== sanity test 398b: DIO and buffer IO race ============== 00:29:24 (1787372964) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 7.27521 s, 6.9 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=179675: Sat Aug 22 00:31:45 2026 read: IOPS=12, BW=50.3KiB/s (51.5kB/s)(5992KiB/119112msec) clat (usec): min=40, max=423542, avg=43795.46, stdev=29625.41 lat (usec): min=41, max=423544, avg=43803.74, stdev=29627.79 clat percentiles (usec): | 1.00th=[ 54], 5.00th=[ 11076], 10.00th=[ 16581], 20.00th=[ 22152], | 30.00th=[ 27132], 40.00th=[ 32113], 50.00th=[ 38011], 60.00th=[ 45351], | 70.00th=[ 52167], 80.00th=[ 61604], 90.00th=[ 77071], 95.00th=[ 92799], | 99.00th=[152044], 99.50th=[177210], 99.90th=[244319], 99.95th=[421528], | 99.99th=[421528] bw ( KiB/s): min= 7, max= 103, per=24.89%, avg=49.79, stdev=18.11, samples=234 iops : min= 1, max= 25, avg=11.80, stdev= 4.57, samples=234 write: IOPS=13, BW=52.9KiB/s (54.1kB/s)(6296KiB/119112msec); 0 zone resets clat (usec): min=967, max=921634, avg=33689.24, stdev=40815.72 lat (usec): min=968, max=921634, avg=33691.38, stdev=40815.48 clat percentiles (usec): | 1.00th=[ 1074], 5.00th=[ 1287], 10.00th=[ 1762], 20.00th=[ 3851], | 30.00th=[ 7046], 40.00th=[ 15008], 50.00th=[ 25297], 60.00th=[ 33162], | 70.00th=[ 42730], 80.00th=[ 57934], 90.00th=[ 79168], 95.00th=[ 98042], | 99.00th=[145753], 99.50th=[158335], 99.90th=[287310], 99.95th=[918553], | 99.99th=[918553] bw ( KiB/s): min= 7, max= 141, per=25.08%, avg=52.41, stdev=21.17, samples=234 iops : min= 1, max= 35, avg=12.46, stdev= 5.31, samples=234 lat (usec) : 50=0.16%, 100=1.43%, 250=0.20%, 750=0.03%, 1000=0.07% lat (msec) : 2=5.76%, 4=4.92%, 10=7.55%, 20=10.25%, 50=40.76% lat (msec) : 100=24.67%, 250=4.07%, 500=0.10%, 1000=0.03% cpu : usr=0.08%, sys=5.30%, ctx=6582, majf=0, minf=17 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=179676: Sat Aug 22 00:31:45 2026 read: IOPS=12, BW=50.3KiB/s (51.5kB/s)(5940KiB/118157msec) clat (usec): min=32, max=222403, avg=43653.69, stdev=29384.74 lat (usec): min=32, max=222404, avg=43659.81, stdev=29381.90 clat percentiles (usec): | 1.00th=[ 53], 5.00th=[ 8160], 10.00th=[ 15270], 20.00th=[ 21627], | 30.00th=[ 25822], 40.00th=[ 31327], 50.00th=[ 36963], 60.00th=[ 43779], | 70.00th=[ 52691], 80.00th=[ 63177], 90.00th=[ 80217], 95.00th=[ 99091], | 99.00th=[141558], 99.50th=[177210], 99.90th=[212861], 99.95th=[223347], | 99.99th=[223347] bw ( KiB/s): min= 7, max= 96, per=24.94%, avg=49.88, stdev=18.04, samples=232 iops : min= 1, max= 24, avg=11.83, stdev= 4.57, samples=232 write: IOPS=13, BW=53.7KiB/s (55.0kB/s)(6348KiB/118157msec); 0 zone resets clat (usec): min=881, max=882152, avg=33296.99, stdev=40519.47 lat (usec): min=882, max=882153, avg=33300.16, stdev=40519.53 clat percentiles (usec): | 1.00th=[ 1074], 5.00th=[ 1254], 10.00th=[ 1827], 20.00th=[ 3589], | 30.00th=[ 6390], 40.00th=[ 13304], 50.00th=[ 23462], 60.00th=[ 32113], | 70.00th=[ 41157], 80.00th=[ 56886], 90.00th=[ 81265], 95.00th=[101188], | 99.00th=[145753], 99.50th=[173016], 99.90th=[212861], 99.95th=[884999], | 99.99th=[884999] bw ( KiB/s): min= 7, max= 119, per=25.49%, avg=53.27, stdev=20.91, samples=232 iops : min= 1, max= 29, avg=12.68, stdev= 5.26, samples=232 lat (usec) : 50=0.33%, 100=1.56%, 250=0.33%, 1000=0.07% lat (msec) : 2=5.83%, 4=5.34%, 10=8.11%, 20=10.51%, 50=39.39% lat (msec) : 100=23.54%, 250=4.98%, 1000=0.03% cpu : usr=0.08%, sys=5.40%, ctx=6491, majf=0, minf=17 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1485,1587,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179677: Sat Aug 22 00:31:45 2026 read: IOPS=12, BW=50.4KiB/s (51.6kB/s)(6028KiB/119686msec) clat (usec): min=35, max=276974, avg=43183.44, stdev=28578.18 lat (usec): min=36, max=276975, avg=43191.10, stdev=28585.51 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 9503], 10.00th=[ 16188], 20.00th=[ 21627], | 30.00th=[ 26608], 40.00th=[ 31589], 50.00th=[ 37487], 60.00th=[ 43779], | 70.00th=[ 52167], 80.00th=[ 62129], 90.00th=[ 76022], 95.00th=[ 91751], | 99.00th=[143655], 99.50th=[162530], 99.90th=[233833], 99.95th=[278922], | 99.99th=[278922] bw ( KiB/s): min= 7, max= 127, per=25.06%, avg=50.12, stdev=18.28, samples=234 iops : min= 1, max= 31, avg=11.88, stdev= 4.59, samples=234 write: IOPS=13, BW=52.3KiB/s (53.6kB/s)(6260KiB/119686msec); 0 zone resets clat (usec): min=981, max=900050, avg=34565.74, stdev=41197.20 lat (usec): min=982, max=900052, avg=34568.80, stdev=41196.41 clat percentiles (usec): | 1.00th=[ 1074], 5.00th=[ 1237], 10.00th=[ 1893], 20.00th=[ 4228], | 30.00th=[ 7963], 40.00th=[ 16450], 50.00th=[ 25035], 60.00th=[ 33424], | 70.00th=[ 43779], 80.00th=[ 58459], 90.00th=[ 81265], 95.00th=[101188], | 99.00th=[154141], 99.50th=[198181], 99.90th=[250610], 99.95th=[901776], | 99.99th=[901776] bw ( KiB/s): min= 7, max= 135, per=24.87%, avg=51.97, stdev=21.77, samples=234 iops : min= 1, max= 33, avg=12.35, stdev= 5.47, samples=234 lat (usec) : 50=0.39%, 100=1.50%, 250=0.13%, 500=0.10%, 1000=0.07% lat (msec) : 2=5.31%, 4=4.43%, 10=7.94%, 20=10.84%, 50=40.69% lat (msec) : 100=24.32%, 250=4.20%, 500=0.07%, 1000=0.03% cpu : usr=0.08%, sys=5.28%, ctx=6611, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179678: Sat Aug 22 00:31:45 2026 read: IOPS=12, BW=50.5KiB/s (51.7kB/s)(6052KiB/119763msec) clat (usec): min=45, max=921256, avg=42762.50, stdev=36890.66 lat (usec): min=46, max=921257, avg=42764.18, stdev=36891.10 clat percentiles (usec): | 1.00th=[ 53], 5.00th=[ 971], 10.00th=[ 14615], 20.00th=[ 20841], | 30.00th=[ 26346], 40.00th=[ 31851], 50.00th=[ 36963], 60.00th=[ 42730], | 70.00th=[ 49546], 80.00th=[ 59507], 90.00th=[ 74974], 95.00th=[ 95945], | 99.00th=[143655], 99.50th=[204473], 99.90th=[346031], 99.95th=[918553], | 99.99th=[918553] bw ( KiB/s): min= 7, max= 132, per=25.09%, avg=50.18, stdev=20.22, samples=236 iops : min= 1, max= 33, avg=11.91, stdev= 5.10, samples=236 write: IOPS=13, BW=52.1KiB/s (53.3kB/s)(6236KiB/119763msec); 0 zone resets clat (usec): min=961, max=269537, avg=35010.76, stdev=36346.32 lat (usec): min=963, max=269538, avg=35013.89, stdev=36347.33 clat percentiles (usec): | 1.00th=[ 1106], 5.00th=[ 1287], 10.00th=[ 1991], 20.00th=[ 4228], | 30.00th=[ 7504], 40.00th=[ 16319], 50.00th=[ 25560], 60.00th=[ 33817], | 70.00th=[ 44827], 80.00th=[ 60556], 90.00th=[ 83362], 95.00th=[105382], | 99.00th=[160433], 99.50th=[173016], 99.90th=[235930], 99.95th=[270533], | 99.99th=[270533] bw ( KiB/s): min= 7, max= 143, per=24.85%, avg=51.94, stdev=21.85, samples=235 iops : min= 1, max= 35, avg=12.34, stdev= 5.50, samples=235 lat (usec) : 50=0.16%, 100=1.89%, 250=0.33%, 500=0.03%, 1000=0.16% lat (msec) : 2=5.01%, 4=4.46%, 10=8.07%, 20=11.20%, 50=40.85% lat (msec) : 100=22.88%, 250=4.85%, 500=0.07%, 1000=0.03% cpu : usr=0.07%, sys=5.20%, ctx=6556, majf=0, minf=17 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=200KiB/s (205kB/s), 50.3KiB/s-50.5KiB/s (51.5kB/s-51.7kB/s), io=23.4MiB (24.6MB), run=118157-119763msec WRITE: bw=210KiB/s (215kB/s), 52.1KiB/s-53.7KiB/s (53.3kB/s-55.0kB/s), io=24.6MiB (25.7MB), run=118157-119763msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179680: Sat Aug 22 00:32:25 2026 read: IOPS=9, BW=37.7KiB/s (38.6kB/s)(5992KiB/159056msec) clat (msec): min=5, max=946, avg=40.51, stdev=41.98 lat (msec): min=5, max=946, avg=40.51, stdev=41.98 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 20], 40.00th=[ 24], 50.00th=[ 28], 60.00th=[ 34], | 70.00th=[ 43], 80.00th=[ 57], 90.00th=[ 88], 95.00th=[ 115], | 99.00th=[ 180], 99.50th=[ 203], 99.90th=[ 264], 99.95th=[ 944], | 99.99th=[ 944] bw ( KiB/s): min= 7, max= 127, per=25.21%, avg=37.81, stdev=24.29, samples=308 iops : min= 1, max= 31, avg= 8.81, stdev= 6.12, samples=308 write: IOPS=9, BW=39.6KiB/s (40.5kB/s)(6296KiB/159056msec); 0 zone resets clat (msec): min=8, max=401, avg=62.42, stdev=43.47 lat (msec): min=8, max=401, avg=62.42, stdev=43.47 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 21], 10.00th=[ 25], 20.00th=[ 31], | 30.00th=[ 36], 40.00th=[ 42], 50.00th=[ 49], 60.00th=[ 59], | 70.00th=[ 71], 80.00th=[ 89], 90.00th=[ 118], 95.00th=[ 146], | 99.00th=[ 218], 99.50th=[ 268], 99.90th=[ 355], 99.95th=[ 401], | 99.99th=[ 401] bw ( KiB/s): min= 7, max= 127, per=25.13%, avg=39.46, stdev=22.44, samples=310 iops : min= 1, max= 31, avg= 9.22, stdev= 5.64, samples=310 lat (msec) : 10=1.79%, 20=15.69%, 50=46.55%, 100=24.48%, 250=11.07% lat (msec) : 500=0.39%, 1000=0.03% cpu : usr=0.05%, sys=1.82%, ctx=4818, 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=179681: Sat Aug 22 00:32:25 2026 read: IOPS=9, BW=37.2KiB/s (38.1kB/s)(5940KiB/159667msec) clat (msec): min=4, max=985, avg=41.69, stdev=44.56 lat (msec): min=4, max=985, avg=41.70, stdev=44.56 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 20], 40.00th=[ 24], 50.00th=[ 28], 60.00th=[ 34], | 70.00th=[ 44], 80.00th=[ 59], 90.00th=[ 92], 95.00th=[ 121], | 99.00th=[ 192], 99.50th=[ 241], 99.90th=[ 266], 99.95th=[ 986], | 99.99th=[ 986] bw ( KiB/s): min= 7, max= 127, per=25.00%, avg=37.50, stdev=24.05, samples=307 iops : min= 1, max= 31, avg= 8.73, stdev= 6.07, samples=307 write: IOPS=9, BW=39.8KiB/s (40.7kB/s)(6348KiB/159667msec); 0 zone resets clat (msec): min=12, max=403, avg=61.51, stdev=40.78 lat (msec): min=12, max=403, avg=61.51, stdev=40.78 clat percentiles (msec): | 1.00th=[ 16], 5.00th=[ 22], 10.00th=[ 25], 20.00th=[ 31], | 30.00th=[ 36], 40.00th=[ 43], 50.00th=[ 49], 60.00th=[ 59], | 70.00th=[ 72], 80.00th=[ 89], 90.00th=[ 113], 95.00th=[ 136], | 99.00th=[ 207], 99.50th=[ 234], 99.90th=[ 351], 99.95th=[ 405], | 99.99th=[ 405] bw ( KiB/s): min= 7, max= 119, per=25.02%, avg=39.27, stdev=22.22, samples=313 iops : min= 1, max= 29, avg= 9.18, stdev= 5.58, samples=313 lat (msec) : 10=1.92%, 20=15.79%, 50=45.35%, 100=25.72%, 250=10.90% lat (msec) : 500=0.29%, 1000=0.03% cpu : usr=0.05%, sys=1.75%, ctx=4626, 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=179682: Sat Aug 22 00:32:25 2026 read: IOPS=9, BW=37.8KiB/s (38.7kB/s)(6028KiB/159620msec) clat (msec): min=5, max=316, avg=40.37, stdev=36.25 lat (msec): min=5, max=316, avg=40.37, stdev=36.25 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 20], 40.00th=[ 24], 50.00th=[ 28], 60.00th=[ 34], | 70.00th=[ 42], 80.00th=[ 57], 90.00th=[ 86], 95.00th=[ 117], | 99.00th=[ 182], 99.50th=[ 207], 99.90th=[ 279], 99.95th=[ 317], | 99.99th=[ 317] bw ( KiB/s): min= 7, max= 127, per=25.23%, avg=37.85, stdev=23.94, samples=309 iops : min= 1, max= 31, avg= 8.82, stdev= 6.04, samples=309 write: IOPS=9, BW=39.2KiB/s (40.2kB/s)(6260KiB/159620msec); 0 zone resets clat (msec): min=12, max=993, avg=63.02, stdev=47.93 lat (msec): min=12, max=993, avg=63.02, stdev=47.93 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 22], 10.00th=[ 26], 20.00th=[ 32], | 30.00th=[ 36], 40.00th=[ 42], 50.00th=[ 49], 60.00th=[ 59], | 70.00th=[ 72], 80.00th=[ 90], 90.00th=[ 117], 95.00th=[ 144], | 99.00th=[ 222], 99.50th=[ 259], 99.90th=[ 313], 99.95th=[ 995], | 99.99th=[ 995] bw ( KiB/s): min= 7, max= 103, per=24.86%, avg=39.04, stdev=22.21, samples=311 iops : min= 1, max= 25, avg= 9.11, stdev= 5.59, samples=311 lat (msec) : 10=2.57%, 20=14.42%, 50=46.65%, 100=24.45%, 250=11.43% lat (msec) : 500=0.46%, 1000=0.03% cpu : usr=0.06%, sys=1.77%, ctx=4578, 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=179683: Sat Aug 22 00:32:25 2026 read: IOPS=9, BW=38.0KiB/s (38.9kB/s)(6052KiB/159245msec) clat (msec): min=5, max=279, avg=42.07, stdev=38.26 lat (msec): min=5, max=279, avg=42.08, stdev=38.26 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 16], | 30.00th=[ 20], 40.00th=[ 24], 50.00th=[ 28], 60.00th=[ 35], | 70.00th=[ 46], 80.00th=[ 62], 90.00th=[ 95], 95.00th=[ 124], | 99.00th=[ 184], 99.50th=[ 234], 99.90th=[ 266], 99.95th=[ 279], | 99.99th=[ 279] bw ( KiB/s): min= 7, max= 125, per=25.82%, avg=38.72, stdev=24.47, samples=305 iops : min= 1, max= 31, avg= 9.04, stdev= 6.15, samples=305 write: IOPS=9, BW=39.2KiB/s (40.1kB/s)(6236KiB/159245msec); 0 zone resets clat (msec): min=9, max=999, avg=61.22, stdev=46.51 lat (msec): min=9, max=999, avg=61.23, stdev=46.52 clat percentiles (msec): | 1.00th=[ 16], 5.00th=[ 21], 10.00th=[ 25], 20.00th=[ 31], | 30.00th=[ 35], 40.00th=[ 41], 50.00th=[ 48], 60.00th=[ 58], | 70.00th=[ 72], 80.00th=[ 88], 90.00th=[ 115], 95.00th=[ 140], | 99.00th=[ 205], 99.50th=[ 253], 99.90th=[ 347], 99.95th=[ 1003], | 99.99th=[ 1003] bw ( KiB/s): min= 7, max= 119, per=24.84%, avg=39.00, stdev=23.19, samples=312 iops : min= 1, max= 29, avg= 9.11, stdev= 5.84, samples=312 lat (msec) : 10=2.28%, 20=16.28%, 50=44.69%, 100=25.00%, 250=11.33% lat (msec) : 500=0.39%, 1000=0.03% cpu : usr=0.05%, sys=1.81%, ctx=4719, 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=150KiB/s (154kB/s), 37.2KiB/s-38.0KiB/s (38.1kB/s-38.9kB/s), io=23.4MiB (24.6MB), run=159056-159667msec WRITE: bw=157KiB/s (161kB/s), 39.2KiB/s-39.8KiB/s (40.1kB/s-40.7kB/s), io=24.6MiB (25.7MB), run=159056-159667msec 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=179726: Sat Aug 22 00:33:07 2026 read: IOPS=11, BW=192KiB/s (196kB/s)(5920KiB/30880msec) clat (usec): min=33, max=184667, avg=44340.30, stdev=30344.84 lat (usec): min=34, max=184668, avg=44342.91, stdev=30345.98 clat percentiles (usec): | 1.00th=[ 55], 5.00th=[ 69], 10.00th=[ 14091], 20.00th=[ 23987], | 30.00th=[ 28181], 40.00th=[ 32637], 50.00th=[ 36963], 60.00th=[ 44303], | 70.00th=[ 53740], 80.00th=[ 63701], 90.00th=[ 83362], 95.00th=[ 98042], | 99.00th=[147850], 99.50th=[181404], 99.90th=[185598], 99.95th=[185598], | 99.99th=[185598] bw ( KiB/s): min= 63, max= 378, per=24.63%, avg=190.88, stdev=67.58, samples=60 iops : min= 3, max= 23, avg=11.13, stdev= 4.23, samples=60 write: IOPS=12, BW=206KiB/s (211kB/s)(6368KiB/30880msec); 0 zone resets clat (usec): min=1293, max=185835, avg=35538.24, stdev=32180.33 lat (usec): min=1295, max=185837, avg=35545.92, stdev=32183.66 clat percentiles (usec): | 1.00th=[ 1696], 5.00th=[ 2573], 10.00th=[ 3687], 20.00th=[ 6325], | 30.00th=[ 11469], 40.00th=[ 19530], 50.00th=[ 27395], 60.00th=[ 36439], | 70.00th=[ 47449], 80.00th=[ 58459], 90.00th=[ 81265], 95.00th=[101188], | 99.00th=[131597], 99.50th=[154141], 99.90th=[185598], 99.95th=[185598], | 99.99th=[185598] bw ( KiB/s): min= 42, max= 416, per=25.32%, avg=206.58, stdev=90.52, samples=60 iops : min= 2, max= 26, avg=12.13, stdev= 5.71, samples=60 lat (usec) : 50=0.39%, 100=2.99%, 250=0.65%, 750=0.13%, 1000=0.13% lat (msec) : 2=1.17%, 4=4.95%, 10=8.72%, 20=9.11%, 50=41.15% lat (msec) : 100=25.91%, 250=4.69% cpu : usr=0.07%, sys=6.03%, ctx=1770, 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=179727: Sat Aug 22 00:33:07 2026 read: IOPS=11, BW=189KiB/s (194kB/s)(5744KiB/30332msec) clat (usec): min=37, max=193192, avg=45224.90, stdev=29214.36 lat (usec): min=37, max=193193, avg=45226.18, stdev=29214.39 clat percentiles (usec): | 1.00th=[ 55], 5.00th=[ 68], 10.00th=[ 14615], 20.00th=[ 23725], | 30.00th=[ 30016], 40.00th=[ 35914], 50.00th=[ 41681], 60.00th=[ 46924], | 70.00th=[ 54789], 80.00th=[ 65274], 90.00th=[ 83362], 95.00th=[ 94897], | 99.00th=[131597], 99.50th=[183501], 99.90th=[193987], 99.95th=[193987], | 99.99th=[193987] bw ( KiB/s): min= 63, max= 318, per=24.34%, avg=188.64, stdev=68.10, samples=59 iops : min= 3, max= 19, avg=11.00, stdev= 4.29, samples=59 write: IOPS=13, BW=216KiB/s (221kB/s)(6544KiB/30332msec); 0 zone resets clat (usec): min=1525, max=155360, avg=34140.83, stdev=31700.07 lat (usec): min=1526, max=155363, avg=34174.38, stdev=31677.97 clat percentiles (usec): | 1.00th=[ 1663], 5.00th=[ 2212], 10.00th=[ 3458], 20.00th=[ 6063], | 30.00th=[ 10683], 40.00th=[ 16909], 50.00th=[ 25560], 60.00th=[ 33817], | 70.00th=[ 44827], 80.00th=[ 57410], 90.00th=[ 82314], 95.00th=[ 96994], | 99.00th=[141558], 99.50th=[147850], 99.90th=[156238], 99.95th=[156238], | 99.99th=[156238] bw ( KiB/s): min= 93, max= 383, per=26.29%, avg=214.53, stdev=77.91, samples=59 iops : min= 5, max= 23, avg=12.63, stdev= 4.92, samples=59 lat (usec) : 50=0.39%, 100=3.26%, 250=0.26%, 500=0.26% lat (msec) : 2=2.47%, 4=4.30%, 10=8.72%, 20=10.55%, 50=40.36% lat (msec) : 100=25.52%, 250=3.91% cpu : usr=0.07%, sys=6.18%, ctx=1763, 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=179729: Sat Aug 22 00:33:07 2026 read: IOPS=12, BW=207KiB/s (212kB/s)(6256KiB/30284msec) clat (usec): min=41, max=232426, avg=41682.85, stdev=28515.15 lat (usec): min=41, max=232427, avg=41685.30, stdev=28516.36 clat percentiles (usec): | 1.00th=[ 50], 5.00th=[ 69], 10.00th=[ 113], 20.00th=[ 21103], | 30.00th=[ 27919], 40.00th=[ 33162], 50.00th=[ 38536], 60.00th=[ 45351], | 70.00th=[ 53216], 80.00th=[ 61604], 90.00th=[ 74974], 95.00th=[ 89654], | 99.00th=[127402], 99.50th=[160433], 99.90th=[231736], 99.95th=[231736], | 99.99th=[231736] bw ( KiB/s): min= 42, max= 448, per=26.75%, avg=207.32, stdev=79.73, samples=59 iops : min= 2, max= 28, avg=12.19, stdev= 5.05, samples=59 write: IOPS=12, BW=199KiB/s (204kB/s)(6032KiB/30284msec); 0 zone resets clat (usec): min=1523, max=155872, avg=35990.05, stdev=31020.28 lat (usec): min=1525, max=155874, avg=35994.13, stdev=31020.59 clat percentiles (usec): | 1.00th=[ 1696], 5.00th=[ 2802], 10.00th=[ 4293], 20.00th=[ 7308], | 30.00th=[ 11994], 40.00th=[ 19792], 50.00th=[ 28967], 60.00th=[ 35914], | 70.00th=[ 45876], 80.00th=[ 62129], 90.00th=[ 80217], 95.00th=[100140], | 99.00th=[122160], 99.50th=[135267], 99.90th=[156238], 99.95th=[156238], | 99.99th=[156238] bw ( KiB/s): min= 31, max= 508, per=24.06%, avg=196.34, stdev=88.84, samples=59 iops : min= 1, max= 31, avg=11.49, stdev= 5.59, samples=59 lat (usec) : 50=0.52%, 100=4.17%, 250=1.17%, 500=0.52%, 1000=0.13% lat (msec) : 2=1.69%, 4=2.73%, 10=8.72%, 20=9.38%, 50=41.54% lat (msec) : 100=25.78%, 250=3.65% cpu : usr=0.07%, sys=5.96%, ctx=1812, 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=179731: Sat Aug 22 00:33:07 2026 read: IOPS=12, BW=204KiB/s (209kB/s)(6032KiB/29542msec) clat (usec): min=36, max=157836, avg=42586.60, stdev=28258.77 lat (usec): min=36, max=157837, avg=42589.02, stdev=28259.15 clat percentiles (usec): | 1.00th=[ 48], 5.00th=[ 66], 10.00th=[ 94], 20.00th=[ 21103], | 30.00th=[ 28181], 40.00th=[ 33424], 50.00th=[ 39060], 60.00th=[ 45351], | 70.00th=[ 52691], 80.00th=[ 61080], 90.00th=[ 77071], 95.00th=[ 99091], | 99.00th=[133694], 99.50th=[145753], 99.90th=[158335], 99.95th=[158335], | 99.99th=[158335] bw ( KiB/s): min= 62, max= 447, per=26.40%, avg=204.57, stdev=75.70, samples=58 iops : min= 3, max= 27, avg=12.02, stdev= 4.73, samples=58 write: IOPS=13, BW=212KiB/s (217kB/s)(6256KiB/29542msec); 0 zone resets clat (usec): min=1571, max=174186, avg=33730.53, stdev=31931.14 lat (usec): min=1572, max=174189, avg=33733.02, stdev=31930.75 clat percentiles (usec): | 1.00th=[ 1696], 5.00th=[ 2573], 10.00th=[ 3359], 20.00th=[ 5473], | 30.00th=[ 8455], 40.00th=[ 15401], 50.00th=[ 25822], 60.00th=[ 34866], | 70.00th=[ 45351], 80.00th=[ 57934], 90.00th=[ 83362], 95.00th=[ 98042], | 99.00th=[135267], 99.50th=[149947], 99.90th=[175113], 99.95th=[175113], | 99.99th=[175113] bw ( KiB/s): min= 63, max= 476, per=26.09%, avg=212.86, stdev=73.60, samples=58 iops : min= 3, max= 29, avg=12.53, stdev= 4.58, samples=58 lat (usec) : 50=0.65%, 100=4.30%, 250=0.26%, 750=0.26%, 1000=0.13% lat (msec) : 2=1.17%, 4=5.86%, 10=9.90%, 20=8.98%, 50=39.58% lat (msec) : 100=24.48%, 250=4.43% cpu : usr=0.06%, sys=6.28%, ctx=1724, 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=776KiB/s (794kB/s), 189KiB/s-207KiB/s (194kB/s-212kB/s), io=23.4MiB (24.5MB), run=29542-30880msec WRITE: bw=816KiB/s (836kB/s), 199KiB/s-216KiB/s (204kB/s-221kB/s), io=24.6MiB (25.8MB), run=29542-30880msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179728: Sat Aug 22 00:33:19 2026 read: IOPS=8, BW=138KiB/s (141kB/s)(5920KiB/42935msec) clat (msec): min=5, max=253, avg=45.45, stdev=34.36 lat (msec): min=5, max=253, avg=45.47, stdev=34.35 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 13], 10.00th=[ 15], 20.00th=[ 20], | 30.00th=[ 24], 40.00th=[ 28], 50.00th=[ 34], 60.00th=[ 42], | 70.00th=[ 52], 80.00th=[ 68], 90.00th=[ 90], 95.00th=[ 115], | 99.00th=[ 163], 99.50th=[ 169], 99.90th=[ 255], 99.95th=[ 255], | 99.99th=[ 255] bw ( KiB/s): min= 31, max= 544, per=25.11%, avg=138.61, stdev=82.49, samples=83 iops : min= 1, max= 34, avg= 7.86, stdev= 5.22, samples=83 write: IOPS=9, BW=148KiB/s (152kB/s)(6368KiB/42935msec); 0 zone resets clat (msec): min=15, max=263, avg=64.93, stdev=39.65 lat (msec): min=15, max=263, avg=64.94, stdev=39.65 clat percentiles (msec): | 1.00th=[ 19], 5.00th=[ 27], 10.00th=[ 30], 20.00th=[ 36], | 30.00th=[ 41], 40.00th=[ 46], 50.00th=[ 52], 60.00th=[ 61], | 70.00th=[ 74], 80.00th=[ 90], 90.00th=[ 118], 95.00th=[ 142], | 99.00th=[ 205], 99.50th=[ 245], 99.90th=[ 264], 99.95th=[ 264], | 99.99th=[ 264] bw ( KiB/s): min= 31, max= 350, per=25.62%, avg=148.60, stdev=72.30, samples=84 iops : min= 1, max= 21, avg= 8.49, stdev= 4.56, samples=84 lat (msec) : 10=0.78%, 20=10.16%, 50=47.01%, 100=29.82%, 250=11.98% lat (msec) : 500=0.26% cpu : usr=0.06%, sys=1.91%, ctx=1184, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179730: Sat Aug 22 00:33:19 2026 read: IOPS=8, BW=132KiB/s (136kB/s)(5744KiB/43375msec) clat (msec): min=9, max=299, avg=47.10, stdev=39.33 lat (msec): min=9, max=299, avg=47.11, stdev=39.33 clat percentiles (msec): | 1.00th=[ 11], 5.00th=[ 13], 10.00th=[ 16], 20.00th=[ 20], | 30.00th=[ 24], 40.00th=[ 29], 50.00th=[ 35], 60.00th=[ 43], | 70.00th=[ 52], 80.00th=[ 68], 90.00th=[ 95], 95.00th=[ 126], | 99.00th=[ 213], 99.50th=[ 271], 99.90th=[ 300], 99.95th=[ 300], | 99.99th=[ 300] bw ( KiB/s): min= 21, max= 448, per=24.08%, avg=132.92, stdev=83.70, samples=84 iops : min= 1, max= 28, avg= 7.50, stdev= 5.33, samples=84 write: IOPS=9, BW=151KiB/s (154kB/s)(6544KiB/43375msec); 0 zone resets clat (msec): min=12, max=291, avg=63.80, stdev=39.23 lat (msec): min=12, max=291, avg=63.81, stdev=39.23 clat percentiles (msec): | 1.00th=[ 18], 5.00th=[ 22], 10.00th=[ 27], 20.00th=[ 34], | 30.00th=[ 40], 40.00th=[ 46], 50.00th=[ 54], 60.00th=[ 62], | 70.00th=[ 74], 80.00th=[ 91], 90.00th=[ 113], 95.00th=[ 134], | 99.00th=[ 226], 99.50th=[ 239], 99.90th=[ 292], 99.95th=[ 292], | 99.99th=[ 292] bw ( KiB/s): min= 31, max= 319, per=25.76%, avg=149.41, stdev=71.74, samples=85 iops : min= 1, max= 19, avg= 8.54, stdev= 4.51, samples=85 lat (msec) : 10=0.13%, 20=11.20%, 50=45.31%, 100=31.51%, 250=11.33% lat (msec) : 500=0.52% cpu : usr=0.04%, sys=1.89%, ctx=1227, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=359,409,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179732: Sat Aug 22 00:33:19 2026 read: IOPS=9, BW=145KiB/s (148kB/s)(6256KiB/43231msec) clat (msec): min=7, max=246, avg=46.64, stdev=35.82 lat (msec): min=7, max=246, avg=46.64, stdev=35.82 clat percentiles (msec): | 1.00th=[ 11], 5.00th=[ 14], 10.00th=[ 16], 20.00th=[ 22], | 30.00th=[ 26], 40.00th=[ 30], 50.00th=[ 36], 60.00th=[ 43], | 70.00th=[ 51], 80.00th=[ 65], 90.00th=[ 100], 95.00th=[ 128], | 99.00th=[ 169], 99.50th=[ 186], 99.90th=[ 247], 99.95th=[ 247], | 99.99th=[ 247] bw ( KiB/s): min= 31, max= 477, per=26.32%, avg=145.26, stdev=86.30, samples=85 iops : min= 1, max= 29, avg= 8.28, stdev= 5.44, samples=85 write: IOPS=8, BW=140KiB/s (143kB/s)(6032KiB/43231msec); 0 zone resets clat (msec): min=15, max=276, avg=65.47, stdev=37.86 lat (msec): min=15, max=276, avg=65.48, stdev=37.86 clat percentiles (msec): | 1.00th=[ 21], 5.00th=[ 24], 10.00th=[ 27], 20.00th=[ 34], | 30.00th=[ 42], 40.00th=[ 49], 50.00th=[ 57], 60.00th=[ 66], | 70.00th=[ 79], 80.00th=[ 93], 90.00th=[ 116], 95.00th=[ 136], | 99.00th=[ 201], 99.50th=[ 236], 99.90th=[ 275], 99.95th=[ 275], | 99.99th=[ 275] bw ( KiB/s): min= 31, max= 351, per=23.86%, avg=138.38, stdev=67.17, samples=85 iops : min= 1, max= 21, avg= 7.85, stdev= 4.24, samples=85 lat (msec) : 10=0.65%, 20=8.98%, 50=46.22%, 100=31.77%, 250=12.24% lat (msec) : 500=0.13% cpu : usr=0.06%, sys=1.99%, ctx=1200, 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=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=179733: Sat Aug 22 00:33:19 2026 read: IOPS=8, BW=141KiB/s (144kB/s)(6032KiB/42873msec) clat (msec): min=6, max=225, avg=47.54, stdev=39.41 lat (msec): min=6, max=225, avg=47.54, stdev=39.41 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 12], 10.00th=[ 15], 20.00th=[ 21], | 30.00th=[ 26], 40.00th=[ 30], 50.00th=[ 35], 60.00th=[ 41], | 70.00th=[ 50], 80.00th=[ 67], 90.00th=[ 102], 95.00th=[ 134], | 99.00th=[ 207], 99.50th=[ 213], 99.90th=[ 226], 99.95th=[ 226], | 99.99th=[ 226] bw ( KiB/s): min= 31, max= 347, per=25.55%, avg=141.02, stdev=72.26, samples=83 iops : min= 1, max= 21, avg= 8.00, stdev= 4.53, samples=83 write: IOPS=9, BW=146KiB/s (149kB/s)(6256KiB/42873msec); 0 zone resets clat (msec): min=14, max=237, avg=63.65, stdev=36.93 lat (msec): min=14, max=237, avg=63.66, stdev=36.93 clat percentiles (msec): | 1.00th=[ 18], 5.00th=[ 24], 10.00th=[ 28], 20.00th=[ 34], | 30.00th=[ 39], 40.00th=[ 46], 50.00th=[ 53], 60.00th=[ 63], | 70.00th=[ 73], 80.00th=[ 90], 90.00th=[ 114], 95.00th=[ 142], | 99.00th=[ 178], 99.50th=[ 209], 99.90th=[ 239], 99.95th=[ 239], | 99.99th=[ 239] bw ( KiB/s): min= 31, max= 448, per=25.43%, avg=147.48, stdev=80.13, samples=83 iops : min= 1, max= 28, avg= 8.41, stdev= 5.08, samples=83 lat (msec) : 10=0.78%, 20=10.29%, 50=46.74%, 100=29.17%, 250=13.02% cpu : usr=0.06%, sys=2.05%, ctx=1219, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=552KiB/s (565kB/s), 132KiB/s-145KiB/s (136kB/s-148kB/s), io=23.4MiB (24.5MB), run=42873-43375msec WRITE: bw=581KiB/s (595kB/s), 140KiB/s-151KiB/s (143kB/s-154kB/s), io=24.6MiB (25.8MB), run=42873-43375msec 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=179745: Sat Aug 22 00:33:37 2026 read: IOPS=1, BW=1378KiB/s (1411kB/s)(7168KiB/5203msec) clat (usec): min=605, max=2116.1k, avg=441388.27, stdev=747962.77 lat (usec): min=606, max=2116.1k, avg=441389.53, stdev=747962.80 clat percentiles (usec): | 1.00th=[ 603], 5.00th=[ 603], 10.00th=[ 603], | 20.00th=[ 1156], 30.00th=[ 179307], 40.00th=[ 179307], | 50.00th=[ 248513], 60.00th=[ 252707], 70.00th=[ 252707], | 80.00th=[ 291505], 90.00th=[2122318], 95.00th=[2122318], | 99.00th=[2122318], 99.50th=[2122318], 99.90th=[2122318], | 99.95th=[2122318], 99.99th=[2122318] bw ( KiB/s): min= 1882, max= 4031, per=96.49%, avg=2680.50, stdev=981.97, samples=4 iops : min= 1, max= 3, avg= 1.75, stdev= 0.96, samples=4 write: IOPS=0, BW=984KiB/s (1008kB/s)(5120KiB/5203msec); 0 zone resets clat (msec): min=127, max=1177, avg=396.95, stdev=441.58 lat (msec): min=128, max=1177, avg=397.01, stdev=441.57 clat percentiles (msec): | 1.00th=[ 129], 5.00th=[ 129], 10.00th=[ 129], 20.00th=[ 129], | 30.00th=[ 140], 40.00th=[ 140], 50.00th=[ 266], 60.00th=[ 266], | 70.00th=[ 275], 80.00th=[ 275], 90.00th=[ 1183], 95.00th=[ 1183], | 99.00th=[ 1183], 99.50th=[ 1183], 99.90th=[ 1183], 99.95th=[ 1183], | 99.99th=[ 1183] bw ( KiB/s): min= 2015, max= 3764, per=66.79%, avg=2598.00, stdev=1009.79, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 lat (usec) : 750=8.33% lat (msec) : 2=8.33%, 250=33.33%, 500=33.33%, 2000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=12.38%, ctx=475, 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=179746: Sat Aug 22 00:33:37 2026 read: IOPS=0, BW=300KiB/s (307kB/s)(2048KiB/6837msec) clat (usec): min=670, max=197907, avg=99288.89, stdev=139467.88 lat (usec): min=671, max=197909, avg=99290.57, stdev=139468.72 clat percentiles (usec): | 1.00th=[ 668], 5.00th=[ 668], 10.00th=[ 668], 20.00th=[ 668], | 30.00th=[ 668], 40.00th=[ 668], 50.00th=[ 668], 60.00th=[198181], | 70.00th=[198181], 80.00th=[198181], 90.00th=[198181], 95.00th=[198181], | 99.00th=[198181], 99.50th=[198181], 99.90th=[198181], 99.95th=[198181], | 99.99th=[198181] bw ( KiB/s): min= 1412, max= 2043, per=62.19%, avg=1727.50, stdev=446.18, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1498KiB/s (1534kB/s)(10.0MiB/6837msec); 0 zone resets clat (msec): min=96, max=2369, avg=657.32, stdev=855.07 lat (msec): min=96, max=2369, avg=657.42, stdev=855.06 clat percentiles (msec): | 1.00th=[ 97], 5.00th=[ 97], 10.00th=[ 97], 20.00th=[ 144], | 30.00th=[ 165], 40.00th=[ 188], 50.00th=[ 197], 60.00th=[ 257], | 70.00th=[ 288], 80.00th=[ 776], 90.00th=[ 2106], 95.00th=[ 2366], | 99.00th=[ 2366], 99.50th=[ 2366], 99.90th=[ 2366], 99.95th=[ 2366], | 99.99th=[ 2366] bw ( KiB/s): min= 2043, max= 6144, per=100.00%, avg=4480.25, stdev=1846.10, samples=4 iops : min= 1, max= 6, avg= 3.75, stdev= 2.22, samples=4 lat (usec) : 750=8.33% lat (msec) : 100=8.33%, 250=41.67%, 500=16.67%, 1000=8.33%, >=2000=16.67% cpu : usr=0.00%, sys=9.39%, ctx=104, 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=179747: Sat Aug 22 00:33:37 2026 read: IOPS=1, BW=1211KiB/s (1240kB/s)(6144KiB/5072msec) clat (usec): min=570, max=249947, avg=155586.30, stdev=119359.62 lat (usec): min=571, max=249948, avg=155587.62, stdev=119359.58 clat percentiles (usec): | 1.00th=[ 570], 5.00th=[ 570], 10.00th=[ 570], 20.00th=[ 3654], | 30.00th=[ 3654], 40.00th=[219153], 50.00th=[219153], 60.00th=[223347], | 70.00th=[235930], 80.00th=[235930], 90.00th=[250610], 95.00th=[250610], | 99.00th=[250610], 99.50th=[250610], 99.90th=[250610], 99.95th=[250610], | 99.99th=[250610] bw ( KiB/s): min= 1882, max= 4039, per=100.00%, avg=3314.67, stdev=1240.75, samples=3 iops : min= 1, max= 3, avg= 2.33, stdev= 1.15, samples=3 write: IOPS=1, BW=1211KiB/s (1240kB/s)(6144KiB/5072msec); 0 zone resets clat (msec): min=237, max=2437, avg=684.94, stdev=868.14 lat (msec): min=237, max=2437, avg=685.04, stdev=868.13 clat percentiles (msec): | 1.00th=[ 239], 5.00th=[ 239], 10.00th=[ 239], 20.00th=[ 241], | 30.00th=[ 241], 40.00th=[ 253], 50.00th=[ 253], 60.00th=[ 368], | 70.00th=[ 575], 80.00th=[ 575], 90.00th=[ 2433], 95.00th=[ 2433], | 99.00th=[ 2433], 99.50th=[ 2433], 99.90th=[ 2433], 99.95th=[ 2433], | 99.99th=[ 2433] bw ( KiB/s): min= 1882, max= 2043, per=51.44%, avg=2001.20, stdev=67.17, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 lat (usec) : 750=8.33% lat (msec) : 4=8.33%, 250=50.00%, 500=16.67%, 750=8.33%, >=2000=8.33% cpu : usr=0.02%, sys=12.23%, ctx=267, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=6,6,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179748: Sat Aug 22 00:33:37 2026 read: IOPS=0, BW=695KiB/s (711kB/s)(5120KiB/7370msec) clat (usec): min=703, max=2637.9k, avg=587190.64, stdev=1148548.33 lat (usec): min=704, max=2637.9k, avg=587191.91, stdev=1148547.84 clat percentiles (usec): | 1.00th=[ 701], 5.00th=[ 701], 10.00th=[ 701], | 20.00th=[ 701], 30.00th=[ 7308], 40.00th=[ 7308], | 50.00th=[ 141558], 60.00th=[ 141558], 70.00th=[ 147850], | 80.00th=[ 147850], 90.00th=[2634023], 95.00th=[2634023], | 99.00th=[2634023], 99.50th=[2634023], 99.90th=[2634023], | 99.95th=[2634023], 99.99th=[2634023] bw ( KiB/s): min= 2048, max= 6131, per=100.00%, avg=4089.50, stdev=2887.12, samples=2 iops : min= 2, max= 5, avg= 3.50, stdev= 2.12, samples=2 write: IOPS=0, BW=973KiB/s (996kB/s)(7168KiB/7370msec); 0 zone resets clat (msec): min=172, max=2385, avg=593.59, stdev=798.43 lat (msec): min=172, max=2385, avg=593.95, stdev=798.28 clat percentiles (msec): | 1.00th=[ 174], 5.00th=[ 174], 10.00th=[ 174], 20.00th=[ 180], | 30.00th=[ 199], 40.00th=[ 199], 50.00th=[ 372], 60.00th=[ 388], | 70.00th=[ 388], 80.00th=[ 460], 90.00th=[ 2400], 95.00th=[ 2400], | 99.00th=[ 2400], 99.50th=[ 2400], 99.90th=[ 2400], 99.95th=[ 2400], | 99.99th=[ 2400] bw ( KiB/s): min= 1432, max= 4031, per=59.22%, avg=2303.60, stdev=998.66, samples=5 iops : min= 1, max= 3, avg= 1.60, stdev= 0.89, samples=5 lat (usec) : 750=8.33% lat (msec) : 10=8.33%, 250=41.67%, 500=25.00%, >=2000=16.67% cpu : usr=0.00%, sys=7.86%, ctx=519, 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=2779KiB/s (2846kB/s), 300KiB/s-1378KiB/s (307kB/s-1411kB/s), io=20.0MiB (20.0MB), run=5072-7370msec WRITE: bw=3890KiB/s (3984kB/s), 973KiB/s-1498KiB/s (996kB/s-1534kB/s), io=28.0MiB (29.4MB), run=5072-7370msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179750: Sat Aug 22 00:33:38 2026 read: IOPS=0, BW=941KiB/s (963kB/s)(7168KiB/7620msec) clat (msec): min=102, max=2711, avg=856.06, stdev=1082.38 lat (msec): min=102, max=2711, avg=856.06, stdev=1082.38 clat percentiles (msec): | 1.00th=[ 103], 5.00th=[ 103], 10.00th=[ 103], 20.00th=[ 111], | 30.00th=[ 205], 40.00th=[ 205], 50.00th=[ 247], 60.00th=[ 514], | 70.00th=[ 514], 80.00th=[ 2106], 90.00th=[ 2702], 95.00th=[ 2702], | 99.00th=[ 2702], 99.50th=[ 2702], 99.90th=[ 2702], 99.95th=[ 2702], | 99.99th=[ 2702] bw ( KiB/s): min= 1818, max= 4047, per=93.32%, avg=2477.75, stdev=1050.67, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 write: IOPS=0, BW=672KiB/s (688kB/s)(5120KiB/7620msec); 0 zone resets clat (msec): min=127, max=800, avg=298.56, stdev=283.81 lat (msec): min=127, max=800, avg=298.66, stdev=283.81 clat percentiles (msec): | 1.00th=[ 128], 5.00th=[ 128], 10.00th=[ 128], 20.00th=[ 128], | 30.00th=[ 153], 40.00th=[ 153], 50.00th=[ 167], 60.00th=[ 167], | 70.00th=[ 247], 80.00th=[ 247], 90.00th=[ 802], 95.00th=[ 802], | 99.00th=[ 802], 99.50th=[ 802], 99.90th=[ 802], 99.95th=[ 802], | 99.99th=[ 802] bw ( KiB/s): min= 1753, max= 4071, per=78.34%, avg=2912.00, stdev=1639.07, samples=2 iops : min= 1, max= 3, avg= 2.00, stdev= 1.41, samples=2 lat (msec) : 250=66.67%, 750=8.33%, 1000=8.33%, >=2000=16.67% cpu : usr=0.01%, sys=2.65%, ctx=83, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=7,5,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179751: Sat Aug 22 00:33:38 2026 read: IOPS=0, BW=270KiB/s (276kB/s)(2048KiB/7594msec) clat (msec): min=436, max=1863, avg=1150.13, stdev=1009.12 lat (msec): min=436, max=1863, avg=1150.13, stdev=1009.12 clat percentiles (msec): | 1.00th=[ 439], 5.00th=[ 439], 10.00th=[ 439], 20.00th=[ 439], | 30.00th=[ 439], 40.00th=[ 439], 50.00th=[ 439], 60.00th=[ 1871], | 70.00th=[ 1871], 80.00th=[ 1871], 90.00th=[ 1871], 95.00th=[ 1871], | 99.00th=[ 1871], 99.50th=[ 1871], 99.90th=[ 1871], 99.95th=[ 1871], | 99.99th=[ 1871] bw ( KiB/s): min= 1921, max= 2035, per=74.50%, avg=1978.00, stdev=80.61, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1348KiB/s (1381kB/s)(10.0MiB/7594msec); 0 zone resets clat (msec): min=82, max=1939, avg=519.77, stdev=563.19 lat (msec): min=82, max=1939, avg=520.45, stdev=563.09 clat percentiles (msec): | 1.00th=[ 83], 5.00th=[ 83], 10.00th=[ 83], 20.00th=[ 118], | 30.00th=[ 126], 40.00th=[ 222], 50.00th=[ 236], 60.00th=[ 363], | 70.00th=[ 584], 80.00th=[ 676], 90.00th=[ 852], 95.00th=[ 1938], | 99.00th=[ 1938], 99.50th=[ 1938], 99.90th=[ 1938], 99.95th=[ 1938], | 99.99th=[ 1938] bw ( KiB/s): min= 2011, max= 4071, per=76.34%, avg=2837.40, stdev=1115.23, samples=5 iops : min= 1, max= 3, avg= 1.80, stdev= 1.10, samples=5 lat (msec) : 100=8.33%, 250=33.33%, 500=16.67%, 750=16.67%, 1000=8.33% lat (msec) : 2000=16.67% cpu : usr=0.00%, sys=2.91%, ctx=79, 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=179752: Sat Aug 22 00:33:38 2026 read: IOPS=1, BW=1113KiB/s (1140kB/s)(6144KiB/5521msec) clat (msec): min=74, max=477, avg=200.90, stdev=158.53 lat (msec): min=74, max=477, avg=200.90, stdev=158.53 clat percentiles (msec): | 1.00th=[ 75], 5.00th=[ 75], 10.00th=[ 75], 20.00th=[ 102], | 30.00th=[ 102], 40.00th=[ 110], 50.00th=[ 110], 60.00th=[ 138], | 70.00th=[ 305], 80.00th=[ 305], 90.00th=[ 477], 95.00th=[ 477], | 99.00th=[ 477], 99.50th=[ 477], 99.90th=[ 477], 99.95th=[ 477], | 99.99th=[ 477] bw ( KiB/s): min= 2011, max= 3506, per=94.66%, avg=2513.33, stdev=859.70, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 write: IOPS=1, BW=1113KiB/s (1140kB/s)(6144KiB/5521msec); 0 zone resets clat (msec): min=121, max=2701, avg=697.01, stdev=998.91 lat (msec): min=121, max=2701, avg=697.21, stdev=998.86 clat percentiles (msec): | 1.00th=[ 122], 5.00th=[ 122], 10.00th=[ 122], 20.00th=[ 163], | 30.00th=[ 163], 40.00th=[ 188], 50.00th=[ 188], 60.00th=[ 401], | 70.00th=[ 609], 80.00th=[ 609], 90.00th=[ 2702], 95.00th=[ 2702], | 99.00th=[ 2702], 99.50th=[ 2702], 99.90th=[ 2702], 99.95th=[ 2702], | 99.99th=[ 2702] bw ( KiB/s): min= 1815, max= 2031, per=53.28%, avg=1980.60, stdev=92.85, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 lat (msec) : 100=8.33%, 250=50.00%, 500=25.00%, 750=8.33%, >=2000=8.33% cpu : usr=0.04%, sys=4.26%, ctx=110, majf=0, minf=10 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=6,6,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179753: Sat Aug 22 00:33:38 2026 read: IOPS=0, BW=664KiB/s (680kB/s)(5120KiB/7712msec) clat (msec): min=73, max=1928, avg=544.53, stdev=785.46 lat (msec): min=73, max=1928, avg=544.53, stdev=785.46 clat percentiles (msec): | 1.00th=[ 74], 5.00th=[ 74], 10.00th=[ 74], 20.00th=[ 74], | 30.00th=[ 78], 40.00th=[ 78], 50.00th=[ 247], 60.00th=[ 247], | 70.00th=[ 397], 80.00th=[ 397], 90.00th=[ 1921], 95.00th=[ 1921], | 99.00th=[ 1921], 99.50th=[ 1921], 99.90th=[ 1921], 99.95th=[ 1921], | 99.99th=[ 1921] bw ( KiB/s): min= 4015, max= 4071, per=100.00%, avg=4043.00, stdev=39.60, samples=2 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=2 write: IOPS=0, BW=929KiB/s (952kB/s)(7168KiB/7712msec); 0 zone resets clat (msec): min=109, max=2634, avg=701.47, stdev=877.72 lat (msec): min=109, max=2634, avg=701.69, stdev=877.73 clat percentiles (msec): | 1.00th=[ 110], 5.00th=[ 110], 10.00th=[ 110], 20.00th=[ 171], | 30.00th=[ 368], 40.00th=[ 368], 50.00th=[ 409], 60.00th=[ 468], | 70.00th=[ 468], 80.00th=[ 751], 90.00th=[ 2635], 95.00th=[ 2635], | 99.00th=[ 2635], 99.50th=[ 2635], 99.90th=[ 2635], 99.95th=[ 2635], | 99.99th=[ 2635] bw ( KiB/s): min= 1753, max= 6059, per=74.67%, avg=2775.40, stdev=1839.28, samples=5 iops : min= 1, max= 5, avg= 1.80, stdev= 1.79, samples=5 lat (msec) : 100=16.67%, 250=25.00%, 500=33.33%, 750=8.33%, 2000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=2.58%, ctx=113, 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=2656KiB/s (2719kB/s), 270KiB/s-1113KiB/s (276kB/s-1140kB/s), io=20.0MiB (20.0MB), run=5521-7712msec WRITE: bw=3718KiB/s (3807kB/s), 672KiB/s-1348KiB/s (688kB/s-1381kB/s), io=28.0MiB (29.4MB), run=5521-7712msec 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=179766: Sat Aug 22 00:33:52 2026 read: IOPS=1, BW=4370KiB/s (4475kB/s)(12.0MiB/2812msec) clat (msec): min=583, max=1361, avg=909.36, stdev=403.92 lat (msec): min=583, max=1361, avg=909.36, stdev=403.92 clat percentiles (msec): | 1.00th=[ 584], 5.00th=[ 584], 10.00th=[ 584], 20.00th=[ 584], | 30.00th=[ 584], 40.00th=[ 785], 50.00th=[ 785], 60.00th=[ 785], | 70.00th=[ 1368], 80.00th=[ 1368], 90.00th=[ 1368], 95.00th=[ 1368], | 99.00th=[ 1368], 99.50th=[ 1368], 99.90th=[ 1368], 99.95th=[ 1368], | 99.99th=[ 1368] bw ( KiB/s): min= 8143, max= 8143, per=100.00%, avg=8143.00, stdev= 0.00, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=4.27%, ctx=50, 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=179767: Sat Aug 22 00:33:52 2026 read: IOPS=0, BW=1309KiB/s (1340kB/s)(4096KiB/3129msec) clat (nsec): min=765885k, max=765885k, avg=765884581.00, stdev= 0.00 lat (nsec): min=765888k, max=765888k, avg=765887804.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 768], 5.00th=[ 768], 10.00th=[ 768], 20.00th=[ 768], | 30.00th=[ 768], 40.00th=[ 768], 50.00th=[ 768], 60.00th=[ 768], | 70.00th=[ 768], 80.00th=[ 768], 90.00th=[ 768], 95.00th=[ 768], | 99.00th=[ 768], 99.50th=[ 768], 99.90th=[ 768], 99.95th=[ 768], | 99.99th=[ 768] bw ( KiB/s): min= 7968, max= 7968, per=100.00%, avg=7968.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2618KiB/s (2681kB/s)(8192KiB/3129msec); 0 zone resets clat (msec): min=501, max=1816, avg=1159.01, stdev=929.59 lat (msec): min=502, max=1817, avg=1159.83, stdev=930.08 clat percentiles (msec): | 1.00th=[ 502], 5.00th=[ 502], 10.00th=[ 502], 20.00th=[ 502], | 30.00th=[ 502], 40.00th=[ 502], 50.00th=[ 502], 60.00th=[ 1821], | 70.00th=[ 1821], 80.00th=[ 1821], 90.00th=[ 1821], 95.00th=[ 1821], | 99.00th=[ 1821], 99.50th=[ 1821], 99.90th=[ 1821], 99.95th=[ 1821], | 99.99th=[ 1821] bw ( KiB/s): min= 8078, max= 8078, per=77.14%, 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=0.03%, sys=3.93%, ctx=71, 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=179768: Sat Aug 22 00:33:52 2026 write: IOPS=0, BW=3950KiB/s (4045kB/s)(12.0MiB/3111msec); 0 zone resets clat (msec): min=383, max=1930, avg=1007.19, stdev=815.71 lat (msec): min=383, max=1932, avg=1008.06, stdev=816.42 clat percentiles (msec): | 1.00th=[ 384], 5.00th=[ 384], 10.00th=[ 384], 20.00th=[ 384], | 30.00th=[ 384], 40.00th=[ 709], 50.00th=[ 709], 60.00th=[ 709], | 70.00th=[ 1938], 80.00th=[ 1938], 90.00th=[ 1938], 95.00th=[ 1938], | 99.00th=[ 1938], 99.50th=[ 1938], 99.90th=[ 1938], 99.95th=[ 1938], | 99.99th=[ 1938] bw ( KiB/s): min= 8143, max= 8143, per=77.76%, 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=0.06%, sys=4.31%, ctx=67, 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=179769: Sat Aug 22 00:33:52 2026 write: IOPS=0, BW=3927KiB/s (4021kB/s)(12.0MiB/3129msec); 0 zone resets clat (msec): min=484, max=1477, avg=1011.53, stdev=499.42 lat (msec): min=484, max=1477, avg=1012.11, stdev=499.37 clat percentiles (msec): | 1.00th=[ 485], 5.00th=[ 485], 10.00th=[ 485], 20.00th=[ 485], | 30.00th=[ 485], 40.00th=[ 1070], 50.00th=[ 1070], 60.00th=[ 1070], | 70.00th=[ 1485], 80.00th=[ 1485], 90.00th=[ 1485], 95.00th=[ 1485], | 99.00th=[ 1485], 99.50th=[ 1485], 99.90th=[ 1485], 99.95th=[ 1485], | 99.99th=[ 1485] bw ( KiB/s): min= 8143, max= 8192, per=77.99%, avg=8167.50, stdev=34.65, 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=3.64%, ctx=58, 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=5236KiB/s (5362kB/s), 1309KiB/s-4370KiB/s (1340kB/s-4475kB/s), io=16.0MiB (16.8MB), run=2812-3129msec WRITE: bw=10.2MiB/s (10.7MB/s), 2618KiB/s-3950KiB/s (2681kB/s-4045kB/s), io=32.0MiB (33.6MB), run=3111-3129msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179762: Sat Aug 22 00:33:52 2026 read: IOPS=1, BW=4766KiB/s (4881kB/s)(12.0MiB/2578msec) clat (msec): min=717, max=1044, avg=836.10, stdev=180.83 lat (msec): min=717, max=1044, avg=836.10, stdev=180.83 clat percentiles (msec): | 1.00th=[ 718], 5.00th=[ 718], 10.00th=[ 718], 20.00th=[ 718], | 30.00th=[ 718], 40.00th=[ 751], 50.00th=[ 751], 60.00th=[ 751], | 70.00th=[ 1045], 80.00th=[ 1045], 90.00th=[ 1045], 95.00th=[ 1045], | 99.00th=[ 1045], 99.50th=[ 1045], 99.90th=[ 1045], 99.95th=[ 1045], | 99.99th=[ 1045] bw ( KiB/s): min= 8143, max= 8192, per=100.00%, avg=8167.50, stdev=34.65, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 750=66.67%, 2000=33.33% cpu : usr=0.00%, sys=15.79%, ctx=344, 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=179763: Sat Aug 22 00:33:52 2026 read: IOPS=0, BW=1498KiB/s (1534kB/s)(4096KiB/2735msec) clat (nsec): min=802422k, max=802422k, avg=802422095.00, stdev= 0.00 lat (nsec): min=802425k, max=802425k, avg=802424540.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 802], 5.00th=[ 802], 10.00th=[ 802], 20.00th=[ 802], | 30.00th=[ 802], 40.00th=[ 802], 50.00th=[ 802], 60.00th=[ 802], | 70.00th=[ 802], 80.00th=[ 802], 90.00th=[ 802], 95.00th=[ 802], | 99.00th=[ 802], 99.50th=[ 802], 99.90th=[ 802], 99.95th=[ 802], | 99.99th=[ 802] 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=2995KiB/s (3067kB/s)(8192KiB/2735msec); 0 zone resets clat (msec): min=820, max=1061, avg=941.10, stdev=170.92 lat (msec): min=821, max=1062, avg=941.78, stdev=170.67 clat percentiles (msec): | 1.00th=[ 818], 5.00th=[ 818], 10.00th=[ 818], 20.00th=[ 818], | 30.00th=[ 818], 40.00th=[ 818], 50.00th=[ 818], 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= 8159, max= 8159, per=90.72%, avg=8159.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 1000=66.67%, 2000=33.33% cpu : usr=0.00%, sys=4.02%, ctx=183, 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=179764: Sat Aug 22 00:33:52 2026 write: IOPS=0, BW=3373KiB/s (3454kB/s)(12.0MiB/3643msec); 0 zone resets clat (msec): min=220, max=2663, avg=1183.98, stdev=1300.25 lat (msec): min=222, max=2663, avg=1184.85, stdev=1300.08 clat percentiles (msec): | 1.00th=[ 222], 5.00th=[ 222], 10.00th=[ 222], 20.00th=[ 222], | 30.00th=[ 222], 40.00th=[ 667], 50.00th=[ 667], 60.00th=[ 667], | 70.00th=[ 2668], 80.00th=[ 2668], 90.00th=[ 2668], 95.00th=[ 2668], | 99.00th=[ 2668], 99.50th=[ 2668], 99.90th=[ 2668], 99.95th=[ 2668], | 99.99th=[ 2668] bw ( KiB/s): min= 7816, max= 8143, per=88.72%, avg=7979.50, stdev=231.22, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 250=33.33%, 750=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=3.05%, ctx=74, 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=179765: Sat Aug 22 00:33:52 2026 write: IOPS=0, BW=4033KiB/s (4130kB/s)(12.0MiB/3047msec); 0 zone resets clat (msec): min=550, max=1756, avg=972.52, stdev=679.97 lat (msec): min=550, max=1757, avg=972.86, stdev=680.07 clat percentiles (msec): | 1.00th=[ 550], 5.00th=[ 550], 10.00th=[ 550], 20.00th=[ 550], | 30.00th=[ 550], 40.00th=[ 609], 50.00th=[ 609], 60.00th=[ 609], | 70.00th=[ 1754], 80.00th=[ 1754], 90.00th=[ 1754], 95.00th=[ 1754], | 99.00th=[ 1754], 99.50th=[ 1754], 99.90th=[ 1754], 99.95th=[ 1754], | 99.99th=[ 1754] bw ( KiB/s): min= 8143, max= 8192, per=90.81%, avg=8167.50, stdev=34.65, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 750=66.67%, 2000=33.33% cpu : usr=0.03%, sys=4.20%, ctx=68, 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=5990KiB/s (6134kB/s), 1498KiB/s-4766KiB/s (1534kB/s-4881kB/s), io=16.0MiB (16.8MB), run=2578-2735msec WRITE: bw=8995KiB/s (9211kB/s), 2995KiB/s-4033KiB/s (3067kB/s-4130kB/s), io=32.0MiB (33.6MB), run=2735-3643msec