ 506], 5.00th=[ 506], 10.00th=[ 506], 20.00th=[ 506], | 30.00th=[ 506], 40.00th=[ 1670], 50.00th=[ 1670], 60.00th=[ 1670], | 70.00th=[ 2735], 80.00th=[ 2735], 90.00th=[ 2735], 95.00th=[ 2735], | 99.00th=[ 2735], 99.50th=[ 2735], 99.90th=[ 2735], 99.95th=[ 2735], | 99.99th=[ 2735] bw ( KiB/s): min= 8175, max= 8192, per=100.00%, avg=8183.50, stdev=12.02, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 750=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=8.69%, 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=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=146523: Fri Apr 24 13:30:16 2026 read: IOPS=0, BW=813KiB/s (832kB/s)(4096KiB/5040msec) clat (nsec): min=408751k, max=408751k, avg=408751185.00, stdev= 0.00 lat (nsec): min=408755k, max=408755k, avg=408754980.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 409], 5.00th=[ 409], 10.00th=[ 409], 20.00th=[ 409], | 30.00th=[ 409], 40.00th=[ 409], 50.00th=[ 409], 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= 7406, max= 7406, per=100.00%, avg=7406.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=1625KiB/s (1664kB/s)(8192KiB/5040msec); 0 zone resets clat (msec): min=1711, max=2900, avg=2305.65, stdev=840.72 lat (msec): min=1711, max=2900, avg=2306.39, stdev=840.70 clat percentiles (msec): | 1.00th=[ 1703], 5.00th=[ 1703], 10.00th=[ 1703], 20.00th=[ 1703], | 30.00th=[ 1703], 40.00th=[ 1703], 50.00th=[ 1703], 60.00th=[ 2903], | 70.00th=[ 2903], 80.00th=[ 2903], 90.00th=[ 2903], 95.00th=[ 2903], | 99.00th=[ 2903], 99.50th=[ 2903], 99.90th=[ 2903], 99.95th=[ 2903], | 99.99th=[ 2903] bw ( KiB/s): min= 8175, max= 8175, per=100.00%, avg=8175.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=10.04%, ctx=144, 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=146524: Fri Apr 24 13:30:16 2026 write: IOPS=0, BW=2029KiB/s (2078kB/s)(12.0MiB/6056msec); 0 zone resets clat (msec): min=286, max=2940, avg=2005.91, stdev=1490.80 lat (msec): min=287, max=2941, avg=2006.39, stdev=1490.78 clat percentiles (msec): | 1.00th=[ 288], 5.00th=[ 288], 10.00th=[ 288], 20.00th=[ 288], | 30.00th=[ 288], 40.00th=[ 2802], 50.00th=[ 2802], 60.00th=[ 2802], | 70.00th=[ 2937], 80.00th=[ 2937], 90.00th=[ 2937], 95.00th=[ 2937], | 99.00th=[ 2937], 99.50th=[ 2937], 99.90th=[ 2937], 99.95th=[ 2937], | 99.99th=[ 2937] bw ( KiB/s): min= 8110, max= 8192, per=100.00%, avg=8151.00, stdev=57.98, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 500=33.33%, >=2000=66.67% cpu : usr=0.03%, sys=8.75%, ctx=75, 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=146525: Fri Apr 24 13:30:16 2026 write: IOPS=1, BW=4616KiB/s (4727kB/s)(12.0MiB/2662msec); 0 zone resets clat (msec): min=398, max=1739, avg=875.67, stdev=749.69 lat (msec): min=399, max=1740, avg=876.21, stdev=749.74 clat percentiles (msec): | 1.00th=[ 401], 5.00th=[ 401], 10.00th=[ 401], 20.00th=[ 401], | 30.00th=[ 401], 40.00th=[ 489], 50.00th=[ 489], 60.00th=[ 489], | 70.00th=[ 1737], 80.00th=[ 1737], 90.00th=[ 1737], 95.00th=[ 1737], | 99.00th=[ 1737], 99.50th=[ 1737], 99.90th=[ 1737], 99.95th=[ 1737], | 99.99th=[ 1737] bw ( KiB/s): min=16384, max=16384, per=100.00%, avg=16384.00, stdev= 0.00, samples=1 iops : min= 4, max= 4, avg= 4.00, stdev= 0.00, samples=1 lat (msec) : 500=66.67%, 2000=33.33% cpu : usr=0.00%, sys=22.44%, ctx=126, 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=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=3251KiB/s (3329kB/s), 813KiB/s-2471KiB/s (832kB/s-2531kB/s), io=16.0MiB (16.8MB), run=4972-5040msec WRITE: bw=5411KiB/s (5541kB/s), 1625KiB/s-4616KiB/s (1664kB/s-4727kB/s), io=32.0MiB (33.6MB), run=2662-6056msec