== sanity test 398b: DIO and buffer IO race ============== 01:21:19 (1788672079) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 5.2357 s, 9.6 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=180383: Sun Sep 6 01:23:36 2026 read: IOPS=12, BW=50.3KiB/s (51.5kB/s)(5992KiB/119152msec) clat (usec): min=45, max=758290, avg=43520.55, stdev=34367.47 lat (usec): min=46, max=758293, avg=43522.05, stdev=34367.48 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 7570], 10.00th=[ 15533], 20.00th=[ 21627], | 30.00th=[ 26608], 40.00th=[ 31327], 50.00th=[ 36963], 60.00th=[ 42730], | 70.00th=[ 51119], 80.00th=[ 61080], 90.00th=[ 80217], 95.00th=[ 95945], | 99.00th=[156238], 99.50th=[177210], 99.90th=[244319], 99.95th=[759170], | 99.99th=[759170] bw ( KiB/s): min= 7, max= 104, per=24.78%, avg=49.80, stdev=19.45, samples=234 iops : min= 1, max= 26, avg=11.79, stdev= 4.89, samples=234 write: IOPS=13, BW=52.8KiB/s (54.1kB/s)(6296KiB/119152msec); 0 zone resets clat (usec): min=979, max=214115, avg=34165.65, stdev=34944.24 lat (usec): min=980, max=214116, avg=34168.81, stdev=34945.83 clat percentiles (usec): | 1.00th=[ 1106], 5.00th=[ 1336], 10.00th=[ 1860], 20.00th=[ 4228], | 30.00th=[ 8029], 40.00th=[ 16909], 50.00th=[ 24249], 60.00th=[ 33162], | 70.00th=[ 43779], 80.00th=[ 57934], 90.00th=[ 83362], 95.00th=[100140], | 99.00th=[158335], 99.50th=[179307], 99.90th=[210764], 99.95th=[214959], | 99.99th=[214959] bw ( KiB/s): min= 7, max= 151, per=24.99%, avg=52.47, stdev=22.43, samples=234 iops : min= 1, max= 37, avg=12.47, stdev= 5.65, samples=234 lat (usec) : 50=0.20%, 100=1.56%, 250=0.20%, 500=0.07%, 750=0.07% lat (usec) : 1000=0.20% lat (msec) : 2=5.47%, 4=4.30%, 10=7.36%, 20=11.49%, 50=41.21% lat (msec) : 100=22.98%, 250=4.88%, 1000=0.03% cpu : usr=0.07%, sys=5.48%, ctx=6816, 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=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=180384: Sun Sep 6 01:23:36 2026 read: IOPS=12, BW=50.0KiB/s (51.2kB/s)(5940KiB/118765msec) clat (usec): min=42, max=501708, avg=42900.67, stdev=29583.05 lat (usec): min=43, max=501709, avg=42904.90, stdev=29583.29 clat percentiles (usec): | 1.00th=[ 54], 5.00th=[ 11863], 10.00th=[ 16712], 20.00th=[ 21890], | 30.00th=[ 26870], 40.00th=[ 30802], 50.00th=[ 37487], 60.00th=[ 43254], | 70.00th=[ 51643], 80.00th=[ 60031], 90.00th=[ 76022], 95.00th=[ 91751], | 99.00th=[143655], 99.50th=[166724], 99.90th=[210764], 99.95th=[501220], | 99.99th=[501220] bw ( KiB/s): min= 7, max= 111, per=24.71%, avg=49.66, stdev=18.92, samples=234 iops : min= 1, max= 27, avg=11.76, stdev= 4.78, samples=234 write: IOPS=13, BW=53.4KiB/s (54.7kB/s)(6348KiB/118765msec); 0 zone resets clat (usec): min=879, max=369124, avg=34588.07, stdev=35930.51 lat (usec): min=880, max=369126, avg=34590.89, stdev=35931.23 clat percentiles (usec): | 1.00th=[ 1074], 5.00th=[ 1237], 10.00th=[ 1876], 20.00th=[ 3916], | 30.00th=[ 7635], 40.00th=[ 17433], 50.00th=[ 25822], 60.00th=[ 33162], | 70.00th=[ 43254], 80.00th=[ 60031], 90.00th=[ 82314], 95.00th=[104334], | 99.00th=[149947], 99.50th=[168821], 99.90th=[265290], 99.95th=[371196], | 99.99th=[371196] bw ( KiB/s): min= 15, max= 119, per=25.30%, avg=53.13, stdev=21.81, samples=234 iops : min= 3, max= 29, avg=12.64, stdev= 5.48, samples=234 lat (usec) : 50=0.13%, 100=1.50%, 250=0.10%, 750=0.03%, 1000=0.10% lat (msec) : 2=5.60%, 4=5.01%, 10=6.67%, 20=11.07%, 50=41.60% lat (msec) : 100=23.47%, 250=4.62%, 500=0.07%, 750=0.03% cpu : usr=0.07%, sys=5.37%, ctx=6748, majf=0, minf=19 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=180385: Sun Sep 6 01:23:36 2026 read: IOPS=12, BW=51.5KiB/s (52.7kB/s)(6028KiB/117130msec) clat (usec): min=40, max=232092, avg=42552.72, stdev=28859.11 lat (usec): min=40, max=232093, avg=42554.21, stdev=28859.39 clat percentiles (usec): | 1.00th=[ 57], 5.00th=[ 10683], 10.00th=[ 15926], 20.00th=[ 21103], | 30.00th=[ 26346], 40.00th=[ 31589], 50.00th=[ 36439], 60.00th=[ 42206], | 70.00th=[ 49546], 80.00th=[ 58459], 90.00th=[ 79168], 95.00th=[ 96994], | 99.00th=[141558], 99.50th=[166724], 99.90th=[223347], 99.95th=[231736], | 99.99th=[231736] bw ( KiB/s): min= 7, max= 109, per=25.47%, avg=51.20, stdev=18.93, samples=230 iops : min= 1, max= 27, avg=12.15, stdev= 4.76, samples=230 write: IOPS=13, BW=53.4KiB/s (54.7kB/s)(6260KiB/117130msec); 0 zone resets clat (usec): min=955, max=522713, avg=33745.01, stdev=36917.56 lat (usec): min=955, max=522715, avg=33749.58, stdev=36921.91 clat percentiles (usec): | 1.00th=[ 1106], 5.00th=[ 1352], 10.00th=[ 1926], 20.00th=[ 3720], | 30.00th=[ 6849], 40.00th=[ 15795], 50.00th=[ 24511], 60.00th=[ 32375], | 70.00th=[ 42730], 80.00th=[ 56886], 90.00th=[ 82314], 95.00th=[101188], | 99.00th=[145753], 99.50th=[191890], 99.90th=[299893], 99.95th=[522191], | 99.99th=[522191] bw ( KiB/s): min= 7, max= 143, per=25.33%, avg=53.18, stdev=23.38, samples=230 iops : min= 1, max= 35, avg=12.65, stdev= 5.89, samples=230 lat (usec) : 50=0.20%, 100=1.27%, 250=0.36%, 500=0.13%, 750=0.13% lat (usec) : 1000=0.07% lat (msec) : 2=5.34%, 4=5.66%, 10=6.77%, 20=10.94%, 50=42.32% lat (msec) : 100=21.91%, 250=4.82%, 500=0.07%, 750=0.03% cpu : usr=0.07%, sys=5.52%, ctx=6788, 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=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=180386: Sun Sep 6 01:23:36 2026 read: IOPS=12, BW=50.7KiB/s (51.9kB/s)(6052KiB/119430msec) clat (usec): min=35, max=199207, avg=42778.51, stdev=28507.14 lat (usec): min=35, max=199209, avg=42779.97, stdev=28507.67 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 9634], 10.00th=[ 16909], 20.00th=[ 22152], | 30.00th=[ 26870], 40.00th=[ 31589], 50.00th=[ 36439], 60.00th=[ 42206], | 70.00th=[ 49546], 80.00th=[ 59507], 90.00th=[ 76022], 95.00th=[ 99091], | 99.00th=[147850], 99.50th=[173016], 99.90th=[193987], 99.95th=[198181], | 99.99th=[198181] bw ( KiB/s): min= 7, max= 103, per=25.19%, avg=50.63, stdev=18.68, samples=233 iops : min= 1, max= 25, avg=12.01, stdev= 4.72, samples=233 write: IOPS=13, BW=52.2KiB/s (53.5kB/s)(6236KiB/119430msec); 0 zone resets clat (usec): min=998, max=515336, avg=34970.95, stdev=37295.50 lat (usec): min=1000, max=515340, avg=34972.56, stdev=37295.62 clat percentiles (usec): | 1.00th=[ 1090], 5.00th=[ 1385], 10.00th=[ 1942], 20.00th=[ 3884], | 30.00th=[ 8455], 40.00th=[ 18220], 50.00th=[ 26084], 60.00th=[ 33817], | 70.00th=[ 44303], 80.00th=[ 59507], 90.00th=[ 82314], 95.00th=[101188], | 99.00th=[154141], 99.50th=[185598], 99.90th=[329253], 99.95th=[513803], | 99.99th=[513803] bw ( KiB/s): min= 7, max= 110, per=24.51%, avg=51.47, stdev=21.76, samples=236 iops : min= 1, max= 27, avg=12.22, stdev= 5.49, samples=236 lat (usec) : 50=0.26%, 100=1.63%, 250=0.20%, 500=0.03%, 1000=0.03% lat (msec) : 2=5.24%, 4=5.11%, 10=6.18%, 20=10.51%, 50=43.33% lat (msec) : 100=22.46%, 250=4.95%, 500=0.03%, 750=0.03% cpu : usr=0.09%, sys=5.36%, ctx=6753, majf=0, minf=19 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=201KiB/s (206kB/s), 50.0KiB/s-51.5KiB/s (51.2kB/s-52.7kB/s), io=23.4MiB (24.6MB), run=117130-119430msec WRITE: bw=210KiB/s (216kB/s), 52.2KiB/s-53.4KiB/s (53.5kB/s-54.7kB/s), io=24.6MiB (25.7MB), run=117130-119430msec rand-rw: (groupid=0, jobs=1): err= 0: pid=180378: Sun Sep 6 01:24:20 2026 read: IOPS=9, BW=36.5KiB/s (37.4kB/s)(5992KiB/164104msec) clat (msec): min=6, max=928, avg=44.10, stdev=45.52 lat (msec): min=6, max=928, avg=44.11, stdev=45.52 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 14], 20.00th=[ 18], | 30.00th=[ 22], 40.00th=[ 26], 50.00th=[ 30], 60.00th=[ 36], | 70.00th=[ 46], 80.00th=[ 61], 90.00th=[ 93], 95.00th=[ 125], | 99.00th=[ 211], 99.50th=[ 243], 99.90th=[ 321], 99.95th=[ 927], | 99.99th=[ 927] bw ( KiB/s): min= 7, max= 111, per=25.28%, avg=36.91, stdev=21.97, samples=316 iops : min= 1, max= 27, avg= 8.59, stdev= 5.51, samples=316 write: IOPS=9, BW=38.4KiB/s (39.3kB/s)(6296KiB/164104msec); 0 zone resets clat (msec): min=12, max=354, avg=61.99, stdev=39.99 lat (msec): min=12, max=354, avg=62.00, stdev=39.98 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 23], 10.00th=[ 27], 20.00th=[ 32], | 30.00th=[ 38], 40.00th=[ 44], 50.00th=[ 51], 60.00th=[ 59], | 70.00th=[ 70], 80.00th=[ 88], 90.00th=[ 112], 95.00th=[ 142], | 99.00th=[ 201], 99.50th=[ 226], 99.90th=[ 317], 99.95th=[ 355], | 99.99th=[ 355] bw ( KiB/s): min= 7, max= 111, per=25.01%, avg=38.26, stdev=20.52, samples=320 iops : min= 1, max= 27, avg= 8.92, stdev= 5.17, samples=320 lat (msec) : 10=1.46%, 20=12.99%, 50=46.68%, 100=27.44%, 250=10.97% lat (msec) : 500=0.42%, 1000=0.03% cpu : usr=0.06%, sys=1.83%, ctx=4675, 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=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=180379: Sun Sep 6 01:24:20 2026 read: IOPS=9, BW=36.5KiB/s (37.4kB/s)(5940KiB/162719msec) clat (msec): min=5, max=669, avg=41.72, stdev=40.47 lat (msec): min=5, max=669, avg=41.73, stdev=40.47 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 21], 40.00th=[ 25], 50.00th=[ 29], 60.00th=[ 35], | 70.00th=[ 44], 80.00th=[ 61], 90.00th=[ 89], 95.00th=[ 116], | 99.00th=[ 186], 99.50th=[ 220], 99.90th=[ 359], 99.95th=[ 667], | 99.99th=[ 667] bw ( KiB/s): min= 7, max= 134, per=25.37%, avg=37.05, stdev=23.10, samples=311 iops : min= 1, max= 33, avg= 8.64, stdev= 5.80, samples=311 write: IOPS=9, BW=39.0KiB/s (39.9kB/s)(6348KiB/162719msec); 0 zone resets clat (msec): min=11, max=384, avg=63.22, stdev=42.45 lat (msec): min=11, max=384, avg=63.22, stdev=42.45 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 22], 10.00th=[ 26], 20.00th=[ 32], | 30.00th=[ 38], 40.00th=[ 43], 50.00th=[ 51], 60.00th=[ 60], | 70.00th=[ 71], 80.00th=[ 90], 90.00th=[ 116], 95.00th=[ 146], | 99.00th=[ 211], 99.50th=[ 264], 99.90th=[ 347], 99.95th=[ 384], | 99.99th=[ 384] bw ( KiB/s): min= 7, max= 103, per=25.47%, avg=38.96, stdev=20.73, samples=316 iops : min= 1, max= 25, avg= 9.10, stdev= 5.20, samples=316 lat (msec) : 10=1.99%, 20=13.44%, 50=46.19%, 100=26.82%, 250=11.10% lat (msec) : 500=0.42%, 750=0.03% cpu : usr=0.06%, sys=1.89%, ctx=4745, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1485,1587,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180380: Sun Sep 6 01:24:20 2026 read: IOPS=9, BW=36.9KiB/s (37.7kB/s)(6028KiB/163577msec) clat (msec): min=5, max=358, avg=43.45, stdev=38.04 lat (msec): min=5, max=358, avg=43.45, stdev=38.04 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 12], 10.00th=[ 14], 20.00th=[ 18], | 30.00th=[ 22], 40.00th=[ 26], 50.00th=[ 31], 60.00th=[ 37], | 70.00th=[ 46], 80.00th=[ 62], 90.00th=[ 94], 95.00th=[ 124], | 99.00th=[ 171], 99.50th=[ 215], 99.90th=[ 296], 99.95th=[ 359], | 99.99th=[ 359] bw ( KiB/s): min= 7, max= 151, per=25.30%, avg=36.94, stdev=22.02, samples=317 iops : min= 1, max= 37, avg= 8.60, stdev= 5.54, samples=317 write: IOPS=9, BW=38.3KiB/s (39.2kB/s)(6260KiB/163577msec); 0 zone resets clat (msec): min=11, max=680, avg=62.40, stdev=42.97 lat (msec): min=11, max=680, avg=62.41, stdev=42.97 clat percentiles (msec): | 1.00th=[ 18], 5.00th=[ 23], 10.00th=[ 27], 20.00th=[ 32], | 30.00th=[ 37], 40.00th=[ 43], 50.00th=[ 50], 60.00th=[ 58], | 70.00th=[ 71], 80.00th=[ 89], 90.00th=[ 114], 95.00th=[ 142], | 99.00th=[ 211], 99.50th=[ 245], 99.90th=[ 292], 99.95th=[ 684], | 99.99th=[ 684] bw ( KiB/s): min= 7, max= 111, per=25.11%, avg=38.43, stdev=20.44, samples=317 iops : min= 1, max= 27, avg= 8.97, stdev= 5.13, samples=317 lat (msec) : 10=1.63%, 20=12.34%, 50=47.82%, 100=26.53%, 250=11.33% lat (msec) : 500=0.33%, 750=0.03% cpu : usr=0.05%, sys=1.80%, ctx=4762, 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=180381: Sun Sep 6 01:24:20 2026 read: IOPS=9, BW=37.0KiB/s (37.9kB/s)(6052KiB/163474msec) clat (msec): min=5, max=299, avg=43.59, stdev=38.27 lat (msec): min=5, max=299, avg=43.59, stdev=38.27 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 14], 20.00th=[ 18], | 30.00th=[ 22], 40.00th=[ 26], 50.00th=[ 31], 60.00th=[ 37], | 70.00th=[ 46], 80.00th=[ 62], 90.00th=[ 96], 95.00th=[ 124], | 99.00th=[ 182], 99.50th=[ 220], 99.90th=[ 288], 99.95th=[ 300], | 99.99th=[ 300] bw ( KiB/s): min= 7, max= 134, per=25.82%, avg=37.69, stdev=22.86, samples=313 iops : min= 1, max= 33, avg= 8.79, stdev= 5.75, samples=313 write: IOPS=9, BW=38.1KiB/s (39.1kB/s)(6236KiB/163474msec); 0 zone resets clat (msec): min=9, max=683, avg=62.28, stdev=43.50 lat (msec): min=9, max=683, avg=62.29, stdev=43.50 clat percentiles (msec): | 1.00th=[ 16], 5.00th=[ 22], 10.00th=[ 26], 20.00th=[ 32], | 30.00th=[ 37], 40.00th=[ 43], 50.00th=[ 50], 60.00th=[ 58], | 70.00th=[ 69], 80.00th=[ 89], 90.00th=[ 115], 95.00th=[ 150], | 99.00th=[ 203], 99.50th=[ 245], 99.90th=[ 384], 99.95th=[ 684], | 99.99th=[ 684] bw ( KiB/s): min= 7, max= 119, per=24.97%, avg=38.20, stdev=20.96, samples=318 iops : min= 1, max= 29, avg= 8.92, stdev= 5.27, samples=318 lat (msec) : 10=1.86%, 20=12.99%, 50=47.14%, 100=25.85%, 250=11.78% lat (msec) : 500=0.36%, 750=0.03% cpu : usr=0.06%, sys=1.88%, ctx=4791, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1513,1559,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=146KiB/s (150kB/s), 36.5KiB/s-37.0KiB/s (37.4kB/s-37.9kB/s), io=23.4MiB (24.6MB), run=162719-164104msec WRITE: bw=153KiB/s (157kB/s), 38.1KiB/s-39.0KiB/s (39.1kB/s-39.9kB/s), io=24.6MiB (25.7MB), run=162719-164104msec 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=180432: Sun Sep 6 01:25:04 2026 read: IOPS=11, BW=181KiB/s (185kB/s)(5920KiB/32787msec) clat (usec): min=33, max=219042, avg=45506.05, stdev=31227.63 lat (usec): min=34, max=219043, avg=45507.76, stdev=31227.64 clat percentiles (usec): | 1.00th=[ 51], 5.00th=[ 67], 10.00th=[ 12780], 20.00th=[ 22676], | 30.00th=[ 28705], 40.00th=[ 33817], 50.00th=[ 39060], 60.00th=[ 46400], | 70.00th=[ 55313], 80.00th=[ 67634], 90.00th=[ 87557], 95.00th=[ 99091], | 99.00th=[162530], 99.50th=[166724], 99.90th=[219153], 99.95th=[219153], | 99.99th=[219153] bw ( KiB/s): min= 63, max= 318, per=25.29%, avg=176.28, stdev=65.16, samples=64 iops : min= 3, max= 19, avg=10.19, stdev= 4.09, samples=64 write: IOPS=12, BW=194KiB/s (199kB/s)(6368KiB/32787msec); 0 zone resets clat (usec): min=1642, max=238315, avg=39470.69, stdev=38434.32 lat (usec): min=1645, max=238316, avg=39473.07, stdev=38434.20 clat percentiles (usec): | 1.00th=[ 1795], 5.00th=[ 2933], 10.00th=[ 4293], 20.00th=[ 6915], | 30.00th=[ 9896], 40.00th=[ 17695], 50.00th=[ 27132], 60.00th=[ 39584], | 70.00th=[ 53216], 80.00th=[ 63701], 90.00th=[ 93848], 95.00th=[111674], | 99.00th=[181404], 99.50th=[183501], 99.90th=[238027], 99.95th=[238027], | 99.99th=[238027] bw ( KiB/s): min= 63, max= 375, per=27.08%, avg=198.47, stdev=72.19, samples=62 iops : min= 3, max= 23, avg=11.58, stdev= 4.54, samples=62 lat (usec) : 50=0.39%, 100=2.60%, 250=1.04%, 500=0.26%, 750=0.26% lat (msec) : 2=1.43%, 4=2.99%, 10=11.33%, 20=9.51%, 50=36.20% lat (msec) : 100=27.60%, 250=6.38% cpu : usr=0.08%, sys=5.69%, ctx=1836, 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=180433: Sun Sep 6 01:25:04 2026 read: IOPS=11, BW=183KiB/s (187kB/s)(5744KiB/31420msec) clat (usec): min=46, max=220275, avg=45983.96, stdev=30676.22 lat (usec): min=47, max=220276, avg=45993.36, stdev=30689.48 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 67], 10.00th=[ 84], 20.00th=[ 22938], | 30.00th=[ 30278], 40.00th=[ 36439], 50.00th=[ 42206], 60.00th=[ 49021], | 70.00th=[ 58459], 80.00th=[ 68682], 90.00th=[ 82314], 95.00th=[102237], | 99.00th=[132645], 99.50th=[149947], 99.90th=[221250], 99.95th=[221250], | 99.99th=[221250] bw ( KiB/s): min= 63, max= 317, per=26.20%, avg=182.65, stdev=60.25, samples=62 iops : min= 3, max= 19, avg=10.58, stdev= 3.81, samples=62 write: IOPS=13, BW=208KiB/s (213kB/s)(6544KiB/31420msec); 0 zone resets clat (usec): min=1507, max=179475, avg=36153.95, stdev=35526.54 lat (usec): min=1507, max=179478, avg=36179.71, stdev=35546.82 clat percentiles (usec): | 1.00th=[ 1778], 5.00th=[ 2606], 10.00th=[ 3294], 20.00th=[ 5932], | 30.00th=[ 8586], 40.00th=[ 13829], 50.00th=[ 23987], 60.00th=[ 36439], | 70.00th=[ 48497], 80.00th=[ 64226], 90.00th=[ 88605], 95.00th=[109577], | 99.00th=[135267], 99.50th=[156238], 99.90th=[179307], 99.95th=[179307], | 99.99th=[179307] bw ( KiB/s): min= 32, max= 474, per=28.28%, avg=207.32, stdev=93.11, samples=62 iops : min= 2, max= 29, avg=12.13, stdev= 5.84, samples=62 lat (usec) : 50=0.13%, 100=4.69%, 250=1.04% lat (msec) : 2=1.69%, 4=5.34%, 10=10.55%, 20=9.24%, 50=33.46% lat (msec) : 100=27.34%, 250=6.51% cpu : usr=0.07%, sys=5.49%, ctx=1657, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=359,409,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180434: Sun Sep 6 01:25:04 2026 read: IOPS=11, BW=182KiB/s (187kB/s)(6256KiB/34348msec) clat (usec): min=41, max=275894, avg=47486.99, stdev=32946.87 lat (usec): min=41, max=275894, avg=47488.34, stdev=32946.86 clat percentiles (usec): | 1.00th=[ 51], 5.00th=[ 62], 10.00th=[ 318], 20.00th=[ 23200], | 30.00th=[ 30278], 40.00th=[ 36963], 50.00th=[ 44303], 60.00th=[ 50070], | 70.00th=[ 56886], 80.00th=[ 69731], 90.00th=[ 87557], 95.00th=[103285], | 99.00th=[175113], 99.50th=[179307], 99.90th=[274727], 99.95th=[274727], | 99.99th=[274727] bw ( KiB/s): min= 31, max= 447, per=26.01%, avg=181.27, stdev=72.24, samples=67 iops : min= 1, max= 27, avg=10.49, stdev= 4.53, samples=67 write: IOPS=10, BW=176KiB/s (180kB/s)(6032KiB/34348msec); 0 zone resets clat (usec): min=1636, max=220356, avg=41371.34, stdev=39365.17 lat (usec): min=1638, max=220360, avg=41373.75, stdev=39365.76 clat percentiles (usec): | 1.00th=[ 1729], 5.00th=[ 2573], 10.00th=[ 4228], 20.00th=[ 6718], | 30.00th=[ 12125], 40.00th=[ 22414], 50.00th=[ 30540], 60.00th=[ 41681], | 70.00th=[ 51643], 80.00th=[ 68682], 90.00th=[ 93848], 95.00th=[122160], | 99.00th=[189793], 99.50th=[206570], 99.90th=[221250], 99.95th=[221250], | 99.99th=[221250] bw ( KiB/s): min= 31, max= 349, per=23.43%, avg=171.72, stdev=70.91, samples=67 iops : min= 1, max= 21, avg= 9.90, stdev= 4.48, samples=67 lat (usec) : 50=0.26%, 100=4.04%, 250=0.78%, 500=0.13%, 1000=0.13% lat (msec) : 2=1.30%, 4=3.52%, 10=8.59%, 20=8.20%, 50=36.85% lat (msec) : 100=29.17%, 250=6.90%, 500=0.13% cpu : usr=0.06%, sys=5.51%, ctx=1876, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180435: Sun Sep 6 01:25:04 2026 read: IOPS=11, BW=178KiB/s (182kB/s)(6032KiB/33911msec) clat (usec): min=39, max=317835, avg=48540.37, stdev=38330.14 lat (usec): min=39, max=317836, avg=48542.59, stdev=38329.78 clat percentiles (usec): | 1.00th=[ 50], 5.00th=[ 60], 10.00th=[ 77], 20.00th=[ 23462], | 30.00th=[ 28705], 40.00th=[ 34866], 50.00th=[ 42730], 60.00th=[ 51643], | 70.00th=[ 60031], 80.00th=[ 72877], 90.00th=[ 90702], 95.00th=[109577], | 99.00th=[206570], 99.50th=[246416], 99.90th=[316670], 99.95th=[316670], | 99.99th=[316670] bw ( KiB/s): min= 31, max= 371, per=25.22%, avg=175.79, stdev=73.68, samples=66 iops : min= 1, max= 23, avg=10.17, stdev= 4.66, samples=66 write: IOPS=11, BW=184KiB/s (189kB/s)(6256KiB/33911msec); 0 zone resets clat (usec): min=1505, max=216914, avg=39164.36, stdev=37991.90 lat (usec): min=1507, max=216916, avg=39169.18, stdev=37992.69 clat percentiles (usec): | 1.00th=[ 1680], 5.00th=[ 2474], 10.00th=[ 3785], 20.00th=[ 6194], | 30.00th=[ 11731], 40.00th=[ 19792], 50.00th=[ 27395], 60.00th=[ 38536], | 70.00th=[ 49021], 80.00th=[ 65274], 90.00th=[ 89654], 95.00th=[115868], | 99.00th=[173016], 99.50th=[185598], 99.90th=[217056], 99.95th=[217056], | 99.99th=[217056] bw ( KiB/s): min= 62, max= 415, per=24.91%, avg=182.56, stdev=80.50, samples=66 iops : min= 3, max= 25, avg=10.58, stdev= 5.08, samples=66 lat (usec) : 50=0.39%, 100=5.86%, 250=0.26%, 500=0.26%, 750=0.13% lat (msec) : 2=1.56%, 4=4.43%, 10=7.81%, 20=8.20%, 50=35.81% lat (msec) : 100=27.47%, 250=7.68%, 500=0.13% cpu : usr=0.06%, sys=5.57%, ctx=1763, 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=697KiB/s (714kB/s), 178KiB/s-183KiB/s (182kB/s-187kB/s), io=23.4MiB (24.5MB), run=31420-34348msec WRITE: bw=734KiB/s (751kB/s), 176KiB/s-208KiB/s (180kB/s-213kB/s), io=24.6MiB (25.8MB), run=31420-34348msec rand-rw: (groupid=0, jobs=1): err= 0: pid=180427: Sun Sep 6 01:25:16 2026 read: IOPS=8, BW=129KiB/s (132kB/s)(5920KiB/45814msec) clat (msec): min=6, max=241, avg=45.52, stdev=36.77 lat (msec): min=6, max=241, avg=45.53, stdev=36.77 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 14], 10.00th=[ 16], 20.00th=[ 20], | 30.00th=[ 24], 40.00th=[ 28], 50.00th=[ 34], 60.00th=[ 40], | 70.00th=[ 48], 80.00th=[ 65], 90.00th=[ 97], 95.00th=[ 123], | 99.00th=[ 165], 99.50th=[ 239], 99.90th=[ 243], 99.95th=[ 243], | 99.99th=[ 243] bw ( KiB/s): min= 31, max= 382, per=24.97%, avg=130.08, stdev=80.86, samples=88 iops : min= 1, max= 23, avg= 7.31, stdev= 5.10, samples=88 write: IOPS=8, BW=139KiB/s (142kB/s)(6368KiB/45814msec); 0 zone resets clat (msec): min=17, max=247, avg=72.25, stdev=47.17 lat (msec): min=17, max=247, avg=72.25, stdev=47.17 clat percentiles (msec): | 1.00th=[ 20], 5.00th=[ 25], 10.00th=[ 28], 20.00th=[ 34], | 30.00th=[ 41], 40.00th=[ 48], 50.00th=[ 57], 60.00th=[ 69], | 70.00th=[ 83], 80.00th=[ 111], 90.00th=[ 142], 95.00th=[ 165], | 99.00th=[ 236], 99.50th=[ 247], 99.90th=[ 247], 99.95th=[ 247], | 99.99th=[ 247] bw ( KiB/s): min= 31, max= 351, per=25.15%, avg=137.82, stdev=80.40, samples=90 iops : min= 1, max= 21, avg= 7.80, stdev= 5.08, samples=90 lat (msec) : 10=1.04%, 20=10.03%, 50=45.44%, 100=26.69%, 250=16.80% cpu : usr=0.05%, sys=1.73%, ctx=1168, 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=180429: Sun Sep 6 01:25:16 2026 read: IOPS=7, BW=125KiB/s (128kB/s)(5744KiB/45945msec) clat (msec): min=6, max=230, avg=46.94, stdev=40.91 lat (msec): min=6, max=230, avg=46.95, stdev=40.91 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 14], 10.00th=[ 17], 20.00th=[ 20], | 30.00th=[ 23], 40.00th=[ 26], 50.00th=[ 30], 60.00th=[ 36], | 70.00th=[ 50], 80.00th=[ 71], 90.00th=[ 109], 95.00th=[ 133], | 99.00th=[ 213], 99.50th=[ 224], 99.90th=[ 230], 99.95th=[ 230], | 99.99th=[ 230] bw ( KiB/s): min= 31, max= 351, per=24.95%, avg=130.00, stdev=86.74, samples=85 iops : min= 1, max= 21, avg= 7.31, stdev= 5.43, samples=85 write: IOPS=8, BW=142KiB/s (146kB/s)(6544KiB/45945msec); 0 zone resets clat (msec): min=13, max=389, avg=70.95, stdev=51.13 lat (msec): min=13, max=389, avg=70.96, stdev=51.13 clat percentiles (msec): | 1.00th=[ 15], 5.00th=[ 23], 10.00th=[ 28], 20.00th=[ 34], | 30.00th=[ 41], 40.00th=[ 46], 50.00th=[ 55], 60.00th=[ 66], | 70.00th=[ 81], 80.00th=[ 99], 90.00th=[ 142], 95.00th=[ 167], | 99.00th=[ 262], 99.50th=[ 284], 99.90th=[ 388], 99.95th=[ 388], | 99.99th=[ 388] bw ( KiB/s): min= 31, max= 414, per=25.40%, avg=139.18, stdev=80.35, samples=90 iops : min= 1, max= 25, avg= 7.88, stdev= 5.07, samples=90 lat (msec) : 10=1.17%, 20=10.29%, 50=45.70%, 100=27.47%, 250=14.58% lat (msec) : 500=0.78% cpu : usr=0.06%, sys=1.83%, ctx=1203, 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=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=180430: Sun Sep 6 01:25:16 2026 read: IOPS=8, BW=137KiB/s (141kB/s)(6256KiB/45539msec) clat (msec): min=7, max=352, avg=47.90, stdev=43.60 lat (msec): min=7, max=352, avg=47.90, stdev=43.60 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 13], 10.00th=[ 16], 20.00th=[ 19], | 30.00th=[ 24], 40.00th=[ 28], 50.00th=[ 33], 60.00th=[ 39], | 70.00th=[ 49], 80.00th=[ 67], 90.00th=[ 99], 95.00th=[ 138], | 99.00th=[ 226], 99.50th=[ 241], 99.90th=[ 355], 99.95th=[ 355], | 99.99th=[ 355] bw ( KiB/s): min= 31, max= 477, per=26.52%, avg=138.16, stdev=97.02, samples=88 iops : min= 1, max= 29, avg= 7.82, stdev= 6.12, samples=88 write: IOPS=8, BW=132KiB/s (136kB/s)(6032KiB/45539msec); 0 zone resets clat (msec): min=16, max=304, avg=70.19, stdev=45.56 lat (msec): min=16, max=304, avg=70.22, stdev=45.55 clat percentiles (msec): | 1.00th=[ 20], 5.00th=[ 25], 10.00th=[ 29], 20.00th=[ 35], | 30.00th=[ 40], 40.00th=[ 45], 50.00th=[ 53], 60.00th=[ 69], | 70.00th=[ 84], 80.00th=[ 101], 90.00th=[ 131], 95.00th=[ 174], | 99.00th=[ 226], 99.50th=[ 243], 99.90th=[ 305], 99.95th=[ 305], | 99.99th=[ 305] bw ( KiB/s): min= 31, max= 344, per=23.60%, avg=129.34, stdev=74.35, samples=89 iops : min= 1, max= 21, avg= 7.27, stdev= 4.68, samples=89 lat (msec) : 10=0.78%, 20=11.98%, 50=46.22%, 100=26.04%, 250=14.71% lat (msec) : 500=0.26% cpu : usr=0.05%, sys=1.84%, ctx=1234, 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=180431: Sun Sep 6 01:25:16 2026 read: IOPS=8, BW=133KiB/s (136kB/s)(6032KiB/45264msec) clat (msec): min=8, max=341, avg=49.96, stdev=44.40 lat (msec): min=8, max=341, avg=49.96, stdev=44.40 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 13], 10.00th=[ 16], 20.00th=[ 20], | 30.00th=[ 24], 40.00th=[ 28], 50.00th=[ 33], 60.00th=[ 41], | 70.00th=[ 54], 80.00th=[ 75], 90.00th=[ 111], 95.00th=[ 144], | 99.00th=[ 190], 99.50th=[ 255], 99.90th=[ 342], 99.95th=[ 342], | 99.99th=[ 342] bw ( KiB/s): min= 31, max= 381, per=25.75%, avg=134.17, stdev=75.88, samples=87 iops : min= 1, max= 23, avg= 7.57, stdev= 4.80, samples=87 write: IOPS=8, BW=138KiB/s (142kB/s)(6256KiB/45264msec); 0 zone resets clat (msec): min=16, max=285, avg=67.02, stdev=42.04 lat (msec): min=16, max=285, avg=67.03, stdev=42.04 clat percentiles (msec): | 1.00th=[ 20], 5.00th=[ 25], 10.00th=[ 29], 20.00th=[ 36], | 30.00th=[ 40], 40.00th=[ 47], 50.00th=[ 53], 60.00th=[ 63], | 70.00th=[ 79], 80.00th=[ 97], 90.00th=[ 122], 95.00th=[ 153], | 99.00th=[ 213], 99.50th=[ 228], 99.90th=[ 288], 99.95th=[ 288], | 99.99th=[ 288] bw ( KiB/s): min= 31, max= 380, per=25.03%, avg=137.18, stdev=77.51, samples=89 iops : min= 1, max= 23, avg= 7.76, stdev= 4.88, samples=89 lat (msec) : 10=1.04%, 20=10.03%, 50=45.57%, 100=27.21%, 250=15.63% lat (msec) : 500=0.52% cpu : usr=0.06%, sys=1.79%, ctx=1226, 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=521KiB/s (534kB/s), 125KiB/s-137KiB/s (128kB/s-141kB/s), io=23.4MiB (24.5MB), run=45264-45945msec WRITE: bw=548KiB/s (562kB/s), 132KiB/s-142KiB/s (136kB/s-146kB/s), io=24.6MiB (25.8MB), run=45264-45945msec 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=180448: Sun Sep 6 01:25:28 2026 read: IOPS=2, BW=3041KiB/s (3114kB/s)(7168KiB/2357msec) clat (msec): min=41, max=273, avg=173.07, stdev=83.77 lat (msec): min=41, max=273, avg=173.07, stdev=83.77 clat percentiles (msec): | 1.00th=[ 42], 5.00th=[ 42], 10.00th=[ 42], 20.00th=[ 114], | 30.00th=[ 134], 40.00th=[ 134], 50.00th=[ 180], 60.00th=[ 203], | 70.00th=[ 203], 80.00th=[ 268], 90.00th=[ 275], 95.00th=[ 275], | 99.00th=[ 275], 99.50th=[ 275], 99.90th=[ 275], 99.95th=[ 275], | 99.99th=[ 275] bw ( KiB/s): min= 2023, max= 4243, per=68.30%, avg=3451.00, stdev=1239.14, samples=3 iops : min= 1, max= 4, avg= 2.67, stdev= 1.53, samples=3 write: IOPS=2, BW=2172KiB/s (2224kB/s)(5120KiB/2357msec); 0 zone resets clat (msec): min=164, max=285, avg=216.93, stdev=47.34 lat (msec): min=164, max=285, avg=217.06, stdev=47.26 clat percentiles (msec): | 1.00th=[ 165], 5.00th=[ 165], 10.00th=[ 165], 20.00th=[ 165], | 30.00th=[ 184], 40.00th=[ 184], 50.00th=[ 215], 60.00th=[ 215], | 70.00th=[ 236], 80.00th=[ 236], 90.00th=[ 288], 95.00th=[ 288], | 99.00th=[ 288], 99.50th=[ 288], 99.90th=[ 288], 99.95th=[ 288], | 99.99th=[ 288] bw ( KiB/s): min= 2023, max= 5710, per=46.07%, avg=3258.67, stdev=2122.94, samples=3 iops : min= 1, max= 5, avg= 2.33, stdev= 2.31, samples=3 lat (msec) : 50=8.33%, 250=66.67%, 500=25.00% cpu : usr=0.00%, sys=29.07%, ctx=189, 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=180450: Sun Sep 6 01:25:28 2026 read: IOPS=0, BW=505KiB/s (517kB/s)(2048KiB/4053msec) clat (usec): min=780, max=269171, avg=134976.01, stdev=189780.67 lat (usec): min=782, max=269173, avg=134977.91, stdev=189781.46 clat percentiles (usec): | 1.00th=[ 783], 5.00th=[ 783], 10.00th=[ 783], 20.00th=[ 783], | 30.00th=[ 783], 40.00th=[ 783], 50.00th=[ 783], 60.00th=[270533], | 70.00th=[270533], 80.00th=[270533], 90.00th=[270533], 95.00th=[270533], | 99.00th=[270533], 99.50th=[270533], 99.90th=[270533], 99.95th=[270533], | 99.99th=[270533] bw ( KiB/s): min= 1428, max= 2027, per=34.19%, avg=1727.50, stdev=423.56, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=2, BW=2527KiB/s (2587kB/s)(10.0MiB/4053msec); 0 zone resets clat (msec): min=197, max=759, avg=370.87, stdev=208.88 lat (msec): min=197, max=759, avg=371.00, stdev=208.87 clat percentiles (msec): | 1.00th=[ 199], 5.00th=[ 199], 10.00th=[ 199], 20.00th=[ 201], | 30.00th=[ 209], 40.00th=[ 211], 50.00th=[ 255], 60.00th=[ 284], | 70.00th=[ 435], 80.00th=[ 481], 90.00th=[ 676], 95.00th=[ 760], | 99.00th=[ 760], 99.50th=[ 760], 99.90th=[ 760], 99.95th=[ 760], | 99.99th=[ 760] bw ( KiB/s): min= 1903, max= 4071, per=37.94%, avg=2683.67, stdev=1069.53, samples=6 iops : min= 1, max= 3, avg= 1.67, stdev= 1.03, samples=6 lat (usec) : 1000=8.33% lat (msec) : 250=33.33%, 500=41.67%, 750=8.33%, 1000=8.33% cpu : usr=0.00%, sys=21.67%, ctx=209, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=2,10,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180451: Sun Sep 6 01:25:28 2026 read: IOPS=1, BW=1957KiB/s (2004kB/s)(6144KiB/3140msec) clat (usec): min=509, max=268030, avg=141193.41, stdev=116950.77 lat (usec): min=510, max=268032, avg=141194.75, stdev=116950.75 clat percentiles (usec): | 1.00th=[ 510], 5.00th=[ 510], 10.00th=[ 510], 20.00th=[ 693], | 30.00th=[ 693], 40.00th=[139461], 50.00th=[139461], 60.00th=[200279], | 70.00th=[238027], 80.00th=[238027], 90.00th=[267387], 95.00th=[267387], | 99.00th=[267387], 99.50th=[267387], 99.90th=[267387], 99.95th=[267387], | 99.99th=[267387] bw ( KiB/s): min= 1882, max= 4096, per=66.19%, avg=3344.33, stdev=1266.58, samples=3 iops : min= 1, max= 4, avg= 2.67, stdev= 1.53, samples=3 write: IOPS=1, BW=1957KiB/s (2004kB/s)(6144KiB/3140msec); 0 zone resets clat (msec): min=169, max=669, avg=371.74, stdev=203.19 lat (msec): min=169, max=669, avg=371.84, stdev=203.19 clat percentiles (msec): | 1.00th=[ 169], 5.00th=[ 169], 10.00th=[ 169], 20.00th=[ 197], | 30.00th=[ 197], 40.00th=[ 230], 50.00th=[ 230], 60.00th=[ 460], | 70.00th=[ 506], 80.00th=[ 506], 90.00th=[ 667], 95.00th=[ 667], | 99.00th=[ 667], 99.50th=[ 667], 99.90th=[ 667], 99.95th=[ 667], | 99.99th=[ 667] bw ( KiB/s): min= 1882, max= 3750, per=33.12%, avg=2342.80, stdev=789.30, samples=5 iops : min= 1, max= 3, avg= 1.60, stdev= 0.89, samples=5 lat (usec) : 750=16.67% lat (msec) : 250=50.00%, 500=16.67%, 750=16.67% cpu : usr=0.00%, sys=22.11%, ctx=271, 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=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=180452: Sun Sep 6 01:25:28 2026 read: IOPS=1, BW=1768KiB/s (1810kB/s)(5120KiB/2896msec) clat (usec): min=392, max=178216, avg=56403.62, stdev=80929.67 lat (usec): min=393, max=178217, avg=56405.05, stdev=80929.88 clat percentiles (usec): | 1.00th=[ 392], 5.00th=[ 392], 10.00th=[ 392], 20.00th=[ 392], | 30.00th=[ 619], 40.00th=[ 619], 50.00th=[ 1090], 60.00th=[ 1090], | 70.00th=[101188], 80.00th=[101188], 90.00th=[177210], 95.00th=[177210], | 99.00th=[177210], 99.50th=[177210], 99.90th=[177210], 99.95th=[177210], | 99.99th=[177210] bw ( KiB/s): min= 8094, max= 8094, per=100.00%, avg=8094.00, stdev= 0.00, samples=1 iops : min= 7, max= 7, avg= 7.00, stdev= 0.00, samples=1 write: IOPS=2, BW=2475KiB/s (2535kB/s)(7168KiB/2896msec); 0 zone resets clat (msec): min=129, max=691, avg=342.37, stdev=216.86 lat (msec): min=129, max=691, avg=342.45, stdev=216.87 clat percentiles (msec): | 1.00th=[ 130], 5.00th=[ 130], 10.00th=[ 130], 20.00th=[ 159], | 30.00th=[ 174], 40.00th=[ 174], 50.00th=[ 284], 60.00th=[ 414], | 70.00th=[ 414], 80.00th=[ 550], 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= 1464, max= 4087, per=41.10%, avg=2907.25, stdev=1363.09, samples=4 iops : min= 1, max= 3, avg= 2.00, stdev= 1.15, samples=4 lat (usec) : 500=8.33%, 750=8.33% lat (msec) : 2=8.33%, 250=41.67%, 500=16.67%, 750=16.67% cpu : usr=0.00%, sys=22.35%, ctx=171, 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=5053KiB/s (5174kB/s), 505KiB/s-3041KiB/s (517kB/s-3114kB/s), io=20.0MiB (20.0MB), run=2357-4053msec WRITE: bw=7074KiB/s (7244kB/s), 1957KiB/s-2527KiB/s (2004kB/s-2587kB/s), io=28.0MiB (29.4MB), run=2357-4053msec rand-rw: (groupid=0, jobs=1): err= 0: pid=180453: Sun Sep 6 01:25:28 2026 read: IOPS=1, BW=1817KiB/s (1860kB/s)(7168KiB/3946msec) clat (msec): min=83, max=1018, avg=294.15, stdev=327.54 lat (msec): min=83, max=1018, avg=294.16, stdev=327.54 clat percentiles (msec): | 1.00th=[ 85], 5.00th=[ 85], 10.00th=[ 85], 20.00th=[ 90], | 30.00th=[ 159], 40.00th=[ 159], 50.00th=[ 203], 60.00th=[ 215], | 70.00th=[ 215], 80.00th=[ 296], 90.00th=[ 1020], 95.00th=[ 1020], | 99.00th=[ 1020], 99.50th=[ 1020], 99.90th=[ 1020], 99.95th=[ 1020], | 99.99th=[ 1020] bw ( KiB/s): min= 1309, max= 4096, per=57.82%, avg=2746.50, stdev=1306.29, samples=4 iops : min= 1, max= 4, avg= 2.25, stdev= 1.50, samples=4 write: IOPS=1, BW=1298KiB/s (1329kB/s)(5120KiB/3946msec); 0 zone resets clat (msec): min=97, max=563, avg=335.81, stdev=215.20 lat (msec): min=97, max=563, avg=336.14, stdev=215.13 clat percentiles (msec): | 1.00th=[ 99], 5.00th=[ 99], 10.00th=[ 99], 20.00th=[ 99], | 30.00th=[ 163], 40.00th=[ 163], 50.00th=[ 305], 60.00th=[ 305], | 70.00th=[ 550], 80.00th=[ 550], 90.00th=[ 567], 95.00th=[ 567], | 99.00th=[ 567], 99.50th=[ 567], 99.90th=[ 567], 99.95th=[ 567], | 99.99th=[ 567] bw ( KiB/s): min= 1924, max= 4096, per=50.30%, avg=3345.00, stdev=1231.29, samples=3 iops : min= 1, max= 4, avg= 2.67, stdev= 1.53, samples=3 lat (msec) : 100=25.00%, 250=33.33%, 500=16.67%, 750=16.67%, 2000=8.33% cpu : usr=0.00%, sys=6.11%, ctx=88, 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=180454: Sun Sep 6 01:25:28 2026 read: IOPS=0, BW=475KiB/s (486kB/s)(2048KiB/4311msec) clat (msec): min=101, max=439, avg=270.43, stdev=238.69 lat (msec): min=101, max=439, avg=270.43, stdev=238.69 clat percentiles (msec): | 1.00th=[ 102], 5.00th=[ 102], 10.00th=[ 102], 20.00th=[ 102], | 30.00th=[ 102], 40.00th=[ 102], 50.00th=[ 102], 60.00th=[ 439], | 70.00th=[ 439], 80.00th=[ 439], 90.00th=[ 439], 95.00th=[ 439], | 99.00th=[ 439], 99.50th=[ 439], 99.90th=[ 439], 99.95th=[ 439], | 99.99th=[ 439] bw ( KiB/s): min= 1903, max= 2039, per=41.49%, avg=1971.00, stdev=96.17, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=2, BW=2375KiB/s (2432kB/s)(10.0MiB/4311msec); 0 zone resets clat (msec): min=108, max=849, avg=354.41, stdev=260.55 lat (msec): min=108, max=849, avg=354.53, stdev=260.52 clat percentiles (msec): | 1.00th=[ 109], 5.00th=[ 109], 10.00th=[ 109], 20.00th=[ 150], | 30.00th=[ 192], 40.00th=[ 194], 50.00th=[ 205], 60.00th=[ 211], | 70.00th=[ 351], 80.00th=[ 609], 90.00th=[ 676], 95.00th=[ 852], | 99.00th=[ 852], 99.50th=[ 852], 99.90th=[ 852], 99.95th=[ 852], | 99.99th=[ 852] bw ( KiB/s): min= 1793, max= 6000, per=53.43%, avg=3553.40, stdev=1715.76, samples=5 iops : min= 1, max= 5, avg= 2.60, stdev= 1.67, samples=5 lat (msec) : 250=58.33%, 500=16.67%, 750=16.67%, 1000=8.33% cpu : usr=0.00%, sys=8.45%, ctx=168, 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=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=180455: Sun Sep 6 01:25:28 2026 read: IOPS=1, BW=1563KiB/s (1600kB/s)(6144KiB/3931msec) clat (msec): min=74, max=642, avg=242.00, stdev=219.66 lat (msec): min=74, max=642, avg=242.00, stdev=219.66 clat percentiles (msec): | 1.00th=[ 75], 5.00th=[ 75], 10.00th=[ 75], 20.00th=[ 80], | 30.00th=[ 80], 40.00th=[ 140], 50.00th=[ 140], 60.00th=[ 169], | 70.00th=[ 347], 80.00th=[ 347], 90.00th=[ 642], 95.00th=[ 642], | 99.00th=[ 642], 99.50th=[ 642], 99.90th=[ 642], 99.95th=[ 642], | 99.99th=[ 642] bw ( KiB/s): min= 1932, max= 4079, per=56.46%, avg=2682.00, stdev=1210.93, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 write: IOPS=1, BW=1563KiB/s (1600kB/s)(6144KiB/3931msec); 0 zone resets clat (msec): min=170, max=933, avg=398.38, stdev=322.61 lat (msec): min=170, max=933, avg=398.55, stdev=322.56 clat percentiles (msec): | 1.00th=[ 171], 5.00th=[ 171], 10.00th=[ 171], 20.00th=[ 180], | 30.00th=[ 180], 40.00th=[ 213], 50.00th=[ 213], 60.00th=[ 228], | 70.00th=[ 667], 80.00th=[ 667], 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= 1793, max= 3806, per=36.36%, avg=2418.25, stdev=932.29, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 lat (msec) : 100=16.67%, 250=50.00%, 500=8.33%, 750=16.67%, 1000=8.33% cpu : usr=0.03%, sys=5.73%, ctx=81, 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=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=180456: Sun Sep 6 01:25:28 2026 read: IOPS=1, BW=1231KiB/s (1260kB/s)(5120KiB/4160msec) clat (msec): min=62, max=505, avg=214.14, stdev=183.27 lat (msec): min=62, max=505, avg=214.14, stdev=183.27 clat percentiles (msec): | 1.00th=[ 63], 5.00th=[ 63], 10.00th=[ 63], 20.00th=[ 63], | 30.00th=[ 89], 40.00th=[ 89], 50.00th=[ 134], 60.00th=[ 134], | 70.00th=[ 279], 80.00th=[ 279], 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= 1787, max= 4015, per=55.09%, avg=2616.67, stdev=1218.00, samples=3 iops : min= 1, max= 3, avg= 2.00, stdev= 1.00, samples=3 write: IOPS=1, BW=1723KiB/s (1764kB/s)(7168KiB/4160msec); 0 zone resets clat (msec): min=111, max=850, avg=387.79, stdev=243.01 lat (msec): min=111, max=850, avg=387.99, stdev=243.07 clat percentiles (msec): | 1.00th=[ 112], 5.00th=[ 112], 10.00th=[ 112], 20.00th=[ 153], | 30.00th=[ 330], 40.00th=[ 330], 50.00th=[ 409], 60.00th=[ 414], | 70.00th=[ 414], 80.00th=[ 451], 90.00th=[ 852], 95.00th=[ 852], | 99.00th=[ 852], 99.50th=[ 852], 99.90th=[ 852], 99.95th=[ 852], | 99.99th=[ 852] bw ( KiB/s): min= 1787, max= 2048, per=29.46%, avg=1959.40, stdev=107.49, samples=5 iops : min= 1, max= 2, avg= 1.20, stdev= 0.45, samples=5 lat (msec) : 100=16.67%, 250=25.00%, 500=41.67%, 750=8.33%, 1000=8.33% cpu : usr=0.00%, sys=7.26%, ctx=107, 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=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=4751KiB/s (4865kB/s), 475KiB/s-1817KiB/s (486kB/s-1860kB/s), io=20.0MiB (20.0MB), run=3931-4311msec WRITE: bw=6651KiB/s (6811kB/s), 1298KiB/s-2375KiB/s (1329kB/s-2432kB/s), io=28.0MiB (29.4MB), run=3931-4311msec 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=180462: Sun Sep 6 01:25:39 2026 read: IOPS=1, BW=4498KiB/s (4606kB/s)(12.0MiB/2732msec) clat (msec): min=639, max=1330, avg=896.83, stdev=377.42 lat (msec): min=639, max=1330, avg=896.83, stdev=377.42 clat percentiles (msec): | 1.00th=[ 642], 5.00th=[ 642], 10.00th=[ 642], 20.00th=[ 642], | 30.00th=[ 642], 40.00th=[ 718], 50.00th=[ 718], 60.00th=[ 718], | 70.00th=[ 1334], 80.00th=[ 1334], 90.00th=[ 1334], 95.00th=[ 1334], | 99.00th=[ 1334], 99.50th=[ 1334], 99.90th=[ 1334], 99.95th=[ 1334], | 99.99th=[ 1334] bw ( KiB/s): min= 8143, max= 8175, per=100.00%, avg=8159.00, stdev=22.63, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=66.67%, 2000=33.33% cpu : usr=0.00%, sys=5.35%, ctx=59, majf=0, minf=7 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=180463: Sun Sep 6 01:25:39 2026 read: IOPS=0, BW=1413KiB/s (1447kB/s)(4096KiB/2898msec) clat (nsec): min=1124.2M, max=1124.2M, avg=1124166849.00, stdev= 0.00 lat (nsec): min=1124.2M, max=1124.2M, avg=1124170006.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1133], 5.00th=[ 1133], 10.00th=[ 1133], 20.00th=[ 1133], | 30.00th=[ 1133], 40.00th=[ 1133], 50.00th=[ 1133], 60.00th=[ 1133], | 70.00th=[ 1133], 80.00th=[ 1133], 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= 8143, max= 8143, per=100.00%, avg=8143.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2827KiB/s (2895kB/s)(8192KiB/2898msec); 0 zone resets clat (msec): min=366, max=1371, avg=868.85, stdev=710.99 lat (msec): min=366, max=1372, avg=869.47, stdev=711.52 clat percentiles (msec): | 1.00th=[ 368], 5.00th=[ 368], 10.00th=[ 368], 20.00th=[ 368], | 30.00th=[ 368], 40.00th=[ 368], 50.00th=[ 368], 60.00th=[ 1368], | 70.00th=[ 1368], 80.00th=[ 1368], 90.00th=[ 1368], 95.00th=[ 1368], | 99.00th=[ 1368], 99.50th=[ 1368], 99.90th=[ 1368], 99.95th=[ 1368], | 99.99th=[ 1368] bw ( KiB/s): min= 8110, max= 8110, per=71.73%, avg=8110.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 2000=66.67% cpu : usr=0.00%, sys=5.21%, ctx=66, 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=180464: Sun Sep 6 01:25:39 2026 write: IOPS=2, BW=8557KiB/s (8762kB/s)(12.0MiB/1436msec); 0 zone resets clat (msec): min=335, max=679, avg=460.31, stdev=190.72 lat (msec): min=337, max=680, avg=461.14, stdev=190.40 clat percentiles (msec): | 1.00th=[ 338], 5.00th=[ 338], 10.00th=[ 338], 20.00th=[ 338], | 30.00th=[ 338], 40.00th=[ 368], 50.00th=[ 368], 60.00th=[ 368], | 70.00th=[ 684], 80.00th=[ 684], 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= 5997, max= 8192, per=62.74%, avg=7094.50, stdev=1552.10, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 500=66.67%, 750=33.33% cpu : usr=0.07%, sys=11.22%, ctx=53, majf=0, minf=7 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=180465: Sun Sep 6 01:25:39 2026 write: IOPS=1, BW=5313KiB/s (5440kB/s)(12.0MiB/2313msec); 0 zone resets clat (msec): min=249, max=1472, avg=744.56, stdev=643.88 lat (msec): min=249, max=1472, avg=745.37, stdev=643.73 clat percentiles (msec): | 1.00th=[ 249], 5.00th=[ 249], 10.00th=[ 249], 20.00th=[ 249], | 30.00th=[ 249], 40.00th=[ 514], 50.00th=[ 514], 60.00th=[ 514], | 70.00th=[ 1469], 80.00th=[ 1469], 90.00th=[ 1469], 95.00th=[ 1469], | 99.00th=[ 1469], 99.50th=[ 1469], 99.90th=[ 1469], 99.95th=[ 1469], | 99.99th=[ 1469] bw ( KiB/s): min= 5785, max= 8192, per=61.81%, avg=6988.50, stdev=1702.01, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 250=33.33%, 750=33.33%, 2000=33.33% cpu : usr=0.00%, sys=7.09%, ctx=60, majf=0, minf=8 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=5654KiB/s (5789kB/s), 1413KiB/s-4498KiB/s (1447kB/s-4606kB/s), io=16.0MiB (16.8MB), run=2732-2898msec WRITE: bw=11.0MiB/s (11.6MB/s), 2827KiB/s-8557KiB/s (2895kB/s-8762kB/s), io=32.0MiB (33.6MB), run=1436-2898msec rand-rw: (groupid=0, jobs=1): err= 0: pid=180467: Sun Sep 6 01:25:39 2026 read: IOPS=1, BW=5931KiB/s (6073kB/s)(12.0MiB/2072msec) clat (msec): min=590, max=746, avg=668.94, stdev=77.64 lat (msec): min=591, max=746, avg=668.94, stdev=77.64 clat percentiles (msec): | 1.00th=[ 592], 5.00th=[ 592], 10.00th=[ 592], 20.00th=[ 592], | 30.00th=[ 592], 40.00th=[ 667], 50.00th=[ 667], 60.00th=[ 667], | 70.00th=[ 743], 80.00th=[ 743], 90.00th=[ 743], 95.00th=[ 743], | 99.00th=[ 743], 99.50th=[ 743], 99.90th=[ 743], 99.95th=[ 743], | 99.99th=[ 743] bw ( KiB/s): min= 7968, max= 8192, per=100.00%, avg=8080.00, stdev=158.39, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 750=100.00% cpu : usr=0.00%, sys=19.94%, ctx=410, 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=180468: Sun Sep 6 01:25:39 2026 read: IOPS=0, BW=1586KiB/s (1624kB/s)(4096KiB/2583msec) clat (nsec): min=788666k, max=788666k, avg=788665711.00, stdev= 0.00 lat (nsec): min=788668k, max=788668k, avg=788667978.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 793], 5.00th=[ 793], 10.00th=[ 793], 20.00th=[ 793], | 30.00th=[ 793], 40.00th=[ 793], 50.00th=[ 793], 60.00th=[ 793], | 70.00th=[ 793], 80.00th=[ 793], 90.00th=[ 793], 95.00th=[ 793], | 99.00th=[ 793], 99.50th=[ 793], 99.90th=[ 793], 99.95th=[ 793], | 99.99th=[ 793] bw ( KiB/s): min= 8192, max= 8192, per=100.00%, avg=8192.00, stdev= 0.00, samples=1 iops : min= 2, max= 2, avg= 2.00, stdev= 0.00, samples=1 write: IOPS=0, BW=3172KiB/s (3248kB/s)(8192KiB/2583msec); 0 zone resets clat (msec): min=807, max=913, avg=860.45, stdev=74.91 lat (msec): min=808, max=913, avg=861.39, stdev=74.19 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=[ 911], | 70.00th=[ 911], 80.00th=[ 911], 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= 8094, max= 8094, per=68.99%, avg=8094.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 1000=100.00% cpu : usr=0.00%, sys=9.99%, ctx=139, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1,2,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180469: Sun Sep 6 01:25:39 2026 write: IOPS=1, BW=4400KiB/s (4505kB/s)(12.0MiB/2793msec); 0 zone resets clat (msec): min=134, max=2186, avg=919.65, stdev=1107.90 lat (msec): min=135, max=2188, avg=920.29, stdev=1108.30 clat percentiles (msec): | 1.00th=[ 136], 5.00th=[ 136], 10.00th=[ 136], 20.00th=[ 136], | 30.00th=[ 136], 40.00th=[ 439], 50.00th=[ 439], 60.00th=[ 439], | 70.00th=[ 2198], 80.00th=[ 2198], 90.00th=[ 2198], 95.00th=[ 2198], | 99.00th=[ 2198], 99.50th=[ 2198], 99.90th=[ 2198], 99.95th=[ 2198], | 99.99th=[ 2198] bw ( KiB/s): min=16351, max=16351, per=100.00%, avg=16351.00, stdev= 0.00, samples=1 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=1 lat (msec) : 250=33.33%, 500=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=5.37%, ctx=54, 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=180470: Sun Sep 6 01:25:39 2026 write: IOPS=1, BW=5090KiB/s (5212kB/s)(12.0MiB/2414msec); 0 zone resets clat (msec): min=389, max=1477, avg=783.72, stdev=603.06 lat (msec): min=389, max=1479, avg=784.48, stdev=603.74 clat percentiles (msec): | 1.00th=[ 388], 5.00th=[ 388], 10.00th=[ 388], 20.00th=[ 388], | 30.00th=[ 388], 40.00th=[ 485], 50.00th=[ 485], 60.00th=[ 485], | 70.00th=[ 1485], 80.00th=[ 1485], 90.00th=[ 1485], 95.00th=[ 1485], | 99.00th=[ 1485], 99.50th=[ 1485], 99.90th=[ 1485], 99.95th=[ 1485], | 99.99th=[ 1485] bw ( KiB/s): min= 6481, max= 8078, per=62.05%, avg=7279.50, stdev=1129.25, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=66.67%, 2000=33.33% cpu : usr=0.00%, sys=7.71%, ctx=60, 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=6343KiB/s (6495kB/s), 1586KiB/s-5931KiB/s (1624kB/s-6073kB/s), io=16.0MiB (16.8MB), run=2072-2583msec WRITE: bw=11.5MiB/s (12.0MB/s), 3172KiB/s-5090KiB/s (3248kB/s-5212kB/s), io=32.0MiB (33.6MB), run=2414-2793msec