== sanity test 398b: DIO and buffer IO race ============== 03:22:11 (1789024931) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 6.43443 s, 7.8 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=145929: Thu Sep 10 03:24:37 2026 read: IOPS=12, BW=48.1KiB/s (49.2kB/s)(5992KiB/124670msec) clat (usec): min=32, max=709532, avg=41289.90, stdev=40283.49 lat (usec): min=32, max=709534, avg=41292.12, stdev=40285.37 clat percentiles (usec): | 1.00th=[ 48], 5.00th=[ 59], 10.00th=[ 8979], 20.00th=[ 17957], | 30.00th=[ 23462], 40.00th=[ 28705], 50.00th=[ 33817], 60.00th=[ 40109], | 70.00th=[ 49021], 80.00th=[ 58983], 90.00th=[ 79168], 95.00th=[ 95945], | 99.00th=[152044], 99.50th=[187696], 99.90th=[633340], 99.95th=[708838], | 99.99th=[708838] bw ( KiB/s): min= 7, max= 111, per=24.96%, avg=47.67, stdev=20.38, samples=245 iops : min= 1, max= 27, avg=11.29, stdev= 5.13, samples=245 write: IOPS=12, BW=50.5KiB/s (51.7kB/s)(6296KiB/124670msec); 0 zone resets clat (usec): min=893, max=309931, avg=39813.44, stdev=39824.50 lat (usec): min=894, max=309932, avg=39817.49, stdev=39822.97 clat percentiles (usec): | 1.00th=[ 1037], 5.00th=[ 1139], 10.00th=[ 1467], 20.00th=[ 4228], | 30.00th=[ 9765], 40.00th=[ 19006], 50.00th=[ 30016], 60.00th=[ 40633], | 70.00th=[ 53216], 80.00th=[ 68682], 90.00th=[ 92799], 95.00th=[116917], | 99.00th=[173016], 99.50th=[196084], 99.90th=[278922], 99.95th=[308282], | 99.99th=[308282] bw ( KiB/s): min= 7, max= 133, per=25.15%, avg=50.30, stdev=21.29, samples=244 iops : min= 1, max= 33, avg=11.93, stdev= 5.36, samples=244 lat (usec) : 50=0.65%, 100=3.19%, 250=0.26%, 500=0.20%, 750=0.07% lat (usec) : 1000=0.23% lat (msec) : 2=6.12%, 4=3.52%, 10=6.38%, 20=11.85%, 50=37.30% lat (msec) : 100=23.73%, 250=6.28%, 500=0.13%, 750=0.10% cpu : usr=0.07%, sys=5.12%, ctx=6393, 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=145930: Thu Sep 10 03:24:37 2026 read: IOPS=12, BW=48.3KiB/s (49.4kB/s)(5940KiB/123005msec) clat (usec): min=35, max=742666, avg=40714.90, stdev=37238.50 lat (usec): min=35, max=742667, avg=40716.14, stdev=37238.48 clat percentiles (usec): | 1.00th=[ 46], 5.00th=[ 56], 10.00th=[ 200], 20.00th=[ 17171], | 30.00th=[ 23725], 40.00th=[ 29492], 50.00th=[ 34341], 60.00th=[ 41157], | 70.00th=[ 48497], 80.00th=[ 58983], 90.00th=[ 77071], 95.00th=[ 93848], | 99.00th=[152044], 99.50th=[210764], 99.90th=[484443], 99.95th=[742392], | 99.99th=[742392] bw ( KiB/s): min= 7, max= 103, per=25.21%, avg=48.15, stdev=20.31, samples=241 iops : min= 1, max= 25, avg=11.40, stdev= 5.11, samples=241 write: IOPS=12, BW=51.6KiB/s (52.8kB/s)(6348KiB/123005msec); 0 zone resets clat (usec): min=938, max=422513, avg=39317.62, stdev=42119.69 lat (usec): min=939, max=422515, avg=39322.69, stdev=42116.86 clat percentiles (usec): | 1.00th=[ 1020], 5.00th=[ 1123], 10.00th=[ 1221], 20.00th=[ 3097], | 30.00th=[ 7177], 40.00th=[ 15270], 50.00th=[ 27395], 60.00th=[ 37487], | 70.00th=[ 52691], 80.00th=[ 70779], 90.00th=[ 94897], 95.00th=[124257], | 99.00th=[173016], 99.50th=[191890], 99.90th=[258999], 99.95th=[421528], | 99.99th=[421528] bw ( KiB/s): min= 7, max= 150, per=25.64%, avg=51.28, stdev=22.63, samples=242 iops : min= 1, max= 37, avg=12.19, stdev= 5.71, samples=242 lat (usec) : 50=0.88%, 100=3.81%, 250=0.23%, 500=0.10%, 750=0.07% lat (usec) : 1000=0.23% lat (msec) : 2=8.11%, 4=3.26%, 10=6.32%, 20=11.33%, 50=35.03% lat (msec) : 100=24.12%, 250=6.41%, 500=0.10%, 750=0.03% cpu : usr=0.08%, sys=4.91%, ctx=6165, 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=145931: Thu Sep 10 03:24:37 2026 read: IOPS=11, BW=47.0KiB/s (49.1kB/s)(6028KiB/125590msec) clat (usec): min=34, max=242593, avg=39165.08, stdev=29320.78 lat (usec): min=34, max=242595, avg=39168.98, stdev=29322.64 clat percentiles (usec): | 1.00th=[ 49], 5.00th=[ 57], 10.00th=[ 7898], 20.00th=[ 17957], | 30.00th=[ 23200], 40.00th=[ 28181], 50.00th=[ 32900], 60.00th=[ 39584], | 70.00th=[ 48497], 80.00th=[ 58459], 90.00th=[ 76022], 95.00th=[ 91751], | 99.00th=[131597], 99.50th=[156238], 99.90th=[240124], 99.95th=[242222], | 99.99th=[242222] bw ( KiB/s): min= 7, max= 117, per=25.11%, avg=47.97, stdev=21.38, samples=245 iops : min= 1, max= 29, avg=11.34, stdev= 5.38, samples=245 write: IOPS=12, BW=49.8KiB/s (51.0kB/s)(6260KiB/125590msec); 0 zone resets clat (usec): min=979, max=1055.1k, avg=42467.02, stdev=50897.19 lat (usec): min=980, max=1055.1k, avg=42468.66, stdev=50897.58 clat percentiles (usec): | 1.00th=[ 1029], 5.00th=[ 1123], 10.00th=[ 1319], | 20.00th=[ 4228], 30.00th=[ 8717], 40.00th=[ 20317], | 50.00th=[ 31065], 60.00th=[ 42730], 70.00th=[ 54789], | 80.00th=[ 71828], 90.00th=[ 99091], 95.00th=[ 122160], | 99.00th=[ 202376], 99.50th=[ 252707], 99.90th=[ 375391], | 99.95th=[1052771], 99.99th=[1052771] bw ( KiB/s): min= 8, max= 143, per=24.95%, avg=49.91, stdev=23.24, samples=244 iops : min= 2, max= 35, avg=11.84, stdev= 5.85, samples=244 lat (usec) : 50=0.75%, 100=3.65%, 250=0.29%, 500=0.07%, 1000=0.16% lat (msec) : 2=6.71%, 4=3.16%, 10=6.90%, 20=10.48%, 50=37.04% lat (msec) : 100=24.19%, 250=6.32%, 500=0.26%, 2000=0.03% cpu : usr=0.06%, sys=4.87%, ctx=6254, 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=145932: Thu Sep 10 03:24:37 2026 read: IOPS=12, BW=49.6KiB/s (50.8kB/s)(6052KiB/121932msec) clat (usec): min=31, max=387927, avg=38569.17, stdev=30693.71 lat (usec): min=31, max=387928, avg=38571.46, stdev=30695.44 clat percentiles (usec): | 1.00th=[ 46], 5.00th=[ 55], 10.00th=[ 412], 20.00th=[ 17171], | 30.00th=[ 22152], 40.00th=[ 27919], 50.00th=[ 32900], 60.00th=[ 39060], | 70.00th=[ 47449], 80.00th=[ 56886], 90.00th=[ 73925], 95.00th=[ 90702], | 99.00th=[131597], 99.50th=[149947], 99.90th=[383779], 99.95th=[387974], | 99.99th=[387974] bw ( KiB/s): min= 7, max= 111, per=26.02%, avg=49.70, stdev=20.27, samples=238 iops : min= 1, max= 27, avg=11.79, stdev= 5.12, samples=238 write: IOPS=12, BW=51.1KiB/s (52.4kB/s)(6236KiB/121932msec); 0 zone resets clat (usec): min=833, max=836176, avg=40659.54, stdev=47278.48 lat (usec): min=834, max=836178, avg=40661.54, stdev=47278.70 clat percentiles (usec): | 1.00th=[ 1020], 5.00th=[ 1123], 10.00th=[ 1270], 20.00th=[ 3851], | 30.00th=[ 8717], 40.00th=[ 17957], 50.00th=[ 30016], 60.00th=[ 41157], | 70.00th=[ 52691], 80.00th=[ 68682], 90.00th=[ 94897], 95.00th=[116917], | 99.00th=[191890], 99.50th=[227541], 99.90th=[505414], 99.95th=[834667], | 99.99th=[834667] bw ( KiB/s): min= 7, max= 124, per=25.40%, avg=50.80, stdev=21.72, samples=240 iops : min= 1, max= 31, avg=12.07, stdev= 5.47, samples=240 lat (usec) : 50=1.11%, 100=3.45%, 250=0.33%, 500=0.07%, 750=0.03% lat (usec) : 1000=0.33% lat (msec) : 2=7.00%, 4=3.35%, 10=6.22%, 20=11.69%, 50=36.62% lat (msec) : 100=23.89%, 250=5.66%, 500=0.20%, 750=0.03%, 1000=0.03% cpu : usr=0.07%, sys=5.03%, ctx=6200, 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=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=191KiB/s (196kB/s), 47.0KiB/s-49.6KiB/s (49.1kB/s-50.8kB/s), io=23.4MiB (24.6MB), run=121932-125590msec WRITE: bw=200KiB/s (205kB/s), 49.8KiB/s-51.6KiB/s (51.0kB/s-52.8kB/s), io=24.6MiB (25.7MB), run=121932-125590msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145924: Thu Sep 10 03:27:05 2026 read: IOPS=5, BW=21.8KiB/s (22.3kB/s)(5992KiB/274722msec) clat (msec): min=5, max=1507, avg=38.53, stdev=54.18 lat (msec): min=5, max=1507, avg=38.53, stdev=54.18 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 10], 10.00th=[ 11], 20.00th=[ 15], | 30.00th=[ 18], 40.00th=[ 22], 50.00th=[ 27], 60.00th=[ 33], | 70.00th=[ 39], 80.00th=[ 52], 90.00th=[ 79], 95.00th=[ 108], | 99.00th=[ 186], 99.50th=[ 271], 99.90th=[ 531], 99.95th=[ 1502], | 99.99th=[ 1502] bw ( KiB/s): min= 7, max= 95, per=28.25%, avg=24.58, stdev=16.75, samples=471 iops : min= 1, max= 23, avg= 5.53, stdev= 4.25, samples=471 write: IOPS=5, BW=22.9KiB/s (23.5kB/s)(6296KiB/274722msec); 0 zone resets clat (msec): min=36, max=517, avg=137.56, stdev=64.94 lat (msec): min=36, max=517, avg=137.57, stdev=64.94 clat percentiles (msec): | 1.00th=[ 47], 5.00th=[ 62], 10.00th=[ 72], 20.00th=[ 86], | 30.00th=[ 99], 40.00th=[ 109], 50.00th=[ 123], 60.00th=[ 138], | 70.00th=[ 157], 80.00th=[ 184], 90.00th=[ 222], 95.00th=[ 266], | 99.00th=[ 359], 99.50th=[ 401], 99.90th=[ 456], 99.95th=[ 518], | 99.99th=[ 518] bw ( KiB/s): min= 7, max= 55, per=24.91%, avg=22.67, stdev= 9.92, samples=535 iops : min= 1, max= 13, avg= 5.05, stdev= 2.53, samples=535 lat (msec) : 10=3.55%, 20=13.90%, 50=22.01%, 100=22.59%, 250=34.41% lat (msec) : 500=3.42%, 750=0.10%, 2000=0.03% cpu : usr=0.04%, sys=1.12%, ctx=5483, 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=145925: Thu Sep 10 03:27:05 2026 read: IOPS=5, BW=21.7KiB/s (22.2kB/s)(5940KiB/274301msec) clat (msec): min=5, max=1534, avg=37.76, stdev=53.76 lat (msec): min=5, max=1534, avg=37.76, stdev=53.76 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 15], | 30.00th=[ 18], 40.00th=[ 22], 50.00th=[ 26], 60.00th=[ 31], | 70.00th=[ 38], 80.00th=[ 48], 90.00th=[ 74], 95.00th=[ 110], | 99.00th=[ 201], 99.50th=[ 230], 99.90th=[ 510], 99.95th=[ 1536], | 99.99th=[ 1536] bw ( KiB/s): min= 7, max= 87, per=28.06%, avg=24.41, stdev=16.09, samples=470 iops : min= 1, max= 21, avg= 5.49, stdev= 4.04, samples=470 write: IOPS=5, BW=23.1KiB/s (23.7kB/s)(6348KiB/274301msec); 0 zone resets clat (msec): min=32, max=662, avg=137.17, stdev=66.95 lat (msec): min=32, max=662, avg=137.17, stdev=66.95 clat percentiles (msec): | 1.00th=[ 46], 5.00th=[ 62], 10.00th=[ 71], 20.00th=[ 85], | 30.00th=[ 96], 40.00th=[ 109], 50.00th=[ 123], 60.00th=[ 136], | 70.00th=[ 155], 80.00th=[ 182], 90.00th=[ 224], 95.00th=[ 271], | 99.00th=[ 359], 99.50th=[ 405], 99.90th=[ 617], 99.95th=[ 659], | 99.99th=[ 659] bw ( KiB/s): min= 7, max= 63, per=25.12%, avg=22.86, stdev=10.27, samples=535 iops : min= 1, max= 15, avg= 5.09, stdev= 2.63, samples=535 lat (msec) : 10=4.39%, 20=12.76%, 50=22.98%, 100=22.14%, 250=34.15% lat (msec) : 500=3.45%, 750=0.10%, 2000=0.03% cpu : usr=0.04%, sys=1.23%, ctx=5548, 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=145926: Thu Sep 10 03:27:05 2026 read: IOPS=5, BW=22.1KiB/s (22.6kB/s)(6028KiB/273275msec) clat (msec): min=5, max=445, avg=36.28, stdev=33.89 lat (msec): min=5, max=445, avg=36.28, stdev=33.89 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 15], | 30.00th=[ 18], 40.00th=[ 22], 50.00th=[ 27], 60.00th=[ 32], | 70.00th=[ 39], 80.00th=[ 50], 90.00th=[ 79], 95.00th=[ 102], | 99.00th=[ 161], 99.50th=[ 205], 99.90th=[ 359], 99.95th=[ 447], | 99.99th=[ 447] bw ( KiB/s): min= 7, max= 104, per=27.95%, avg=24.32, stdev=16.22, samples=479 iops : min= 1, max= 26, avg= 5.45, stdev= 4.08, samples=479 write: IOPS=5, BW=22.9KiB/s (23.5kB/s)(6260KiB/273275msec); 0 zone resets clat (msec): min=35, max=1849, avg=139.37, stdev=78.37 lat (msec): min=35, max=1849, avg=139.38, stdev=78.37 clat percentiles (msec): | 1.00th=[ 51], 5.00th=[ 65], 10.00th=[ 73], 20.00th=[ 87], | 30.00th=[ 99], 40.00th=[ 111], 50.00th=[ 125], 60.00th=[ 140], | 70.00th=[ 157], 80.00th=[ 180], 90.00th=[ 220], 95.00th=[ 271], | 99.00th=[ 359], 99.50th=[ 405], 99.90th=[ 651], 99.95th=[ 1854], | 99.99th=[ 1854] bw ( KiB/s): min= 7, max= 56, per=24.96%, avg=22.72, stdev= 9.84, samples=531 iops : min= 1, max= 14, avg= 5.06, stdev= 2.51, samples=531 lat (msec) : 10=4.49%, 20=12.83%, 50=22.62%, 100=22.53%, 250=34.11% lat (msec) : 500=3.29%, 750=0.10%, 2000=0.03% cpu : usr=0.04%, sys=1.17%, ctx=5370, 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=145927: Thu Sep 10 03:27:05 2026 read: IOPS=5, BW=22.3KiB/s (22.8kB/s)(6052KiB/271461msec) clat (msec): min=4, max=448, avg=35.31, stdev=32.29 lat (msec): min=4, max=448, avg=35.31, stdev=32.29 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 18], 40.00th=[ 22], 50.00th=[ 26], 60.00th=[ 31], | 70.00th=[ 39], 80.00th=[ 48], 90.00th=[ 74], 95.00th=[ 102], | 99.00th=[ 146], 99.50th=[ 182], 99.90th=[ 309], 99.95th=[ 447], | 99.99th=[ 447] bw ( KiB/s): min= 7, max= 80, per=28.79%, avg=25.04, stdev=16.62, samples=467 iops : min= 1, max= 20, avg= 5.64, stdev= 4.17, samples=467 write: IOPS=5, BW=22.0KiB/s (23.5kB/s)(6236KiB/271461msec); 0 zone resets clat (msec): min=41, max=1657, avg=139.55, stdev=75.61 lat (msec): min=41, max=1657, avg=139.55, stdev=75.61 clat percentiles (msec): | 1.00th=[ 52], 5.00th=[ 64], 10.00th=[ 73], 20.00th=[ 87], | 30.00th=[ 97], 40.00th=[ 112], 50.00th=[ 125], 60.00th=[ 138], | 70.00th=[ 159], 80.00th=[ 182], 90.00th=[ 224], 95.00th=[ 266], | 99.00th=[ 351], 99.50th=[ 397], 99.90th=[ 609], 99.95th=[ 1653], | 99.99th=[ 1653] bw ( KiB/s): min= 7, max= 48, per=24.89%, avg=22.65, stdev= 9.92, samples=529 iops : min= 1, max= 12, avg= 5.04, stdev= 2.54, samples=529 lat (msec) : 10=4.17%, 20=13.90%, 50=22.43%, 100=22.17%, 250=33.76% lat (msec) : 500=3.45%, 750=0.10%, 2000=0.03% cpu : usr=0.04%, sys=1.10%, ctx=5496, 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=87.4KiB/s (89.5kB/s), 21.7KiB/s-22.3KiB/s (22.2kB/s-22.8kB/s), io=23.4MiB (24.6MB), run=271461-274722msec WRITE: bw=91.5KiB/s (93.7kB/s), 22.9KiB/s-23.1KiB/s (23.5kB/s-23.7kB/s), io=24.6MiB (25.7MB), run=271461-274722msec 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=145986: Thu Sep 10 03:27:38 2026 read: IOPS=16, BW=265KiB/s (272kB/s)(5920KiB/22321msec) clat (usec): min=33, max=219721, avg=28737.30, stdev=28551.29 lat (usec): min=33, max=219723, avg=28739.85, stdev=28549.78 clat percentiles (usec): | 1.00th=[ 38], 5.00th=[ 48], 10.00th=[ 55], 20.00th=[ 66], | 30.00th=[ 10683], 40.00th=[ 20055], 50.00th=[ 25822], 60.00th=[ 30016], | 70.00th=[ 38011], 80.00th=[ 47449], 90.00th=[ 60031], 95.00th=[ 73925], | 99.00th=[154141], 99.50th=[179307], 99.90th=[219153], 99.95th=[219153], | 99.99th=[219153] bw ( KiB/s): min= 94, max= 665, per=24.31%, avg=260.81, stdev=115.58, samples=43 iops : min= 5, max= 41, avg=15.53, stdev= 7.26, samples=43 write: IOPS=17, BW=285KiB/s (292kB/s)(6368KiB/22321msec); 0 zone resets clat (usec): min=1372, max=215423, avg=29272.35, stdev=29443.04 lat (usec): min=1373, max=215425, avg=29274.93, stdev=29442.62 clat percentiles (usec): | 1.00th=[ 1450], 5.00th=[ 1631], 10.00th=[ 2089], 20.00th=[ 4621], | 30.00th=[ 7242], 40.00th=[ 12911], 50.00th=[ 21365], 60.00th=[ 28967], | 70.00th=[ 39060], 80.00th=[ 49021], 90.00th=[ 65799], 95.00th=[ 82314], | 99.00th=[126354], 99.50th=[158335], 99.90th=[214959], 99.95th=[214959], | 99.99th=[214959] bw ( KiB/s): min= 94, max= 509, per=25.16%, avg=283.86, stdev=87.98, samples=43 iops : min= 5, max= 31, avg=17.00, stdev= 5.49, samples=43 lat (usec) : 50=2.99%, 100=10.03%, 250=0.26% lat (msec) : 2=5.08%, 4=4.95%, 10=9.11%, 20=12.11%, 50=36.72% lat (msec) : 100=16.28%, 250=2.47% cpu : usr=0.10%, sys=6.31%, ctx=1342, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145987: Thu Sep 10 03:27:38 2026 read: IOPS=16, BW=264KiB/s (271kB/s)(5744KiB/21732msec) clat (usec): min=35, max=161093, avg=29304.71, stdev=24710.79 lat (usec): min=35, max=161095, avg=29321.61, stdev=24710.43 clat percentiles (usec): | 1.00th=[ 40], 5.00th=[ 51], 10.00th=[ 58], 20.00th=[ 68], | 30.00th=[ 15139], 40.00th=[ 22152], 50.00th=[ 26084], 60.00th=[ 33817], | 70.00th=[ 41157], 80.00th=[ 49546], 90.00th=[ 58459], 95.00th=[ 71828], | 99.00th=[ 89654], 99.50th=[120062], 99.90th=[160433], 99.95th=[160433], | 99.99th=[160433] bw ( KiB/s): min= 53, max= 569, per=25.14%, avg=269.71, stdev=112.80, samples=41 iops : min= 3, max= 35, avg=16.10, stdev= 7.07, samples=41 write: IOPS=18, BW=301KiB/s (308kB/s)(6544KiB/21732msec); 0 zone resets clat (usec): min=1320, max=284471, avg=27323.76, stdev=32784.79 lat (usec): min=1321, max=284473, avg=27338.00, stdev=32781.93 clat percentiles (usec): | 1.00th=[ 1418], 5.00th=[ 1582], 10.00th=[ 1729], 20.00th=[ 3130], | 30.00th=[ 6194], 40.00th=[ 9896], 50.00th=[ 14484], 60.00th=[ 22414], | 70.00th=[ 34866], 80.00th=[ 47449], 90.00th=[ 66847], 95.00th=[ 88605], | 99.00th=[137364], 99.50th=[179307], 99.90th=[283116], 99.95th=[283116], | 99.99th=[283116] bw ( KiB/s): min= 94, max= 538, per=26.29%, avg=296.50, stdev=106.61, samples=42 iops : min= 5, max= 33, avg=17.79, stdev= 6.68, samples=42 lat (usec) : 50=1.69%, 100=9.38%, 250=0.78%, 500=0.13% lat (msec) : 2=6.77%, 4=5.73%, 10=9.11%, 20=14.58%, 50=33.20% lat (msec) : 100=16.67%, 250=1.82%, 500=0.13% cpu : usr=0.09%, sys=6.26%, ctx=1270, 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=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=145988: Thu Sep 10 03:27:38 2026 read: IOPS=18, BW=293KiB/s (300kB/s)(6256KiB/21319msec) clat (usec): min=36, max=163296, avg=28350.03, stdev=24963.47 lat (usec): min=36, max=163297, avg=28351.18, stdev=24963.45 clat percentiles (usec): | 1.00th=[ 40], 5.00th=[ 52], 10.00th=[ 56], 20.00th=[ 65], | 30.00th=[ 13698], 40.00th=[ 20841], 50.00th=[ 26608], 60.00th=[ 31851], | 70.00th=[ 38536], 80.00th=[ 46400], 90.00th=[ 58983], 95.00th=[ 71828], | 99.00th=[101188], 99.50th=[139461], 99.90th=[162530], 99.95th=[162530], | 99.99th=[162530] bw ( KiB/s): min= 125, max= 475, per=27.35%, avg=293.49, stdev=99.52, samples=41 iops : min= 7, max= 29, avg=17.61, stdev= 6.26, samples=41 write: IOPS=17, BW=283KiB/s (290kB/s)(6032KiB/21319msec); 0 zone resets clat (usec): min=1322, max=173936, avg=27071.84, stdev=28718.33 lat (usec): min=1325, max=173936, avg=27073.80, stdev=28718.26 clat percentiles (usec): | 1.00th=[ 1434], 5.00th=[ 1631], 10.00th=[ 1795], 20.00th=[ 3752], | 30.00th=[ 5669], 40.00th=[ 9765], 50.00th=[ 16057], 60.00th=[ 25035], | 70.00th=[ 37487], 80.00th=[ 49546], 90.00th=[ 66323], 95.00th=[ 83362], | 99.00th=[122160], 99.50th=[173016], 99.90th=[173016], 99.95th=[173016], | 99.99th=[173016] bw ( KiB/s): min= 127, max= 571, per=24.63%, avg=277.83, stdev=97.24, samples=41 iops : min= 7, max= 35, avg=16.61, stdev= 6.11, samples=41 lat (usec) : 50=1.82%, 100=10.94%, 250=0.65%, 1000=0.13% lat (msec) : 2=6.12%, 4=5.08%, 10=9.24%, 20=11.85%, 50=35.55% lat (msec) : 100=17.32%, 250=1.30% cpu : usr=0.11%, sys=6.76%, ctx=1334, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145989: Thu Sep 10 03:27:38 2026 read: IOPS=18, BW=289KiB/s (296kB/s)(6032KiB/20848msec) clat (usec): min=32, max=122357, avg=27439.73, stdev=24613.16 lat (usec): min=32, max=122358, avg=27440.73, stdev=24613.14 clat percentiles (usec): | 1.00th=[ 37], 5.00th=[ 46], 10.00th=[ 55], 20.00th=[ 65], | 30.00th=[ 11469], 40.00th=[ 20579], 50.00th=[ 25560], 60.00th=[ 32113], | 70.00th=[ 38011], 80.00th=[ 44827], 90.00th=[ 58983], 95.00th=[ 69731], | 99.00th=[117965], 99.50th=[119014], 99.90th=[122160], 99.95th=[122160], | 99.99th=[122160] bw ( KiB/s): min= 95, max= 508, per=26.87%, avg=288.34, stdev=90.47, samples=41 iops : min= 5, max= 31, avg=17.29, stdev= 5.73, samples=41 write: IOPS=18, BW=300KiB/s (307kB/s)(6256KiB/20848msec); 0 zone resets clat (usec): min=1327, max=260971, avg=26726.06, stdev=29817.18 lat (usec): min=1328, max=260972, avg=26737.14, stdev=29816.02 clat percentiles (usec): | 1.00th=[ 1418], 5.00th=[ 1647], 10.00th=[ 1860], 20.00th=[ 3589], | 30.00th=[ 6194], 40.00th=[ 10290], 50.00th=[ 16057], 60.00th=[ 23725], | 70.00th=[ 36439], 80.00th=[ 46400], 90.00th=[ 65274], 95.00th=[ 85459], | 99.00th=[119014], 99.50th=[158335], 99.90th=[261096], 99.95th=[261096], | 99.99th=[261096] bw ( KiB/s): min= 126, max= 506, per=26.57%, avg=299.66, stdev=81.79, samples=41 iops : min= 7, max= 31, avg=18.00, stdev= 5.14, samples=41 lat (usec) : 50=2.86%, 100=10.42%, 250=0.26%, 500=0.13%, 750=0.13% lat (msec) : 2=5.99%, 4=5.86%, 10=9.24%, 20=11.98%, 50=36.72% lat (msec) : 100=14.71%, 250=1.56%, 500=0.13% cpu : usr=0.08%, sys=6.62%, ctx=1290, 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=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=1073KiB/s (1099kB/s), 264KiB/s-293KiB/s (271kB/s-300kB/s), io=23.4MiB (24.5MB), run=20848-22321msec WRITE: bw=1129KiB/s (1156kB/s), 283KiB/s-301KiB/s (290kB/s-308kB/s), io=24.6MiB (25.8MB), run=20848-22321msec fio: pid=145984, err=5/file:backend.c:481, func=full resid, error=Input/output error rand-rw: (groupid=0, jobs=1): err= 0: pid=145981: Thu Sep 10 03:28:16 2026 read: IOPS=6, BW=97.6KiB/s (99.9kB/s)(5920KiB/60666msec) clat (msec): min=6, max=213, avg=32.86, stdev=27.05 lat (msec): min=6, max=213, avg=32.86, stdev=27.05 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 19], 40.00th=[ 22], 50.00th=[ 25], 60.00th=[ 29], | 70.00th=[ 36], 80.00th=[ 46], 90.00th=[ 61], 95.00th=[ 80], | 99.00th=[ 134], 99.50th=[ 207], 99.90th=[ 213], 99.95th=[ 213], | 99.99th=[ 213] bw ( KiB/s): min= 31, max= 319, per=28.96%, avg=106.27, stdev=58.72, samples=108 iops : min= 1, max= 19, avg= 5.88, stdev= 3.69, samples=108 write: IOPS=6, BW=105KiB/s (107kB/s)(6368KiB/60666msec); 0 zone resets clat (msec): min=37, max=317, avg=121.75, stdev=46.51 lat (msec): min=37, max=317, avg=121.76, stdev=46.51 clat percentiles (msec): | 1.00th=[ 45], 5.00th=[ 63], 10.00th=[ 72], 20.00th=[ 82], | 30.00th=[ 93], 40.00th=[ 103], 50.00th=[ 112], 60.00th=[ 125], | 70.00th=[ 138], 80.00th=[ 159], 90.00th=[ 182], 95.00th=[ 211], | 99.00th=[ 271], 99.50th=[ 300], 99.90th=[ 317], 99.95th=[ 317], | 99.99th=[ 317] bw ( KiB/s): min= 30, max= 191, per=26.94%, avg=105.06, stdev=37.11, samples=118 iops : min= 1, max= 11, avg= 5.80, stdev= 2.38, samples=118 lat (msec) : 10=2.99%, 20=14.45%, 50=23.70%, 100=24.09%, 250=33.72% lat (msec) : 500=1.04% cpu : usr=0.03%, sys=1.32%, ctx=1387, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145982: Thu Sep 10 03:28:16 2026 read: IOPS=5, BW=94.2KiB/s (96.4kB/s)(5744KiB/61002msec) clat (msec): min=6, max=237, avg=33.13, stdev=30.72 lat (msec): min=6, max=237, avg=33.13, stdev=30.72 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 14], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 24], 60.00th=[ 28], | 70.00th=[ 34], 80.00th=[ 45], 90.00th=[ 66], 95.00th=[ 103], | 99.00th=[ 155], 99.50th=[ 222], 99.90th=[ 239], 99.95th=[ 239], | 99.99th=[ 239] bw ( KiB/s): min= 22, max= 286, per=28.08%, avg=103.05, stdev=63.43, samples=109 iops : min= 1, max= 17, avg= 5.68, stdev= 4.04, samples=109 write: IOPS=6, BW=107KiB/s (110kB/s)(6544KiB/61002msec); 0 zone resets clat (msec): min=39, max=320, avg=119.69, stdev=45.72 lat (msec): min=39, max=320, avg=119.70, stdev=45.72 clat percentiles (msec): | 1.00th=[ 49], 5.00th=[ 59], 10.00th=[ 68], 20.00th=[ 84], | 30.00th=[ 93], 40.00th=[ 104], 50.00th=[ 114], 60.00th=[ 123], | 70.00th=[ 136], 80.00th=[ 157], 90.00th=[ 182], 95.00th=[ 205], | 99.00th=[ 266], 99.50th=[ 266], 99.90th=[ 321], 99.95th=[ 321], | 99.99th=[ 321] bw ( KiB/s): min= 30, max= 224, per=27.22%, avg=106.15, stdev=39.36, samples=120 iops : min= 1, max= 14, avg= 5.87, stdev= 2.54, samples=120 lat (msec) : 10=2.47%, 20=15.10%, 50=22.79%, 100=23.96%, 250=34.64% lat (msec) : 500=1.04% cpu : usr=0.04%, sys=1.32%, ctx=1401, 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=145983: Thu Sep 10 03:28:16 2026 read: IOPS=6, BW=107KiB/s (110kB/s)(6256KiB/58355msec) clat (msec): min=6, max=217, avg=31.32, stdev=25.08 lat (msec): min=6, max=217, avg=31.32, stdev=25.08 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 9], 10.00th=[ 12], 20.00th=[ 14], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 25], 60.00th=[ 30], | 70.00th=[ 34], 80.00th=[ 44], 90.00th=[ 59], 95.00th=[ 79], | 99.00th=[ 128], 99.50th=[ 153], 99.90th=[ 218], 99.95th=[ 218], | 99.99th=[ 218] bw ( KiB/s): min= 31, max= 414, per=30.32%, avg=111.27, stdev=74.30, samples=111 iops : min= 1, max= 25, avg= 6.20, stdev= 4.71, samples=111 write: IOPS=6, BW=103KiB/s (106kB/s)(6032KiB/58355msec); 0 zone resets clat (msec): min=37, max=329, avg=121.95, stdev=46.90 lat (msec): min=37, max=329, avg=121.96, stdev=46.89 clat percentiles (msec): | 1.00th=[ 47], 5.00th=[ 65], 10.00th=[ 72], 20.00th=[ 84], | 30.00th=[ 94], 40.00th=[ 103], 50.00th=[ 114], 60.00th=[ 124], | 70.00th=[ 136], 80.00th=[ 157], 90.00th=[ 186], 95.00th=[ 218], | 99.00th=[ 275], 99.50th=[ 284], 99.90th=[ 330], 99.95th=[ 330], | 99.99th=[ 330] bw ( KiB/s): min= 31, max= 192, per=26.55%, avg=103.53, stdev=33.33, samples=114 iops : min= 1, max= 12, avg= 5.70, stdev= 2.15, samples=114 lat (msec) : 10=4.17%, 20=16.02%, 50=24.48%, 100=23.44%, 250=31.12% lat (msec) : 500=0.78% cpu : usr=0.04%, sys=1.43%, ctx=1400, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 5 (file:backend.c:481, func=full resid, error=Input/output error): pid=145984: Thu Sep 10 03:28:16 2026 read: IOPS=5, BW=91.4KiB/s (93.6kB/s)(4512KiB/49370msec) clat (msec): min=7, max=234, avg=36.45, stdev=31.22 lat (msec): min=7, max=234, avg=36.45, stdev=31.22 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 13], 20.00th=[ 16], | 30.00th=[ 18], 40.00th=[ 23], 50.00th=[ 27], 60.00th=[ 32], | 70.00th=[ 40], 80.00th=[ 50], 90.00th=[ 74], 95.00th=[ 92], | 99.00th=[ 163], 99.50th=[ 165], 99.90th=[ 234], 99.95th=[ 234], | 99.99th=[ 234] bw ( KiB/s): min= 31, max= 319, per=26.42%, avg=96.96, stdev=67.81, samples=91 iops : min= 1, max= 19, avg= 5.26, stdev= 4.26, samples=91 write: IOPS=6, BW=98.8KiB/s (101kB/s)(4880KiB/49370msec); 0 zone resets clat (msec): min=52, max=393, avg=127.60, stdev=49.29 lat (msec): min=52, max=393, avg=127.61, stdev=49.28 clat percentiles (msec): | 1.00th=[ 57], 5.00th=[ 67], 10.00th=[ 75], 20.00th=[ 86], | 30.00th=[ 97], 40.00th=[ 106], 50.00th=[ 120], 60.00th=[ 132], | 70.00th=[ 146], 80.00th=[ 165], 90.00th=[ 188], 95.00th=[ 213], | 99.00th=[ 279], 99.50th=[ 351], 99.90th=[ 393], 99.95th=[ 393], | 99.99th=[ 393] bw ( KiB/s): min= 31, max= 223, per=25.77%, avg=100.51, stdev=36.65, samples=95 iops : min= 1, max= 13, avg= 5.48, stdev= 2.35, samples=95 lat (msec) : 10=3.06%, 20=13.78%, 50=21.60%, 100=24.66%, 250=35.71% lat (msec) : 500=1.02% cpu : usr=0.03%, sys=1.22%, ctx=961, majf=0, minf=20 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=283,305,0,0 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=368KiB/s (377kB/s), 91.4KiB/s-107KiB/s (93.6kB/s-110kB/s), io=21.9MiB (22.0MB), run=49370-61002msec WRITE: bw=391KiB/s (400kB/s), 98.8KiB/s-107KiB/s (101kB/s-110kB/s), io=23.3MiB (24.4MB), run=49370-61002msec 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=146012: Thu Sep 10 03:28:31 2026 read: IOPS=1, BW=1410KiB/s (1443kB/s)(7168KiB/5085msec) clat (msec): min=41, max=355, avg=230.73, stdev=108.72 lat (msec): min=41, max=355, avg=230.73, stdev=108.72 clat percentiles (msec): | 1.00th=[ 42], 5.00th=[ 42], 10.00th=[ 42], 20.00th=[ 150], | 30.00th=[ 207], 40.00th=[ 207], 50.00th=[ 251], 60.00th=[ 292], | 70.00th=[ 292], 80.00th=[ 321], 90.00th=[ 355], 95.00th=[ 355], | 99.00th=[ 355], 99.50th=[ 355], 99.90th=[ 355], 99.95th=[ 355], | 99.99th=[ 355] bw ( KiB/s): min= 2015, max= 3976, per=72.00%, avg=2745.25, stdev=929.00, samples=4 iops : min= 1, max= 3, avg= 1.75, stdev= 0.96, samples=4 write: IOPS=0, BW=1007KiB/s (1031kB/s)(5120KiB/5085msec); 0 zone resets clat (msec): min=100, max=2388, avg=637.44, stdev=980.72 lat (msec): min=101, max=2388, avg=637.53, stdev=980.70 clat percentiles (msec): | 1.00th=[ 102], 5.00th=[ 102], 10.00th=[ 102], 20.00th=[ 102], | 30.00th=[ 205], 40.00th=[ 205], 50.00th=[ 218], 60.00th=[ 218], | 70.00th=[ 275], 80.00th=[ 275], 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= 2015, max= 5818, per=73.37%, avg=3916.50, stdev=2689.13, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 lat (msec) : 50=8.33%, 250=41.67%, 500=41.67%, >=2000=8.33% cpu : usr=0.00%, sys=11.45%, ctx=225, 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=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=146014: Thu Sep 10 03:28:31 2026 read: IOPS=0, BW=417KiB/s (427kB/s)(2048KiB/4914msec) clat (usec): min=495, max=177489, avg=88992.70, stdev=125153.46 lat (usec): min=496, max=177492, avg=88994.67, stdev=125155.18 clat percentiles (usec): | 1.00th=[ 498], 5.00th=[ 498], 10.00th=[ 498], 20.00th=[ 498], | 30.00th=[ 498], 40.00th=[ 498], 50.00th=[ 498], 60.00th=[177210], | 70.00th=[177210], 80.00th=[177210], 90.00th=[177210], 95.00th=[177210], | 99.00th=[177210], 99.50th=[177210], 99.90th=[177210], 99.95th=[177210], | 99.99th=[177210] bw ( KiB/s): min= 1957, max= 1976, per=51.57%, avg=1966.50, stdev=13.44, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=2, BW=2084KiB/s (2134kB/s)(10.0MiB/4914msec); 0 zone resets clat (msec): min=109, max=1992, avg=468.31, stdev=567.74 lat (msec): min=109, max=1992, avg=468.40, stdev=567.73 clat percentiles (msec): | 1.00th=[ 110], 5.00th=[ 110], 10.00th=[ 110], 20.00th=[ 127], | 30.00th=[ 138], 40.00th=[ 165], 50.00th=[ 236], 60.00th=[ 342], | 70.00th=[ 342], 80.00th=[ 592], 90.00th=[ 642], 95.00th=[ 1989], | 99.00th=[ 1989], 99.50th=[ 1989], 99.90th=[ 1989], 99.95th=[ 1989], | 99.99th=[ 1989] bw ( KiB/s): min= 1965, max= 6119, per=67.49%, avg=3602.80, stdev=1716.83, samples=5 iops : min= 1, max= 5, avg= 2.60, stdev= 1.67, samples=5 lat (usec) : 500=8.33% lat (msec) : 250=50.00%, 500=16.67%, 750=16.67%, 2000=8.33% cpu : usr=0.04%, sys=13.70%, ctx=122, 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=146016: Thu Sep 10 03:28:31 2026 read: IOPS=1, BW=1144KiB/s (1171kB/s)(6144KiB/5371msec) clat (usec): min=475, max=2890.6k, avg=590724.98, stdev=1138413.74 lat (usec): min=476, max=2890.6k, avg=590726.33, stdev=1138413.64 clat percentiles (usec): | 1.00th=[ 478], 5.00th=[ 478], 10.00th=[ 478], | 20.00th=[ 486], 30.00th=[ 486], 40.00th=[ 627], | 50.00th=[ 627], 60.00th=[ 274727], 70.00th=[ 375391], | 80.00th=[ 375391], 90.00th=[2902459], 95.00th=[2902459], | 99.00th=[2902459], 99.50th=[2902459], 99.90th=[2902459], | 99.95th=[2902459], 99.99th=[2902459] bw ( KiB/s): min= 2035, max= 4055, per=88.00%, avg=3355.33, stdev=1144.12, samples=3 iops : min= 1, max= 3, avg= 2.33, stdev= 1.15, samples=3 write: IOPS=1, BW=1144KiB/s (1171kB/s)(6144KiB/5371msec); 0 zone resets clat (msec): min=129, max=472, avg=285.02, stdev=152.34 lat (msec): min=129, max=472, avg=285.15, stdev=152.43 clat percentiles (msec): | 1.00th=[ 130], 5.00th=[ 130], 10.00th=[ 130], 20.00th=[ 146], | 30.00th=[ 146], 40.00th=[ 176], 50.00th=[ 176], 60.00th=[ 359], | 70.00th=[ 430], 80.00th=[ 430], 90.00th=[ 472], 95.00th=[ 472], | 99.00th=[ 472], 99.50th=[ 472], 99.90th=[ 472], 99.95th=[ 472], | 99.99th=[ 472] bw ( KiB/s): min= 1988, max= 2727, per=41.01%, avg=2189.25, stdev=358.87, samples=4 iops : min= 1, max= 2, avg= 1.25, stdev= 0.50, samples=4 lat (usec) : 500=16.67%, 750=8.33% lat (msec) : 250=25.00%, 500=41.67%, >=2000=8.33% cpu : usr=0.00%, sys=11.10%, ctx=596, 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=146018: Thu Sep 10 03:28:31 2026 read: IOPS=1, BW=1941KiB/s (1987kB/s)(5120KiB/2638msec) clat (usec): min=569, max=368704, avg=122388.83, stdev=172211.08 lat (usec): min=571, max=368705, avg=122390.17, stdev=172211.18 clat percentiles (usec): | 1.00th=[ 570], 5.00th=[ 570], 10.00th=[ 570], 20.00th=[ 570], | 30.00th=[ 594], 40.00th=[ 594], 50.00th=[ 2147], 60.00th=[ 2147], | 70.00th=[240124], 80.00th=[240124], 90.00th=[367002], 95.00th=[367002], | 99.00th=[367002], 99.50th=[367002], 99.90th=[367002], 99.95th=[367002], | 99.99th=[367002] bw ( KiB/s): min= 7953, max= 7953, per=100.00%, avg=7953.00, stdev= 0.00, samples=1 iops : min= 7, max= 7, avg= 7.00, stdev= 0.00, samples=1 write: IOPS=2, BW=2717KiB/s (2782kB/s)(7168KiB/2638msec); 0 zone resets clat (msec): min=131, max=407, avg=277.82, stdev=95.81 lat (msec): min=131, max=407, avg=277.90, stdev=95.80 clat percentiles (msec): | 1.00th=[ 132], 5.00th=[ 132], 10.00th=[ 132], 20.00th=[ 226], | 30.00th=[ 230], 40.00th=[ 230], 50.00th=[ 253], 60.00th=[ 330], | 70.00th=[ 330], 80.00th=[ 372], 90.00th=[ 409], 95.00th=[ 409], | 99.00th=[ 409], 99.50th=[ 409], 99.90th=[ 409], 99.95th=[ 409], | 99.99th=[ 409] bw ( KiB/s): min= 1477, max= 6047, per=59.09%, avg=3154.33, stdev=2515.75, samples=3 iops : min= 1, max= 5, avg= 2.33, stdev= 2.31, samples=3 lat (usec) : 750=16.67% lat (msec) : 4=8.33%, 250=33.33%, 500=41.67% cpu : usr=0.08%, sys=23.44%, ctx=144, 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=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=3813KiB/s (3905kB/s), 417KiB/s-1941KiB/s (427kB/s-1987kB/s), io=20.0MiB (20.0MB), run=2638-5371msec WRITE: bw=5338KiB/s (5466kB/s), 1007KiB/s-2717KiB/s (1031kB/s-2782kB/s), io=28.0MiB (29.4MB), run=2638-5371msec rand-rw: (groupid=0, jobs=1): err= 0: pid=146013: Thu Sep 10 03:28:32 2026 read: IOPS=1, BW=1071KiB/s (1097kB/s)(7168KiB/6690msec) clat (msec): min=100, max=753, avg=385.44, stdev=328.73 lat (msec): min=100, max=753, avg=385.45, stdev=328.73 clat percentiles (msec): | 1.00th=[ 102], 5.00th=[ 102], 10.00th=[ 102], 20.00th=[ 103], | 30.00th=[ 127], 40.00th=[ 127], 50.00th=[ 161], 60.00th=[ 726], | 70.00th=[ 726], 80.00th=[ 726], 90.00th=[ 751], 95.00th=[ 751], | 99.00th=[ 751], 99.50th=[ 751], 99.90th=[ 751], 99.95th=[ 751], | 99.99th=[ 751] bw ( KiB/s): min= 1957, max= 4096, per=83.63%, avg=2514.00, stdev=1054.93, samples=4 iops : min= 1, max= 4, avg= 1.75, stdev= 1.50, samples=4 write: IOPS=0, BW=765KiB/s (784kB/s)(5120KiB/6690msec); 0 zone resets clat (msec): min=168, max=2789, avg=752.83, stdev=1139.93 lat (msec): min=169, max=2789, avg=753.18, stdev=1139.76 clat percentiles (msec): | 1.00th=[ 169], 5.00th=[ 169], 10.00th=[ 169], 20.00th=[ 169], | 30.00th=[ 224], 40.00th=[ 224], 50.00th=[ 288], 60.00th=[ 288], | 70.00th=[ 296], 80.00th=[ 296], 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= 2023, max= 6023, per=95.58%, avg=4023.00, stdev=2828.43, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 lat (msec) : 250=50.00%, 500=16.67%, 750=16.67%, 1000=8.33%, >=2000=8.33% cpu : usr=0.01%, sys=2.20%, ctx=80, 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=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=146015: Thu Sep 10 03:28:32 2026 read: IOPS=0, BW=301KiB/s (308kB/s)(2048KiB/6811msec) clat (msec): min=121, max=253, avg=187.51, stdev=93.62 lat (msec): min=121, max=253, avg=187.51, stdev=93.62 clat percentiles (msec): | 1.00th=[ 122], 5.00th=[ 122], 10.00th=[ 122], 20.00th=[ 122], | 30.00th=[ 122], 40.00th=[ 122], 50.00th=[ 122], 60.00th=[ 253], | 70.00th=[ 253], 80.00th=[ 253], 90.00th=[ 253], 95.00th=[ 253], | 99.00th=[ 253], 99.50th=[ 253], 99.90th=[ 253], 99.95th=[ 253], | 99.99th=[ 253] bw ( KiB/s): min= 1383, max= 2048, per=57.07%, avg=1715.50, stdev=470.23, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 write: IOPS=1, BW=1503KiB/s (1540kB/s)(10.0MiB/6811msec); 0 zone resets clat (msec): min=142, max=2891, avg=633.93, stdev=820.69 lat (msec): min=142, max=2891, avg=634.30, stdev=820.58 clat percentiles (msec): | 1.00th=[ 142], 5.00th=[ 142], 10.00th=[ 142], 20.00th=[ 163], | 30.00th=[ 205], 40.00th=[ 264], 50.00th=[ 380], 60.00th=[ 430], | 70.00th=[ 447], 80.00th=[ 600], 90.00th=[ 818], 95.00th=[ 2903], | 99.00th=[ 2903], 99.50th=[ 2903], 99.90th=[ 2903], 99.95th=[ 2903], | 99.99th=[ 2903] bw ( KiB/s): min= 1988, max= 4096, per=56.10%, avg=2361.33, stdev=849.98, samples=6 iops : min= 1, max= 4, avg= 1.50, stdev= 1.22, samples=6 lat (msec) : 250=33.33%, 500=41.67%, 750=8.33%, 1000=8.33%, >=2000=8.33% cpu : usr=0.03%, sys=4.01%, ctx=111, 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=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=146017: Thu Sep 10 03:28:32 2026 read: IOPS=0, BW=989KiB/s (1012kB/s)(6144KiB/6214msec) clat (msec): min=75, max=2595, avg=550.69, stdev=1003.65 lat (msec): min=75, max=2595, avg=550.69, stdev=1003.65 clat percentiles (msec): | 1.00th=[ 75], 5.00th=[ 75], 10.00th=[ 75], 20.00th=[ 104], | 30.00th=[ 104], 40.00th=[ 136], 50.00th=[ 136], 60.00th=[ 142], | 70.00th=[ 253], 80.00th=[ 253], 90.00th=[ 2601], 95.00th=[ 2601], | 99.00th=[ 2601], 99.50th=[ 2601], 99.90th=[ 2601], 99.95th=[ 2601], | 99.99th=[ 2601] bw ( KiB/s): min= 1957, max= 4096, per=89.73%, avg=2697.33, stdev=1211.97, samples=3 iops : min= 1, max= 4, avg= 2.00, stdev= 1.73, samples=3 write: IOPS=0, BW=989KiB/s (1012kB/s)(6144KiB/6214msec); 0 zone resets clat (msec): min=245, max=833, avg=445.40, stdev=235.16 lat (msec): min=245, max=833, avg=445.50, stdev=235.15 clat percentiles (msec): | 1.00th=[ 247], 5.00th=[ 247], 10.00th=[ 247], 20.00th=[ 259], | 30.00th=[ 259], 40.00th=[ 279], 50.00th=[ 279], 60.00th=[ 456], | 70.00th=[ 600], 80.00th=[ 600], 90.00th=[ 835], 95.00th=[ 835], | 99.00th=[ 835], 99.50th=[ 835], 99.90th=[ 835], 99.95th=[ 835], | 99.99th=[ 835] bw ( KiB/s): min= 2035, max= 4031, per=60.31%, avg=2538.25, stdev=995.18, samples=4 iops : min= 1, max= 3, avg= 1.75, stdev= 0.96, samples=4 lat (msec) : 100=8.33%, 250=33.33%, 500=33.33%, 750=8.33%, 1000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=3.28%, ctx=92, 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=146019: Thu Sep 10 03:28:32 2026 read: IOPS=0, BW=799KiB/s (818kB/s)(5120KiB/6409msec) clat (msec): min=72, max=237, avg=152.48, stdev=72.53 lat (msec): min=72, max=237, avg=152.49, stdev=72.53 clat percentiles (msec): | 1.00th=[ 72], 5.00th=[ 72], 10.00th=[ 72], 20.00th=[ 72], | 30.00th=[ 95], 40.00th=[ 95], 50.00th=[ 144], 60.00th=[ 144], | 70.00th=[ 215], 80.00th=[ 215], 90.00th=[ 239], 95.00th=[ 239], | 99.00th=[ 239], 99.50th=[ 239], 99.90th=[ 239], 99.95th=[ 239], | 99.99th=[ 239] bw ( KiB/s): min= 2007, max= 4096, per=90.11%, avg=2708.67, stdev=1201.49, samples=3 iops : min= 1, max= 4, avg= 2.00, stdev= 1.73, samples=3 write: IOPS=1, BW=1118KiB/s (1145kB/s)(7168KiB/6409msec); 0 zone resets clat (msec): min=156, max=3189, avg=775.02, stdev=1084.06 lat (msec): min=156, max=3189, avg=775.29, stdev=1084.06 clat percentiles (msec): | 1.00th=[ 157], 5.00th=[ 157], 10.00th=[ 157], 20.00th=[ 182], | 30.00th=[ 218], 40.00th=[ 218], 50.00th=[ 409], 60.00th=[ 609], | 70.00th=[ 609], 80.00th=[ 667], 90.00th=[ 3205], 95.00th=[ 3205], | 99.00th=[ 3205], 99.50th=[ 3205], 99.90th=[ 3205], 99.95th=[ 3205], | 99.99th=[ 3205] bw ( KiB/s): min= 1988, max= 4015, per=57.42%, avg=2416.80, stdev=893.64, samples=5 iops : min= 1, max= 3, avg= 1.40, stdev= 0.89, samples=5 lat (msec) : 100=16.67%, 250=50.00%, 500=8.33%, 750=16.67%, >=2000=8.33% cpu : usr=0.00%, sys=3.96%, ctx=94, 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=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=3007KiB/s (3079kB/s), 301KiB/s-1071KiB/s (308kB/s-1097kB/s), io=20.0MiB (20.0MB), run=6214-6811msec WRITE: bw=4210KiB/s (4311kB/s), 765KiB/s-1503KiB/s (784kB/s-1540kB/s), io=28.0MiB (29.4MB), run=6214-6811msec 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=146027: Thu Sep 10 03:28:48 2026 read: IOPS=0, BW=3691KiB/s (3780kB/s)(12.0MiB/3329msec) clat (msec): min=649, max=1697, avg=1080.10, stdev=548.51 lat (msec): min=649, max=1697, avg=1080.10, stdev=548.51 clat percentiles (msec): | 1.00th=[ 651], 5.00th=[ 651], 10.00th=[ 651], 20.00th=[ 651], | 30.00th=[ 651], 40.00th=[ 894], 50.00th=[ 894], 60.00th=[ 894], | 70.00th=[ 1703], 80.00th=[ 1703], 90.00th=[ 1703], 95.00th=[ 1703], | 99.00th=[ 1703], 99.50th=[ 1703], 99.90th=[ 1703], 99.95th=[ 1703], | 99.99th=[ 1703] bw ( KiB/s): min= 7984, max= 8175, per=100.00%, avg=8079.50, stdev=135.06, 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=2.70%, ctx=54, majf=0, minf=9 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=146028: Thu Sep 10 03:28:48 2026 read: IOPS=0, BW=823KiB/s (843kB/s)(4096KiB/4974msec) clat (nsec): min=1409.6M, max=1409.6M, avg=1409562124.00, stdev= 0.00 lat (nsec): min=1409.6M, max=1409.6M, avg=1409564212.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1418], 5.00th=[ 1418], 10.00th=[ 1418], 20.00th=[ 1418], | 30.00th=[ 1418], 40.00th=[ 1418], 50.00th=[ 1418], 60.00th=[ 1418], | 70.00th=[ 1418], 80.00th=[ 1418], 90.00th=[ 1418], 95.00th=[ 1418], | 99.00th=[ 1418], 99.50th=[ 1418], 99.90th=[ 1418], 99.95th=[ 1418], | 99.99th=[ 1418] bw ( KiB/s): min= 8126, max= 8126, per=100.00%, avg=8126.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=1647KiB/s (1686kB/s)(8192KiB/4974msec); 0 zone resets clat (msec): min=452, max=2982, avg=1717.48, stdev=1788.46 lat (msec): min=453, max=2982, avg=1717.77, stdev=1788.46 clat percentiles (msec): | 1.00th=[ 451], 5.00th=[ 451], 10.00th=[ 451], 20.00th=[ 451], | 30.00th=[ 451], 40.00th=[ 451], 50.00th=[ 451], 60.00th=[ 2970], | 70.00th=[ 2970], 80.00th=[ 2970], 90.00th=[ 2970], 95.00th=[ 2970], | 99.00th=[ 2970], 99.50th=[ 2970], 99.90th=[ 2970], 99.95th=[ 2970], | 99.99th=[ 2970] bw ( KiB/s): min= 8175, max= 8175, per=100.00%, avg=8175.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=1.89%, ctx=50, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1,2,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=146030: Thu Sep 10 03:28:48 2026 write: IOPS=1, BW=6693KiB/s (6853kB/s)(12.0MiB/1836msec); 0 zone resets clat (msec): min=481, max=713, avg=566.22, stdev=128.01 lat (msec): min=482, max=713, avg=566.64, stdev=128.02 clat percentiles (msec): | 1.00th=[ 481], 5.00th=[ 481], 10.00th=[ 481], 20.00th=[ 481], | 30.00th=[ 481], 40.00th=[ 502], 50.00th=[ 502], 60.00th=[ 502], | 70.00th=[ 718], 80.00th=[ 718], 90.00th=[ 718], 95.00th=[ 718], | 99.00th=[ 718], 99.50th=[ 718], 99.90th=[ 718], 99.95th=[ 718], | 99.99th=[ 718] bw ( KiB/s): min= 8126, max= 8159, per=100.00%, avg=8142.50, stdev=23.33, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 750=66.67% cpu : usr=0.11%, sys=8.56%, ctx=50, majf=0, minf=9 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=146033: Thu Sep 10 03:28:48 2026 write: IOPS=0, BW=3947KiB/s (4042kB/s)(12.0MiB/3113msec); 0 zone resets clat (msec): min=373, max=1634, avg=1000.01, stdev=630.55 lat (msec): min=374, max=1635, avg=1000.41, stdev=630.53 clat percentiles (msec): | 1.00th=[ 376], 5.00th=[ 376], 10.00th=[ 376], 20.00th=[ 376], | 30.00th=[ 376], 40.00th=[ 995], 50.00th=[ 995], 60.00th=[ 995], | 70.00th=[ 1636], 80.00th=[ 1636], 90.00th=[ 1636], 95.00th=[ 1636], | 99.00th=[ 1636], 99.50th=[ 1636], 99.90th=[ 1636], 99.95th=[ 1636], | 99.99th=[ 1636] bw ( KiB/s): min= 6187, max= 8126, per=100.00%, avg=7156.50, stdev=1371.08, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=3.28%, ctx=49, majf=0, minf=10 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=3294KiB/s (3373kB/s), 823KiB/s-3691KiB/s (843kB/s-3780kB/s), io=16.0MiB (16.8MB), run=3329-4974msec WRITE: bw=6588KiB/s (6746kB/s), 1647KiB/s-6693KiB/s (1686kB/s-6853kB/s), io=32.0MiB (33.6MB), run=1836-4974msec rand-rw: (groupid=0, jobs=1): err= 0: pid=146029: Thu Sep 10 03:28:48 2026 read: IOPS=0, BW=3842KiB/s (3935kB/s)(12.0MiB/3198msec) clat (msec): min=748, max=1218, avg=1018.29, stdev=242.68 lat (msec): min=748, max=1218, avg=1018.29, stdev=242.68 clat percentiles (msec): | 1.00th=[ 751], 5.00th=[ 751], 10.00th=[ 751], 20.00th=[ 751], | 30.00th=[ 751], 40.00th=[ 1083], 50.00th=[ 1083], 60.00th=[ 1083], | 70.00th=[ 1217], 80.00th=[ 1217], 90.00th=[ 1217], 95.00th=[ 1217], | 99.00th=[ 1217], 99.50th=[ 1217], 99.90th=[ 1217], 99.95th=[ 1217], | 99.99th=[ 1217] bw ( KiB/s): min= 7937, max= 8094, per=100.00%, avg=8015.50, stdev=111.02, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=33.33%, 2000=66.67% cpu : usr=0.00%, sys=11.10%, ctx=218, 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=146031: Thu Sep 10 03:28:48 2026 read: IOPS=0, BW=999KiB/s (1023kB/s)(4096KiB/4100msec) clat (nsec): min=979725k, max=979725k, avg=979724795.00, stdev= 0.00 lat (nsec): min=979727k, max=979727k, avg=979726976.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 978], 5.00th=[ 978], 10.00th=[ 978], 20.00th=[ 978], | 30.00th=[ 978], 40.00th=[ 978], 50.00th=[ 978], 60.00th=[ 978], | 70.00th=[ 978], 80.00th=[ 978], 90.00th=[ 978], 95.00th=[ 978], | 99.00th=[ 978], 99.50th=[ 978], 99.90th=[ 978], 99.95th=[ 978], | 99.99th=[ 978] bw ( KiB/s): min= 7907, max= 7907, per=100.00%, avg=7907.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=1998KiB/s (2046kB/s)(8192KiB/4100msec); 0 zone resets clat (msec): min=1259, max=1740, avg=1500.37, stdev=339.95 lat (msec): min=1260, max=1741, avg=1500.68, stdev=339.89 clat percentiles (msec): | 1.00th=[ 1267], 5.00th=[ 1267], 10.00th=[ 1267], 20.00th=[ 1267], | 30.00th=[ 1267], 40.00th=[ 1267], 50.00th=[ 1267], 60.00th=[ 1737], | 70.00th=[ 1737], 80.00th=[ 1737], 90.00th=[ 1737], 95.00th=[ 1737], | 99.00th=[ 1737], 99.50th=[ 1737], 99.90th=[ 1737], 99.95th=[ 1737], | 99.99th=[ 1737] bw ( KiB/s): min= 8110, max= 8110, per=100.00%, avg=8110.00, 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=3.68%, ctx=184, 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=146032: Thu Sep 10 03:28:48 2026 write: IOPS=0, BW=2578KiB/s (2640kB/s)(12.0MiB/4767msec); 0 zone resets clat (msec): min=1127, max=2124, avg=1501.73, stdev=543.20 lat (msec): min=1127, max=2126, avg=1502.44, stdev=543.95 clat percentiles (msec): | 1.00th=[ 1133], 5.00th=[ 1133], 10.00th=[ 1133], 20.00th=[ 1133], | 30.00th=[ 1133], 40.00th=[ 1250], 50.00th=[ 1250], 60.00th=[ 1250], | 70.00th=[ 2123], 80.00th=[ 2123], 90.00th=[ 2123], 95.00th=[ 2123], | 99.00th=[ 2123], 99.50th=[ 2123], 99.90th=[ 2123], 99.95th=[ 2123], | 99.99th=[ 2123] bw ( KiB/s): min= 8094, max= 8192, per=100.00%, avg=8143.00, stdev=69.30, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 2000=66.67%, >=2000=33.33% cpu : usr=0.00%, sys=2.66%, ctx=47, 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=146034: Thu Sep 10 03:28:48 2026 write: IOPS=0, BW=3490KiB/s (3574kB/s)(12.0MiB/3521msec); 0 zone resets clat (msec): min=340, max=2196, avg=1118.25, stdev=963.96 lat (msec): min=340, max=2197, avg=1121.27, stdev=962.80 clat percentiles (msec): | 1.00th=[ 342], 5.00th=[ 342], 10.00th=[ 342], 20.00th=[ 342], | 30.00th=[ 342], 40.00th=[ 818], 50.00th=[ 818], 60.00th=[ 818], | 70.00th=[ 2198], 80.00th=[ 2198], 90.00th=[ 2198], 95.00th=[ 2198], | 99.00th=[ 2198], 99.50th=[ 2198], 99.90th=[ 2198], 99.95th=[ 2198], | 99.99th=[ 2198] bw ( KiB/s): min= 8078, max= 8078, per=100.00%, avg=8078.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 1000=33.33%, >=2000=33.33% cpu : usr=0.03%, sys=3.27%, ctx=75, 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=3996KiB/s (4092kB/s), 999KiB/s-3842KiB/s (1023kB/s-3935kB/s), io=16.0MiB (16.8MB), run=3198-4100msec WRITE: bw=6874KiB/s (7039kB/s), 1998KiB/s-3490KiB/s (2046kB/s-3574kB/s), io=32.0MiB (33.6MB), run=3521-4767msec