== sanity test 398b: DIO and buffer IO race ============== 07:56:37 (1790682997) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 6.24299 s, 8.1 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=145451: Tue Sep 29 07:59:08 2026 read: IOPS=11, BW=46.1KiB/s (47.2kB/s)(5992KiB/129911msec) clat (usec): min=35, max=1152.2k, avg=41969.84, stdev=41554.74 lat (usec): min=35, max=1152.2k, avg=41971.49, stdev=41554.75 clat percentiles (usec): | 1.00th=[ 51], 5.00th=[ 66], 10.00th=[ 196], | 20.00th=[ 19792], 30.00th=[ 25297], 40.00th=[ 30016], | 50.00th=[ 35390], 60.00th=[ 42730], 70.00th=[ 50594], | 80.00th=[ 60556], 90.00th=[ 79168], 95.00th=[ 98042], | 99.00th=[ 137364], 99.50th=[ 164627], 99.90th=[ 278922], | 99.95th=[1149240], 99.99th=[1149240] bw ( KiB/s): min= 7, max= 95, per=25.24%, avg=46.44, stdev=19.72, samples=252 iops : min= 1, max= 23, avg=10.98, stdev= 4.95, samples=252 write: IOPS=12, BW=48.5KiB/s (49.6kB/s)(6296KiB/129911msec); 0 zone resets clat (usec): min=882, max=418953, avg=42242.31, stdev=43968.92 lat (usec): min=883, max=418953, avg=42258.16, stdev=43959.24 clat percentiles (usec): | 1.00th=[ 1106], 5.00th=[ 1303], 10.00th=[ 1614], 20.00th=[ 4359], | 30.00th=[ 9634], 40.00th=[ 19792], 50.00th=[ 31065], 60.00th=[ 42206], | 70.00th=[ 54789], 80.00th=[ 70779], 90.00th=[101188], 95.00th=[130548], | 99.00th=[181404], 99.50th=[223347], 99.90th=[320865], 99.95th=[417334], | 99.99th=[417334] bw ( KiB/s): min= 7, max= 108, per=25.20%, avg=48.38, stdev=19.64, samples=254 iops : min= 1, max= 27, avg=11.46, stdev= 4.91, samples=254 lat (usec) : 50=0.42%, 100=4.23%, 250=0.23%, 500=0.26%, 750=0.07% lat (usec) : 1000=0.23% lat (msec) : 2=6.15%, 4=3.39%, 10=6.18%, 20=9.38%, 50=37.08% lat (msec) : 100=24.80%, 250=7.39%, 500=0.16%, 2000=0.03% cpu : usr=0.10%, sys=5.42%, ctx=6607, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1498,1574,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145453: Tue Sep 29 07:59:08 2026 read: IOPS=11, BW=45.6KiB/s (46.7kB/s)(5940KiB/130376msec) clat (usec): min=30, max=246089, avg=41950.52, stdev=32356.14 lat (usec): min=31, max=246091, avg=41955.73, stdev=32355.98 clat percentiles (usec): | 1.00th=[ 50], 5.00th=[ 66], 10.00th=[ 106], 20.00th=[ 19530], | 30.00th=[ 24773], 40.00th=[ 30540], 50.00th=[ 35390], 60.00th=[ 41681], | 70.00th=[ 49546], 80.00th=[ 61604], 90.00th=[ 80217], 95.00th=[ 99091], | 99.00th=[160433], 99.50th=[173016], 99.90th=[229639], 99.95th=[246416], | 99.99th=[246416] bw ( KiB/s): min= 5, max= 103, per=24.99%, avg=45.98, stdev=19.49, samples=252 iops : min= 1, max= 25, avg=10.87, stdev= 4.88, samples=252 write: IOPS=12, BW=48.7KiB/s (49.9kB/s)(6348KiB/130376msec); 0 zone resets clat (usec): min=792, max=1158.3k, avg=42528.64, stdev=51312.79 lat (usec): min=855, max=1158.3k, avg=42536.99, stdev=51309.24 clat percentiles (usec): | 1.00th=[ 1090], 5.00th=[ 1319], 10.00th=[ 1778], | 20.00th=[ 4228], 30.00th=[ 9110], 40.00th=[ 19792], | 50.00th=[ 31589], 60.00th=[ 42730], 70.00th=[ 55313], | 80.00th=[ 70779], 90.00th=[ 98042], 95.00th=[ 126354], | 99.00th=[ 183501], 99.50th=[ 229639], 99.90th=[ 367002], | 99.95th=[1166017], 99.99th=[1166017] bw ( KiB/s): min= 7, max= 135, per=25.32%, avg=48.62, stdev=22.03, samples=255 iops : min= 1, max= 33, avg=11.52, stdev= 5.52, samples=255 lat (usec) : 50=0.55%, 100=4.13%, 250=0.49%, 500=0.10%, 750=0.10% lat (usec) : 1000=0.36% lat (msec) : 2=5.47%, 4=4.33%, 10=6.51%, 20=8.63%, 50=37.53% lat (msec) : 100=24.71%, 250=6.93%, 500=0.13%, 2000=0.03% cpu : usr=0.10%, sys=5.49%, ctx=6478, 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=145456: Tue Sep 29 07:59:08 2026 read: IOPS=11, BW=47.4KiB/s (48.6kB/s)(6028KiB/127066msec) clat (usec): min=32, max=259633, avg=40223.56, stdev=30791.91 lat (usec): min=33, max=259634, avg=40234.88, stdev=30789.00 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 67], 10.00th=[ 130], 20.00th=[ 18744], | 30.00th=[ 23987], 40.00th=[ 29230], 50.00th=[ 34341], 60.00th=[ 40109], | 70.00th=[ 49021], 80.00th=[ 60556], 90.00th=[ 78119], 95.00th=[ 92799], | 99.00th=[145753], 99.50th=[189793], 99.90th=[252707], 99.95th=[258999], | 99.99th=[258999] bw ( KiB/s): min= 7, max= 103, per=26.16%, avg=48.14, stdev=20.19, samples=244 iops : min= 1, max= 25, avg=11.40, stdev= 5.08, samples=244 write: IOPS=12, BW=49.3KiB/s (50.4kB/s)(6260KiB/127066msec); 0 zone resets clat (usec): min=745, max=1230.6k, avg=42071.72, stdev=51201.85 lat (usec): min=746, max=1230.6k, avg=42076.69, stdev=51200.29 clat percentiles (usec): | 1.00th=[ 1106], 5.00th=[ 1319], 10.00th=[ 1745], | 20.00th=[ 4490], 30.00th=[ 8848], 40.00th=[ 18482], | 50.00th=[ 33162], 60.00th=[ 42206], 70.00th=[ 56361], | 80.00th=[ 69731], 90.00th=[ 95945], 95.00th=[ 122160], | 99.00th=[ 185598], 99.50th=[ 210764], 99.90th=[ 320865], | 99.95th=[1233126], 99.99th=[1233126] bw ( KiB/s): min= 7, max= 119, per=25.83%, avg=49.60, stdev=19.30, samples=246 iops : min= 1, max= 29, avg=11.77, stdev= 4.86, samples=246 lat (usec) : 50=0.42%, 100=4.07%, 250=0.65%, 500=0.07%, 750=0.16% lat (usec) : 1000=0.13% lat (msec) : 2=5.99%, 4=3.55%, 10=6.97%, 20=9.77%, 50=36.95% lat (msec) : 100=25.00%, 250=6.09%, 500=0.16%, 2000=0.03% cpu : usr=0.09%, sys=5.43%, ctx=6545, 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=145457: Tue Sep 29 07:59:08 2026 read: IOPS=11, BW=47.1KiB/s (48.2kB/s)(6052KiB/128611msec) clat (usec): min=32, max=328191, avg=40610.30, stdev=31549.16 lat (usec): min=32, max=328194, avg=40614.48, stdev=31552.21 clat percentiles (usec): | 1.00th=[ 49], 5.00th=[ 67], 10.00th=[ 88], 20.00th=[ 17695], | 30.00th=[ 23725], 40.00th=[ 28967], 50.00th=[ 35390], 60.00th=[ 42206], | 70.00th=[ 50594], 80.00th=[ 61080], 90.00th=[ 80217], 95.00th=[ 95945], | 99.00th=[139461], 99.50th=[158335], 99.90th=[320865], 99.95th=[329253], | 99.99th=[329253] bw ( KiB/s): min= 7, max= 111, per=25.79%, avg=47.46, stdev=20.25, samples=248 iops : min= 1, max= 27, avg=11.24, stdev= 5.11, samples=248 write: IOPS=12, BW=48.5KiB/s (49.7kB/s)(6236KiB/128611msec); 0 zone resets clat (usec): min=853, max=1109.7k, avg=42699.47, stdev=50544.86 lat (usec): min=854, max=1109.7k, avg=42708.83, stdev=50541.81 clat percentiles (usec): | 1.00th=[ 1139], 5.00th=[ 1319], 10.00th=[ 1876], | 20.00th=[ 4555], 30.00th=[ 9896], 40.00th=[ 20317], | 50.00th=[ 32900], 60.00th=[ 42730], 70.00th=[ 56361], | 80.00th=[ 71828], 90.00th=[ 98042], 95.00th=[ 124257], | 99.00th=[ 173016], 99.50th=[ 233833], 99.90th=[ 354419], | 99.95th=[1115685], 99.99th=[1115685] bw ( KiB/s): min= 7, max= 125, per=25.23%, avg=48.44, stdev=19.92, samples=250 iops : min= 1, max= 31, avg=11.48, stdev= 5.01, samples=250 lat (usec) : 50=0.59%, 100=4.72%, 250=0.52%, 500=0.10%, 750=0.03% lat (usec) : 1000=0.20% lat (msec) : 2=5.40%, 4=4.04%, 10=6.48%, 20=9.80%, 50=35.42% lat (msec) : 100=25.94%, 250=6.48%, 500=0.26%, 2000=0.03% cpu : usr=0.09%, sys=5.71%, ctx=6580, 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=184KiB/s (189kB/s), 45.6KiB/s-47.4KiB/s (46.7kB/s-48.6kB/s), io=23.4MiB (24.6MB), run=127066-130376msec WRITE: bw=193KiB/s (197kB/s), 48.5KiB/s-49.3KiB/s (49.6kB/s-50.4kB/s), io=24.6MiB (25.7MB), run=127066-130376msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145450: Tue Sep 29 08:01:29 2026 read: IOPS=5, BW=22.3KiB/s (22.8kB/s)(5992KiB/269244msec) clat (msec): min=5, max=1214, avg=36.83, stdev=48.85 lat (msec): min=5, max=1214, avg=36.84, stdev=48.85 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=[ 28], | 70.00th=[ 35], 80.00th=[ 51], 90.00th=[ 85], 95.00th=[ 107], | 99.00th=[ 176], 99.50th=[ 209], 99.90th=[ 542], 99.95th=[ 1217], | 99.99th=[ 1217] bw ( KiB/s): min= 7, max= 88, per=28.08%, avg=24.71, stdev=17.30, samples=468 iops : min= 1, max= 22, avg= 5.53, stdev= 4.37, samples=468 write: IOPS=5, BW=23.4KiB/s (23.9kB/s)(6296KiB/269244msec); 0 zone resets clat (msec): min=35, max=581, avg=135.67, stdev=64.35 lat (msec): min=35, max=581, avg=135.68, stdev=64.35 clat percentiles (msec): | 1.00th=[ 48], 5.00th=[ 62], 10.00th=[ 70], 20.00th=[ 83], | 30.00th=[ 96], 40.00th=[ 107], 50.00th=[ 121], 60.00th=[ 136], | 70.00th=[ 157], 80.00th=[ 182], 90.00th=[ 224], 95.00th=[ 262], | 99.00th=[ 334], 99.50th=[ 376], 99.90th=[ 477], 99.95th=[ 584], | 99.99th=[ 584] bw ( KiB/s): min= 7, max= 56, per=25.15%, avg=23.14, stdev=10.95, samples=523 iops : min= 1, max= 14, avg= 5.14, stdev= 2.80, samples=523 lat (msec) : 10=3.32%, 20=17.58%, 50=18.85%, 100=23.40%, 250=33.50% lat (msec) : 500=3.26%, 750=0.07%, 2000=0.03% cpu : usr=0.06%, sys=1.21%, ctx=5097, 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=145452: Tue Sep 29 08:01:29 2026 read: IOPS=5, BW=21.9KiB/s (22.4kB/s)(5940KiB/271557msec) clat (msec): min=5, max=998, avg=36.59, stdev=45.70 lat (msec): min=5, max=998, avg=36.59, stdev=45.70 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 20], 50.00th=[ 23], 60.00th=[ 28], | 70.00th=[ 35], 80.00th=[ 51], 90.00th=[ 80], 95.00th=[ 109], | 99.00th=[ 197], 99.50th=[ 245], 99.90th=[ 567], 99.95th=[ 995], | 99.99th=[ 995] bw ( KiB/s): min= 7, max= 95, per=28.35%, avg=24.95, stdev=16.63, samples=459 iops : min= 1, max= 23, avg= 5.60, stdev= 4.21, samples=459 write: IOPS=5, BW=23.4KiB/s (23.9kB/s)(6348KiB/271557msec); 0 zone resets clat (msec): min=37, max=462, avg=136.52, stdev=64.78 lat (msec): min=37, max=462, avg=136.52, stdev=64.78 clat percentiles (msec): | 1.00th=[ 46], 5.00th=[ 62], 10.00th=[ 70], 20.00th=[ 84], | 30.00th=[ 94], 40.00th=[ 107], 50.00th=[ 123], 60.00th=[ 138], | 70.00th=[ 155], 80.00th=[ 182], 90.00th=[ 228], 95.00th=[ 271], | 99.00th=[ 334], 99.50th=[ 372], 99.90th=[ 435], 99.95th=[ 464], | 99.99th=[ 464] bw ( KiB/s): min= 7, max= 56, per=25.19%, avg=23.18, stdev=11.11, samples=527 iops : min= 1, max= 14, avg= 5.15, stdev= 2.83, samples=527 lat (msec) : 10=3.45%, 20=16.89%, 50=19.08%, 100=24.02%, 250=32.58% lat (msec) : 500=3.91%, 750=0.03%, 1000=0.03% cpu : usr=0.05%, sys=1.20%, ctx=5187, 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=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=145454: Tue Sep 29 08:01:29 2026 read: IOPS=5, BW=22.2KiB/s (22.8kB/s)(6028KiB/271136msec) clat (msec): min=5, max=550, avg=36.35, stdev=37.50 lat (msec): min=5, max=550, avg=36.36, stdev=37.50 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 24], 60.00th=[ 29], | 70.00th=[ 36], 80.00th=[ 50], 90.00th=[ 80], 95.00th=[ 110], | 99.00th=[ 163], 99.50th=[ 211], 99.90th=[ 372], 99.95th=[ 550], | 99.99th=[ 550] bw ( KiB/s): min= 7, max= 119, per=28.30%, avg=24.90, stdev=17.39, samples=467 iops : min= 1, max= 29, avg= 5.59, stdev= 4.38, samples=467 write: IOPS=5, BW=23.1KiB/s (23.6kB/s)(6260KiB/271136msec); 0 zone resets clat (msec): min=35, max=1205, avg=137.93, stdev=71.63 lat (msec): min=35, max=1205, avg=137.94, stdev=71.63 clat percentiles (msec): | 1.00th=[ 45], 5.00th=[ 59], 10.00th=[ 69], 20.00th=[ 85], | 30.00th=[ 97], 40.00th=[ 110], 50.00th=[ 123], 60.00th=[ 138], | 70.00th=[ 157], 80.00th=[ 182], 90.00th=[ 224], 95.00th=[ 268], | 99.00th=[ 368], 99.50th=[ 405], 99.90th=[ 531], 99.95th=[ 1200], | 99.99th=[ 1200] bw ( KiB/s): min= 7, max= 64, per=24.91%, avg=22.91, stdev=11.03, samples=525 iops : min= 1, max= 16, avg= 5.09, stdev= 2.81, samples=525 lat (msec) : 10=3.22%, 20=16.15%, 50=21.16%, 100=22.01%, 250=33.66% lat (msec) : 500=3.71%, 750=0.07%, 2000=0.03% cpu : usr=0.05%, sys=1.22%, ctx=5044, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145455: Tue Sep 29 08:01:29 2026 read: IOPS=5, BW=22.5KiB/s (23.0kB/s)(6052KiB/269111msec) clat (msec): min=4, max=502, avg=34.86, stdev=36.39 lat (msec): min=4, max=502, avg=34.86, stdev=36.39 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 20], 50.00th=[ 23], 60.00th=[ 27], | 70.00th=[ 34], 80.00th=[ 50], 90.00th=[ 75], 95.00th=[ 107], | 99.00th=[ 167], 99.50th=[ 201], 99.90th=[ 409], 99.95th=[ 502], | 99.99th=[ 502] bw ( KiB/s): min= 7, max= 103, per=28.31%, avg=24.92, stdev=17.93, samples=469 iops : min= 1, max= 25, avg= 5.59, stdev= 4.54, samples=469 write: IOPS=5, BW=23.2KiB/s (23.7kB/s)(6236KiB/269111msec); 0 zone resets clat (msec): min=33, max=1122, avg=138.45, stdev=73.31 lat (msec): min=33, max=1122, avg=138.45, stdev=73.31 clat percentiles (msec): | 1.00th=[ 48], 5.00th=[ 60], 10.00th=[ 69], 20.00th=[ 83], | 30.00th=[ 94], 40.00th=[ 108], 50.00th=[ 124], 60.00th=[ 138], | 70.00th=[ 157], 80.00th=[ 184], 90.00th=[ 226], 95.00th=[ 271], | 99.00th=[ 376], 99.50th=[ 414], 99.90th=[ 584], 99.95th=[ 1116], | 99.99th=[ 1116] bw ( KiB/s): min= 7, max= 63, per=24.82%, avg=22.83, stdev=10.94, samples=525 iops : min= 1, max= 15, avg= 5.06, stdev= 2.78, samples=525 lat (msec) : 10=3.84%, 20=17.38%, 50=19.21%, 100=23.44%, 250=32.16% lat (msec) : 500=3.84%, 750=0.10%, 2000=0.03% cpu : usr=0.06%, sys=1.16%, ctx=5072, 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=88.4KiB/s (90.5kB/s), 21.9KiB/s-22.5KiB/s (22.4kB/s-23.0kB/s), io=23.4MiB (24.6MB), run=269111-271557msec WRITE: bw=92.6KiB/s (94.8kB/s), 23.1KiB/s-23.4KiB/s (23.6kB/s-23.9kB/s), io=24.6MiB (25.7MB), run=269111-271557msec 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=145524: Tue Sep 29 08:02:15 2026 read: IOPS=11, BW=183KiB/s (187kB/s)(5920KiB/32332msec) clat (usec): min=30, max=283015, avg=42804.60, stdev=35446.91 lat (usec): min=30, max=283015, avg=42806.30, stdev=35446.91 clat percentiles (usec): | 1.00th=[ 41], 5.00th=[ 64], 10.00th=[ 80], 20.00th=[ 988], | 30.00th=[ 23987], 40.00th=[ 31589], 50.00th=[ 39584], 60.00th=[ 48497], | 70.00th=[ 56886], 80.00th=[ 68682], 90.00th=[ 85459], 95.00th=[ 98042], | 99.00th=[185598], 99.50th=[196084], 99.90th=[283116], 99.95th=[283116], | 99.99th=[283116] bw ( KiB/s): min= 31, max= 510, per=24.81%, avg=182.10, stdev=98.63, samples=63 iops : min= 1, max= 31, avg=10.59, stdev= 6.20, samples=63 write: IOPS=12, BW=197KiB/s (202kB/s)(6368KiB/32332msec); 0 zone resets clat (usec): min=1271, max=330879, avg=40729.93, stdev=44330.43 lat (usec): min=1274, max=330882, avg=40734.04, stdev=44331.04 clat percentiles (usec): | 1.00th=[ 1696], 5.00th=[ 2376], 10.00th=[ 3785], 20.00th=[ 6915], | 30.00th=[ 11076], 40.00th=[ 16057], 50.00th=[ 24773], 60.00th=[ 35914], | 70.00th=[ 50594], 80.00th=[ 71828], 90.00th=[ 99091], 95.00th=[128451], | 99.00th=[208667], 99.50th=[254804], 99.90th=[329253], 99.95th=[329253], | 99.99th=[329253] bw ( KiB/s): min= 23, max= 606, per=25.60%, avg=197.67, stdev=105.19, samples=63 iops : min= 1, max= 37, avg=11.57, stdev= 6.59, samples=63 lat (usec) : 50=1.17%, 100=6.51%, 250=1.43%, 1000=0.52% lat (msec) : 2=1.69%, 4=4.56%, 10=8.85%, 20=10.42%, 50=30.86% lat (msec) : 100=26.69%, 250=6.90%, 500=0.39% cpu : usr=0.12%, sys=6.08%, ctx=1524, 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=145525: Tue Sep 29 08:02:15 2026 read: IOPS=11, BW=176KiB/s (180kB/s)(5744KiB/32602msec) clat (usec): min=34, max=367856, avg=44140.21, stdev=38756.21 lat (usec): min=34, max=367857, avg=44142.38, stdev=38756.21 clat percentiles (usec): | 1.00th=[ 43], 5.00th=[ 69], 10.00th=[ 75], 20.00th=[ 137], | 30.00th=[ 21627], 40.00th=[ 31851], 50.00th=[ 42206], 60.00th=[ 52167], | 70.00th=[ 61604], 80.00th=[ 73925], 90.00th=[ 91751], 95.00th=[104334], | 99.00th=[147850], 99.50th=[156238], 99.90th=[367002], 99.95th=[367002], | 99.99th=[367002] bw ( KiB/s): min= 23, max= 472, per=25.68%, avg=188.52, stdev=88.24, samples=60 iops : min= 1, max= 29, avg=10.98, stdev= 5.57, samples=60 write: IOPS=12, BW=201KiB/s (206kB/s)(6544KiB/32602msec); 0 zone resets clat (usec): min=1557, max=314875, avg=40183.82, stdev=46019.96 lat (usec): min=1560, max=314878, avg=40190.37, stdev=46018.18 clat percentiles (usec): | 1.00th=[ 1680], 5.00th=[ 2114], 10.00th=[ 3130], 20.00th=[ 5735], | 30.00th=[ 9765], 40.00th=[ 16712], 50.00th=[ 24511], 60.00th=[ 35914], | 70.00th=[ 49021], 80.00th=[ 67634], 90.00th=[ 92799], 95.00th=[124257], | 99.00th=[223347], 99.50th=[240124], 99.90th=[316670], 99.95th=[316670], | 99.99th=[316670] bw ( KiB/s): min= 31, max= 376, per=26.02%, avg=200.88, stdev=84.67, samples=64 iops : min= 1, max= 23, avg=11.77, stdev= 5.35, samples=64 lat (usec) : 50=0.91%, 100=7.16%, 250=2.08%, 500=0.52%, 1000=0.13% lat (msec) : 2=2.99%, 4=4.95%, 10=9.90%, 20=7.81%, 50=28.91% lat (msec) : 100=26.95%, 250=7.29%, 500=0.39% cpu : usr=0.07%, sys=6.20%, ctx=1478, 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=145526: Tue Sep 29 08:02:15 2026 read: IOPS=12, BW=202KiB/s (207kB/s)(6256KiB/30959msec) clat (usec): min=39, max=173979, avg=42310.39, stdev=32302.45 lat (usec): min=39, max=173980, avg=42318.76, stdev=32301.42 clat percentiles (usec): | 1.00th=[ 44], 5.00th=[ 66], 10.00th=[ 76], 20.00th=[ 12387], | 30.00th=[ 27132], 40.00th=[ 33817], 50.00th=[ 40109], 60.00th=[ 45876], | 70.00th=[ 54789], 80.00th=[ 64750], 90.00th=[ 85459], 95.00th=[100140], | 99.00th=[145753], 99.50th=[168821], 99.90th=[173016], 99.95th=[173016], | 99.99th=[173016] bw ( KiB/s): min= 63, max= 447, per=27.82%, avg=204.23, stdev=83.09, samples=60 iops : min= 3, max= 27, avg=11.98, stdev= 5.23, samples=60 write: IOPS=12, BW=195KiB/s (200kB/s)(6032KiB/30959msec); 0 zone resets clat (usec): min=1493, max=310800, avg=37957.81, stdev=40582.01 lat (usec): min=1494, max=310803, avg=37960.96, stdev=40582.00 clat percentiles (usec): | 1.00th=[ 1745], 5.00th=[ 2114], 10.00th=[ 3425], 20.00th=[ 7046], | 30.00th=[ 9241], 40.00th=[ 16319], 50.00th=[ 24511], 60.00th=[ 35390], | 70.00th=[ 51119], 80.00th=[ 66847], 90.00th=[ 86508], 95.00th=[110625], | 99.00th=[187696], 99.50th=[304088], 99.90th=[312476], 99.95th=[312476], | 99.99th=[312476] bw ( KiB/s): min= 31, max= 414, per=25.64%, avg=197.97, stdev=79.43, samples=59 iops : min= 1, max= 25, avg=11.58, stdev= 5.01, samples=59 lat (usec) : 50=0.78%, 100=6.64%, 250=1.69%, 500=0.13%, 750=0.13% lat (usec) : 1000=0.26% lat (msec) : 2=1.69%, 4=4.56%, 10=9.64%, 20=8.85%, 50=33.33% lat (msec) : 100=26.43%, 250=5.60%, 500=0.26% cpu : usr=0.12%, sys=6.05%, ctx=1530, 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=145527: Tue Sep 29 08:02:15 2026 read: IOPS=12, BW=195KiB/s (200kB/s)(6032KiB/30946msec) clat (usec): min=40, max=229897, avg=42679.14, stdev=34545.61 lat (usec): min=40, max=229899, avg=42718.92, stdev=34517.55 clat percentiles (usec): | 1.00th=[ 46], 5.00th=[ 60], 10.00th=[ 77], 20.00th=[ 167], | 30.00th=[ 23200], 40.00th=[ 31065], 50.00th=[ 40109], 60.00th=[ 49021], | 70.00th=[ 58459], 80.00th=[ 70779], 90.00th=[ 87557], 95.00th=[ 96994], | 99.00th=[137364], 99.50th=[179307], 99.90th=[229639], 99.95th=[229639], | 99.99th=[229639] bw ( KiB/s): min= 29, max= 376, per=26.53%, avg=194.73, stdev=77.42, samples=60 iops : min= 1, max= 23, avg=11.37, stdev= 4.91, samples=60 write: IOPS=12, BW=202KiB/s (207kB/s)(6256KiB/30946msec); 0 zone resets clat (usec): min=1653, max=247251, avg=37068.27, stdev=37666.05 lat (usec): min=1655, max=247253, avg=37080.97, stdev=37681.45 clat percentiles (usec): | 1.00th=[ 1745], 5.00th=[ 2147], 10.00th=[ 3818], 20.00th=[ 6980], | 30.00th=[ 10159], 40.00th=[ 16909], 50.00th=[ 23987], 60.00th=[ 34866], | 70.00th=[ 45351], 80.00th=[ 63701], 90.00th=[ 85459], 95.00th=[104334], | 99.00th=[189793], 99.50th=[208667], 99.90th=[246416], 99.95th=[246416], | 99.99th=[246416] bw ( KiB/s): min= 31, max= 409, per=26.24%, avg=202.55, stdev=76.05, samples=60 iops : min= 1, max= 25, avg=11.88, stdev= 4.84, samples=60 lat (usec) : 50=0.65%, 100=8.07%, 250=1.82%, 500=0.26% lat (msec) : 2=1.95%, 4=4.04%, 10=9.38%, 20=8.46%, 50=31.77% lat (msec) : 100=28.52%, 250=5.08% cpu : usr=0.12%, sys=6.36%, ctx=1535, 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=735KiB/s (752kB/s), 176KiB/s-202KiB/s (180kB/s-207kB/s), io=23.4MiB (24.5MB), run=30946-32602msec WRITE: bw=773KiB/s (792kB/s), 195KiB/s-202KiB/s (200kB/s-207kB/s), io=24.6MiB (25.8MB), run=30946-32602msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145528: Tue Sep 29 08:02:50 2026 read: IOPS=5, BW=87.7KiB/s (89.8kB/s)(5920KiB/67469msec) clat (msec): min=7, max=354, avg=40.45, stdev=40.44 lat (msec): min=7, max=354, avg=40.45, stdev=40.44 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 16], | 30.00th=[ 19], 40.00th=[ 23], 50.00th=[ 26], 60.00th=[ 31], | 70.00th=[ 38], 80.00th=[ 55], 90.00th=[ 89], 95.00th=[ 124], | 99.00th=[ 194], 99.50th=[ 268], 99.90th=[ 355], 99.95th=[ 355], | 99.99th=[ 355] bw ( KiB/s): min= 30, max= 313, per=27.77%, avg=98.31, stdev=64.10, samples=118 iops : min= 1, max= 19, avg= 5.33, stdev= 4.08, samples=118 write: IOPS=5, BW=94.4KiB/s (96.6kB/s)(6368KiB/67469msec); 0 zone resets clat (msec): min=39, max=517, avg=131.63, stdev=67.39 lat (msec): min=39, max=517, avg=131.64, stdev=67.39 clat percentiles (msec): | 1.00th=[ 46], 5.00th=[ 58], 10.00th=[ 67], 20.00th=[ 79], | 30.00th=[ 89], 40.00th=[ 101], 50.00th=[ 114], 60.00th=[ 132], | 70.00th=[ 148], 80.00th=[ 178], 90.00th=[ 220], 95.00th=[ 262], | 99.00th=[ 351], 99.50th=[ 451], 99.90th=[ 518], 99.95th=[ 518], | 99.99th=[ 518] bw ( KiB/s): min= 29, max= 223, per=25.58%, avg=95.42, stdev=48.44, samples=131 iops : min= 1, max= 13, avg= 5.15, stdev= 3.09, samples=131 lat (msec) : 10=1.69%, 20=14.19%, 50=22.79%, 100=25.91%, 250=32.03% lat (msec) : 500=3.26%, 750=0.13% cpu : usr=0.05%, sys=1.43%, ctx=1285, 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=145529: Tue Sep 29 08:02:50 2026 read: IOPS=5, BW=85.1KiB/s (87.1kB/s)(5744KiB/67498msec) clat (msec): min=6, max=376, avg=36.88, stdev=38.90 lat (msec): min=6, max=376, avg=36.88, stdev=38.90 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 12], 20.00th=[ 16], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 25], 60.00th=[ 31], | 70.00th=[ 36], 80.00th=[ 46], 90.00th=[ 80], 95.00th=[ 104], | 99.00th=[ 209], 99.50th=[ 300], 99.90th=[ 376], 99.95th=[ 376], | 99.99th=[ 376] bw ( KiB/s): min= 29, max= 320, per=27.77%, avg=98.29, stdev=63.56, samples=114 iops : min= 1, max= 20, avg= 5.34, stdev= 4.07, samples=114 write: IOPS=6, BW=96.0KiB/s (99.3kB/s)(6544KiB/67498msec); 0 zone resets clat (msec): min=39, max=430, avg=132.18, stdev=67.37 lat (msec): min=39, max=430, avg=132.19, stdev=67.38 clat percentiles (msec): | 1.00th=[ 47], 5.00th=[ 58], 10.00th=[ 65], 20.00th=[ 80], | 30.00th=[ 89], 40.00th=[ 101], 50.00th=[ 115], 60.00th=[ 131], | 70.00th=[ 150], 80.00th=[ 178], 90.00th=[ 224], 95.00th=[ 268], | 99.00th=[ 342], 99.50th=[ 414], 99.90th=[ 430], 99.95th=[ 430], | 99.99th=[ 430] bw ( KiB/s): min= 30, max= 254, per=26.10%, avg=97.35, stdev=47.22, samples=132 iops : min= 1, max= 15, avg= 5.27, stdev= 2.99, samples=132 lat (msec) : 10=2.08%, 20=15.76%, 50=21.22%, 100=26.43%, 250=30.08% lat (msec) : 500=4.43% cpu : usr=0.05%, sys=1.46%, ctx=1331, 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=145530: Tue Sep 29 08:02:50 2026 read: IOPS=5, BW=95.2KiB/s (97.5kB/s)(6256KiB/65683msec) clat (msec): min=7, max=381, avg=40.00, stdev=42.24 lat (msec): min=7, max=381, avg=40.00, stdev=42.24 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 15], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 27], 60.00th=[ 32], | 70.00th=[ 37], 80.00th=[ 53], 90.00th=[ 86], 95.00th=[ 117], | 99.00th=[ 226], 99.50th=[ 232], 99.90th=[ 380], 99.95th=[ 380], | 99.99th=[ 380] bw ( KiB/s): min= 30, max= 316, per=29.74%, avg=105.26, stdev=72.25, samples=117 iops : min= 1, max= 19, avg= 5.78, stdev= 4.56, samples=117 write: IOPS=5, BW=91.8KiB/s (94.0kB/s)(6032KiB/65683msec); 0 zone resets clat (msec): min=40, max=532, avg=132.06, stdev=67.39 lat (msec): min=40, max=532, avg=132.07, stdev=67.39 clat percentiles (msec): | 1.00th=[ 46], 5.00th=[ 56], 10.00th=[ 67], 20.00th=[ 81], | 30.00th=[ 91], 40.00th=[ 103], 50.00th=[ 114], 60.00th=[ 132], | 70.00th=[ 153], 80.00th=[ 176], 90.00th=[ 220], 95.00th=[ 279], | 99.00th=[ 342], 99.50th=[ 363], 99.90th=[ 535], 99.95th=[ 535], | 99.99th=[ 535] bw ( KiB/s): min= 29, max= 223, per=24.47%, avg=91.28, stdev=46.23, samples=128 iops : min= 1, max= 13, avg= 4.88, stdev= 2.96, samples=128 lat (msec) : 10=2.47%, 20=16.28%, 50=22.53%, 100=24.61%, 250=30.60% lat (msec) : 500=3.39%, 750=0.13% cpu : usr=0.06%, sys=1.40%, ctx=1320, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145531: Tue Sep 29 08:02:50 2026 read: IOPS=5, BW=90.4KiB/s (92.6kB/s)(6032KiB/66691msec) clat (msec): min=7, max=339, avg=39.71, stdev=44.50 lat (msec): min=7, max=339, avg=39.71, stdev=44.50 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 14], 20.00th=[ 16], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 25], 60.00th=[ 30], | 70.00th=[ 36], 80.00th=[ 50], 90.00th=[ 84], 95.00th=[ 125], | 99.00th=[ 232], 99.50th=[ 284], 99.90th=[ 338], 99.95th=[ 338], | 99.99th=[ 338] bw ( KiB/s): min= 30, max= 319, per=28.50%, avg=100.90, stdev=65.57, samples=116 iops : min= 1, max= 19, avg= 5.51, stdev= 4.11, samples=116 write: IOPS=5, BW=93.8KiB/s (96.1kB/s)(6256KiB/66691msec); 0 zone resets clat (msec): min=31, max=443, avg=131.42, stdev=70.68 lat (msec): min=31, max=443, avg=131.43, stdev=70.68 clat percentiles (msec): | 1.00th=[ 40], 5.00th=[ 55], 10.00th=[ 64], 20.00th=[ 77], | 30.00th=[ 87], 40.00th=[ 100], 50.00th=[ 113], 60.00th=[ 127], | 70.00th=[ 144], 80.00th=[ 186], 90.00th=[ 230], 95.00th=[ 275], | 99.00th=[ 368], 99.50th=[ 422], 99.90th=[ 443], 99.95th=[ 443], | 99.99th=[ 443] bw ( KiB/s): min= 29, max= 224, per=25.45%, avg=94.95, stdev=50.25, samples=129 iops : min= 1, max= 14, avg= 5.12, stdev= 3.22, samples=129 lat (msec) : 10=0.91%, 20=17.84%, 50=22.66%, 100=24.74%, 250=29.95% lat (msec) : 500=3.91% cpu : usr=0.06%, sys=1.39%, ctx=1382, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=355KiB/s (363kB/s), 85.1KiB/s-95.2KiB/s (87.1kB/s-97.5kB/s), io=23.4MiB (24.5MB), run=65683-67498msec WRITE: bw=373KiB/s (382kB/s), 91.8KiB/s-96.0KiB/s (94.0kB/s-99.3kB/s), io=24.6MiB (25.8MB), run=65683-67498msec 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=145548: Tue Sep 29 08:03:07 2026 read: IOPS=1, BW=1257KiB/s (1287kB/s)(7168KiB/5702msec) clat (usec): min=1105, max=3162.6k, avg=580586.42, stdev=1144038.24 lat (usec): min=1107, max=3162.6k, avg=580588.37, stdev=1144038.06 clat percentiles (usec): | 1.00th=[ 1106], 5.00th=[ 1106], 10.00th=[ 1106], | 20.00th=[ 1205], 30.00th=[ 154141], 40.00th=[ 154141], | 50.00th=[ 225444], 60.00th=[ 240124], 70.00th=[ 240124], | 80.00th=[ 278922], 90.00th=[3170894], 95.00th=[3170894], | 99.00th=[3170894], 99.50th=[3170894], 99.90th=[3170894], | 99.95th=[3170894], 99.99th=[3170894] bw ( KiB/s): min= 1563, max= 6144, per=80.85%, avg=2903.50, stdev=2169.29, samples=4 iops : min= 1, max= 6, avg= 2.25, stdev= 2.50, samples=4 write: IOPS=0, BW=898KiB/s (919kB/s)(5120KiB/5702msec); 0 zone resets clat (msec): min=83, max=423, avg=284.16, stdev=137.16 lat (msec): min=83, max=423, avg=284.30, stdev=137.15 clat percentiles (msec): | 1.00th=[ 84], 5.00th=[ 84], 10.00th=[ 84], 20.00th=[ 84], | 30.00th=[ 213], 40.00th=[ 213], 50.00th=[ 321], 60.00th=[ 321], | 70.00th=[ 380], 80.00th=[ 380], 90.00th=[ 426], 95.00th=[ 426], | 99.00th=[ 426], 99.50th=[ 426], 99.90th=[ 426], 99.95th=[ 426], | 99.99th=[ 426] bw ( KiB/s): min= 1973, max= 3737, per=51.43%, avg=2586.00, stdev=997.50, samples=3 iops : min= 1, max= 3, avg= 2.00, stdev= 1.00, samples=3 lat (msec) : 2=16.67%, 100=8.33%, 250=33.33%, 500=33.33%, >=2000=8.33% cpu : usr=0.00%, sys=8.75%, ctx=360, 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=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=145549: Tue Sep 29 08:03:07 2026 read: IOPS=0, BW=388KiB/s (398kB/s)(2048KiB/5273msec) clat (usec): min=646, max=235963, avg=118304.67, stdev=166394.14 lat (usec): min=648, max=235965, avg=118306.91, stdev=166394.80 clat percentiles (usec): | 1.00th=[ 644], 5.00th=[ 644], 10.00th=[ 644], 20.00th=[ 644], | 30.00th=[ 644], 40.00th=[ 644], 50.00th=[ 644], 60.00th=[235930], | 70.00th=[235930], 80.00th=[235930], 90.00th=[235930], 95.00th=[235930], | 99.00th=[235930], 99.50th=[235930], 99.90th=[235930], 99.95th=[235930], | 99.99th=[235930] bw ( KiB/s): min= 1517, max= 2023, per=49.29%, avg=1770.00, stdev=357.80, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1942KiB/s (1989kB/s)(10.0MiB/5273msec); 0 zone resets clat (msec): min=115, max=1659, avg=489.30, stdev=473.84 lat (msec): min=116, max=1659, avg=489.52, stdev=473.79 clat percentiles (msec): | 1.00th=[ 116], 5.00th=[ 116], 10.00th=[ 116], 20.00th=[ 184], | 30.00th=[ 194], 40.00th=[ 211], 50.00th=[ 224], 60.00th=[ 271], | 70.00th=[ 584], 80.00th=[ 625], 90.00th=[ 818], 95.00th=[ 1653], | 99.00th=[ 1653], 99.50th=[ 1653], 99.90th=[ 1653], 99.95th=[ 1653], | 99.99th=[ 1653] bw ( KiB/s): min= 1973, max= 6047, per=72.33%, avg=3637.00, stdev=1695.14, samples=5 iops : min= 1, max= 5, avg= 2.60, stdev= 1.67, samples=5 lat (usec) : 750=8.33% lat (msec) : 250=50.00%, 500=8.33%, 750=16.67%, 1000=8.33%, 2000=8.33% cpu : usr=0.00%, sys=9.12%, ctx=122, 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=145550: Tue Sep 29 08:03:07 2026 read: IOPS=1, BW=1268KiB/s (1299kB/s)(6144KiB/4844msec) clat (msec): min=3, max=237, avg=106.67, stdev=113.27 lat (msec): min=3, max=237, avg=106.68, stdev=113.26 clat percentiles (msec): | 1.00th=[ 4], 5.00th=[ 4], 10.00th=[ 4], 20.00th=[ 8], | 30.00th=[ 8], 40.00th=[ 8], 50.00th=[ 8], 60.00th=[ 161], | 70.00th=[ 224], 80.00th=[ 224], 90.00th=[ 239], 95.00th=[ 239], | 99.00th=[ 239], 99.50th=[ 239], 99.90th=[ 239], 99.95th=[ 239], | 99.99th=[ 239] bw ( KiB/s): min= 1973, max= 4079, per=93.60%, avg=3361.00, stdev=1202.28, samples=3 iops : min= 1, max= 3, avg= 2.33, stdev= 1.15, samples=3 write: IOPS=1, BW=1268KiB/s (1299kB/s)(6144KiB/4844msec); 0 zone resets clat (msec): min=191, max=2260, avg=690.51, stdev=787.82 lat (msec): min=191, max=2260, avg=690.63, stdev=787.80 clat percentiles (msec): | 1.00th=[ 192], 5.00th=[ 192], 10.00th=[ 192], 20.00th=[ 305], | 30.00th=[ 305], 40.00th=[ 330], 50.00th=[ 330], 60.00th=[ 359], | 70.00th=[ 701], 80.00th=[ 701], 90.00th=[ 2265], 95.00th=[ 2265], | 99.00th=[ 2265], 99.50th=[ 2265], 99.90th=[ 2265], 99.95th=[ 2265], | 99.99th=[ 2265] bw ( KiB/s): min= 1505, max= 2039, per=38.07%, avg=1914.20, stdev=230.33, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 lat (msec) : 4=8.33%, 10=16.67%, 250=33.33%, 500=25.00%, 750=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.02%, sys=7.70%, ctx=108, 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=145552: Tue Sep 29 08:03:07 2026 read: IOPS=0, BW=995KiB/s (1019kB/s)(5120KiB/5146msec) clat (usec): min=478, max=233821, avg=56008.69, stdev=101072.72 lat (usec): min=478, max=233822, avg=56010.03, stdev=101072.69 clat percentiles (usec): | 1.00th=[ 478], 5.00th=[ 478], 10.00th=[ 478], 20.00th=[ 478], | 30.00th=[ 586], 40.00th=[ 586], 50.00th=[ 1909], 60.00th=[ 1909], | 70.00th=[ 43254], 80.00th=[ 43254], 90.00th=[233833], 95.00th=[233833], | 99.00th=[233833], 99.50th=[233833], 99.90th=[233833], 99.95th=[233833], | 99.99th=[233833] bw ( KiB/s): min= 8159, max= 8159, per=100.00%, avg=8159.00, stdev= 0.00, samples=1 iops : min= 7, max= 7, avg= 7.00, stdev= 0.00, samples=1 write: IOPS=1, BW=1393KiB/s (1426kB/s)(7168KiB/5146msec); 0 zone resets clat (msec): min=222, max=2495, avg=670.66, stdev=824.87 lat (msec): min=223, max=2495, avg=670.88, stdev=824.77 clat percentiles (msec): | 1.00th=[ 224], 5.00th=[ 224], 10.00th=[ 224], 20.00th=[ 279], | 30.00th=[ 284], 40.00th=[ 284], 50.00th=[ 305], 60.00th=[ 347], | 70.00th=[ 347], 80.00th=[ 768], 90.00th=[ 2500], 95.00th=[ 2500], | 99.00th=[ 2500], 99.50th=[ 2500], 99.90th=[ 2500], 99.95th=[ 2500], | 99.99th=[ 2500] bw ( KiB/s): min= 1484, max= 4031, per=47.37%, avg=2381.75, stdev=1127.02, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 lat (usec) : 500=8.33%, 750=8.33% lat (msec) : 2=8.33%, 50=8.33%, 250=16.67%, 500=33.33%, 1000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.02%, sys=7.42%, ctx=150, 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=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=3592KiB/s (3678kB/s), 388KiB/s-1268KiB/s (398kB/s-1299kB/s), io=20.0MiB (20.0MB), run=4844-5702msec WRITE: bw=5028KiB/s (5149kB/s), 898KiB/s-1942KiB/s (919kB/s-1989kB/s), io=28.0MiB (29.4MB), run=4844-5702msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145551: Tue Sep 29 08:03:08 2026 read: IOPS=1, BW=1169KiB/s (1197kB/s)(7168KiB/6133msec) clat (msec): min=55, max=2236, avg=546.62, stdev=796.35 lat (msec): min=55, max=2236, avg=546.62, stdev=796.35 clat percentiles (msec): | 1.00th=[ 56], 5.00th=[ 56], 10.00th=[ 56], 20.00th=[ 68], | 30.00th=[ 136], 40.00th=[ 136], 50.00th=[ 220], 60.00th=[ 239], | 70.00th=[ 239], 80.00th=[ 877], 90.00th=[ 2232], 95.00th=[ 2232], | 99.00th=[ 2232], 99.50th=[ 2232], 99.90th=[ 2232], 99.95th=[ 2232], | 99.99th=[ 2232] bw ( KiB/s): min= 1992, max= 4063, per=75.55%, avg=2522.50, stdev=1027.28, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 write: IOPS=0, BW=835KiB/s (855kB/s)(5120KiB/6133msec); 0 zone resets clat (msec): min=223, max=547, avg=349.90, stdev=136.53 lat (msec): min=223, max=547, avg=350.08, stdev=136.55 clat percentiles (msec): | 1.00th=[ 224], 5.00th=[ 224], 10.00th=[ 224], 20.00th=[ 224], | 30.00th=[ 226], 40.00th=[ 226], 50.00th=[ 338], 60.00th=[ 338], | 70.00th=[ 414], 80.00th=[ 414], 90.00th=[ 550], 95.00th=[ 550], | 99.00th=[ 550], 99.50th=[ 550], 99.90th=[ 550], 99.95th=[ 550], | 99.99th=[ 550] bw ( KiB/s): min= 1878, max= 2031, per=41.88%, avg=1958.00, stdev=76.74, samples=3 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=3 lat (msec) : 100=16.67%, 250=41.67%, 500=16.67%, 750=8.33%, 1000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=3.25%, ctx=92, 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=145553: Tue Sep 29 08:03:08 2026 read: IOPS=0, BW=348KiB/s (356kB/s)(2048KiB/5889msec) clat (msec): min=75, max=169, avg=122.92, stdev=66.48 lat (msec): min=75, max=169, avg=122.93, stdev=66.49 clat percentiles (msec): | 1.00th=[ 77], 5.00th=[ 77], 10.00th=[ 77], 20.00th=[ 77], | 30.00th=[ 77], 40.00th=[ 77], 50.00th=[ 77], 60.00th=[ 171], | 70.00th=[ 171], 80.00th=[ 171], 90.00th=[ 171], 95.00th=[ 171], | 99.00th=[ 171], 99.50th=[ 171], 99.90th=[ 171], 99.95th=[ 171], | 99.99th=[ 171] bw ( KiB/s): min= 2019, max= 2043, per=60.83%, avg=2031.00, stdev=16.97, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1739KiB/s (1781kB/s)(10.0MiB/5889msec); 0 zone resets clat (msec): min=161, max=2128, avg=509.01, stdev=592.85 lat (msec): min=162, max=2129, avg=509.18, stdev=592.83 clat percentiles (msec): | 1.00th=[ 163], 5.00th=[ 163], 10.00th=[ 163], 20.00th=[ 197], | 30.00th=[ 222], 40.00th=[ 247], 50.00th=[ 279], 60.00th=[ 363], | 70.00th=[ 368], 80.00th=[ 376], 90.00th=[ 751], 95.00th=[ 2123], | 99.00th=[ 2123], 99.50th=[ 2123], 99.90th=[ 2123], 99.95th=[ 2123], | 99.99th=[ 2123] bw ( KiB/s): min= 1965, max= 4087, per=64.33%, avg=3007.33, stdev=1128.10, samples=6 iops : min= 1, max= 3, avg= 2.00, stdev= 1.10, samples=6 lat (msec) : 100=8.33%, 250=41.67%, 500=33.33%, 750=8.33%, >=2000=8.33% cpu : usr=0.03%, sys=3.26%, ctx=99, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=145554: Tue Sep 29 08:03:08 2026 read: IOPS=1, BW=1029KiB/s (1054kB/s)(6144KiB/5971msec) clat (msec): min=86, max=197, avg=125.64, stdev=41.32 lat (msec): min=86, max=197, avg=125.64, stdev=41.32 clat percentiles (msec): | 1.00th=[ 87], 5.00th=[ 87], 10.00th=[ 87], 20.00th=[ 93], | 30.00th=[ 93], 40.00th=[ 104], 50.00th=[ 104], 60.00th=[ 131], | 70.00th=[ 144], 80.00th=[ 144], 90.00th=[ 197], 95.00th=[ 197], | 99.00th=[ 197], 99.50th=[ 197], 99.90th=[ 197], 99.95th=[ 197], | 99.99th=[ 197] bw ( KiB/s): min= 1965, max= 4039, per=99.79%, avg=3332.00, stdev=1184.09, samples=3 iops : min= 1, max= 3, avg= 2.33, stdev= 1.15, samples=3 write: IOPS=1, BW=1029KiB/s (1054kB/s)(6144KiB/5971msec); 0 zone resets clat (msec): min=242, max=2287, avg=854.35, stdev=768.39 lat (msec): min=242, max=2287, avg=854.56, stdev=768.39 clat percentiles (msec): | 1.00th=[ 243], 5.00th=[ 243], 10.00th=[ 243], 20.00th=[ 266], | 30.00th=[ 266], 40.00th=[ 514], 50.00th=[ 514], 60.00th=[ 743], | 70.00th=[ 1070], 80.00th=[ 1070], 90.00th=[ 2299], 95.00th=[ 2299], | 99.00th=[ 2299], 99.50th=[ 2299], 99.90th=[ 2299], 99.95th=[ 2299], | 99.99th=[ 2299] bw ( KiB/s): min= 1965, max= 4087, per=53.83%, avg=2516.75, stdev=1047.07, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 lat (msec) : 100=16.67%, 250=41.67%, 500=8.33%, 750=16.67%, 2000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.05%, sys=2.55%, ctx=84, 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=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=145555: Tue Sep 29 08:03:08 2026 read: IOPS=0, BW=862KiB/s (882kB/s)(5120KiB/5943msec) clat (msec): min=87, max=198, avg=136.16, stdev=40.66 lat (msec): min=87, max=198, avg=136.16, stdev=40.66 clat percentiles (msec): | 1.00th=[ 88], 5.00th=[ 88], 10.00th=[ 88], 20.00th=[ 88], | 30.00th=[ 121], 40.00th=[ 121], 50.00th=[ 136], 60.00th=[ 136], | 70.00th=[ 140], 80.00th=[ 140], 90.00th=[ 199], 95.00th=[ 199], | 99.00th=[ 199], 99.50th=[ 199], 99.90th=[ 199], 99.95th=[ 199], | 99.99th=[ 199] bw ( KiB/s): min= 8078, max= 8078, per=100.00%, avg=8078.00, stdev= 0.00, samples=1 iops : min= 7, max= 7, avg= 7.00, stdev= 0.00, samples=1 write: IOPS=1, BW=1206KiB/s (1235kB/s)(7168KiB/5943msec); 0 zone resets clat (msec): min=270, max=2055, avg=675.15, stdev=644.97 lat (msec): min=270, max=2056, avg=675.30, stdev=644.98 clat percentiles (msec): | 1.00th=[ 271], 5.00th=[ 271], 10.00th=[ 271], 20.00th=[ 317], | 30.00th=[ 338], 40.00th=[ 338], 50.00th=[ 388], 60.00th=[ 456], | 70.00th=[ 456], 80.00th=[ 902], 90.00th=[ 2056], 95.00th=[ 2056], | 99.00th=[ 2056], 99.50th=[ 2056], 99.90th=[ 2056], 99.95th=[ 2056], | 99.99th=[ 2056] bw ( KiB/s): min= 1878, max= 3992, per=50.78%, avg=2374.00, stdev=906.46, samples=5 iops : min= 1, max= 3, avg= 1.40, stdev= 0.89, samples=5 lat (msec) : 100=8.33%, 250=33.33%, 500=41.67%, 1000=8.33%, >=2000=8.33% cpu : usr=0.03%, sys=3.77%, ctx=88, 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=3339KiB/s (3419kB/s), 348KiB/s-1169KiB/s (356kB/s-1197kB/s), io=20.0MiB (20.0MB), run=5889-6133msec WRITE: bw=4675KiB/s (4787kB/s), 835KiB/s-1739KiB/s (855kB/s-1781kB/s), io=28.0MiB (29.4MB), run=5889-6133msec 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=145564: Tue Sep 29 08:03:24 2026 read: IOPS=0, BW=3189KiB/s (3266kB/s)(12.0MiB/3853msec) clat (msec): min=324, max=1798, avg=1227.05, stdev=790.70 lat (msec): min=324, max=1798, avg=1227.05, stdev=790.70 clat percentiles (msec): | 1.00th=[ 326], 5.00th=[ 326], 10.00th=[ 326], 20.00th=[ 326], | 30.00th=[ 326], 40.00th=[ 1552], 50.00th=[ 1552], 60.00th=[ 1552], | 70.00th=[ 1804], 80.00th=[ 1804], 90.00th=[ 1804], 95.00th=[ 1804], | 99.00th=[ 1804], 99.50th=[ 1804], 99.90th=[ 1804], 99.95th=[ 1804], | 99.99th=[ 1804] bw ( KiB/s): min= 7684, max= 8192, per=100.00%, avg=7938.00, stdev=359.21, 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=0.00%, sys=2.41%, ctx=41, 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=145565: Tue Sep 29 08:03:24 2026 read: IOPS=0, BW=1034KiB/s (1059kB/s)(4096KiB/3961msec) clat (nsec): min=1350.0M, max=1350.0M, avg=1350003483.00, stdev= 0.00 lat (nsec): min=1350.0M, max=1350.0M, avg=1350006780.00, stdev= 0.00 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=[ 1351], | 70.00th=[ 1351], 80.00th=[ 1351], 90.00th=[ 1351], 95.00th=[ 1351], | 99.00th=[ 1351], 99.50th=[ 1351], 99.90th=[ 1351], 99.95th=[ 1351], | 99.99th=[ 1351] bw ( KiB/s): min= 8143, max= 8143, per=100.00%, avg=8143.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2068KiB/s (2118kB/s)(8192KiB/3961msec); 0 zone resets clat (msec): min=829, max=1683, avg=1256.45, stdev=604.27 lat (msec): min=829, max=1684, avg=1257.14, stdev=604.46 clat percentiles (msec): | 1.00th=[ 827], 5.00th=[ 827], 10.00th=[ 827], 20.00th=[ 827], | 30.00th=[ 827], 40.00th=[ 827], 50.00th=[ 827], 60.00th=[ 1687], | 70.00th=[ 1687], 80.00th=[ 1687], 90.00th=[ 1687], 95.00th=[ 1687], | 99.00th=[ 1687], 99.50th=[ 1687], 99.90th=[ 1687], 99.95th=[ 1687], | 99.99th=[ 1687] 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) : 1000=33.33%, 2000=66.67% cpu : usr=0.00%, sys=2.58%, ctx=50, 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=145566: Tue Sep 29 08:03:24 2026 write: IOPS=1, BW=7030KiB/s (7198kB/s)(12.0MiB/1748msec); 0 zone resets clat (msec): min=500, max=639, avg=551.49, stdev=76.80 lat (msec): min=500, max=640, avg=552.17, stdev=77.00 clat percentiles (msec): | 1.00th=[ 502], 5.00th=[ 502], 10.00th=[ 502], 20.00th=[ 502], | 30.00th=[ 502], 40.00th=[ 514], 50.00th=[ 514], 60.00th=[ 514], | 70.00th=[ 642], 80.00th=[ 642], 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= 6725, max= 8175, per=100.00%, avg=7450.00, stdev=1025.30, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=100.00% cpu : usr=0.00%, sys=7.16%, ctx=50, 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=145567: Tue Sep 29 08:03:24 2026 write: IOPS=0, BW=2718KiB/s (2783kB/s)(12.0MiB/4521msec); 0 zone resets clat (msec): min=385, max=3218, avg=1484.19, stdev=1519.82 lat (msec): min=385, max=3219, avg=1484.70, stdev=1519.97 clat percentiles (msec): | 1.00th=[ 384], 5.00th=[ 384], 10.00th=[ 384], 20.00th=[ 384], | 30.00th=[ 384], 40.00th=[ 852], 50.00th=[ 852], 60.00th=[ 852], | 70.00th=[ 3205], 80.00th=[ 3205], 90.00th=[ 3205], 95.00th=[ 3205], | 99.00th=[ 3205], 99.50th=[ 3205], 99.90th=[ 3205], 99.95th=[ 3205], | 99.99th=[ 3205] bw ( KiB/s): min= 8047, max= 8062, per=100.00%, avg=8054.50, stdev=10.61, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 1000=33.33%, >=2000=33.33% cpu : usr=0.02%, sys=3.58%, 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=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=4136KiB/s (4236kB/s), 1034KiB/s-3189KiB/s (1059kB/s-3266kB/s), io=16.0MiB (16.8MB), run=3853-3961msec WRITE: bw=7248KiB/s (7422kB/s), 2068KiB/s-7030KiB/s (2118kB/s-7198kB/s), io=32.0MiB (33.6MB), run=1748-4521msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145568: Tue Sep 29 08:03:24 2026 read: IOPS=0, BW=3670KiB/s (3758kB/s)(12.0MiB/3348msec) clat (msec): min=669, max=1431, avg=1074.34, stdev=383.23 lat (msec): min=669, max=1431, avg=1074.34, stdev=383.23 clat percentiles (msec): | 1.00th=[ 667], 5.00th=[ 667], 10.00th=[ 667], 20.00th=[ 667], | 30.00th=[ 667], 40.00th=[ 1116], 50.00th=[ 1116], 60.00th=[ 1116], | 70.00th=[ 1435], 80.00th=[ 1435], 90.00th=[ 1435], 95.00th=[ 1435], | 99.00th=[ 1435], 99.50th=[ 1435], 99.90th=[ 1435], 99.95th=[ 1435], | 99.99th=[ 1435] bw ( KiB/s): min= 7772, max= 8143, per=100.00%, avg=7957.50, stdev=262.34, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=33.33%, 2000=66.67% cpu : usr=0.00%, sys=13.00%, ctx=228, 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=145569: Tue Sep 29 08:03:24 2026 read: IOPS=0, BW=1216KiB/s (1245kB/s)(4096KiB/3369msec) clat (nsec): min=1162.7M, max=1162.7M, avg=1162712576.00, stdev= 0.00 lat (nsec): min=1162.7M, max=1162.7M, avg=1162715208.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1167], 5.00th=[ 1167], 10.00th=[ 1167], 20.00th=[ 1167], | 30.00th=[ 1167], 40.00th=[ 1167], 50.00th=[ 1167], 60.00th=[ 1167], | 70.00th=[ 1167], 80.00th=[ 1167], 90.00th=[ 1167], 95.00th=[ 1167], | 99.00th=[ 1167], 99.50th=[ 1167], 99.90th=[ 1167], 99.95th=[ 1167], | 99.99th=[ 1167] bw ( KiB/s): min= 8143, max= 8143, per=100.00%, avg=8143.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2432KiB/s (2490kB/s)(8192KiB/3369msec); 0 zone resets clat (msec): min=604, max=1500, avg=1052.12, stdev=633.57 lat (msec): min=608, max=1502, avg=1055.12, stdev=632.20 clat percentiles (msec): | 1.00th=[ 609], 5.00th=[ 609], 10.00th=[ 609], 20.00th=[ 609], | 30.00th=[ 609], 40.00th=[ 609], 50.00th=[ 609], 60.00th=[ 1502], | 70.00th=[ 1502], 80.00th=[ 1502], 90.00th=[ 1502], 95.00th=[ 1502], | 99.00th=[ 1502], 99.50th=[ 1502], 99.90th=[ 1502], 99.95th=[ 1502], | 99.99th=[ 1502] bw ( KiB/s): min= 8000, max= 8000, per=100.00%, avg=8000.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 750=33.33%, 2000=66.67% cpu : usr=0.06%, sys=4.22%, ctx=91, 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=145570: Tue Sep 29 08:03:24 2026 write: IOPS=0, BW=2577KiB/s (2638kB/s)(12.0MiB/4769msec); 0 zone resets clat (msec): min=286, max=2945, avg=1522.75, stdev=1339.42 lat (msec): min=286, max=2945, avg=1523.29, stdev=1339.38 clat percentiles (msec): | 1.00th=[ 288], 5.00th=[ 288], 10.00th=[ 288], 20.00th=[ 288], | 30.00th=[ 288], 40.00th=[ 1334], 50.00th=[ 1334], 60.00th=[ 1334], | 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= 8159, max= 8159, per=100.00%, avg=8159.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=3.36%, ctx=47, 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=145571: Tue Sep 29 08:03:24 2026 write: IOPS=1, BW=4578KiB/s (4688kB/s)(12.0MiB/2684msec); 0 zone resets clat (msec): min=550, max=1079, avg=876.19, stdev=285.20 lat (msec): min=551, max=1079, avg=877.05, stdev=284.59 clat percentiles (msec): | 1.00th=[ 550], 5.00th=[ 550], 10.00th=[ 550], 20.00th=[ 550], | 30.00th=[ 550], 40.00th=[ 1003], 50.00th=[ 1003], 60.00th=[ 1003], | 70.00th=[ 1083], 80.00th=[ 1083], 90.00th=[ 1083], 95.00th=[ 1083], | 99.00th=[ 1083], 99.50th=[ 1083], 99.90th=[ 1083], 99.95th=[ 1083], | 99.99th=[ 1083] bw ( KiB/s): min= 6390, max= 7984, per=100.00%, avg=7187.00, stdev=1127.13, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=4.21%, ctx=38, majf=0, minf=9 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=4863KiB/s (4980kB/s), 1216KiB/s-3670KiB/s (1245kB/s-3758kB/s), io=16.0MiB (16.8MB), run=3348-3369msec WRITE: bw=6871KiB/s (7036kB/s), 2432KiB/s-4578KiB/s (2490kB/s-4688kB/s), io=32.0MiB (33.6MB), run=2684-4769msec