== sanity test 398b: DIO and buffer IO race ============== 12:34:26 (1789058066) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 5.62851 s, 8.9 MB/s mix direct rw 4096 by fio with 4 jobs... mix buffer rw 4096 by fio with 4 jobs... rand-rw: (g=0): rw=randrw, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=psync, iodepth=16 ... fio-3.19 Starting 4 processes rand-rw: (g=0): rw=randrw, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=psync, iodepth=16 ... fio-3.19 Starting 4 processes rand-rw: (groupid=0, jobs=1): err= 0: pid=144727: Thu Sep 10 12:36:52 2026 read: IOPS=11, BW=47.2KiB/s (48.3kB/s)(5992KiB/126939msec) clat (usec): min=30, max=1072.2k, avg=40975.66, stdev=41651.74 lat (usec): min=30, max=1072.2k, avg=40978.40, stdev=41651.13 clat percentiles (usec): | 1.00th=[ 47], 5.00th=[ 57], 10.00th=[ 104], | 20.00th=[ 17695], 30.00th=[ 23200], 40.00th=[ 28181], | 50.00th=[ 33817], 60.00th=[ 40109], 70.00th=[ 49021], | 80.00th=[ 60031], 90.00th=[ 79168], 95.00th=[ 99091], | 99.00th=[ 147850], 99.50th=[ 189793], 99.90th=[ 295699], | 99.95th=[1069548], 99.99th=[1069548] bw ( KiB/s): min= 7, max= 119, per=25.31%, avg=47.33, stdev=20.89, samples=248 iops : min= 1, max= 29, avg=11.19, stdev= 5.26, samples=248 write: IOPS=12, BW=49.6KiB/s (50.8kB/s)(6296KiB/126939msec); 0 zone resets clat (usec): min=916, max=396989, avg=41401.70, stdev=42767.91 lat (usec): min=917, max=396992, avg=41405.41, stdev=42769.23 clat percentiles (usec): | 1.00th=[ 1074], 5.00th=[ 1205], 10.00th=[ 1614], 20.00th=[ 3916], | 30.00th=[ 7963], 40.00th=[ 17695], 50.00th=[ 29754], 60.00th=[ 42206], | 70.00th=[ 56886], 80.00th=[ 71828], 90.00th=[100140], 95.00th=[123208], | 99.00th=[168821], 99.50th=[198181], 99.90th=[387974], 99.95th=[396362], | 99.99th=[396362] bw ( KiB/s): min= 7, max= 135, per=25.35%, avg=49.44, stdev=21.66, samples=249 iops : min= 1, max= 33, avg=11.73, stdev= 5.48, samples=249 lat (usec) : 50=0.94%, 100=3.84%, 250=0.49%, 500=0.20%, 750=0.03% lat (usec) : 1000=0.07% lat (msec) : 2=6.09%, 4=4.43%, 10=6.90%, 20=9.99%, 50=35.12% lat (msec) : 100=24.61%, 250=7.13%, 500=0.13%, 2000=0.03% cpu : usr=0.06%, sys=5.02%, ctx=6599, 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=144728: Thu Sep 10 12:36:52 2026 read: IOPS=11, BW=46.6KiB/s (47.7kB/s)(5940KiB/127494msec) clat (usec): min=29, max=265840, avg=40428.85, stdev=31819.76 lat (usec): min=29, max=265841, avg=40431.49, stdev=31819.73 clat percentiles (usec): | 1.00th=[ 48], 5.00th=[ 59], 10.00th=[ 124], 20.00th=[ 17433], | 30.00th=[ 22676], 40.00th=[ 27657], 50.00th=[ 33424], 60.00th=[ 40109], | 70.00th=[ 50594], 80.00th=[ 61604], 90.00th=[ 80217], 95.00th=[101188], | 99.00th=[145753], 99.50th=[173016], 99.90th=[250610], 99.95th=[265290], | 99.99th=[265290] bw ( KiB/s): min= 6, max= 118, per=25.13%, avg=46.99, stdev=21.07, samples=247 iops : min= 1, max= 29, avg=11.11, stdev= 5.31, samples=247 write: IOPS=12, BW=49.8KiB/s (50.0kB/s)(6348KiB/127494msec); 0 zone resets clat (usec): min=973, max=1041.7k, avg=42254.57, stdev=51520.50 lat (usec): min=974, max=1041.7k, avg=42256.69, stdev=51520.13 clat percentiles (usec): | 1.00th=[ 1045], 5.00th=[ 1270], 10.00th=[ 1827], | 20.00th=[ 4015], 30.00th=[ 8717], 40.00th=[ 19268], | 50.00th=[ 31065], 60.00th=[ 41157], 70.00th=[ 53216], | 80.00th=[ 69731], 90.00th=[ 99091], 95.00th=[ 125305], | 99.00th=[ 212861], 99.50th=[ 263193], 99.90th=[ 425722], | 99.95th=[1044382], 99.99th=[1044382] bw ( KiB/s): min= 7, max= 118, per=25.44%, avg=49.62, stdev=20.86, samples=250 iops : min= 1, max= 29, avg=11.78, stdev= 5.27, samples=250 lat (usec) : 50=0.81%, 100=3.87%, 250=0.52%, 500=0.16%, 1000=0.16% lat (msec) : 2=5.63%, 4=4.72%, 10=6.61%, 20=10.35%, 50=35.42% lat (msec) : 100=24.35%, 250=7.03%, 500=0.33%, 2000=0.03% cpu : usr=0.07%, sys=4.84%, ctx=6501, 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=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=144729: Thu Sep 10 12:36:52 2026 read: IOPS=11, BW=46.0KiB/s (48.1kB/s)(6028KiB/128300msec) clat (usec): min=28, max=297494, avg=40832.11, stdev=32155.60 lat (usec): min=28, max=297495, avg=40835.65, stdev=32156.70 clat percentiles (usec): | 1.00th=[ 48], 5.00th=[ 60], 10.00th=[ 326], 20.00th=[ 18482], | 30.00th=[ 23200], 40.00th=[ 28443], 50.00th=[ 33817], 60.00th=[ 40109], | 70.00th=[ 49546], 80.00th=[ 61604], 90.00th=[ 79168], 95.00th=[ 99091], | 99.00th=[156238], 99.50th=[179307], 99.90th=[225444], 99.95th=[295699], | 99.99th=[295699] bw ( KiB/s): min= 7, max= 102, per=25.31%, avg=47.33, stdev=20.58, samples=248 iops : min= 1, max= 25, avg=11.20, stdev= 5.19, samples=248 write: IOPS=12, BW=48.8KiB/s (49.0kB/s)(6260KiB/128300msec); 0 zone resets clat (usec): min=931, max=1083.2k, avg=42429.86, stdev=51490.70 lat (usec): min=932, max=1083.2k, avg=42434.74, stdev=51488.72 clat percentiles (usec): | 1.00th=[ 1057], 5.00th=[ 1188], 10.00th=[ 1631], | 20.00th=[ 3687], 30.00th=[ 7570], 40.00th=[ 19530], | 50.00th=[ 30278], 60.00th=[ 41681], 70.00th=[ 56886], | 80.00th=[ 71828], 90.00th=[ 100140], 95.00th=[ 120062], | 99.00th=[ 187696], 99.50th=[ 212861], 99.90th=[ 492831], | 99.95th=[1082131], 99.99th=[1082131] bw ( KiB/s): min= 7, max= 126, per=24.73%, avg=48.22, stdev=21.91, samples=252 iops : min= 1, max= 31, avg=11.43, stdev= 5.53, samples=252 lat (usec) : 50=0.81%, 100=3.61%, 250=0.46%, 500=0.10%, 750=0.13% lat (usec) : 1000=0.29% lat (msec) : 2=5.92%, 4=4.62%, 10=6.51%, 20=9.67%, 50=35.64% lat (msec) : 100=24.67%, 250=7.32%, 500=0.20%, 2000=0.03% cpu : usr=0.07%, sys=4.96%, ctx=6564, 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=144730: Thu Sep 10 12:36:52 2026 read: IOPS=12, BW=48.6KiB/s (49.7kB/s)(6052KiB/124634msec) clat (usec): min=28, max=442541, avg=38630.30, stdev=30417.23 lat (usec): min=29, max=442543, avg=38631.67, stdev=30417.22 clat percentiles (usec): | 1.00th=[ 49], 5.00th=[ 60], 10.00th=[ 137], 20.00th=[ 17171], | 30.00th=[ 22938], 40.00th=[ 27395], 50.00th=[ 33162], 60.00th=[ 40109], | 70.00th=[ 47449], 80.00th=[ 58459], 90.00th=[ 77071], 95.00th=[ 90702], | 99.00th=[130548], 99.50th=[147850], 99.90th=[283116], 99.95th=[442500], | 99.99th=[442500] bw ( KiB/s): min= 7, max= 103, per=26.22%, avg=49.03, stdev=21.09, samples=241 iops : min= 1, max= 25, avg=11.62, stdev= 5.32, samples=241 write: IOPS=12, BW=50.0KiB/s (51.2kB/s)(6236KiB/124634msec); 0 zone resets clat (usec): min=890, max=1365.3k, avg=42195.29, stdev=54019.34 lat (usec): min=892, max=1365.3k, avg=42200.01, stdev=54020.09 clat percentiles (usec): | 1.00th=[ 1057], 5.00th=[ 1237], 10.00th=[ 1827], | 20.00th=[ 4113], 30.00th=[ 7898], 40.00th=[ 17957], | 50.00th=[ 31065], 60.00th=[ 41681], 70.00th=[ 54789], | 80.00th=[ 71828], 90.00th=[ 100140], 95.00th=[ 122160], | 99.00th=[ 189793], 99.50th=[ 200279], 99.90th=[ 291505], | 99.95th=[1367344], 99.99th=[1367344] bw ( KiB/s): min= 15, max= 126, per=25.73%, avg=50.18, stdev=19.92, samples=242 iops : min= 3, max= 31, avg=11.90, stdev= 5.01, samples=242 lat (usec) : 50=0.72%, 100=3.81%, 250=0.78%, 500=0.13%, 750=0.20% lat (usec) : 1000=0.20% lat (msec) : 2=5.70%, 4=4.49%, 10=7.00%, 20=10.12%, 50=36.33% lat (msec) : 100=24.12%, 250=6.25%, 500=0.13%, 2000=0.03% cpu : usr=0.08%, sys=4.95%, ctx=6482, 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=187KiB/s (192kB/s), 46.6KiB/s-48.6KiB/s (47.7kB/s-49.7kB/s), io=23.4MiB (24.6MB), run=124634-128300msec WRITE: bw=196KiB/s (201kB/s), 48.8KiB/s-50.0KiB/s (49.0kB/s-51.2kB/s), io=24.6MiB (25.7MB), run=124634-128300msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144722: Thu Sep 10 12:39:13 2026 read: IOPS=5, BW=22.2KiB/s (22.8kB/s)(5992KiB/269370msec) clat (msec): min=5, max=1100, avg=36.07, stdev=46.68 lat (msec): min=5, max=1100, avg=36.07, stdev=46.68 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 10], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 16], 40.00th=[ 19], 50.00th=[ 22], 60.00th=[ 27], | 70.00th=[ 34], 80.00th=[ 48], 90.00th=[ 79], 95.00th=[ 106], | 99.00th=[ 201], 99.50th=[ 239], 99.90th=[ 422], 99.95th=[ 1099], | 99.99th=[ 1099] bw ( KiB/s): min= 7, max= 95, per=27.83%, avg=24.76, stdev=17.54, samples=468 iops : min= 1, max= 23, avg= 5.58, stdev= 4.42, samples=468 write: IOPS=5, BW=23.4KiB/s (23.9kB/s)(6296KiB/269370msec); 0 zone resets clat (msec): min=37, max=674, avg=136.54, stdev=66.13 lat (msec): min=37, max=674, avg=136.54, stdev=66.13 clat percentiles (msec): | 1.00th=[ 50], 5.00th=[ 62], 10.00th=[ 71], 20.00th=[ 84], | 30.00th=[ 96], 40.00th=[ 108], 50.00th=[ 122], 60.00th=[ 138], | 70.00th=[ 157], 80.00th=[ 182], 90.00th=[ 222], 95.00th=[ 259], | 99.00th=[ 355], 99.50th=[ 451], 99.90th=[ 558], 99.95th=[ 676], | 99.99th=[ 676] bw ( KiB/s): min= 7, max= 55, per=24.74%, avg=23.01, stdev=10.90, samples=527 iops : min= 1, max= 13, avg= 5.14, stdev= 2.77, samples=527 lat (msec) : 10=3.74%, 20=17.90%, 50=18.33%, 100=23.47%, 250=33.33% lat (msec) : 500=3.09%, 750=0.10%, 2000=0.03% cpu : usr=0.04%, sys=1.11%, ctx=5145, 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=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=144723: Thu Sep 10 12:39:13 2026 read: IOPS=5, BW=22.1KiB/s (22.6kB/s)(5940KiB/268970msec) clat (msec): min=5, max=1143, avg=34.44, stdev=44.94 lat (msec): min=5, max=1143, avg=34.44, stdev=44.94 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 16], 40.00th=[ 19], 50.00th=[ 22], 60.00th=[ 27], | 70.00th=[ 33], 80.00th=[ 44], 90.00th=[ 75], 95.00th=[ 101], | 99.00th=[ 199], 99.50th=[ 230], 99.90th=[ 372], 99.95th=[ 1150], | 99.99th=[ 1150] bw ( KiB/s): min= 7, max= 88, per=27.95%, avg=24.88, stdev=16.86, samples=461 iops : min= 1, max= 22, avg= 5.61, stdev= 4.24, samples=461 write: IOPS=5, BW=23.6KiB/s (24.2kB/s)(6348KiB/268970msec); 0 zone resets clat (msec): min=39, max=747, avg=136.99, stdev=67.92 lat (msec): min=39, max=747, avg=136.99, stdev=67.92 clat percentiles (msec): | 1.00th=[ 47], 5.00th=[ 62], 10.00th=[ 69], 20.00th=[ 82], | 30.00th=[ 96], 40.00th=[ 109], 50.00th=[ 122], 60.00th=[ 138], | 70.00th=[ 157], 80.00th=[ 182], 90.00th=[ 228], 95.00th=[ 262], | 99.00th=[ 355], 99.50th=[ 393], 99.90th=[ 667], 99.95th=[ 751], | 99.99th=[ 751] bw ( KiB/s): min= 7, max= 56, per=25.10%, avg=23.34, stdev=10.89, samples=524 iops : min= 1, max= 14, avg= 5.22, stdev= 2.79, samples=524 lat (msec) : 10=3.87%, 20=17.94%, 50=19.14%, 100=22.04%, 250=33.50% lat (msec) : 500=3.42%, 750=0.07%, 2000=0.03% cpu : usr=0.04%, sys=1.10%, ctx=5136, 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=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=144724: Thu Sep 10 12:39:13 2026 read: IOPS=5, BW=22.4KiB/s (22.0kB/s)(6028KiB/268872msec) clat (msec): min=4, max=449, avg=35.75, stdev=38.58 lat (msec): min=4, max=449, avg=35.75, stdev=38.58 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 16], 40.00th=[ 19], 50.00th=[ 22], 60.00th=[ 27], | 70.00th=[ 35], 80.00th=[ 48], 90.00th=[ 82], 95.00th=[ 112], | 99.00th=[ 190], 99.50th=[ 262], 99.90th=[ 368], 99.95th=[ 451], | 99.99th=[ 451] bw ( KiB/s): min= 7, max= 119, per=27.54%, avg=24.51, stdev=17.23, samples=476 iops : min= 1, max= 29, avg= 5.54, stdev= 4.35, samples=476 write: IOPS=5, BW=23.3KiB/s (23.8kB/s)(6260KiB/268872msec); 0 zone resets clat (msec): min=37, max=1257, avg=137.13, stdev=74.22 lat (msec): min=37, max=1257, avg=137.14, stdev=74.22 clat percentiles (msec): | 1.00th=[ 50], 5.00th=[ 61], 10.00th=[ 69], 20.00th=[ 83], | 30.00th=[ 94], 40.00th=[ 106], 50.00th=[ 121], 60.00th=[ 138], | 70.00th=[ 155], 80.00th=[ 180], 90.00th=[ 228], 95.00th=[ 271], | 99.00th=[ 380], 99.50th=[ 422], 99.90th=[ 751], 99.95th=[ 1250], | 99.99th=[ 1250] bw ( KiB/s): min= 7, max= 55, per=25.01%, avg=23.26, stdev=11.01, samples=520 iops : min= 1, max= 13, avg= 5.22, stdev= 2.80, samples=520 lat (msec) : 10=3.55%, 20=18.16%, 50=18.59%, 100=23.01%, 250=32.85% lat (msec) : 500=3.68%, 750=0.13%, 2000=0.03% cpu : usr=0.04%, sys=1.10%, ctx=5209, 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=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=144726: Thu Sep 10 12:39:13 2026 read: IOPS=5, BW=22.6KiB/s (23.2kB/s)(6052KiB/267510msec) clat (msec): min=5, max=393, avg=33.19, stdev=34.25 lat (msec): min=5, max=393, avg=33.19, stdev=34.25 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 16], 40.00th=[ 19], 50.00th=[ 22], 60.00th=[ 26], | 70.00th=[ 32], 80.00th=[ 45], 90.00th=[ 74], 95.00th=[ 99], | 99.00th=[ 163], 99.50th=[ 182], 99.90th=[ 351], 99.95th=[ 393], | 99.99th=[ 393] bw ( KiB/s): min= 7, max= 111, per=29.35%, avg=26.12, stdev=17.22, samples=449 iops : min= 1, max= 27, avg= 5.94, stdev= 4.36, samples=449 write: IOPS=5, BW=23.3KiB/s (23.9kB/s)(6236KiB/267510msec); 0 zone resets clat (msec): min=38, max=1347, avg=139.14, stdev=73.11 lat (msec): min=38, max=1347, avg=139.14, stdev=73.11 clat percentiles (msec): | 1.00th=[ 50], 5.00th=[ 63], 10.00th=[ 70], 20.00th=[ 84], | 30.00th=[ 96], 40.00th=[ 110], 50.00th=[ 123], 60.00th=[ 138], | 70.00th=[ 159], 80.00th=[ 186], 90.00th=[ 230], 95.00th=[ 268], | 99.00th=[ 351], 99.50th=[ 426], 99.90th=[ 506], 99.95th=[ 1351], | 99.99th=[ 1351] bw ( KiB/s): min= 7, max= 55, per=24.64%, avg=22.92, stdev=10.81, samples=525 iops : min= 1, max= 13, avg= 5.13, stdev= 2.76, samples=525 lat (msec) : 10=3.74%, 20=19.40%, 50=18.23%, 100=22.30%, 250=32.65% lat (msec) : 500=3.61%, 750=0.03%, 2000=0.03% cpu : usr=0.04%, sys=1.07%, ctx=5179, 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=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=89.1KiB/s (91.3kB/s), 22.1KiB/s-22.6KiB/s (22.6kB/s-23.2kB/s), io=23.4MiB (24.6MB), run=267510-269370msec WRITE: bw=93.3KiB/s (95.6kB/s), 23.3KiB/s-23.6KiB/s (23.8kB/s-24.2kB/s), io=24.6MiB (25.7MB), run=267510-269370msec 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=144794: Thu Sep 10 12:40:00 2026 read: IOPS=10, BW=170KiB/s (174kB/s)(5920KiB/34769msec) clat (usec): min=29, max=417678, avg=47832.95, stdev=43842.12 lat (usec): min=30, max=417678, avg=47834.64, stdev=43841.75 clat percentiles (usec): | 1.00th=[ 36], 5.00th=[ 52], 10.00th=[ 59], 20.00th=[ 709], | 30.00th=[ 26870], 40.00th=[ 34341], 50.00th=[ 42730], 60.00th=[ 51643], | 70.00th=[ 61080], 80.00th=[ 76022], 90.00th=[ 96994], 95.00th=[115868], | 99.00th=[181404], 99.50th=[274727], 99.90th=[417334], 99.95th=[417334], | 99.99th=[417334] bw ( KiB/s): min= 31, max= 447, per=25.48%, avg=174.77, stdev=83.56, samples=66 iops : min= 1, max= 27, avg=10.15, stdev= 5.30, samples=66 write: IOPS=11, BW=183KiB/s (188kB/s)(6368KiB/34769msec); 0 zone resets clat (usec): min=1314, max=461944, avg=42721.94, stdev=54715.43 lat (usec): min=1316, max=461946, avg=42732.22, stdev=54711.52 clat percentiles (usec): | 1.00th=[ 1369], 5.00th=[ 1680], 10.00th=[ 2868], 20.00th=[ 5538], | 30.00th=[ 8717], 40.00th=[ 13829], 50.00th=[ 24511], 60.00th=[ 34341], | 70.00th=[ 50594], 80.00th=[ 66847], 90.00th=[101188], 95.00th=[160433], | 99.00th=[270533], 99.50th=[278922], 99.90th=[463471], 99.95th=[463471], | 99.99th=[463471] bw ( KiB/s): min= 31, max= 505, per=25.38%, avg=183.00, stdev=96.11, samples=68 iops : min= 1, max= 31, avg=10.66, stdev= 6.06, samples=68 lat (usec) : 50=1.69%, 100=6.77%, 250=0.91%, 750=0.26% lat (msec) : 2=4.04%, 4=4.56%, 10=9.11%, 20=9.11%, 50=27.47% lat (msec) : 100=26.56%, 250=8.46%, 500=1.04% cpu : usr=0.07%, sys=4.61%, ctx=1398, majf=0, minf=18 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=144795: Thu Sep 10 12:40:00 2026 read: IOPS=10, BW=165KiB/s (168kB/s)(5744KiB/34909msec) clat (usec): min=36, max=250879, avg=49406.35, stdev=36694.31 lat (usec): min=37, max=250880, avg=49407.62, stdev=36694.13 clat percentiles (usec): | 1.00th=[ 51], 5.00th=[ 57], 10.00th=[ 66], 20.00th=[ 22414], | 30.00th=[ 28705], 40.00th=[ 35914], 50.00th=[ 42730], 60.00th=[ 50594], | 70.00th=[ 60556], 80.00th=[ 73925], 90.00th=[102237], 95.00th=[116917], | 99.00th=[156238], 99.50th=[189793], 99.90th=[250610], 99.95th=[250610], | 99.99th=[250610] bw ( KiB/s): min= 31, max= 383, per=24.57%, avg=168.53, stdev=75.26, samples=66 iops : min= 1, max= 23, avg= 9.76, stdev= 4.71, samples=66 write: IOPS=11, BW=187KiB/s (192kB/s)(6544KiB/34909msec); 0 zone resets clat (usec): min=1359, max=277589, avg=41809.59, stdev=49072.78 lat (usec): min=1360, max=277591, avg=41841.73, stdev=49053.25 clat percentiles (usec): | 1.00th=[ 1401], 5.00th=[ 1598], 10.00th=[ 2212], 20.00th=[ 4883], | 30.00th=[ 8979], 40.00th=[ 16581], 50.00th=[ 25822], 60.00th=[ 36439], | 70.00th=[ 46400], 80.00th=[ 68682], 90.00th=[103285], 95.00th=[149947], | 99.00th=[238027], 99.50th=[240124], 99.90th=[278922], 99.95th=[278922], | 99.99th=[278922] bw ( KiB/s): min= 31, max= 670, per=25.79%, avg=185.93, stdev=101.99, samples=68 iops : min= 1, max= 41, avg=10.87, stdev= 6.43, samples=68 lat (usec) : 50=0.26%, 100=5.34%, 250=0.26% lat (msec) : 2=5.08%, 4=4.04%, 10=7.55%, 20=7.81%, 50=35.16% lat (msec) : 100=24.09%, 250=10.03%, 500=0.39% cpu : usr=0.06%, sys=4.53%, ctx=1465, 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=144796: Thu Sep 10 12:40:00 2026 read: IOPS=11, BW=183KiB/s (188kB/s)(6256KiB/34099msec) clat (usec): min=38, max=375948, avg=49833.50, stdev=42952.32 lat (usec): min=38, max=375949, avg=49851.18, stdev=42969.30 clat percentiles (usec): | 1.00th=[ 42], 5.00th=[ 56], 10.00th=[ 62], 20.00th=[ 19268], | 30.00th=[ 28181], 40.00th=[ 35390], 50.00th=[ 42206], 60.00th=[ 51119], | 70.00th=[ 62653], 80.00th=[ 79168], 90.00th=[ 98042], 95.00th=[122160], | 99.00th=[187696], 99.50th=[270533], 99.90th=[375391], 99.95th=[375391], | 99.99th=[375391] bw ( KiB/s): min= 31, max= 478, per=26.62%, avg=182.62, stdev=77.25, samples=66 iops : min= 1, max= 29, avg=10.65, stdev= 4.90, samples=66 write: IOPS=11, BW=177KiB/s (181kB/s)(6032KiB/34099msec); 0 zone resets clat (usec): min=1339, max=360339, avg=38607.25, stdev=44863.84 lat (usec): min=1340, max=360341, avg=38609.21, stdev=44863.93 clat percentiles (usec): | 1.00th=[ 1385], 5.00th=[ 1680], 10.00th=[ 2114], 20.00th=[ 5473], | 30.00th=[ 8225], 40.00th=[ 15270], 50.00th=[ 23725], 60.00th=[ 35914], | 70.00th=[ 50594], 80.00th=[ 65799], 90.00th=[ 87557], 95.00th=[111674], | 99.00th=[254804], 99.50th=[295699], 99.90th=[358613], 99.95th=[358613], | 99.99th=[358613] bw ( KiB/s): min= 30, max= 349, per=24.11%, avg=173.85, stdev=80.05, samples=66 iops : min= 1, max= 21, avg=10.11, stdev= 5.12, samples=66 lat (usec) : 50=1.30%, 100=6.12%, 250=1.04%, 500=0.13% lat (msec) : 2=4.56%, 4=3.39%, 10=8.20%, 20=8.72%, 50=30.21% lat (msec) : 100=27.47%, 250=8.07%, 500=0.78% cpu : usr=0.05%, sys=4.43%, ctx=1421, 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=144797: Thu Sep 10 12:40:00 2026 read: IOPS=11, BW=179KiB/s (184kB/s)(6032KiB/33621msec) clat (usec): min=38, max=314084, avg=47680.29, stdev=39923.59 lat (usec): min=38, max=314085, avg=47684.92, stdev=39919.77 clat percentiles (usec): | 1.00th=[ 44], 5.00th=[ 57], 10.00th=[ 64], 20.00th=[ 14615], | 30.00th=[ 26608], 40.00th=[ 35390], 50.00th=[ 42206], 60.00th=[ 50594], | 70.00th=[ 62129], 80.00th=[ 74974], 90.00th=[ 92799], 95.00th=[117965], | 99.00th=[166724], 99.50th=[274727], 99.90th=[312476], 99.95th=[312476], | 99.99th=[312476] bw ( KiB/s): min= 30, max= 444, per=25.93%, avg=177.91, stdev=88.64, samples=65 iops : min= 1, max= 27, avg=10.34, stdev= 5.60, samples=65 write: IOPS=11, BW=186KiB/s (191kB/s)(6256KiB/33621msec); 0 zone resets clat (usec): min=1261, max=437339, avg=39862.26, stdev=50325.28 lat (usec): min=1262, max=437339, avg=39864.13, stdev=50325.20 clat percentiles (usec): | 1.00th=[ 1401], 5.00th=[ 1696], 10.00th=[ 2245], 20.00th=[ 5145], | 30.00th=[ 7767], 40.00th=[ 12911], 50.00th=[ 22152], 60.00th=[ 34866], | 70.00th=[ 48497], 80.00th=[ 67634], 90.00th=[ 95945], 95.00th=[132645], | 99.00th=[233833], 99.50th=[425722], 99.90th=[438305], 99.95th=[438305], | 99.99th=[438305] bw ( KiB/s): min= 30, max= 441, per=25.58%, avg=184.40, stdev=94.14, samples=65 iops : min= 1, max= 27, avg=10.75, stdev= 5.96, samples=65 lat (usec) : 50=1.17%, 100=7.16%, 250=0.13%, 500=0.26%, 750=0.13% lat (msec) : 2=4.30%, 4=4.69%, 10=8.98%, 20=8.98%, 50=29.95% lat (msec) : 100=25.65%, 250=7.94%, 500=0.65% cpu : usr=0.07%, sys=4.49%, ctx=1374, 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=686KiB/s (703kB/s), 165KiB/s-183KiB/s (168kB/s-188kB/s), io=23.4MiB (24.5MB), run=33621-34909msec WRITE: bw=722KiB/s (739kB/s), 177KiB/s-187KiB/s (181kB/s-192kB/s), io=24.6MiB (25.8MB), run=33621-34909msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144789: Thu Sep 10 12:40:47 2026 read: IOPS=4, BW=72.1KiB/s (73.8kB/s)(5920KiB/82161msec) clat (msec): min=7, max=325, avg=39.90, stdev=39.87 lat (msec): min=7, max=325, avg=39.90, stdev=39.87 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 13], 10.00th=[ 14], 20.00th=[ 17], | 30.00th=[ 20], 40.00th=[ 23], 50.00th=[ 27], 60.00th=[ 32], | 70.00th=[ 40], 80.00th=[ 53], 90.00th=[ 80], 95.00th=[ 117], | 99.00th=[ 222], 99.50th=[ 251], 99.90th=[ 326], 99.95th=[ 326], | 99.99th=[ 326] bw ( KiB/s): min= 29, max= 347, per=30.04%, avg=86.51, stdev=57.88, samples=134 iops : min= 1, max= 21, avg= 4.63, stdev= 3.67, samples=134 write: IOPS=4, BW=77.5KiB/s (79.4kB/s)(6368KiB/82161msec); 0 zone resets clat (msec): min=44, max=550, avg=168.86, stdev=80.67 lat (msec): min=44, max=550, avg=168.86, stdev=80.67 clat percentiles (msec): | 1.00th=[ 62], 5.00th=[ 79], 10.00th=[ 91], 20.00th=[ 106], | 30.00th=[ 124], 40.00th=[ 134], 50.00th=[ 150], 60.00th=[ 169], | 70.00th=[ 188], 80.00th=[ 218], 90.00th=[ 271], 95.00th=[ 326], | 99.00th=[ 514], 99.50th=[ 518], 99.90th=[ 550], 99.95th=[ 550], | 99.99th=[ 550] bw ( KiB/s): min= 30, max= 158, per=26.28%, avg=79.64, stdev=32.02, samples=157 iops : min= 1, max= 9, avg= 4.20, stdev= 2.09, samples=157 lat (msec) : 10=0.78%, 20=14.84%, 50=22.40%, 100=14.71%, 250=40.76% lat (msec) : 500=5.99%, 750=0.52% cpu : usr=0.03%, sys=0.93%, ctx=1273, 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=144790: Thu Sep 10 12:40:47 2026 read: IOPS=4, BW=69.1KiB/s (70.8kB/s)(5744KiB/83090msec) clat (msec): min=6, max=350, avg=41.64, stdev=46.36 lat (msec): min=6, max=350, avg=41.64, stdev=46.36 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 20], 40.00th=[ 23], 50.00th=[ 27], 60.00th=[ 33], | 70.00th=[ 40], 80.00th=[ 54], 90.00th=[ 84], 95.00th=[ 117], | 99.00th=[ 257], 99.50th=[ 288], 99.90th=[ 351], 99.95th=[ 351], | 99.99th=[ 351] bw ( KiB/s): min= 22, max= 287, per=31.01%, avg=89.32, stdev=56.94, samples=127 iops : min= 1, max= 17, avg= 4.82, stdev= 3.60, samples=127 write: IOPS=4, BW=78.8KiB/s (80.6kB/s)(6544KiB/83090msec); 0 zone resets clat (msec): min=53, max=777, avg=165.97, stdev=89.62 lat (msec): min=53, max=777, avg=165.97, stdev=89.62 clat percentiles (msec): | 1.00th=[ 61], 5.00th=[ 75], 10.00th=[ 86], 20.00th=[ 103], | 30.00th=[ 115], 40.00th=[ 131], 50.00th=[ 146], 60.00th=[ 165], | 70.00th=[ 186], 80.00th=[ 213], 90.00th=[ 259], 95.00th=[ 326], | 99.00th=[ 498], 99.50th=[ 531], 99.90th=[ 776], 99.95th=[ 776], | 99.99th=[ 776] bw ( KiB/s): min= 30, max= 160, per=26.67%, avg=80.82, stdev=36.17, samples=159 iops : min= 1, max= 10, avg= 4.27, stdev= 2.35, samples=159 lat (msec) : 10=1.43%, 20=13.54%, 50=21.74%, 100=16.93%, 250=39.71% lat (msec) : 500=6.12%, 750=0.39%, 1000=0.13% cpu : usr=0.03%, sys=1.00%, ctx=1240, 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=144791: Thu Sep 10 12:40:47 2026 read: IOPS=4, BW=77.5KiB/s (79.3kB/s)(6256KiB/80762msec) clat (msec): min=7, max=325, avg=40.60, stdev=40.51 lat (msec): min=7, max=325, avg=40.60, stdev=40.51 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 21], 40.00th=[ 24], 50.00th=[ 28], 60.00th=[ 32], | 70.00th=[ 40], 80.00th=[ 53], 90.00th=[ 85], 95.00th=[ 120], | 99.00th=[ 220], 99.50th=[ 257], 99.90th=[ 326], 99.95th=[ 326], | 99.99th=[ 326] bw ( KiB/s): min= 30, max= 319, per=31.43%, avg=90.52, stdev=63.47, samples=136 iops : min= 1, max= 19, avg= 4.89, stdev= 4.03, samples=136 write: IOPS=4, BW=74.7KiB/s (76.5kB/s)(6032KiB/80762msec); 0 zone resets clat (msec): min=47, max=560, avg=171.92, stdev=84.98 lat (msec): min=47, max=560, avg=171.92, stdev=84.98 clat percentiles (msec): | 1.00th=[ 62], 5.00th=[ 83], 10.00th=[ 95], 20.00th=[ 108], | 30.00th=[ 122], 40.00th=[ 136], 50.00th=[ 148], 60.00th=[ 165], | 70.00th=[ 192], 80.00th=[ 220], 90.00th=[ 284], 95.00th=[ 347], | 99.00th=[ 493], 99.50th=[ 535], 99.90th=[ 558], 99.95th=[ 558], | 99.99th=[ 558] bw ( KiB/s): min= 30, max= 159, per=24.93%, avg=75.55, stdev=32.83, samples=156 iops : min= 1, max= 9, avg= 3.94, stdev= 2.19, samples=156 lat (msec) : 10=1.43%, 20=13.28%, 50=25.52%, 100=14.06%, 250=38.15% lat (msec) : 500=7.16%, 750=0.39% cpu : usr=0.03%, sys=1.01%, ctx=1323, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144792: Thu Sep 10 12:40:47 2026 read: IOPS=4, BW=73.1KiB/s (74.9kB/s)(6032KiB/82476msec) clat (msec): min=7, max=325, avg=45.72, stdev=47.33 lat (msec): min=7, max=325, avg=45.72, stdev=47.33 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=[ 45], 80.00th=[ 58], 90.00th=[ 96], 95.00th=[ 163], | 99.00th=[ 253], 99.50th=[ 279], 99.90th=[ 326], 99.95th=[ 326], | 99.99th=[ 326] bw ( KiB/s): min= 30, max= 287, per=28.40%, avg=81.80, stdev=56.83, samples=143 iops : min= 1, max= 17, avg= 4.35, stdev= 3.57, samples=143 write: IOPS=4, BW=75.9KiB/s (77.7kB/s)(6256KiB/82476msec); 0 zone resets clat (msec): min=48, max=672, avg=166.34, stdev=83.62 lat (msec): min=48, max=672, avg=166.35, stdev=83.63 clat percentiles (msec): | 1.00th=[ 56], 5.00th=[ 80], 10.00th=[ 88], 20.00th=[ 106], | 30.00th=[ 118], 40.00th=[ 132], 50.00th=[ 144], 60.00th=[ 163], | 70.00th=[ 184], 80.00th=[ 209], 90.00th=[ 262], 95.00th=[ 330], | 99.00th=[ 535], 99.50th=[ 567], 99.90th=[ 676], 99.95th=[ 676], | 99.99th=[ 676] bw ( KiB/s): min= 30, max= 160, per=25.42%, avg=77.03, stdev=34.96, samples=158 iops : min= 1, max= 10, avg= 4.03, stdev= 2.29, samples=158 lat (msec) : 10=1.56%, 20=11.46%, 50=23.96%, 100=15.49%, 250=41.02% lat (msec) : 500=5.86%, 750=0.65% cpu : usr=0.03%, sys=1.08%, ctx=1348, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=288KiB/s (295kB/s), 69.1KiB/s-77.5KiB/s (70.8kB/s-79.3kB/s), io=23.4MiB (24.5MB), run=80762-83090msec WRITE: bw=303KiB/s (311kB/s), 74.7KiB/s-78.8KiB/s (76.5kB/s-80.6kB/s), io=24.6MiB (25.8MB), run=80762-83090msec 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=144820: Thu Sep 10 12:41:02 2026 read: IOPS=1, BW=1127KiB/s (1154kB/s)(7168KiB/6360msec) clat (usec): min=458, max=3136.1k, avg=587023.62, stdev=1126671.09 lat (usec): min=459, max=3136.1k, avg=587024.83, stdev=1126671.35 clat percentiles (usec): | 1.00th=[ 457], 5.00th=[ 457], 10.00th=[ 457], | 20.00th=[ 170918], 30.00th=[ 175113], 40.00th=[ 175113], | 50.00th=[ 179307], 60.00th=[ 202376], 70.00th=[ 202376], | 80.00th=[ 246416], 90.00th=[3137340], 95.00th=[3137340], | 99.00th=[3137340], 99.50th=[3137340], 99.90th=[3137340], | 99.95th=[3137340], 99.99th=[3137340] bw ( KiB/s): min= 1868, max= 4055, per=100.00%, avg=2977.50, stdev=1196.08, samples=4 iops : min= 1, max= 3, avg= 2.00, stdev= 1.15, samples=4 write: IOPS=0, BW=805KiB/s (824kB/s)(5120KiB/6360msec); 0 zone resets clat (msec): min=225, max=582, avg=393.04, stdev=164.27 lat (msec): min=225, max=582, avg=393.58, stdev=164.59 clat percentiles (msec): | 1.00th=[ 226], 5.00th=[ 226], 10.00th=[ 226], 20.00th=[ 226], | 30.00th=[ 259], 40.00th=[ 259], 50.00th=[ 351], 60.00th=[ 351], | 70.00th=[ 550], 80.00th=[ 550], 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= 1868, max= 2043, per=47.83%, avg=1985.25, stdev=79.88, samples=4 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=4 lat (usec) : 500=8.33% lat (msec) : 250=50.00%, 500=16.67%, 750=16.67%, >=2000=8.33% cpu : usr=0.00%, sys=9.28%, ctx=693, 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=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=144821: Thu Sep 10 12:41:02 2026 read: IOPS=0, BW=297KiB/s (304kB/s)(2048KiB/6906msec) clat (usec): min=889, max=2682.7k, avg=1341812.25, stdev=1896351.26 lat (usec): min=890, max=2682.7k, avg=1341813.99, stdev=1896351.66 clat percentiles (usec): | 1.00th=[ 889], 5.00th=[ 889], 10.00th=[ 889], | 20.00th=[ 889], 30.00th=[ 889], 40.00th=[ 889], | 50.00th=[ 889], 60.00th=[2667578], 70.00th=[2667578], | 80.00th=[2667578], 90.00th=[2667578], 95.00th=[2667578], | 99.00th=[2667578], 99.50th=[2667578], 99.90th=[2667578], | 99.95th=[2667578], 99.99th=[2667578] bw ( KiB/s): min= 2003, max= 2039, per=68.16%, avg=2021.00, stdev=25.46, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1483KiB/s (1518kB/s)(10.0MiB/6906msec); 0 zone resets clat (msec): min=77, max=1148, avg=416.64, stdev=319.38 lat (msec): min=77, max=1148, avg=417.16, stdev=318.98 clat percentiles (msec): | 1.00th=[ 79], 5.00th=[ 79], 10.00th=[ 79], 20.00th=[ 127], | 30.00th=[ 153], 40.00th=[ 305], 50.00th=[ 359], 60.00th=[ 388], | 70.00th=[ 405], 80.00th=[ 481], 90.00th=[ 726], 95.00th=[ 1150], | 99.00th=[ 1150], 99.50th=[ 1150], 99.90th=[ 1150], 99.95th=[ 1150], | 99.99th=[ 1150] bw ( KiB/s): min= 1868, max= 6095, per=72.53%, avg=3010.67, stdev=1732.88, samples=6 iops : min= 1, max= 5, avg= 2.00, stdev= 1.67, samples=6 lat (usec) : 1000=8.33% lat (msec) : 100=8.33%, 250=16.67%, 500=41.67%, 750=8.33%, 2000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=9.43%, ctx=498, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=2,10,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144822: Thu Sep 10 12:41:02 2026 read: IOPS=0, BW=1007KiB/s (1031kB/s)(6144KiB/6102msec) clat (usec): min=482, max=242902, avg=51926.76, stdev=96915.17 lat (usec): min=483, max=242903, avg=51927.82, stdev=96915.17 clat percentiles (usec): | 1.00th=[ 482], 5.00th=[ 482], 10.00th=[ 482], 20.00th=[ 545], | 30.00th=[ 545], 40.00th=[ 685], 50.00th=[ 685], 60.00th=[ 2671], | 70.00th=[ 64226], 80.00th=[ 64226], 90.00th=[242222], 95.00th=[242222], | 99.00th=[242222], 99.50th=[242222], 99.90th=[242222], 99.95th=[242222], | 99.99th=[242222] bw ( KiB/s): min= 8175, max= 8175, per=100.00%, avg=8175.00, stdev= 0.00, samples=1 iops : min= 7, max= 7, avg= 7.00, stdev= 0.00, samples=1 write: IOPS=0, BW=1007KiB/s (1031kB/s)(6144KiB/6102msec); 0 zone resets clat (msec): min=204, max=3707, avg=909.18, stdev=1377.92 lat (msec): min=204, max=3707, avg=909.25, stdev=1377.92 clat percentiles (msec): | 1.00th=[ 205], 5.00th=[ 205], 10.00th=[ 205], 20.00th=[ 226], | 30.00th=[ 226], 40.00th=[ 313], 50.00th=[ 313], 60.00th=[ 422], | 70.00th=[ 584], 80.00th=[ 584], 90.00th=[ 3708], 95.00th=[ 3708], | 99.00th=[ 3708], 99.50th=[ 3708], 99.90th=[ 3708], 99.95th=[ 3708], | 99.99th=[ 3708] bw ( KiB/s): min= 4063, max= 4087, per=98.17%, avg=4075.00, stdev=16.97, samples=2 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=2 lat (usec) : 500=8.33%, 750=16.67% lat (msec) : 4=8.33%, 100=8.33%, 250=25.00%, 500=16.67%, 750=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=6.70%, ctx=111, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=6,6,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144823: Thu Sep 10 12:41:02 2026 read: IOPS=0, BW=870KiB/s (891kB/s)(5120KiB/5886msec) clat (usec): min=451, max=255391, avg=67665.62, stdev=110183.86 lat (usec): min=452, max=255392, avg=67666.60, stdev=110183.65 clat percentiles (usec): | 1.00th=[ 453], 5.00th=[ 453], 10.00th=[ 453], 20.00th=[ 453], | 30.00th=[ 979], 40.00th=[ 979], 50.00th=[ 2638], 60.00th=[ 2638], | 70.00th=[ 79168], 80.00th=[ 79168], 90.00th=[254804], 95.00th=[254804], | 99.00th=[254804], 99.50th=[254804], 99.90th=[254804], 99.95th=[254804], | 99.99th=[254804] bw ( KiB/s): min= 8175, max= 8175, per=100.00%, avg=8175.00, stdev= 0.00, samples=1 iops : min= 7, max= 7, avg= 7.00, stdev= 0.00, samples=1 write: IOPS=1, BW=1218KiB/s (1247kB/s)(7168KiB/5886msec); 0 zone resets clat (msec): min=185, max=3585, avg=751.69, stdev=1251.69 lat (msec): min=186, max=3585, avg=751.96, stdev=1251.59 clat percentiles (msec): | 1.00th=[ 186], 5.00th=[ 186], 10.00th=[ 186], 20.00th=[ 230], | 30.00th=[ 234], 40.00th=[ 234], 50.00th=[ 284], 60.00th=[ 355], | 70.00th=[ 355], 80.00th=[ 393], 90.00th=[ 3574], 95.00th=[ 3574], | 99.00th=[ 3574], 99.50th=[ 3574], 99.90th=[ 3574], 99.95th=[ 3574], | 99.99th=[ 3574] bw ( KiB/s): min= 2031, max= 4055, per=73.09%, avg=3034.00, stdev=1151.41, samples=4 iops : min= 1, max= 3, avg= 2.00, stdev= 1.15, samples=4 lat (usec) : 500=8.33%, 1000=8.33% lat (msec) : 4=8.33%, 100=8.33%, 250=25.00%, 500=33.33%, >=2000=8.33% cpu : usr=0.00%, sys=7.88%, ctx=134, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=5,7,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=2966KiB/s (3037kB/s), 297KiB/s-1127KiB/s (304kB/s-1154kB/s), io=20.0MiB (20.0MB), run=5886-6906msec WRITE: bw=4152KiB/s (4251kB/s), 805KiB/s-1483KiB/s (824kB/s-1518kB/s), io=28.0MiB (29.4MB), run=5886-6906msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144816: Thu Sep 10 12:41:03 2026 read: IOPS=1, BW=1216KiB/s (1245kB/s)(7168KiB/5896msec) clat (msec): min=96, max=763, avg=280.15, stdev=225.59 lat (msec): min=96, max=763, avg=280.15, stdev=225.59 clat percentiles (msec): | 1.00th=[ 96], 5.00th=[ 96], 10.00th=[ 96], 20.00th=[ 130], | 30.00th=[ 180], 40.00th=[ 180], 50.00th=[ 215], 60.00th=[ 279], | 70.00th=[ 279], 80.00th=[ 296], 90.00th=[ 768], 95.00th=[ 768], | 99.00th=[ 768], 99.50th=[ 768], 99.90th=[ 768], 99.95th=[ 768], | 99.99th=[ 768] bw ( KiB/s): min= 2035, max= 4047, per=100.00%, avg=2982.25, stdev=1091.01, samples=4 iops : min= 1, max= 3, avg= 2.25, stdev= 0.96, samples=4 write: IOPS=0, BW=868KiB/s (889kB/s)(5120KiB/5896msec); 0 zone resets clat (msec): min=210, max=2341, avg=753.78, stdev=896.30 lat (msec): min=210, max=2342, avg=753.87, stdev=896.30 clat percentiles (msec): | 1.00th=[ 211], 5.00th=[ 211], 10.00th=[ 211], 20.00th=[ 211], | 30.00th=[ 300], 40.00th=[ 300], 50.00th=[ 376], 60.00th=[ 376], | 70.00th=[ 542], 80.00th=[ 542], 90.00th=[ 2333], 95.00th=[ 2333], | 99.00th=[ 2333], 99.50th=[ 2333], 99.90th=[ 2333], 99.95th=[ 2333], | 99.99th=[ 2333] bw ( KiB/s): min= 2039, max= 2048, per=57.74%, avg=2042.25, stdev= 4.27, samples=4 iops : min= 1, max= 2, avg= 1.25, stdev= 0.50, 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=2.77%, ctx=74, 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=144817: Thu Sep 10 12:41:03 2026 read: IOPS=0, BW=258KiB/s (264kB/s)(2048KiB/7953msec) clat (msec): min=215, max=2777, avg=1496.43, stdev=1811.14 lat (msec): min=215, max=2777, avg=1496.44, stdev=1811.15 clat percentiles (msec): | 1.00th=[ 215], 5.00th=[ 215], 10.00th=[ 215], 20.00th=[ 215], | 30.00th=[ 215], 40.00th=[ 215], 50.00th=[ 215], 60.00th=[ 2769], | 70.00th=[ 2769], 80.00th=[ 2769], 90.00th=[ 2769], 95.00th=[ 2769], | 99.00th=[ 2769], 99.50th=[ 2769], 99.90th=[ 2769], 99.95th=[ 2769], | 99.99th=[ 2769] bw ( KiB/s): min= 2043, max= 2048, per=80.98%, avg=2045.50, stdev= 3.54, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 write: IOPS=1, BW=1288KiB/s (1318kB/s)(10.0MiB/7953msec); 0 zone resets clat (msec): min=171, max=1369, avg=483.23, stdev=357.35 lat (msec): min=171, max=1369, avg=483.44, stdev=357.35 clat percentiles (msec): | 1.00th=[ 171], 5.00th=[ 171], 10.00th=[ 171], 20.00th=[ 184], | 30.00th=[ 239], 40.00th=[ 342], 50.00th=[ 355], 60.00th=[ 380], | 70.00th=[ 472], 80.00th=[ 609], 90.00th=[ 718], 95.00th=[ 1368], | 99.00th=[ 1368], 99.50th=[ 1368], 99.90th=[ 1368], 99.95th=[ 1368], | 99.99th=[ 1368] bw ( KiB/s): min= 2007, max= 4096, per=76.77%, avg=2715.33, stdev=1056.82, samples=6 iops : min= 1, max= 4, avg= 2.00, stdev= 1.26, samples=6 lat (msec) : 250=33.33%, 500=33.33%, 750=16.67%, 2000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=2.43%, ctx=81, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=2,10,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144818: Thu Sep 10 12:41:03 2026 read: IOPS=0, BW=842KiB/s (862kB/s)(6144KiB/7296msec) clat (msec): min=91, max=836, avg=327.43, stdev=320.70 lat (msec): min=91, max=836, avg=327.43, stdev=320.70 clat percentiles (msec): | 1.00th=[ 92], 5.00th=[ 92], 10.00th=[ 92], 20.00th=[ 107], | 30.00th=[ 107], 40.00th=[ 114], 50.00th=[ 114], 60.00th=[ 192], | 70.00th=[ 625], 80.00th=[ 625], 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= 2039, max= 4015, per=100.00%, avg=2537.50, stdev=985.01, samples=4 iops : min= 1, max= 3, avg= 2.00, stdev= 0.82, samples=4 write: IOPS=0, BW=842KiB/s (862kB/s)(6144KiB/7296msec); 0 zone resets clat (msec): min=124, max=3613, avg=867.23, stdev=1353.46 lat (msec): min=124, max=3613, avg=867.31, stdev=1353.45 clat percentiles (msec): | 1.00th=[ 125], 5.00th=[ 125], 10.00th=[ 125], 20.00th=[ 232], | 30.00th=[ 232], 40.00th=[ 288], 50.00th=[ 288], 60.00th=[ 401], | 70.00th=[ 550], 80.00th=[ 550], 90.00th=[ 3608], 95.00th=[ 3608], | 99.00th=[ 3608], 99.50th=[ 3608], 99.90th=[ 3608], 99.95th=[ 3608], | 99.99th=[ 3608] bw ( KiB/s): min= 1861, max= 2048, per=56.49%, avg=1998.00, stdev=78.10, samples=5 iops : min= 1, max= 2, avg= 1.20, stdev= 0.45, samples=5 lat (msec) : 100=8.33%, 250=41.67%, 500=16.67%, 750=16.67%, 1000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=2.37%, ctx=96, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=6,6,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144819: Thu Sep 10 12:41:03 2026 read: IOPS=0, BW=632KiB/s (647kB/s)(5120KiB/8106msec) clat (msec): min=137, max=540, avg=346.84, stdev=148.58 lat (msec): min=137, max=540, avg=346.84, stdev=148.58 clat percentiles (msec): | 1.00th=[ 138], 5.00th=[ 138], 10.00th=[ 138], 20.00th=[ 138], | 30.00th=[ 296], 40.00th=[ 296], 50.00th=[ 347], 60.00th=[ 347], | 70.00th=[ 414], 80.00th=[ 414], 90.00th=[ 542], 95.00th=[ 542], | 99.00th=[ 542], 99.50th=[ 542], 99.90th=[ 542], 99.95th=[ 542], | 99.99th=[ 542] bw ( KiB/s): min= 2007, max= 4096, per=100.00%, avg=2711.33, stdev=1199.22, samples=3 iops : min= 1, max= 4, avg= 2.00, stdev= 1.73, samples=3 write: IOPS=0, BW=884KiB/s (906kB/s)(7168KiB/8106msec); 0 zone resets clat (msec): min=156, max=3612, avg=907.02, stdev=1225.28 lat (msec): min=156, max=3612, avg=907.11, stdev=1225.28 clat percentiles (msec): | 1.00th=[ 157], 5.00th=[ 157], 10.00th=[ 157], 20.00th=[ 199], | 30.00th=[ 313], 40.00th=[ 313], 50.00th=[ 401], 60.00th=[ 835], | 70.00th=[ 835], 80.00th=[ 835], 90.00th=[ 3608], 95.00th=[ 3608], | 99.00th=[ 3608], 99.50th=[ 3608], 99.90th=[ 3608], 99.95th=[ 3608], | 99.99th=[ 3608] bw ( KiB/s): min= 1917, max= 4096, per=66.69%, avg=2359.00, stdev=852.31, samples=6 iops : min= 1, max= 4, avg= 1.67, stdev= 1.21, samples=6 lat (msec) : 250=25.00%, 500=41.67%, 750=8.33%, 1000=16.67%, >=2000=8.33% cpu : usr=0.01%, sys=2.34%, ctx=113, 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=2527KiB/s (2587kB/s), 258KiB/s-1216KiB/s (264kB/s-1245kB/s), io=20.0MiB (20.0MB), run=5896-8106msec WRITE: bw=3537KiB/s (3622kB/s), 842KiB/s-1288KiB/s (862kB/s-1318kB/s), io=28.0MiB (29.4MB), run=5896-8106msec 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=144831: Thu Sep 10 12:41:18 2026 read: IOPS=0, BW=3089KiB/s (3163kB/s)(12.0MiB/3978msec) clat (msec): min=1078, max=1645, avg=1306.36, stdev=299.23 lat (msec): min=1078, max=1645, avg=1306.36, stdev=299.23 clat percentiles (msec): | 1.00th=[ 1083], 5.00th=[ 1083], 10.00th=[ 1083], 20.00th=[ 1083], | 30.00th=[ 1083], 40.00th=[ 1200], 50.00th=[ 1200], 60.00th=[ 1200], | 70.00th=[ 1653], 80.00th=[ 1653], 90.00th=[ 1653], 95.00th=[ 1653], | 99.00th=[ 1653], 99.50th=[ 1653], 99.90th=[ 1653], 99.95th=[ 1653], | 99.99th=[ 1653] bw ( KiB/s): min= 7684, max= 8192, per=100.00%, avg=7938.00, stdev=359.21, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 2000=100.00% cpu : usr=0.00%, sys=3.37%, ctx=60, 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=144832: Thu Sep 10 12:41:18 2026 read: IOPS=0, BW=1239KiB/s (1268kB/s)(4096KiB/3307msec) clat (nsec): min=227029k, max=227029k, avg=227028825.00, stdev= 0.00 lat (nsec): min=227031k, max=227031k, avg=227031167.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 228], 5.00th=[ 228], 10.00th=[ 228], 20.00th=[ 228], | 30.00th=[ 228], 40.00th=[ 228], 50.00th=[ 228], 60.00th=[ 228], | 70.00th=[ 228], 80.00th=[ 228], 90.00th=[ 228], 95.00th=[ 228], | 99.00th=[ 228], 99.50th=[ 228], 99.90th=[ 228], 99.95th=[ 228], | 99.99th=[ 228] bw ( KiB/s): min= 7366, max= 7366, per=100.00%, avg=7366.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2477KiB/s (2537kB/s)(8192KiB/3307msec); 0 zone resets clat (msec): min=1211, max=1785, avg=1498.45, stdev=406.10 lat (msec): min=1211, max=1785, avg=1498.77, stdev=406.11 clat percentiles (msec): | 1.00th=[ 1217], 5.00th=[ 1217], 10.00th=[ 1217], 20.00th=[ 1217], | 30.00th=[ 1217], 40.00th=[ 1217], 50.00th=[ 1217], 60.00th=[ 1787], | 70.00th=[ 1787], 80.00th=[ 1787], 90.00th=[ 1787], 95.00th=[ 1787], | 99.00th=[ 1787], 99.50th=[ 1787], 99.90th=[ 1787], 99.95th=[ 1787], | 99.99th=[ 1787] bw ( KiB/s): min= 8110, max= 8110, per=83.24%, avg=8110.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 250=33.33%, 2000=66.67% cpu : usr=0.00%, sys=2.99%, ctx=32, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1,2,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144833: Thu Sep 10 12:41:18 2026 write: IOPS=0, BW=3654KiB/s (3742kB/s)(12.0MiB/3363msec); 0 zone resets clat (msec): min=676, max=1398, avg=1096.95, stdev=375.65 lat (msec): min=676, max=1399, avg=1097.63, stdev=375.70 clat percentiles (msec): | 1.00th=[ 676], 5.00th=[ 676], 10.00th=[ 676], 20.00th=[ 676], | 30.00th=[ 676], 40.00th=[ 1217], 50.00th=[ 1217], 60.00th=[ 1217], | 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= 8031, max= 8062, per=82.59%, avg=8046.50, stdev=21.92, 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=2.47%, ctx=45, 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=144834: Thu Sep 10 12:41:18 2026 write: IOPS=1, BW=5948KiB/s (6090kB/s)(12.0MiB/2066msec); 0 zone resets clat (msec): min=564, max=779, avg=655.06, stdev=111.47 lat (msec): min=564, max=779, avg=655.44, stdev=111.40 clat percentiles (msec): | 1.00th=[ 567], 5.00th=[ 567], 10.00th=[ 567], 20.00th=[ 567], | 30.00th=[ 567], 40.00th=[ 625], 50.00th=[ 625], 60.00th=[ 625], | 70.00th=[ 776], 80.00th=[ 776], 90.00th=[ 776], 95.00th=[ 776], | 99.00th=[ 776], 99.50th=[ 776], 99.90th=[ 776], 99.95th=[ 776], | 99.99th=[ 776] bw ( KiB/s): min= 7684, max= 8031, per=80.65%, avg=7857.50, stdev=245.37, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=66.67%, 1000=33.33% cpu : usr=0.00%, sys=5.96%, ctx=63, 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=4119KiB/s (4218kB/s), 1239KiB/s-3089KiB/s (1268kB/s-3163kB/s), io=16.0MiB (16.8MB), run=3307-3978msec WRITE: bw=9744KiB/s (9978kB/s), 2477KiB/s-5948KiB/s (2537kB/s-6090kB/s), io=32.0MiB (33.6MB), run=2066-3363msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144836: Thu Sep 10 12:41:22 2026 read: IOPS=0, BW=2338KiB/s (2394kB/s)(12.0MiB/5255msec) clat (msec): min=1647, max=1811, avg=1749.35, stdev=88.87 lat (msec): min=1647, max=1811, avg=1749.35, stdev=88.87 clat percentiles (msec): | 1.00th=[ 1653], 5.00th=[ 1653], 10.00th=[ 1653], 20.00th=[ 1653], | 30.00th=[ 1653], 40.00th=[ 1787], 50.00th=[ 1787], 60.00th=[ 1787], | 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= 7801, max= 8078, per=100.00%, avg=7939.50, stdev=195.87, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 2000=100.00% cpu : usr=0.02%, sys=6.60%, ctx=209, 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=144837: Thu Sep 10 12:41:22 2026 read: IOPS=0, BW=849KiB/s (870kB/s)(4096KiB/4823msec) clat (nsec): min=1554.3M, max=1554.3M, avg=1554285209.00, stdev= 0.00 lat (nsec): min=1554.3M, max=1554.3M, avg=1554286425.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1552], 5.00th=[ 1552], 10.00th=[ 1552], 20.00th=[ 1552], | 30.00th=[ 1552], 40.00th=[ 1552], 50.00th=[ 1552], 60.00th=[ 1552], | 70.00th=[ 1552], 80.00th=[ 1552], 90.00th=[ 1552], 95.00th=[ 1552], | 99.00th=[ 1552], 99.50th=[ 1552], 99.90th=[ 1552], 99.95th=[ 1552], | 99.99th=[ 1552] bw ( KiB/s): min= 7801, max= 7801, per=100.00%, avg=7801.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=1699KiB/s (1739kB/s)(8192KiB/4823msec); 0 zone resets clat (msec): min=1050, max=2133, avg=1592.14, stdev=765.81 lat (msec): min=1134, max=2133, avg=1634.08, stdev=706.94 clat percentiles (msec): | 1.00th=[ 1053], 5.00th=[ 1053], 10.00th=[ 1053], 20.00th=[ 1053], | 30.00th=[ 1053], 40.00th=[ 1053], 50.00th=[ 1053], 60.00th=[ 2140], | 70.00th=[ 2140], 80.00th=[ 2140], 90.00th=[ 2140], 95.00th=[ 2140], | 99.00th=[ 2140], 99.50th=[ 2140], 99.90th=[ 2140], 99.95th=[ 2140], | 99.99th=[ 2140] bw ( KiB/s): min= 7984, max= 7984, per=100.00%, avg=7984.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 2000=66.67%, >=2000=33.33% cpu : usr=0.08%, sys=2.53%, ctx=89, 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=144838: Thu Sep 10 12:41:22 2026 write: IOPS=0, BW=2196KiB/s (2249kB/s)(12.0MiB/5595msec); 0 zone resets clat (msec): min=1613, max=2113, avg=1861.57, stdev=250.43 lat (msec): min=1614, max=2114, avg=1862.30, stdev=249.71 clat percentiles (msec): | 1.00th=[ 1620], 5.00th=[ 1620], 10.00th=[ 1620], 20.00th=[ 1620], | 30.00th=[ 1620], 40.00th=[ 1854], 50.00th=[ 1854], 60.00th=[ 1854], | 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= 7801, max= 8126, per=100.00%, avg=7963.50, stdev=229.81, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 2000=66.67%, >=2000=33.33% cpu : usr=0.13%, sys=4.49%, ctx=88, 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=144839: Thu Sep 10 12:41:22 2026 write: IOPS=0, BW=3583KiB/s (3668kB/s)(12.0MiB/3430msec); 0 zone resets clat (msec): min=767, max=1784, avg=1137.83, stdev=562.15 lat (msec): min=776, max=1784, avg=1140.85, stdev=559.33 clat percentiles (msec): | 1.00th=[ 768], 5.00th=[ 768], 10.00th=[ 768], 20.00th=[ 768], | 30.00th=[ 768], 40.00th=[ 860], 50.00th=[ 860], 60.00th=[ 860], | 70.00th=[ 1787], 80.00th=[ 1787], 90.00th=[ 1787], 95.00th=[ 1787], | 99.00th=[ 1787], 99.50th=[ 1787], 99.90th=[ 1787], 99.95th=[ 1787], | 99.99th=[ 1787] bw ( KiB/s): min= 8031, max= 8126, per=100.00%, avg=8078.50, stdev=67.18, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 1000=66.67%, 2000=33.33% cpu : usr=0.00%, sys=2.42%, ctx=52, 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 Run status group 0 (all jobs): READ: bw=3118KiB/s (3193kB/s), 849KiB/s-2338KiB/s (870kB/s-2394kB/s), io=16.0MiB (16.8MB), run=4823-5255msec WRITE: bw=5857KiB/s (5997kB/s), 1699KiB/s-3583KiB/s (1739kB/s-3668kB/s), io=32.0MiB (33.6MB), run=3430-5595msec