== sanity test 398b: DIO and buffer IO race ============== 15:37:05 (1788205025) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 4.98102 s, 10.1 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=145368: Mon Aug 31 15:39:22 2026 read: IOPS=12, BW=49.3KiB/s (50.5kB/s)(5992KiB/121503msec) clat (usec): min=34, max=494456, avg=39695.99, stdev=28732.47 lat (usec): min=35, max=494457, avg=39699.30, stdev=28732.14 clat percentiles (usec): | 1.00th=[ 53], 5.00th=[ 71], 10.00th=[ 12256], 20.00th=[ 20579], | 30.00th=[ 23987], 40.00th=[ 29230], 50.00th=[ 34866], 60.00th=[ 41157], | 70.00th=[ 48497], 80.00th=[ 59507], 90.00th=[ 73925], 95.00th=[ 86508], | 99.00th=[115868], 99.50th=[137364], 99.90th=[235930], 99.95th=[492831], | 99.99th=[492831] bw ( KiB/s): min= 7, max= 110, per=25.00%, avg=49.25, stdev=20.07, samples=238 iops : min= 1, max= 27, avg=11.68, stdev= 5.06, samples=238 write: IOPS=12, BW=51.8KiB/s (53.1kB/s)(6296KiB/121503msec); 0 zone resets clat (usec): min=1098, max=995528, avg=39123.41, stdev=46046.09 lat (usec): min=1099, max=995530, avg=39127.42, stdev=46047.75 clat percentiles (usec): | 1.00th=[ 1254], 5.00th=[ 1582], 10.00th=[ 2507], 20.00th=[ 5276], | 30.00th=[ 10421], 40.00th=[ 19792], 50.00th=[ 30016], 60.00th=[ 40109], | 70.00th=[ 51643], 80.00th=[ 64226], 90.00th=[ 87557], 95.00th=[106431], | 99.00th=[158335], 99.50th=[181404], 99.90th=[438305], 99.95th=[994051], | 99.99th=[994051] bw ( KiB/s): min= 7, max= 111, per=25.13%, avg=51.76, stdev=21.50, samples=238 iops : min= 1, max= 27, avg=12.31, stdev= 5.43, samples=238 lat (usec) : 50=0.33%, 100=3.03%, 250=0.42%, 500=0.16%, 750=0.03% lat (usec) : 1000=0.03% lat (msec) : 2=3.97%, 4=4.49%, 10=7.00%, 20=10.61%, 50=40.30% lat (msec) : 100=25.13%, 250=4.30%, 500=0.16%, 1000=0.03% cpu : usr=0.08%, sys=5.78%, ctx=7069, majf=0, minf=17 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1498,1574,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145369: Mon Aug 31 15:39:22 2026 read: IOPS=12, BW=49.0KiB/s (51.2kB/s)(5940KiB/118836msec) clat (usec): min=29, max=420825, avg=40030.15, stdev=31291.65 lat (usec): min=29, max=420826, avg=40034.58, stdev=31290.12 clat percentiles (usec): | 1.00th=[ 51], 5.00th=[ 62], 10.00th=[ 12518], 20.00th=[ 19268], | 30.00th=[ 23987], 40.00th=[ 28967], 50.00th=[ 34341], 60.00th=[ 40633], | 70.00th=[ 47973], 80.00th=[ 57410], 90.00th=[ 72877], 95.00th=[ 90702], | 99.00th=[139461], 99.50th=[168821], 99.90th=[312476], 99.95th=[421528], | 99.99th=[421528] bw ( KiB/s): min= 7, max= 118, per=25.33%, avg=49.89, stdev=18.80, samples=233 iops : min= 1, max= 29, avg=11.84, stdev= 4.73, samples=233 write: IOPS=13, BW=53.4KiB/s (54.7kB/s)(6348KiB/118836msec); 0 zone resets clat (usec): min=1085, max=1006.9k, avg=37154.79, stdev=43527.43 lat (usec): min=1087, max=1006.9k, avg=37160.19, stdev=43526.62 clat percentiles (usec): | 1.00th=[ 1237], 5.00th=[ 1549], 10.00th=[ 2409], | 20.00th=[ 4948], 30.00th=[ 8717], 40.00th=[ 18220], | 50.00th=[ 27919], 60.00th=[ 36963], 70.00th=[ 47973], | 80.00th=[ 63701], 90.00th=[ 86508], 95.00th=[ 103285], | 99.00th=[ 149947], 99.50th=[ 166724], 99.90th=[ 379585], | 99.95th=[1010828], 99.99th=[1010828] bw ( KiB/s): min= 15, max= 134, per=25.81%, avg=53.17, stdev=21.93, samples=234 iops : min= 3, max= 33, avg=12.66, stdev= 5.53, samples=234 lat (usec) : 50=0.36%, 100=3.39%, 250=0.36%, 500=0.07%, 750=0.07% lat (usec) : 1000=0.03% lat (msec) : 2=4.17%, 4=4.88%, 10=7.88%, 20=10.74%, 50=40.33% lat (msec) : 100=22.85%, 250=4.72%, 500=0.13%, 2000=0.03% cpu : usr=0.09%, sys=5.91%, ctx=6707, 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=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=145370: Mon Aug 31 15:39:22 2026 read: IOPS=12, BW=49.6KiB/s (50.8kB/s)(6028KiB/121611msec) clat (usec): min=37, max=1108.2k, avg=39670.79, stdev=40609.69 lat (usec): min=37, max=1108.2k, avg=39674.55, stdev=40608.60 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 69], 10.00th=[ 9372], | 20.00th=[ 18744], 30.00th=[ 23462], 40.00th=[ 27919], | 50.00th=[ 33424], 60.00th=[ 40109], 70.00th=[ 47449], | 80.00th=[ 56886], 90.00th=[ 71828], 95.00th=[ 89654], | 99.00th=[ 141558], 99.50th=[ 210764], 99.90th=[ 283116], | 99.95th=[1115685], 99.99th=[1115685] bw ( KiB/s): min= 7, max= 111, per=24.98%, avg=49.22, stdev=22.58, samples=239 iops : min= 1, max= 27, avg=11.67, stdev= 5.68, samples=239 write: IOPS=12, BW=51.5KiB/s (52.7kB/s)(6260KiB/121611msec); 0 zone resets clat (usec): min=1126, max=253254, avg=39226.29, stdev=38862.97 lat (usec): min=1127, max=253255, avg=39228.62, stdev=38863.90 clat percentiles (usec): | 1.00th=[ 1254], 5.00th=[ 1614], 10.00th=[ 2507], 20.00th=[ 4883], | 30.00th=[ 9372], 40.00th=[ 19268], 50.00th=[ 29492], 60.00th=[ 38536], | 70.00th=[ 51119], 80.00th=[ 67634], 90.00th=[ 91751], 95.00th=[116917], | 99.00th=[170918], 99.50th=[191890], 99.90th=[229639], 99.95th=[252707], | 99.99th=[252707] bw ( KiB/s): min= 7, max= 135, per=24.78%, avg=51.05, stdev=22.93, samples=239 iops : min= 1, max= 33, avg=12.13, stdev= 5.78, samples=239 lat (usec) : 50=0.39%, 100=3.09%, 250=0.62%, 500=0.23%, 750=0.13% lat (usec) : 1000=0.10% lat (msec) : 2=3.87%, 4=4.52%, 10=7.65%, 20=11.20%, 50=39.78% lat (msec) : 100=22.92%, 250=5.34%, 500=0.13%, 2000=0.03% cpu : usr=0.07%, sys=5.71%, ctx=6939, 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=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=145371: Mon Aug 31 15:39:22 2026 read: IOPS=12, BW=49.8KiB/s (51.0kB/s)(6052KiB/121446msec) clat (usec): min=31, max=1076.6k, avg=39329.77, stdev=38776.95 lat (usec): min=31, max=1076.6k, avg=39336.28, stdev=38776.09 clat percentiles (usec): | 1.00th=[ 50], 5.00th=[ 65], 10.00th=[ 758], | 20.00th=[ 19268], 30.00th=[ 23987], 40.00th=[ 28181], | 50.00th=[ 33162], 60.00th=[ 39584], 70.00th=[ 46924], | 80.00th=[ 56361], 90.00th=[ 71828], 95.00th=[ 91751], | 99.00th=[ 135267], 99.50th=[ 166724], 99.90th=[ 263193], | 99.95th=[1082131], 99.99th=[1082131] bw ( KiB/s): min= 7, max= 151, per=25.61%, avg=50.44, stdev=21.66, samples=235 iops : min= 1, max= 37, avg=11.97, stdev= 5.44, samples=235 write: IOPS=12, BW=51.3KiB/s (52.6kB/s)(6236KiB/121446msec); 0 zone resets clat (usec): min=1144, max=438669, avg=39417.88, stdev=41229.69 lat (usec): min=1145, max=438670, avg=39420.30, stdev=41230.42 clat percentiles (usec): | 1.00th=[ 1270], 5.00th=[ 1582], 10.00th=[ 2474], 20.00th=[ 5211], | 30.00th=[ 9896], 40.00th=[ 18482], 50.00th=[ 29492], 60.00th=[ 39584], | 70.00th=[ 50594], 80.00th=[ 65274], 90.00th=[ 92799], 95.00th=[114820], | 99.00th=[181404], 99.50th=[208667], 99.90th=[383779], 99.95th=[438305], | 99.99th=[438305] bw ( KiB/s): min= 7, max= 126, per=24.98%, avg=51.47, stdev=20.32, samples=237 iops : min= 1, max= 31, avg=12.23, stdev= 5.11, samples=237 lat (usec) : 50=0.55%, 100=3.48%, 250=0.68%, 500=0.13%, 750=0.07% lat (usec) : 1000=0.10% lat (msec) : 2=4.07%, 4=4.10%, 10=7.49%, 20=11.17%, 50=39.19% lat (msec) : 100=23.21%, 250=5.57%, 500=0.16%, 2000=0.03% cpu : usr=0.07%, sys=5.65%, ctx=6918, 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=197KiB/s (202kB/s), 49.3KiB/s-49.0KiB/s (50.5kB/s-51.2kB/s), io=23.4MiB (24.6MB), run=118836-121611msec WRITE: bw=207KiB/s (212kB/s), 51.3KiB/s-53.4KiB/s (52.6kB/s-54.7kB/s), io=24.6MiB (25.7MB), run=118836-121611msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145373: Mon Aug 31 15:41:11 2026 read: IOPS=6, BW=26.2KiB/s (26.8kB/s)(5992KiB/228593msec) clat (msec): min=4, max=1186, avg=33.06, stdev=42.80 lat (msec): min=4, max=1186, avg=33.06, stdev=42.80 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 8], 10.00th=[ 10], 20.00th=[ 12], | 30.00th=[ 15], 40.00th=[ 19], 50.00th=[ 23], 60.00th=[ 28], | 70.00th=[ 35], 80.00th=[ 44], 90.00th=[ 70], 95.00th=[ 95], | 99.00th=[ 155], 99.50th=[ 192], 99.90th=[ 351], 99.95th=[ 1183], | 99.99th=[ 1183] bw ( KiB/s): min= 7, max= 144, per=27.96%, avg=29.07, stdev=21.39, samples=400 iops : min= 1, max= 36, avg= 6.67, stdev= 5.45, samples=400 write: IOPS=6, BW=27.5KiB/s (28.2kB/s)(6296KiB/228593msec); 0 zone resets clat (msec): min=16, max=545, avg=113.54, stdev=68.60 lat (msec): min=16, max=545, avg=113.54, stdev=68.60 clat percentiles (msec): | 1.00th=[ 22], 5.00th=[ 30], 10.00th=[ 38], 20.00th=[ 56], | 30.00th=[ 73], 40.00th=[ 87], 50.00th=[ 99], 60.00th=[ 117], | 70.00th=[ 138], 80.00th=[ 165], 90.00th=[ 205], 95.00th=[ 239], | 99.00th=[ 334], 99.50th=[ 388], 99.90th=[ 510], 99.95th=[ 550], | 99.99th=[ 550] bw ( KiB/s): min= 7, max= 128, per=25.13%, avg=27.39, stdev=18.29, samples=445 iops : min= 1, max= 32, avg= 6.25, stdev= 4.69, samples=445 lat (msec) : 10=6.05%, 20=15.72%, 50=27.41%, 100=23.37%, 250=25.29% lat (msec) : 500=2.05%, 750=0.07%, 2000=0.03% cpu : usr=0.05%, sys=1.79%, ctx=5789, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1498,1574,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145374: Mon Aug 31 15:41:11 2026 read: IOPS=6, BW=25.9KiB/s (26.5kB/s)(5940KiB/229434msec) clat (msec): min=4, max=1133, avg=33.15, stdev=44.31 lat (msec): min=4, max=1133, avg=33.15, stdev=44.31 clat percentiles (msec): | 1.00th=[ 6], 5.00th=[ 8], 10.00th=[ 9], 20.00th=[ 12], | 30.00th=[ 15], 40.00th=[ 19], 50.00th=[ 22], 60.00th=[ 27], | 70.00th=[ 33], 80.00th=[ 44], 90.00th=[ 71], 95.00th=[ 101], | 99.00th=[ 157], 99.50th=[ 190], 99.90th=[ 426], 99.95th=[ 1133], | 99.99th=[ 1133] bw ( KiB/s): min= 7, max= 111, per=27.87%, avg=28.98, stdev=21.23, samples=398 iops : min= 1, max= 27, avg= 6.65, stdev= 5.40, samples=398 write: IOPS=6, BW=27.7KiB/s (28.3kB/s)(6348KiB/229434msec); 0 zone resets clat (msec): min=16, max=600, avg=113.35, stdev=70.19 lat (msec): min=16, max=600, avg=113.36, stdev=70.19 clat percentiles (msec): | 1.00th=[ 21], 5.00th=[ 29], 10.00th=[ 37], 20.00th=[ 56], | 30.00th=[ 69], 40.00th=[ 84], 50.00th=[ 99], 60.00th=[ 116], | 70.00th=[ 138], 80.00th=[ 163], 90.00th=[ 205], 95.00th=[ 241], | 99.00th=[ 338], 99.50th=[ 384], 99.90th=[ 592], 99.95th=[ 600], | 99.99th=[ 600] bw ( KiB/s): min= 7, max= 136, per=25.22%, avg=27.49, stdev=18.86, samples=448 iops : min= 1, max= 34, avg= 6.27, stdev= 4.83, samples=448 lat (msec) : 10=6.61%, 20=15.72%, 50=26.86%, 100=23.11%, 250=25.46% lat (msec) : 500=2.15%, 750=0.07%, 2000=0.03% cpu : usr=0.04%, sys=1.77%, ctx=5731, 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=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=145375: Mon Aug 31 15:41:11 2026 read: IOPS=6, BW=26.2KiB/s (26.8kB/s)(6028KiB/230492msec) clat (msec): min=4, max=426, avg=33.47, stdev=34.48 lat (msec): min=4, max=426, avg=33.47, stdev=34.48 clat percentiles (msec): | 1.00th=[ 6], 5.00th=[ 8], 10.00th=[ 10], 20.00th=[ 12], | 30.00th=[ 15], 40.00th=[ 20], 50.00th=[ 23], 60.00th=[ 28], | 70.00th=[ 35], 80.00th=[ 48], 90.00th=[ 71], 95.00th=[ 96], | 99.00th=[ 161], 99.50th=[ 222], 99.90th=[ 351], 99.95th=[ 426], | 99.99th=[ 426] bw ( KiB/s): min= 7, max= 144, per=27.16%, avg=28.25, stdev=22.09, samples=414 iops : min= 1, max= 36, avg= 6.47, stdev= 5.59, samples=414 write: IOPS=6, BW=27.2KiB/s (27.8kB/s)(6260KiB/230492msec); 0 zone resets clat (msec): min=16, max=1322, avg=114.82, stdev=76.65 lat (msec): min=16, max=1322, avg=114.82, stdev=76.65 clat percentiles (msec): | 1.00th=[ 24], 5.00th=[ 30], 10.00th=[ 39], 20.00th=[ 55], | 30.00th=[ 69], 40.00th=[ 84], 50.00th=[ 97], 60.00th=[ 115], | 70.00th=[ 140], 80.00th=[ 167], 90.00th=[ 213], 95.00th=[ 249], | 99.00th=[ 347], 99.50th=[ 376], 99.90th=[ 584], 99.95th=[ 1318], | 99.99th=[ 1318] bw ( KiB/s): min= 7, max= 111, per=24.71%, avg=26.93, stdev=18.30, samples=450 iops : min= 1, max= 27, avg= 6.14, stdev= 4.69, samples=450 lat (msec) : 10=6.18%, 20=15.33%, 50=27.05%, 100=24.90%, 250=23.80% lat (msec) : 500=2.67%, 750=0.03%, 2000=0.03% cpu : usr=0.04%, sys=1.79%, ctx=5825, 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=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=145376: Mon Aug 31 15:41:11 2026 read: IOPS=6, BW=26.5KiB/s (27.1kB/s)(6052KiB/228561msec) clat (msec): min=4, max=407, avg=32.64, stdev=34.51 lat (msec): min=4, max=407, avg=32.64, stdev=34.51 clat percentiles (msec): | 1.00th=[ 6], 5.00th=[ 8], 10.00th=[ 9], 20.00th=[ 12], | 30.00th=[ 14], 40.00th=[ 18], 50.00th=[ 21], 60.00th=[ 26], | 70.00th=[ 33], 80.00th=[ 45], 90.00th=[ 75], 95.00th=[ 105], | 99.00th=[ 167], 99.50th=[ 199], 99.90th=[ 296], 99.95th=[ 409], | 99.99th=[ 409] bw ( KiB/s): min= 7, max= 160, per=28.16%, avg=29.29, stdev=23.48, samples=401 iops : min= 1, max= 40, avg= 6.74, stdev= 5.96, samples=401 write: IOPS=6, BW=27.3KiB/s (27.9kB/s)(6236KiB/228561msec); 0 zone resets clat (msec): min=17, max=1205, avg=114.68, stdev=71.90 lat (msec): min=17, max=1205, avg=114.69, stdev=71.90 clat percentiles (msec): | 1.00th=[ 22], 5.00th=[ 30], 10.00th=[ 37], 20.00th=[ 57], | 30.00th=[ 71], 40.00th=[ 87], 50.00th=[ 103], 60.00th=[ 118], | 70.00th=[ 140], 80.00th=[ 167], 90.00th=[ 207], 95.00th=[ 241], | 99.00th=[ 313], 99.50th=[ 342], 99.90th=[ 550], 99.95th=[ 1200], | 99.99th=[ 1200] bw ( KiB/s): min= 7, max= 136, per=24.69%, avg=26.91, stdev=18.01, samples=448 iops : min= 1, max= 34, avg= 6.13, stdev= 4.62, samples=448 lat (msec) : 10=7.32%, 20=16.70%, 50=25.10%, 100=22.30%, 250=26.56% lat (msec) : 500=1.92%, 750=0.07%, 2000=0.03% cpu : usr=0.05%, sys=1.72%, ctx=5618, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1513,1559,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=104KiB/s (107kB/s), 25.9KiB/s-26.5KiB/s (26.5kB/s-27.1kB/s), io=23.4MiB (24.6MB), run=228561-230492msec WRITE: bw=109KiB/s (112kB/s), 27.2KiB/s-27.7KiB/s (27.8kB/s-28.3kB/s), io=24.6MiB (25.7MB), run=228561-230492msec 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=145430: Mon Aug 31 15:41:40 2026 read: IOPS=16, BW=266KiB/s (272kB/s)(5920KiB/22265msec) clat (usec): min=33, max=118299, avg=29701.02, stdev=25851.01 lat (usec): min=33, max=118300, avg=29702.88, stdev=25851.07 clat percentiles (usec): | 1.00th=[ 37], 5.00th=[ 56], 10.00th=[ 63], 20.00th=[ 182], | 30.00th=[ 14353], 40.00th=[ 20579], 50.00th=[ 26346], 60.00th=[ 30540], | 70.00th=[ 38536], 80.00th=[ 47973], 90.00th=[ 64750], 95.00th=[ 84411], | 99.00th=[101188], 99.50th=[115868], 99.90th=[117965], 99.95th=[117965], | 99.99th=[117965] bw ( KiB/s): min= 125, max= 608, per=26.09%, avg=262.70, stdev=112.29, samples=43 iops : min= 7, max= 38, avg=15.72, stdev= 7.17, samples=43 write: IOPS=17, BW=286KiB/s (293kB/s)(6368KiB/22265msec); 0 zone resets clat (usec): min=1510, max=185974, avg=28093.13, stdev=31547.29 lat (usec): min=1511, max=185975, avg=28096.01, stdev=31546.92 clat percentiles (usec): | 1.00th=[ 1729], 5.00th=[ 2311], 10.00th=[ 3490], 20.00th=[ 5342], | 30.00th=[ 8160], 40.00th=[ 10814], 50.00th=[ 15664], 60.00th=[ 23462], | 70.00th=[ 30540], 80.00th=[ 46400], 90.00th=[ 68682], 95.00th=[101188], | 99.00th=[145753], 99.50th=[181404], 99.90th=[185598], 99.95th=[185598], | 99.99th=[185598] bw ( KiB/s): min= 125, max= 542, per=26.90%, avg=284.88, stdev=106.99, samples=43 iops : min= 7, max= 33, avg=17.12, stdev= 6.76, samples=43 lat (usec) : 50=1.30%, 100=6.38%, 250=2.47%, 500=0.39%, 750=0.13% lat (usec) : 1000=0.26% lat (msec) : 2=1.95%, 4=5.08%, 10=12.24%, 20=17.45%, 50=33.46% lat (msec) : 100=15.76%, 250=3.12% cpu : usr=0.10%, sys=10.24%, ctx=1690, 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=145431: Mon Aug 31 15:41:40 2026 read: IOPS=15, BW=241KiB/s (247kB/s)(5744KiB/23785msec) clat (usec): min=37, max=189087, avg=33290.41, stdev=29891.40 lat (usec): min=37, max=189088, avg=33294.12, stdev=29889.78 clat percentiles (usec): | 1.00th=[ 49], 5.00th=[ 59], 10.00th=[ 68], 20.00th=[ 10945], | 30.00th=[ 16909], 40.00th=[ 23200], 50.00th=[ 28443], 60.00th=[ 33424], | 70.00th=[ 39060], 80.00th=[ 53216], 90.00th=[ 68682], 95.00th=[ 86508], | 99.00th=[143655], 99.50th=[160433], 99.90th=[189793], 99.95th=[189793], | 99.99th=[189793] bw ( KiB/s): min= 62, max= 544, per=24.00%, avg=241.63, stdev=112.00, samples=46 iops : min= 3, max= 34, avg=14.41, stdev= 7.17, samples=46 write: IOPS=17, BW=275KiB/s (282kB/s)(6544KiB/23785msec); 0 zone resets clat (usec): min=1534, max=187266, avg=28802.31, stdev=32678.00 lat (usec): min=1537, max=187268, avg=28806.99, stdev=32675.71 clat percentiles (usec): | 1.00th=[ 1614], 5.00th=[ 2024], 10.00th=[ 3130], 20.00th=[ 5407], | 30.00th=[ 8094], 40.00th=[ 10814], 50.00th=[ 17433], 60.00th=[ 24249], | 70.00th=[ 32113], 80.00th=[ 45876], 90.00th=[ 73925], 95.00th=[ 91751], | 99.00th=[162530], 99.50th=[179307], 99.90th=[187696], 99.95th=[187696], | 99.99th=[187696] bw ( KiB/s): min= 63, max= 640, per=25.87%, avg=273.98, stdev=128.10, samples=46 iops : min= 3, max= 40, avg=16.46, stdev= 8.15, samples=46 lat (usec) : 50=0.65%, 100=6.12%, 250=1.43% lat (msec) : 2=2.60%, 4=5.47%, 10=13.02%, 20=15.76%, 50=35.55% lat (msec) : 100=15.36%, 250=4.04% cpu : usr=0.07%, sys=9.74%, ctx=1846, 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=145432: Mon Aug 31 15:41:40 2026 read: IOPS=18, BW=302KiB/s (309kB/s)(6256KiB/20729msec) clat (usec): min=35, max=146227, avg=28371.97, stdev=26756.27 lat (usec): min=35, max=146227, avg=28373.26, stdev=26756.27 clat percentiles (usec): | 1.00th=[ 40], 5.00th=[ 55], 10.00th=[ 62], 20.00th=[ 113], | 30.00th=[ 14484], 40.00th=[ 18482], 50.00th=[ 23462], 60.00th=[ 29230], | 70.00th=[ 36963], 80.00th=[ 45876], 90.00th=[ 60556], 95.00th=[ 81265], | 99.00th=[123208], 99.50th=[145753], 99.90th=[145753], 99.95th=[145753], | 99.99th=[145753] bw ( KiB/s): min= 95, max= 633, per=30.26%, avg=304.70, stdev=137.32, samples=40 iops : min= 5, max= 39, avg=18.38, stdev= 8.73, samples=40 write: IOPS=18, BW=291KiB/s (298kB/s)(6032KiB/20729msec); 0 zone resets clat (usec): min=1576, max=169057, avg=25168.92, stdev=27013.28 lat (usec): min=1576, max=169060, avg=25171.32, stdev=27014.11 clat percentiles (usec): | 1.00th=[ 1631], 5.00th=[ 2024], 10.00th=[ 2835], 20.00th=[ 4686], | 30.00th=[ 6849], 40.00th=[ 9503], 50.00th=[ 15139], 60.00th=[ 22152], | 70.00th=[ 28967], 80.00th=[ 42206], 90.00th=[ 64750], 95.00th=[ 81265], | 99.00th=[107480], 99.50th=[152044], 99.90th=[168821], 99.95th=[168821], | 99.99th=[168821] bw ( KiB/s): min= 63, max= 544, per=27.37%, avg=289.90, stdev=115.41, samples=40 iops : min= 3, max= 34, avg=17.45, stdev= 7.32, samples=40 lat (usec) : 50=1.30%, 100=8.20%, 250=2.73%, 500=0.39%, 750=0.13% lat (msec) : 2=2.47%, 4=5.86%, 10=12.76%, 20=16.15%, 50=34.11% lat (msec) : 100=13.93%, 250=1.95% cpu : usr=0.09%, sys=10.74%, ctx=1651, 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=145433: Mon Aug 31 15:41:40 2026 read: IOPS=16, BW=258KiB/s (264kB/s)(6032KiB/23398msec) clat (usec): min=42, max=287806, avg=31288.42, stdev=31004.27 lat (usec): min=44, max=287807, avg=31291.07, stdev=31004.44 clat percentiles (usec): | 1.00th=[ 49], 5.00th=[ 56], 10.00th=[ 62], 20.00th=[ 172], | 30.00th=[ 12649], 40.00th=[ 20841], 50.00th=[ 25560], 60.00th=[ 32900], | 70.00th=[ 40633], 80.00th=[ 52167], 90.00th=[ 71828], 95.00th=[ 83362], | 99.00th=[130548], 99.50th=[164627], 99.90th=[287310], 99.95th=[287310], | 99.99th=[287310] bw ( KiB/s): min= 31, max= 512, per=25.66%, avg=258.35, stdev=115.91, samples=46 iops : min= 1, max= 32, avg=15.46, stdev= 7.41, samples=46 write: IOPS=16, BW=267KiB/s (274kB/s)(6256KiB/23398msec); 0 zone resets clat (usec): min=1493, max=199677, avg=29347.37, stdev=32285.75 lat (usec): min=1493, max=199680, avg=29349.69, stdev=32286.51 clat percentiles (usec): | 1.00th=[ 1598], 5.00th=[ 2212], 10.00th=[ 3851], 20.00th=[ 5211], | 30.00th=[ 7570], 40.00th=[ 11207], 50.00th=[ 17957], 60.00th=[ 25297], | 70.00th=[ 34866], 80.00th=[ 47973], 90.00th=[ 74974], 95.00th=[ 94897], | 99.00th=[156238], 99.50th=[189793], 99.90th=[200279], 99.95th=[200279], | 99.99th=[200279] bw ( KiB/s): min= 95, max= 544, per=25.35%, avg=268.46, stdev=103.61, samples=46 iops : min= 5, max= 34, avg=16.11, stdev= 6.60, samples=46 lat (usec) : 50=0.52%, 100=8.20%, 250=2.60%, 500=0.26%, 1000=0.13% lat (msec) : 2=1.95%, 4=4.30%, 10=13.93%, 20=13.80%, 50=34.77% lat (msec) : 100=16.54%, 250=2.86%, 500=0.13% cpu : usr=0.08%, sys=10.10%, ctx=1717, 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=1007KiB/s (1031kB/s), 241KiB/s-302KiB/s (247kB/s-309kB/s), io=23.4MiB (24.5MB), run=20729-23785msec WRITE: bw=1059KiB/s (1085kB/s), 267KiB/s-291KiB/s (274kB/s-298kB/s), io=24.6MiB (25.8MB), run=20729-23785msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145426: Mon Aug 31 15:42:18 2026 read: IOPS=6, BW=96.1KiB/s (98.4kB/s)(5920KiB/61633msec) clat (msec): min=6, max=267, avg=32.96, stdev=35.07 lat (msec): min=6, max=267, avg=32.96, stdev=35.07 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 10], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 15], 40.00th=[ 18], 50.00th=[ 21], 60.00th=[ 25], | 70.00th=[ 32], 80.00th=[ 42], 90.00th=[ 73], 95.00th=[ 100], | 99.00th=[ 199], 99.50th=[ 249], 99.90th=[ 268], 99.95th=[ 268], | 99.99th=[ 268] bw ( KiB/s): min= 31, max= 320, per=28.01%, avg=108.66, stdev=64.25, samples=107 iops : min= 1, max= 20, avg= 6.07, stdev= 4.10, samples=107 write: IOPS=6, BW=103KiB/s (106kB/s)(6368KiB/61633msec); 0 zone resets clat (msec): min=36, max=395, avg=123.82, stdev=65.19 lat (msec): min=36, max=395, avg=123.82, stdev=65.19 clat percentiles (msec): | 1.00th=[ 40], 5.00th=[ 47], 10.00th=[ 57], 20.00th=[ 69], | 30.00th=[ 87], 40.00th=[ 97], 50.00th=[ 107], 60.00th=[ 124], | 70.00th=[ 144], 80.00th=[ 165], 90.00th=[ 213], 95.00th=[ 257], | 99.00th=[ 338], 99.50th=[ 355], 99.90th=[ 397], 99.95th=[ 397], | 99.99th=[ 397] bw ( KiB/s): min= 31, max= 224, per=25.58%, avg=104.36, stdev=49.33, samples=120 iops : min= 1, max= 14, avg= 5.80, stdev= 3.15, samples=120 lat (msec) : 10=3.12%, 20=19.79%, 50=21.48%, 100=23.18%, 250=29.30% lat (msec) : 500=3.12% cpu : usr=0.04%, sys=1.94%, ctx=1448, 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=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=145427: Mon Aug 31 15:42:18 2026 read: IOPS=5, BW=94.6KiB/s (96.9kB/s)(5744KiB/60695msec) clat (msec): min=5, max=335, avg=30.16, stdev=30.66 lat (msec): min=5, max=335, avg=30.17, stdev=30.66 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 20], 50.00th=[ 22], 60.00th=[ 26], | 70.00th=[ 30], 80.00th=[ 36], 90.00th=[ 57], 95.00th=[ 81], | 99.00th=[ 167], 99.50th=[ 249], 99.90th=[ 338], 99.95th=[ 338], | 99.99th=[ 338] bw ( KiB/s): min= 31, max= 416, per=27.65%, avg=107.29, stdev=73.12, samples=106 iops : min= 1, max= 26, avg= 5.96, stdev= 4.64, samples=106 write: IOPS=6, BW=108KiB/s (110kB/s)(6544KiB/60695msec); 0 zone resets clat (msec): min=26, max=391, avg=121.78, stdev=61.01 lat (msec): min=26, max=391, avg=121.79, stdev=61.01 clat percentiles (msec): | 1.00th=[ 40], 5.00th=[ 53], 10.00th=[ 62], 20.00th=[ 72], | 30.00th=[ 83], 40.00th=[ 95], 50.00th=[ 107], 60.00th=[ 122], | 70.00th=[ 138], 80.00th=[ 165], 90.00th=[ 211], 95.00th=[ 247], | 99.00th=[ 300], 99.50th=[ 317], 99.90th=[ 393], 99.95th=[ 393], | 99.99th=[ 393] bw ( KiB/s): min= 31, max= 255, per=26.25%, avg=107.08, stdev=48.15, samples=120 iops : min= 1, max= 15, avg= 5.96, stdev= 3.09, samples=120 lat (msec) : 10=2.86%, 20=16.93%, 50=23.31%, 100=26.17%, 250=28.26% lat (msec) : 500=2.47% cpu : usr=0.02%, sys=1.98%, ctx=1403, 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=145428: Mon Aug 31 15:42:18 2026 read: IOPS=6, BW=104KiB/s (107kB/s)(6256KiB/59903msec) clat (msec): min=6, max=336, avg=34.75, stdev=36.43 lat (msec): min=6, max=336, avg=34.75, stdev=36.43 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 20], 50.00th=[ 24], 60.00th=[ 28], | 70.00th=[ 34], 80.00th=[ 43], 90.00th=[ 71], 95.00th=[ 107], | 99.00th=[ 199], 99.50th=[ 222], 99.90th=[ 338], 99.95th=[ 338], | 99.99th=[ 338] bw ( KiB/s): min= 30, max= 320, per=28.62%, avg=111.04, stdev=68.28, samples=111 iops : min= 1, max= 20, avg= 6.22, stdev= 4.33, samples=111 write: IOPS=6, BW=101KiB/s (103kB/s)(6032KiB/59903msec); 0 zone resets clat (msec): min=32, max=393, avg=122.73, stdev=65.70 lat (msec): min=32, max=393, avg=122.73, stdev=65.70 clat percentiles (msec): | 1.00th=[ 35], 5.00th=[ 52], 10.00th=[ 59], 20.00th=[ 73], | 30.00th=[ 84], 40.00th=[ 93], 50.00th=[ 104], 60.00th=[ 118], | 70.00th=[ 144], 80.00th=[ 169], 90.00th=[ 209], 95.00th=[ 262], | 99.00th=[ 359], 99.50th=[ 384], 99.90th=[ 393], 99.95th=[ 393], | 99.99th=[ 393] bw ( KiB/s): min= 30, max= 223, per=24.81%, avg=101.21, stdev=47.69, samples=116 iops : min= 1, max= 13, avg= 5.59, stdev= 3.05, samples=116 lat (msec) : 10=2.73%, 20=18.36%, 50=23.57%, 100=26.43%, 250=26.30% lat (msec) : 500=2.60% cpu : usr=0.05%, sys=1.94%, ctx=1399, 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=145429: Mon Aug 31 15:42:18 2026 read: IOPS=6, BW=98.9KiB/s (101kB/s)(6032KiB/60967msec) clat (msec): min=7, max=285, avg=33.31, stdev=34.29 lat (msec): min=7, max=285, avg=33.31, stdev=34.29 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 20], 50.00th=[ 23], 60.00th=[ 27], | 70.00th=[ 32], 80.00th=[ 41], 90.00th=[ 64], 95.00th=[ 100], | 99.00th=[ 174], 99.50th=[ 257], 99.90th=[ 288], 99.95th=[ 288], | 99.99th=[ 288] bw ( KiB/s): min= 31, max= 320, per=28.77%, avg=111.63, stdev=65.84, samples=105 iops : min= 1, max= 20, avg= 6.23, stdev= 4.15, samples=105 write: IOPS=6, BW=103KiB/s (105kB/s)(6256KiB/60967msec); 0 zone resets clat (msec): min=25, max=670, avg=123.64, stdev=69.71 lat (msec): min=25, max=670, avg=123.65, stdev=69.71 clat percentiles (msec): | 1.00th=[ 37], 5.00th=[ 49], 10.00th=[ 61], 20.00th=[ 74], | 30.00th=[ 84], 40.00th=[ 94], 50.00th=[ 106], 60.00th=[ 120], | 70.00th=[ 138], 80.00th=[ 165], 90.00th=[ 201], 95.00th=[ 257], | 99.00th=[ 376], 99.50th=[ 397], 99.90th=[ 667], 99.95th=[ 667], | 99.99th=[ 667] bw ( KiB/s): min= 30, max= 223, per=25.16%, avg=102.66, stdev=47.07, samples=119 iops : min= 1, max= 13, avg= 5.68, stdev= 3.03, samples=119 lat (msec) : 10=2.47%, 20=18.88%, 50=23.05%, 100=25.39%, 250=27.08% lat (msec) : 500=2.99%, 750=0.13% cpu : usr=0.03%, sys=1.98%, ctx=1441, 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=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=389KiB/s (398kB/s), 94.6KiB/s-104KiB/s (96.9kB/s-107kB/s), io=23.4MiB (24.5MB), run=59903-61633msec WRITE: bw=409KiB/s (419kB/s), 101KiB/s-108KiB/s (103kB/s-110kB/s), io=24.6MiB (25.8MB), run=59903-61633msec 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=145451: Mon Aug 31 15:42:31 2026 read: IOPS=1, BW=1153KiB/s (1181kB/s)(7168KiB/6216msec) clat (usec): min=513, max=3390.9k, avg=660644.50, stdev=1215807.05 lat (usec): min=515, max=3390.9k, avg=660645.94, stdev=1215806.95 clat percentiles (usec): | 1.00th=[ 515], 5.00th=[ 515], 10.00th=[ 515], | 20.00th=[ 114820], 30.00th=[ 158335], 40.00th=[ 158335], | 50.00th=[ 160433], 60.00th=[ 252707], 70.00th=[ 252707], | 80.00th=[ 549454], 90.00th=[3405775], 95.00th=[3405775], | 99.00th=[3405775], 99.50th=[3405775], 99.90th=[3405775], | 99.95th=[3405775], 99.99th=[3405775] bw ( KiB/s): min= 1976, max= 3792, per=80.25%, avg=2643.50, stdev=845.63, samples=4 iops : min= 1, max= 3, avg= 1.75, stdev= 0.96, samples=4 write: IOPS=0, BW=824KiB/s (843kB/s)(5120KiB/6216msec); 0 zone resets clat (msec): min=170, max=400, avg=263.84, stdev=94.35 lat (msec): min=170, max=400, avg=263.94, stdev=94.33 clat percentiles (msec): | 1.00th=[ 171], 5.00th=[ 171], 10.00th=[ 171], 20.00th=[ 171], | 30.00th=[ 178], 40.00th=[ 178], 50.00th=[ 279], 60.00th=[ 279], | 70.00th=[ 292], 80.00th=[ 292], 90.00th=[ 401], 95.00th=[ 401], | 99.00th=[ 401], 99.50th=[ 401], 99.90th=[ 401], 99.95th=[ 401], | 99.99th=[ 401] bw ( KiB/s): min= 2023, max= 3953, per=57.93%, avg=2671.67, stdev=1109.70, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 lat (usec) : 750=8.33% lat (msec) : 250=41.67%, 500=33.33%, 750=8.33%, >=2000=8.33% cpu : usr=0.02%, sys=9.54%, ctx=505, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=7,5,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145452: Mon Aug 31 15:42:31 2026 read: IOPS=0, BW=362KiB/s (370kB/s)(2048KiB/5661msec) clat (usec): min=1060, max=214385, avg=107722.65, stdev=150843.57 lat (usec): min=1061, max=214387, avg=107724.37, stdev=150844.18 clat percentiles (usec): | 1.00th=[ 1057], 5.00th=[ 1057], 10.00th=[ 1057], 20.00th=[ 1057], | 30.00th=[ 1057], 40.00th=[ 1057], 50.00th=[ 1057], 60.00th=[214959], | 70.00th=[214959], 80.00th=[214959], 90.00th=[214959], 95.00th=[214959], | 99.00th=[214959], 99.50th=[214959], 99.90th=[214959], 99.95th=[214959], | 99.99th=[214959] bw ( KiB/s): min= 1976, max= 2035, per=60.88%, avg=2005.50, stdev=41.72, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1809KiB/s (1852kB/s)(10.0MiB/5661msec); 0 zone resets clat (msec): min=148, max=2363, avg=522.79, stdev=658.33 lat (msec): min=148, max=2363, avg=522.93, stdev=658.31 clat percentiles (msec): | 1.00th=[ 148], 5.00th=[ 148], 10.00th=[ 148], 20.00th=[ 186], | 30.00th=[ 224], 40.00th=[ 251], 50.00th=[ 317], 60.00th=[ 351], | 70.00th=[ 384], 80.00th=[ 498], 90.00th=[ 510], 95.00th=[ 2366], | 99.00th=[ 2366], 99.50th=[ 2366], 99.90th=[ 2366], 99.95th=[ 2366], | 99.99th=[ 2366] bw ( KiB/s): min= 1984, max= 6144, per=66.05%, avg=3046.17, stdev=1726.21, samples=6 iops : min= 1, max= 6, avg= 2.17, stdev= 2.04, samples=6 lat (msec) : 2=8.33%, 250=33.33%, 500=41.67%, 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=12.35%, ctx=198, 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=145454: Mon Aug 31 15:42:31 2026 read: IOPS=1, BW=1153KiB/s (1181kB/s)(6144KiB/5327msec) clat (msec): min=7, max=375, avg=144.97, stdev=131.56 lat (msec): min=7, max=375, avg=144.97, stdev=131.56 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 8], 10.00th=[ 8], 20.00th=[ 33], | 30.00th=[ 33], 40.00th=[ 127], 50.00th=[ 127], 60.00th=[ 148], | 70.00th=[ 180], 80.00th=[ 180], 90.00th=[ 376], 95.00th=[ 376], | 99.00th=[ 376], 99.50th=[ 376], 99.90th=[ 376], 99.95th=[ 376], | 99.99th=[ 376] bw ( KiB/s): min= 2019, max= 4071, per=77.23%, avg=2544.00, stdev=1018.06, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 write: IOPS=1, BW=1153KiB/s (1181kB/s)(6144KiB/5327msec); 0 zone resets clat (msec): min=167, max=2399, avg=739.32, stdev=837.46 lat (msec): min=167, max=2399, avg=739.40, stdev=837.45 clat percentiles (msec): | 1.00th=[ 167], 5.00th=[ 167], 10.00th=[ 167], 20.00th=[ 201], | 30.00th=[ 201], 40.00th=[ 472], 50.00th=[ 472], 60.00th=[ 493], | 70.00th=[ 701], 80.00th=[ 701], 90.00th=[ 2400], 95.00th=[ 2400], | 99.00th=[ 2400], 99.50th=[ 2400], 99.90th=[ 2400], 99.95th=[ 2400], | 99.99th=[ 2400] bw ( KiB/s): min= 2019, max= 4079, per=55.16%, avg=2544.00, stdev=1023.38, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 lat (msec) : 10=8.33%, 50=8.33%, 250=41.67%, 500=25.00%, 750=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=9.11%, ctx=163, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=6,6,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145456: Mon Aug 31 15:42:31 2026 read: IOPS=1, BW=1071KiB/s (1097kB/s)(5120KiB/4779msec) clat (msec): min=2, max=272, avg=175.18, stdev=104.93 lat (msec): min=2, max=272, avg=175.19, stdev=104.93 clat percentiles (msec): | 1.00th=[ 3], 5.00th=[ 3], 10.00th=[ 3], 20.00th=[ 3], | 30.00th=[ 174], 40.00th=[ 174], 50.00th=[ 184], 60.00th=[ 184], | 70.00th=[ 245], 80.00th=[ 245], 90.00th=[ 275], 95.00th=[ 275], | 99.00th=[ 275], 99.50th=[ 275], 99.90th=[ 275], 99.95th=[ 275], | 99.99th=[ 275] bw ( KiB/s): min= 4079, max= 4096, per=100.00%, avg=4087.50, stdev=12.02, samples=2 iops : min= 3, max= 4, avg= 3.50, stdev= 0.71, samples=2 write: IOPS=1, BW=1500KiB/s (1536kB/s)(7168KiB/4779msec); 0 zone resets clat (msec): min=113, max=2365, avg=550.00, stdev=818.24 lat (msec): min=113, max=2365, avg=550.09, stdev=818.23 clat percentiles (msec): | 1.00th=[ 114], 5.00th=[ 114], 10.00th=[ 114], 20.00th=[ 150], | 30.00th=[ 169], 40.00th=[ 169], 50.00th=[ 194], 60.00th=[ 243], | 70.00th=[ 243], 80.00th=[ 617], 90.00th=[ 2366], 95.00th=[ 2366], | 99.00th=[ 2366], 99.50th=[ 2366], 99.90th=[ 2366], 99.95th=[ 2366], | 99.99th=[ 2366] bw ( KiB/s): min= 1442, max= 6035, per=72.14%, avg=3327.00, stdev=2062.50, samples=4 iops : min= 1, max= 5, avg= 2.50, stdev= 1.91, samples=4 lat (msec) : 4=8.33%, 250=66.67%, 500=8.33%, 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=14.23%, ctx=203, 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=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=3295KiB/s (3374kB/s), 362KiB/s-1153KiB/s (370kB/s-1181kB/s), io=20.0MiB (20.0MB), run=4779-6216msec WRITE: bw=4613KiB/s (4723kB/s), 824KiB/s-1809KiB/s (843kB/s-1852kB/s), io=28.0MiB (29.4MB), run=4779-6216msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145449: Mon Aug 31 15:42:32 2026 read: IOPS=1, BW=1079KiB/s (1105kB/s)(7168KiB/6643msec) clat (msec): min=83, max=2608, avg=624.13, stdev=921.85 lat (msec): min=83, max=2608, avg=624.13, stdev=921.85 clat percentiles (msec): | 1.00th=[ 85], 5.00th=[ 85], 10.00th=[ 85], 20.00th=[ 97], | 30.00th=[ 107], 40.00th=[ 107], 50.00th=[ 228], 60.00th=[ 334], | 70.00th=[ 334], 80.00th=[ 911], 90.00th=[ 2601], 95.00th=[ 2601], | 99.00th=[ 2601], 99.50th=[ 2601], 99.90th=[ 2601], 99.95th=[ 2601], | 99.99th=[ 2601] bw ( KiB/s): min= 1391, max= 2027, per=60.81%, avg=1874.20, stdev=271.01, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 write: IOPS=0, BW=771KiB/s (789kB/s)(5120KiB/6643msec); 0 zone resets clat (msec): min=197, max=922, avg=397.90, stdev=303.97 lat (msec): min=201, max=922, avg=398.66, stdev=303.43 clat percentiles (msec): | 1.00th=[ 199], 5.00th=[ 199], 10.00th=[ 199], 20.00th=[ 199], | 30.00th=[ 211], 40.00th=[ 211], 50.00th=[ 259], 60.00th=[ 259], | 70.00th=[ 401], 80.00th=[ 401], 90.00th=[ 927], 95.00th=[ 927], | 99.00th=[ 927], 99.50th=[ 927], 99.90th=[ 927], 99.95th=[ 927], | 99.99th=[ 927] bw ( KiB/s): min= 1965, max= 4096, per=62.07%, avg=2679.00, stdev=1227.17, samples=3 iops : min= 1, max= 4, avg= 2.00, stdev= 1.73, samples=3 lat (msec) : 100=16.67%, 250=33.33%, 500=25.00%, 1000=16.67%, >=2000=8.33% cpu : usr=0.00%, sys=3.13%, ctx=104, 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=145450: Mon Aug 31 15:42:32 2026 read: IOPS=0, BW=334KiB/s (342kB/s)(2048KiB/6131msec) clat (msec): min=78, max=341, avg=210.08, stdev=186.18 lat (msec): min=78, max=341, avg=210.09, stdev=186.18 clat percentiles (msec): | 1.00th=[ 79], 5.00th=[ 79], 10.00th=[ 79], 20.00th=[ 79], | 30.00th=[ 79], 40.00th=[ 79], 50.00th=[ 79], 60.00th=[ 342], | 70.00th=[ 342], 80.00th=[ 342], 90.00th=[ 342], 95.00th=[ 342], | 99.00th=[ 342], 99.50th=[ 342], 99.90th=[ 342], 99.95th=[ 342], | 99.99th=[ 342] bw ( KiB/s): min= 1416, max= 2043, per=56.12%, avg=1729.50, stdev=443.36, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1670KiB/s (1710kB/s)(10.0MiB/6131msec); 0 zone resets clat (msec): min=102, max=2291, avg=545.00, stdev=654.94 lat (msec): min=103, max=2291, avg=545.11, stdev=654.95 clat percentiles (msec): | 1.00th=[ 104], 5.00th=[ 104], 10.00th=[ 104], 20.00th=[ 115], | 30.00th=[ 167], 40.00th=[ 236], 50.00th=[ 288], 60.00th=[ 384], | 70.00th=[ 498], 80.00th=[ 523], 90.00th=[ 852], 95.00th=[ 2299], | 99.00th=[ 2299], 99.50th=[ 2299], 99.90th=[ 2299], 99.95th=[ 2299], | 99.99th=[ 2299] bw ( KiB/s): min= 2027, max= 6107, per=75.55%, avg=3260.60, stdev=1822.19, samples=5 iops : min= 1, max= 5, avg= 2.20, stdev= 1.79, samples=5 lat (msec) : 100=8.33%, 250=33.33%, 500=33.33%, 750=8.33%, 1000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.02%, sys=3.51%, ctx=80, 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=145453: Mon Aug 31 15:42:32 2026 read: IOPS=0, BW=996KiB/s (1020kB/s)(6144KiB/6166msec) clat (msec): min=88, max=310, avg=166.64, stdev=82.94 lat (msec): min=88, max=310, avg=166.65, stdev=82.94 clat percentiles (msec): | 1.00th=[ 89], 5.00th=[ 89], 10.00th=[ 89], 20.00th=[ 93], | 30.00th=[ 93], 40.00th=[ 142], 50.00th=[ 142], 60.00th=[ 163], | 70.00th=[ 205], 80.00th=[ 205], 90.00th=[ 313], 95.00th=[ 313], | 99.00th=[ 313], 99.50th=[ 313], 99.90th=[ 313], 99.95th=[ 313], | 99.99th=[ 313] bw ( KiB/s): min= 1996, max= 6119, per=100.00%, avg=3386.00, stdev=2366.96, samples=3 iops : min= 1, max= 5, avg= 2.33, stdev= 2.31, samples=3 write: IOPS=0, BW=996KiB/s (1020kB/s)(6144KiB/6166msec); 0 zone resets clat (msec): min=139, max=2373, avg=852.34, stdev=824.58 lat (msec): min=139, max=2373, avg=852.41, stdev=824.59 clat percentiles (msec): | 1.00th=[ 140], 5.00th=[ 140], 10.00th=[ 140], 20.00th=[ 178], | 30.00th=[ 178], 40.00th=[ 592], 50.00th=[ 592], 60.00th=[ 768], | 70.00th=[ 1070], 80.00th=[ 1070], 90.00th=[ 2366], 95.00th=[ 2366], | 99.00th=[ 2366], 99.50th=[ 2366], 99.90th=[ 2366], 99.95th=[ 2366], | 99.99th=[ 2366] bw ( KiB/s): min= 1404, max= 2043, per=43.99%, avg=1898.60, stdev=277.18, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 lat (msec) : 100=16.67%, 250=41.67%, 500=8.33%, 750=8.33%, 1000=8.33% lat (msec) : 2000=8.33%, >=2000=8.33% cpu : usr=0.03%, sys=2.45%, ctx=67, 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=145455: Mon Aug 31 15:42:32 2026 read: IOPS=0, BW=797KiB/s (816kB/s)(5120KiB/6428msec) clat (msec): min=80, max=419, avg=152.80, stdev=149.07 lat (msec): min=80, max=419, avg=152.81, stdev=149.07 clat percentiles (msec): | 1.00th=[ 81], 5.00th=[ 81], 10.00th=[ 81], 20.00th=[ 81], | 30.00th=[ 85], 40.00th=[ 85], 50.00th=[ 89], 60.00th=[ 89], | 70.00th=[ 91], 80.00th=[ 91], 90.00th=[ 418], 95.00th=[ 418], | 99.00th=[ 418], 99.50th=[ 418], 99.90th=[ 418], 99.95th=[ 418], | 99.99th=[ 418] bw ( KiB/s): min= 4079, max= 4087, per=100.00%, avg=4083.00, stdev= 5.66, samples=2 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1115KiB/s (1142kB/s)(7168KiB/6428msec); 0 zone resets clat (msec): min=276, max=2671, avg=783.21, stdev=862.96 lat (msec): min=276, max=2671, avg=783.39, stdev=862.92 clat percentiles (msec): | 1.00th=[ 275], 5.00th=[ 275], 10.00th=[ 275], 20.00th=[ 284], | 30.00th=[ 330], 40.00th=[ 330], 50.00th=[ 472], 60.00th=[ 527], | 70.00th=[ 527], 80.00th=[ 927], 90.00th=[ 2668], 95.00th=[ 2668], | 99.00th=[ 2668], 99.50th=[ 2668], 99.90th=[ 2668], 99.95th=[ 2668], | 99.99th=[ 2668] bw ( KiB/s): min= 1396, max= 2048, per=44.52%, avg=1921.50, stdev=258.77, samples=6 iops : min= 1, max= 2, avg= 1.17, stdev= 0.41, samples=6 lat (msec) : 100=33.33%, 500=41.67%, 750=8.33%, 1000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=3.13%, ctx=87, 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=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=3083KiB/s (3157kB/s), 334KiB/s-1079KiB/s (342kB/s-1105kB/s), io=20.0MiB (20.0MB), run=6131-6643msec WRITE: bw=4316KiB/s (4420kB/s), 771KiB/s-1670KiB/s (789kB/s-1710kB/s), io=28.0MiB (29.4MB), run=6131-6643msec 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=145464: Mon Aug 31 15:42:43 2026 read: IOPS=1, BW=7267KiB/s (7441kB/s)(12.0MiB/1691msec) clat (msec): min=253, max=1032, avg=542.22, stdev=427.12 lat (msec): min=253, max=1032, avg=542.22, stdev=427.12 clat percentiles (msec): | 1.00th=[ 253], 5.00th=[ 253], 10.00th=[ 253], 20.00th=[ 253], | 30.00th=[ 253], 40.00th=[ 342], 50.00th=[ 342], 60.00th=[ 342], | 70.00th=[ 1036], 80.00th=[ 1036], 90.00th=[ 1036], 95.00th=[ 1036], | 99.00th=[ 1036], 99.50th=[ 1036], 99.90th=[ 1036], 99.95th=[ 1036], | 99.99th=[ 1036] bw ( KiB/s): min= 6311, max= 8192, per=100.00%, avg=7251.50, stdev=1330.07, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 500=66.67%, 2000=33.33% cpu : usr=0.00%, sys=7.81%, ctx=67, majf=0, minf=9 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=145465: Mon Aug 31 15:42:43 2026 read: IOPS=0, BW=1415KiB/s (1449kB/s)(4096KiB/2894msec) clat (nsec): min=568566k, max=568566k, avg=568565639.00, stdev= 0.00 lat (nsec): min=568568k, max=568568k, avg=568568436.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 567], 5.00th=[ 567], 10.00th=[ 567], 20.00th=[ 567], | 30.00th=[ 567], 40.00th=[ 567], 50.00th=[ 567], 60.00th=[ 567], | 70.00th=[ 567], 80.00th=[ 567], 90.00th=[ 567], 95.00th=[ 567], | 99.00th=[ 567], 99.50th=[ 567], 99.90th=[ 567], 99.95th=[ 567], | 99.99th=[ 567] bw ( KiB/s): min= 8175, max= 8175, per=100.00%, avg=8175.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2831KiB/s (2899kB/s)(8192KiB/2894msec); 0 zone resets clat (msec): min=772, max=1364, avg=1068.68, stdev=418.18 lat (msec): min=773, max=1364, avg=1069.08, stdev=418.35 clat percentiles (msec): | 1.00th=[ 776], 5.00th=[ 776], 10.00th=[ 776], 20.00th=[ 776], | 30.00th=[ 776], 40.00th=[ 776], 50.00th=[ 776], 60.00th=[ 1368], | 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= 7922, max= 7922, per=98.94%, avg=7922.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 750=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=7.19%, ctx=53, 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=145466: Mon Aug 31 15:42:43 2026 write: IOPS=0, BW=3003KiB/s (3075kB/s)(12.0MiB/4092msec); 0 zone resets clat (msec): min=865, max=1619, avg=1346.50, stdev=417.73 lat (msec): min=865, max=1619, avg=1346.76, stdev=417.80 clat percentiles (msec): | 1.00th=[ 869], 5.00th=[ 869], 10.00th=[ 869], 20.00th=[ 869], | 30.00th=[ 869], 40.00th=[ 1552], 50.00th=[ 1552], 60.00th=[ 1552], | 70.00th=[ 1620], 80.00th=[ 1620], 90.00th=[ 1620], 95.00th=[ 1620], | 99.00th=[ 1620], 99.50th=[ 1620], 99.90th=[ 1620], 99.95th=[ 1620], | 99.99th=[ 1620] bw ( KiB/s): min= 8000, max= 8094, per=100.00%, avg=8047.00, stdev=66.47, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 1000=33.33%, 2000=66.67% cpu : usr=0.00%, sys=5.35%, ctx=77, 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=145467: Mon Aug 31 15:42:43 2026 write: IOPS=1, BW=5036KiB/s (5157kB/s)(12.0MiB/2440msec); 0 zone resets clat (msec): min=431, max=1458, avg=779.72, stdev=588.03 lat (msec): min=431, max=1459, avg=780.02, stdev=588.09 clat percentiles (msec): | 1.00th=[ 430], 5.00th=[ 430], 10.00th=[ 430], 20.00th=[ 430], | 30.00th=[ 430], 40.00th=[ 451], 50.00th=[ 451], 60.00th=[ 451], | 70.00th=[ 1452], 80.00th=[ 1452], 90.00th=[ 1452], 95.00th=[ 1452], | 99.00th=[ 1452], 99.50th=[ 1452], 99.90th=[ 1452], 99.95th=[ 1452], | 99.99th=[ 1452] bw ( KiB/s): min=16384, max=16384, per=100.00%, avg=16384.00, stdev= 0.00, samples=1 iops : min= 4, max= 4, avg= 4.00, stdev= 0.00, samples=1 lat (msec) : 500=66.67%, 2000=33.33% cpu : usr=0.00%, sys=6.27%, ctx=39, 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=5661KiB/s (5797kB/s), 1415KiB/s-7267KiB/s (1449kB/s-7441kB/s), io=16.0MiB (16.8MB), run=1691-2894msec WRITE: bw=8008KiB/s (8200kB/s), 2831KiB/s-5036KiB/s (2899kB/s-5157kB/s), io=32.0MiB (33.6MB), run=2440-4092msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145469: Mon Aug 31 15:42:43 2026 read: IOPS=0, BW=3961KiB/s (4056kB/s)(12.0MiB/3102msec) clat (msec): min=874, max=1012, avg=936.90, stdev=69.88 lat (msec): min=874, max=1012, avg=936.91, stdev=69.88 clat percentiles (msec): | 1.00th=[ 877], 5.00th=[ 877], 10.00th=[ 877], 20.00th=[ 877], | 30.00th=[ 877], 40.00th=[ 927], 50.00th=[ 927], 60.00th=[ 927], | 70.00th=[ 1011], 80.00th=[ 1011], 90.00th=[ 1011], 95.00th=[ 1011], | 99.00th=[ 1011], 99.50th=[ 1011], 99.90th=[ 1011], 99.95th=[ 1011], | 99.99th=[ 1011] bw ( KiB/s): min= 7922, max= 8110, per=100.00%, avg=8042.00, stdev=104.23, samples=3 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=3 lat (msec) : 1000=66.67%, 2000=33.33% cpu : usr=0.00%, sys=10.96%, ctx=247, 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=145470: Mon Aug 31 15:42:43 2026 read: IOPS=0, BW=1206KiB/s (1235kB/s)(4096KiB/3397msec) clat (nsec): min=908279k, max=908279k, avg=908279082.00, stdev= 0.00 lat (nsec): min=908282k, max=908282k, avg=908281526.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 911], 5.00th=[ 911], 10.00th=[ 911], 20.00th=[ 911], | 30.00th=[ 911], 40.00th=[ 911], 50.00th=[ 911], 60.00th=[ 911], | 70.00th=[ 911], 80.00th=[ 911], 90.00th=[ 911], 95.00th=[ 911], | 99.00th=[ 911], 99.50th=[ 911], 99.90th=[ 911], 99.95th=[ 911], | 99.99th=[ 911] 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 write: IOPS=0, BW=2412KiB/s (2469kB/s)(8192KiB/3397msec); 0 zone resets clat (msec): min=676, max=1417, avg=1046.99, stdev=523.73 lat (msec): min=676, max=1417, avg=1047.32, stdev=523.88 clat percentiles (msec): | 1.00th=[ 676], 5.00th=[ 676], 10.00th=[ 676], 20.00th=[ 676], | 30.00th=[ 676], 40.00th=[ 676], 50.00th=[ 676], 60.00th=[ 1418], | 70.00th=[ 1418], 80.00th=[ 1418], 90.00th=[ 1418], 95.00th=[ 1418], | 99.00th=[ 1418], 99.50th=[ 1418], 99.90th=[ 1418], 99.95th=[ 1418], | 99.99th=[ 1418] bw ( KiB/s): min= 8175, max= 8175, per=100.00%, avg=8175.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 750=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=4.53%, ctx=147, 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=145471: Mon Aug 31 15:42:43 2026 write: IOPS=0, BW=2842KiB/s (2911kB/s)(12.0MiB/4323msec); 0 zone resets clat (msec): min=545, max=1784, avg=1355.06, stdev=701.90 lat (msec): min=545, max=1785, avg=1355.58, stdev=702.07 clat percentiles (msec): | 1.00th=[ 542], 5.00th=[ 542], 10.00th=[ 542], 20.00th=[ 542], | 30.00th=[ 542], 40.00th=[ 1737], 50.00th=[ 1737], 60.00th=[ 1737], | 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= 8175, max= 8192, per=100.00%, avg=8183.50, stdev=12.02, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 750=33.33%, 2000=66.67% cpu : usr=0.00%, sys=2.82%, ctx=49, 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=145472: Mon Aug 31 15:42:43 2026 write: IOPS=1, BW=4430KiB/s (4536kB/s)(12.0MiB/2774msec); 0 zone resets clat (msec): min=370, max=1419, avg=900.46, stdev=524.60 lat (msec): min=370, max=1420, avg=900.80, stdev=524.75 clat percentiles (msec): | 1.00th=[ 372], 5.00th=[ 372], 10.00th=[ 372], 20.00th=[ 372], | 30.00th=[ 372], 40.00th=[ 911], 50.00th=[ 911], 60.00th=[ 911], | 70.00th=[ 1418], 80.00th=[ 1418], 90.00th=[ 1418], 95.00th=[ 1418], | 99.00th=[ 1418], 99.50th=[ 1418], 99.90th=[ 1418], 99.95th=[ 1418], | 99.99th=[ 1418] bw ( KiB/s): min= 8094, max= 8126, per=100.00%, avg=8110.00, stdev=22.63, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=4.90%, ctx=54, 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=4823KiB/s (4939kB/s), 1206KiB/s-3961KiB/s (1235kB/s-4056kB/s), io=16.0MiB (16.8MB), run=3102-3397msec WRITE: bw=7580KiB/s (7762kB/s), 2412KiB/s-4430KiB/s (2469kB/s-4536kB/s), io=32.0MiB (33.6MB), run=2774-4323msec