== sanity test 398b: DIO and buffer IO race ============== 01:04:18 (1769061858) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 4.82216 s, 10.4 MB/s mix direct rw 4096 by fio with 4 jobs... mix buffer rw 4096 by fio with 4 jobs... rand-rw: (g=0): rw=randrw, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=psync, iodepth=16 ... fio-3.19 Starting 4 processes rand-rw: (g=0): rw=randrw, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=psync, iodepth=16 ... fio-3.19 Starting 4 processes rand-rw: (groupid=0, jobs=1): err= 0: pid=182723: Thu Jan 22 01:06:25 2026 read: IOPS=13, BW=55.2KiB/s (56.6kB/s)(5992KiB/108465msec) clat (usec): min=126, max=245242, avg=40033.40, stdev=24271.72 lat (usec): min=127, max=245245, avg=40036.61, stdev=24270.99 clat percentiles (usec): | 1.00th=[ 155], 5.00th=[ 11207], 10.00th=[ 16319], 20.00th=[ 21103], | 30.00th=[ 25560], 40.00th=[ 30016], 50.00th=[ 34866], 60.00th=[ 41681], | 70.00th=[ 47973], 80.00th=[ 56886], 90.00th=[ 70779], 95.00th=[ 83362], | 99.00th=[116917], 99.50th=[128451], 99.90th=[229639], 99.95th=[244319], | 99.99th=[244319] bw ( KiB/s): min= 7, max= 102, per=25.35%, avg=54.51, stdev=19.08, samples=214 iops : min= 1, max= 25, avg=13.00, stdev= 4.80, samples=214 write: IOPS=14, BW=58.0KiB/s (59.4kB/s)(6296KiB/108465msec); 0 zone resets clat (usec): min=906, max=754067, avg=30507.65, stdev=36146.47 lat (usec): min=907, max=754069, avg=30530.73, stdev=36149.34 clat percentiles (usec): | 1.00th=[ 1123], 5.00th=[ 1369], 10.00th=[ 1827], 20.00th=[ 3523], | 30.00th=[ 6390], 40.00th=[ 13173], 50.00th=[ 21365], 60.00th=[ 28181], | 70.00th=[ 39060], 80.00th=[ 53740], 90.00th=[ 71828], 95.00th=[ 90702], | 99.00th=[137364], 99.50th=[156238], 99.90th=[246416], 99.95th=[750781], | 99.99th=[750781] bw ( KiB/s): min= 15, max= 127, per=25.47%, avg=57.31, stdev=23.63, samples=214 iops : min= 3, max= 31, avg=13.71, stdev= 5.93, samples=214 lat (usec) : 250=1.40%, 500=0.36%, 750=0.03%, 1000=0.07% lat (msec) : 2=5.70%, 4=5.92%, 10=6.90%, 20=12.43%, 50=42.32% lat (msec) : 100=21.71%, 250=3.12%, 1000=0.03% cpu : usr=0.11%, sys=6.12%, ctx=6803, 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=182724: Thu Jan 22 01:06:25 2026 read: IOPS=13, BW=53.4KiB/s (54.7kB/s)(5940KiB/111286msec) clat (usec): min=137, max=257109, avg=40326.32, stdev=26165.07 lat (usec): min=142, max=257111, avg=40330.67, stdev=26165.52 clat percentiles (usec): | 1.00th=[ 169], 5.00th=[ 12125], 10.00th=[ 16581], 20.00th=[ 20579], | 30.00th=[ 25560], 40.00th=[ 30016], 50.00th=[ 34866], 60.00th=[ 40633], | 70.00th=[ 47973], 80.00th=[ 56361], 90.00th=[ 69731], 95.00th=[ 84411], | 99.00th=[137364], 99.50th=[158335], 99.90th=[217056], 99.95th=[256902], | 99.99th=[256902] bw ( KiB/s): min= 7, max= 111, per=24.57%, avg=52.82, stdev=18.77, samples=220 iops : min= 1, max= 27, avg=12.56, stdev= 4.72, samples=220 write: IOPS=14, BW=57.0KiB/s (58.4kB/s)(6348KiB/111286msec); 0 zone resets clat (usec): min=796, max=724503, avg=32081.96, stdev=35276.01 lat (usec): min=797, max=724505, avg=32085.56, stdev=35276.97 clat percentiles (usec): | 1.00th=[ 1090], 5.00th=[ 1319], 10.00th=[ 1696], 20.00th=[ 3785], | 30.00th=[ 7701], 40.00th=[ 16909], 50.00th=[ 24249], 60.00th=[ 32113], | 70.00th=[ 40633], 80.00th=[ 54789], 90.00th=[ 72877], 95.00th=[ 91751], | 99.00th=[128451], 99.50th=[141558], 99.90th=[212861], 99.95th=[725615], | 99.99th=[725615] bw ( KiB/s): min= 7, max= 125, per=25.03%, avg=56.32, stdev=22.43, samples=220 iops : min= 1, max= 31, avg=13.45, stdev= 5.64, samples=220 lat (usec) : 250=1.04%, 500=0.33%, 750=0.13%, 1000=0.20% lat (msec) : 2=5.99%, 4=4.85%, 10=6.67%, 20=12.66%, 50=42.58% lat (msec) : 100=21.97%, 250=3.52%, 500=0.03%, 750=0.03% cpu : usr=0.09%, sys=5.84%, ctx=6958, 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=182725: Thu Jan 22 01:06:25 2026 read: IOPS=14, BW=56.6KiB/s (57.9kB/s)(6028KiB/106589msec) clat (usec): min=69, max=186596, avg=39691.37, stdev=24407.09 lat (usec): min=70, max=186598, avg=39694.41, stdev=24406.56 clat percentiles (usec): | 1.00th=[ 167], 5.00th=[ 10290], 10.00th=[ 15926], 20.00th=[ 21365], | 30.00th=[ 25560], 40.00th=[ 30540], 50.00th=[ 35390], 60.00th=[ 40633], | 70.00th=[ 46924], 80.00th=[ 56361], 90.00th=[ 68682], 95.00th=[ 85459], | 99.00th=[126354], 99.50th=[149947], 99.90th=[170918], 99.95th=[185598], | 99.99th=[185598] bw ( KiB/s): min= 15, max= 111, per=26.07%, avg=56.05, stdev=18.95, samples=211 iops : min= 3, max= 27, avg=13.38, stdev= 4.76, samples=211 write: IOPS=14, BW=58.7KiB/s (60.1kB/s)(6260KiB/106589msec); 0 zone resets clat (usec): min=958, max=673555, avg=29601.31, stdev=33852.70 lat (usec): min=959, max=673556, avg=29608.11, stdev=33853.33 clat percentiles (usec): | 1.00th=[ 1123], 5.00th=[ 1319], 10.00th=[ 1729], 20.00th=[ 3458], | 30.00th=[ 6259], 40.00th=[ 12780], 50.00th=[ 21365], 60.00th=[ 27657], | 70.00th=[ 38536], 80.00th=[ 51643], 90.00th=[ 69731], 95.00th=[ 87557], | 99.00th=[123208], 99.50th=[152044], 99.90th=[185598], 99.95th=[675283], | 99.99th=[675283] bw ( KiB/s): min= 7, max= 119, per=25.87%, avg=58.21, stdev=22.01, samples=211 iops : min= 1, max= 29, avg=13.92, stdev= 5.53, samples=211 lat (usec) : 100=0.03%, 250=1.30%, 500=0.49%, 750=0.07%, 1000=0.13% lat (msec) : 2=6.02%, 4=5.66%, 10=7.19%, 20=12.11%, 50=43.68% lat (msec) : 100=20.44%, 250=2.83%, 750=0.03% cpu : usr=0.10%, sys=5.86%, ctx=6803, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=182726: Thu Jan 22 01:06:25 2026 read: IOPS=13, BW=55.0KiB/s (57.3kB/s)(6052KiB/108097msec) clat (usec): min=108, max=210177, avg=39674.60, stdev=24174.08 lat (usec): min=108, max=210177, avg=39676.41, stdev=24174.02 clat percentiles (usec): | 1.00th=[ 153], 5.00th=[ 8586], 10.00th=[ 16057], 20.00th=[ 21365], | 30.00th=[ 25822], 40.00th=[ 30540], 50.00th=[ 34866], 60.00th=[ 41157], | 70.00th=[ 47973], 80.00th=[ 56886], 90.00th=[ 68682], 95.00th=[ 80217], | 99.00th=[124257], 99.50th=[149947], 99.90th=[181404], 99.95th=[210764], | 99.99th=[210764] bw ( KiB/s): min= 7, max= 104, per=25.79%, avg=55.44, stdev=18.95, samples=214 iops : min= 1, max= 26, avg=13.23, stdev= 4.74, samples=214 write: IOPS=14, BW=57.7KiB/s (59.1kB/s)(6236KiB/108097msec); 0 zone resets clat (usec): min=893, max=672372, avg=30543.19, stdev=34602.64 lat (usec): min=895, max=672374, avg=30546.57, stdev=34602.22 clat percentiles (usec): | 1.00th=[ 1106], 5.00th=[ 1434], 10.00th=[ 1909], 20.00th=[ 3949], | 30.00th=[ 6849], 40.00th=[ 14746], 50.00th=[ 22152], 60.00th=[ 28443], | 70.00th=[ 38536], 80.00th=[ 52691], 90.00th=[ 73925], 95.00th=[ 88605], | 99.00th=[135267], 99.50th=[158335], 99.90th=[206570], 99.95th=[675283], | 99.99th=[675283] bw ( KiB/s): min= 7, max= 135, per=25.38%, avg=57.11, stdev=22.05, samples=214 iops : min= 1, max= 33, avg=13.65, stdev= 5.53, samples=214 lat (usec) : 250=1.73%, 500=0.29%, 750=0.03%, 1000=0.33% lat (msec) : 2=5.40%, 4=4.72%, 10=8.30%, 20=11.10%, 50=43.82% lat (msec) : 100=21.39%, 250=2.86%, 750=0.03% cpu : usr=0.11%, sys=5.81%, ctx=6802, 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=216KiB/s (221kB/s), 53.4KiB/s-56.6KiB/s (54.7kB/s-57.9kB/s), io=23.4MiB (24.6MB), run=106589-111286msec WRITE: bw=226KiB/s (231kB/s), 57.0KiB/s-58.7KiB/s (58.4kB/s-60.1kB/s), io=24.6MiB (25.7MB), run=106589-111286msec rand-rw: (groupid=0, jobs=1): err= 0: pid=182728: Thu Jan 22 01:06:55 2026 read: IOPS=10, BW=42.7KiB/s (43.8kB/s)(5992KiB/140242msec) clat (msec): min=5, max=761, avg=35.82, stdev=37.06 lat (msec): min=5, max=761, avg=35.82, stdev=37.06 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 20], 50.00th=[ 24], 60.00th=[ 29], | 70.00th=[ 36], 80.00th=[ 50], 90.00th=[ 82], 95.00th=[ 111], | 99.00th=[ 150], 99.50th=[ 180], 99.90th=[ 245], 99.95th=[ 760], | 99.99th=[ 760] bw ( KiB/s): min= 7, max= 159, per=25.37%, avg=43.13, stdev=29.98, samples=272 iops : min= 1, max= 39, avg=10.14, stdev= 7.52, samples=272 write: IOPS=11, BW=44.9KiB/s (45.0kB/s)(6296KiB/140242msec); 0 zone resets clat (msec): min=7, max=338, avg=54.90, stdev=39.81 lat (msec): min=7, max=338, avg=54.91, stdev=39.81 clat percentiles (msec): | 1.00th=[ 14], 5.00th=[ 18], 10.00th=[ 21], 20.00th=[ 25], | 30.00th=[ 29], 40.00th=[ 35], 50.00th=[ 43], 60.00th=[ 53], | 70.00th=[ 65], 80.00th=[ 82], 90.00th=[ 106], 95.00th=[ 130], | 99.00th=[ 197], 99.50th=[ 266], 99.90th=[ 313], 99.95th=[ 338], | 99.99th=[ 338] bw ( KiB/s): min= 7, max= 128, per=25.09%, avg=44.66, stdev=28.16, samples=276 iops : min= 1, max= 32, avg=10.52, stdev= 7.09, samples=276 lat (msec) : 10=3.09%, 20=21.81%, 50=43.95%, 100=21.97%, 250=8.89% lat (msec) : 500=0.26%, 1000=0.03% cpu : usr=0.08%, sys=2.16%, ctx=4895, 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=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=182729: Thu Jan 22 01:06:55 2026 read: IOPS=10, BW=42.1KiB/s (43.1kB/s)(5940KiB/141062msec) clat (msec): min=5, max=801, avg=37.05, stdev=39.85 lat (msec): min=5, max=801, avg=37.05, stdev=39.85 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 20], 50.00th=[ 24], 60.00th=[ 30], | 70.00th=[ 39], 80.00th=[ 55], 90.00th=[ 83], 95.00th=[ 107], | 99.00th=[ 174], 99.50th=[ 213], 99.90th=[ 313], 99.95th=[ 802], | 99.99th=[ 802] bw ( KiB/s): min= 7, max= 152, per=24.72%, avg=42.02, stdev=30.71, samples=275 iops : min= 1, max= 38, avg= 9.85, stdev= 7.72, samples=275 write: IOPS=11, BW=45.0KiB/s (46.1kB/s)(6348KiB/141062msec); 0 zone resets clat (msec): min=10, max=390, avg=54.12, stdev=39.14 lat (msec): min=10, max=390, avg=54.13, stdev=39.14 clat percentiles (msec): | 1.00th=[ 13], 5.00th=[ 17], 10.00th=[ 20], 20.00th=[ 24], | 30.00th=[ 28], 40.00th=[ 34], 50.00th=[ 42], 60.00th=[ 52], | 70.00th=[ 65], 80.00th=[ 83], 90.00th=[ 107], 95.00th=[ 129], | 99.00th=[ 190], 99.50th=[ 213], 99.90th=[ 292], 99.95th=[ 393], | 99.99th=[ 393] bw ( KiB/s): min= 7, max= 143, per=25.12%, avg=44.71, stdev=28.45, samples=276 iops : min= 1, max= 35, avg=10.54, stdev= 7.15, samples=276 lat (msec) : 10=3.39%, 20=22.40%, 50=42.55%, 100=22.46%, 250=8.98% lat (msec) : 500=0.20%, 1000=0.03% cpu : usr=0.09%, sys=2.18%, ctx=4887, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1485,1587,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=182730: Thu Jan 22 01:06:55 2026 read: IOPS=10, BW=42.9KiB/s (43.0kB/s)(6028KiB/140418msec) clat (msec): min=5, max=242, avg=36.16, stdev=33.03 lat (msec): min=5, max=242, avg=36.17, stdev=33.03 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 21], 50.00th=[ 24], 60.00th=[ 29], | 70.00th=[ 37], 80.00th=[ 53], 90.00th=[ 85], 95.00th=[ 107], | 99.00th=[ 165], 99.50th=[ 182], 99.90th=[ 220], 99.95th=[ 243], | 99.99th=[ 243] bw ( KiB/s): min= 7, max= 175, per=25.30%, avg=43.02, stdev=29.75, samples=274 iops : min= 1, max= 43, avg=10.11, stdev= 7.49, samples=274 write: IOPS=11, BW=44.6KiB/s (45.7kB/s)(6260KiB/140418msec); 0 zone resets clat (msec): min=9, max=834, avg=54.80, stdev=43.53 lat (msec): min=9, max=834, avg=54.81, stdev=43.53 clat percentiles (msec): | 1.00th=[ 14], 5.00th=[ 18], 10.00th=[ 21], 20.00th=[ 26], | 30.00th=[ 29], 40.00th=[ 34], 50.00th=[ 42], 60.00th=[ 51], | 70.00th=[ 65], 80.00th=[ 82], 90.00th=[ 106], 95.00th=[ 128], | 99.00th=[ 192], 99.50th=[ 215], 99.90th=[ 393], 99.95th=[ 835], | 99.99th=[ 835] bw ( KiB/s): min= 7, max= 151, per=24.88%, avg=44.29, stdev=28.68, samples=276 iops : min= 1, max= 37, avg=10.43, stdev= 7.21, samples=276 lat (msec) : 10=3.29%, 20=21.39%, 50=44.27%, 100=22.01%, 250=8.85% lat (msec) : 500=0.16%, 1000=0.03% cpu : usr=0.08%, sys=2.25%, ctx=4967, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=182731: Thu Jan 22 01:06:55 2026 read: IOPS=10, BW=43.0KiB/s (44.0kB/s)(6052KiB/140724msec) clat (msec): min=4, max=311, avg=36.81, stdev=34.59 lat (msec): min=4, max=311, avg=36.82, stdev=34.59 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 21], 50.00th=[ 24], 60.00th=[ 30], | 70.00th=[ 39], 80.00th=[ 54], 90.00th=[ 84], 95.00th=[ 109], | 99.00th=[ 163], 99.50th=[ 218], 99.90th=[ 247], 99.95th=[ 313], | 99.99th=[ 313] bw ( KiB/s): min= 7, max= 168, per=25.37%, avg=43.14, stdev=29.84, samples=272 iops : min= 1, max= 42, avg=10.14, stdev= 7.52, samples=272 write: IOPS=11, BW=44.3KiB/s (45.4kB/s)(6236KiB/140724msec); 0 zone resets clat (msec): min=10, max=834, avg=54.43, stdev=44.11 lat (msec): min=10, max=834, avg=54.44, stdev=44.11 clat percentiles (msec): | 1.00th=[ 14], 5.00th=[ 18], 10.00th=[ 21], 20.00th=[ 24], | 30.00th=[ 29], 40.00th=[ 34], 50.00th=[ 40], 60.00th=[ 51], | 70.00th=[ 64], 80.00th=[ 82], 90.00th=[ 106], 95.00th=[ 131], | 99.00th=[ 188], 99.50th=[ 239], 99.90th=[ 338], 99.95th=[ 835], | 99.99th=[ 835] bw ( KiB/s): min= 7, max= 143, per=24.76%, avg=44.08, stdev=28.63, samples=275 iops : min= 1, max= 35, avg=10.37, stdev= 7.19, samples=275 lat (msec) : 10=3.35%, 20=20.87%, 50=44.56%, 100=22.17%, 250=8.79% lat (msec) : 500=0.23%, 1000=0.03% cpu : usr=0.08%, sys=2.20%, ctx=4888, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1513,1559,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=170KiB/s (174kB/s), 42.1KiB/s-43.0KiB/s (43.1kB/s-44.0kB/s), io=23.4MiB (24.6MB), run=140242-141062msec WRITE: bw=178KiB/s (182kB/s), 44.3KiB/s-45.0KiB/s (45.4kB/s-46.1kB/s), io=24.6MiB (25.7MB), run=140242-141062msec 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=182767: Thu Jan 22 01:07:34 2026 read: IOPS=13, BW=216KiB/s (221kB/s)(5920KiB/27415msec) clat (usec): min=118, max=212434, avg=39821.60, stdev=28108.80 lat (usec): min=118, max=212436, avg=39823.06, stdev=28108.93 clat percentiles (usec): | 1.00th=[ 141], 5.00th=[ 184], 10.00th=[ 5800], 20.00th=[ 20055], | 30.00th=[ 24249], 40.00th=[ 28181], 50.00th=[ 35390], 60.00th=[ 42206], | 70.00th=[ 48497], 80.00th=[ 56361], 90.00th=[ 73925], 95.00th=[ 88605], | 99.00th=[141558], 99.50th=[168821], 99.90th=[212861], 99.95th=[212861], | 99.99th=[212861] bw ( KiB/s): min= 62, max= 478, per=26.44%, avg=216.00, stdev=81.64, samples=53 iops : min= 3, max= 29, avg=12.74, stdev= 5.13, samples=53 write: IOPS=14, BW=232KiB/s (238kB/s)(6368KiB/27415msec); 0 zone resets clat (usec): min=1707, max=194916, avg=31413.72, stdev=30044.35 lat (usec): min=1709, max=194919, avg=31421.11, stdev=30046.81 clat percentiles (usec): | 1.00th=[ 1729], 5.00th=[ 2704], 10.00th=[ 3556], 20.00th=[ 6128], | 30.00th=[ 9372], 40.00th=[ 14222], 50.00th=[ 23462], 60.00th=[ 30802], | 70.00th=[ 41681], 80.00th=[ 53740], 90.00th=[ 70779], 95.00th=[ 88605], | 99.00th=[149947], 99.50th=[158335], 99.90th=[193987], 99.95th=[193987], | 99.99th=[193987] bw ( KiB/s): min= 63, max= 415, per=27.23%, avg=234.17, stdev=86.19, samples=53 iops : min= 3, max= 25, avg=13.91, stdev= 5.38, samples=53 lat (usec) : 250=3.39%, 500=0.39%, 750=0.13% lat (msec) : 2=1.56%, 4=5.60%, 10=10.94%, 20=11.33%, 50=41.80% lat (msec) : 100=21.35%, 250=3.52% cpu : usr=0.10%, sys=7.02%, ctx=1795, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=182768: Thu Jan 22 01:07:34 2026 read: IOPS=12, BW=196KiB/s (201kB/s)(5744KiB/29285msec) clat (usec): min=125, max=163789, avg=42533.78, stdev=26977.00 lat (usec): min=126, max=163789, avg=42535.31, stdev=26976.96 clat percentiles (usec): | 1.00th=[ 153], 5.00th=[ 239], 10.00th=[ 13829], 20.00th=[ 22152], | 30.00th=[ 27395], 40.00th=[ 32637], 50.00th=[ 39060], 60.00th=[ 44827], | 70.00th=[ 51119], 80.00th=[ 61080], 90.00th=[ 76022], 95.00th=[ 91751], | 99.00th=[141558], 99.50th=[147850], 99.90th=[164627], 99.95th=[164627], | 99.99th=[164627] bw ( KiB/s): min= 62, max= 316, per=23.75%, avg=194.02, stdev=60.78, samples=57 iops : min= 3, max= 19, avg=11.37, stdev= 3.84, samples=57 write: IOPS=13, BW=223KiB/s (229kB/s)(6544KiB/29285msec); 0 zone resets clat (usec): min=1104, max=215324, avg=33673.24, stdev=31446.45 lat (usec): min=1106, max=215328, avg=33676.86, stdev=31445.84 clat percentiles (usec): | 1.00th=[ 1614], 5.00th=[ 2278], 10.00th=[ 3425], 20.00th=[ 6063], | 30.00th=[ 11207], 40.00th=[ 17695], 50.00th=[ 24511], 60.00th=[ 31589], | 70.00th=[ 44303], 80.00th=[ 58983], 90.00th=[ 78119], 95.00th=[ 94897], | 99.00th=[123208], 99.50th=[143655], 99.90th=[214959], 99.95th=[214959], | 99.99th=[214959] bw ( KiB/s): min= 63, max= 541, per=25.61%, avg=220.21, stdev=92.78, samples=57 iops : min= 3, max= 33, avg=13.02, stdev= 5.82, samples=57 lat (usec) : 250=2.60%, 500=1.04%, 750=0.13% lat (msec) : 2=1.82%, 4=5.21%, 10=7.55%, 20=11.85%, 50=40.49% lat (msec) : 100=25.52%, 250=3.78% cpu : usr=0.11%, sys=6.99%, ctx=1858, 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=182769: Thu Jan 22 01:07:34 2026 read: IOPS=13, BW=215KiB/s (220kB/s)(6256KiB/29131msec) clat (usec): min=126, max=173373, avg=41515.43, stdev=25297.93 lat (usec): min=126, max=173374, avg=41516.87, stdev=25297.95 clat percentiles (usec): | 1.00th=[ 155], 5.00th=[ 302], 10.00th=[ 14877], 20.00th=[ 22414], | 30.00th=[ 27657], 40.00th=[ 32637], 50.00th=[ 36439], 60.00th=[ 42730], | 70.00th=[ 52691], 80.00th=[ 62129], 90.00th=[ 74974], 95.00th=[ 88605], | 99.00th=[108528], 99.50th=[119014], 99.90th=[173016], 99.95th=[173016], | 99.99th=[173016] bw ( KiB/s): min= 63, max= 345, per=26.41%, avg=215.81, stdev=60.78, samples=57 iops : min= 3, max= 21, avg=12.74, stdev= 3.86, samples=57 write: IOPS=12, BW=207KiB/s (212kB/s)(6032KiB/29131msec); 0 zone resets clat (usec): min=1518, max=174410, avg=33997.51, stdev=29781.68 lat (usec): min=1521, max=174413, avg=34005.05, stdev=29780.82 clat percentiles (usec): | 1.00th=[ 1598], 5.00th=[ 2900], 10.00th=[ 4555], 20.00th=[ 7701], | 30.00th=[ 11863], 40.00th=[ 19530], 50.00th=[ 25297], 60.00th=[ 33817], | 70.00th=[ 43779], 80.00th=[ 56886], 90.00th=[ 73925], 95.00th=[ 95945], | 99.00th=[123208], 99.50th=[126354], 99.90th=[175113], 99.95th=[175113], | 99.99th=[175113] bw ( KiB/s): min= 63, max= 415, per=23.76%, avg=204.37, stdev=80.85, samples=57 iops : min= 3, max= 25, avg=12.02, stdev= 5.06, samples=57 lat (usec) : 250=2.34%, 500=0.91%, 750=0.39%, 1000=0.13% lat (msec) : 2=2.08%, 4=2.60%, 10=9.38%, 20=9.64%, 50=43.62% lat (msec) : 100=25.65%, 250=3.26% cpu : usr=0.10%, sys=6.90%, ctx=1852, 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=182770: Thu Jan 22 01:07:34 2026 read: IOPS=13, BW=212KiB/s (217kB/s)(6032KiB/28415msec) clat (usec): min=100, max=136849, avg=40825.00, stdev=27596.30 lat (usec): min=102, max=136849, avg=40826.40, stdev=27596.29 clat percentiles (usec): | 1.00th=[ 145], 5.00th=[ 200], 10.00th=[ 1565], 20.00th=[ 20579], | 30.00th=[ 24249], 40.00th=[ 30802], 50.00th=[ 36963], 60.00th=[ 42730], | 70.00th=[ 49546], 80.00th=[ 60556], 90.00th=[ 78119], 95.00th=[ 93848], | 99.00th=[135267], 99.50th=[135267], 99.90th=[137364], 99.95th=[137364], | 99.99th=[137364] bw ( KiB/s): min= 63, max= 416, per=25.88%, avg=211.45, stdev=83.13, samples=55 iops : min= 3, max= 26, avg=12.45, stdev= 5.24, samples=55 write: IOPS=13, BW=220KiB/s (225kB/s)(6256KiB/28415msec); 0 zone resets clat (usec): min=1305, max=174017, avg=32930.75, stdev=31786.68 lat (usec): min=1307, max=174019, avg=32933.68, stdev=31787.28 clat percentiles (usec): | 1.00th=[ 1680], 5.00th=[ 2057], 10.00th=[ 3163], 20.00th=[ 5669], | 30.00th=[ 8455], 40.00th=[ 15139], 50.00th=[ 22938], 60.00th=[ 31589], | 70.00th=[ 42730], 80.00th=[ 55837], 90.00th=[ 81265], 95.00th=[ 98042], | 99.00th=[124257], 99.50th=[149947], 99.90th=[173016], 99.95th=[173016], | 99.99th=[173016] bw ( KiB/s): min= 95, max= 500, per=25.58%, avg=219.96, stdev=68.65, samples=55 iops : min= 5, max= 31, avg=13.00, stdev= 4.31, samples=55 lat (usec) : 250=2.99%, 500=1.17%, 1000=0.26% lat (msec) : 2=2.99%, 4=4.82%, 10=10.68%, 20=8.72%, 50=41.80% lat (msec) : 100=22.79%, 250=3.78% cpu : usr=0.08%, sys=6.95%, ctx=1800, 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=818KiB/s (838kB/s), 196KiB/s-216KiB/s (201kB/s-221kB/s), io=23.4MiB (24.5MB), run=27415-29285msec WRITE: bw=861KiB/s (881kB/s), 207KiB/s-232KiB/s (212kB/s-238kB/s), io=24.6MiB (25.8MB), run=27415-29285msec rand-rw: (groupid=0, jobs=1): err= 0: pid=182772: Thu Jan 22 01:07:43 2026 read: IOPS=9, BW=156KiB/s (160kB/s)(5920KiB/37966msec) clat (msec): min=6, max=244, avg=41.99, stdev=39.22 lat (msec): min=6, max=244, avg=42.00, stdev=39.23 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 15], | 30.00th=[ 18], 40.00th=[ 22], 50.00th=[ 27], 60.00th=[ 33], | 70.00th=[ 45], 80.00th=[ 61], 90.00th=[ 93], 95.00th=[ 127], | 99.00th=[ 180], 99.50th=[ 224], 99.90th=[ 245], 99.95th=[ 245], | 99.99th=[ 245] bw ( KiB/s): min= 31, max= 604, per=24.71%, avg=155.65, stdev=110.15, samples=75 iops : min= 1, max= 37, avg= 9.00, stdev= 6.90, samples=75 write: IOPS=10, BW=168KiB/s (172kB/s)(6368KiB/37966msec); 0 zone resets clat (msec): min=9, max=249, avg=56.18, stdev=38.71 lat (msec): min=9, max=249, avg=56.19, stdev=38.71 clat percentiles (msec): | 1.00th=[ 14], 5.00th=[ 19], 10.00th=[ 22], 20.00th=[ 27], | 30.00th=[ 32], 40.00th=[ 36], 50.00th=[ 43], 60.00th=[ 52], | 70.00th=[ 63], 80.00th=[ 85], 90.00th=[ 115], 95.00th=[ 138], | 99.00th=[ 190], 99.50th=[ 205], 99.90th=[ 249], 99.95th=[ 249], | 99.99th=[ 249] bw ( KiB/s): min= 31, max= 445, per=25.24%, avg=167.32, stdev=101.15, samples=75 iops : min= 1, max= 27, avg= 9.72, stdev= 6.35, samples=75 lat (msec) : 10=2.21%, 20=18.62%, 50=44.01%, 100=23.44%, 250=11.72% cpu : usr=0.06%, sys=2.40%, ctx=1204, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=182773: Thu Jan 22 01:07:43 2026 read: IOPS=9, BW=152KiB/s (156kB/s)(5744KiB/37818msec) clat (msec): min=6, max=245, avg=40.29, stdev=36.62 lat (msec): min=6, max=245, avg=40.29, stdev=36.62 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 12], 20.00th=[ 16], | 30.00th=[ 20], 40.00th=[ 22], 50.00th=[ 26], 60.00th=[ 31], | 70.00th=[ 44], 80.00th=[ 64], 90.00th=[ 94], 95.00th=[ 115], | 99.00th=[ 169], 99.50th=[ 222], 99.90th=[ 245], 99.95th=[ 245], | 99.99th=[ 245] bw ( KiB/s): min= 31, max= 507, per=24.46%, avg=154.11, stdev=105.13, samples=72 iops : min= 1, max= 31, avg= 8.89, stdev= 6.61, samples=72 write: IOPS=10, BW=173KiB/s (177kB/s)(6544KiB/37818msec); 0 zone resets clat (msec): min=11, max=227, avg=56.96, stdev=39.09 lat (msec): min=11, max=227, avg=56.96, stdev=39.09 clat percentiles (msec): | 1.00th=[ 15], 5.00th=[ 20], 10.00th=[ 22], 20.00th=[ 27], | 30.00th=[ 32], 40.00th=[ 36], 50.00th=[ 43], 60.00th=[ 53], | 70.00th=[ 68], 80.00th=[ 92], 90.00th=[ 111], 95.00th=[ 138], | 99.00th=[ 192], 99.50th=[ 218], 99.90th=[ 228], 99.95th=[ 228], | 99.99th=[ 228] bw ( KiB/s): min= 31, max= 510, per=25.56%, avg=169.47, stdev=100.72, samples=74 iops : min= 1, max= 31, avg= 9.86, stdev= 6.33, samples=74 lat (msec) : 10=2.08%, 20=17.45%, 50=46.35%, 100=22.01%, 250=12.11% cpu : usr=0.05%, sys=2.26%, ctx=1244, 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=182774: Thu Jan 22 01:07:43 2026 read: IOPS=10, BW=166KiB/s (170kB/s)(6256KiB/37598msec) clat (msec): min=5, max=296, avg=38.92, stdev=33.75 lat (msec): min=5, max=296, avg=38.93, stdev=33.75 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 16], | 30.00th=[ 20], 40.00th=[ 23], 50.00th=[ 27], 60.00th=[ 33], | 70.00th=[ 40], 80.00th=[ 59], 90.00th=[ 89], 95.00th=[ 108], | 99.00th=[ 165], 99.50th=[ 174], 99.90th=[ 296], 99.95th=[ 296], | 99.99th=[ 296] bw ( KiB/s): min= 31, max= 570, per=26.41%, avg=166.38, stdev=112.45, samples=74 iops : min= 1, max= 35, avg= 9.68, stdev= 7.08, samples=74 write: IOPS=10, BW=160KiB/s (164kB/s)(6032KiB/37598msec); 0 zone resets clat (msec): min=13, max=215, avg=59.26, stdev=38.21 lat (msec): min=13, max=215, avg=59.26, stdev=38.21 clat percentiles (msec): | 1.00th=[ 15], 5.00th=[ 20], 10.00th=[ 24], 20.00th=[ 29], | 30.00th=[ 35], 40.00th=[ 40], 50.00th=[ 45], 60.00th=[ 59], | 70.00th=[ 69], 80.00th=[ 87], 90.00th=[ 114], 95.00th=[ 144], | 99.00th=[ 192], 99.50th=[ 203], 99.90th=[ 215], 99.95th=[ 215], | 99.99th=[ 215] bw ( KiB/s): min= 31, max= 442, per=23.88%, avg=158.35, stdev=91.76, samples=74 iops : min= 1, max= 27, avg= 9.16, stdev= 5.76, samples=74 lat (msec) : 10=1.82%, 20=17.58%, 50=45.96%, 100=24.09%, 250=10.42% lat (msec) : 500=0.13% cpu : usr=0.09%, sys=2.36%, ctx=1202, 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=182775: Thu Jan 22 01:07:43 2026 read: IOPS=10, BW=160KiB/s (164kB/s)(6032KiB/37620msec) clat (msec): min=7, max=250, avg=40.51, stdev=36.57 lat (msec): min=7, max=250, avg=40.51, stdev=36.57 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 16], | 30.00th=[ 19], 40.00th=[ 22], 50.00th=[ 27], 60.00th=[ 33], | 70.00th=[ 43], 80.00th=[ 59], 90.00th=[ 93], 95.00th=[ 127], | 99.00th=[ 169], 99.50th=[ 188], 99.90th=[ 251], 99.95th=[ 251], | 99.99th=[ 251] bw ( KiB/s): min= 31, max= 542, per=25.14%, avg=158.35, stdev=103.99, samples=74 iops : min= 1, max= 33, avg= 9.16, stdev= 6.53, samples=74 write: IOPS=10, BW=166KiB/s (170kB/s)(6256KiB/37620msec); 0 zone resets clat (msec): min=11, max=254, avg=57.04, stdev=38.22 lat (msec): min=11, max=254, avg=57.05, stdev=38.22 clat percentiles (msec): | 1.00th=[ 15], 5.00th=[ 20], 10.00th=[ 22], 20.00th=[ 27], | 30.00th=[ 32], 40.00th=[ 37], 50.00th=[ 44], 60.00th=[ 55], | 70.00th=[ 68], 80.00th=[ 87], 90.00th=[ 109], 95.00th=[ 128], | 99.00th=[ 188], 99.50th=[ 220], 99.90th=[ 255], 99.95th=[ 255], | 99.99th=[ 255] bw ( KiB/s): min= 31, max= 476, per=24.92%, avg=165.23, stdev=100.00, samples=74 iops : min= 1, max= 29, avg= 9.59, stdev= 6.31, samples=74 lat (msec) : 10=2.08%, 20=18.49%, 50=44.79%, 100=23.70%, 250=10.68% lat (msec) : 500=0.26% cpu : usr=0.04%, sys=2.36%, ctx=1250, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=631KiB/s (646kB/s), 152KiB/s-166KiB/s (156kB/s-170kB/s), io=23.4MiB (24.5MB), run=37598-37966msec WRITE: bw=664KiB/s (680kB/s), 160KiB/s-173KiB/s (164kB/s-177kB/s), io=24.6MiB (25.8MB), run=37598-37966msec 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=182792: Thu Jan 22 01:07:55 2026 read: IOPS=2, BW=2323KiB/s (2378kB/s)(7168KiB/3086msec) clat (msec): min=105, max=312, avg=208.46, stdev=75.82 lat (msec): min=105, max=312, avg=208.46, stdev=75.82 clat percentiles (msec): | 1.00th=[ 106], 5.00th=[ 106], 10.00th=[ 106], 20.00th=[ 132], | 30.00th=[ 174], 40.00th=[ 174], 50.00th=[ 222], 60.00th=[ 232], | 70.00th=[ 232], 80.00th=[ 284], 90.00th=[ 313], 95.00th=[ 313], | 99.00th=[ 313], 99.50th=[ 313], 99.90th=[ 313], 99.95th=[ 313], | 99.99th=[ 313] bw ( KiB/s): min= 1976, max= 4096, per=71.49%, avg=3050.50, stdev=1202.36, samples=4 iops : min= 1, max= 4, avg= 2.25, stdev= 1.50, samples=4 write: IOPS=1, BW=1659KiB/s (1699kB/s)(5120KiB/3086msec); 0 zone resets clat (msec): min=113, max=433, avg=269.88, stdev=116.09 lat (msec): min=113, max=433, avg=270.03, stdev=116.11 clat percentiles (msec): | 1.00th=[ 114], 5.00th=[ 114], 10.00th=[ 114], 20.00th=[ 114], | 30.00th=[ 226], 40.00th=[ 226], 50.00th=[ 279], 60.00th=[ 279], | 70.00th=[ 300], 80.00th=[ 300], 90.00th=[ 435], 95.00th=[ 435], | 99.00th=[ 435], 99.50th=[ 435], 99.90th=[ 435], 99.95th=[ 435], | 99.99th=[ 435] bw ( KiB/s): min= 2011, max= 3976, per=42.15%, avg=2518.25, stdev=971.95, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 lat (msec) : 250=58.33%, 500=41.67% cpu : usr=0.03%, sys=24.05%, ctx=364, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=7,5,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=182793: Thu Jan 22 01:07:55 2026 read: IOPS=0, BW=427KiB/s (437kB/s)(2048KiB/4799msec) clat (usec): min=607, max=443120, avg=221863.77, stdev=312903.85 lat (usec): min=608, max=443122, avg=221865.81, stdev=312904.80 clat percentiles (usec): | 1.00th=[ 611], 5.00th=[ 611], 10.00th=[ 611], 20.00th=[ 611], | 30.00th=[ 611], 40.00th=[ 611], 50.00th=[ 611], 60.00th=[442500], | 70.00th=[442500], 80.00th=[442500], 90.00th=[442500], 95.00th=[442500], | 99.00th=[442500], 99.50th=[442500], 99.90th=[442500], 99.95th=[442500], | 99.99th=[442500] bw ( KiB/s): min= 2043, max= 2043, per=47.88%, avg=2043.00, stdev= 0.00, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=2, BW=2134KiB/s (2185kB/s)(10.0MiB/4799msec); 0 zone resets clat (msec): min=96, max=642, avg=408.77, stdev=209.86 lat (msec): min=97, max=642, avg=408.88, stdev=209.86 clat percentiles (msec): | 1.00th=[ 97], 5.00th=[ 97], 10.00th=[ 97], 20.00th=[ 153], | 30.00th=[ 192], 40.00th=[ 300], 50.00th=[ 393], 60.00th=[ 527], | 70.00th=[ 575], 80.00th=[ 600], 90.00th=[ 617], 95.00th=[ 642], | 99.00th=[ 642], 99.50th=[ 642], 99.90th=[ 642], 99.95th=[ 642], | 99.99th=[ 642] bw ( KiB/s): min= 1988, max= 4087, per=45.22%, avg=2701.33, stdev=1061.16, samples=6 iops : min= 1, max= 3, avg= 1.83, stdev= 0.98, samples=6 lat (usec) : 750=8.33% lat (msec) : 100=8.33%, 250=16.67%, 500=25.00%, 750=41.67% cpu : usr=0.00%, sys=18.74%, ctx=161, 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=182794: Thu Jan 22 01:07:55 2026 read: IOPS=1, BW=1838KiB/s (1883kB/s)(6144KiB/3342msec) clat (usec): min=1209, max=464006, avg=180087.24, stdev=177457.59 lat (usec): min=1211, max=464008, avg=180089.06, stdev=177457.25 clat percentiles (usec): | 1.00th=[ 1205], 5.00th=[ 1205], 10.00th=[ 1205], 20.00th=[ 1516], | 30.00th=[ 1516], 40.00th=[120062], 50.00th=[120062], 60.00th=[233833], | 70.00th=[261096], 80.00th=[261096], 90.00th=[463471], 95.00th=[463471], | 99.00th=[463471], 99.50th=[463471], 99.90th=[463471], 99.95th=[463471], | 99.99th=[463471] bw ( KiB/s): min= 1988, max= 4087, per=59.37%, avg=2533.50, stdev=1035.96, samples=4 iops : min= 1, max= 3, avg= 1.75, stdev= 0.96, samples=4 write: IOPS=1, BW=1838KiB/s (1883kB/s)(6144KiB/3342msec); 0 zone resets clat (msec): min=195, max=531, avg=361.71, stdev=117.00 lat (msec): min=196, max=531, avg=361.92, stdev=117.08 clat percentiles (msec): | 1.00th=[ 197], 5.00th=[ 197], 10.00th=[ 197], 20.00th=[ 296], | 30.00th=[ 296], 40.00th=[ 334], 50.00th=[ 334], 60.00th=[ 372], | 70.00th=[ 443], 80.00th=[ 443], 90.00th=[ 531], 95.00th=[ 531], | 99.00th=[ 531], 99.50th=[ 531], 99.90th=[ 531], 99.95th=[ 531], | 99.99th=[ 531] bw ( KiB/s): min= 1861, max= 2048, per=33.42%, avg=1996.60, stdev=79.70, samples=5 iops : min= 1, max= 2, avg= 1.20, stdev= 0.45, samples=5 lat (msec) : 2=16.67%, 250=25.00%, 500=50.00%, 750=8.33% cpu : usr=0.06%, sys=20.95%, ctx=178, 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=182795: Thu Jan 22 01:07:55 2026 read: IOPS=1, BW=1249KiB/s (1279kB/s)(5120KiB/4100msec) clat (usec): min=684, max=314439, avg=92538.52, stdev=138819.96 lat (usec): min=684, max=314441, avg=92539.69, stdev=138820.17 clat percentiles (usec): | 1.00th=[ 685], 5.00th=[ 685], 10.00th=[ 685], 20.00th=[ 685], | 30.00th=[ 1106], 40.00th=[ 1106], 50.00th=[ 1450], 60.00th=[ 1450], | 70.00th=[145753], 80.00th=[145753], 90.00th=[312476], 95.00th=[312476], | 99.00th=[312476], 99.50th=[312476], 99.90th=[312476], 99.95th=[312476], | 99.99th=[312476] 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=1748KiB/s (1790kB/s)(7168KiB/4100msec); 0 zone resets clat (msec): min=173, max=913, avg=481.00, stdev=253.29 lat (msec): min=173, max=913, avg=481.12, stdev=253.28 clat percentiles (msec): | 1.00th=[ 174], 5.00th=[ 174], 10.00th=[ 174], 20.00th=[ 228], | 30.00th=[ 451], 40.00th=[ 451], 50.00th=[ 464], 60.00th=[ 464], | 70.00th=[ 464], 80.00th=[ 676], 90.00th=[ 911], 95.00th=[ 911], | 99.00th=[ 911], 99.50th=[ 911], 99.90th=[ 911], 99.95th=[ 911], | 99.99th=[ 911] bw ( KiB/s): min= 2011, max= 4087, per=39.76%, avg=2375.17, stdev=838.76, samples=6 iops : min= 1, max= 3, avg= 1.50, stdev= 0.84, samples=6 lat (usec) : 750=8.33% lat (msec) : 2=16.67%, 250=25.00%, 500=33.33%, 750=8.33%, 1000=8.33% cpu : usr=0.00%, sys=16.15%, ctx=294, 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=4268KiB/s (4370kB/s), 427KiB/s-2323KiB/s (437kB/s-2378kB/s), io=20.0MiB (20.0MB), run=3086-4799msec WRITE: bw=5975KiB/s (6118kB/s), 1659KiB/s-2134KiB/s (1699kB/s-2185kB/s), io=28.0MiB (29.4MB), run=3086-4799msec rand-rw: (groupid=0, jobs=1): err= 0: pid=182787: Thu Jan 22 01:07:56 2026 read: IOPS=2, BW=2534KiB/s (2595kB/s)(7168KiB/2829msec) clat (msec): min=79, max=453, avg=207.66, stdev=147.68 lat (msec): min=79, max=453, avg=207.66, stdev=147.68 clat percentiles (msec): | 1.00th=[ 81], 5.00th=[ 81], 10.00th=[ 81], 20.00th=[ 87], | 30.00th=[ 93], 40.00th=[ 93], 50.00th=[ 129], 60.00th=[ 288], | 70.00th=[ 288], 80.00th=[ 326], 90.00th=[ 456], 95.00th=[ 456], | 99.00th=[ 456], 99.50th=[ 456], 99.90th=[ 456], 99.95th=[ 456], | 99.99th=[ 456] bw ( KiB/s): min= 1946, max= 4117, per=81.73%, avg=3364.67, stdev=1229.35, samples=3 iops : min= 1, max= 4, avg= 2.67, stdev= 1.53, samples=3 write: IOPS=1, BW=1810KiB/s (1853kB/s)(5120KiB/2829msec); 0 zone resets clat (msec): min=169, max=432, avg=266.41, stdev=101.26 lat (msec): min=169, max=432, avg=266.61, stdev=101.18 clat percentiles (msec): | 1.00th=[ 169], 5.00th=[ 169], 10.00th=[ 169], 20.00th=[ 169], | 30.00th=[ 203], 40.00th=[ 203], 50.00th=[ 257], 60.00th=[ 257], | 70.00th=[ 271], 80.00th=[ 271], 90.00th=[ 435], 95.00th=[ 435], | 99.00th=[ 435], 99.50th=[ 435], 99.90th=[ 435], 99.95th=[ 435], | 99.99th=[ 435] bw ( KiB/s): min= 1372, max= 2015, per=32.14%, avg=1852.60, stdev=270.21, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 lat (msec) : 100=25.00%, 250=25.00%, 500=50.00% cpu : usr=0.11%, sys=8.47%, ctx=95, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=7,5,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=182789: Thu Jan 22 01:07:56 2026 read: IOPS=0, BW=437KiB/s (447kB/s)(2048KiB/4687msec) clat (msec): min=160, max=504, avg=332.67, stdev=243.52 lat (msec): min=160, max=504, avg=332.67, stdev=243.52 clat percentiles (msec): | 1.00th=[ 161], 5.00th=[ 161], 10.00th=[ 161], 20.00th=[ 161], | 30.00th=[ 161], 40.00th=[ 161], 50.00th=[ 161], 60.00th=[ 506], | 70.00th=[ 506], 80.00th=[ 506], 90.00th=[ 506], 95.00th=[ 506], | 99.00th=[ 506], 99.50th=[ 506], 99.90th=[ 506], 99.95th=[ 506], | 99.99th=[ 506] bw ( KiB/s): min= 1410, max= 2035, per=41.84%, avg=1722.50, stdev=441.94, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=2, BW=2185KiB/s (2237kB/s)(10.0MiB/4687msec); 0 zone resets clat (msec): min=81, max=638, avg=388.85, stdev=228.13 lat (msec): min=81, max=638, avg=388.97, stdev=228.14 clat percentiles (msec): | 1.00th=[ 82], 5.00th=[ 82], 10.00th=[ 82], 20.00th=[ 99], | 30.00th=[ 142], 40.00th=[ 205], 50.00th=[ 489], 60.00th=[ 514], | 70.00th=[ 535], 80.00th=[ 567], 90.00th=[ 625], 95.00th=[ 642], | 99.00th=[ 642], 99.50th=[ 642], 99.90th=[ 642], 99.95th=[ 642], | 99.99th=[ 642] bw ( KiB/s): min= 1946, max= 4071, per=40.62%, avg=2341.33, stdev=848.35, samples=6 iops : min= 1, max= 3, avg= 1.33, stdev= 0.82, samples=6 lat (msec) : 100=16.67%, 250=25.00%, 500=8.33%, 750=50.00% cpu : usr=0.04%, sys=5.70%, ctx=91, 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=182790: Thu Jan 22 01:07:56 2026 read: IOPS=1, BW=1235KiB/s (1265kB/s)(6144KiB/4974msec) clat (msec): min=127, max=1134, avg=380.75, stdev=380.45 lat (msec): min=127, max=1134, avg=380.76, stdev=380.45 clat percentiles (msec): | 1.00th=[ 128], 5.00th=[ 128], 10.00th=[ 128], 20.00th=[ 161], | 30.00th=[ 161], 40.00th=[ 192], 50.00th=[ 192], 60.00th=[ 300], | 70.00th=[ 372], 80.00th=[ 372], 90.00th=[ 1133], 95.00th=[ 1133], | 99.00th=[ 1133], 99.50th=[ 1133], 99.90th=[ 1133], 99.95th=[ 1133], | 99.99th=[ 1133] bw ( KiB/s): min= 2000, max= 2043, per=49.19%, avg=2025.25, stdev=18.15, samples=4 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=4 write: IOPS=1, BW=1235KiB/s (1265kB/s)(6144KiB/4974msec); 0 zone resets clat (msec): min=119, max=955, avg=405.74, stdev=287.85 lat (msec): min=119, max=955, avg=406.14, stdev=287.73 clat percentiles (msec): | 1.00th=[ 120], 5.00th=[ 120], 10.00th=[ 120], 20.00th=[ 296], | 30.00th=[ 296], 40.00th=[ 300], 50.00th=[ 300], 60.00th=[ 330], | 70.00th=[ 435], 80.00th=[ 435], 90.00th=[ 953], 95.00th=[ 953], | 99.00th=[ 953], 99.50th=[ 953], 99.90th=[ 953], 99.95th=[ 953], | 99.99th=[ 953] bw ( KiB/s): min= 1882, max= 2043, per=34.73%, avg=2002.00, stdev=68.11, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 lat (msec) : 250=33.33%, 500=50.00%, 1000=8.33%, 2000=8.33% cpu : usr=0.04%, sys=6.35%, ctx=97, 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=182791: Thu Jan 22 01:07:56 2026 read: IOPS=1, BW=1047KiB/s (1072kB/s)(5120KiB/4889msec) clat (msec): min=92, max=534, avg=295.76, stdev=189.50 lat (msec): min=92, max=534, avg=295.76, stdev=189.51 clat percentiles (msec): | 1.00th=[ 93], 5.00th=[ 93], 10.00th=[ 93], 20.00th=[ 93], | 30.00th=[ 115], 40.00th=[ 115], 50.00th=[ 334], 60.00th=[ 334], | 70.00th=[ 405], 80.00th=[ 405], 90.00th=[ 535], 95.00th=[ 535], | 99.00th=[ 535], 99.50th=[ 535], 99.90th=[ 535], 99.95th=[ 535], | 99.99th=[ 535] bw ( KiB/s): min= 1996, max= 4063, per=65.60%, avg=2700.67, stdev=1180.05, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 write: IOPS=1, BW=1466KiB/s (1501kB/s)(7168KiB/4889msec); 0 zone resets clat (msec): min=139, max=733, avg=458.57, stdev=183.03 lat (msec): min=139, max=733, avg=458.67, stdev=183.02 clat percentiles (msec): | 1.00th=[ 140], 5.00th=[ 140], 10.00th=[ 140], 20.00th=[ 363], | 30.00th=[ 422], 40.00th=[ 422], 50.00th=[ 485], 60.00th=[ 514], | 70.00th=[ 514], 80.00th=[ 558], 90.00th=[ 735], 95.00th=[ 735], | 99.00th=[ 735], 99.50th=[ 735], 99.90th=[ 735], 99.95th=[ 735], | 99.99th=[ 735] bw ( KiB/s): min= 1882, max= 4055, per=41.62%, avg=2399.00, stdev=927.77, samples=5 iops : min= 1, max= 3, avg= 1.40, stdev= 0.89, samples=5 lat (msec) : 100=8.33%, 250=16.67%, 500=41.67%, 750=33.33% cpu : usr=0.02%, sys=7.20%, ctx=189, 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=4117KiB/s (4216kB/s), 437KiB/s-2534KiB/s (447kB/s-2595kB/s), io=20.0MiB (20.0MB), run=2829-4974msec WRITE: bw=5764KiB/s (5903kB/s), 1235KiB/s-2185KiB/s (1265kB/s-2237kB/s), io=28.0MiB (29.4MB), run=2829-4974msec 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=182804: Thu Jan 22 01:08:09 2026 read: IOPS=1, BW=5366KiB/s (5495kB/s)(12.0MiB/2290msec) clat (msec): min=542, max=934, avg=708.48, stdev=202.52 lat (msec): min=542, max=934, avg=708.48, stdev=202.52 clat percentiles (msec): | 1.00th=[ 542], 5.00th=[ 542], 10.00th=[ 542], 20.00th=[ 542], | 30.00th=[ 542], 40.00th=[ 651], 50.00th=[ 651], 60.00th=[ 651], | 70.00th=[ 936], 80.00th=[ 936], 90.00th=[ 936], 95.00th=[ 936], | 99.00th=[ 936], 99.50th=[ 936], 99.90th=[ 936], 99.95th=[ 936], | 99.99th=[ 936] bw ( KiB/s): min= 8062, max= 8078, per=100.00%, avg=8070.00, stdev=11.31, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=66.67%, 1000=33.33% cpu : usr=0.00%, sys=15.95%, ctx=284, 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=182806: Thu Jan 22 01:08:09 2026 read: IOPS=0, BW=1685KiB/s (1725kB/s)(4096KiB/2431msec) clat (nsec): min=588699k, max=588699k, avg=588698563.00, stdev= 0.00 lat (nsec): min=588703k, max=588703k, avg=588702818.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 592], 5.00th=[ 592], 10.00th=[ 592], 20.00th=[ 592], | 30.00th=[ 592], 40.00th=[ 592], 50.00th=[ 592], 60.00th=[ 592], | 70.00th=[ 592], 80.00th=[ 592], 90.00th=[ 592], 95.00th=[ 592], | 99.00th=[ 592], 99.50th=[ 592], 99.90th=[ 592], 99.95th=[ 592], | 99.99th=[ 592] bw ( KiB/s): min= 8078, max= 8078, per=100.00%, avg=8078.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=3370KiB/s (3451kB/s)(8192KiB/2431msec); 0 zone resets clat (msec): min=810, max=915, avg=863.22, stdev=74.02 lat (msec): min=812, max=916, avg=864.44, stdev=73.42 clat percentiles (msec): | 1.00th=[ 810], 5.00th=[ 810], 10.00th=[ 810], 20.00th=[ 810], | 30.00th=[ 810], 40.00th=[ 810], 50.00th=[ 810], 60.00th=[ 919], | 70.00th=[ 919], 80.00th=[ 919], 90.00th=[ 919], 95.00th=[ 919], | 99.00th=[ 919], 99.50th=[ 919], 99.90th=[ 919], 99.95th=[ 919], | 99.99th=[ 919] bw ( KiB/s): min= 8062, max= 8062, per=67.34%, avg=8062.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 750=33.33%, 1000=66.67% cpu : usr=0.00%, sys=6.75%, ctx=252, 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=182808: Thu Jan 22 01:08:09 2026 write: IOPS=1, BW=4490KiB/s (4597kB/s)(12.0MiB/2737msec); 0 zone resets clat (msec): min=543, max=1179, avg=856.99, stdev=318.20 lat (msec): min=543, max=1180, avg=857.70, stdev=318.23 clat percentiles (msec): | 1.00th=[ 542], 5.00th=[ 542], 10.00th=[ 542], 20.00th=[ 542], | 30.00th=[ 542], 40.00th=[ 852], 50.00th=[ 852], 60.00th=[ 852], | 70.00th=[ 1183], 80.00th=[ 1183], 90.00th=[ 1183], 95.00th=[ 1183], | 99.00th=[ 1183], 99.50th=[ 1183], 99.90th=[ 1183], 99.95th=[ 1183], | 99.99th=[ 1183] bw ( KiB/s): min= 8062, max= 8062, per=67.34%, avg=8062.00, stdev= 0.00, 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=0.04%, sys=4.24%, ctx=61, 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=182809: Thu Jan 22 01:08:09 2026 write: IOPS=1, BW=5437KiB/s (5568kB/s)(12.0MiB/2260msec); 0 zone resets clat (msec): min=527, max=837, avg=732.56, stdev=177.27 lat (msec): min=528, max=838, avg=733.20, stdev=177.60 clat percentiles (msec): | 1.00th=[ 527], 5.00th=[ 527], 10.00th=[ 527], 20.00th=[ 527], | 30.00th=[ 527], 40.00th=[ 835], 50.00th=[ 835], 60.00th=[ 835], | 70.00th=[ 835], 80.00th=[ 835], 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= 8078, max= 8078, per=67.47%, avg=8078.00, stdev= 0.00, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=33.33%, 1000=66.67% cpu : usr=0.00%, sys=7.92%, ctx=76, 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=6740KiB/s (6901kB/s), 1685KiB/s-5366KiB/s (1725kB/s-5495kB/s), io=16.0MiB (16.8MB), run=2290-2431msec WRITE: bw=11.7MiB/s (12.3MB/s), 3370KiB/s-5437KiB/s (3451kB/s-5568kB/s), io=32.0MiB (33.6MB), run=2260-2737msec rand-rw: (groupid=0, jobs=1): err= 0: pid=182802: Thu Jan 22 01:08:09 2026 read: IOPS=1, BW=5154KiB/s (5278kB/s)(12.0MiB/2384msec) clat (msec): min=450, max=1160, avg=787.45, stdev=356.54 lat (msec): min=450, max=1160, avg=787.45, stdev=356.54 clat percentiles (msec): | 1.00th=[ 451], 5.00th=[ 451], 10.00th=[ 451], 20.00th=[ 451], | 30.00th=[ 451], 40.00th=[ 751], 50.00th=[ 751], 60.00th=[ 751], | 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= 7892, max= 7968, per=100.00%, avg=7930.00, stdev=53.74, 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=0.00%, sys=5.16%, ctx=67, majf=0, minf=9 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=182803: Thu Jan 22 01:08:09 2026 read: IOPS=0, BW=1442KiB/s (1476kB/s)(4096KiB/2841msec) clat (nsec): min=862128k, max=862128k, avg=862128449.00, stdev= 0.00 lat (nsec): min=862132k, max=862132k, avg=862131804.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 860], 5.00th=[ 860], 10.00th=[ 860], 20.00th=[ 860], | 30.00th=[ 860], 40.00th=[ 860], 50.00th=[ 860], 60.00th=[ 860], | 70.00th=[ 860], 80.00th=[ 860], 90.00th=[ 860], 95.00th=[ 860], | 99.00th=[ 860], 99.50th=[ 860], 99.90th=[ 860], 99.95th=[ 860], | 99.99th=[ 860] bw ( KiB/s): min= 8015, max= 8015, per=100.00%, avg=8015.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2883KiB/s (2953kB/s)(8192KiB/2841msec); 0 zone resets clat (msec): min=177, max=1730, avg=953.76, stdev=1097.98 lat (msec): min=179, max=1730, avg=954.96, stdev=1096.91 clat percentiles (msec): | 1.00th=[ 178], 5.00th=[ 178], 10.00th=[ 178], 20.00th=[ 178], | 30.00th=[ 178], 40.00th=[ 178], 50.00th=[ 178], 60.00th=[ 1737], | 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] lat (msec) : 250=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=5.46%, ctx=82, 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=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=182805: Thu Jan 22 01:08:09 2026 write: IOPS=2, BW=8416KiB/s (8618kB/s)(12.0MiB/1460msec); 0 zone resets clat (msec): min=152, max=949, avg=438.44, stdev=443.32 lat (msec): min=153, max=953, avg=440.75, stdev=445.27 clat percentiles (msec): | 1.00th=[ 153], 5.00th=[ 153], 10.00th=[ 153], 20.00th=[ 153], | 30.00th=[ 153], 40.00th=[ 213], 50.00th=[ 213], 60.00th=[ 213], | 70.00th=[ 953], 80.00th=[ 953], 90.00th=[ 953], 95.00th=[ 953], | 99.00th=[ 953], 99.50th=[ 953], 99.90th=[ 953], 99.95th=[ 953], | 99.99th=[ 953] bw ( KiB/s): min=12900, max=12900, per=100.00%, avg=12900.00, stdev= 0.00, samples=1 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=1 lat (msec) : 250=66.67%, 1000=33.33% cpu : usr=0.00%, sys=10.69%, ctx=82, 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 rand-rw: (groupid=0, jobs=1): err= 0: pid=182807: Thu Jan 22 01:08:09 2026 write: IOPS=1, BW=7026KiB/s (7194kB/s)(12.0MiB/1749msec); 0 zone resets clat (msec): min=225, max=773, avg=561.00, stdev=293.96 lat (msec): min=227, max=773, avg=561.97, stdev=293.16 clat percentiles (msec): | 1.00th=[ 226], 5.00th=[ 226], 10.00th=[ 226], 20.00th=[ 226], | 30.00th=[ 226], 40.00th=[ 684], 50.00th=[ 684], 60.00th=[ 684], | 70.00th=[ 776], 80.00th=[ 776], 90.00th=[ 776], 95.00th=[ 776], | 99.00th=[ 776], 99.50th=[ 776], 99.90th=[ 776], 99.95th=[ 776], | 99.99th=[ 776] bw ( KiB/s): min= 7340, max= 8015, per=66.57%, avg=7677.50, stdev=477.30, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 250=33.33%, 750=33.33%, 1000=33.33% cpu : usr=0.00%, sys=8.12%, ctx=59, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=5767KiB/s (5905kB/s), 1442KiB/s-5154KiB/s (1476kB/s-5278kB/s), io=16.0MiB (16.8MB), run=2384-2841msec WRITE: bw=11.3MiB/s (11.8MB/s), 2883KiB/s-8416KiB/s (2953kB/s-8618kB/s), io=32.0MiB (33.6MB), run=1460-2841msec