== sanity test 398b: DIO and buffer IO race ============== 02:37:07 (1788590227) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 5.45999 s, 9.2 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=145652: Sat Sep 5 02:39:30 2026 read: IOPS=11, BW=47.3KiB/s (48.5kB/s)(5992KiB/126552msec) clat (usec): min=33, max=882375, avg=41523.87, stdev=39882.38 lat (usec): min=33, max=882376, avg=41525.78, stdev=39882.33 clat percentiles (usec): | 1.00th=[ 51], 5.00th=[ 61], 10.00th=[ 125], 20.00th=[ 18220], | 30.00th=[ 23725], 40.00th=[ 28705], 50.00th=[ 33817], 60.00th=[ 41157], | 70.00th=[ 50594], 80.00th=[ 63701], 90.00th=[ 81265], 95.00th=[ 93848], | 99.00th=[145753], 99.50th=[170918], 99.90th=[497026], 99.95th=[884999], | 99.99th=[884999] bw ( KiB/s): min= 7, max= 119, per=24.84%, avg=46.95, stdev=20.25, samples=249 iops : min= 1, max= 29, avg=11.09, stdev= 5.08, samples=249 write: IOPS=12, BW=49.8KiB/s (50.9kB/s)(6296KiB/126552msec); 0 zone resets clat (usec): min=952, max=263458, avg=40699.31, stdev=40087.05 lat (usec): min=952, max=263459, avg=40701.94, stdev=40086.23 clat percentiles (usec): | 1.00th=[ 1074], 5.00th=[ 1254], 10.00th=[ 1713], 20.00th=[ 4178], | 30.00th=[ 8979], 40.00th=[ 20317], 50.00th=[ 32637], 60.00th=[ 41681], | 70.00th=[ 53216], 80.00th=[ 69731], 90.00th=[ 94897], 95.00th=[121111], | 99.00th=[177210], 99.50th=[187696], 99.90th=[250610], 99.95th=[263193], | 99.99th=[263193] bw ( KiB/s): min= 7, max= 111, per=25.14%, avg=49.77, stdev=19.46, samples=247 iops : min= 1, max= 27, avg=11.79, stdev= 4.92, samples=247 lat (usec) : 50=0.46%, 100=4.23%, 250=0.39%, 500=0.13%, 750=0.13% lat (usec) : 1000=0.16% lat (msec) : 2=6.09%, 4=3.84%, 10=6.71%, 20=9.57%, 50=36.69% lat (msec) : 100=25.72%, 250=5.73%, 500=0.13%, 1000=0.03% cpu : usr=0.08%, sys=4.81%, ctx=6441, 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=145653: Sat Sep 5 02:39:30 2026 read: IOPS=11, BW=47.2KiB/s (48.3kB/s)(5940KiB/125934msec) clat (usec): min=20, max=602811, avg=39814.57, stdev=35283.36 lat (usec): min=21, max=602814, avg=39816.06, stdev=35283.45 clat percentiles (usec): | 1.00th=[ 43], 5.00th=[ 60], 10.00th=[ 85], 20.00th=[ 17957], | 30.00th=[ 23987], 40.00th=[ 29230], 50.00th=[ 33817], 60.00th=[ 40109], | 70.00th=[ 47973], 80.00th=[ 59507], 90.00th=[ 76022], 95.00th=[ 91751], | 99.00th=[139461], 99.50th=[173016], 99.90th=[497026], 99.95th=[599786], | 99.99th=[599786] bw ( KiB/s): min= 7, max= 104, per=24.97%, avg=47.19, stdev=19.24, samples=246 iops : min= 1, max= 26, avg=11.15, stdev= 4.84, samples=246 write: IOPS=12, BW=50.4KiB/s (51.6kB/s)(6348KiB/125934msec); 0 zone resets clat (usec): min=923, max=320003, avg=41800.91, stdev=41893.04 lat (usec): min=925, max=320006, avg=41808.45, stdev=41890.11 clat percentiles (usec): | 1.00th=[ 1074], 5.00th=[ 1205], 10.00th=[ 1549], 20.00th=[ 3884], | 30.00th=[ 9241], 40.00th=[ 19792], 50.00th=[ 31327], 60.00th=[ 43254], | 70.00th=[ 56361], 80.00th=[ 71828], 90.00th=[100140], 95.00th=[122160], | 99.00th=[177210], 99.50th=[196084], 99.90th=[233833], 99.95th=[320865], | 99.99th=[320865] bw ( KiB/s): min= 7, max= 119, per=25.38%, avg=50.26, stdev=19.79, samples=247 iops : min= 1, max= 29, avg=11.92, stdev= 4.99, samples=247 lat (usec) : 50=0.78%, 100=4.46%, 250=0.46%, 500=0.16%, 750=0.10% lat (usec) : 1000=0.26% lat (msec) : 2=6.41%, 4=4.20%, 10=5.79%, 20=9.05%, 50=36.85% lat (msec) : 100=24.54%, 250=6.74%, 500=0.16%, 750=0.03% cpu : usr=0.08%, sys=4.88%, ctx=6356, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1485,1587,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145654: Sat Sep 5 02:39:30 2026 read: IOPS=11, BW=47.6KiB/s (48.8kB/s)(6028KiB/126587msec) clat (usec): min=31, max=389211, avg=39066.33, stdev=29467.04 lat (usec): min=31, max=389213, avg=39068.75, stdev=29466.78 clat percentiles (usec): | 1.00th=[ 51], 5.00th=[ 61], 10.00th=[ 277], 20.00th=[ 17957], | 30.00th=[ 23462], 40.00th=[ 27919], 50.00th=[ 33817], 60.00th=[ 39584], | 70.00th=[ 48497], 80.00th=[ 57934], 90.00th=[ 74974], 95.00th=[ 90702], | 99.00th=[125305], 99.50th=[149947], 99.90th=[229639], 99.95th=[387974], | 99.99th=[387974] bw ( KiB/s): min= 7, max= 117, per=25.02%, avg=47.28, stdev=19.96, samples=248 iops : min= 1, max= 29, avg=11.18, stdev= 5.04, samples=248 write: IOPS=12, BW=49.5KiB/s (50.6kB/s)(6260KiB/126587msec); 0 zone resets clat (usec): min=678, max=761343, avg=43030.82, stdev=47117.10 lat (usec): min=679, max=761347, avg=43034.23, stdev=47117.58 clat percentiles (usec): | 1.00th=[ 1037], 5.00th=[ 1205], 10.00th=[ 1500], 20.00th=[ 4113], | 30.00th=[ 9503], 40.00th=[ 21103], 50.00th=[ 33162], 60.00th=[ 43779], | 70.00th=[ 56361], 80.00th=[ 71828], 90.00th=[ 98042], 95.00th=[125305], | 99.00th=[189793], 99.50th=[219153], 99.90th=[421528], 99.95th=[759170], | 99.99th=[759170] bw ( KiB/s): min= 7, max= 126, per=24.64%, avg=48.79, stdev=20.53, samples=249 iops : min= 1, max= 31, avg=11.55, stdev= 5.15, samples=249 lat (usec) : 50=0.46%, 100=4.04%, 250=0.36%, 500=0.23%, 750=0.10% lat (usec) : 1000=0.29% lat (msec) : 2=6.09%, 4=3.71%, 10=6.15%, 20=9.86%, 50=36.85% lat (msec) : 100=25.26%, 250=6.38%, 500=0.20%, 1000=0.03% cpu : usr=0.07%, sys=4.74%, ctx=6454, 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=145655: Sat Sep 5 02:39:30 2026 read: IOPS=12, BW=48.1KiB/s (49.3kB/s)(6052KiB/125780msec) clat (usec): min=33, max=257926, avg=38904.49, stdev=28981.37 lat (usec): min=33, max=257928, avg=38910.67, stdev=28982.40 clat percentiles (usec): | 1.00th=[ 47], 5.00th=[ 59], 10.00th=[ 91], 20.00th=[ 17695], | 30.00th=[ 22676], 40.00th=[ 28181], 50.00th=[ 33817], 60.00th=[ 40633], | 70.00th=[ 48497], 80.00th=[ 58459], 90.00th=[ 73925], 95.00th=[ 90702], | 99.00th=[128451], 99.50th=[164627], 99.90th=[210764], 99.95th=[256902], | 99.99th=[256902] bw ( KiB/s): min= 7, max= 103, per=25.49%, avg=48.17, stdev=19.84, samples=245 iops : min= 1, max= 25, avg=11.40, stdev= 5.01, samples=245 write: IOPS=12, BW=49.6KiB/s (50.8kB/s)(6236KiB/125780msec); 0 zone resets clat (usec): min=784, max=690214, avg=42662.63, stdev=45590.07 lat (usec): min=786, max=690218, avg=42665.37, stdev=45590.46 clat percentiles (usec): | 1.00th=[ 1057], 5.00th=[ 1237], 10.00th=[ 1532], 20.00th=[ 3949], | 30.00th=[ 8455], 40.00th=[ 21365], 50.00th=[ 32637], 60.00th=[ 43779], | 70.00th=[ 56361], 80.00th=[ 72877], 90.00th=[ 99091], 95.00th=[126354], | 99.00th=[175113], 99.50th=[202376], 99.90th=[375391], 99.95th=[692061], | 99.99th=[692061] bw ( KiB/s): min= 7, max= 110, per=24.86%, avg=49.21, stdev=19.60, samples=247 iops : min= 1, max= 27, avg=11.66, stdev= 4.94, samples=247 lat (usec) : 50=0.75%, 100=4.39%, 250=0.39%, 500=0.07%, 750=0.03% lat (usec) : 1000=0.36% lat (msec) : 2=5.83%, 4=4.39%, 10=6.45%, 20=9.21%, 50=36.23% lat (msec) : 100=25.10%, 250=6.67%, 500=0.10%, 750=0.03% cpu : usr=0.08%, sys=4.82%, ctx=6417, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1513,1559,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=190KiB/s (194kB/s), 47.2KiB/s-48.1KiB/s (48.3kB/s-49.3kB/s), io=23.4MiB (24.6MB), run=125780-126587msec WRITE: bw=199KiB/s (203kB/s), 49.5KiB/s-50.4KiB/s (50.6kB/s-51.6kB/s), io=24.6MiB (25.7MB), run=125780-126587msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145648: Sat Sep 5 02:41:59 2026 read: IOPS=5, BW=21.7KiB/s (22.2kB/s)(5992KiB/275925msec) clat (msec): min=4, max=906, avg=34.13, stdev=41.29 lat (msec): min=4, max=906, avg=34.13, stdev=41.29 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 13], | 30.00th=[ 16], 40.00th=[ 18], 50.00th=[ 22], 60.00th=[ 27], | 70.00th=[ 34], 80.00th=[ 47], 90.00th=[ 75], 95.00th=[ 99], | 99.00th=[ 153], 99.50th=[ 205], 99.90th=[ 426], 99.95th=[ 911], | 99.99th=[ 911] bw ( KiB/s): min= 7, max= 111, per=27.89%, avg=24.26, stdev=17.27, samples=477 iops : min= 1, max= 27, avg= 5.44, stdev= 4.35, samples=477 write: IOPS=5, BW=22.8KiB/s (23.4kB/s)(6296KiB/275925msec); 0 zone resets clat (msec): min=29, max=557, avg=142.62, stdev=68.58 lat (msec): min=29, max=557, avg=142.63, stdev=68.58 clat percentiles (msec): | 1.00th=[ 47], 5.00th=[ 59], 10.00th=[ 70], 20.00th=[ 87], | 30.00th=[ 99], 40.00th=[ 113], 50.00th=[ 130], 60.00th=[ 144], | 70.00th=[ 165], 80.00th=[ 194], 90.00th=[ 239], 95.00th=[ 275], | 99.00th=[ 363], 99.50th=[ 401], 99.90th=[ 468], 99.95th=[ 558], | 99.99th=[ 558] bw ( KiB/s): min= 7, max= 63, per=24.82%, avg=22.59, stdev=10.15, samples=536 iops : min= 1, max= 15, avg= 5.01, stdev= 2.60, samples=536 lat (msec) : 10=3.84%, 20=18.88%, 50=17.81%, 100=21.78%, 250=33.37% lat (msec) : 500=4.26%, 750=0.03%, 1000=0.03% cpu : usr=0.04%, sys=1.05%, ctx=5015, 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=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=145649: Sat Sep 5 02:41:59 2026 read: IOPS=5, BW=21.7KiB/s (22.2kB/s)(5940KiB/273619msec) clat (msec): min=4, max=696, avg=34.57, stdev=38.49 lat (msec): min=4, max=696, avg=34.58, stdev=38.49 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 13], | 30.00th=[ 16], 40.00th=[ 19], 50.00th=[ 23], 60.00th=[ 28], | 70.00th=[ 35], 80.00th=[ 47], 90.00th=[ 75], 95.00th=[ 104], | 99.00th=[ 165], 99.50th=[ 218], 99.90th=[ 439], 99.95th=[ 693], | 99.99th=[ 693] bw ( KiB/s): min= 7, max= 103, per=28.57%, avg=24.86, stdev=17.27, samples=461 iops : min= 1, max= 25, avg= 5.59, stdev= 4.34, samples=461 write: IOPS=5, BW=23.2KiB/s (23.8kB/s)(6348KiB/273619msec); 0 zone resets clat (msec): min=28, max=557, avg=139.85, stdev=64.17 lat (msec): min=28, max=557, avg=139.86, stdev=64.18 clat percentiles (msec): | 1.00th=[ 44], 5.00th=[ 62], 10.00th=[ 72], 20.00th=[ 86], | 30.00th=[ 101], 40.00th=[ 112], 50.00th=[ 128], 60.00th=[ 144], | 70.00th=[ 163], 80.00th=[ 188], 90.00th=[ 226], 95.00th=[ 259], | 99.00th=[ 347], 99.50th=[ 380], 99.90th=[ 460], 99.95th=[ 558], | 99.99th=[ 558] bw ( KiB/s): min= 7, max= 63, per=25.10%, avg=22.84, stdev= 9.98, samples=534 iops : min= 1, max= 15, avg= 5.07, stdev= 2.55, samples=534 lat (msec) : 10=4.75%, 20=16.28%, 50=19.47%, 100=20.70%, 250=35.64% lat (msec) : 500=3.09%, 750=0.07% cpu : usr=0.04%, sys=1.03%, ctx=5176, 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=145650: Sat Sep 5 02:41:59 2026 read: IOPS=5, BW=22.0KiB/s (22.6kB/s)(6028KiB/273456msec) clat (msec): min=4, max=425, avg=35.76, stdev=39.06 lat (msec): min=4, max=425, avg=35.76, stdev=39.06 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 10], 20.00th=[ 13], | 30.00th=[ 16], 40.00th=[ 20], 50.00th=[ 24], 60.00th=[ 28], | 70.00th=[ 36], 80.00th=[ 50], 90.00th=[ 79], 95.00th=[ 104], | 99.00th=[ 182], 99.50th=[ 279], 99.90th=[ 405], 99.95th=[ 426], | 99.99th=[ 426] bw ( KiB/s): min= 7, max= 126, per=28.03%, avg=24.39, stdev=17.03, samples=477 iops : min= 1, max= 31, avg= 5.46, stdev= 4.29, samples=477 write: IOPS=5, BW=22.9KiB/s (23.4kB/s)(6260KiB/273456msec); 0 zone resets clat (msec): min=35, max=763, avg=140.09, stdev=63.82 lat (msec): min=35, max=763, avg=140.09, stdev=63.81 clat percentiles (msec): | 1.00th=[ 47], 5.00th=[ 61], 10.00th=[ 71], 20.00th=[ 88], | 30.00th=[ 102], 40.00th=[ 114], 50.00th=[ 128], 60.00th=[ 142], | 70.00th=[ 163], 80.00th=[ 188], 90.00th=[ 224], 95.00th=[ 255], | 99.00th=[ 334], 99.50th=[ 368], 99.90th=[ 460], 99.95th=[ 768], | 99.99th=[ 768] bw ( KiB/s): min= 7, max= 63, per=24.83%, avg=22.59, stdev= 9.99, samples=533 iops : min= 1, max= 15, avg= 5.02, stdev= 2.56, samples=533 lat (msec) : 10=5.21%, 20=15.59%, 50=19.56%, 100=20.64%, 250=35.81% lat (msec) : 500=3.16%, 1000=0.03% cpu : usr=0.04%, sys=1.09%, ctx=4988, 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=145651: Sat Sep 5 02:41:59 2026 read: IOPS=5, BW=22.3KiB/s (22.8kB/s)(6052KiB/271513msec) clat (msec): min=4, max=436, avg=34.65, stdev=36.98 lat (msec): min=4, max=436, avg=34.65, stdev=36.98 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 13], | 30.00th=[ 16], 40.00th=[ 19], 50.00th=[ 23], 60.00th=[ 28], | 70.00th=[ 35], 80.00th=[ 48], 90.00th=[ 74], 95.00th=[ 100], | 99.00th=[ 188], 99.50th=[ 249], 99.90th=[ 401], 99.95th=[ 439], | 99.99th=[ 439] bw ( KiB/s): min= 7, max= 103, per=28.89%, avg=25.14, stdev=17.76, samples=465 iops : min= 1, max= 25, avg= 5.65, stdev= 4.49, samples=465 write: IOPS=5, BW=22.0KiB/s (23.5kB/s)(6236KiB/271513msec); 0 zone resets clat (msec): min=31, max=751, avg=140.31, stdev=65.96 lat (msec): min=31, max=751, avg=140.31, stdev=65.96 clat percentiles (msec): | 1.00th=[ 44], 5.00th=[ 60], 10.00th=[ 70], 20.00th=[ 86], | 30.00th=[ 100], 40.00th=[ 113], 50.00th=[ 127], 60.00th=[ 146], | 70.00th=[ 163], 80.00th=[ 190], 90.00th=[ 226], 95.00th=[ 266], | 99.00th=[ 334], 99.50th=[ 359], 99.90th=[ 426], 99.95th=[ 751], | 99.99th=[ 751] bw ( KiB/s): min= 7, max= 71, per=24.71%, avg=22.49, stdev=10.54, samples=533 iops : min= 1, max= 17, avg= 4.98, stdev= 2.70, samples=533 lat (msec) : 10=4.88%, 20=16.96%, 50=19.17%, 100=21.42%, 250=34.05% lat (msec) : 500=3.48%, 1000=0.03% cpu : usr=0.04%, sys=1.01%, ctx=5106, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1513,1559,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=87.0KiB/s (89.1kB/s), 21.7KiB/s-22.3KiB/s (22.2kB/s-22.8kB/s), io=23.4MiB (24.6MB), run=271513-275925msec WRITE: bw=91.1KiB/s (93.3kB/s), 22.8KiB/s-23.2KiB/s (23.4kB/s-23.8kB/s), io=24.6MiB (25.7MB), run=271513-275925msec 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=145705: Sat Sep 5 02:42:37 2026 read: IOPS=14, BW=234KiB/s (240kB/s)(5920KiB/25301msec) clat (usec): min=40, max=294185, avg=34188.07, stdev=34497.84 lat (usec): min=41, max=294187, avg=34190.80, stdev=34497.96 clat percentiles (usec): | 1.00th=[ 43], 5.00th=[ 55], 10.00th=[ 61], 20.00th=[ 69], | 30.00th=[ 445], 40.00th=[ 24249], 50.00th=[ 31065], 60.00th=[ 38011], | 70.00th=[ 47449], 80.00th=[ 56886], 90.00th=[ 72877], 95.00th=[ 90702], | 99.00th=[143655], 99.50th=[210764], 99.90th=[295699], 99.95th=[295699], | 99.99th=[295699] bw ( KiB/s): min= 63, max= 446, per=25.40%, avg=233.94, stdev=85.61, samples=49 iops : min= 3, max= 27, avg=13.88, stdev= 5.34, samples=49 write: IOPS=15, BW=252KiB/s (258kB/s)(6368KiB/25301msec); 0 zone resets clat (usec): min=1224, max=194758, avg=31290.94, stdev=34532.94 lat (usec): min=1224, max=194761, avg=31297.90, stdev=34531.80 clat percentiles (usec): | 1.00th=[ 1385], 5.00th=[ 1663], 10.00th=[ 1827], 20.00th=[ 3752], | 30.00th=[ 6259], 40.00th=[ 9241], 50.00th=[ 17957], 60.00th=[ 26346], | 70.00th=[ 39060], 80.00th=[ 56361], 90.00th=[ 86508], 95.00th=[110625], | 99.00th=[127402], 99.50th=[145753], 99.90th=[193987], 99.95th=[193987], | 99.99th=[193987] bw ( KiB/s): min= 31, max= 510, per=26.09%, avg=252.86, stdev=101.93, samples=49 iops : min= 1, max= 31, avg=15.08, stdev= 6.41, samples=49 lat (usec) : 50=1.82%, 100=11.33%, 250=0.91%, 500=0.39%, 750=0.26% lat (msec) : 2=6.12%, 4=4.56%, 10=11.59%, 20=7.03%, 50=30.86% lat (msec) : 100=19.66%, 250=5.34%, 500=0.13% cpu : usr=0.08%, sys=5.70%, ctx=1358, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145706: Sat Sep 5 02:42:37 2026 read: IOPS=13, BW=222KiB/s (228kB/s)(5744KiB/25834msec) clat (usec): min=36, max=263140, avg=36345.74, stdev=34680.51 lat (usec): min=36, max=263141, avg=36346.98, stdev=34680.51 clat percentiles (usec): | 1.00th=[ 41], 5.00th=[ 55], 10.00th=[ 61], 20.00th=[ 72], | 30.00th=[ 1205], 40.00th=[ 25560], 50.00th=[ 33424], 60.00th=[ 40633], | 70.00th=[ 51119], 80.00th=[ 60556], 90.00th=[ 79168], 95.00th=[100140], | 99.00th=[143655], 99.50th=[162530], 99.90th=[263193], 99.95th=[263193], | 99.99th=[263193] bw ( KiB/s): min= 61, max= 382, per=24.08%, avg=221.78, stdev=83.84, samples=50 iops : min= 3, max= 23, avg=13.12, stdev= 5.21, samples=50 write: IOPS=15, BW=253KiB/s (259kB/s)(6544KiB/25834msec); 0 zone resets clat (usec): min=1368, max=172982, avg=31016.46, stdev=34157.15 lat (usec): min=1370, max=172984, avg=31019.55, stdev=34156.82 clat percentiles (usec): | 1.00th=[ 1500], 5.00th=[ 1795], 10.00th=[ 2409], 20.00th=[ 4228], | 30.00th=[ 6390], 40.00th=[ 10028], 50.00th=[ 16909], 60.00th=[ 27395], | 70.00th=[ 41157], 80.00th=[ 55837], 90.00th=[ 79168], 95.00th=[ 96994], | 99.00th=[149947], 99.50th=[164627], 99.90th=[173016], 99.95th=[173016], | 99.99th=[173016] bw ( KiB/s): min= 94, max= 541, per=25.91%, avg=251.06, stdev=98.78, samples=50 iops : min= 5, max= 33, avg=14.94, stdev= 6.20, samples=50 lat (usec) : 50=1.95%, 100=10.81%, 250=0.91%, 500=0.13%, 750=0.13% lat (msec) : 2=4.43%, 4=5.86%, 10=11.20%, 20=8.72%, 50=28.91% lat (msec) : 100=22.14%, 250=4.69%, 500=0.13% cpu : usr=0.09%, sys=5.80%, ctx=1375, 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=145707: Sat Sep 5 02:42:37 2026 read: IOPS=15, BW=241KiB/s (247kB/s)(6256KiB/25988msec) clat (usec): min=35, max=271682, avg=33738.64, stdev=33661.15 lat (usec): min=35, max=271683, avg=33740.02, stdev=33661.21 clat percentiles (usec): | 1.00th=[ 39], 5.00th=[ 46], 10.00th=[ 60], 20.00th=[ 72], | 30.00th=[ 725], 40.00th=[ 21103], 50.00th=[ 30016], 60.00th=[ 36963], | 70.00th=[ 46400], 80.00th=[ 60031], 90.00th=[ 73925], 95.00th=[ 92799], | 99.00th=[139461], 99.50th=[173016], 99.90th=[270533], 99.95th=[270533], | 99.99th=[270533] bw ( KiB/s): min= 64, max= 474, per=26.05%, avg=239.92, stdev=84.64, samples=50 iops : min= 4, max= 29, avg=14.26, stdev= 5.30, samples=50 write: IOPS=14, BW=232KiB/s (238kB/s)(6032KiB/25988msec); 0 zone resets clat (usec): min=1476, max=172252, avg=33340.75, stdev=32650.34 lat (usec): min=1479, max=172254, avg=33361.27, stdev=32655.10 clat percentiles (usec): | 1.00th=[ 1549], 5.00th=[ 1827], 10.00th=[ 2638], 20.00th=[ 4817], | 30.00th=[ 8029], 40.00th=[ 14353], 50.00th=[ 22938], 60.00th=[ 33424], | 70.00th=[ 42730], 80.00th=[ 59507], 90.00th=[ 86508], 95.00th=[ 99091], | 99.00th=[126354], 99.50th=[160433], 99.90th=[173016], 99.95th=[173016], | 99.99th=[173016] bw ( KiB/s): min= 92, max= 413, per=23.55%, avg=228.18, stdev=88.71, samples=50 iops : min= 5, max= 25, avg=13.50, stdev= 5.52, samples=50 lat (usec) : 50=2.86%, 100=11.20%, 250=1.17%, 750=0.13% lat (msec) : 2=3.78%, 4=4.82%, 10=8.85%, 20=9.90%, 50=31.51% lat (msec) : 100=21.35%, 250=4.30%, 500=0.13% cpu : usr=0.06%, sys=5.49%, ctx=1394, 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=145708: Sat Sep 5 02:42:37 2026 read: IOPS=15, BW=242KiB/s (248kB/s)(6032KiB/24939msec) clat (usec): min=35, max=173183, avg=34456.46, stdev=31694.52 lat (usec): min=35, max=173184, avg=34457.91, stdev=31694.91 clat percentiles (usec): | 1.00th=[ 41], 5.00th=[ 55], 10.00th=[ 62], 20.00th=[ 75], | 30.00th=[ 930], 40.00th=[ 24773], 50.00th=[ 31851], 60.00th=[ 39584], | 70.00th=[ 48497], 80.00th=[ 59507], 90.00th=[ 77071], 95.00th=[ 88605], | 99.00th=[141558], 99.50th=[156238], 99.90th=[173016], 99.95th=[173016], | 99.99th=[173016] bw ( KiB/s): min= 87, max= 413, per=26.34%, avg=242.58, stdev=78.92, samples=48 iops : min= 5, max= 25, avg=14.44, stdev= 4.98, samples=48 write: IOPS=15, BW=251KiB/s (257kB/s)(6256KiB/24939msec); 0 zone resets clat (usec): min=1329, max=216863, avg=30047.89, stdev=31609.05 lat (usec): min=1331, max=216865, avg=30050.31, stdev=31609.05 clat percentiles (usec): | 1.00th=[ 1434], 5.00th=[ 1647], 10.00th=[ 2024], 20.00th=[ 3654], | 30.00th=[ 6718], 40.00th=[ 10028], 50.00th=[ 17695], 60.00th=[ 27919], | 70.00th=[ 39584], 80.00th=[ 55837], 90.00th=[ 76022], 95.00th=[ 90702], | 99.00th=[117965], 99.50th=[152044], 99.90th=[217056], 99.95th=[217056], | 99.99th=[217056] bw ( KiB/s): min= 95, max= 442, per=26.07%, avg=252.60, stdev=89.65, samples=48 iops : min= 5, max= 27, avg=15.06, stdev= 5.58, samples=48 lat (usec) : 50=1.69%, 100=11.07%, 250=0.78%, 500=0.65%, 750=0.39% lat (usec) : 1000=0.26% lat (msec) : 2=5.47%, 4=5.99%, 10=9.64%, 20=7.42%, 50=30.73% lat (msec) : 100=22.53%, 250=3.39% cpu : usr=0.08%, sys=5.73%, ctx=1352, 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=922KiB/s (944kB/s), 222KiB/s-242KiB/s (228kB/s-248kB/s), io=23.4MiB (24.5MB), run=24939-25988msec WRITE: bw=970KiB/s (993kB/s), 232KiB/s-253KiB/s (238kB/s-259kB/s), io=24.6MiB (25.8MB), run=24939-25988msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145710: Sat Sep 5 02:43:20 2026 read: IOPS=5, BW=86.4KiB/s (88.4kB/s)(5920KiB/68556msec) clat (msec): min=6, max=244, avg=40.33, stdev=34.23 lat (msec): min=6, max=244, avg=40.33, stdev=34.23 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 18], | 30.00th=[ 22], 40.00th=[ 26], 50.00th=[ 31], 60.00th=[ 36], | 70.00th=[ 43], 80.00th=[ 54], 90.00th=[ 82], 95.00th=[ 112], | 99.00th=[ 190], 99.50th=[ 234], 99.90th=[ 245], 99.95th=[ 245], | 99.99th=[ 245] bw ( KiB/s): min= 30, max= 410, per=27.59%, avg=95.73, stdev=63.43, samples=121 iops : min= 1, max= 25, avg= 5.22, stdev= 4.02, samples=121 write: IOPS=5, BW=92.9KiB/s (95.1kB/s)(6368KiB/68556msec); 0 zone resets clat (msec): min=41, max=358, avg=134.63, stdev=57.28 lat (msec): min=41, max=358, avg=134.63, stdev=57.28 clat percentiles (msec): | 1.00th=[ 53], 5.00th=[ 65], 10.00th=[ 74], 20.00th=[ 88], | 30.00th=[ 99], 40.00th=[ 110], 50.00th=[ 123], 60.00th=[ 136], | 70.00th=[ 150], 80.00th=[ 178], 90.00th=[ 218], 95.00th=[ 253], | 99.00th=[ 313], 99.50th=[ 330], 99.90th=[ 359], 99.95th=[ 359], | 99.99th=[ 359] bw ( KiB/s): min= 21, max= 191, per=25.68%, avg=93.98, stdev=38.37, samples=133 iops : min= 1, max= 11, avg= 5.12, stdev= 2.43, samples=133 lat (msec) : 10=1.69%, 20=10.68%, 50=25.26%, 100=23.57%, 250=36.20% lat (msec) : 500=2.60% cpu : usr=0.05%, sys=1.27%, ctx=1397, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145711: Sat Sep 5 02:43:20 2026 read: IOPS=5, BW=83.4KiB/s (85.4kB/s)(5744KiB/68852msec) clat (msec): min=6, max=225, avg=40.08, stdev=33.69 lat (msec): min=6, max=225, avg=40.08, stdev=33.69 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 14], 20.00th=[ 17], | 30.00th=[ 21], 40.00th=[ 24], 50.00th=[ 29], 60.00th=[ 36], | 70.00th=[ 44], 80.00th=[ 55], 90.00th=[ 83], 95.00th=[ 120], | 99.00th=[ 163], 99.50th=[ 220], 99.90th=[ 226], 99.95th=[ 226], | 99.99th=[ 226] bw ( KiB/s): min= 21, max= 411, per=27.11%, avg=94.06, stdev=67.41, samples=119 iops : min= 1, max= 25, avg= 5.13, stdev= 4.26, samples=119 write: IOPS=5, BW=95.0KiB/s (97.3kB/s)(6544KiB/68852msec); 0 zone resets clat (msec): min=36, max=408, avg=132.97, stdev=57.01 lat (msec): min=36, max=408, avg=132.97, stdev=57.01 clat percentiles (msec): | 1.00th=[ 52], 5.00th=[ 66], 10.00th=[ 74], 20.00th=[ 89], | 30.00th=[ 101], 40.00th=[ 109], 50.00th=[ 120], 60.00th=[ 134], | 70.00th=[ 148], 80.00th=[ 167], 90.00th=[ 203], 95.00th=[ 247], | 99.00th=[ 330], 99.50th=[ 359], 99.90th=[ 409], 99.95th=[ 409], | 99.99th=[ 409] bw ( KiB/s): min= 31, max= 160, per=26.23%, avg=96.01, stdev=35.85, samples=133 iops : min= 1, max= 10, avg= 5.24, stdev= 2.28, samples=133 lat (msec) : 10=1.04%, 20=12.24%, 50=23.44%, 100=22.66%, 250=38.28% lat (msec) : 500=2.34% cpu : usr=0.04%, sys=1.33%, ctx=1397, 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=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=145712: Sat Sep 5 02:43:20 2026 read: IOPS=6, BW=96.8KiB/s (99.1kB/s)(6256KiB/64645msec) clat (msec): min=6, max=204, avg=40.90, stdev=32.41 lat (msec): min=6, max=204, avg=40.90, stdev=32.41 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 15], 20.00th=[ 18], | 30.00th=[ 23], 40.00th=[ 27], 50.00th=[ 33], 60.00th=[ 39], | 70.00th=[ 44], 80.00th=[ 54], 90.00th=[ 73], 95.00th=[ 125], | 99.00th=[ 163], 99.50th=[ 184], 99.90th=[ 205], 99.95th=[ 205], | 99.99th=[ 205] bw ( KiB/s): min= 31, max= 415, per=30.71%, avg=106.58, stdev=64.73, samples=116 iops : min= 1, max= 25, avg= 5.91, stdev= 4.12, samples=116 write: IOPS=5, BW=93.3KiB/s (95.5kB/s)(6032KiB/64645msec); 0 zone resets clat (msec): min=36, max=406, avg=128.85, stdev=59.14 lat (msec): min=36, max=406, avg=128.86, stdev=59.14 clat percentiles (msec): | 1.00th=[ 46], 5.00th=[ 59], 10.00th=[ 70], 20.00th=[ 83], | 30.00th=[ 94], 40.00th=[ 103], 50.00th=[ 115], 60.00th=[ 130], | 70.00th=[ 146], 80.00th=[ 165], 90.00th=[ 207], 95.00th=[ 251], | 99.00th=[ 326], 99.50th=[ 376], 99.90th=[ 405], 99.95th=[ 405], | 99.99th=[ 405] bw ( KiB/s): min= 31, max= 191, per=25.55%, avg=93.51, stdev=39.49, samples=126 iops : min= 1, max= 11, avg= 5.09, stdev= 2.50, samples=126 lat (msec) : 10=0.78%, 20=11.72%, 50=27.86%, 100=25.52%, 250=31.64% lat (msec) : 500=2.47% cpu : usr=0.05%, sys=1.50%, ctx=1494, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145713: Sat Sep 5 02:43:20 2026 read: IOPS=5, BW=90.3KiB/s (92.4kB/s)(6032KiB/66824msec) clat (msec): min=8, max=312, avg=40.52, stdev=35.23 lat (msec): min=8, max=312, avg=40.52, stdev=35.23 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 12], 10.00th=[ 16], 20.00th=[ 18], | 30.00th=[ 22], 40.00th=[ 26], 50.00th=[ 31], 60.00th=[ 36], | 70.00th=[ 41], 80.00th=[ 53], 90.00th=[ 81], 95.00th=[ 114], | 99.00th=[ 188], 99.50th=[ 228], 99.90th=[ 313], 99.95th=[ 313], | 99.99th=[ 313] bw ( KiB/s): min= 31, max= 320, per=28.46%, avg=98.74, stdev=58.44, samples=119 iops : min= 1, max= 20, avg= 5.42, stdev= 3.67, samples=119 write: IOPS=5, BW=93.6KiB/s (95.9kB/s)(6256KiB/66824msec); 0 zone resets clat (msec): min=43, max=549, avg=131.66, stdev=60.41 lat (msec): min=43, max=549, avg=131.66, stdev=60.41 clat percentiles (msec): | 1.00th=[ 52], 5.00th=[ 63], 10.00th=[ 70], 20.00th=[ 85], | 30.00th=[ 95], 40.00th=[ 108], 50.00th=[ 121], 60.00th=[ 133], | 70.00th=[ 144], 80.00th=[ 171], 90.00th=[ 205], 95.00th=[ 253], | 99.00th=[ 355], 99.50th=[ 359], 99.90th=[ 550], 99.95th=[ 550], | 99.99th=[ 550] bw ( KiB/s): min= 31, max= 192, per=26.20%, avg=95.88, stdev=38.71, samples=128 iops : min= 1, max= 12, avg= 5.23, stdev= 2.48, samples=128 lat (msec) : 10=0.78%, 20=11.33%, 50=25.78%, 100=25.91%, 250=33.20% lat (msec) : 500=2.86%, 750=0.13% cpu : usr=0.03%, sys=1.37%, ctx=1388, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=348KiB/s (356kB/s), 83.4KiB/s-96.8KiB/s (85.4kB/s-99.1kB/s), io=23.4MiB (24.5MB), run=64645-68852msec WRITE: bw=366KiB/s (375kB/s), 92.9KiB/s-95.0KiB/s (95.1kB/s-97.3kB/s), io=24.6MiB (25.8MB), run=64645-68852msec 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=145729: Sat Sep 5 02:43:36 2026 read: IOPS=1, BW=1548KiB/s (1585kB/s)(7168KiB/4631msec) clat (usec): min=1577, max=2725.1k, avg=526824.62, stdev=981594.78 lat (usec): min=1578, max=2725.1k, avg=526826.07, stdev=981595.42 clat percentiles (usec): | 1.00th=[ 1582], 5.00th=[ 1582], 10.00th=[ 1582], | 20.00th=[ 3064], 30.00th=[ 126354], 40.00th=[ 126354], | 50.00th=[ 181404], 60.00th=[ 187696], 70.00th=[ 187696], | 80.00th=[ 463471], 90.00th=[2734687], 95.00th=[2734687], | 99.00th=[2734687], 99.50th=[2734687], 99.90th=[2734687], | 99.95th=[2734687], 99.99th=[2734687] bw ( KiB/s): min= 3992, max= 6107, per=100.00%, avg=5049.50, stdev=1495.53, samples=2 iops : min= 3, max= 5, avg= 4.00, stdev= 1.41, samples=2 write: IOPS=1, BW=1106KiB/s (1132kB/s)(5120KiB/4631msec); 0 zone resets clat (msec): min=59, max=308, avg=158.81, stdev=93.95 lat (msec): min=59, max=308, avg=159.06, stdev=93.93 clat percentiles (msec): | 1.00th=[ 60], 5.00th=[ 60], 10.00th=[ 60], 20.00th=[ 60], | 30.00th=[ 113], 40.00th=[ 113], 50.00th=[ 138], 60.00th=[ 138], | 70.00th=[ 178], 80.00th=[ 178], 90.00th=[ 309], 95.00th=[ 309], | 99.00th=[ 309], 99.50th=[ 309], 99.90th=[ 309], 99.95th=[ 309], | 99.99th=[ 309] bw ( KiB/s): min= 2035, max= 6119, per=85.85%, avg=4077.00, stdev=2887.82, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 lat (msec) : 2=8.33%, 4=8.33%, 100=8.33%, 250=50.00%, 500=16.67% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=10.28%, ctx=657, 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=145730: Sat Sep 5 02:43:36 2026 read: IOPS=0, BW=339KiB/s (347kB/s)(2048KiB/6037msec) clat (msec): min=22, max=251, avg=136.78, stdev=161.75 lat (msec): min=22, max=251, avg=136.79, stdev=161.75 clat percentiles (msec): | 1.00th=[ 23], 5.00th=[ 23], 10.00th=[ 23], 20.00th=[ 23], | 30.00th=[ 23], 40.00th=[ 23], 50.00th=[ 23], 60.00th=[ 251], | 70.00th=[ 251], 80.00th=[ 251], 90.00th=[ 251], 95.00th=[ 251], | 99.00th=[ 251], 99.50th=[ 251], 99.90th=[ 251], 99.95th=[ 251], | 99.99th=[ 251] bw ( KiB/s): min= 1592, max= 1976, per=52.59%, avg=1784.00, stdev=271.53, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1696KiB/s (1737kB/s)(10.0MiB/6037msec); 0 zone resets clat (msec): min=154, max=2785, avg=550.66, stdev=802.08 lat (msec): min=154, max=2786, avg=550.92, stdev=802.02 clat percentiles (msec): | 1.00th=[ 155], 5.00th=[ 155], 10.00th=[ 155], 20.00th=[ 157], | 30.00th=[ 215], 40.00th=[ 239], 50.00th=[ 249], 60.00th=[ 271], | 70.00th=[ 342], 80.00th=[ 380], 90.00th=[ 718], 95.00th=[ 2802], | 99.00th=[ 2802], 99.50th=[ 2802], 99.90th=[ 2802], 99.95th=[ 2802], | 99.99th=[ 2802] bw ( KiB/s): min= 3953, max= 4071, per=84.81%, avg=4027.50, stdev=52.32, samples=4 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=4 lat (msec) : 50=8.33%, 250=41.67%, 500=33.33%, 750=8.33%, >=2000=8.33% cpu : usr=0.02%, sys=7.90%, ctx=104, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=2,10,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145731: Sat Sep 5 02:43:36 2026 read: IOPS=1, BW=1121KiB/s (1148kB/s)(6144KiB/5482msec) clat (usec): min=960, max=482386, avg=185658.73, stdev=182242.60 lat (usec): min=962, max=482387, avg=185660.27, stdev=182242.45 clat percentiles (usec): | 1.00th=[ 963], 5.00th=[ 963], 10.00th=[ 963], 20.00th=[ 1647], | 30.00th=[ 1647], 40.00th=[141558], 50.00th=[141558], 60.00th=[217056], | 70.00th=[270533], 80.00th=[270533], 90.00th=[484443], 95.00th=[484443], | 99.00th=[484443], 99.50th=[484443], 99.90th=[484443], 99.95th=[484443], | 99.99th=[484443] bw ( KiB/s): min= 1976, max= 4071, per=99.27%, avg=3367.33, stdev=1204.96, samples=3 iops : min= 1, max= 3, avg= 2.33, stdev= 1.15, samples=3 write: IOPS=1, BW=1121KiB/s (1148kB/s)(6144KiB/5482msec); 0 zone resets clat (msec): min=153, max=2892, avg=720.37, stdev=1080.90 lat (msec): min=153, max=2893, avg=720.46, stdev=1080.90 clat percentiles (msec): | 1.00th=[ 155], 5.00th=[ 155], 10.00th=[ 155], 20.00th=[ 163], | 30.00th=[ 163], 40.00th=[ 218], 50.00th=[ 218], 60.00th=[ 239], | 70.00th=[ 659], 80.00th=[ 659], 90.00th=[ 2903], 95.00th=[ 2903], | 99.00th=[ 2903], 99.50th=[ 2903], 99.90th=[ 2903], 99.95th=[ 2903], | 99.99th=[ 2903] bw ( KiB/s): min= 2027, max= 3953, per=58.83%, avg=2793.75, stdev=938.37, samples=4 iops : min= 1, max= 3, avg= 2.00, stdev= 1.15, samples=4 lat (usec) : 1000=8.33% lat (msec) : 2=8.33%, 250=50.00%, 500=16.67%, 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=8.06%, ctx=183, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=6,6,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145732: Sat Sep 5 02:43:36 2026 read: IOPS=0, BW=893KiB/s (914kB/s)(5120KiB/5735msec) clat (usec): min=673, max=226746, avg=56323.74, stdev=97722.39 lat (usec): min=675, max=226748, avg=56325.04, stdev=97722.34 clat percentiles (usec): | 1.00th=[ 676], 5.00th=[ 676], 10.00th=[ 676], 20.00th=[ 676], | 30.00th=[ 1172], 40.00th=[ 1172], 50.00th=[ 1631], 60.00th=[ 1631], | 70.00th=[ 51643], 80.00th=[ 51643], 90.00th=[227541], 95.00th=[227541], | 99.00th=[227541], 99.50th=[227541], 99.90th=[227541], 99.95th=[227541], | 99.99th=[227541] bw ( KiB/s): min= 8110, max= 8110, per=100.00%, avg=8110.00, stdev= 0.00, samples=1 iops : min= 7, max= 7, avg= 7.00, stdev= 0.00, samples=1 write: IOPS=1, BW=1250KiB/s (1280kB/s)(7168KiB/5735msec); 0 zone resets clat (msec): min=135, max=3269, avg=740.50, stdev=1123.27 lat (msec): min=137, max=3269, avg=740.97, stdev=1123.03 clat percentiles (msec): | 1.00th=[ 136], 5.00th=[ 136], 10.00th=[ 136], 20.00th=[ 161], | 30.00th=[ 284], 40.00th=[ 284], 50.00th=[ 435], 60.00th=[ 443], | 70.00th=[ 443], 80.00th=[ 460], 90.00th=[ 3272], 95.00th=[ 3272], | 99.00th=[ 3272], 99.50th=[ 3272], 99.90th=[ 3272], 99.95th=[ 3272], | 99.99th=[ 3272] bw ( KiB/s): min= 1582, max= 4079, per=49.19%, avg=2335.80, stdev=991.80, samples=5 iops : min= 1, max= 3, avg= 1.40, stdev= 0.89, samples=5 lat (usec) : 750=8.33% lat (msec) : 2=16.67%, 100=8.33%, 250=25.00%, 500=33.33%, >=2000=8.33% cpu : usr=0.00%, sys=6.12%, ctx=123, 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=3392KiB/s (3474kB/s), 339KiB/s-1548KiB/s (347kB/s-1585kB/s), io=20.0MiB (20.0MB), run=4631-6037msec WRITE: bw=4749KiB/s (4863kB/s), 1106KiB/s-1696KiB/s (1132kB/s-1737kB/s), io=28.0MiB (29.4MB), run=4631-6037msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145734: Sat Sep 5 02:43:37 2026 read: IOPS=1, BW=1054KiB/s (1079kB/s)(7168KiB/6801msec) clat (msec): min=42, max=2789, avg=840.59, stdev=1048.23 lat (msec): min=42, max=2789, avg=840.59, stdev=1048.23 clat percentiles (msec): | 1.00th=[ 43], 5.00th=[ 43], 10.00th=[ 43], 20.00th=[ 63], | 30.00th=[ 104], 40.00th=[ 104], 50.00th=[ 405], 60.00th=[ 743], | 70.00th=[ 743], 80.00th=[ 1737], 90.00th=[ 2802], 95.00th=[ 2802], | 99.00th=[ 2802], 99.50th=[ 2802], 99.90th=[ 2802], 99.95th=[ 2802], | 99.99th=[ 2802] bw ( KiB/s): min= 1973, max= 2039, per=68.07%, avg=2016.20, stdev=26.52, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 write: IOPS=0, BW=753KiB/s (771kB/s)(5120KiB/6801msec); 0 zone resets clat (msec): min=132, max=251, avg=169.96, stdev=48.03 lat (msec): min=132, max=251, avg=170.08, stdev=48.02 clat percentiles (msec): | 1.00th=[ 133], 5.00th=[ 133], 10.00th=[ 133], 20.00th=[ 133], | 30.00th=[ 144], 40.00th=[ 144], 50.00th=[ 148], 60.00th=[ 148], | 70.00th=[ 176], 80.00th=[ 176], 90.00th=[ 251], 95.00th=[ 251], | 99.00th=[ 251], 99.50th=[ 251], 99.90th=[ 251], 99.95th=[ 251], | 99.99th=[ 251] bw ( KiB/s): min= 2011, max= 6071, per=97.47%, avg=4041.00, stdev=2870.85, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 lat (msec) : 50=8.33%, 100=8.33%, 250=41.67%, 500=16.67%, 750=8.33% lat (msec) : 2000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=1.82%, ctx=52, 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=145735: Sat Sep 5 02:43:37 2026 read: IOPS=0, BW=296KiB/s (303kB/s)(2048KiB/6914msec) clat (msec): min=32, max=264, avg=148.53, stdev=164.46 lat (msec): min=32, max=264, avg=148.54, stdev=164.46 clat percentiles (msec): | 1.00th=[ 33], 5.00th=[ 33], 10.00th=[ 33], 20.00th=[ 33], | 30.00th=[ 33], 40.00th=[ 33], 50.00th=[ 33], 60.00th=[ 266], | 70.00th=[ 266], 80.00th=[ 266], 90.00th=[ 266], 95.00th=[ 266], | 99.00th=[ 266], 99.50th=[ 266], 99.90th=[ 266], 99.95th=[ 266], | 99.99th=[ 266] bw ( KiB/s): min= 1393, max= 2027, per=57.73%, avg=1710.00, stdev=448.31, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1481KiB/s (1517kB/s)(10.0MiB/6914msec); 0 zone resets clat (msec): min=64, max=3598, avg=628.03, stdev=1074.65 lat (msec): min=64, max=3607, avg=629.09, stdev=1077.03 clat percentiles (msec): | 1.00th=[ 65], 5.00th=[ 65], 10.00th=[ 65], 20.00th=[ 118], | 30.00th=[ 123], 40.00th=[ 218], 50.00th=[ 243], 60.00th=[ 255], | 70.00th=[ 326], 80.00th=[ 363], 90.00th=[ 969], 95.00th=[ 3608], | 99.00th=[ 3608], 99.50th=[ 3608], 99.90th=[ 3608], 99.95th=[ 3608], | 99.99th=[ 3608] bw ( KiB/s): min= 1984, max= 4087, per=77.96%, avg=3232.20, stdev=1116.75, samples=5 iops : min= 1, max= 3, avg= 2.20, stdev= 1.10, samples=5 lat (msec) : 50=8.33%, 100=8.33%, 250=33.33%, 500=33.33%, 1000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=2.65%, ctx=87, 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=145736: Sat Sep 5 02:43:37 2026 read: IOPS=0, BW=915KiB/s (937kB/s)(6144KiB/6713msec) clat (msec): min=68, max=444, avg=222.71, stdev=155.01 lat (msec): min=68, max=444, avg=222.71, stdev=155.01 clat percentiles (msec): | 1.00th=[ 68], 5.00th=[ 68], 10.00th=[ 68], 20.00th=[ 80], | 30.00th=[ 80], 40.00th=[ 132], 50.00th=[ 132], 60.00th=[ 262], | 70.00th=[ 351], 80.00th=[ 351], 90.00th=[ 443], 95.00th=[ 443], | 99.00th=[ 443], 99.50th=[ 443], 99.90th=[ 443], 99.95th=[ 443], | 99.99th=[ 443] bw ( KiB/s): min= 3968, max= 6083, per=100.00%, avg=5025.50, stdev=1495.53, samples=2 iops : min= 3, max= 5, avg= 4.00, stdev= 1.41, samples=2 write: IOPS=0, BW=915KiB/s (937kB/s)(6144KiB/6713msec); 0 zone resets clat (msec): min=135, max=3672, avg=833.18, stdev=1394.79 lat (msec): min=135, max=3672, avg=833.40, stdev=1394.74 clat percentiles (msec): | 1.00th=[ 136], 5.00th=[ 136], 10.00th=[ 136], 20.00th=[ 155], | 30.00th=[ 155], 40.00th=[ 305], 50.00th=[ 305], 60.00th=[ 334], | 70.00th=[ 401], 80.00th=[ 401], 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= 1396, max= 2048, per=45.88%, avg=1902.00, stdev=283.44, samples=5 iops : min= 1, max= 2, avg= 1.20, stdev= 0.45, samples=5 lat (msec) : 100=16.67%, 250=25.00%, 500=50.00%, >=2000=8.33% cpu : usr=0.03%, sys=2.56%, ctx=67, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=6,6,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145737: Sat Sep 5 02:43:37 2026 read: IOPS=0, BW=770KiB/s (789kB/s)(5120KiB/6649msec) clat (msec): min=63, max=277, avg=127.34, stdev=86.60 lat (msec): min=63, max=277, avg=127.34, stdev=86.60 clat percentiles (msec): | 1.00th=[ 64], 5.00th=[ 64], 10.00th=[ 64], 20.00th=[ 64], | 30.00th=[ 82], 40.00th=[ 82], 50.00th=[ 91], 60.00th=[ 91], | 70.00th=[ 124], 80.00th=[ 124], 90.00th=[ 279], 95.00th=[ 279], | 99.00th=[ 279], 99.50th=[ 279], 99.90th=[ 279], 99.95th=[ 279], | 99.99th=[ 279] bw ( KiB/s): min= 2000, max= 6083, per=100.00%, avg=4041.50, stdev=2887.12, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 write: IOPS=1, BW=1078KiB/s (1104kB/s)(7168KiB/6649msec); 0 zone resets clat (msec): min=102, max=3605, avg=809.42, stdev=1257.14 lat (msec): min=102, max=3605, avg=809.88, stdev=1257.14 clat percentiles (msec): | 1.00th=[ 104], 5.00th=[ 104], 10.00th=[ 104], 20.00th=[ 138], | 30.00th=[ 192], 40.00th=[ 192], 50.00th=[ 271], 60.00th=[ 609], | 70.00th=[ 609], 80.00th=[ 751], 90.00th=[ 3608], 95.00th=[ 3608], | 99.00th=[ 3608], 99.50th=[ 3608], 99.90th=[ 3608], 99.95th=[ 3608], | 99.99th=[ 3608] bw ( KiB/s): min= 1462, max= 2035, per=45.87%, avg=1901.60, stdev=246.60, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 lat (msec) : 100=25.00%, 250=33.33%, 500=16.67%, 750=8.33%, 1000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=3.34%, ctx=95, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=5,7,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=2962KiB/s (3033kB/s), 296KiB/s-1054KiB/s (303kB/s-1079kB/s), io=20.0MiB (20.0MB), run=6649-6914msec WRITE: bw=4147KiB/s (4246kB/s), 753KiB/s-1481KiB/s (771kB/s-1517kB/s), io=28.0MiB (29.4MB), run=6649-6914msec 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=145746: Sat Sep 5 02:43:51 2026 read: IOPS=1, BW=4357KiB/s (4462kB/s)(12.0MiB/2820msec) clat (msec): min=685, max=1066, avg=906.13, stdev=197.11 lat (msec): min=685, max=1066, avg=906.13, stdev=197.11 clat percentiles (msec): | 1.00th=[ 684], 5.00th=[ 684], 10.00th=[ 684], 20.00th=[ 684], | 30.00th=[ 684], 40.00th=[ 969], 50.00th=[ 969], 60.00th=[ 969], | 70.00th=[ 1070], 80.00th=[ 1070], 90.00th=[ 1070], 95.00th=[ 1070], | 99.00th=[ 1070], 99.50th=[ 1070], 99.90th=[ 1070], 99.95th=[ 1070], | 99.99th=[ 1070] bw ( KiB/s): min= 7922, max= 8192, per=100.00%, avg=8057.00, stdev=190.92, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 750=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=16.18%, ctx=417, 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=145747: Sat Sep 5 02:43:51 2026 read: IOPS=0, BW=1189KiB/s (1217kB/s)(4096KiB/3446msec) clat (nsec): min=621617k, max=621617k, avg=621616791.00, stdev= 0.00 lat (nsec): min=621619k, max=621619k, avg=621619058.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 625], 5.00th=[ 625], 10.00th=[ 625], 20.00th=[ 625], | 30.00th=[ 625], 40.00th=[ 625], 50.00th=[ 625], 60.00th=[ 625], | 70.00th=[ 625], 80.00th=[ 625], 90.00th=[ 625], 95.00th=[ 625], | 99.00th=[ 625], 99.50th=[ 625], 99.90th=[ 625], 99.95th=[ 625], | 99.99th=[ 625] bw ( KiB/s): min= 7922, max= 7922, per=100.00%, avg=7922.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2377KiB/s (2434kB/s)(8192KiB/3446msec); 0 zone resets clat (msec): min=883, max=1892, avg=1387.89, stdev=713.98 lat (msec): min=884, max=1893, avg=1388.89, stdev=713.19 clat percentiles (msec): | 1.00th=[ 885], 5.00th=[ 885], 10.00th=[ 885], 20.00th=[ 885], | 30.00th=[ 885], 40.00th=[ 885], 50.00th=[ 885], 60.00th=[ 1888], | 70.00th=[ 1888], 80.00th=[ 1888], 90.00th=[ 1888], 95.00th=[ 1888], | 99.00th=[ 1888], 99.50th=[ 1888], 99.90th=[ 1888], 99.95th=[ 1888], | 99.99th=[ 1888] bw ( KiB/s): min= 8078, max= 8078, per=85.30%, avg=8078.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 750=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=2.03%, ctx=104, 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=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=145751: Sat Sep 5 02:43:51 2026 write: IOPS=0, BW=3551KiB/s (3637kB/s)(12.0MiB/3460msec); 0 zone resets clat (msec): min=952, max=1392, avg=1139.20, stdev=227.37 lat (msec): min=953, max=1393, avg=1140.15, stdev=227.33 clat percentiles (msec): | 1.00th=[ 953], 5.00th=[ 953], 10.00th=[ 953], 20.00th=[ 953], | 30.00th=[ 953], 40.00th=[ 1070], 50.00th=[ 1070], 60.00th=[ 1070], | 70.00th=[ 1385], 80.00th=[ 1385], 90.00th=[ 1385], 95.00th=[ 1385], | 99.00th=[ 1385], 99.50th=[ 1385], 99.90th=[ 1385], 99.95th=[ 1385], | 99.99th=[ 1385] bw ( KiB/s): min= 7922, max= 8192, per=85.08%, avg=8057.00, stdev=190.92, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 1000=33.33%, 2000=66.67% cpu : usr=0.00%, sys=6.13%, ctx=92, 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=145753: Sat Sep 5 02:43:51 2026 write: IOPS=1, BW=5481KiB/s (5612kB/s)(12.0MiB/2242msec); 0 zone resets clat (msec): min=472, max=1236, avg=733.71, stdev=435.64 lat (msec): min=473, max=1237, avg=734.65, stdev=435.37 clat percentiles (msec): | 1.00th=[ 472], 5.00th=[ 472], 10.00th=[ 472], 20.00th=[ 472], | 30.00th=[ 472], 40.00th=[ 493], 50.00th=[ 493], 60.00th=[ 493], | 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= 6918, max= 7922, per=78.35%, avg=7420.00, stdev=709.94, 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=0.04%, sys=5.62%, ctx=53, 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=4754KiB/s (4869kB/s), 1189KiB/s-4357KiB/s (1217kB/s-4462kB/s), io=16.0MiB (16.8MB), run=2820-3446msec WRITE: bw=9471KiB/s (9698kB/s), 2377KiB/s-5481KiB/s (2434kB/s-5612kB/s), io=32.0MiB (33.6MB), run=2242-3460msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145748: Sat Sep 5 02:43:51 2026 read: IOPS=0, BW=3002KiB/s (3074kB/s)(12.0MiB/4093msec) clat (msec): min=1081, max=1524, avg=1348.42, stdev=234.78 lat (msec): min=1081, max=1524, avg=1348.42, stdev=234.78 clat percentiles (msec): | 1.00th=[ 1083], 5.00th=[ 1083], 10.00th=[ 1083], 20.00th=[ 1083], | 30.00th=[ 1083], 40.00th=[ 1435], 50.00th=[ 1435], 60.00th=[ 1435], | 70.00th=[ 1519], 80.00th=[ 1519], 90.00th=[ 1519], 95.00th=[ 1519], | 99.00th=[ 1519], 99.50th=[ 1519], 99.90th=[ 1519], 99.95th=[ 1519], | 99.99th=[ 1519] bw ( KiB/s): min= 8062, max= 8094, per=100.00%, avg=8078.00, stdev=22.63, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 2000=100.00% cpu : usr=0.00%, sys=2.47%, ctx=51, 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=145749: Sat Sep 5 02:43:51 2026 read: IOPS=0, BW=1063KiB/s (1088kB/s)(4096KiB/3854msec) clat (nsec): min=1658.0M, max=1658.0M, avg=1658982924.00, stdev= 0.00 lat (nsec): min=1658.0M, max=1658.0M, avg=1658985786.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1653], 5.00th=[ 1653], 10.00th=[ 1653], 20.00th=[ 1653], | 30.00th=[ 1653], 40.00th=[ 1653], 50.00th=[ 1653], 60.00th=[ 1653], | 70.00th=[ 1653], 80.00th=[ 1653], 90.00th=[ 1653], 95.00th=[ 1653], | 99.00th=[ 1653], 99.50th=[ 1653], 99.90th=[ 1653], 99.95th=[ 1653], | 99.99th=[ 1653] bw ( KiB/s): min= 8031, max= 8031, per=100.00%, avg=8031.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2126KiB/s (2177kB/s)(8192KiB/3854msec); 0 zone resets clat (msec): min=874, max=1225, avg=1050.00, stdev=247.98 lat (msec): min=875, max=1227, avg=1051.20, stdev=248.82 clat percentiles (msec): | 1.00th=[ 877], 5.00th=[ 877], 10.00th=[ 877], 20.00th=[ 877], | 30.00th=[ 877], 40.00th=[ 877], 50.00th=[ 877], 60.00th=[ 1234], | 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= 8062, max= 8062, per=95.88%, avg=8062.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 1000=33.33%, 2000=66.67% cpu : usr=0.00%, sys=2.98%, 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=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=145750: Sat Sep 5 02:43:51 2026 write: IOPS=0, BW=3153KiB/s (3229kB/s)(12.0MiB/3897msec); 0 zone resets clat (msec): min=1006, max=1567, avg=1283.69, stdev=280.40 lat (msec): min=1013, max=1567, avg=1286.03, stdev=277.59 clat percentiles (msec): | 1.00th=[ 1011], 5.00th=[ 1011], 10.00th=[ 1011], 20.00th=[ 1011], | 30.00th=[ 1011], 40.00th=[ 1284], 50.00th=[ 1284], 60.00th=[ 1284], | 70.00th=[ 1569], 80.00th=[ 1569], 90.00th=[ 1569], 95.00th=[ 1569], | 99.00th=[ 1569], 99.50th=[ 1569], 99.90th=[ 1569], 99.95th=[ 1569], | 99.99th=[ 1569] bw ( KiB/s): min= 8062, max= 8094, per=96.08%, avg=8078.00, stdev=22.63, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 2000=100.00% cpu : usr=0.00%, sys=2.23%, ctx=43, 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=145752: Sat Sep 5 02:43:51 2026 write: IOPS=1, BW=4292KiB/s (4395kB/s)(12.0MiB/2863msec); 0 zone resets clat (msec): min=356, max=1499, avg=912.49, stdev=571.94 lat (msec): min=357, max=1499, avg=913.10, stdev=571.93 clat percentiles (msec): | 1.00th=[ 359], 5.00th=[ 359], 10.00th=[ 359], 20.00th=[ 359], | 30.00th=[ 359], 40.00th=[ 885], 50.00th=[ 885], 60.00th=[ 885], | 70.00th=[ 1502], 80.00th=[ 1502], 90.00th=[ 1502], 95.00th=[ 1502], | 99.00th=[ 1502], 99.50th=[ 1502], 99.90th=[ 1502], 99.95th=[ 1502], | 99.99th=[ 1502] bw ( KiB/s): min= 7984, max= 8143, per=95.90%, avg=8063.50, stdev=112.43, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=4.44%, ctx=67, majf=0, minf=9 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=4003KiB/s (4099kB/s), 1063KiB/s-3002KiB/s (1088kB/s-3074kB/s), io=16.0MiB (16.8MB), run=3854-4093msec WRITE: bw=8409KiB/s (8610kB/s), 2126KiB/s-4292KiB/s (2177kB/s-4395kB/s), io=32.0MiB (33.6MB), run=2863-3897msec