== sanity test 398b: DIO and buffer IO race ============== 02:25:57 (1787552757) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 5.2294 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=144533: Mon Aug 24 02:28:11 2026 read: IOPS=12, BW=51.0KiB/s (52.2kB/s)(5992KiB/117441msec) clat (usec): min=31, max=1114.9k, avg=37419.90, stdev=42738.69 lat (usec): min=32, max=1114.9k, avg=37422.24, stdev=42738.34 clat percentiles (usec): | 1.00th=[ 46], 5.00th=[ 55], 10.00th=[ 75], | 20.00th=[ 15270], 30.00th=[ 20317], 40.00th=[ 25297], | 50.00th=[ 30540], 60.00th=[ 37487], 70.00th=[ 45351], | 80.00th=[ 54264], 90.00th=[ 71828], 95.00th=[ 89654], | 99.00th=[ 156238], 99.50th=[ 198181], 99.90th=[ 534774], | 99.95th=[1115685], 99.99th=[1115685] bw ( KiB/s): min= 5, max= 119, per=25.02%, avg=50.80, stdev=22.93, samples=231 iops : min= 1, max= 29, avg=12.03, stdev= 5.76, samples=231 write: IOPS=13, BW=53.6KiB/s (54.9kB/s)(6296KiB/117441msec); 0 zone resets clat (usec): min=889, max=407893, avg=38671.21, stdev=40852.95 lat (usec): min=890, max=407893, avg=38676.54, stdev=40851.54 clat percentiles (usec): | 1.00th=[ 1020], 5.00th=[ 1139], 10.00th=[ 1500], 20.00th=[ 3425], | 30.00th=[ 7439], 40.00th=[ 17957], 50.00th=[ 28705], 60.00th=[ 39060], | 70.00th=[ 51643], 80.00th=[ 65799], 90.00th=[ 91751], 95.00th=[119014], | 99.00th=[173016], 99.50th=[204473], 99.90th=[367002], 99.95th=[408945], | 99.99th=[408945] bw ( KiB/s): min= 7, max= 150, per=25.38%, avg=53.80, stdev=23.87, samples=229 iops : min= 1, max= 37, avg=12.78, stdev= 5.99, samples=229 lat (usec) : 50=1.20%, 100=4.23%, 250=0.49%, 500=0.10%, 750=0.07% lat (usec) : 1000=0.29% lat (msec) : 2=6.71%, 4=4.13%, 10=6.48%, 20=11.72%, 50=36.82% lat (msec) : 100=22.14%, 250=5.47%, 500=0.10%, 750=0.03%, 2000=0.03% cpu : usr=0.08%, sys=5.58%, ctx=6484, 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=144534: Mon Aug 24 02:28:11 2026 read: IOPS=12, BW=51.9KiB/s (53.1kB/s)(5940KiB/114523msec) clat (usec): min=34, max=264720, avg=36022.74, stdev=29195.91 lat (usec): min=35, max=264721, avg=36032.51, stdev=29196.66 clat percentiles (usec): | 1.00th=[ 47], 5.00th=[ 56], 10.00th=[ 72], 20.00th=[ 15008], | 30.00th=[ 20317], 40.00th=[ 24773], 50.00th=[ 30016], 60.00th=[ 35914], | 70.00th=[ 44827], 80.00th=[ 55837], 90.00th=[ 71828], 95.00th=[ 86508], | 99.00th=[139461], 99.50th=[179307], 99.90th=[229639], 99.95th=[265290], | 99.99th=[265290] bw ( KiB/s): min= 5, max= 118, per=25.45%, avg=51.67, stdev=22.64, samples=225 iops : min= 1, max= 29, avg=12.25, stdev= 5.68, samples=225 write: IOPS=13, BW=55.4KiB/s (56.8kB/s)(6348KiB/114523msec); 0 zone resets clat (usec): min=965, max=1142.1k, avg=38125.20, stdev=49655.66 lat (usec): min=966, max=1142.1k, avg=38128.53, stdev=49654.90 clat percentiles (usec): | 1.00th=[ 1074], 5.00th=[ 1172], 10.00th=[ 1696], | 20.00th=[ 3818], 30.00th=[ 7111], 40.00th=[ 16450], | 50.00th=[ 26084], 60.00th=[ 35914], 70.00th=[ 46924], | 80.00th=[ 63177], 90.00th=[ 90702], 95.00th=[ 115868], | 99.00th=[ 189793], 99.50th=[ 250610], 99.90th=[ 329253], | 99.95th=[1149240], 99.99th=[1149240] bw ( KiB/s): min= 7, max= 128, per=26.18%, avg=55.50, stdev=23.60, samples=224 iops : min= 1, max= 32, avg=13.21, stdev= 5.96, samples=224 lat (usec) : 50=0.81%, 100=4.75%, 250=0.39%, 500=0.07%, 750=0.07% lat (usec) : 1000=0.16% lat (msec) : 2=6.05%, 4=4.62%, 10=7.49%, 20=12.60%, 50=36.52% lat (msec) : 100=21.22%, 250=4.98%, 500=0.23%, 2000=0.03% cpu : usr=0.07%, sys=5.45%, ctx=6371, 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=144536: Mon Aug 24 02:28:11 2026 read: IOPS=12, BW=50.0KiB/s (52.2kB/s)(6028KiB/118217msec) clat (usec): min=35, max=237661, avg=35623.10, stdev=26770.49 lat (usec): min=35, max=237662, avg=35626.47, stdev=26769.92 clat percentiles (usec): | 1.00th=[ 47], 5.00th=[ 56], 10.00th=[ 96], 20.00th=[ 15926], | 30.00th=[ 21103], 40.00th=[ 25297], 50.00th=[ 30016], 60.00th=[ 35914], | 70.00th=[ 44303], 80.00th=[ 55313], 90.00th=[ 70779], 95.00th=[ 83362], | 99.00th=[120062], 99.50th=[135267], 99.90th=[173016], 99.95th=[238027], | 99.99th=[238027] bw ( KiB/s): min= 7, max= 135, per=25.47%, avg=51.70, stdev=23.34, samples=227 iops : min= 1, max= 33, avg=12.25, stdev= 5.86, samples=227 write: IOPS=13, BW=52.0KiB/s (54.2kB/s)(6260KiB/118217msec); 0 zone resets clat (usec): min=976, max=1302.4k, avg=40899.99, stdev=53425.89 lat (usec): min=977, max=1302.4k, avg=40902.95, stdev=53424.90 clat percentiles (usec): | 1.00th=[ 1037], 5.00th=[ 1172], 10.00th=[ 1663], | 20.00th=[ 3818], 30.00th=[ 8160], 40.00th=[ 17695], | 50.00th=[ 27657], 60.00th=[ 39060], 70.00th=[ 50594], | 80.00th=[ 70779], 90.00th=[ 98042], 95.00th=[ 124257], | 99.00th=[ 183501], 99.50th=[ 212861], 99.90th=[ 350225], | 99.95th=[1300235], 99.99th=[1300235] bw ( KiB/s): min= 7, max= 135, per=24.97%, avg=52.93, stdev=24.28, samples=230 iops : min= 1, max= 33, avg=12.56, stdev= 6.08, samples=230 lat (usec) : 50=0.94%, 100=3.97%, 250=0.52%, 500=0.03%, 750=0.07% lat (usec) : 1000=0.16% lat (msec) : 2=6.12%, 4=4.65%, 10=6.84%, 20=11.56%, 50=37.99% lat (msec) : 100=21.09%, 250=5.92%, 500=0.10%, 2000=0.03% cpu : usr=0.08%, sys=5.52%, ctx=6398, 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=144539: Mon Aug 24 02:28:11 2026 read: IOPS=13, BW=52.3KiB/s (53.5kB/s)(6052KiB/115791msec) clat (usec): min=28, max=338672, avg=36172.65, stdev=29841.91 lat (usec): min=29, max=338673, avg=36176.56, stdev=29842.07 clat percentiles (usec): | 1.00th=[ 40], 5.00th=[ 53], 10.00th=[ 68], 20.00th=[ 15401], | 30.00th=[ 20317], 40.00th=[ 25297], 50.00th=[ 30016], 60.00th=[ 36439], | 70.00th=[ 44303], 80.00th=[ 55313], 90.00th=[ 71828], 95.00th=[ 88605], | 99.00th=[137364], 99.50th=[166724], 99.90th=[240124], 99.95th=[337642], | 99.99th=[337642] bw ( KiB/s): min= 7, max= 119, per=25.90%, avg=52.58, stdev=22.78, samples=225 iops : min= 1, max= 29, avg=12.48, stdev= 5.74, samples=225 write: IOPS=13, BW=53.9KiB/s (55.1kB/s)(6236KiB/115791msec); 0 zone resets clat (usec): min=878, max=1103.0k, avg=38823.33, stdev=48240.47 lat (usec): min=879, max=1103.0k, avg=38828.61, stdev=48243.76 clat percentiles (usec): | 1.00th=[ 1057], 5.00th=[ 1188], 10.00th=[ 1614], | 20.00th=[ 3392], 30.00th=[ 7308], 40.00th=[ 16909], | 50.00th=[ 28181], 60.00th=[ 39060], 70.00th=[ 50594], | 80.00th=[ 66323], 90.00th=[ 90702], 95.00th=[ 112722], | 99.00th=[ 175113], 99.50th=[ 225444], 99.90th=[ 291505], | 99.95th=[1098908], 99.99th=[1098908] bw ( KiB/s): min= 5, max= 143, per=25.30%, avg=53.63, stdev=23.09, samples=227 iops : min= 1, max= 35, avg=12.75, stdev= 5.81, samples=227 lat (usec) : 50=1.46%, 100=4.43%, 250=0.42%, 500=0.10%, 750=0.03% lat (usec) : 1000=0.29% lat (msec) : 2=6.22%, 4=4.65%, 10=6.67%, 20=11.85%, 50=35.94% lat (msec) : 100=22.33%, 250=5.40%, 500=0.16%, 2000=0.03% cpu : usr=0.08%, sys=5.56%, ctx=6343, majf=0, minf=20 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=203KiB/s (208kB/s), 50.0KiB/s-52.3KiB/s (52.2kB/s-53.5kB/s), io=23.4MiB (24.6MB), run=114523-118217msec WRITE: bw=213KiB/s (218kB/s), 52.0KiB/s-55.4KiB/s (54.2kB/s-56.8kB/s), io=24.6MiB (25.7MB), run=114523-118217msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144532: Mon Aug 24 02:30:35 2026 read: IOPS=5, BW=23.0KiB/s (23.6kB/s)(5992KiB/260124msec) clat (msec): min=4, max=1156, avg=31.54, stdev=43.36 lat (msec): min=4, max=1156, avg=31.54, stdev=43.36 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 10], 20.00th=[ 12], | 30.00th=[ 15], 40.00th=[ 18], 50.00th=[ 21], 60.00th=[ 25], | 70.00th=[ 31], 80.00th=[ 41], 90.00th=[ 68], 95.00th=[ 96], | 99.00th=[ 136], 99.50th=[ 178], 99.90th=[ 477], 99.95th=[ 1150], | 99.99th=[ 1150] bw ( KiB/s): min= 7, max= 96, per=27.82%, avg=25.32, stdev=16.95, samples=458 iops : min= 1, max= 24, avg= 5.74, stdev= 4.29, samples=458 write: IOPS=6, BW=24.2KiB/s (24.8kB/s)(6296KiB/260124msec); 0 zone resets clat (msec): min=39, max=516, avg=134.95, stdev=63.37 lat (msec): min=39, max=516, avg=134.96, stdev=63.37 clat percentiles (msec): | 1.00th=[ 47], 5.00th=[ 62], 10.00th=[ 72], 20.00th=[ 85], | 30.00th=[ 96], 40.00th=[ 109], 50.00th=[ 122], 60.00th=[ 136], | 70.00th=[ 153], 80.00th=[ 176], 90.00th=[ 218], 95.00th=[ 247], | 99.00th=[ 347], 99.50th=[ 426], 99.90th=[ 514], 99.95th=[ 518], | 99.99th=[ 518] bw ( KiB/s): min= 7, max= 64, per=25.17%, avg=23.91, stdev=10.23, samples=508 iops : min= 1, max= 16, avg= 5.38, stdev= 2.62, samples=508 lat (msec) : 10=5.14%, 20=18.98%, 50=18.16%, 100=21.55%, 250=33.50% lat (msec) : 500=2.57%, 750=0.07%, 2000=0.03% cpu : usr=0.04%, sys=1.05%, ctx=5067, 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=144535: Mon Aug 24 02:30:35 2026 read: IOPS=5, BW=22.6KiB/s (23.2kB/s)(5940KiB/262363msec) clat (msec): min=5, max=1159, avg=31.23, stdev=42.14 lat (msec): min=5, max=1159, avg=31.23, stdev=42.14 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 10], 20.00th=[ 13], | 30.00th=[ 16], 40.00th=[ 18], 50.00th=[ 21], 60.00th=[ 25], | 70.00th=[ 31], 80.00th=[ 41], 90.00th=[ 66], 95.00th=[ 87], | 99.00th=[ 129], 99.50th=[ 153], 99.90th=[ 542], 99.95th=[ 1167], | 99.99th=[ 1167] bw ( KiB/s): min= 7, max= 102, per=28.26%, avg=25.72, stdev=17.58, samples=447 iops : min= 1, max= 25, avg= 5.84, stdev= 4.43, samples=447 write: IOPS=6, BW=24.2KiB/s (24.8kB/s)(6348KiB/262363msec); 0 zone resets clat (msec): min=28, max=620, avg=135.81, stdev=62.83 lat (msec): min=28, max=620, avg=135.81, stdev=62.83 clat percentiles (msec): | 1.00th=[ 48], 5.00th=[ 63], 10.00th=[ 72], 20.00th=[ 85], | 30.00th=[ 97], 40.00th=[ 111], 50.00th=[ 124], 60.00th=[ 138], | 70.00th=[ 157], 80.00th=[ 178], 90.00th=[ 220], 95.00th=[ 253], | 99.00th=[ 342], 99.50th=[ 388], 99.90th=[ 510], 99.95th=[ 617], | 99.99th=[ 617] bw ( KiB/s): min= 7, max= 71, per=25.06%, avg=23.80, stdev=10.18, samples=515 iops : min= 1, max= 17, avg= 5.36, stdev= 2.60, samples=515 lat (msec) : 10=4.95%, 20=18.13%, 50=18.62%, 100=21.78%, 250=33.63% lat (msec) : 500=2.77%, 750=0.10%, 2000=0.03% cpu : usr=0.04%, sys=1.08%, ctx=5181, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1485,1587,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144537: Mon Aug 24 02:30:35 2026 read: IOPS=5, BW=23.0KiB/s (23.6kB/s)(6028KiB/261886msec) clat (msec): min=5, max=530, avg=32.83, stdev=34.12 lat (msec): min=5, max=530, avg=32.84, stdev=34.12 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 10], 20.00th=[ 13], | 30.00th=[ 16], 40.00th=[ 18], 50.00th=[ 22], 60.00th=[ 26], | 70.00th=[ 33], 80.00th=[ 46], 90.00th=[ 72], 95.00th=[ 97], | 99.00th=[ 148], 99.50th=[ 184], 99.90th=[ 384], 99.95th=[ 531], | 99.99th=[ 531] bw ( KiB/s): min= 7, max= 102, per=27.89%, avg=25.38, stdev=17.40, samples=460 iops : min= 1, max= 25, avg= 5.76, stdev= 4.39, samples=460 write: IOPS=5, BW=23.9KiB/s (24.5kB/s)(6260KiB/261886msec); 0 zone resets clat (msec): min=35, max=1304, avg=135.42, stdev=69.28 lat (msec): min=35, max=1304, avg=135.43, stdev=69.28 clat percentiles (msec): | 1.00th=[ 50], 5.00th=[ 62], 10.00th=[ 70], 20.00th=[ 85], | 30.00th=[ 96], 40.00th=[ 111], 50.00th=[ 123], 60.00th=[ 136], | 70.00th=[ 153], 80.00th=[ 176], 90.00th=[ 213], 95.00th=[ 257], | 99.00th=[ 342], 99.50th=[ 418], 99.90th=[ 542], 99.95th=[ 1301], | 99.99th=[ 1301] bw ( KiB/s): min= 7, max= 55, per=24.92%, avg=23.67, stdev=10.31, samples=511 iops : min= 1, max= 13, avg= 5.32, stdev= 2.65, samples=511 lat (msec) : 10=5.18%, 20=17.64%, 50=18.00%, 100=22.88%, 250=33.40% lat (msec) : 500=2.77%, 750=0.10%, 2000=0.03% cpu : usr=0.04%, sys=1.08%, ctx=5067, 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=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=144538: Mon Aug 24 02:30:35 2026 read: IOPS=5, BW=23.3KiB/s (23.9kB/s)(6052KiB/259748msec) clat (msec): min=5, max=486, avg=31.45, stdev=31.42 lat (msec): min=5, max=486, avg=31.45, stdev=31.42 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 8], 10.00th=[ 10], 20.00th=[ 12], | 30.00th=[ 15], 40.00th=[ 18], 50.00th=[ 21], 60.00th=[ 25], | 70.00th=[ 32], 80.00th=[ 46], 90.00th=[ 69], 95.00th=[ 99], | 99.00th=[ 140], 99.50th=[ 171], 99.90th=[ 300], 99.95th=[ 485], | 99.99th=[ 485] bw ( KiB/s): min= 7, max= 104, per=29.06%, avg=26.44, stdev=17.40, samples=444 iops : min= 1, max= 26, avg= 6.01, stdev= 4.39, samples=444 write: IOPS=6, BW=24.0KiB/s (24.6kB/s)(6236KiB/259748msec); 0 zone resets clat (msec): min=37, max=1216, avg=135.77, stdev=68.21 lat (msec): min=37, max=1216, avg=135.77, stdev=68.21 clat percentiles (msec): | 1.00th=[ 47], 5.00th=[ 61], 10.00th=[ 70], 20.00th=[ 86], | 30.00th=[ 99], 40.00th=[ 110], 50.00th=[ 124], 60.00th=[ 136], | 70.00th=[ 155], 80.00th=[ 178], 90.00th=[ 215], 95.00th=[ 255], | 99.00th=[ 359], 99.50th=[ 393], 99.90th=[ 514], 99.95th=[ 1217], | 99.99th=[ 1217] bw ( KiB/s): min= 7, max= 56, per=24.83%, avg=23.59, stdev=10.10, samples=511 iops : min= 1, max= 14, avg= 5.30, stdev= 2.59, samples=511 lat (msec) : 10=6.18%, 20=17.38%, 50=18.29%, 100=21.29%, 250=34.08% lat (msec) : 500=2.67%, 750=0.07%, 2000=0.03% cpu : usr=0.04%, sys=1.08%, ctx=5112, 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=91.5KiB/s (93.7kB/s), 22.6KiB/s-23.3KiB/s (23.2kB/s-23.9kB/s), io=23.4MiB (24.6MB), run=259748-262363msec WRITE: bw=95.8KiB/s (98.1kB/s), 23.9KiB/s-24.2KiB/s (24.5kB/s-24.8kB/s), io=24.6MiB (25.7MB), run=259748-262363msec 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=144593: Mon Aug 24 02:31:13 2026 read: IOPS=14, BW=235KiB/s (241kB/s)(5920KiB/25157msec) clat (usec): min=32, max=155774, avg=36046.73, stdev=29518.98 lat (usec): min=33, max=155775, avg=36047.91, stdev=29518.88 clat percentiles (usec): | 1.00th=[ 40], 5.00th=[ 52], 10.00th=[ 58], 20.00th=[ 145], | 30.00th=[ 19268], 40.00th=[ 26346], 50.00th=[ 33817], 60.00th=[ 40633], | 70.00th=[ 47449], 80.00th=[ 57410], 90.00th=[ 70779], 95.00th=[ 92799], | 99.00th=[131597], 99.50th=[137364], 99.90th=[156238], 99.95th=[156238], | 99.99th=[156238] bw ( KiB/s): min= 125, max= 505, per=27.12%, avg=235.96, stdev=93.57, samples=49 iops : min= 7, max= 31, avg=14.02, stdev= 5.88, samples=49 write: IOPS=15, BW=253KiB/s (259kB/s)(6368KiB/25157msec); 0 zone resets clat (usec): min=1347, max=157896, avg=28990.36, stdev=31252.34 lat (usec): min=1348, max=157898, avg=28997.38, stdev=31249.17 clat percentiles (usec): | 1.00th=[ 1450], 5.00th=[ 1614], 10.00th=[ 1942], 20.00th=[ 4490], | 30.00th=[ 6521], 40.00th=[ 10421], 50.00th=[ 16909], 60.00th=[ 25297], | 70.00th=[ 36963], 80.00th=[ 52167], 90.00th=[ 74974], 95.00th=[ 91751], | 99.00th=[152044], 99.50th=[156238], 99.90th=[158335], 99.95th=[158335], | 99.99th=[158335] bw ( KiB/s): min= 111, max= 597, per=27.84%, avg=255.04, stdev=106.10, samples=49 iops : min= 6, max= 37, avg=15.20, stdev= 6.69, samples=49 lat (usec) : 50=1.56%, 100=7.29%, 250=1.43%, 500=0.13%, 750=0.13% lat (msec) : 2=5.47%, 4=4.30%, 10=10.68%, 20=11.98%, 50=32.94% lat (msec) : 100=20.18%, 250=3.91% cpu : usr=0.08%, sys=6.88%, ctx=1407, 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=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=144594: Mon Aug 24 02:31:13 2026 read: IOPS=13, BW=209KiB/s (214kB/s)(5744KiB/27504msec) clat (usec): min=38, max=186425, avg=40261.76, stdev=32059.49 lat (usec): min=39, max=186426, avg=40262.94, stdev=32059.50 clat percentiles (usec): | 1.00th=[ 43], 5.00th=[ 59], 10.00th=[ 64], 20.00th=[ 12649], | 30.00th=[ 23725], 40.00th=[ 31589], 50.00th=[ 37487], 60.00th=[ 43779], | 70.00th=[ 50594], 80.00th=[ 62129], 90.00th=[ 82314], 95.00th=[100140], | 99.00th=[160433], 99.50th=[175113], 99.90th=[185598], 99.95th=[185598], | 99.99th=[185598] bw ( KiB/s): min= 45, max= 413, per=24.06%, avg=209.30, stdev=78.83, samples=53 iops : min= 2, max= 25, avg=12.30, stdev= 4.96, samples=53 write: IOPS=14, BW=238KiB/s (244kB/s)(6544KiB/27504msec); 0 zone resets clat (usec): min=1281, max=162887, avg=31243.03, stdev=33473.65 lat (usec): min=1282, max=162889, avg=31246.35, stdev=33473.82 clat percentiles (usec): | 1.00th=[ 1450], 5.00th=[ 1729], 10.00th=[ 2376], 20.00th=[ 4293], | 30.00th=[ 6521], 40.00th=[ 10159], 50.00th=[ 16712], 60.00th=[ 27132], | 70.00th=[ 39584], 80.00th=[ 58983], 90.00th=[ 83362], 95.00th=[100140], | 99.00th=[137364], 99.50th=[141558], 99.90th=[162530], 99.95th=[162530], | 99.99th=[162530] bw ( KiB/s): min= 31, max= 573, per=25.96%, avg=237.81, stdev=101.59, samples=53 iops : min= 1, max= 35, avg=14.11, stdev= 6.42, samples=53 lat (usec) : 50=0.78%, 100=7.03%, 250=0.52% lat (msec) : 2=4.43%, 4=5.86%, 10=11.59%, 20=10.68%, 50=31.38% lat (msec) : 100=22.40%, 250=5.34% cpu : usr=0.11%, sys=6.41%, ctx=1437, 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=144595: Mon Aug 24 02:31:13 2026 read: IOPS=14, BW=228KiB/s (233kB/s)(6256KiB/27476msec) clat (usec): min=35, max=240384, avg=36269.64, stdev=32108.70 lat (usec): min=36, max=240385, avg=36270.89, stdev=32108.77 clat percentiles (usec): | 1.00th=[ 40], 5.00th=[ 54], 10.00th=[ 62], 20.00th=[ 110], | 30.00th=[ 21103], 40.00th=[ 27657], 50.00th=[ 32637], 60.00th=[ 39060], | 70.00th=[ 46924], 80.00th=[ 56361], 90.00th=[ 71828], 95.00th=[ 91751], | 99.00th=[162530], 99.50th=[210764], 99.90th=[240124], 99.95th=[240124], | 99.99th=[240124] bw ( KiB/s): min= 63, max= 503, per=26.55%, avg=230.96, stdev=106.69, samples=53 iops : min= 3, max= 31, avg=13.68, stdev= 6.70, samples=53 write: IOPS=13, BW=220KiB/s (225kB/s)(6032KiB/27476msec); 0 zone resets clat (usec): min=1332, max=173322, avg=34591.76, stdev=36256.97 lat (usec): min=1333, max=173324, avg=34593.59, stdev=36256.99 clat percentiles (usec): | 1.00th=[ 1450], 5.00th=[ 1663], 10.00th=[ 1926], 20.00th=[ 4015], | 30.00th=[ 7177], 40.00th=[ 12649], 50.00th=[ 20841], 60.00th=[ 32113], | 70.00th=[ 46400], 80.00th=[ 62129], 90.00th=[ 90702], 95.00th=[110625], | 99.00th=[143655], 99.50th=[145753], 99.90th=[173016], 99.95th=[173016], | 99.99th=[173016] bw ( KiB/s): min= 64, max= 541, per=23.91%, avg=219.02, stdev=85.63, samples=53 iops : min= 4, max= 33, avg=12.94, stdev= 5.36, samples=53 lat (usec) : 50=1.30%, 100=8.07%, 250=1.82%, 1000=0.13% lat (msec) : 2=4.95%, 4=4.95%, 10=7.55%, 20=10.29%, 50=33.72% lat (msec) : 100=22.14%, 250=5.08% cpu : usr=0.06%, sys=6.60%, ctx=1507, 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=144596: Mon Aug 24 02:31:13 2026 read: IOPS=14, BW=228KiB/s (233kB/s)(6032KiB/26497msec) clat (usec): min=36, max=267203, avg=40042.44, stdev=33692.02 lat (usec): min=37, max=267204, avg=40043.71, stdev=33691.99 clat percentiles (usec): | 1.00th=[ 42], 5.00th=[ 56], 10.00th=[ 63], 20.00th=[ 881], | 30.00th=[ 22152], 40.00th=[ 28967], 50.00th=[ 36963], 60.00th=[ 42730], | 70.00th=[ 52691], 80.00th=[ 65274], 90.00th=[ 80217], 95.00th=[ 99091], | 99.00th=[127402], 99.50th=[202376], 99.90th=[267387], 99.95th=[267387], | 99.99th=[267387] bw ( KiB/s): min= 94, max= 604, per=26.00%, avg=226.22, stdev=113.48, samples=51 iops : min= 5, max= 37, avg=13.37, stdev= 7.12, samples=51 write: IOPS=14, BW=236KiB/s (242kB/s)(6256KiB/26497msec); 0 zone resets clat (usec): min=1325, max=225632, avg=28944.04, stdev=33563.29 lat (usec): min=1326, max=225635, avg=28950.26, stdev=33560.93 clat percentiles (usec): | 1.00th=[ 1450], 5.00th=[ 1663], 10.00th=[ 2442], 20.00th=[ 3982], | 30.00th=[ 7046], 40.00th=[ 10159], 50.00th=[ 15664], 60.00th=[ 24773], | 70.00th=[ 32900], 80.00th=[ 49021], 90.00th=[ 73925], 95.00th=[ 98042], | 99.00th=[154141], 99.50th=[191890], 99.90th=[225444], 99.95th=[225444], | 99.99th=[225444] bw ( KiB/s): min= 31, max= 508, per=25.69%, avg=235.31, stdev=102.98, samples=51 iops : min= 1, max= 31, avg=13.94, stdev= 6.50, samples=51 lat (usec) : 50=0.91%, 100=7.68%, 250=0.65%, 500=0.26%, 750=0.26% lat (usec) : 1000=0.13% lat (msec) : 2=4.56%, 4=6.12%, 10=10.16%, 20=10.68%, 50=33.07% lat (msec) : 100=20.96%, 250=4.43%, 500=0.13% cpu : usr=0.11%, sys=6.63%, ctx=1430, 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=871KiB/s (892kB/s), 209KiB/s-235KiB/s (214kB/s-241kB/s), io=23.4MiB (24.5MB), run=25157-27504msec WRITE: bw=916KiB/s (938kB/s), 220KiB/s-253KiB/s (225kB/s-259kB/s), io=24.6MiB (25.8MB), run=25157-27504msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144598: Mon Aug 24 02:31:52 2026 read: IOPS=5, BW=90.8KiB/s (92.0kB/s)(5920KiB/65206msec) clat (msec): min=7, max=333, avg=35.08, stdev=37.41 lat (msec): min=7, max=333, avg=35.08, stdev=37.41 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 21], 50.00th=[ 24], 60.00th=[ 28], | 70.00th=[ 34], 80.00th=[ 44], 90.00th=[ 72], 95.00th=[ 102], | 99.00th=[ 199], 99.50th=[ 305], 99.90th=[ 334], 99.95th=[ 334], | 99.99th=[ 334] bw ( KiB/s): min= 31, max= 350, per=27.82%, avg=100.72, stdev=61.27, samples=116 iops : min= 1, max= 21, avg= 5.52, stdev= 3.94, samples=116 write: IOPS=6, BW=97.7KiB/s (100kB/s)(6368KiB/65206msec); 0 zone resets clat (msec): min=44, max=384, avg=131.07, stdev=61.53 lat (msec): min=44, max=384, avg=131.08, stdev=61.53 clat percentiles (msec): | 1.00th=[ 48], 5.00th=[ 62], 10.00th=[ 68], 20.00th=[ 82], | 30.00th=[ 93], 40.00th=[ 105], 50.00th=[ 115], 60.00th=[ 131], | 70.00th=[ 150], 80.00th=[ 167], 90.00th=[ 211], 95.00th=[ 262], | 99.00th=[ 363], 99.50th=[ 368], 99.90th=[ 384], 99.95th=[ 384], | 99.99th=[ 384] bw ( KiB/s): min= 26, max= 224, per=25.53%, avg=97.29, stdev=44.83, samples=129 iops : min= 1, max= 14, avg= 5.30, stdev= 2.90, samples=129 lat (msec) : 10=3.39%, 20=15.89%, 50=21.74%, 100=23.70%, 250=31.77% lat (msec) : 500=3.52% cpu : usr=0.03%, sys=1.22%, ctx=1360, 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=144599: Mon Aug 24 02:31:52 2026 read: IOPS=5, BW=86.9KiB/s (88.0kB/s)(5744KiB/66110msec) clat (msec): min=6, max=333, avg=37.39, stdev=38.85 lat (msec): min=6, max=333, avg=37.39, stdev=38.85 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 17], 40.00th=[ 20], 50.00th=[ 24], 60.00th=[ 28], | 70.00th=[ 35], 80.00th=[ 47], 90.00th=[ 95], 95.00th=[ 122], | 99.00th=[ 190], 99.50th=[ 201], 99.90th=[ 334], 99.95th=[ 334], | 99.99th=[ 334] bw ( KiB/s): min= 27, max= 352, per=28.64%, avg=103.67, stdev=65.77, samples=108 iops : min= 1, max= 22, avg= 5.72, stdev= 4.18, samples=108 write: IOPS=6, BW=98.0KiB/s (101kB/s)(6544KiB/66110msec); 0 zone resets clat (msec): min=38, max=464, avg=128.64, stdev=64.41 lat (msec): min=38, max=464, avg=128.64, stdev=64.41 clat percentiles (msec): | 1.00th=[ 48], 5.00th=[ 58], 10.00th=[ 66], 20.00th=[ 79], | 30.00th=[ 90], 40.00th=[ 102], 50.00th=[ 111], 60.00th=[ 127], | 70.00th=[ 148], 80.00th=[ 174], 90.00th=[ 207], 95.00th=[ 239], | 99.00th=[ 342], 99.50th=[ 418], 99.90th=[ 464], 99.95th=[ 464], | 99.99th=[ 464] bw ( KiB/s): min= 27, max= 224, per=25.92%, avg=98.76, stdev=46.14, samples=129 iops : min= 1, max= 14, avg= 5.40, stdev= 2.97, samples=129 lat (msec) : 10=2.60%, 20=16.93%, 50=19.01%, 100=25.39%, 250=33.72% lat (msec) : 500=2.34% cpu : usr=0.04%, sys=1.29%, ctx=1304, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=359,409,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144600: Mon Aug 24 02:31:52 2026 read: IOPS=6, BW=97.6KiB/s (99.9kB/s)(6256KiB/64127msec) clat (msec): min=5, max=218, avg=33.15, stdev=32.37 lat (msec): min=5, max=218, avg=33.15, stdev=32.37 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 11], 10.00th=[ 12], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 20], 50.00th=[ 23], 60.00th=[ 27], | 70.00th=[ 33], 80.00th=[ 41], 90.00th=[ 64], 95.00th=[ 100], | 99.00th=[ 199], 99.50th=[ 211], 99.90th=[ 220], 99.95th=[ 220], | 99.99th=[ 220] bw ( KiB/s): min= 30, max= 448, per=29.36%, avg=106.28, stdev=74.33, samples=116 iops : min= 1, max= 28, avg= 5.85, stdev= 4.75, samples=116 write: IOPS=5, BW=94.1KiB/s (96.3kB/s)(6032KiB/64127msec); 0 zone resets clat (msec): min=38, max=420, avg=135.59, stdev=68.13 lat (msec): min=38, max=420, avg=135.60, stdev=68.13 clat percentiles (msec): | 1.00th=[ 44], 5.00th=[ 55], 10.00th=[ 70], 20.00th=[ 84], | 30.00th=[ 93], 40.00th=[ 106], 50.00th=[ 116], 60.00th=[ 134], | 70.00th=[ 157], 80.00th=[ 188], 90.00th=[ 228], 95.00th=[ 262], | 99.00th=[ 405], 99.50th=[ 418], 99.90th=[ 422], 99.95th=[ 422], | 99.99th=[ 422] bw ( KiB/s): min= 26, max= 192, per=25.08%, avg=95.54, stdev=43.57, samples=123 iops : min= 1, max= 12, avg= 5.19, stdev= 2.80, samples=123 lat (msec) : 10=2.73%, 20=18.23%, 50=23.57%, 100=21.61%, 250=30.60% lat (msec) : 500=3.26% cpu : usr=0.04%, sys=1.29%, ctx=1374, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144601: Mon Aug 24 02:31:52 2026 read: IOPS=5, BW=91.8KiB/s (94.0kB/s)(6032KiB/65682msec) clat (msec): min=6, max=300, avg=36.04, stdev=38.44 lat (msec): min=6, max=300, avg=36.04, stdev=38.44 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 15], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 24], 60.00th=[ 27], | 70.00th=[ 32], 80.00th=[ 44], 90.00th=[ 75], 95.00th=[ 113], | 99.00th=[ 207], 99.50th=[ 230], 99.90th=[ 300], 99.95th=[ 300], | 99.99th=[ 300] bw ( KiB/s): min= 30, max= 318, per=28.33%, avg=102.55, stdev=66.02, samples=116 iops : min= 1, max= 19, avg= 5.62, stdev= 4.19, samples=116 write: IOPS=5, BW=95.2KiB/s (97.5kB/s)(6256KiB/65682msec); 0 zone resets clat (msec): min=40, max=420, avg=133.03, stdev=63.39 lat (msec): min=40, max=420, avg=133.04, stdev=63.39 clat percentiles (msec): | 1.00th=[ 50], 5.00th=[ 61], 10.00th=[ 69], 20.00th=[ 82], | 30.00th=[ 93], 40.00th=[ 105], 50.00th=[ 118], 60.00th=[ 138], | 70.00th=[ 150], 80.00th=[ 174], 90.00th=[ 215], 95.00th=[ 275], | 99.00th=[ 338], 99.50th=[ 397], 99.90th=[ 422], 99.95th=[ 422], | 99.99th=[ 422] bw ( KiB/s): min= 31, max= 192, per=26.15%, avg=99.63, stdev=40.68, samples=124 iops : min= 1, max= 12, avg= 5.46, stdev= 2.65, samples=124 lat (msec) : 10=2.21%, 20=17.19%, 50=21.88%, 100=22.79%, 250=32.68% lat (msec) : 500=3.26% cpu : usr=0.05%, sys=1.42%, ctx=1365, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=362KiB/s (371kB/s), 86.9KiB/s-97.6KiB/s (88.0kB/s-99.9kB/s), io=23.4MiB (24.5MB), run=64127-66110msec WRITE: bw=381KiB/s (390kB/s), 94.1KiB/s-98.0KiB/s (96.3kB/s-101kB/s), io=24.6MiB (25.8MB), run=64127-66110msec 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=144620: Mon Aug 24 02:32:09 2026 read: IOPS=1, BW=1201KiB/s (1230kB/s)(7168KiB/5967msec) clat (msec): min=91, max=2839, avg=554.21, stdev=1016.20 lat (msec): min=91, max=2839, avg=554.21, stdev=1016.20 clat percentiles (msec): | 1.00th=[ 91], 5.00th=[ 91], 10.00th=[ 91], 20.00th=[ 95], | 30.00th=[ 105], 40.00th=[ 105], 50.00th=[ 129], 60.00th=[ 161], | 70.00th=[ 161], 80.00th=[ 460], 90.00th=[ 2836], 95.00th=[ 2836], | 99.00th=[ 2836], 99.50th=[ 2836], 99.90th=[ 2836], 99.95th=[ 2836], | 99.99th=[ 2836] bw ( KiB/s): min= 1943, max= 5953, per=100.00%, avg=3997.33, stdev=2006.82, samples=3 iops : min= 1, max= 5, avg= 3.33, stdev= 2.08, samples=3 write: IOPS=0, BW=858KiB/s (879kB/s)(5120KiB/5967msec); 0 zone resets clat (msec): min=166, max=791, avg=408.78, stdev=276.77 lat (msec): min=167, max=791, avg=409.03, stdev=276.66 clat percentiles (msec): | 1.00th=[ 167], 5.00th=[ 167], 10.00th=[ 167], 20.00th=[ 167], | 30.00th=[ 209], 40.00th=[ 209], 50.00th=[ 268], 60.00th=[ 268], | 70.00th=[ 609], 80.00th=[ 609], 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= 1980, max= 4096, per=58.90%, avg=2535.50, stdev=1040.63, samples=4 iops : min= 1, max= 4, avg= 1.75, stdev= 1.50, samples=4 lat (msec) : 100=16.67%, 250=41.67%, 500=16.67%, 750=8.33%, 1000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=2.95%, ctx=76, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=7,5,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144621: Mon Aug 24 02:32:09 2026 read: IOPS=0, BW=308KiB/s (315kB/s)(2048KiB/6660msec) clat (msec): min=111, max=393, avg=252.70, stdev=199.32 lat (msec): min=111, max=393, avg=252.70, stdev=199.32 clat percentiles (msec): | 1.00th=[ 112], 5.00th=[ 112], 10.00th=[ 112], 20.00th=[ 112], | 30.00th=[ 112], 40.00th=[ 112], 50.00th=[ 112], 60.00th=[ 393], | 70.00th=[ 393], 80.00th=[ 393], 90.00th=[ 393], 95.00th=[ 393], | 99.00th=[ 393], 99.50th=[ 393], 99.90th=[ 393], 99.95th=[ 393], | 99.99th=[ 393] bw ( KiB/s): min= 1924, max= 1980, per=63.48%, avg=1952.00, stdev=39.60, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1538KiB/s (1574kB/s)(10.0MiB/6660msec); 0 zone resets clat (msec): min=149, max=3540, avg=604.56, stdev=1035.83 lat (msec): min=149, max=3541, avg=604.65, stdev=1035.83 clat percentiles (msec): | 1.00th=[ 150], 5.00th=[ 150], 10.00th=[ 150], 20.00th=[ 176], | 30.00th=[ 203], 40.00th=[ 236], 50.00th=[ 259], 60.00th=[ 317], | 70.00th=[ 372], 80.00th=[ 372], 90.00th=[ 426], 95.00th=[ 3540], | 99.00th=[ 3540], 99.50th=[ 3540], 99.90th=[ 3540], 99.95th=[ 3540], | 99.99th=[ 3540] bw ( KiB/s): min= 2039, max= 4096, per=84.49%, avg=3637.40, stdev=897.80, samples=5 iops : min= 1, max= 4, avg= 2.80, stdev= 1.10, samples=5 lat (msec) : 250=41.67%, 500=50.00%, >=2000=8.33% cpu : usr=0.02%, sys=3.86%, ctx=105, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=2,10,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144622: Mon Aug 24 02:32:09 2026 read: IOPS=0, BW=953KiB/s (976kB/s)(6144KiB/6448msec) rand-rw: (groupid=0, jobs=1): err= 0: pid=144625: Mon Aug 24 02:32:09 2026 read: IOPS=1, BW=1211KiB/s (1240kB/s)(7168KiB/5918msec) clat (usec): min=850, max=3215.2k, avg=628012.29, stdev=1151157.10 lat (usec): min=851, max=3215.2k, avg=628013.56, stdev=1151157.20 clat percentiles (usec): | 1.00th=[ 848], 5.00th=[ 848], 10.00th=[ 848], | 20.00th=[ 3261], 30.00th=[ 170918], 40.00th=[ 170918], | 50.00th=[ 283116], 60.00th=[ 320865], 70.00th=[ 320865], | 80.00th=[ 404751], 90.00th=[3204449], 95.00th=[3204449], | 99.00th=[3204449], 99.50th=[3204449], 99.90th=[3204449], | 99.95th=[3204449], 99.99th=[3204449] bw ( KiB/s): min= 2039, max= 4047, per=98.11%, avg=3367.00, stdev=1150.19, samples=3 iops : min= 1, max= 3, avg= 2.33, stdev= 1.15, samples=3 write: IOPS=0, BW=865KiB/s (886kB/s)(5120KiB/5918msec); 0 zone resets clat (msec): min=114, max=663, avg=304.01, stdev=219.91 lat (msec): min=114, max=663, avg=304.11, stdev=219.90 clat percentiles (msec): | 1.00th=[ 115], 5.00th=[ 115], 10.00th=[ 115], 20.00th=[ 115], | 30.00th=[ 136], 40.00th=[ 136], 50.00th=[ 292], 60.00th=[ 292], | 70.00th=[ 317], 80.00th=[ 317], 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= 2023, max= 2043, per=42.35%, avg=2035.00, stdev=10.58, samples=3 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=3 lat (usec) : 1000=8.33% lat (msec) : 4=8.33%, 250=25.00%, 500=41.67%, 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=10.51%, ctx=564, 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=144626: Mon Aug 24 02:32:09 2026 read: IOPS=0, BW=343KiB/s (352kB/s)(2048KiB/5966msec) clat (msec): min=134, max=222, avg=178.58, stdev=62.17 lat (msec): min=134, max=222, avg=178.58, stdev=62.17 clat percentiles (msec): | 1.00th=[ 136], 5.00th=[ 136], 10.00th=[ 136], 20.00th=[ 136], | 30.00th=[ 136], 40.00th=[ 136], 50.00th=[ 136], 60.00th=[ 224], | 70.00th=[ 224], 80.00th=[ 224], 90.00th=[ 224], 95.00th=[ 224], | 99.00th=[ 224], 99.50th=[ 224], 99.90th=[ 224], 99.95th=[ 224], | 99.99th=[ 224] bw ( KiB/s): min= 1396, max= 2039, per=50.04%, avg=1717.50, stdev=454.67, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1716KiB/s (1758kB/s)(10.0MiB/5966msec); 0 zone resets clat (msec): min=92, max=3573, avg=560.54, stdev=1066.05 lat (msec): min=93, max=3573, avg=560.63, stdev=1066.05 clat percentiles (msec): | 1.00th=[ 93], 5.00th=[ 93], 10.00th=[ 93], 20.00th=[ 115], | 30.00th=[ 116], 40.00th=[ 121], 50.00th=[ 161], 60.00th=[ 255], | 70.00th=[ 338], 80.00th=[ 405], 90.00th=[ 430], 95.00th=[ 3574], | 99.00th=[ 3574], 99.50th=[ 3574], 99.90th=[ 3574], 99.95th=[ 3574], | 99.99th=[ 3574] bw ( KiB/s): min= 2039, max= 6119, per=67.85%, avg=3260.20, stdev=1818.10, samples=5 iops : min= 1, max= 5, avg= 2.60, stdev= 1.52, samples=5 lat (msec) : 100=8.33%, 250=50.00%, 500=33.33%, >=2000=8.33% cpu : usr=0.00%, sys=11.92%, ctx=223, 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=144627: Mon Aug clat (msec): min=142, max=3659, avg=766.64, stdev=1418.64 24 02:32:09 2026 read: IOPS=1, BW=1238KiB/s (1268kB/s)(6144KiB/4961msec) clat (usec): min=480, max=2420.2k, avg=568030.43, stdev=912927.82 lat (usec): min=482, max=2420.2k, avg=568060.76, stdev=912914.86 clat percentiles (usec): | 1.00th=[ 482], 5.00th=[ 482], 10.00th=[ 482], | 20.00th=[ 221250], 30.00th=[ 221250], 40.00th=[ 231736], | 50.00th=[ 231736], 60.00th=[ 256902], 70.00th=[ 278922], | 80.00th=[ 278922], 90.00th=[2432697], 95.00th=[2432697], | 99.00th=[2432697], 99.50th=[2432697], 99.90th=[2432697], | 99.95th=[2432697], 99.99th=[2432697] bw ( KiB/s): min= 2019, max= 4096, per=74.32%, avg=2550.50, stdev=1030.40, samples=4 iops : min= 1, max= 4, avg= 2.00, stdev= 1.41, samples=4 write: IOPS=1, BW=1238KiB/s (1268kB/s)(6144KiB/4961msec); 0 zone resets clat (msec): min=130, max=369, avg=258.30, stdev=100.65 lat (msec): min=130, max=370, avg=258.39, stdev=100.67 clat percentiles (msec): | 1.00th=[ 131], 5.00th=[ 131], 10.00th=[ 131], 20.00th=[ 165], | 30.00th=[ 165], 40.00th=[ 222], 50.00th=[ 222], 60.00th=[ 309], | 70.00th=[ 355], 80.00th=[ 355], 90.00th=[ 372], 95.00th=[ 372], | 99.00th=[ 372], 99.50th=[ 372], 99.90th=[ 372], 99.95th=[ 372], | 99.99th=[ 372] bw ( KiB/s): min= 2019, max= 4096, per=57.14%, avg=2745.75, stdev=973.60, samples=4 iops : min= 1, max= 4, avg= 2.25, stdev= 1.26, samples=4 lat (usec) : 500=8.33% lat (msec) : 250=41.67%, 500=41.67%, >=2000=8.33% cpu : usr=0.00%, sys=11.25%, ctx=175, 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=144628: Mon Aug 24 02:32:09 2026 read: IOPS=1, BW=1151KiB/s (1178kB/s)(5120KiB/4449msec) clat (usec): min=479, max=262088, avg=125011.93, stdev=120463.93 lat (usec): min=480, max=262089, avg=125012.87, stdev=120463.84 clat percentiles (usec): | 1.00th=[ 482], 5.00th=[ 482], 10.00th=[ 482], 20.00th=[ 482], | 30.00th=[ 1254], 40.00th=[ 1254], 50.00th=[147850], 60.00th=[147850], | 70.00th=[214959], 80.00th=[214959], 90.00th=[261096], 95.00th=[261096], | 99.00th=[261096], 99.50th=[261096], 99.90th=[261096], 99.95th=[261096], | 99.99th=[261096] bw ( KiB/s): min= 4039, max= 4096, per=100.00%, avg=4067.50, stdev=40.31, samples=2 iops : min= 3, max= 4, avg= 3.50, stdev= 0.71, samples=2 write: IOPS=1, BW=1611KiB/s (1650kB/s)(7168KiB/4449msec); 0 zone resets clat (msec): min=134, max=2227, avg=545.32, stdev=748.08 lat (msec): min=134, max=2227, avg=545.80, stdev=747.86 clat percentiles (msec): | 1.00th=[ 134], 5.00th=[ 134], 10.00th=[ 134], 20.00th=[ 205], | 30.00th=[ 209], 40.00th=[ 209], 50.00th=[ 288], 60.00th=[ 326], | 70.00th=[ 326], 80.00th=[ 435], 90.00th=[ 2232], 95.00th=[ 2232], | 99.00th=[ 2232], 99.50th=[ 2232], 99.90th=[ 2232], 99.95th=[ 2232], | 99.99th=[ 2232] bw ( KiB/s): min= 2039, max= 4096, per=67.59%, avg=3247.75, stdev=998.70, samples=4 iops : min= 1, max= 4, avg= 2.50, stdev= 1.29, samples=4 lat (usec) : 500=8.33% lat (msec) : 2=8.33%, 250=41.67%, 500=33.33%, >=2000=8.33% cpu : usr=0.00%, sys=12.99%, ctx=107, 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=3433KiB/s (3515kB/s), 343KiB/s-1238KiB/s (352kB/s-1268kB/s), io=20.0MiB (20.0MB), run=4449-5966msec WRITE: bw=4806KiB/s (4921kB/s), 865KiB/s-1716KiB/s (886kB/s-1758kB/s), io=28.0MiB (29.4MB), run=4449-5966msec lat (msec): min=142, max=3659, avg=766.64, stdev=1418.64 clat percentiles (msec): | 1.00th=[ 142], 5.00th=[ 142], 10.00th=[ 142], 20.00th=[ 144], | 30.00th=[ 144], 40.00th=[ 167], 50.00th=[ 167], 60.00th=[ 186], | 70.00th=[ 300], 80.00th=[ 300], 90.00th=[ 3675], 95.00th=[ 3675], | 99.00th=[ 3675], 99.50th=[ 3675], 99.90th=[ 3675], 99.95th=[ 3675], | 99.99th=[ 3675] bw ( KiB/s): min= 1943, max= 2048, per=65.15%, avg=2003.50, stdev=50.84, samples=4 iops : min= 1, max= 2, avg= 1.25, stdev= 0.50, samples=4 write: IOPS=0, BW=953KiB/s (976kB/s)(6144KiB/6448msec); 0 zone resets clat (msec): min=154, max=658, avg=302.05, stdev=180.86 lat (msec): min=155, max=658, avg=302.75, stdev=180.67 clat percentiles (msec): | 1.00th=[ 155], 5.00th=[ 155], 10.00th=[ 155], 20.00th=[ 220], | 30.00th=[ 220], 40.00th=[ 228], 50.00th=[ 228], 60.00th=[ 255], | 70.00th=[ 300], 80.00th=[ 300], 90.00th=[ 659], 95.00th=[ 659], | 99.00th=[ 659], 99.50th=[ 659], 99.90th=[ 659], 99.95th=[ 659], | 99.99th=[ 659] bw ( KiB/s): min= 1980, max= 3663, per=56.53%, avg=2433.50, stdev=820.25, samples=4 iops : min= 1, max= 3, avg= 1.75, stdev= 0.96, samples=4 lat (msec) : 250=58.33%, 500=25.00%, 750=8.33%, >=2000=8.33% cpu : usr=0.02%, sys=3.54%, ctx=84, 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=144623: Mon Aug 24 02:32:09 2026 read: IOPS=0, BW=826KiB/s (845kB/s)(5120KiB/6202msec) clat (msec): min=126, max=2860, avg=723.26, stdev=1196.06 lat (msec): min=126, max=2860, avg=723.26, stdev=1196.06 clat percentiles (msec): | 1.00th=[ 127], 5.00th=[ 127], 10.00th=[ 127], 20.00th=[ 127], | 30.00th=[ 148], 40.00th=[ 148], 50.00th=[ 218], 60.00th=[ 218], | 70.00th=[ 266], 80.00th=[ 266], 90.00th=[ 2869], 95.00th=[ 2869], | 99.00th=[ 2869], 99.50th=[ 2869], 99.90th=[ 2869], 99.95th=[ 2869], | 99.99th=[ 2869] bw ( KiB/s): min= 4071, max= 4079, per=100.00%, avg=4075.00, stdev= 5.66, samples=2 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1156KiB/s (1183kB/s)(7168KiB/6202msec); 0 zone resets clat (msec): min=116, max=711, avg=356.82, stdev=240.42 lat (msec): min=116, max=711, avg=356.94, stdev=240.43 clat percentiles (msec): | 1.00th=[ 116], 5.00th=[ 116], 10.00th=[ 116], 20.00th=[ 207], | 30.00th=[ 222], 40.00th=[ 222], 50.00th=[ 222], 60.00th=[ 342], | 70.00th=[ 342], 80.00th=[ 676], 90.00th=[ 709], 95.00th=[ 709], | 99.00th=[ 709], 99.50th=[ 709], 99.90th=[ 709], 99.95th=[ 709], | 99.99th=[ 709] bw ( KiB/s): min= 1943, max= 4096, per=81.32%, avg=3501.00, stdev=1043.54, samples=4 iops : min= 1, max= 4, avg= 2.75, stdev= 1.26, samples=4 lat (msec) : 250=58.33%, 500=16.67%, 750=16.67%, >=2000=8.33% cpu : usr=0.00%, sys=3.13%, ctx=67, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=5,7,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=3075KiB/s (3149kB/s), 308KiB/s-1201KiB/s (315kB/s-1230kB/s), io=20.0MiB (20.0MB), run=5967-6660msec WRITE: bw=4305KiB/s (4408kB/s), 858KiB/s-1538KiB/s (879kB/s-1574kB/s), io=28.0MiB (29.4MB), run=5967-6660msec 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=144635: Mon Aug 24 02:32:22 2026 read: IOPS=1, BW=4503KiB/s (4611kB/s)(12.0MiB/2729msec) clat (msec): min=280, max=1063, avg=801.14, stdev=451.25 lat (msec): min=280, max=1063, avg=801.14, stdev=451.25 clat percentiles (msec): | 1.00th=[ 279], 5.00th=[ 279], 10.00th=[ 279], 20.00th=[ 279], | 30.00th=[ 279], 40.00th=[ 1062], 50.00th=[ 1062], 60.00th=[ 1062], | 70.00th=[ 1062], 80.00th=[ 1062], 90.00th=[ 1062], 95.00th=[ 1062], | 99.00th=[ 1062], 99.50th=[ 1062], 99.90th=[ 1062], 99.95th=[ 1062], | 99.99th=[ 1062] bw ( KiB/s): min= 8126, max= 8126, per=100.00%, avg=8126.00, 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=4.95%, ctx=61, majf=0, minf=8 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=144636: Mon Aug 24 02:32:22 2026 read: IOPS=0, BW=1883KiB/s (1928kB/s)(4096KiB/2175msec) clat (nsec): min=608056k, max=608056k, avg=608056146.00, stdev= 0.00 lat (nsec): min=608058k, max=608058k, avg=608058348.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 609], 5.00th=[ 609], 10.00th=[ 609], 20.00th=[ 609], | 30.00th=[ 609], 40.00th=[ 609], 50.00th=[ 609], 60.00th=[ 609], | 70.00th=[ 609], 80.00th=[ 609], 90.00th=[ 609], 95.00th=[ 609], | 99.00th=[ 609], 99.50th=[ 609], 99.90th=[ 609], 99.95th=[ 609], | 99.99th=[ 609] 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=3766KiB/s (3857kB/s)(8192KiB/2175msec); 0 zone resets clat (msec): min=402, max=850, avg=626.24, stdev=317.11 lat (msec): min=404, max=850, avg=627.66, stdev=315.52 clat percentiles (msec): | 1.00th=[ 401], 5.00th=[ 401], 10.00th=[ 401], 20.00th=[ 401], | 30.00th=[ 401], 40.00th=[ 401], 50.00th=[ 401], 60.00th=[ 852], | 70.00th=[ 852], 80.00th=[ 852], 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= 8126, max= 8126, per=82.48%, avg=8126.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 750=33.33%, 1000=33.33% cpu : usr=0.00%, sys=9.66%, ctx=56, 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=144637: Mon Aug 24 02:32:22 2026 write: IOPS=0, BW=3695KiB/s (3783kB/s)(12.0MiB/3326msec); 0 zone resets clat (msec): min=259, max=1456, avg=993.95, stdev=643.39 lat (msec): min=259, max=1456, avg=994.41, stdev=643.47 clat percentiles (msec): | 1.00th=[ 259], 5.00th=[ 259], 10.00th=[ 259], 20.00th=[ 259], | 30.00th=[ 259], 40.00th=[ 1267], 50.00th=[ 1267], 60.00th=[ 1267], | 70.00th=[ 1452], 80.00th=[ 1452], 90.00th=[ 1452], 95.00th=[ 1452], | 99.00th=[ 1452], 99.50th=[ 1452], 99.90th=[ 1452], 99.95th=[ 1452], | 99.99th=[ 1452] bw ( KiB/s): min= 8175, max= 8192, per=83.06%, avg=8183.50, stdev=12.02, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 500=33.33%, 2000=66.67% cpu : usr=0.00%, sys=5.62%, ctx=71, majf=0, minf=8 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144638: Mon Aug 24 02:32:22 2026 write: IOPS=1, BW=5437KiB/s (5568kB/s)(12.0MiB/2260msec); 0 zone resets clat (msec): min=296, max=1352, avg=672.02, stdev=590.46 lat (msec): min=297, max=1353, avg=672.91, stdev=590.01 clat percentiles (msec): | 1.00th=[ 296], 5.00th=[ 296], 10.00th=[ 296], 20.00th=[ 296], | 30.00th=[ 296], 40.00th=[ 368], 50.00th=[ 368], 60.00th=[ 368], | 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= 6311, max= 8143, per=73.36%, avg=7227.00, stdev=1295.42, 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=7.70%, ctx=69, majf=0, minf=9 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=6004KiB/s (6148kB/s), 1883KiB/s-4503KiB/s (1928kB/s-4611kB/s), io=16.0MiB (16.8MB), run=2175-2729msec WRITE: bw=9852KiB/s (10.1MB/s), 3695KiB/s-5437KiB/s (3783kB/s-5568kB/s), io=32.0MiB (33.6MB), run=2175-3326msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144639: Mon Aug 24 02:32:22 2026 read: IOPS=1, BW=5382KiB/s (5512kB/s)(12.0MiB/2283msec) clat (msec): min=588, max=867, avg=754.64, stdev=146.63 lat (msec): min=588, max=867, avg=754.64, stdev=146.63 clat percentiles (msec): | 1.00th=[ 592], 5.00th=[ 592], 10.00th=[ 592], 20.00th=[ 592], | 30.00th=[ 592], 40.00th=[ 810], 50.00th=[ 810], 60.00th=[ 810], | 70.00th=[ 869], 80.00th=[ 869], 90.00th=[ 869], 95.00th=[ 869], | 99.00th=[ 869], 99.50th=[ 869], 99.90th=[ 869], 99.95th=[ 869], | 99.99th=[ 869] bw ( KiB/s): min= 8143, max= 8159, per=100.00%, avg=8151.00, stdev=11.31, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=33.33%, 1000=66.67% cpu : usr=0.04%, sys=21.30%, ctx=382, majf=0, minf=8 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=3,0,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144640: Mon Aug 24 02:32:22 2026 read: IOPS=0, BW=1675KiB/s (1715kB/s)(4096KiB/2445msec) clat (nsec): min=692293k, max=692293k, avg=692293440.00, stdev= 0.00 lat (nsec): min=692296k, max=692296k, avg=692296290.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 693], 5.00th=[ 693], 10.00th=[ 693], 20.00th=[ 693], | 30.00th=[ 693], 40.00th=[ 693], 50.00th=[ 693], 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= 8159, max= 8159, per=100.00%, avg=8159.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=3351KiB/s (3431kB/s)(8192KiB/2445msec); 0 zone resets clat (msec): min=440, max=1174, avg=807.56, stdev=518.69 lat (msec): min=441, max=1174, avg=808.00, stdev=518.81 clat percentiles (msec): | 1.00th=[ 443], 5.00th=[ 443], 10.00th=[ 443], 20.00th=[ 443], | 30.00th=[ 443], 40.00th=[ 443], 50.00th=[ 443], 60.00th=[ 1167], | 70.00th=[ 1167], 80.00th=[ 1167], 90.00th=[ 1167], 95.00th=[ 1167], | 99.00th=[ 1167], 99.50th=[ 1167], 99.90th=[ 1167], 99.95th=[ 1167], | 99.99th=[ 1167] bw ( KiB/s): min= 8143, max= 8143, per=79.75%, avg=8143.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 750=33.33%, 2000=33.33% cpu : usr=0.00%, sys=5.16%, ctx=101, 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=144641: Mon Aug 24 02:32:22 2026 write: IOPS=0, BW=3829KiB/s (3921kB/s)(12.0MiB/3209msec); 0 zone resets clat (msec): min=227, max=1641, avg=1034.77, stdev=728.23 lat (msec): min=227, max=1643, avg=1035.74, stdev=728.93 clat percentiles (msec): | 1.00th=[ 228], 5.00th=[ 228], 10.00th=[ 228], 20.00th=[ 228], | 30.00th=[ 228], 40.00th=[ 1234], 50.00th=[ 1234], 60.00th=[ 1234], | 70.00th=[ 1636], 80.00th=[ 1636], 90.00th=[ 1636], 95.00th=[ 1636], | 99.00th=[ 1636], 99.50th=[ 1636], 99.90th=[ 1636], 99.95th=[ 1636], | 99.99th=[ 1636] bw ( KiB/s): min= 8159, max= 8159, per=79.90%, 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=3.09%, ctx=38, majf=0, minf=8 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144642: Mon Aug 24 02:32:22 2026 write: IOPS=1, BW=5913KiB/s (6055kB/s)(12.0MiB/2078msec); 0 zone resets clat (msec): min=387, max=1231, avg=678.50, stdev=479.15 lat (msec): min=387, max=1231, avg=678.86, stdev=479.08 clat percentiles (msec): | 1.00th=[ 388], 5.00th=[ 388], 10.00th=[ 388], 20.00th=[ 388], | 30.00th=[ 388], 40.00th=[ 418], 50.00th=[ 418], 60.00th=[ 418], | 70.00th=[ 1234], 80.00th=[ 1234], 90.00th=[ 1234], 95.00th=[ 1234], | 99.00th=[ 1234], 99.50th=[ 1234], 99.90th=[ 1234], 99.95th=[ 1234], | 99.99th=[ 1234] bw ( KiB/s): min= 7062, max= 8159, per=74.53%, avg=7610.50, stdev=775.70, 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=5.58%, 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 Run status group 0 (all jobs): READ: bw=6701KiB/s (6862kB/s), 1675KiB/s-5382KiB/s (1715kB/s-5512kB/s), io=16.0MiB (16.8MB), run=2283-2445msec WRITE: bw=9.97MiB/s (10.5MB/s), 3351KiB/s-5913KiB/s (3431kB/s-6055kB/s), io=32.0MiB (33.6MB), run=2078-3209msec