== sanity test 398b: DIO and buffer IO race ============== 19:30:59 (1768264259) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 6.94408 s, 7.2 MB/s mix direct rw 4096 by fio with 4 jobs... mix buffer rw 4096 by fio with 4 jobs... rand-rw: (g=0): rw=randrw, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=psync, iodepth=16 ... fio-3.19 Starting 4 processes rand-rw: (g=0): rw=randrw, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=psync, iodepth=16 ... fio-3.19 Starting 4 processes rand-rw: (groupid=0, jobs=1): err= 0: pid=182044: Mon Jan 12 19:33:38 2026 read: IOPS=11, BW=45.7KiB/s (46.8kB/s)(5992KiB/131060msec) clat (usec): min=109, max=1206.9k, avg=49719.24, stdev=42356.42 lat (usec): min=109, max=1206.9k, avg=49725.91, stdev=42354.55 clat percentiles (usec): | 1.00th=[ 188], 5.00th=[ 14091], 10.00th=[ 19530], | 20.00th=[ 25035], 30.00th=[ 31065], 40.00th=[ 36439], | 50.00th=[ 42206], 60.00th=[ 48497], 70.00th=[ 58459], | 80.00th=[ 68682], 90.00th=[ 89654], 95.00th=[ 106431], | 99.00th=[ 149947], 99.50th=[ 166724], 99.90th=[ 244319], | 99.95th=[1199571], 99.99th=[1199571] bw ( KiB/s): min= 7, max= 103, per=25.88%, avg=45.81, stdev=18.06, samples=255 iops : min= 1, max= 25, avg=10.80, stdev= 4.55, samples=255 write: IOPS=12, BW=48.0KiB/s (49.2kB/s)(6296KiB/131060msec); 0 zone resets clat (usec): min=904, max=317226, avg=35473.92, stdev=36707.43 lat (usec): min=905, max=317228, avg=35483.11, stdev=36710.95 clat percentiles (usec): | 1.00th=[ 1106], 5.00th=[ 1221], 10.00th=[ 1352], 20.00th=[ 3556], | 30.00th=[ 8356], 40.00th=[ 17171], 50.00th=[ 25035], 60.00th=[ 33817], | 70.00th=[ 45876], 80.00th=[ 61080], 90.00th=[ 87557], 95.00th=[107480], | 99.00th=[149947], 99.50th=[183501], 99.90th=[254804], 99.95th=[316670], | 99.99th=[316670] bw ( KiB/s): min= 7, max= 118, per=25.86%, avg=48.09, stdev=21.46, samples=255 iops : min= 1, max= 29, avg=11.38, stdev= 5.41, samples=255 lat (usec) : 250=0.85%, 500=0.13%, 750=0.10%, 1000=0.10% lat (msec) : 2=7.45%, 4=3.52%, 10=5.79%, 20=9.51%, 50=39.88% lat (msec) : 100=26.01%, 250=6.58%, 500=0.07%, 2000=0.03% cpu : usr=0.08%, sys=4.44%, ctx=6318, 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=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=182045: Mon Jan 12 19:33:38 2026 read: IOPS=11, BW=44.3KiB/s (45.4kB/s)(5940KiB/134084msec) clat (usec): min=122, max=232604, avg=50153.91, stdev=30002.43 lat (usec): min=123, max=232605, avg=50159.06, stdev=30004.65 clat percentiles (usec): | 1.00th=[ 180], 5.00th=[ 15270], 10.00th=[ 20055], 20.00th=[ 26346], | 30.00th=[ 32113], 40.00th=[ 38011], 50.00th=[ 43779], 60.00th=[ 50594], | 70.00th=[ 59507], 80.00th=[ 70779], 90.00th=[ 89654], 95.00th=[103285], | 99.00th=[152044], 99.50th=[173016], 99.90th=[231736], 99.95th=[231736], | 99.99th=[231736] bw ( KiB/s): min= 6, max= 95, per=25.24%, avg=44.67, stdev=17.93, samples=259 iops : min= 1, max= 23, avg=10.51, stdev= 4.50, samples=259 write: IOPS=11, BW=47.3KiB/s (48.5kB/s)(6348KiB/134084msec); 0 zone resets clat (usec): min=760, max=1165.2k, avg=37216.49, stdev=46471.05 lat (usec): min=762, max=1165.2k, avg=37220.40, stdev=46470.50 clat percentiles (usec): | 1.00th=[ 1106], 5.00th=[ 1221], 10.00th=[ 1418], | 20.00th=[ 4080], 30.00th=[ 8455], 40.00th=[ 17695], | 50.00th=[ 26608], 60.00th=[ 35390], 70.00th=[ 46924], | 80.00th=[ 64226], 90.00th=[ 90702], 95.00th=[ 110625], | 99.00th=[ 152044], 99.50th=[ 179307], 99.90th=[ 242222], | 99.95th=[1166017], 99.99th=[1166017] bw ( KiB/s): min= 7, max= 118, per=25.37%, avg=47.19, stdev=20.07, samples=262 iops : min= 1, max= 29, avg=11.14, stdev= 5.07, samples=262 lat (usec) : 250=0.88%, 500=0.10%, 750=0.03%, 1000=0.23% lat (msec) : 2=7.03%, 4=3.16%, 10=6.48%, 20=8.59%, 50=39.19% lat (msec) : 100=27.47%, 250=6.80%, 2000=0.03% cpu : usr=0.07%, sys=4.44%, ctx=6365, 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=182046: Mon Jan 12 19:33:38 2026 read: IOPS=11, BW=46.4KiB/s (47.5kB/s)(6028KiB/129816msec) clat (usec): min=112, max=297481, avg=48847.71, stdev=31586.29 lat (usec): min=113, max=297483, avg=48864.08, stdev=31593.85 clat percentiles (usec): | 1.00th=[ 167], 5.00th=[ 13435], 10.00th=[ 18744], 20.00th=[ 25035], | 30.00th=[ 31065], 40.00th=[ 35914], 50.00th=[ 42206], 60.00th=[ 49546], | 70.00th=[ 58459], 80.00th=[ 69731], 90.00th=[ 85459], 95.00th=[106431], | 99.00th=[160433], 99.50th=[187696], 99.90th=[250610], 99.95th=[295699], | 99.99th=[295699] bw ( KiB/s): min= 7, max= 112, per=26.27%, avg=46.50, stdev=17.13, samples=252 iops : min= 1, max= 28, avg=10.96, stdev= 4.33, samples=252 write: IOPS=12, BW=48.2KiB/s (49.4kB/s)(6260KiB/129816msec); 0 zone resets clat (usec): min=816, max=1280.5k, avg=35534.33, stdev=47895.52 lat (usec): min=817, max=1280.5k, avg=35538.09, stdev=47896.14 clat percentiles (usec): | 1.00th=[ 1090], 5.00th=[ 1237], 10.00th=[ 1352], | 20.00th=[ 3458], 30.00th=[ 7832], 40.00th=[ 16188], | 50.00th=[ 24773], 60.00th=[ 34866], 70.00th=[ 44827], | 80.00th=[ 57934], 90.00th=[ 84411], 95.00th=[ 106431], | 99.00th=[ 152044], 99.50th=[ 193987], 99.90th=[ 252707], | 99.95th=[1283458], 99.99th=[1283458] bw ( KiB/s): min= 7, max= 134, per=26.07%, avg=48.49, stdev=22.99, samples=250 iops : min= 1, max= 33, avg=11.48, stdev= 5.80, samples=250 lat (usec) : 250=1.17%, 500=0.13%, 750=0.10%, 1000=0.26% lat (msec) : 2=7.55%, 4=3.42%, 10=6.64%, 20=9.11%, 50=39.26% lat (msec) : 100=26.50%, 250=5.73%, 500=0.10%, 2000=0.03% cpu : usr=0.08%, sys=4.55%, ctx=6318, 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=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=182049: Mon Jan 12 19:33:38 2026 read: IOPS=11, BW=44.8KiB/s (45.9kB/s)(6052KiB/135116msec) clat (usec): min=123, max=252943, avg=48918.54, stdev=32616.26 lat (usec): min=124, max=252946, avg=48925.00, stdev=32613.45 clat percentiles (usec): | 1.00th=[ 153], 5.00th=[ 11994], 10.00th=[ 17695], 20.00th=[ 25297], | 30.00th=[ 30540], 40.00th=[ 36439], 50.00th=[ 42730], 60.00th=[ 49021], | 70.00th=[ 57410], 80.00th=[ 67634], 90.00th=[ 86508], 95.00th=[106431], | 99.00th=[173016], 99.50th=[206570], 99.90th=[250610], 99.95th=[252707], | 99.99th=[252707] bw ( KiB/s): min= 7, max= 128, per=25.30%, avg=44.79, stdev=18.09, samples=263 iops : min= 1, max= 32, avg=10.53, stdev= 4.59, samples=263 write: IOPS=11, BW=46.2KiB/s (47.3kB/s)(6236KiB/135116msec); 0 zone resets clat (usec): min=794, max=1211.4k, avg=38733.36, stdev=49005.03 lat (usec): min=796, max=1211.4k, avg=38740.52, stdev=49003.46 clat percentiles (usec): | 1.00th=[ 1106], 5.00th=[ 1221], 10.00th=[ 1401], | 20.00th=[ 3490], 30.00th=[ 7767], 40.00th=[ 17957], | 50.00th=[ 27919], 60.00th=[ 36963], 70.00th=[ 50070], | 80.00th=[ 65799], 90.00th=[ 92799], 95.00th=[ 117965], | 99.00th=[ 166724], 99.50th=[ 191890], 99.90th=[ 233833], | 99.95th=[1216349], 99.99th=[1216349] bw ( KiB/s): min= 7, max= 117, per=24.86%, avg=46.23, stdev=21.67, samples=262 iops : min= 1, max= 29, avg=10.91, stdev= 5.48, samples=262 lat (usec) : 250=1.79%, 500=0.20%, 1000=0.20% lat (msec) : 2=7.13%, 4=4.04%, 10=5.66%, 20=8.27%, 50=38.35% lat (msec) : 100=27.02%, 250=7.29%, 500=0.03%, 2000=0.03% cpu : usr=0.09%, sys=4.43%, ctx=6354, 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=178KiB/s (182kB/s), 44.3KiB/s-46.4KiB/s (45.4kB/s-47.5kB/s), io=23.4MiB (24.6MB), run=129816-135116msec WRITE: bw=186KiB/s (191kB/s), 46.2KiB/s-48.2KiB/s (47.3kB/s-49.4kB/s), io=24.6MiB (25.7MB), run=129816-135116msec rand-rw: (groupid=0, jobs=1): err= 0: pid=182047: Mon Jan 12 19:34:20 2026 read: IOPS=8, BW=33.9KiB/s (34.7kB/s)(5992KiB/176668msec) clat (msec): min=5, max=1232, avg=47.41, stdev=52.33 lat (msec): min=5, max=1232, avg=47.41, stdev=52.33 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 14], 20.00th=[ 18], | 30.00th=[ 22], 40.00th=[ 27], 50.00th=[ 32], 60.00th=[ 40], | 70.00th=[ 50], 80.00th=[ 68], 90.00th=[ 100], 95.00th=[ 140], | 99.00th=[ 203], 99.50th=[ 243], 99.90th=[ 334], 99.95th=[ 1234], | 99.99th=[ 1234] bw ( KiB/s): min= 7, max= 151, per=25.64%, avg=34.61, stdev=23.76, samples=333 iops : min= 1, max= 37, avg= 7.98, stdev= 5.98, samples=333 write: IOPS=8, BW=35.6KiB/s (36.5kB/s)(6296KiB/176668msec); 0 zone resets clat (msec): min=9, max=365, avg=66.75, stdev=46.52 lat (msec): min=9, max=365, avg=66.76, stdev=46.52 clat percentiles (msec): | 1.00th=[ 13], 5.00th=[ 20], 10.00th=[ 25], 20.00th=[ 32], | 30.00th=[ 38], 40.00th=[ 44], 50.00th=[ 53], 60.00th=[ 64], | 70.00th=[ 78], 80.00th=[ 96], 90.00th=[ 128], 95.00th=[ 161], | 99.00th=[ 234], 99.50th=[ 262], 99.90th=[ 330], 99.95th=[ 368], | 99.99th=[ 368] bw ( KiB/s): min= 7, max= 143, per=25.21%, avg=35.80, stdev=22.11, samples=338 iops : min= 1, max= 35, avg= 8.27, stdev= 5.56, samples=338 lat (msec) : 10=1.95%, 20=13.61%, 50=42.74%, 100=27.51%, 250=13.74% lat (msec) : 500=0.42%, 2000=0.03% cpu : usr=0.06%, sys=1.64%, ctx=4708, 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=182048: Mon Jan 12 19:34:20 2026 read: IOPS=8, BW=33.8KiB/s (34.6kB/s)(5940KiB/175941msec) clat (msec): min=6, max=1072, avg=45.22, stdev=46.80 lat (msec): min=6, max=1072, avg=45.22, stdev=46.80 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 14], 20.00th=[ 18], | 30.00th=[ 22], 40.00th=[ 26], 50.00th=[ 31], 60.00th=[ 37], | 70.00th=[ 47], 80.00th=[ 64], 90.00th=[ 96], 95.00th=[ 128], | 99.00th=[ 188], 99.50th=[ 228], 99.90th=[ 268], 99.95th=[ 1070], | 99.99th=[ 1070] bw ( KiB/s): min= 7, max= 126, per=25.68%, avg=34.67, stdev=22.45, samples=332 iops : min= 1, max= 31, avg= 7.99, stdev= 5.64, samples=332 write: IOPS=9, BW=36.1KiB/s (36.9kB/s)(6348KiB/175941msec); 0 zone resets clat (msec): min=8, max=384, avg=68.14, stdev=48.17 lat (msec): min=8, max=384, avg=68.15, stdev=48.17 clat percentiles (msec): | 1.00th=[ 14], 5.00th=[ 22], 10.00th=[ 26], 20.00th=[ 32], | 30.00th=[ 38], 40.00th=[ 44], 50.00th=[ 52], 60.00th=[ 64], | 70.00th=[ 79], 80.00th=[ 103], 90.00th=[ 136], 95.00th=[ 163], | 99.00th=[ 236], 99.50th=[ 275], 99.90th=[ 330], 99.95th=[ 384], | 99.99th=[ 384] bw ( KiB/s): min= 7, max= 143, per=25.16%, avg=35.72, stdev=21.56, samples=344 iops : min= 1, max= 35, avg= 8.26, stdev= 5.43, samples=344 lat (msec) : 10=1.01%, 20=13.48%, 50=45.57%, 100=24.74%, 250=14.62% lat (msec) : 500=0.55%, 2000=0.03% cpu : usr=0.05%, sys=1.56%, ctx=4601, 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=182050: Mon Jan 12 19:34:20 2026 read: IOPS=8, BW=34.2KiB/s (35.1kB/s)(6028KiB/176027msec) clat (msec): min=6, max=338, avg=47.98, stdev=42.52 lat (msec): min=6, max=338, avg=47.98, stdev=42.52 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 14], 20.00th=[ 18], | 30.00th=[ 22], 40.00th=[ 27], 50.00th=[ 32], 60.00th=[ 41], | 70.00th=[ 53], 80.00th=[ 71], 90.00th=[ 110], 95.00th=[ 138], | 99.00th=[ 205], 99.50th=[ 228], 99.90th=[ 268], 99.95th=[ 338], | 99.99th=[ 338] bw ( KiB/s): min= 7, max= 132, per=25.47%, avg=34.38, stdev=22.52, samples=339 iops : min= 1, max= 33, avg= 7.92, stdev= 5.68, samples=339 write: IOPS=8, BW=35.6KiB/s (36.4kB/s)(6260KiB/176027msec); 0 zone resets clat (msec): min=6, max=1254, avg=65.96, stdev=52.93 lat (msec): min=6, max=1254, avg=65.97, stdev=52.93 clat percentiles (msec): | 1.00th=[ 16], 5.00th=[ 21], 10.00th=[ 26], 20.00th=[ 32], | 30.00th=[ 38], 40.00th=[ 44], 50.00th=[ 52], 60.00th=[ 63], | 70.00th=[ 77], 80.00th=[ 93], 90.00th=[ 124], 95.00th=[ 157], | 99.00th=[ 220], 99.50th=[ 251], 99.90th=[ 368], 99.95th=[ 1250], | 99.99th=[ 1250] bw ( KiB/s): min= 7, max= 127, per=25.15%, avg=35.72, stdev=21.55, samples=339 iops : min= 1, max= 31, avg= 8.25, stdev= 5.42, samples=339 lat (msec) : 10=1.46%, 20=13.61%, 50=43.23%, 100=27.21%, 250=14.13% lat (msec) : 500=0.33%, 2000=0.03% cpu : usr=0.07%, sys=1.62%, ctx=4513, 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=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=182051: Mon Jan 12 19:34:20 2026 read: IOPS=8, BW=34.6KiB/s (35.4kB/s)(6052KiB/174889msec) clat (msec): min=5, max=290, avg=45.82, stdev=40.28 lat (msec): min=5, max=290, avg=45.82, stdev=40.28 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 14], 20.00th=[ 18], | 30.00th=[ 22], 40.00th=[ 27], 50.00th=[ 32], 60.00th=[ 39], | 70.00th=[ 48], 80.00th=[ 66], 90.00th=[ 102], 95.00th=[ 133], | 99.00th=[ 190], 99.50th=[ 222], 99.90th=[ 284], 99.95th=[ 292], | 99.99th=[ 292] bw ( KiB/s): min= 7, max= 110, per=25.96%, avg=35.05, stdev=22.21, samples=335 iops : min= 1, max= 27, avg= 8.09, stdev= 5.59, samples=335 write: IOPS=8, BW=35.7KiB/s (36.5kB/s)(6236KiB/174889msec); 0 zone resets clat (msec): min=10, max=1246, avg=67.39, stdev=54.50 lat (msec): min=10, max=1246, avg=67.40, stdev=54.50 clat percentiles (msec): | 1.00th=[ 16], 5.00th=[ 21], 10.00th=[ 26], 20.00th=[ 32], | 30.00th=[ 38], 40.00th=[ 45], 50.00th=[ 53], 60.00th=[ 64], | 70.00th=[ 78], 80.00th=[ 99], 90.00th=[ 129], 95.00th=[ 159], | 99.00th=[ 234], 99.50th=[ 268], 99.90th=[ 388], 99.95th=[ 1250], | 99.99th=[ 1250] bw ( KiB/s): min= 7, max= 125, per=25.13%, avg=35.68, stdev=21.38, samples=339 iops : min= 1, max= 31, avg= 8.24, stdev= 5.37, samples=339 lat (msec) : 10=1.40%, 20=13.15%, 50=44.89%, 100=26.20%, 250=13.96% lat (msec) : 500=0.36%, 2000=0.03% cpu : usr=0.05%, sys=1.68%, ctx=4681, 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=136KiB/s (139kB/s), 33.8KiB/s-34.6KiB/s (34.6kB/s-35.4kB/s), io=23.4MiB (24.6MB), run=174889-176668msec WRITE: bw=142KiB/s (146kB/s), 35.6KiB/s-36.1KiB/s (36.4kB/s-36.9kB/s), io=24.6MiB (25.7MB), run=174889-176668msec 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=182090: Mon Jan 12 19:35:06 2026 read: IOPS=10, BW=170KiB/s (174kB/s)(5920KiB/34863msec) clat (usec): min=129, max=152448, avg=49123.14, stdev=30655.36 lat (usec): min=129, max=152449, avg=49125.41, stdev=30656.69 clat percentiles (usec): | 1.00th=[ 149], 5.00th=[ 188], 10.00th=[ 15270], 20.00th=[ 26084], | 30.00th=[ 31327], 40.00th=[ 36439], 50.00th=[ 42730], 60.00th=[ 52691], | 70.00th=[ 62129], 80.00th=[ 72877], 90.00th=[ 91751], 95.00th=[110625], | 99.00th=[135267], 99.50th=[147850], 99.90th=[152044], 99.95th=[152044], | 99.99th=[152044] bw ( KiB/s): min= 30, max= 351, per=24.83%, avg=169.35, stdev=74.31, samples=68 iops : min= 1, max= 21, avg= 9.79, stdev= 4.66, samples=68 write: IOPS=11, BW=183KiB/s (187kB/s)(6368KiB/34863msec); 0 zone resets clat (usec): min=1341, max=327809, avg=41761.17, stdev=43289.47 lat (usec): min=1343, max=327811, avg=41763.73, stdev=43289.39 clat percentiles (usec): | 1.00th=[ 1532], 5.00th=[ 1926], 10.00th=[ 3818], 20.00th=[ 7177], | 30.00th=[ 13829], 40.00th=[ 19530], 50.00th=[ 26608], 60.00th=[ 35914], | 70.00th=[ 49021], 80.00th=[ 71828], 90.00th=[ 95945], 95.00th=[135267], | 99.00th=[179307], 99.50th=[187696], 99.90th=[329253], 99.95th=[329253], | 99.99th=[329253] bw ( KiB/s): min= 31, max= 413, per=25.48%, avg=182.72, stdev=74.39, samples=68 iops : min= 1, max= 25, avg=10.65, stdev= 4.67, samples=68 lat (usec) : 250=3.12%, 500=0.39%, 750=0.26%, 1000=0.13% lat (msec) : 2=2.86%, 4=2.99%, 10=7.03%, 20=10.94%, 50=36.59% lat (msec) : 100=27.47%, 250=8.07%, 500=0.13% cpu : usr=0.06%, sys=5.13%, ctx=1738, 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=182091: Mon Jan 12 19:35:06 2026 read: IOPS=10, BW=164KiB/s (168kB/s)(5744KiB/35098msec) clat (usec): min=135, max=309640, avg=53205.48, stdev=35894.00 lat (usec): min=137, max=309642, avg=53208.81, stdev=35893.75 clat percentiles (usec): | 1.00th=[ 157], 5.00th=[ 627], 10.00th=[ 19006], 20.00th=[ 26346], | 30.00th=[ 34341], 40.00th=[ 41681], 50.00th=[ 48497], 60.00th=[ 54789], | 70.00th=[ 62653], 80.00th=[ 76022], 90.00th=[ 91751], 95.00th=[113771], | 99.00th=[219153], 99.50th=[238027], 99.90th=[308282], 99.95th=[308282], | 99.99th=[308282] bw ( KiB/s): min= 57, max= 282, per=23.90%, avg=163.03, stdev=55.57, samples=69 iops : min= 3, max= 17, avg= 9.39, stdev= 3.46, samples=69 write: IOPS=11, BW=186KiB/s (191kB/s)(6544KiB/35098msec); 0 zone resets clat (usec): min=1473, max=234589, avg=38696.10, stdev=38090.00 lat (usec): min=1475, max=234592, avg=38704.44, stdev=38089.03 clat percentiles (usec): | 1.00th=[ 1663], 5.00th=[ 1860], 10.00th=[ 3326], 20.00th=[ 6849], | 30.00th=[ 11600], 40.00th=[ 20317], 50.00th=[ 28181], 60.00th=[ 35390], | 70.00th=[ 48497], 80.00th=[ 63177], 90.00th=[ 92799], 95.00th=[124257], | 99.00th=[156238], 99.50th=[177210], 99.90th=[233833], 99.95th=[233833], | 99.99th=[233833] bw ( KiB/s): min= 31, max= 375, per=26.26%, avg=188.28, stdev=82.46, samples=68 iops : min= 1, max= 23, avg=11.00, stdev= 5.26, samples=68 lat (usec) : 250=1.95%, 500=0.26%, 750=0.26% lat (msec) : 2=3.78%, 4=2.99%, 10=7.42%, 20=9.51%, 50=36.07% lat (msec) : 100=30.34%, 250=7.29%, 500=0.13% cpu : usr=0.07%, sys=5.28%, ctx=1752, 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=182093: Mon Jan 12 19:35:06 2026 read: IOPS=11, BW=178KiB/s (183kB/s)(6256KiB/35056msec) clat (usec): min=110, max=256647, avg=49972.45, stdev=31727.66 lat (usec): min=111, max=256649, avg=49975.10, stdev=31727.08 clat percentiles (usec): | 1.00th=[ 149], 5.00th=[ 192], 10.00th=[ 16057], 20.00th=[ 27132], | 30.00th=[ 33162], 40.00th=[ 39584], 50.00th=[ 45351], 60.00th=[ 52691], | 70.00th=[ 60556], 80.00th=[ 70779], 90.00th=[ 94897], 95.00th=[108528], | 99.00th=[131597], 99.50th=[193987], 99.90th=[256902], 99.95th=[256902], | 99.99th=[256902] bw ( KiB/s): min= 62, max= 350, per=26.18%, avg=178.57, stdev=68.75, samples=69 iops : min= 3, max= 21, avg=10.38, stdev= 4.31, samples=69 write: IOPS=10, BW=172KiB/s (176kB/s)(6032KiB/35056msec); 0 zone resets clat (usec): min=1485, max=256433, avg=40730.07, stdev=38529.37 lat (usec): min=1487, max=256436, avg=40746.43, stdev=38518.95 clat percentiles (usec): | 1.00th=[ 1696], 5.00th=[ 1811], 10.00th=[ 3032], 20.00th=[ 7111], | 30.00th=[ 14222], 40.00th=[ 22676], 50.00th=[ 31589], 60.00th=[ 40633], | 70.00th=[ 51643], 80.00th=[ 67634], 90.00th=[ 92799], 95.00th=[113771], | 99.00th=[156238], 99.50th=[244319], 99.90th=[256902], 99.95th=[256902], | 99.99th=[256902] bw ( KiB/s): min= 31, max= 348, per=23.84%, avg=170.96, stdev=71.05, samples=69 iops : min= 1, max= 21, avg= 9.90, stdev= 4.47, samples=69 lat (usec) : 250=3.12%, 500=0.26%, 750=0.26% lat (msec) : 2=3.65%, 4=3.52%, 10=5.86%, 20=7.94%, 50=38.67% lat (msec) : 100=28.91%, 250=7.55%, 500=0.26% cpu : usr=0.05%, sys=5.19%, ctx=1784, 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=182094: Mon Jan 12 19:35:06 2026 read: IOPS=10, BW=175KiB/s (179kB/s)(6032KiB/34528msec) clat (usec): min=127, max=228645, avg=48979.92, stdev=33291.94 lat (usec): min=127, max=228647, avg=48982.35, stdev=33291.14 clat percentiles (usec): | 1.00th=[ 141], 5.00th=[ 167], 10.00th=[ 277], 20.00th=[ 24249], | 30.00th=[ 34341], 40.00th=[ 40109], 50.00th=[ 45876], 60.00th=[ 52167], | 70.00th=[ 61604], 80.00th=[ 70779], 90.00th=[ 86508], 95.00th=[103285], | 99.00th=[177210], 99.50th=[187696], 99.90th=[229639], 99.95th=[229639], | 99.99th=[229639] bw ( KiB/s): min= 63, max= 320, per=25.53%, avg=174.10, stdev=67.24, samples=68 iops : min= 3, max= 20, avg=10.10, stdev= 4.25, samples=68 write: IOPS=11, BW=181KiB/s (186kB/s)(6256KiB/34528msec); 0 zone resets clat (usec): min=1483, max=253672, avg=40713.97, stdev=40244.31 lat (usec): min=1487, max=253674, avg=40716.57, stdev=40244.31 clat percentiles (usec): | 1.00th=[ 1663], 5.00th=[ 2474], 10.00th=[ 3982], 20.00th=[ 7504], | 30.00th=[ 14615], 40.00th=[ 21890], 50.00th=[ 29230], 60.00th=[ 35390], | 70.00th=[ 47973], 80.00th=[ 67634], 90.00th=[ 96994], 95.00th=[121111], | 99.00th=[173016], 99.50th=[219153], 99.90th=[252707], 99.95th=[252707], | 99.99th=[252707] bw ( KiB/s): min= 60, max= 383, per=25.26%, avg=181.15, stdev=76.37, samples=68 iops : min= 3, max= 23, avg=10.54, stdev= 4.76, samples=68 lat (usec) : 250=4.82%, 500=0.39%, 750=0.13% lat (msec) : 2=2.34%, 4=3.12%, 10=7.42%, 20=8.46%, 50=37.76% lat (msec) : 100=27.99%, 250=7.42%, 500=0.13% cpu : usr=0.08%, sys=5.13%, ctx=1680, 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=682KiB/s (699kB/s), 164KiB/s-178KiB/s (168kB/s-183kB/s), io=23.4MiB (24.5MB), run=34528-35098msec WRITE: bw=718KiB/s (735kB/s), 172KiB/s-186KiB/s (176kB/s-191kB/s), io=24.6MiB (25.8MB), run=34528-35098msec rand-rw: (groupid=0, jobs=1): err= 0: pid=182096: Mon Jan 12 19:35:16 2026 read: IOPS=8, BW=131KiB/s (134kB/s)(5920KiB/45177msec) clat (msec): min=6, max=422, avg=47.54, stdev=47.58 lat (msec): min=6, max=422, avg=47.54, stdev=47.58 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 16], | 30.00th=[ 21], 40.00th=[ 25], 50.00th=[ 31], 60.00th=[ 39], | 70.00th=[ 49], 80.00th=[ 69], 90.00th=[ 113], 95.00th=[ 150], | 99.00th=[ 224], 99.50th=[ 264], 99.90th=[ 422], 99.95th=[ 422], | 99.99th=[ 422] bw ( KiB/s): min= 30, max= 542, per=24.55%, avg=129.37, stdev=94.02, samples=87 iops : min= 1, max= 33, avg= 7.26, stdev= 5.92, samples=87 write: IOPS=8, BW=141KiB/s (144kB/s)(6368KiB/45177msec); 0 zone resets clat (msec): min=9, max=345, avg=69.15, stdev=53.32 lat (msec): min=9, max=345, avg=69.16, stdev=53.32 clat percentiles (msec): | 1.00th=[ 15], 5.00th=[ 21], 10.00th=[ 24], 20.00th=[ 30], | 30.00th=[ 35], 40.00th=[ 42], 50.00th=[ 49], 60.00th=[ 62], | 70.00th=[ 83], 80.00th=[ 104], 90.00th=[ 146], 95.00th=[ 171], | 99.00th=[ 296], 99.50th=[ 342], 99.90th=[ 347], 99.95th=[ 347], | 99.99th=[ 347] bw ( KiB/s): min= 31, max= 381, per=25.03%, avg=138.90, stdev=93.81, samples=88 iops : min= 1, max= 23, avg= 7.86, stdev= 5.92, samples=88 lat (msec) : 10=2.34%, 20=14.58%, 50=44.53%, 100=21.22%, 250=16.41% lat (msec) : 500=0.91% cpu : usr=0.06%, sys=1.74%, ctx=1201, 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=182097: Mon Jan 12 19:35:16 2026 read: IOPS=7, BW=127KiB/s (130kB/s)(5744KiB/45393msec) clat (msec): min=7, max=350, avg=47.51, stdev=45.92 lat (msec): min=7, max=350, avg=47.51, stdev=45.92 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 21], 40.00th=[ 24], 50.00th=[ 30], 60.00th=[ 39], | 70.00th=[ 53], 80.00th=[ 72], 90.00th=[ 107], 95.00th=[ 142], | 99.00th=[ 224], 99.50th=[ 239], 99.90th=[ 351], 99.95th=[ 351], | 99.99th=[ 351] bw ( KiB/s): min= 24, max= 448, per=24.85%, avg=130.96, stdev=92.42, samples=85 iops : min= 1, max= 28, avg= 7.36, stdev= 5.84, samples=85 write: IOPS=9, BW=144KiB/s (148kB/s)(6544KiB/45393msec); 0 zone resets clat (msec): min=11, max=405, avg=69.14, stdev=54.13 lat (msec): min=11, max=405, avg=69.14, stdev=54.13 clat percentiles (msec): | 1.00th=[ 14], 5.00th=[ 19], 10.00th=[ 24], 20.00th=[ 30], | 30.00th=[ 35], 40.00th=[ 41], 50.00th=[ 51], 60.00th=[ 63], | 70.00th=[ 79], 80.00th=[ 107], 90.00th=[ 148], 95.00th=[ 176], | 99.00th=[ 253], 99.50th=[ 300], 99.90th=[ 405], 99.95th=[ 405], | 99.99th=[ 405] bw ( KiB/s): min= 30, max= 510, per=25.66%, avg=142.44, stdev=99.50, samples=89 iops : min= 1, max= 31, avg= 8.09, stdev= 6.27, samples=89 lat (msec) : 10=1.17%, 20=16.41%, 50=40.89%, 100=24.22%, 250=16.54% lat (msec) : 500=0.78% cpu : usr=0.06%, sys=1.80%, ctx=1202, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=359,409,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=182098: Mon Jan 12 19:35:16 2026 read: IOPS=8, BW=138KiB/s (141kB/s)(6256KiB/45402msec) clat (msec): min=7, max=353, avg=46.05, stdev=42.98 lat (msec): min=7, max=353, avg=46.05, stdev=42.98 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 12], 20.00th=[ 17], | 30.00th=[ 21], 40.00th=[ 26], 50.00th=[ 31], 60.00th=[ 37], | 70.00th=[ 49], 80.00th=[ 67], 90.00th=[ 108], 95.00th=[ 150], | 99.00th=[ 192], 99.50th=[ 205], 99.90th=[ 355], 99.95th=[ 355], | 99.99th=[ 355] bw ( KiB/s): min= 30, max= 508, per=26.11%, avg=137.58, stdev=109.89, samples=89 iops : min= 1, max= 31, avg= 7.79, stdev= 6.95, samples=89 write: IOPS=8, BW=133KiB/s (136kB/s)(6032KiB/45402msec); 0 zone resets clat (msec): min=13, max=425, avg=72.58, stdev=52.49 lat (msec): min=13, max=425, avg=72.58, stdev=52.49 clat percentiles (msec): | 1.00th=[ 15], 5.00th=[ 21], 10.00th=[ 25], 20.00th=[ 32], | 30.00th=[ 37], 40.00th=[ 46], 50.00th=[ 54], 60.00th=[ 69], | 70.00th=[ 89], 80.00th=[ 112], 90.00th=[ 144], 95.00th=[ 178], | 99.00th=[ 241], 99.50th=[ 255], 99.90th=[ 426], 99.95th=[ 426], | 99.99th=[ 426] bw ( KiB/s): min= 31, max= 415, per=23.43%, avg=130.04, stdev=83.44, samples=89 iops : min= 1, max= 25, avg= 7.30, stdev= 5.27, samples=89 lat (msec) : 10=2.08%, 20=14.19%, 50=42.84%, 100=22.53%, 250=17.84% lat (msec) : 500=0.52% cpu : usr=0.06%, sys=1.72%, ctx=1254, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=182099: Mon Jan 12 19:35:16 2026 read: IOPS=8, BW=136KiB/s (139kB/s)(6032KiB/44509msec) clat (msec): min=7, max=279, avg=44.49, stdev=38.52 lat (msec): min=7, max=279, avg=44.51, stdev=38.54 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 12], 10.00th=[ 14], 20.00th=[ 18], | 30.00th=[ 23], 40.00th=[ 27], 50.00th=[ 34], 60.00th=[ 38], | 70.00th=[ 46], 80.00th=[ 64], 90.00th=[ 96], 95.00th=[ 121], | 99.00th=[ 215], 99.50th=[ 230], 99.90th=[ 279], 99.95th=[ 279], | 99.99th=[ 279] bw ( KiB/s): min= 31, max= 480, per=26.08%, avg=137.44, stdev=99.06, samples=85 iops : min= 1, max= 30, avg= 7.76, stdev= 6.28, samples=85 write: IOPS=8, BW=141KiB/s (144kB/s)(6256KiB/44509msec); 0 zone resets clat (msec): min=12, max=309, avg=70.77, stdev=49.98 lat (msec): min=12, max=309, avg=70.77, stdev=49.98 clat percentiles (msec): | 1.00th=[ 16], 5.00th=[ 20], 10.00th=[ 26], 20.00th=[ 32], | 30.00th=[ 38], 40.00th=[ 44], 50.00th=[ 55], 60.00th=[ 66], | 70.00th=[ 88], 80.00th=[ 109], 90.00th=[ 140], 95.00th=[ 169], | 99.00th=[ 239], 99.50th=[ 300], 99.90th=[ 309], 99.95th=[ 309], | 99.99th=[ 309] bw ( KiB/s): min= 30, max= 479, per=25.24%, avg=140.07, stdev=88.22, samples=87 iops : min= 1, max= 29, avg= 7.94, stdev= 5.57, samples=87 lat (msec) : 10=1.82%, 20=13.28%, 50=44.27%, 100=23.96%, 250=16.15% lat (msec) : 500=0.52% cpu : usr=0.07%, sys=1.72%, ctx=1206, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=528KiB/s (540kB/s), 127KiB/s-138KiB/s (130kB/s-141kB/s), io=23.4MiB (24.5MB), run=44509-45402msec WRITE: bw=555KiB/s (568kB/s), 133KiB/s-144KiB/s (136kB/s-148kB/s), io=24.6MiB (25.8MB), run=44509-45402msec 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=182113: Mon Jan 12 19:35:34 2026 read: IOPS=1, BW=1794KiB/s (1837kB/s)(7168KiB/3995msec) clat (msec): min=183, max=441, avg=281.57, stdev=99.80 lat (msec): min=183, max=441, avg=281.57, stdev=99.80 clat percentiles (msec): | 1.00th=[ 184], 5.00th=[ 184], 10.00th=[ 184], 20.00th=[ 190], | 30.00th=[ 226], 40.00th=[ 226], 50.00th=[ 262], 60.00th=[ 275], | 70.00th=[ 275], 80.00th=[ 397], 90.00th=[ 443], 95.00th=[ 443], | 99.00th=[ 443], 99.50th=[ 443], 99.90th=[ 443], 99.95th=[ 443], | 99.99th=[ 443] bw ( KiB/s): min= 2031, max= 4432, per=91.79%, avg=3495.33, stdev=1284.53, samples=3 iops : min= 1, max= 4, avg= 2.67, stdev= 1.53, samples=3 write: IOPS=1, BW=1282KiB/s (1312kB/s)(5120KiB/3995msec); 0 zone resets clat (msec): min=227, max=585, avg=397.54, stdev=128.83 lat (msec): min=231, max=585, avg=398.44, stdev=127.47 clat percentiles (msec): | 1.00th=[ 228], 5.00th=[ 228], 10.00th=[ 228], 20.00th=[ 228], | 30.00th=[ 355], 40.00th=[ 355], 50.00th=[ 409], 60.00th=[ 409], | 70.00th=[ 414], 80.00th=[ 414], 90.00th=[ 584], 95.00th=[ 584], | 99.00th=[ 584], 99.50th=[ 584], 99.90th=[ 584], 99.95th=[ 584], | 99.99th=[ 584] bw ( KiB/s): min= 1835, max= 3946, per=46.12%, avg=2458.75, stdev=995.63, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 lat (msec) : 250=33.33%, 500=58.33%, 750=8.33% cpu : usr=0.00%, sys=12.94%, ctx=233, 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=182114: Mon Jan 12 19:35:34 2026 read: IOPS=0, BW=394KiB/s (404kB/s)(2048KiB/5194msec) clat (msec): min=160, max=268, avg=214.41, stdev=76.34 lat (msec): min=160, max=268, avg=214.41, stdev=76.34 clat percentiles (msec): | 1.00th=[ 161], 5.00th=[ 161], 10.00th=[ 161], 20.00th=[ 161], | 30.00th=[ 161], 40.00th=[ 161], 50.00th=[ 161], 60.00th=[ 268], | 70.00th=[ 268], 80.00th=[ 268], 90.00th=[ 268], 95.00th=[ 268], | 99.00th=[ 268], 99.50th=[ 268], 99.90th=[ 268], 99.95th=[ 268], | 99.99th=[ 268] bw ( KiB/s): min= 1414, max= 2031, per=45.23%, avg=1722.50, stdev=436.28, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1972KiB/s (2019kB/s)(10.0MiB/5194msec); 0 zone resets clat (msec): min=137, max=1204, avg=441.55, stdev=325.54 lat (msec): min=137, max=1204, avg=441.69, stdev=325.54 clat percentiles (msec): | 1.00th=[ 138], 5.00th=[ 138], 10.00th=[ 138], 20.00th=[ 167], | 30.00th=[ 203], 40.00th=[ 309], 50.00th=[ 330], 60.00th=[ 393], | 70.00th=[ 430], 80.00th=[ 468], 90.00th=[ 776], 95.00th=[ 1200], | 99.00th=[ 1200], 99.50th=[ 1200], 99.90th=[ 1200], 99.95th=[ 1200], | 99.99th=[ 1200] bw ( KiB/s): min= 1980, max= 4063, per=60.67%, avg=3234.40, stdev=1131.01, samples=5 iops : min= 1, max= 3, avg= 2.20, stdev= 1.10, samples=5 lat (msec) : 250=33.33%, 500=50.00%, 1000=8.33%, 2000=8.33% cpu : usr=0.00%, sys=11.11%, ctx=164, 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=182115: Mon Jan 12 19:35:34 2026 read: IOPS=1, BW=1142KiB/s (1170kB/s)(6144KiB/5378msec) clat (msec): min=155, max=466, avg=325.04, stdev=111.45 lat (msec): min=155, max=466, avg=325.04, stdev=111.45 clat percentiles (msec): | 1.00th=[ 157], 5.00th=[ 157], 10.00th=[ 157], 20.00th=[ 255], | 30.00th=[ 255], 40.00th=[ 313], 50.00th=[ 313], 60.00th=[ 347], | 70.00th=[ 414], 80.00th=[ 414], 90.00th=[ 468], 95.00th=[ 468], | 99.00th=[ 468], 99.50th=[ 468], 99.90th=[ 468], 99.95th=[ 468], | 99.99th=[ 468] bw ( KiB/s): min= 1950, max= 2031, per=52.32%, avg=1992.20, stdev=35.41, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 write: IOPS=1, BW=1142KiB/s (1170kB/s)(6144KiB/5378msec); 0 zone resets clat (msec): min=227, max=867, avg=516.65, stdev=288.87 lat (msec): min=227, max=867, avg=516.74, stdev=288.89 clat percentiles (msec): | 1.00th=[ 228], 5.00th=[ 228], 10.00th=[ 228], 20.00th=[ 228], | 30.00th=[ 228], 40.00th=[ 363], 50.00th=[ 363], 60.00th=[ 584], | 70.00th=[ 835], 80.00th=[ 835], 90.00th=[ 869], 95.00th=[ 869], | 99.00th=[ 869], 99.50th=[ 869], 99.90th=[ 869], 99.95th=[ 869], | 99.99th=[ 869] bw ( KiB/s): min= 1418, max= 2031, per=35.13%, avg=1872.83, stdev=233.80, samples=6 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=6 lat (msec) : 250=25.00%, 500=50.00%, 750=8.33%, 1000=16.67% cpu : usr=0.04%, sys=8.78%, ctx=217, 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=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=182116: Mon Jan 12 19:35:34 2026 read: IOPS=1, BW=1308KiB/s (1340kB/s)(5120KiB/3914msec) clat (usec): min=666, max=431287, avg=286467.61, stdev=171033.32 lat (usec): min=668, max=431289, avg=286469.00, stdev=171033.21 clat percentiles (usec): | 1.00th=[ 668], 5.00th=[ 668], 10.00th=[ 668], 20.00th=[ 668], | 30.00th=[278922], 40.00th=[278922], 50.00th=[316670], 60.00th=[316670], | 70.00th=[400557], 80.00th=[400557], 90.00th=[429917], 95.00th=[429917], | 99.00th=[429917], 99.50th=[429917], 99.90th=[429917], 99.95th=[429917], | 99.99th=[429917] bw ( KiB/s): min= 1973, max= 4047, per=70.30%, avg=2677.00, stdev=1186.61, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 write: IOPS=1, BW=1831KiB/s (1875kB/s)(7168KiB/3914msec); 0 zone resets clat (msec): min=171, max=486, avg=328.93, stdev=130.59 lat (msec): min=171, max=487, avg=329.14, stdev=130.72 clat percentiles (msec): | 1.00th=[ 171], 5.00th=[ 171], 10.00th=[ 171], 20.00th=[ 207], | 30.00th=[ 247], 40.00th=[ 247], 50.00th=[ 292], 60.00th=[ 430], | 70.00th=[ 430], 80.00th=[ 468], 90.00th=[ 489], 95.00th=[ 489], | 99.00th=[ 489], 99.50th=[ 489], 99.90th=[ 489], 99.95th=[ 489], | 99.99th=[ 489] bw ( KiB/s): min= 1519, max= 4063, per=50.54%, avg=2694.20, stdev=1244.84, samples=5 iops : min= 1, max= 3, avg= 1.80, stdev= 1.10, samples=5 lat (usec) : 750=8.33% lat (msec) : 250=25.00%, 500=66.67% cpu : usr=0.00%, sys=14.44%, ctx=252, 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=3808KiB/s (3900kB/s), 394KiB/s-1794KiB/s (404kB/s-1837kB/s), io=20.0MiB (20.0MB), run=3914-5378msec WRITE: bw=5331KiB/s (5459kB/s), 1142KiB/s-1972KiB/s (1170kB/s-2019kB/s), io=28.0MiB (29.4MB), run=3914-5378msec rand-rw: (groupid=0, jobs=1): err= 0: pid=182117: Mon Jan 12 19:35:34 2026 read: IOPS=1, BW=1445KiB/s (1479kB/s)(7168KiB/4962msec) clat (msec): min=86, max=613, avg=271.71, stdev=173.07 lat (msec): min=86, max=613, avg=271.71, stdev=173.07 clat percentiles (msec): | 1.00th=[ 87], 5.00th=[ 87], 10.00th=[ 87], 20.00th=[ 159], | 30.00th=[ 182], 40.00th=[ 182], 50.00th=[ 232], 60.00th=[ 284], | 70.00th=[ 284], 80.00th=[ 347], 90.00th=[ 617], 95.00th=[ 617], | 99.00th=[ 617], 99.50th=[ 617], 99.90th=[ 617], 99.95th=[ 617], | 99.99th=[ 617] bw ( KiB/s): min= 1976, max= 4039, per=85.21%, avg=2981.50, stdev=1146.76, samples=4 iops : min= 1, max= 3, avg= 2.00, stdev= 1.15, samples=4 write: IOPS=1, BW=1032KiB/s (1057kB/s)(5120KiB/4962msec); 0 zone resets clat (msec): min=174, max=674, avg=525.10, stdev=209.75 lat (msec): min=174, max=674, avg=525.20, stdev=209.76 clat percentiles (msec): | 1.00th=[ 176], 5.00th=[ 176], 10.00th=[ 176], 20.00th=[ 176], | 30.00th=[ 485], 40.00th=[ 485], 50.00th=[ 642], 60.00th=[ 642], | 70.00th=[ 651], 80.00th=[ 651], 90.00th=[ 676], 95.00th=[ 676], | 99.00th=[ 676], 99.50th=[ 676], 99.90th=[ 676], 99.95th=[ 676], | 99.99th=[ 676] bw ( KiB/s): min= 1906, max= 2039, per=40.41%, avg=1979.25, stdev=55.07, samples=4 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=4 lat (msec) : 100=8.33%, 250=33.33%, 500=25.00%, 750=33.33% cpu : usr=0.00%, sys=1.87%, ctx=95, 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=182118: Mon Jan 12 19:35:34 2026 read: IOPS=0, BW=350KiB/s (358kB/s)(2048KiB/5853msec) clat (msec): min=91, max=219, avg=155.47, stdev=90.83 lat (msec): min=91, max=219, avg=155.48, stdev=90.83 clat percentiles (msec): | 1.00th=[ 92], 5.00th=[ 92], 10.00th=[ 92], 20.00th=[ 92], | 30.00th=[ 92], 40.00th=[ 92], 50.00th=[ 92], 60.00th=[ 220], | 70.00th=[ 220], 80.00th=[ 220], 90.00th=[ 220], 95.00th=[ 220], | 99.00th=[ 220], 99.50th=[ 220], 99.90th=[ 220], 99.95th=[ 220], | 99.99th=[ 220] bw ( KiB/s): min= 1939, max= 2003, per=56.33%, avg=1971.00, stdev=45.25, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1750KiB/s (1792kB/s)(10.0MiB/5853msec); 0 zone resets clat (msec): min=57, max=1238, avg=513.95, stdev=425.53 lat (msec): min=57, max=1238, avg=514.05, stdev=425.53 clat percentiles (msec): | 1.00th=[ 58], 5.00th=[ 58], 10.00th=[ 58], 20.00th=[ 155], | 30.00th=[ 222], 40.00th=[ 232], 50.00th=[ 279], 60.00th=[ 342], | 70.00th=[ 575], 80.00th=[ 1003], 90.00th=[ 1036], 95.00th=[ 1234], | 99.00th=[ 1234], 99.50th=[ 1234], 99.90th=[ 1234], 99.95th=[ 1234], | 99.99th=[ 1234] bw ( KiB/s): min= 1906, max= 6144, per=61.03%, avg=2989.17, stdev=1722.78, samples=6 iops : min= 1, max= 6, avg= 2.17, stdev= 2.04, samples=6 lat (msec) : 100=16.67%, 250=33.33%, 500=16.67%, 750=8.33%, 1000=8.33% lat (msec) : 2000=16.67% cpu : usr=0.02%, sys=5.08%, ctx=109, 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=182119: Mon Jan 12 19:35:34 2026 read: IOPS=1, BW=1273KiB/s (1304kB/s)(6144KiB/4826msec) clat (msec): min=118, max=803, avg=405.29, stdev=279.75 lat (msec): min=118, max=803, avg=405.29, stdev=279.75 clat percentiles (msec): | 1.00th=[ 120], 5.00th=[ 120], 10.00th=[ 120], 20.00th=[ 171], | 30.00th=[ 171], 40.00th=[ 245], 50.00th=[ 245], 60.00th=[ 426], | 70.00th=[ 667], 80.00th=[ 667], 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= 1906, max= 3984, per=70.16%, avg=2455.00, stdev=1019.75, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 write: IOPS=1, BW=1273KiB/s (1304kB/s)(6144KiB/4826msec); 0 zone resets clat (msec): min=212, max=753, avg=388.56, stdev=216.24 lat (msec): min=212, max=753, avg=388.72, stdev=216.32 clat percentiles (msec): | 1.00th=[ 213], 5.00th=[ 213], 10.00th=[ 213], 20.00th=[ 215], | 30.00th=[ 215], 40.00th=[ 247], 50.00th=[ 247], 60.00th=[ 376], | 70.00th=[ 527], 80.00th=[ 527], 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= 1665, max= 3953, per=47.69%, avg=2335.80, stdev=917.13, samples=5 iops : min= 1, max= 3, avg= 1.40, stdev= 0.89, samples=5 lat (msec) : 250=50.00%, 500=16.67%, 750=16.67%, 1000=16.67% cpu : usr=0.02%, sys=5.06%, ctx=100, 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=182120: Mon Jan 12 19:35:34 2026 read: IOPS=0, BW=937KiB/s (960kB/s)(5120KiB/5463msec) clat (msec): min=39, max=801, avg=439.22, stdev=336.52 lat (msec): min=39, max=801, avg=439.22, stdev=336.52 clat percentiles (msec): | 1.00th=[ 40], 5.00th=[ 40], 10.00th=[ 40], 20.00th=[ 40], | 30.00th=[ 136], 40.00th=[ 136], 50.00th=[ 535], 60.00th=[ 535], | 70.00th=[ 684], 80.00th=[ 684], 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= 1939, max= 2039, per=56.77%, avg=1986.50, stdev=41.44, samples=4 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=4 write: IOPS=1, BW=1312KiB/s (1344kB/s)(7168KiB/5463msec); 0 zone resets clat (msec): min=76, max=860, avg=429.66, stdev=303.19 lat (msec): min=76, max=860, avg=429.76, stdev=303.19 clat percentiles (msec): | 1.00th=[ 77], 5.00th=[ 77], 10.00th=[ 77], 20.00th=[ 167], | 30.00th=[ 275], 40.00th=[ 275], 50.00th=[ 347], 60.00th=[ 481], | 70.00th=[ 481], 80.00th=[ 802], 90.00th=[ 860], 95.00th=[ 860], | 99.00th=[ 860], 99.50th=[ 860], 99.90th=[ 860], 99.95th=[ 860], | 99.99th=[ 860] bw ( KiB/s): min= 1939, max= 3908, per=50.37%, avg=2467.25, stdev=961.12, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 lat (msec) : 50=8.33%, 100=8.33%, 250=16.67%, 500=25.00%, 750=16.67% lat (msec) : 1000=25.00% cpu : usr=0.00%, sys=2.51%, ctx=80, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=5,7,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=3499KiB/s (3583kB/s), 350KiB/s-1445KiB/s (358kB/s-1479kB/s), io=20.0MiB (20.0MB), run=4826-5853msec WRITE: bw=4899KiB/s (5016kB/s), 1032KiB/s-1750KiB/s (1057kB/s-1792kB/s), io=28.0MiB (29.4MB), run=4826-5853msec 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=182126: Mon Jan 12 19:35:50 2026 read: IOPS=0, BW=3979KiB/s (4075kB/s)(12.0MiB/3088msec) clat (msec): min=729, max=1370, avg=998.51, stdev=332.83 lat (msec): min=729, max=1370, avg=998.51, stdev=332.83 clat percentiles (msec): | 1.00th=[ 726], 5.00th=[ 726], 10.00th=[ 726], 20.00th=[ 726], | 30.00th=[ 726], 40.00th=[ 894], 50.00th=[ 894], 60.00th=[ 894], | 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= 8062, max= 8110, per=100.00%, avg=8086.00, stdev=33.94, 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=11.11%, ctx=437, 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=182128: Mon Jan 12 19:35:50 2026 read: IOPS=0, BW=1104KiB/s (1131kB/s)(4096KiB/3710msec) clat (nsec): min=1323.4M, max=1323.4M, avg=1323352483.00, stdev= 0.00 lat (nsec): min=1323.4M, max=1323.4M, avg=1323355153.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1318], 5.00th=[ 1318], 10.00th=[ 1318], 20.00th=[ 1318], | 30.00th=[ 1318], 40.00th=[ 1318], 50.00th=[ 1318], 60.00th=[ 1318], | 70.00th=[ 1318], 80.00th=[ 1318], 90.00th=[ 1318], 95.00th=[ 1318], | 99.00th=[ 1318], 99.50th=[ 1318], 99.90th=[ 1318], 99.95th=[ 1318], | 99.99th=[ 1318] 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 write: IOPS=0, BW=2208KiB/s (2261kB/s)(8192KiB/3710msec); 0 zone resets clat (msec): min=623, max=1603, avg=1113.48, stdev=693.02 lat (msec): min=623, max=1603, avg=1113.84, stdev=693.04 clat percentiles (msec): | 1.00th=[ 625], 5.00th=[ 625], 10.00th=[ 625], 20.00th=[ 625], | 30.00th=[ 625], 40.00th=[ 625], 50.00th=[ 625], 60.00th=[ 1603], | 70.00th=[ 1603], 80.00th=[ 1603], 90.00th=[ 1603], 95.00th=[ 1603], | 99.00th=[ 1603], 99.50th=[ 1603], 99.90th=[ 1603], 99.95th=[ 1603], | 99.99th=[ 1603] bw ( KiB/s): min= 8062, max= 8062, per=91.28%, avg=8062.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 750=33.33%, 2000=66.67% cpu : usr=0.00%, sys=3.32%, ctx=145, 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=182129: Mon Jan 12 19:35:50 2026 write: IOPS=0, BW=3591KiB/s (3677kB/s)(12.0MiB/3422msec); 0 zone resets clat (msec): min=514, max=1607, avg=1107.53, stdev=552.20 lat (msec): min=514, max=1607, avg=1108.45, stdev=552.32 clat percentiles (msec): | 1.00th=[ 514], 5.00th=[ 514], 10.00th=[ 514], 20.00th=[ 514], | 30.00th=[ 514], 40.00th=[ 1200], 50.00th=[ 1200], 60.00th=[ 1200], | 70.00th=[ 1603], 80.00th=[ 1603], 90.00th=[ 1603], 95.00th=[ 1603], | 99.00th=[ 1603], 99.50th=[ 1603], 99.90th=[ 1603], 99.95th=[ 1603], | 99.99th=[ 1603] bw ( KiB/s): min= 7907, max= 8110, per=90.68%, avg=8008.50, stdev=143.54, 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=4.00%, ctx=40, 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=182130: Mon Jan 12 19:35:50 2026 write: IOPS=0, BW=3360KiB/s (3441kB/s)(12.0MiB/3657msec); 0 zone resets clat (msec): min=262, max=2033, avg=1181.46, stdev=887.23 lat (msec): min=263, max=2033, avg=1182.63, stdev=887.33 clat percentiles (msec): | 1.00th=[ 264], 5.00th=[ 264], 10.00th=[ 264], 20.00th=[ 264], | 30.00th=[ 264], 40.00th=[ 1250], 50.00th=[ 1250], 60.00th=[ 1250], | 70.00th=[ 2039], 80.00th=[ 2039], 90.00th=[ 2039], 95.00th=[ 2039], | 99.00th=[ 2039], 99.50th=[ 2039], 99.90th=[ 2039], 99.95th=[ 2039], | 99.99th=[ 2039] bw ( KiB/s): min= 8110, max= 8110, per=91.83%, avg=8110.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=2.13%, ctx=41, 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=4416KiB/s (4522kB/s), 1104KiB/s-3979KiB/s (1131kB/s-4075kB/s), io=16.0MiB (16.8MB), run=3088-3710msec WRITE: bw=8832KiB/s (9044kB/s), 2208KiB/s-3591KiB/s (2261kB/s-3677kB/s), io=32.0MiB (33.6MB), run=3422-3710msec rand-rw: (groupid=0, jobs=1): err= 0: pid=182131: Mon Jan 12 19:35:51 2026 read: IOPS=0, BW=3405KiB/s (3487kB/s)(12.0MiB/3609msec) clat (msec): min=239, max=1795, avg=1146.56, stdev=809.15 lat (msec): min=239, max=1795, avg=1146.56, stdev=809.15 clat percentiles (msec): | 1.00th=[ 241], 5.00th=[ 241], 10.00th=[ 241], 20.00th=[ 241], | 30.00th=[ 241], 40.00th=[ 1401], 50.00th=[ 1401], 60.00th=[ 1401], | 70.00th=[ 1804], 80.00th=[ 1804], 90.00th=[ 1804], 95.00th=[ 1804], | 99.00th=[ 1804], 99.50th=[ 1804], 99.90th=[ 1804], 99.95th=[ 1804], | 99.99th=[ 1804] bw ( KiB/s): min= 8094, max= 8094, per=100.00%, avg=8094.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 250=33.33%, 2000=66.67% cpu : usr=0.03%, sys=2.74%, ctx=47, 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=182132: Mon Jan 12 19:35:51 2026 read: IOPS=0, BW=979KiB/s (1003kB/s)(4096KiB/4182msec) clat (nsec): min=1404.2M, max=1404.2M, avg=1404197115.00, stdev= 0.00 lat (nsec): min=1404.2M, max=1404.2M, avg=1404199504.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1401], 5.00th=[ 1401], 10.00th=[ 1401], 20.00th=[ 1401], | 30.00th=[ 1401], 40.00th=[ 1401], 50.00th=[ 1401], 60.00th=[ 1401], | 70.00th=[ 1401], 80.00th=[ 1401], 90.00th=[ 1401], 95.00th=[ 1401], | 99.00th=[ 1401], 99.50th=[ 1401], 99.90th=[ 1401], 99.95th=[ 1401], | 99.99th=[ 1401] bw ( KiB/s): min= 8062, max= 8062, per=100.00%, avg=8062.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=1959KiB/s (2006kB/s)(8192KiB/4182msec); 0 zone resets clat (msec): min=1311, max=1350, avg=1331.22, stdev=27.67 lat (msec): min=1312, max=1351, avg=1331.63, stdev=27.66 clat percentiles (msec): | 1.00th=[ 1318], 5.00th=[ 1318], 10.00th=[ 1318], 20.00th=[ 1318], | 30.00th=[ 1318], 40.00th=[ 1318], 50.00th=[ 1318], 60.00th=[ 1351], | 70.00th=[ 1351], 80.00th=[ 1351], 90.00th=[ 1351], 95.00th=[ 1351], | 99.00th=[ 1351], 99.50th=[ 1351], 99.90th=[ 1351], 99.95th=[ 1351], | 99.99th=[ 1351] bw ( KiB/s): min= 7937, max= 7937, per=100.00%, avg=7937.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 2000=100.00% cpu : usr=0.00%, sys=1.84%, ctx=43, 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=182133: Mon Jan 12 19:35:51 2026 write: IOPS=0, BW=2934KiB/s (3005kB/s)(12.0MiB/4188msec); 0 zone resets clat (msec): min=358, max=2302, avg=1306.90, stdev=972.54 lat (msec): min=359, max=2302, avg=1307.47, stdev=972.50 clat percentiles (msec): | 1.00th=[ 359], 5.00th=[ 359], 10.00th=[ 359], 20.00th=[ 359], | 30.00th=[ 359], 40.00th=[ 1267], 50.00th=[ 1267], 60.00th=[ 1267], | 70.00th=[ 2299], 80.00th=[ 2299], 90.00th=[ 2299], 95.00th=[ 2299], | 99.00th=[ 2299], 99.50th=[ 2299], 99.90th=[ 2299], 99.95th=[ 2299], | 99.99th=[ 2299] bw ( KiB/s): min= 8000, max= 8000, per=100.00%, avg=8000.00, 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=0.02%, sys=2.94%, ctx=50, 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=182134: Mon Jan 12 19:35:51 2026 write: IOPS=1, BW=4460KiB/s (4567kB/s)(12.0MiB/2755msec); 0 zone resets clat (msec): min=222, max=1349, avg=849.72, stdev=574.09 lat (msec): min=223, max=1355, avg=851.73, stdev=576.19 clat percentiles (msec): | 1.00th=[ 224], 5.00th=[ 224], 10.00th=[ 224], 20.00th=[ 224], | 30.00th=[ 224], 40.00th=[ 978], 50.00th=[ 978], 60.00th=[ 978], | 70.00th=[ 1351], 80.00th=[ 1351], 90.00th=[ 1351], 95.00th=[ 1351], | 99.00th=[ 1351], 99.50th=[ 1351], 99.90th=[ 1351], 99.95th=[ 1351], | 99.99th=[ 1351] bw ( KiB/s): min= 8000, max= 8062, per=100.00%, avg=8031.00, stdev=43.84, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 250=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=3.12%, ctx=51, majf=0, minf=8 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=3918KiB/s (4012kB/s), 979KiB/s-3405KiB/s (1003kB/s-3487kB/s), io=16.0MiB (16.8MB), run=3609-4182msec WRITE: bw=7824KiB/s (8012kB/s), 1959KiB/s-4460KiB/s (2006kB/s-4567kB/s), io=32.0MiB (33.6MB), run=2755-4188msec