== sanity test 398b: DIO and buffer IO race ============== 23:49:24 (1787370564) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 7.65817 s, 6.6 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=179657: Fri Aug 21 23:51:35 2026 read: IOPS=13, BW=55.3KiB/s (56.7kB/s)(5992KiB/108265msec) clat (usec): min=42, max=793329, avg=39876.89, stdev=31941.04 lat (usec): min=43, max=793332, avg=39878.33, stdev=31940.86 clat percentiles (usec): | 1.00th=[ 53], 5.00th=[ 8029], 10.00th=[ 15008], 20.00th=[ 20317], | 30.00th=[ 24773], 40.00th=[ 28967], 50.00th=[ 33817], 60.00th=[ 40633], | 70.00th=[ 47973], 80.00th=[ 57410], 90.00th=[ 70779], 95.00th=[ 85459], | 99.00th=[125305], 99.50th=[152044], 99.90th=[210764], 99.95th=[792724], | 99.99th=[792724] bw ( KiB/s): min= 7, max= 119, per=25.26%, avg=55.07, stdev=18.92, samples=213 iops : min= 1, max= 29, avg=13.11, stdev= 4.77, samples=213 write: IOPS=14, BW=58.2KiB/s (59.5kB/s)(6296KiB/108265msec); 0 zone resets clat (usec): min=962, max=197801, avg=30736.25, stdev=30904.15 lat (usec): min=962, max=197802, avg=30740.16, stdev=30903.91 clat percentiles (usec): | 1.00th=[ 1057], 5.00th=[ 1237], 10.00th=[ 1549], 20.00th=[ 3261], | 30.00th=[ 6325], 40.00th=[ 14746], 50.00th=[ 23725], 60.00th=[ 31065], | 70.00th=[ 39584], 80.00th=[ 53216], 90.00th=[ 74974], 95.00th=[ 91751], | 99.00th=[135267], 99.50th=[154141], 99.90th=[179307], 99.95th=[198181], | 99.99th=[198181] bw ( KiB/s): min= 7, max= 152, per=25.37%, avg=57.85, stdev=23.61, samples=213 iops : min= 1, max= 38, avg=13.82, stdev= 5.96, samples=213 lat (usec) : 50=0.10%, 100=1.92%, 250=0.20%, 500=0.03%, 1000=0.13% lat (msec) : 2=6.93%, 4=5.14%, 10=6.38%, 20=11.72%, 50=43.23% lat (msec) : 100=21.39%, 250=2.80%, 1000=0.03% cpu : usr=0.08%, sys=5.56%, ctx=6598, 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=179658: Fri Aug 21 23:51:35 2026 read: IOPS=13, BW=54.1KiB/s (55.4kB/s)(5940KiB/109867msec) clat (usec): min=36, max=829071, avg=39971.16, stdev=33030.94 lat (usec): min=43, max=829072, avg=39973.42, stdev=33031.80 clat percentiles (usec): | 1.00th=[ 50], 5.00th=[ 1057], 10.00th=[ 14484], 20.00th=[ 19530], | 30.00th=[ 23987], 40.00th=[ 28705], 50.00th=[ 33424], 60.00th=[ 40109], | 70.00th=[ 47973], 80.00th=[ 57934], 90.00th=[ 72877], 95.00th=[ 87557], | 99.00th=[123208], 99.50th=[156238], 99.90th=[200279], 99.95th=[826278], | 99.99th=[826278] bw ( KiB/s): min= 7, max= 112, per=24.58%, avg=53.59, stdev=19.76, samples=216 iops : min= 1, max= 28, avg=12.74, stdev= 4.98, samples=216 write: IOPS=14, BW=57.8KiB/s (59.2kB/s)(6348KiB/109867msec); 0 zone resets clat (usec): min=815, max=187787, avg=31721.44, stdev=31132.72 lat (usec): min=815, max=187788, avg=31723.61, stdev=31132.17 clat percentiles (usec): | 1.00th=[ 1057], 5.00th=[ 1254], 10.00th=[ 1729], 20.00th=[ 3425], | 30.00th=[ 6456], 40.00th=[ 15401], 50.00th=[ 24249], 60.00th=[ 31589], | 70.00th=[ 42206], 80.00th=[ 55837], 90.00th=[ 76022], 95.00th=[ 94897], | 99.00th=[128451], 99.50th=[143655], 99.90th=[166724], 99.95th=[187696], | 99.99th=[187696] bw ( KiB/s): min= 15, max= 135, per=25.08%, avg=57.19, stdev=22.96, samples=216 iops : min= 3, max= 33, avg=13.65, stdev= 5.77, samples=216 lat (usec) : 50=0.42%, 100=1.60%, 250=0.20%, 500=0.10%, 750=0.10% lat (usec) : 1000=0.13% lat (msec) : 2=5.96%, 4=5.53%, 10=6.90%, 20=12.30%, 50=40.85% lat (msec) : 100=22.40%, 250=3.48%, 1000=0.03% cpu : usr=0.08%, sys=5.45%, ctx=6653, majf=0, minf=17 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1485,1587,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179659: Fri Aug 21 23:51:35 2026 read: IOPS=14, BW=56.7KiB/s (58.0kB/s)(6028KiB/106402msec) clat (usec): min=44, max=186678, avg=38195.56, stdev=24731.82 lat (usec): min=45, max=186679, avg=38197.84, stdev=24732.55 clat percentiles (usec): | 1.00th=[ 53], 5.00th=[ 1205], 10.00th=[ 14484], 20.00th=[ 19268], | 30.00th=[ 23462], 40.00th=[ 27657], 50.00th=[ 33424], 60.00th=[ 39060], | 70.00th=[ 45876], 80.00th=[ 55837], 90.00th=[ 68682], 95.00th=[ 83362], | 99.00th=[123208], 99.50th=[143655], 99.90th=[183501], 99.95th=[187696], | 99.99th=[187696] bw ( KiB/s): min= 8, max= 126, per=25.99%, avg=56.66, stdev=19.80, samples=208 iops : min= 2, max= 31, avg=13.51, stdev= 4.96, samples=208 write: IOPS=14, BW=58.8KiB/s (60.2kB/s)(6260KiB/106402msec); 0 zone resets clat (usec): min=976, max=934804, avg=31116.17, stdev=38539.35 lat (usec): min=978, max=934806, avg=31118.65, stdev=38539.15 clat percentiles (usec): | 1.00th=[ 1074], 5.00th=[ 1205], 10.00th=[ 1516], 20.00th=[ 3392], | 30.00th=[ 6390], 40.00th=[ 13566], 50.00th=[ 22152], 60.00th=[ 30016], | 70.00th=[ 40109], 80.00th=[ 53216], 90.00th=[ 74974], 95.00th=[ 91751], | 99.00th=[129500], 99.50th=[152044], 99.90th=[233833], 99.95th=[935330], | 99.99th=[935330] bw ( KiB/s): min= 7, max= 119, per=25.63%, avg=58.44, stdev=22.22, samples=209 iops : min= 1, max= 29, avg=13.96, stdev= 5.58, samples=209 lat (usec) : 50=0.20%, 100=2.08%, 250=0.16%, 1000=0.03% lat (msec) : 2=6.87%, 4=4.65%, 10=7.03%, 20=14.03%, 50=41.63% lat (msec) : 100=20.51%, 250=2.77%, 1000=0.03% cpu : usr=0.08%, sys=5.69%, ctx=6666, 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=179660: Fri Aug 21 23:51:35 2026 read: IOPS=13, BW=55.4KiB/s (56.7kB/s)(6052KiB/109297msec) clat (usec): min=37, max=223471, avg=37845.58, stdev=25465.98 lat (usec): min=38, max=223484, avg=37848.92, stdev=25465.40 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 106], 10.00th=[ 13829], 20.00th=[ 18744], | 30.00th=[ 22938], 40.00th=[ 27395], 50.00th=[ 32375], 60.00th=[ 38536], | 70.00th=[ 46400], 80.00th=[ 55313], 90.00th=[ 68682], 95.00th=[ 82314], | 99.00th=[128451], 99.50th=[154141], 99.90th=[179307], 99.95th=[223347], | 99.99th=[223347] bw ( KiB/s): min= 7, max= 111, per=25.52%, avg=55.64, stdev=20.28, samples=213 iops : min= 1, max= 27, avg=13.25, stdev= 5.12, samples=213 write: IOPS=14, BW=57.1KiB/s (58.4kB/s)(6236KiB/109297msec); 0 zone resets clat (usec): min=984, max=922054, avg=33258.67, stdev=40238.33 lat (usec): min=986, max=922056, avg=33261.84, stdev=40237.20 clat percentiles (usec): | 1.00th=[ 1074], 5.00th=[ 1221], 10.00th=[ 1598], 20.00th=[ 3097], | 30.00th=[ 6521], 40.00th=[ 15664], 50.00th=[ 24511], 60.00th=[ 32375], | 70.00th=[ 43254], 80.00th=[ 57410], 90.00th=[ 79168], 95.00th=[ 98042], | 99.00th=[137364], 99.50th=[156238], 99.90th=[337642], 99.95th=[918553], | 99.99th=[918553] bw ( KiB/s): min= 7, max= 160, per=24.91%, avg=56.79, stdev=22.29, samples=215 iops : min= 1, max= 40, avg=13.54, stdev= 5.64, samples=215 lat (usec) : 50=0.39%, 100=1.99%, 250=0.33%, 500=0.07%, 1000=0.13% lat (msec) : 2=6.35%, 4=5.70%, 10=6.15%, 20=12.92%, 50=40.85% lat (msec) : 100=21.55%, 250=3.52%, 500=0.03%, 1000=0.03% cpu : usr=0.08%, sys=5.42%, ctx=6635, majf=0, minf=18 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=219KiB/s (224kB/s), 54.1KiB/s-56.7KiB/s (55.4kB/s-58.0kB/s), io=23.4MiB (24.6MB), run=106402-109867msec WRITE: bw=229KiB/s (234kB/s), 57.1KiB/s-58.8KiB/s (58.4kB/s-60.2kB/s), io=24.6MiB (25.7MB), run=106402-109867msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179652: Fri Aug 21 23:52:10 2026 read: IOPS=10, BW=41.3KiB/s (42.3kB/s)(5992KiB/144952msec) clat (msec): min=5, max=875, avg=38.20, stdev=41.29 lat (msec): min=5, max=875, avg=38.21, stdev=41.29 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 25], 60.00th=[ 31], | 70.00th=[ 40], 80.00th=[ 54], 90.00th=[ 85], 95.00th=[ 110], | 99.00th=[ 184], 99.50th=[ 201], 99.90th=[ 292], 99.95th=[ 877], | 99.99th=[ 877] bw ( KiB/s): min= 7, max= 143, per=24.82%, avg=40.95, stdev=27.42, samples=284 iops : min= 1, max= 35, avg= 9.60, stdev= 6.91, samples=284 write: IOPS=10, BW=43.4KiB/s (44.5kB/s)(6296KiB/144952msec); 0 zone resets clat (msec): min=11, max=303, avg=55.46, stdev=36.38 lat (msec): min=11, max=303, avg=55.46, stdev=36.38 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 21], 10.00th=[ 23], 20.00th=[ 27], | 30.00th=[ 32], 40.00th=[ 37], 50.00th=[ 43], 60.00th=[ 53], | 70.00th=[ 65], 80.00th=[ 83], 90.00th=[ 105], 95.00th=[ 125], | 99.00th=[ 178], 99.50th=[ 201], 99.90th=[ 296], 99.95th=[ 305], | 99.99th=[ 305] bw ( KiB/s): min= 7, max= 120, per=24.91%, avg=43.09, stdev=25.36, samples=284 iops : min= 1, max= 30, avg=10.13, stdev= 6.37, samples=284 lat (msec) : 10=2.67%, 20=18.82%, 50=46.22%, 100=23.05%, 250=9.11% lat (msec) : 500=0.10%, 1000=0.03% cpu : usr=0.06%, sys=1.95%, ctx=4795, 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=179653: Fri Aug 21 23:52:10 2026 read: IOPS=10, BW=40.0KiB/s (41.9kB/s)(5940KiB/145046msec) clat (msec): min=4, max=908, avg=37.69, stdev=40.47 lat (msec): min=4, max=908, avg=37.69, stdev=40.47 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 26], 60.00th=[ 32], | 70.00th=[ 39], 80.00th=[ 53], 90.00th=[ 83], 95.00th=[ 109], | 99.00th=[ 165], 99.50th=[ 188], 99.90th=[ 305], 99.95th=[ 911], | 99.99th=[ 911] bw ( KiB/s): min= 7, max= 134, per=25.29%, avg=41.73, stdev=27.58, samples=278 iops : min= 1, max= 33, avg= 9.79, stdev= 6.93, samples=278 write: IOPS=10, BW=43.8KiB/s (44.8kB/s)(6348KiB/145046msec); 0 zone resets clat (msec): min=11, max=367, avg=55.85, stdev=38.02 lat (msec): min=11, max=367, avg=55.85, stdev=38.02 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 20], 10.00th=[ 23], 20.00th=[ 28], | 30.00th=[ 32], 40.00th=[ 37], 50.00th=[ 43], 60.00th=[ 53], | 70.00th=[ 65], 80.00th=[ 82], 90.00th=[ 110], 95.00th=[ 129], | 99.00th=[ 184], 99.50th=[ 205], 99.90th=[ 334], 99.95th=[ 368], | 99.99th=[ 368] bw ( KiB/s): min= 7, max= 143, per=25.26%, avg=43.70, stdev=25.65, samples=284 iops : min= 1, max= 35, avg=10.29, stdev= 6.45, samples=284 lat (msec) : 10=2.90%, 20=18.07%, 50=47.10%, 100=22.40%, 250=9.31% lat (msec) : 500=0.20%, 1000=0.03% cpu : usr=0.06%, sys=1.94%, ctx=4732, 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=179654: Fri Aug 21 23:52:10 2026 read: IOPS=10, BW=41.5KiB/s (42.5kB/s)(6028KiB/145117msec) clat (msec): min=5, max=294, avg=38.56, stdev=34.72 lat (msec): min=5, max=294, avg=38.56, stdev=34.72 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 18], 40.00th=[ 22], 50.00th=[ 26], 60.00th=[ 31], | 70.00th=[ 42], 80.00th=[ 59], 90.00th=[ 86], 95.00th=[ 110], | 99.00th=[ 163], 99.50th=[ 203], 99.90th=[ 245], 99.95th=[ 296], | 99.99th=[ 296] bw ( KiB/s): min= 7, max= 159, per=25.27%, avg=41.70, stdev=26.93, samples=282 iops : min= 1, max= 39, avg= 9.78, stdev= 6.77, samples=282 write: IOPS=10, BW=43.1KiB/s (44.2kB/s)(6260KiB/145117msec); 0 zone resets clat (msec): min=11, max=942, avg=55.32, stdev=43.71 lat (msec): min=11, max=942, avg=55.32, stdev=43.71 clat percentiles (msec): | 1.00th=[ 15], 5.00th=[ 20], 10.00th=[ 23], 20.00th=[ 27], | 30.00th=[ 32], 40.00th=[ 36], 50.00th=[ 42], 60.00th=[ 50], | 70.00th=[ 63], 80.00th=[ 83], 90.00th=[ 106], 95.00th=[ 127], | 99.00th=[ 188], 99.50th=[ 232], 99.90th=[ 368], 99.95th=[ 944], | 99.99th=[ 944] bw ( KiB/s): min= 7, max= 127, per=24.86%, avg=43.01, stdev=26.68, samples=284 iops : min= 1, max= 31, avg=10.12, stdev= 6.71, samples=284 lat (msec) : 10=3.03%, 20=18.23%, 50=47.14%, 100=22.27%, 250=9.15% lat (msec) : 500=0.16%, 1000=0.03% cpu : usr=0.06%, sys=1.86%, ctx=4741, 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=179655: Fri Aug 21 23:52:10 2026 read: IOPS=10, BW=41.8KiB/s (42.8kB/s)(6052KiB/144824msec) clat (msec): min=5, max=301, avg=37.57, stdev=34.25 lat (msec): min=5, max=301, avg=37.57, stdev=34.25 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 26], 60.00th=[ 31], | 70.00th=[ 41], 80.00th=[ 55], 90.00th=[ 81], 95.00th=[ 109], | 99.00th=[ 163], 99.50th=[ 188], 99.90th=[ 300], 99.95th=[ 300], | 99.99th=[ 300] bw ( KiB/s): min= 7, max= 144, per=25.74%, avg=42.46, stdev=27.96, samples=278 iops : min= 1, max= 36, avg= 9.98, stdev= 7.04, samples=278 write: IOPS=10, BW=43.1KiB/s (44.1kB/s)(6236KiB/144824msec); 0 zone resets clat (msec): min=8, max=942, avg=56.16, stdev=45.21 lat (msec): min=8, max=942, avg=56.16, stdev=45.21 clat percentiles (msec): | 1.00th=[ 16], 5.00th=[ 20], 10.00th=[ 23], 20.00th=[ 27], | 30.00th=[ 32], 40.00th=[ 35], 50.00th=[ 42], 60.00th=[ 51], | 70.00th=[ 64], 80.00th=[ 82], 90.00th=[ 108], 95.00th=[ 133], | 99.00th=[ 194], 99.50th=[ 230], 99.90th=[ 326], 99.95th=[ 944], | 99.99th=[ 944] bw ( KiB/s): min= 7, max= 135, per=24.78%, avg=42.86, stdev=25.70, samples=283 iops : min= 1, max= 33, avg=10.08, stdev= 6.45, samples=283 lat (msec) : 10=2.99%, 20=18.07%, 50=47.49%, 100=22.14%, 250=9.08% lat (msec) : 500=0.20%, 1000=0.03% cpu : usr=0.06%, sys=1.93%, ctx=4724, 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=165KiB/s (169kB/s), 40.0KiB/s-41.8KiB/s (41.9kB/s-42.8kB/s), io=23.4MiB (24.6MB), run=144824-145117msec WRITE: bw=173KiB/s (177kB/s), 43.1KiB/s-43.8KiB/s (44.1kB/s-44.8kB/s), io=24.6MiB (25.7MB), run=144824-145117msec 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=179700: Fri Aug 21 23:52:51 2026 read: IOPS=12, BW=203KiB/s (208kB/s)(5920KiB/29179msec) clat (usec): min=41, max=202419, avg=40729.56, stdev=28229.94 lat (usec): min=41, max=202420, avg=40742.32, stdev=28213.90 clat percentiles (usec): | 1.00th=[ 49], 5.00th=[ 63], 10.00th=[ 82], 20.00th=[ 19530], | 30.00th=[ 25297], 40.00th=[ 29754], 50.00th=[ 36439], 60.00th=[ 44827], | 70.00th=[ 53216], 80.00th=[ 61604], 90.00th=[ 74974], 95.00th=[ 83362], | 99.00th=[127402], 99.50th=[166724], 99.90th=[202376], 99.95th=[202376], | 99.99th=[202376] bw ( KiB/s): min= 31, max= 446, per=25.16%, avg=201.30, stdev=73.66, samples=57 iops : min= 1, max= 27, avg=11.79, stdev= 4.61, samples=57 write: IOPS=13, BW=218KiB/s (223kB/s)(6368KiB/29179msec); 0 zone resets clat (usec): min=1362, max=317834, avg=35358.55, stdev=36523.62 lat (usec): min=1364, max=317836, avg=35364.21, stdev=36525.80 clat percentiles (usec): | 1.00th=[ 1647], 5.00th=[ 2474], 10.00th=[ 3458], 20.00th=[ 6194], | 30.00th=[ 9372], 40.00th=[ 16319], 50.00th=[ 28181], 60.00th=[ 36963], | 70.00th=[ 44303], 80.00th=[ 57410], 90.00th=[ 78119], 95.00th=[ 95945], | 99.00th=[189793], 99.50th=[258999], 99.90th=[316670], 99.95th=[316670], | 99.99th=[316670] bw ( KiB/s): min= 62, max= 414, per=25.83%, avg=217.49, stdev=84.50, samples=57 iops : min= 3, max= 25, avg=12.82, stdev= 5.33, samples=57 lat (usec) : 50=0.65%, 100=4.43%, 250=0.39%, 750=0.26% lat (msec) : 2=1.43%, 4=5.34%, 10=9.64%, 20=10.42%, 50=37.63% lat (msec) : 100=26.82%, 250=2.73%, 500=0.26% cpu : usr=0.06%, sys=5.52%, ctx=1653, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179701: Fri Aug 21 23:52:51 2026 read: IOPS=11, BW=192KiB/s (197kB/s)(5744KiB/29919msec) clat (usec): min=39, max=156157, avg=42968.69, stdev=27088.93 lat (usec): min=40, max=156159, avg=42969.69, stdev=27088.95 clat percentiles (usec): | 1.00th=[ 49], 5.00th=[ 62], 10.00th=[ 594], 20.00th=[ 21627], | 30.00th=[ 27395], 40.00th=[ 33817], 50.00th=[ 38536], 60.00th=[ 46924], | 70.00th=[ 56361], 80.00th=[ 66847], 90.00th=[ 76022], 95.00th=[ 87557], | 99.00th=[123208], 99.50th=[141558], 99.90th=[156238], 99.95th=[156238], | 99.99th=[156238] bw ( KiB/s): min= 30, max= 350, per=24.01%, avg=192.08, stdev=72.16, samples=59 iops : min= 1, max= 21, avg=11.22, stdev= 4.56, samples=59 write: IOPS=13, BW=219KiB/s (224kB/s)(6544KiB/29919msec); 0 zone resets clat (usec): min=1347, max=319707, avg=35160.10, stdev=36872.13 lat (usec): min=1349, max=319708, avg=35161.98, stdev=36872.18 clat percentiles (usec): | 1.00th=[ 1631], 5.00th=[ 1795], 10.00th=[ 2474], 20.00th=[ 5407], | 30.00th=[ 8979], 40.00th=[ 15139], 50.00th=[ 24249], 60.00th=[ 34341], | 70.00th=[ 46400], 80.00th=[ 60556], 90.00th=[ 82314], 95.00th=[102237], | 99.00th=[145753], 99.50th=[208667], 99.90th=[320865], 99.95th=[320865], | 99.99th=[320865] bw ( KiB/s): min= 62, max= 376, per=25.87%, avg=217.83, stdev=81.46, samples=59 iops : min= 3, max= 23, avg=12.85, stdev= 5.18, samples=59 lat (usec) : 50=0.65%, 100=3.12%, 250=0.78%, 750=0.13%, 1000=0.26% lat (msec) : 2=3.78%, 4=3.91%, 10=9.51%, 20=9.77%, 50=37.50% lat (msec) : 100=26.17%, 250=4.30%, 500=0.13% cpu : usr=0.08%, sys=5.76%, ctx=1678, 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=179702: Fri Aug 21 23:52:51 2026 read: IOPS=13, BW=216KiB/s (221kB/s)(6256KiB/28923msec) clat (usec): min=46, max=140469, avg=40731.37, stdev=25544.63 lat (usec): min=47, max=140470, avg=40737.44, stdev=25549.11 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 60], 10.00th=[ 86], 20.00th=[ 21365], | 30.00th=[ 27132], 40.00th=[ 34341], 50.00th=[ 38536], 60.00th=[ 45351], | 70.00th=[ 52167], 80.00th=[ 61604], 90.00th=[ 72877], 95.00th=[ 83362], | 99.00th=[117965], 99.50th=[128451], 99.90th=[139461], 99.95th=[139461], | 99.99th=[139461] bw ( KiB/s): min= 63, max= 382, per=27.06%, avg=216.51, stdev=77.78, samples=57 iops : min= 3, max= 23, avg=12.75, stdev= 4.89, samples=57 write: IOPS=13, BW=209KiB/s (214kB/s)(6032KiB/28923msec); 0 zone resets clat (usec): min=1434, max=321541, avg=34245.66, stdev=36561.08 lat (usec): min=1436, max=321543, avg=34258.76, stdev=36551.39 clat percentiles (usec): | 1.00th=[ 1483], 5.00th=[ 1876], 10.00th=[ 2540], 20.00th=[ 5407], | 30.00th=[ 10028], 40.00th=[ 17433], 50.00th=[ 25560], 60.00th=[ 33424], | 70.00th=[ 43254], 80.00th=[ 57410], 90.00th=[ 76022], 95.00th=[ 90702], | 99.00th=[130548], 99.50th=[308282], 99.90th=[320865], 99.95th=[320865], | 99.99th=[320865] bw ( KiB/s): min= 63, max= 383, per=24.53%, avg=206.56, stdev=78.70, samples=57 iops : min= 3, max= 23, avg=12.12, stdev= 4.97, samples=57 lat (usec) : 50=0.26%, 100=5.08%, 250=0.52%, 500=0.26%, 750=0.13% lat (usec) : 1000=0.13% lat (msec) : 2=3.26%, 4=5.21%, 10=6.51%, 20=8.46%, 50=40.36% lat (msec) : 100=27.21%, 250=2.34%, 500=0.26% cpu : usr=0.10%, sys=6.07%, ctx=1684, 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=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=179703: Fri Aug 21 23:52:51 2026 read: IOPS=13, BW=216KiB/s (221kB/s)(6032KiB/27897msec) clat (usec): min=42, max=206842, avg=39312.88, stdev=30183.66 lat (usec): min=42, max=206844, avg=39313.98, stdev=30183.69 clat percentiles (usec): | 1.00th=[ 53], 5.00th=[ 59], 10.00th=[ 70], 20.00th=[ 19530], | 30.00th=[ 25035], 40.00th=[ 28967], 50.00th=[ 33817], 60.00th=[ 39584], | 70.00th=[ 47449], 80.00th=[ 57410], 90.00th=[ 78119], 95.00th=[ 93848], | 99.00th=[154141], 99.50th=[196084], 99.90th=[206570], 99.95th=[206570], | 99.99th=[206570] bw ( KiB/s): min= 63, max= 414, per=26.96%, avg=215.69, stdev=85.72, samples=55 iops : min= 3, max= 25, avg=12.69, stdev= 5.36, samples=55 write: IOPS=14, BW=224KiB/s (230kB/s)(6256KiB/27897msec); 0 zone resets clat (usec): min=1310, max=155362, avg=33368.33, stdev=33588.60 lat (usec): min=1311, max=155364, avg=33370.27, stdev=33588.65 clat percentiles (usec): | 1.00th=[ 1483], 5.00th=[ 1795], 10.00th=[ 2474], 20.00th=[ 5276], | 30.00th=[ 8225], 40.00th=[ 13173], 50.00th=[ 22938], 60.00th=[ 31589], | 70.00th=[ 41681], 80.00th=[ 56361], 90.00th=[ 87557], 95.00th=[110625], | 99.00th=[133694], 99.50th=[145753], 99.90th=[156238], 99.95th=[156238], | 99.99th=[156238] bw ( KiB/s): min= 63, max= 414, per=26.63%, avg=224.22, stdev=77.19, samples=55 iops : min= 3, max= 25, avg=13.24, stdev= 4.91, samples=55 lat (usec) : 50=0.13%, 100=5.60%, 250=0.52%, 750=0.13% lat (msec) : 2=3.78%, 4=4.43%, 10=9.38%, 20=10.29%, 50=41.28% lat (msec) : 100=18.88%, 250=5.60% cpu : usr=0.08%, sys=6.32%, ctx=1696, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=801KiB/s (820kB/s), 192KiB/s-216KiB/s (197kB/s-221kB/s), io=23.4MiB (24.5MB), run=27897-29919msec WRITE: bw=842KiB/s (862kB/s), 209KiB/s-224KiB/s (214kB/s-230kB/s), io=24.6MiB (25.8MB), run=27897-29919msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179695: Fri Aug 21 23:53:03 2026 read: IOPS=8, BW=137KiB/s (141kB/s)(5920KiB/43144msec) clat (msec): min=7, max=224, avg=45.91, stdev=33.76 lat (msec): min=7, max=224, avg=45.91, stdev=33.76 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 14], 10.00th=[ 17], 20.00th=[ 23], | 30.00th=[ 28], 40.00th=[ 31], 50.00th=[ 36], 60.00th=[ 43], | 70.00th=[ 50], 80.00th=[ 59], 90.00th=[ 92], 95.00th=[ 118], | 99.00th=[ 182], 99.50th=[ 190], 99.90th=[ 226], 99.95th=[ 226], | 99.99th=[ 226] bw ( KiB/s): min= 31, max= 352, per=24.73%, avg=137.27, stdev=74.11, samples=84 iops : min= 1, max= 22, avg= 7.82, stdev= 4.72, samples=84 write: IOPS=9, BW=148KiB/s (151kB/s)(6368KiB/43144msec); 0 zone resets clat (msec): min=12, max=400, avg=65.28, stdev=44.51 lat (msec): min=12, max=400, avg=65.28, stdev=44.51 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 22], 10.00th=[ 27], 20.00th=[ 33], | 30.00th=[ 39], 40.00th=[ 45], 50.00th=[ 51], 60.00th=[ 61], | 70.00th=[ 73], 80.00th=[ 90], 90.00th=[ 128], 95.00th=[ 153], | 99.00th=[ 201], 99.50th=[ 257], 99.90th=[ 401], 99.95th=[ 401], | 99.99th=[ 401] bw ( KiB/s): min= 31, max= 349, per=25.38%, avg=148.21, stdev=68.63, samples=84 iops : min= 1, max= 21, avg= 8.51, stdev= 4.33, samples=84 lat (msec) : 10=1.43%, 20=6.51%, 50=51.56%, 100=27.99%, 250=12.24% lat (msec) : 500=0.26% cpu : usr=0.04%, sys=1.90%, ctx=1294, 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=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=179696: Fri Aug 21 23:53:03 2026 read: IOPS=8, BW=135KiB/s (138kB/s)(5744KiB/42635msec) clat (msec): min=6, max=352, avg=46.43, stdev=39.56 lat (msec): min=6, max=352, avg=46.43, stdev=39.56 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 14], 10.00th=[ 20], 20.00th=[ 23], | 30.00th=[ 27], 40.00th=[ 31], 50.00th=[ 36], 60.00th=[ 41], | 70.00th=[ 48], 80.00th=[ 60], 90.00th=[ 89], 95.00th=[ 120], | 99.00th=[ 224], 99.50th=[ 309], 99.90th=[ 351], 99.95th=[ 351], | 99.99th=[ 351] bw ( KiB/s): min= 31, max= 347, per=24.95%, avg=138.46, stdev=73.98, samples=81 iops : min= 1, max= 21, avg= 7.88, stdev= 4.67, samples=81 write: IOPS=9, BW=153KiB/s (157kB/s)(6544KiB/42635msec); 0 zone resets clat (msec): min=14, max=227, avg=63.01, stdev=36.45 lat (msec): min=14, max=227, avg=63.01, stdev=36.45 clat percentiles (msec): | 1.00th=[ 20], 5.00th=[ 25], 10.00th=[ 28], 20.00th=[ 34], | 30.00th=[ 40], 40.00th=[ 45], 50.00th=[ 52], 60.00th=[ 59], | 70.00th=[ 72], 80.00th=[ 95], 90.00th=[ 117], 95.00th=[ 134], | 99.00th=[ 184], 99.50th=[ 194], 99.90th=[ 228], 99.95th=[ 228], | 99.99th=[ 228] bw ( KiB/s): min= 31, max= 319, per=26.08%, avg=152.30, stdev=71.01, samples=84 iops : min= 1, max= 19, avg= 8.76, stdev= 4.45, samples=84 lat (msec) : 10=0.78%, 20=5.73%, 50=52.60%, 100=28.65%, 250=11.98% lat (msec) : 500=0.26% cpu : usr=0.04%, sys=1.93%, ctx=1287, majf=0, minf=10 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=359,409,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179697: Fri Aug 21 23:53:03 2026 read: IOPS=9, BW=145KiB/s (149kB/s)(6256KiB/43051msec) clat (msec): min=6, max=296, avg=47.46, stdev=38.61 lat (msec): min=6, max=296, avg=47.46, stdev=38.61 clat percentiles (msec): | 1.00th=[ 11], 5.00th=[ 16], 10.00th=[ 18], 20.00th=[ 22], | 30.00th=[ 27], 40.00th=[ 32], 50.00th=[ 35], 60.00th=[ 41], | 70.00th=[ 50], 80.00th=[ 63], 90.00th=[ 100], 95.00th=[ 130], | 99.00th=[ 180], 99.50th=[ 292], 99.90th=[ 296], 99.95th=[ 296], | 99.99th=[ 296] bw ( KiB/s): min= 31, max= 437, per=26.18%, avg=145.31, stdev=88.29, samples=85 iops : min= 1, max= 27, avg= 8.33, stdev= 5.62, samples=85 write: IOPS=8, BW=140KiB/s (143kB/s)(6032KiB/43051msec); 0 zone resets clat (msec): min=14, max=405, avg=64.36, stdev=43.16 lat (msec): min=14, max=405, avg=64.37, stdev=43.16 clat percentiles (msec): | 1.00th=[ 20], 5.00th=[ 24], 10.00th=[ 28], 20.00th=[ 33], | 30.00th=[ 39], 40.00th=[ 45], 50.00th=[ 51], 60.00th=[ 62], | 70.00th=[ 75], 80.00th=[ 88], 90.00th=[ 118], 95.00th=[ 148], | 99.00th=[ 226], 99.50th=[ 251], 99.90th=[ 405], 99.95th=[ 405], | 99.99th=[ 405] bw ( KiB/s): min= 31, max= 317, per=24.31%, avg=141.98, stdev=66.84, samples=83 iops : min= 1, max= 19, avg= 8.12, stdev= 4.25, samples=83 lat (msec) : 10=0.39%, 20=8.72%, 50=51.43%, 100=27.21%, 250=11.72% lat (msec) : 500=0.52% cpu : usr=0.04%, sys=1.78%, ctx=1246, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179698: Fri Aug 21 23:53:03 2026 read: IOPS=8, BW=142KiB/s (145kB/s)(6032KiB/42524msec) clat (msec): min=5, max=351, avg=46.40, stdev=38.63 lat (msec): min=5, max=351, avg=46.40, stdev=38.63 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 16], 10.00th=[ 18], 20.00th=[ 23], | 30.00th=[ 27], 40.00th=[ 32], 50.00th=[ 35], 60.00th=[ 41], | 70.00th=[ 48], 80.00th=[ 61], 90.00th=[ 87], 95.00th=[ 117], | 99.00th=[ 192], 99.50th=[ 296], 99.90th=[ 351], 99.95th=[ 351], | 99.99th=[ 351] bw ( KiB/s): min= 31, max= 319, per=25.34%, avg=140.63, stdev=71.27, samples=84 iops : min= 1, max= 19, avg= 8.02, stdev= 4.47, samples=84 write: IOPS=9, BW=147KiB/s (151kB/s)(6256KiB/42524msec); 0 zone resets clat (msec): min=13, max=354, avg=63.88, stdev=38.10 lat (msec): min=13, max=354, avg=63.88, stdev=38.10 clat percentiles (msec): | 1.00th=[ 21], 5.00th=[ 25], 10.00th=[ 30], 20.00th=[ 35], | 30.00th=[ 40], 40.00th=[ 46], 50.00th=[ 53], 60.00th=[ 63], | 70.00th=[ 73], 80.00th=[ 91], 90.00th=[ 112], 95.00th=[ 140], | 99.00th=[ 165], 99.50th=[ 253], 99.90th=[ 355], 99.95th=[ 355], | 99.99th=[ 355] bw ( KiB/s): min= 31, max= 380, per=25.18%, avg=147.05, stdev=72.13, samples=84 iops : min= 1, max= 23, avg= 8.43, stdev= 4.62, samples=84 lat (msec) : 10=0.52%, 20=6.77%, 50=52.86%, 100=28.39%, 250=10.81% lat (msec) : 500=0.65% cpu : usr=0.04%, sys=1.90%, ctx=1256, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=555KiB/s (568kB/s), 135KiB/s-145KiB/s (138kB/s-149kB/s), io=23.4MiB (24.5MB), run=42524-43144msec WRITE: bw=584KiB/s (598kB/s), 140KiB/s-153KiB/s (143kB/s-157kB/s), io=24.6MiB (25.8MB), run=42524-43144msec 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=179719: Fri Aug 21 23:53:19 2026 read: IOPS=1, BW=1358KiB/s (1390kB/s)(7168KiB/5280msec) clat (usec): min=1885, max=2787.7k, avg=537008.49, stdev=995970.01 lat (usec): min=1886, max=2787.7k, avg=537009.83, stdev=995970.00 clat percentiles (usec): | 1.00th=[ 1893], 5.00th=[ 1893], 10.00th=[ 1893], | 20.00th=[ 120062], 30.00th=[ 183501], 40.00th=[ 183501], | 50.00th=[ 193987], 60.00th=[ 202376], 70.00th=[ 202376], | 80.00th=[ 267387], 90.00th=[2801796], 95.00th=[2801796], | 99.00th=[2801796], 99.50th=[2801796], 99.90th=[2801796], | 99.95th=[2801796], 99.99th=[2801796] bw ( KiB/s): min= 1917, max= 4071, per=85.54%, avg=2711.75, stdev=992.66, samples=4 iops : min= 1, max= 3, avg= 1.75, stdev= 0.96, samples=4 write: IOPS=0, BW=970KiB/s (993kB/s)(5120KiB/5280msec); 0 zone resets clat (msec): min=161, max=497, avg=290.23, stdev=125.93 lat (msec): min=161, max=497, avg=290.30, stdev=125.93 clat percentiles (msec): | 1.00th=[ 163], 5.00th=[ 163], 10.00th=[ 163], 20.00th=[ 163], | 30.00th=[ 228], 40.00th=[ 228], 50.00th=[ 284], 60.00th=[ 284], | 70.00th=[ 284], 80.00th=[ 284], 90.00th=[ 498], 95.00th=[ 498], | 99.00th=[ 498], 99.50th=[ 498], 99.90th=[ 498], 99.95th=[ 498], | 99.99th=[ 498] bw ( KiB/s): min= 2031, max= 4063, per=61.06%, avg=2709.67, stdev=1172.02, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 lat (msec) : 2=8.33%, 250=50.00%, 500=33.33%, >=2000=8.33% cpu : usr=0.00%, sys=12.54%, ctx=689, 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=179720: Fri Aug 21 23:53:19 2026 read: IOPS=0, BW=317KiB/s (325kB/s)(2048KiB/6460msec) clat (usec): min=1568, max=251256, avg=126412.26, stdev=176556.38 lat (usec): min=1569, max=251258, avg=126414.08, stdev=176557.18 clat percentiles (usec): | 1.00th=[ 1565], 5.00th=[ 1565], 10.00th=[ 1565], 20.00th=[ 1565], | 30.00th=[ 1565], 40.00th=[ 1565], 50.00th=[ 1565], 60.00th=[250610], | 70.00th=[250610], 80.00th=[250610], 90.00th=[250610], 95.00th=[250610], | 99.00th=[250610], 99.50th=[250610], 99.90th=[250610], 99.95th=[250610], | 99.99th=[250610] bw ( KiB/s): min= 1416, max= 2031, per=54.37%, avg=1723.50, stdev=434.87, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1585KiB/s (1623kB/s)(10.0MiB/6460msec); 0 zone resets clat (msec): min=69, max=3163, avg=612.08, stdev=922.84 lat (msec): min=69, max=3163, avg=612.23, stdev=922.81 clat percentiles (msec): | 1.00th=[ 70], 5.00th=[ 70], 10.00th=[ 70], 20.00th=[ 101], | 30.00th=[ 176], 40.00th=[ 194], 50.00th=[ 255], 60.00th=[ 296], | 70.00th=[ 567], 80.00th=[ 642], 90.00th=[ 659], 95.00th=[ 3171], | 99.00th=[ 3171], 99.50th=[ 3171], 99.90th=[ 3171], 99.95th=[ 3171], | 99.99th=[ 3171] bw ( KiB/s): min= 1917, max= 6023, per=81.81%, avg=3630.80, stdev=1706.14, samples=5 iops : min= 1, max= 5, avg= 2.80, stdev= 1.79, samples=5 lat (msec) : 2=8.33%, 100=8.33%, 250=25.00%, 500=25.00%, 750=25.00% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=10.71%, ctx=108, 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=179721: Fri Aug 21 23:53:19 2026 read: IOPS=1, BW=1085KiB/s (1111kB/s)(6144KiB/5663msec) clat (usec): min=475, max=286940, avg=145203.34, stdev=119781.08 lat (usec): min=476, max=286941, avg=145204.34, stdev=119780.93 clat percentiles (usec): | 1.00th=[ 478], 5.00th=[ 478], 10.00th=[ 478], 20.00th=[ 1811], | 30.00th=[ 1811], 40.00th=[166724], 50.00th=[166724], 60.00th=[177210], | 70.00th=[238027], 80.00th=[238027], 90.00th=[287310], 95.00th=[287310], | 99.00th=[287310], 99.50th=[287310], 99.90th=[287310], 99.95th=[287310], | 99.99th=[287310] bw ( KiB/s): min= 1917, max= 6095, per=100.00%, avg=3347.67, stdev=2379.94, samples=3 iops : min= 1, max= 5, avg= 2.33, stdev= 2.31, samples=3 write: IOPS=1, BW=1085KiB/s (1111kB/s)(6144KiB/5663msec); 0 zone resets clat (msec): min=173, max=3192, avg=791.15, stdev=1187.23 lat (msec): min=173, max=3192, avg=791.21, stdev=1187.23 clat percentiles (msec): | 1.00th=[ 174], 5.00th=[ 174], 10.00th=[ 174], 20.00th=[ 236], | 30.00th=[ 236], 40.00th=[ 255], 50.00th=[ 255], 60.00th=[ 266], | 70.00th=[ 625], 80.00th=[ 625], 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= 2031, max= 2741, per=49.79%, avg=2209.50, stdev=354.34, samples=4 iops : min= 1, max= 2, avg= 1.25, stdev= 0.50, samples=4 lat (usec) : 500=8.33% lat (msec) : 2=8.33%, 250=41.67%, 500=25.00%, 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=8.12%, ctx=194, 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=179722: Fri Aug 21 23:53:19 2026 read: IOPS=0, BW=938KiB/s (961kB/s)(5120KiB/5457msec) clat (usec): min=305, max=103251, avg=21021.88, stdev=45967.75 lat (usec): min=305, max=103253, avg=21022.97, stdev=45968.20 clat percentiles (usec): | 1.00th=[ 306], 5.00th=[ 306], 10.00th=[ 306], 20.00th=[ 306], | 30.00th=[ 469], 40.00th=[ 469], 50.00th=[ 537], 60.00th=[ 537], | 70.00th=[ 545], 80.00th=[ 545], 90.00th=[103285], 95.00th=[103285], | 99.00th=[103285], 99.50th=[103285], 99.90th=[103285], 99.95th=[103285], | 99.99th=[103285] bw ( KiB/s): min= 8126, max= 8126, per=100.00%, avg=8126.00, stdev= 0.00, samples=1 iops : min= 7, max= 7, avg= 7.00, stdev= 0.00, samples=1 write: IOPS=1, BW=1314KiB/s (1345kB/s)(7168KiB/5457msec); 0 zone resets clat (msec): min=197, max=3164, avg=750.07, stdev=1073.71 lat (msec): min=198, max=3165, avg=750.55, stdev=1074.02 clat percentiles (msec): | 1.00th=[ 199], 5.00th=[ 199], 10.00th=[ 199], 20.00th=[ 234], | 30.00th=[ 268], 40.00th=[ 268], 50.00th=[ 342], 60.00th=[ 435], | 70.00th=[ 435], 80.00th=[ 609], 90.00th=[ 3171], 95.00th=[ 3171], | 99.00th=[ 3171], 99.50th=[ 3171], 99.90th=[ 3171], 99.95th=[ 3171], | 99.99th=[ 3171] bw ( KiB/s): min= 1426, max= 3835, per=51.19%, avg=2271.60, stdev=912.55, samples=5 iops : min= 1, max= 3, avg= 1.40, stdev= 0.89, samples=5 lat (usec) : 500=16.67%, 750=16.67% lat (msec) : 250=25.00%, 500=25.00%, 750=8.33%, >=2000=8.33% cpu : usr=0.02%, sys=9.31%, ctx=107, 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=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=3170KiB/s (3246kB/s), 317KiB/s-1358KiB/s (325kB/s-1390kB/s), io=20.0MiB (20.0MB), run=5280-6460msec WRITE: bw=4438KiB/s (4545kB/s), 970KiB/s-1585KiB/s (993kB/s-1623kB/s), io=28.0MiB (29.4MB), run=5280-6460msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179724: Fri Aug 21 23:53:20 2026 read: IOPS=1, BW=1167KiB/s (1195kB/s)(7168KiB/6142msec) clat (msec): min=83, max=3302, avg=606.09, stdev=1195.21 lat (msec): min=83, max=3302, avg=606.09, stdev=1195.21 clat percentiles (msec): | 1.00th=[ 84], 5.00th=[ 84], 10.00th=[ 84], 20.00th=[ 93], | 30.00th=[ 94], 40.00th=[ 94], 50.00th=[ 122], 60.00th=[ 125], | 70.00th=[ 125], 80.00th=[ 426], 90.00th=[ 3306], 95.00th=[ 3306], | 99.00th=[ 3306], 99.50th=[ 3306], 99.90th=[ 3306], 99.95th=[ 3306], | 99.99th=[ 3306] bw ( KiB/s): min= 1783, max= 4055, per=95.00%, avg=2947.75, stdev=1219.86, samples=4 iops : min= 1, max= 3, avg= 2.00, stdev= 1.15, samples=4 write: IOPS=0, BW=834KiB/s (854kB/s)(5120KiB/6142msec); 0 zone resets clat (msec): min=130, max=677, avg=367.27, stdev=198.61 lat (msec): min=130, max=677, avg=367.36, stdev=198.61 clat percentiles (msec): | 1.00th=[ 131], 5.00th=[ 131], 10.00th=[ 131], 20.00th=[ 131], | 30.00th=[ 296], 40.00th=[ 296], 50.00th=[ 363], 60.00th=[ 363], | 70.00th=[ 372], 80.00th=[ 372], 90.00th=[ 676], 95.00th=[ 676], | 99.00th=[ 676], 99.50th=[ 676], 99.90th=[ 676], 99.95th=[ 676], | 99.99th=[ 676] bw ( KiB/s): min= 2048, max= 4087, per=77.89%, avg=3383.33, stdev=1156.99, samples=3 iops : min= 2, max= 3, avg= 2.67, stdev= 0.58, samples=3 lat (msec) : 100=25.00%, 250=25.00%, 500=33.33%, 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=4.07%, 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=179725: Fri Aug 21 23:53:20 2026 read: IOPS=0, BW=323KiB/s (331kB/s)(2048KiB/6345msec) clat (msec): min=329, max=533, avg=431.45, stdev=144.57 lat (msec): min=329, max=533, avg=431.45, stdev=144.57 clat percentiles (msec): | 1.00th=[ 330], 5.00th=[ 330], 10.00th=[ 330], 20.00th=[ 330], | 30.00th=[ 330], 40.00th=[ 330], 50.00th=[ 330], 60.00th=[ 535], | 70.00th=[ 535], 80.00th=[ 535], 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= 1765, max= 2023, per=61.04%, avg=1894.00, stdev=182.43, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1614KiB/s (1653kB/s)(10.0MiB/6345msec); 0 zone resets clat (msec): min=92, max=2433, avg=538.08, stdev=682.88 lat (msec): min=92, max=2433, avg=538.17, stdev=682.88 clat percentiles (msec): | 1.00th=[ 92], 5.00th=[ 92], 10.00th=[ 92], 20.00th=[ 203], | 30.00th=[ 222], 40.00th=[ 300], 50.00th=[ 309], 60.00th=[ 342], | 70.00th=[ 347], 80.00th=[ 518], 90.00th=[ 617], 95.00th=[ 2433], | 99.00th=[ 2433], 99.50th=[ 2433], 99.90th=[ 2433], 99.95th=[ 2433], | 99.99th=[ 2433] bw ( KiB/s): min= 2027, max= 6023, per=69.51%, avg=3019.67, stdev=1657.65, samples=6 iops : min= 1, max= 5, avg= 2.17, stdev= 1.60, samples=6 lat (msec) : 100=8.33%, 250=16.67%, 500=41.67%, 750=25.00%, >=2000=8.33% cpu : usr=0.05%, sys=5.04%, ctx=104, 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=179726: Fri Aug 21 23:53:20 2026 read: IOPS=0, BW=987KiB/s (1011kB/s)(6144KiB/6225msec) clat (msec): min=85, max=344, avg=164.25, stdev=95.03 lat (msec): min=85, max=344, avg=164.26, stdev=95.03 clat percentiles (msec): | 1.00th=[ 86], 5.00th=[ 86], 10.00th=[ 86], 20.00th=[ 100], | 30.00th=[ 100], 40.00th=[ 133], 50.00th=[ 133], 60.00th=[ 138], | 70.00th=[ 186], 80.00th=[ 186], 90.00th=[ 347], 95.00th=[ 347], | 99.00th=[ 347], 99.50th=[ 347], 99.90th=[ 347], 99.95th=[ 347], | 99.99th=[ 347] bw ( KiB/s): min= 2007, max= 4087, per=81.93%, avg=2542.25, stdev=1029.97, samples=4 iops : min= 1, max= 3, avg= 1.75, stdev= 0.96, samples=4 write: IOPS=0, BW=987KiB/s (1011kB/s)(6144KiB/6225msec); 0 zone resets clat (msec): min=149, max=3020, avg=863.19, stdev=1094.00 lat (msec): min=149, max=3020, avg=863.61, stdev=1093.81 clat percentiles (msec): | 1.00th=[ 150], 5.00th=[ 150], 10.00th=[ 150], 20.00th=[ 309], | 30.00th=[ 309], 40.00th=[ 351], 50.00th=[ 351], 60.00th=[ 376], | 70.00th=[ 978], 80.00th=[ 978], 90.00th=[ 3037], 95.00th=[ 3037], | 99.00th=[ 3037], 99.50th=[ 3037], 99.90th=[ 3037], 99.95th=[ 3037], | 99.99th=[ 3037] bw ( KiB/s): min= 1805, max= 2048, per=45.63%, avg=1982.00, stdev=100.02, samples=5 iops : min= 1, max= 2, avg= 1.20, stdev= 0.45, samples=5 lat (msec) : 100=16.67%, 250=33.33%, 500=33.33%, 1000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=3.20%, ctx=88, 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=179727: Fri Aug 21 23:53:20 2026 read: IOPS=0, BW=776KiB/s (794kB/s)(5120KiB/6600msec) clat (msec): min=64, max=684, avg=358.72, stdev=266.94 lat (msec): min=64, max=684, avg=358.73, stdev=266.94 clat percentiles (msec): | 1.00th=[ 65], 5.00th=[ 65], 10.00th=[ 65], 20.00th=[ 65], | 30.00th=[ 176], 40.00th=[ 176], 50.00th=[ 284], 60.00th=[ 284], | 70.00th=[ 592], 80.00th=[ 592], 90.00th=[ 684], 95.00th=[ 684], | 99.00th=[ 684], 99.50th=[ 684], 99.90th=[ 684], 99.95th=[ 684], | 99.99th=[ 684] bw ( KiB/s): min= 2007, max= 4087, per=98.20%, avg=3047.00, stdev=1470.78, samples=2 iops : min= 1, max= 3, avg= 2.00, stdev= 1.41, samples=2 write: IOPS=1, BW=1086KiB/s (1112kB/s)(7168KiB/6600msec); 0 zone resets clat (msec): min=91, max=3208, avg=680.93, stdev=1128.26 lat (msec): min=91, max=3208, avg=681.03, stdev=1128.25 clat percentiles (msec): | 1.00th=[ 91], 5.00th=[ 91], 10.00th=[ 91], 20.00th=[ 103], | 30.00th=[ 116], 40.00th=[ 116], 50.00th=[ 300], 60.00th=[ 384], | 70.00th=[ 384], 80.00th=[ 558], 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= 1858, max= 4055, per=61.09%, avg=2653.67, stdev=1217.30, samples=3 iops : min= 1, max= 3, avg= 2.00, stdev= 1.00, samples=3 lat (msec) : 100=16.67%, 250=25.00%, 500=25.00%, 750=25.00%, >=2000=8.33% cpu : usr=0.02%, sys=2.82%, ctx=66, 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=3103KiB/s (3178kB/s), 323KiB/s-1167KiB/s (331kB/s-1195kB/s), io=20.0MiB (20.0MB), run=6142-6600msec WRITE: bw=4344KiB/s (4449kB/s), 834KiB/s-1614KiB/s (854kB/s-1653kB/s), io=28.0MiB (29.4MB), run=6142-6600msec 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=179739: Fri Aug 21 23:53:34 2026 read: IOPS=1, BW=5710KiB/s (5847kB/s)(12.0MiB/2152msec) clat (msec): min=559, max=767, avg=687.65, stdev=111.76 lat (msec): min=559, max=767, avg=687.65, stdev=111.76 clat percentiles (msec): | 1.00th=[ 558], 5.00th=[ 558], 10.00th=[ 558], 20.00th=[ 558], | 30.00th=[ 558], 40.00th=[ 735], 50.00th=[ 735], 60.00th=[ 735], | 70.00th=[ 768], 80.00th=[ 768], 90.00th=[ 768], 95.00th=[ 768], | 99.00th=[ 768], 99.50th=[ 768], 99.90th=[ 768], 99.95th=[ 768], | 99.99th=[ 768] bw ( KiB/s): min= 8094, max= 8159, per=100.00%, avg=8126.50, stdev=45.96, 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=13.53%, ctx=340, 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=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=179740: Fri Aug 21 23:53:34 2026 read: IOPS=0, BW=1348KiB/s (1381kB/s)(4096KiB/3038msec) clat (nsec): min=701461k, max=701461k, avg=701461314.00, stdev= 0.00 lat (nsec): min=701464k, max=701464k, avg=701464177.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 701], 5.00th=[ 701], 10.00th=[ 701], 20.00th=[ 701], | 30.00th=[ 701], 40.00th=[ 701], 50.00th=[ 701], 60.00th=[ 701], | 70.00th=[ 701], 80.00th=[ 701], 90.00th=[ 701], 95.00th=[ 701], | 99.00th=[ 701], 99.50th=[ 701], 99.90th=[ 701], 99.95th=[ 701], | 99.99th=[ 701] bw ( KiB/s): min= 8094, max= 8094, per=100.00%, avg=8094.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2697KiB/s (2761kB/s)(8192KiB/3038msec); 0 zone resets clat (msec): min=929, max=1347, avg=1138.38, stdev=295.58 lat (msec): min=931, max=1347, avg=1139.45, stdev=294.48 clat percentiles (msec): | 1.00th=[ 927], 5.00th=[ 927], 10.00th=[ 927], 20.00th=[ 927], | 30.00th=[ 927], 40.00th=[ 927], 50.00th=[ 927], 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= 8159, max= 8159, per=75.64%, avg=8159.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 750=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.03%, sys=8.53%, ctx=132, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1,2,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179741: Fri Aug 21 23:53:34 2026 write: IOPS=1, BW=4427KiB/s (4533kB/s)(12.0MiB/2776msec); 0 zone resets clat (msec): min=265, max=1188, avg=874.31, stdev=527.06 lat (msec): min=266, max=1189, avg=874.69, stdev=527.04 clat percentiles (msec): | 1.00th=[ 266], 5.00th=[ 266], 10.00th=[ 266], 20.00th=[ 266], | 30.00th=[ 266], 40.00th=[ 1167], 50.00th=[ 1167], 60.00th=[ 1167], | 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= 8143, max= 8159, per=75.57%, avg=8151.00, stdev=11.31, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 2000=66.67% cpu : usr=0.00%, sys=4.68%, ctx=54, 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=179742: Fri Aug 21 23:53:34 2026 write: IOPS=1, BW=5024KiB/s (5144kB/s)(12.0MiB/2446msec); 0 zone resets clat (msec): min=164, max=1107, avg=765.44, stdev=522.43 lat (msec): min=164, max=1108, avg=766.14, stdev=522.47 clat percentiles (msec): | 1.00th=[ 165], 5.00th=[ 165], 10.00th=[ 165], 20.00th=[ 165], | 30.00th=[ 165], 40.00th=[ 1028], 50.00th=[ 1028], 60.00th=[ 1028], | 70.00th=[ 1116], 80.00th=[ 1116], 90.00th=[ 1116], 95.00th=[ 1116], | 99.00th=[ 1116], 99.50th=[ 1116], 99.90th=[ 1116], 99.95th=[ 1116], | 99.99th=[ 1116] bw ( KiB/s): min= 8159, max= 8159, per=75.64%, avg=8159.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 250=33.33%, 2000=66.67% cpu : usr=0.00%, sys=4.42%, ctx=38, 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=5393KiB/s (5522kB/s), 1348KiB/s-5710KiB/s (1381kB/s-5847kB/s), io=16.0MiB (16.8MB), run=2152-3038msec WRITE: bw=10.5MiB/s (11.0MB/s), 2697KiB/s-5024KiB/s (2761kB/s-5144kB/s), io=32.0MiB (33.6MB), run=2446-3038msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179734: Fri Aug 21 23:53:34 2026 read: IOPS=1, BW=5306KiB/s (5433kB/s)(12.0MiB/2316msec) clat (msec): min=662, max=838, avg=740.22, stdev=89.47 lat (msec): min=662, max=838, avg=740.22, stdev=89.47 clat percentiles (msec): | 1.00th=[ 667], 5.00th=[ 667], 10.00th=[ 667], 20.00th=[ 667], | 30.00th=[ 667], 40.00th=[ 718], 50.00th=[ 718], 60.00th=[ 718], | 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= 8175, per=100.00%, avg=8126.50, stdev=68.59, 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=4.88%, ctx=70, majf=0, minf=9 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=179735: Fri Aug 21 23:53:34 2026 read: IOPS=0, BW=2742KiB/s (2807kB/s)(4096KiB/1494msec) clat (nsec): min=277099k, max=277099k, avg=277098871.00, stdev= 0.00 lat (nsec): min=277103k, max=277103k, avg=277103058.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 279], 5.00th=[ 279], 10.00th=[ 279], 20.00th=[ 279], | 30.00th=[ 279], 40.00th=[ 279], 50.00th=[ 279], 60.00th=[ 279], | 70.00th=[ 279], 80.00th=[ 279], 90.00th=[ 279], 95.00th=[ 279], | 99.00th=[ 279], 99.50th=[ 279], 99.90th=[ 279], 99.95th=[ 279], | 99.99th=[ 279] bw ( KiB/s): min= 6532, max= 6532, per=92.34%, avg=6532.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=1, BW=5483KiB/s (5615kB/s)(8192KiB/1494msec); 0 zone resets clat (msec): min=437, max=694, avg=566.31, stdev=181.91 lat (msec): min=437, max=695, avg=566.74, stdev=182.21 clat percentiles (msec): | 1.00th=[ 439], 5.00th=[ 439], 10.00th=[ 439], 20.00th=[ 439], | 30.00th=[ 439], 40.00th=[ 439], 50.00th=[ 439], 60.00th=[ 693], | 70.00th=[ 693], 80.00th=[ 693], 90.00th=[ 693], 95.00th=[ 693], | 99.00th=[ 693], 99.50th=[ 693], 99.90th=[ 693], 99.95th=[ 693], | 99.99th=[ 693] bw ( KiB/s): min= 8110, max= 8110, per=81.18%, avg=8110.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=66.67%, 750=33.33% cpu : usr=0.00%, sys=7.43%, ctx=54, 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=179736: Fri Aug 21 23:53:34 2026 write: IOPS=0, BW=3746KiB/s (3836kB/s)(12.0MiB/3280msec); 0 zone resets clat (msec): min=256, max=1978, avg=1027.62, stdev=875.24 lat (msec): min=256, max=1979, avg=1028.40, stdev=875.26 clat percentiles (msec): | 1.00th=[ 257], 5.00th=[ 257], 10.00th=[ 257], 20.00th=[ 257], | 30.00th=[ 257], 40.00th=[ 852], 50.00th=[ 852], 60.00th=[ 852], | 70.00th=[ 1972], 80.00th=[ 1972], 90.00th=[ 1972], 95.00th=[ 1972], | 99.00th=[ 1972], 99.50th=[ 1972], 99.90th=[ 1972], 99.95th=[ 1972], | 99.99th=[ 1972] bw ( KiB/s): min= 8143, max= 8159, per=81.59%, avg=8151.00, stdev=11.31, 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=3.93%, 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=179737: Fri Aug 21 23:53:34 2026 write: IOPS=1, BW=5042KiB/s (5163kB/s)(12.0MiB/2437msec); 0 zone resets clat (msec): min=296, max=1528, avg=782.96, stdev=655.61 lat (msec): min=296, max=1528, avg=783.42, stdev=655.50 clat percentiles (msec): | 1.00th=[ 296], 5.00th=[ 296], 10.00th=[ 296], 20.00th=[ 296], | 30.00th=[ 296], 40.00th=[ 523], 50.00th=[ 523], 60.00th=[ 523], | 70.00th=[ 1536], 80.00th=[ 1536], 90.00th=[ 1536], 95.00th=[ 1536], | 99.00th=[ 1536], 99.50th=[ 1536], 99.90th=[ 1536], 99.95th=[ 1536], | 99.99th=[ 1536] bw ( KiB/s): min= 5785, max= 8110, per=69.54%, avg=6947.50, stdev=1644.02, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 750=33.33%, 2000=33.33% cpu : usr=0.04%, sys=5.09%, ctx=56, 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=7074KiB/s (7244kB/s), 2742KiB/s-5306KiB/s (2807kB/s-5433kB/s), io=16.0MiB (16.8MB), run=1494-2316msec WRITE: bw=9990KiB/s (10.2MB/s), 3746KiB/s-5483KiB/s (3836kB/s-5615kB/s), io=32.0MiB (33.6MB), run=1494-3280msec