== sanity test 398b: DIO and buffer IO race ============== 16:28:58 (1788640138) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 5.20238 s, 9.7 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=145436: Sat Sep 5 16:31:33 2026 read: IOPS=11, BW=44.8KiB/s (45.9kB/s)(5992KiB/133762msec) clat (usec): min=32, max=834826, avg=43102.15, stdev=42046.07 lat (usec): min=32, max=834828, avg=43108.78, stdev=42044.10 clat percentiles (usec): | 1.00th=[ 51], 5.00th=[ 61], 10.00th=[ 167], 20.00th=[ 18482], | 30.00th=[ 25035], 40.00th=[ 30016], 50.00th=[ 35390], 60.00th=[ 41681], | 70.00th=[ 50594], 80.00th=[ 61604], 90.00th=[ 82314], 95.00th=[105382], | 99.00th=[162530], 99.50th=[227541], 99.90th=[492831], 99.95th=[834667], | 99.99th=[834667] bw ( KiB/s): min= 7, max= 119, per=25.84%, avg=44.97, stdev=21.73, samples=260 iops : min= 1, max= 29, avg=10.61, stdev= 5.49, samples=260 write: IOPS=11, BW=47.1KiB/s (48.2kB/s)(6296KiB/133762msec); 0 zone resets clat (usec): min=1021, max=656148, avg=43686.57, stdev=49728.50 lat (usec): min=1021, max=656149, avg=43688.82, stdev=49728.41 clat percentiles (usec): | 1.00th=[ 1106], 5.00th=[ 1254], 10.00th=[ 1795], 20.00th=[ 4015], | 30.00th=[ 8717], 40.00th=[ 18744], 50.00th=[ 31851], 60.00th=[ 43779], | 70.00th=[ 56361], 80.00th=[ 74974], 90.00th=[103285], 95.00th=[129500], | 99.00th=[204473], 99.50th=[274727], 99.90th=[492831], 99.95th=[658506], | 99.99th=[658506] bw ( KiB/s): min= 7, max= 143, per=25.64%, avg=46.92, stdev=21.71, samples=262 iops : min= 1, max= 35, avg=11.08, stdev= 5.46, samples=262 lat (usec) : 50=0.39%, 100=3.94%, 250=0.65%, 500=0.07%, 750=0.10% lat (usec) : 1000=0.03% lat (msec) : 2=5.60%, 4=4.62%, 10=6.54%, 20=9.77%, 50=35.25% lat (msec) : 100=24.77%, 250=7.81%, 500=0.39%, 750=0.03%, 1000=0.03% cpu : usr=0.09%, sys=5.12%, ctx=6469, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1498,1574,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145437: Sat Sep 5 16:31:33 2026 read: IOPS=11, BW=44.3KiB/s (45.4kB/s)(5940KiB/133982msec) clat (usec): min=26, max=480162, avg=44017.99, stdev=37057.57 lat (usec): min=26, max=480163, avg=44020.22, stdev=37057.39 clat percentiles (usec): | 1.00th=[ 49], 5.00th=[ 62], 10.00th=[ 660], 20.00th=[ 18744], | 30.00th=[ 24511], 40.00th=[ 29754], 50.00th=[ 35914], 60.00th=[ 43254], | 70.00th=[ 54264], 80.00th=[ 65799], 90.00th=[ 85459], 95.00th=[105382], | 99.00th=[162530], 99.50th=[210764], 99.90th=[358613], 99.95th=[480248], | 99.99th=[480248] bw ( KiB/s): min= 7, max= 126, per=25.48%, avg=44.34, stdev=20.99, samples=260 iops : min= 1, max= 31, avg=10.44, stdev= 5.29, samples=260 write: IOPS=11, BW=47.4KiB/s (48.5kB/s)(6348KiB/133982msec); 0 zone resets clat (usec): min=1004, max=899346, avg=42950.10, stdev=48850.35 lat (usec): min=1005, max=899348, avg=42966.26, stdev=48850.01 clat percentiles (usec): | 1.00th=[ 1074], 5.00th=[ 1237], 10.00th=[ 1795], 20.00th=[ 4686], | 30.00th=[ 9110], 40.00th=[ 19268], 50.00th=[ 31327], 60.00th=[ 41681], | 70.00th=[ 55313], 80.00th=[ 73925], 90.00th=[103285], 95.00th=[128451], | 99.00th=[189793], 99.50th=[238027], 99.90th=[333448], 99.95th=[901776], | 99.99th=[901776] bw ( KiB/s): min= 7, max= 135, per=25.65%, avg=46.95, stdev=21.73, samples=262 iops : min= 1, max= 33, avg=11.09, stdev= 5.48, samples=262 lat (usec) : 50=0.59%, 100=3.58%, 250=0.42%, 500=0.20%, 750=0.07% lat (msec) : 2=5.73%, 4=3.55%, 10=7.45%, 20=9.96%, 50=34.70% lat (msec) : 100=24.97%, 250=8.43%, 500=0.33%, 1000=0.03% cpu : usr=0.08%, sys=5.09%, ctx=6528, 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=145438: Sat Sep 5 16:31:33 2026 read: IOPS=10, BW=43.9KiB/s (44.9kB/s)(6028KiB/137358msec) clat (usec): min=26, max=897558, avg=43782.92, stdev=41667.68 lat (usec): min=27, max=897558, avg=43785.74, stdev=41668.40 clat percentiles (usec): | 1.00th=[ 51], 5.00th=[ 62], 10.00th=[ 1991], 20.00th=[ 17957], | 30.00th=[ 23987], 40.00th=[ 29230], 50.00th=[ 35914], 60.00th=[ 43254], | 70.00th=[ 52691], 80.00th=[ 65274], 90.00th=[ 84411], 95.00th=[108528], | 99.00th=[160433], 99.50th=[183501], 99.90th=[513803], 99.95th=[893387], | 99.99th=[893387] bw ( KiB/s): min= 7, max= 119, per=25.17%, avg=43.80, stdev=21.64, samples=268 iops : min= 1, max= 29, avg=10.30, stdev= 5.45, samples=268 write: IOPS=11, BW=45.6KiB/s (46.7kB/s)(6260KiB/137358msec); 0 zone resets clat (usec): min=1026, max=476215, avg=45350.52, stdev=48585.68 lat (usec): min=1028, max=476217, avg=45359.41, stdev=48589.42 clat percentiles (usec): | 1.00th=[ 1090], 5.00th=[ 1221], 10.00th=[ 1745], 20.00th=[ 4752], | 30.00th=[ 10028], 40.00th=[ 20841], 50.00th=[ 33424], 60.00th=[ 45876], | 70.00th=[ 57934], 80.00th=[ 77071], 90.00th=[106431], 95.00th=[131597], | 99.00th=[204473], 99.50th=[252707], 99.90th=[471860], 99.95th=[476054], | 99.99th=[476054] bw ( KiB/s): min= 7, max= 151, per=24.69%, avg=45.17, stdev=22.19, samples=270 iops : min= 1, max= 37, avg=10.64, stdev= 5.58, samples=270 lat (usec) : 50=0.49%, 100=3.78%, 250=0.23%, 500=0.10%, 750=0.07% lat (usec) : 1000=0.07% lat (msec) : 2=5.96%, 4=3.52%, 10=6.48%, 20=10.55%, 50=34.34% lat (msec) : 100=25.26%, 250=8.85%, 500=0.26%, 750=0.03%, 1000=0.03% cpu : usr=0.07%, sys=4.93%, ctx=6612, 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=145439: Sat Sep 5 16:31:33 2026 read: IOPS=11, BW=44.7KiB/s (45.8kB/s)(6052KiB/135423msec) clat (usec): min=32, max=450967, avg=41742.58, stdev=34845.24 lat (usec): min=33, max=450968, avg=41743.97, stdev=34845.33 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 62], 10.00th=[ 180], 20.00th=[ 18482], | 30.00th=[ 23725], 40.00th=[ 28443], 50.00th=[ 34341], 60.00th=[ 41681], | 70.00th=[ 50070], 80.00th=[ 61080], 90.00th=[ 80217], 95.00th=[106431], | 99.00th=[145753], 99.50th=[189793], 99.90th=[341836], 99.95th=[450888], | 99.99th=[450888] bw ( KiB/s): min= 7, max= 135, per=26.17%, avg=45.53, stdev=21.58, samples=259 iops : min= 1, max= 33, avg=10.74, stdev= 5.43, samples=259 write: IOPS=11, BW=46.0KiB/s (47.2kB/s)(6236KiB/135423msec); 0 zone resets clat (usec): min=944, max=1084.5k, avg=46084.35, stdev=55057.87 lat (usec): min=946, max=1084.5k, avg=46089.24, stdev=55056.78 clat percentiles (usec): | 1.00th=[ 1106], 5.00th=[ 1254], 10.00th=[ 1893], | 20.00th=[ 4424], 30.00th=[ 10028], 40.00th=[ 21890], | 50.00th=[ 33162], 60.00th=[ 43779], 70.00th=[ 56886], | 80.00th=[ 77071], 90.00th=[ 107480], 95.00th=[ 139461], | 99.00th=[ 233833], 99.50th=[ 270533], 99.90th=[ 341836], | 99.95th=[1082131], 99.99th=[1082131] bw ( KiB/s): min= 7, max= 111, per=25.13%, avg=46.00, stdev=20.16, samples=264 iops : min= 1, max= 27, avg=10.86, stdev= 5.09, samples=264 lat (usec) : 50=0.39%, 100=4.04%, 250=0.65%, 500=0.13%, 750=0.10% lat (usec) : 1000=0.10% lat (msec) : 2=5.37%, 4=3.91%, 10=6.25%, 20=9.70%, 50=36.85% lat (msec) : 100=23.60%, 250=8.53%, 500=0.36%, 2000=0.03% cpu : usr=0.08%, sys=5.18%, ctx=6569, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1513,1559,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=175KiB/s (179kB/s), 43.9KiB/s-44.8KiB/s (44.9kB/s-45.9kB/s), io=23.4MiB (24.6MB), run=133762-137358msec WRITE: bw=183KiB/s (187kB/s), 45.6KiB/s-47.4KiB/s (46.7kB/s-48.5kB/s), io=24.6MiB (25.7MB), run=133762-137358msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145440: Sat Sep 5 16:33:59 2026 read: IOPS=5, BW=21.3KiB/s (21.8kB/s)(5992KiB/281055msec) clat (msec): min=4, max=868, avg=35.60, stdev=43.50 lat (msec): min=4, max=868, avg=35.60, stdev=43.50 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 16], 40.00th=[ 19], 50.00th=[ 23], 60.00th=[ 27], | 70.00th=[ 34], 80.00th=[ 46], 90.00th=[ 79], 95.00th=[ 109], | 99.00th=[ 180], 99.50th=[ 220], 99.90th=[ 422], 99.95th=[ 869], | 99.99th=[ 869] bw ( KiB/s): min= 7, max= 87, per=28.67%, avg=24.08, stdev=16.56, samples=480 iops : min= 1, max= 21, avg= 5.38, stdev= 4.19, samples=480 write: IOPS=5, BW=22.4KiB/s (22.9kB/s)(6296KiB/281055msec); 0 zone resets clat (msec): min=34, max=797, avg=144.46, stdev=74.58 lat (msec): min=34, max=797, avg=144.47, stdev=74.59 clat percentiles (msec): | 1.00th=[ 54], 5.00th=[ 66], 10.00th=[ 74], 20.00th=[ 87], | 30.00th=[ 99], 40.00th=[ 111], 50.00th=[ 126], 60.00th=[ 142], | 70.00th=[ 161], 80.00th=[ 192], 90.00th=[ 245], 95.00th=[ 288], | 99.00th=[ 397], 99.50th=[ 447], 99.90th=[ 584], 99.95th=[ 802], | 99.99th=[ 802] bw ( KiB/s): min= 7, max= 48, per=25.09%, avg=22.08, stdev=10.51, samples=548 iops : min= 1, max= 12, avg= 4.88, stdev= 2.70, samples=548 lat (msec) : 10=4.23%, 20=17.29%, 50=18.78%, 100=21.52%, 250=33.24% lat (msec) : 500=4.75%, 750=0.13%, 1000=0.07% cpu : usr=0.04%, sys=1.05%, ctx=5077, 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=145441: Sat Sep 5 16:33:59 2026 read: IOPS=5, BW=21.0KiB/s (21.5kB/s)(5940KiB/282799msec) clat (msec): min=5, max=930, avg=35.38, stdev=44.48 lat (msec): min=5, max=930, avg=35.38, stdev=44.48 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 16], 40.00th=[ 19], 50.00th=[ 23], 60.00th=[ 27], | 70.00th=[ 34], 80.00th=[ 46], 90.00th=[ 79], 95.00th=[ 105], | 99.00th=[ 174], 99.50th=[ 275], 99.90th=[ 447], 99.95th=[ 927], | 99.99th=[ 927] bw ( KiB/s): min= 7, max= 87, per=28.67%, avg=24.08, stdev=16.85, samples=475 iops : min= 1, max= 21, avg= 5.38, stdev= 4.25, samples=475 write: IOPS=5, BW=22.4KiB/s (22.0kB/s)(6348KiB/282799msec); 0 zone resets clat (msec): min=37, max=669, avg=144.89, stdev=73.60 lat (msec): min=37, max=669, avg=144.89, stdev=73.60 clat percentiles (msec): | 1.00th=[ 52], 5.00th=[ 63], 10.00th=[ 74], 20.00th=[ 88], | 30.00th=[ 101], 40.00th=[ 112], 50.00th=[ 127], 60.00th=[ 142], | 70.00th=[ 163], 80.00th=[ 192], 90.00th=[ 245], 95.00th=[ 292], | 99.00th=[ 393], 99.50th=[ 451], 99.90th=[ 575], 99.95th=[ 667], | 99.99th=[ 667] bw ( KiB/s): min= 7, max= 56, per=25.31%, avg=22.27, stdev=10.36, samples=547 iops : min= 1, max= 14, avg= 4.93, stdev= 2.66, samples=547 lat (msec) : 10=4.10%, 20=17.15%, 50=18.62%, 100=21.03%, 250=33.92% lat (msec) : 500=5.01%, 750=0.13%, 1000=0.03% cpu : usr=0.04%, sys=1.05%, ctx=5149, 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=145442: Sat Sep 5 16:33:59 2026 read: IOPS=5, BW=21.4KiB/s (21.9kB/s)(6028KiB/282244msec) clat (msec): min=5, max=489, avg=36.49, stdev=40.42 lat (msec): min=5, max=489, avg=36.50, stdev=40.42 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 10], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 20], 50.00th=[ 24], 60.00th=[ 28], | 70.00th=[ 35], 80.00th=[ 49], 90.00th=[ 82], 95.00th=[ 110], | 99.00th=[ 186], 99.50th=[ 257], 99.90th=[ 443], 99.95th=[ 489], | 99.99th=[ 489] bw ( KiB/s): min= 7, max= 95, per=28.51%, avg=23.95, stdev=16.66, samples=485 iops : min= 1, max= 23, avg= 5.35, stdev= 4.21, samples=485 write: IOPS=5, BW=22.2KiB/s (22.7kB/s)(6260KiB/282244msec); 0 zone resets clat (msec): min=37, max=990, avg=144.99, stdev=77.40 lat (msec): min=37, max=990, avg=144.99, stdev=77.40 clat percentiles (msec): | 1.00th=[ 52], 5.00th=[ 65], 10.00th=[ 73], 20.00th=[ 87], | 30.00th=[ 100], 40.00th=[ 114], 50.00th=[ 126], 60.00th=[ 142], | 70.00th=[ 163], 80.00th=[ 194], 90.00th=[ 243], 95.00th=[ 279], | 99.00th=[ 426], 99.50th=[ 485], 99.90th=[ 802], 99.95th=[ 995], | 99.99th=[ 995] bw ( KiB/s): min= 7, max= 55, per=24.94%, avg=21.95, stdev=10.66, samples=547 iops : min= 1, max= 13, avg= 4.85, stdev= 2.74, samples=547 lat (msec) : 10=3.42%, 20=16.67%, 50=19.92%, 100=21.65%, 250=33.59% lat (msec) : 500=4.59%, 750=0.10%, 1000=0.07% cpu : usr=0.04%, sys=1.06%, ctx=5064, 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=145443: Sat Sep 5 16:33:59 2026 read: IOPS=5, BW=21.5KiB/s (22.0kB/s)(6052KiB/281206msec) clat (msec): min=5, max=495, avg=36.05, stdev=40.59 lat (msec): min=5, max=495, avg=36.05, stdev=40.59 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 16], 40.00th=[ 19], 50.00th=[ 23], 60.00th=[ 27], | 70.00th=[ 33], 80.00th=[ 49], 90.00th=[ 83], 95.00th=[ 112], | 99.00th=[ 197], 99.50th=[ 279], 99.90th=[ 372], 99.95th=[ 498], | 99.99th=[ 498] bw ( KiB/s): min= 7, max= 102, per=29.76%, avg=25.00, stdev=16.94, samples=467 iops : min= 1, max= 25, avg= 5.62, stdev= 4.29, samples=467 write: IOPS=5, BW=22.2KiB/s (22.7kB/s)(6236KiB/281206msec); 0 zone resets clat (msec): min=32, max=1076, avg=145.20, stdev=78.20 lat (msec): min=32, max=1076, avg=145.21, stdev=78.21 clat percentiles (msec): | 1.00th=[ 52], 5.00th=[ 67], 10.00th=[ 75], 20.00th=[ 89], | 30.00th=[ 102], 40.00th=[ 113], 50.00th=[ 127], 60.00th=[ 140], | 70.00th=[ 161], 80.00th=[ 190], 90.00th=[ 234], 95.00th=[ 284], | 99.00th=[ 422], 99.50th=[ 498], 99.90th=[ 793], 99.95th=[ 1083], | 99.99th=[ 1083] bw ( KiB/s): min= 7, max= 48, per=25.34%, avg=22.30, stdev=10.31, samples=537 iops : min= 1, max= 12, avg= 4.93, stdev= 2.65, samples=537 lat (msec) : 10=4.36%, 20=17.42%, 50=18.23%, 100=20.70%, 250=34.73% lat (msec) : 500=4.33%, 750=0.16%, 1000=0.03%, 2000=0.03% cpu : usr=0.04%, sys=1.08%, ctx=5095, 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=84.9KiB/s (86.9kB/s), 21.0KiB/s-21.5KiB/s (21.5kB/s-22.0kB/s), io=23.4MiB (24.6MB), run=281055-282799msec WRITE: bw=88.9KiB/s (91.0kB/s), 22.2KiB/s-22.4KiB/s (22.7kB/s-22.0kB/s), io=24.6MiB (25.7MB), run=281055-282799msec 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=145507: Sat Sep 5 16:34:37 2026 read: IOPS=13, BW=214KiB/s (220kB/s)(5920KiB/27612msec) clat (usec): min=38, max=178974, avg=37421.29, stdev=31253.15 lat (usec): min=38, max=178976, avg=37422.32, stdev=31253.14 clat percentiles (usec): | 1.00th=[ 40], 5.00th=[ 56], 10.00th=[ 63], 20.00th=[ 88], | 30.00th=[ 22152], 40.00th=[ 28705], 50.00th=[ 33162], 60.00th=[ 39584], | 70.00th=[ 47449], 80.00th=[ 56886], 90.00th=[ 81265], 95.00th=[ 95945], | 99.00th=[143655], 99.50th=[164627], 99.90th=[179307], 99.95th=[179307], | 99.99th=[179307] bw ( KiB/s): min= 31, max= 509, per=26.33%, avg=214.87, stdev=93.72, samples=54 iops : min= 1, max= 31, avg=12.65, stdev= 5.90, samples=54 write: IOPS=14, BW=231KiB/s (236kB/s)(6368KiB/27612msec); 0 zone resets clat (usec): min=1338, max=324119, avg=34417.90, stdev=40354.19 lat (usec): min=1340, max=324122, avg=34421.63, stdev=40355.15 clat percentiles (usec): | 1.00th=[ 1450], 5.00th=[ 1663], 10.00th=[ 2278], 20.00th=[ 5014], | 30.00th=[ 7439], 40.00th=[ 11338], 50.00th=[ 19530], 60.00th=[ 28967], | 70.00th=[ 44827], 80.00th=[ 59507], 90.00th=[ 86508], 95.00th=[114820], | 99.00th=[160433], 99.50th=[242222], 99.90th=[325059], 99.95th=[325059], | 99.99th=[325059] bw ( KiB/s): min= 95, max= 412, per=27.48%, avg=236.06, stdev=87.20, samples=53 iops : min= 5, max= 25, avg=14.00, stdev= 5.53, samples=53 lat (usec) : 50=1.56%, 100=8.33%, 250=0.26%, 500=0.26%, 750=0.13% lat (msec) : 2=4.56%, 4=3.65%, 10=10.94%, 20=10.03%, 50=34.11% lat (msec) : 100=20.70%, 250=5.34%, 500=0.13% cpu : usr=0.09%, sys=6.03%, ctx=1389, 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=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=145508: Sat Sep 5 16:34:37 2026 read: IOPS=13, BW=210KiB/s (215kB/s)(5744KiB/27347msec) clat (usec): min=33, max=333192, avg=36713.00, stdev=34693.63 lat (usec): min=34, max=333193, avg=36722.55, stdev=34697.90 clat percentiles (usec): | 1.00th=[ 41], 5.00th=[ 52], 10.00th=[ 62], 20.00th=[ 76], | 30.00th=[ 18220], 40.00th=[ 27395], 50.00th=[ 32637], 60.00th=[ 40633], | 70.00th=[ 49021], 80.00th=[ 58459], 90.00th=[ 79168], 95.00th=[ 92799], | 99.00th=[147850], 99.50th=[187696], 99.90th=[333448], 99.95th=[333448], | 99.99th=[333448] bw ( KiB/s): min= 54, max= 414, per=26.40%, avg=215.38, stdev=97.43, samples=52 iops : min= 3, max= 25, avg=12.69, stdev= 6.13, samples=52 write: IOPS=14, BW=239KiB/s (245kB/s)(6544KiB/27347msec); 0 zone resets clat (usec): min=1446, max=313061, avg=34549.47, stdev=41785.00 lat (usec): min=1447, max=313062, avg=34554.38, stdev=41784.91 clat percentiles (usec): | 1.00th=[ 1516], 5.00th=[ 1696], 10.00th=[ 2278], 20.00th=[ 4948], | 30.00th=[ 8225], 40.00th=[ 12256], 50.00th=[ 17695], 60.00th=[ 26870], | 70.00th=[ 42206], 80.00th=[ 57410], 90.00th=[ 88605], 95.00th=[115868], | 99.00th=[168821], 99.50th=[177210], 99.90th=[312476], 99.95th=[312476], | 99.99th=[312476] bw ( KiB/s): min= 30, max= 446, per=28.02%, avg=240.66, stdev=104.97, samples=53 iops : min= 1, max= 27, avg=14.28, stdev= 6.64, samples=53 lat (usec) : 50=1.30%, 100=9.77%, 250=0.52%, 1000=0.13% lat (msec) : 2=4.95%, 4=4.56%, 10=10.68%, 20=11.72%, 50=29.69% lat (msec) : 100=20.96%, 250=5.34%, 500=0.39% cpu : usr=0.08%, sys=5.55%, ctx=1329, 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=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=145509: Sat Sep 5 16:34:37 2026 read: IOPS=13, BW=213KiB/s (218kB/s)(6256KiB/29329msec) clat (usec): min=32, max=263700, avg=39149.46, stdev=36774.72 lat (usec): min=32, max=263701, avg=39154.20, stdev=36772.84 clat percentiles (usec): | 1.00th=[ 39], 5.00th=[ 55], 10.00th=[ 61], 20.00th=[ 84], | 30.00th=[ 17695], 40.00th=[ 27657], 50.00th=[ 35390], 60.00th=[ 44303], | 70.00th=[ 52691], 80.00th=[ 61080], 90.00th=[ 78119], 95.00th=[ 95945], | 99.00th=[212861], 99.50th=[248513], 99.90th=[263193], 99.95th=[263193], | 99.99th=[263193] bw ( KiB/s): min= 31, max= 509, per=25.90%, avg=211.33, stdev=95.96, samples=57 iops : min= 1, max= 31, avg=12.40, stdev= 6.04, samples=57 write: IOPS=12, BW=206KiB/s (211kB/s)(6032KiB/29329msec); 0 zone resets clat (usec): min=1403, max=381176, avg=37078.38, stdev=42407.86 lat (usec): min=1405, max=381179, avg=37081.18, stdev=42407.39 clat percentiles (usec): | 1.00th=[ 1483], 5.00th=[ 1729], 10.00th=[ 2343], 20.00th=[ 5473], | 30.00th=[ 8356], 40.00th=[ 12125], 50.00th=[ 22938], 60.00th=[ 35390], | 70.00th=[ 46400], 80.00th=[ 59507], 90.00th=[ 94897], 95.00th=[113771], | 99.00th=[177210], 99.50th=[231736], 99.90th=[379585], 99.95th=[379585], | 99.99th=[379585] bw ( KiB/s): min= 63, max= 470, per=23.37%, avg=200.77, stdev=90.13, samples=57 iops : min= 3, max= 29, avg=11.75, stdev= 5.69, samples=57 lat (usec) : 50=1.82%, 100=9.38%, 250=0.91%, 500=0.13% lat (msec) : 2=4.17%, 4=3.52%, 10=9.64%, 20=9.38%, 50=30.86% lat (msec) : 100=24.48%, 250=5.47%, 500=0.26% cpu : usr=0.07%, sys=5.67%, ctx=1402, 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=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=145510: Sat Sep 5 16:34:37 2026 read: IOPS=14, BW=228KiB/s (233kB/s)(6032KiB/26454msec) clat (usec): min=32, max=224489, avg=36268.98, stdev=33763.38 lat (usec): min=33, max=224491, avg=36269.99, stdev=33763.46 clat percentiles (usec): | 1.00th=[ 40], 5.00th=[ 51], 10.00th=[ 60], 20.00th=[ 75], | 30.00th=[ 17433], 40.00th=[ 24249], 50.00th=[ 31851], 60.00th=[ 40109], | 70.00th=[ 47449], 80.00th=[ 59507], 90.00th=[ 81265], 95.00th=[101188], | 99.00th=[143655], 99.50th=[196084], 99.90th=[225444], 99.95th=[225444], | 99.99th=[225444] bw ( KiB/s): min= 31, max= 541, per=27.90%, avg=227.65, stdev=92.45, samples=52 iops : min= 1, max= 33, avg=13.46, stdev= 5.82, samples=52 write: IOPS=14, BW=236KiB/s (242kB/s)(6256KiB/26454msec); 0 zone resets clat (usec): min=1286, max=278850, avg=32518.55, stdev=37959.57 lat (usec): min=1287, max=278852, avg=32520.63, stdev=37959.56 clat percentiles (usec): | 1.00th=[ 1418], 5.00th=[ 1745], 10.00th=[ 2278], 20.00th=[ 4490], | 30.00th=[ 7111], 40.00th=[ 10290], 50.00th=[ 16909], 60.00th=[ 27919], | 70.00th=[ 39584], 80.00th=[ 57934], 90.00th=[ 85459], 95.00th=[104334], | 99.00th=[173016], 99.50th=[242222], 99.90th=[278922], 99.95th=[278922], | 99.99th=[278922] bw ( KiB/s): min= 63, max= 415, per=27.57%, avg=236.81, stdev=88.15, samples=52 iops : min= 3, max= 25, avg=14.02, stdev= 5.59, samples=52 lat (usec) : 50=2.34%, 100=9.51%, 250=0.65%, 500=0.52%, 750=0.13% lat (msec) : 2=4.95%, 4=4.43%, 10=10.94%, 20=9.64%, 50=31.25% lat (msec) : 100=20.44%, 250=5.08%, 500=0.13% cpu : usr=0.06%, sys=5.99%, ctx=1302, 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=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=817KiB/s (836kB/s), 210KiB/s-228KiB/s (215kB/s-233kB/s), io=23.4MiB (24.5MB), run=26454-29329msec WRITE: bw=859KiB/s (880kB/s), 206KiB/s-239KiB/s (211kB/s-245kB/s), io=24.6MiB (25.8MB), run=26454-29329msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145501: Sat Sep 5 16:35:20 2026 read: IOPS=5, BW=82.5KiB/s (84.4kB/s)(5920KiB/71799msec) clat (msec): min=6, max=421, avg=39.09, stdev=37.11 lat (msec): min=6, max=421, avg=39.09, stdev=37.11 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 12], 10.00th=[ 14], 20.00th=[ 17], | 30.00th=[ 20], 40.00th=[ 24], 50.00th=[ 28], 60.00th=[ 35], | 70.00th=[ 44], 80.00th=[ 53], 90.00th=[ 74], 95.00th=[ 103], | 99.00th=[ 203], 99.50th=[ 243], 99.90th=[ 422], 99.95th=[ 422], | 99.99th=[ 422] bw ( KiB/s): min= 30, max= 415, per=28.62%, avg=93.57, stdev=60.90, samples=124 iops : min= 1, max= 25, avg= 5.07, stdev= 3.84, samples=124 write: IOPS=5, BW=88.7KiB/s (90.8kB/s)(6368KiB/71799msec); 0 zone resets clat (msec): min=39, max=452, avg=143.72, stdev=68.36 lat (msec): min=39, max=452, avg=143.72, stdev=68.36 clat percentiles (msec): | 1.00th=[ 57], 5.00th=[ 69], 10.00th=[ 78], 20.00th=[ 92], | 30.00th=[ 105], 40.00th=[ 115], 50.00th=[ 127], 60.00th=[ 140], | 70.00th=[ 157], 80.00th=[ 184], 90.00th=[ 241], 95.00th=[ 288], | 99.00th=[ 405], 99.50th=[ 443], 99.90th=[ 451], 99.95th=[ 451], | 99.99th=[ 451] bw ( KiB/s): min= 30, max= 160, per=26.04%, avg=89.59, stdev=37.65, samples=139 iops : min= 1, max= 10, avg= 4.82, stdev= 2.40, samples=139 lat (msec) : 10=1.56%, 20=13.15%, 50=23.31%, 100=22.01%, 250=35.55% lat (msec) : 500=4.43% cpu : usr=0.05%, sys=1.11%, ctx=1289, 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=145502: Sat Sep 5 16:35:20 2026 read: IOPS=4, BW=78.5KiB/s (80.4kB/s)(5744KiB/73153msec) clat (msec): min=7, max=518, avg=40.80, stdev=43.78 lat (msec): min=7, max=518, avg=40.80, stdev=43.78 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 15], 20.00th=[ 18], | 30.00th=[ 22], 40.00th=[ 25], 50.00th=[ 29], 60.00th=[ 34], | 70.00th=[ 40], 80.00th=[ 50], 90.00th=[ 82], 95.00th=[ 121], | 99.00th=[ 226], 99.50th=[ 309], 99.90th=[ 518], 99.95th=[ 518], | 99.99th=[ 518] bw ( KiB/s): min= 29, max= 319, per=28.28%, avg=92.46, stdev=56.83, samples=121 iops : min= 1, max= 19, avg= 5.00, stdev= 3.59, samples=121 write: IOPS=5, BW=89.5KiB/s (91.6kB/s)(6544KiB/73153msec); 0 zone resets clat (msec): min=39, max=531, avg=142.91, stdev=67.16 lat (msec): min=39, max=531, avg=142.91, stdev=67.16 clat percentiles (msec): | 1.00th=[ 50], 5.00th=[ 67], 10.00th=[ 80], 20.00th=[ 92], | 30.00th=[ 103], 40.00th=[ 113], 50.00th=[ 127], 60.00th=[ 142], | 70.00th=[ 161], 80.00th=[ 182], 90.00th=[ 234], 95.00th=[ 275], | 99.00th=[ 347], 99.50th=[ 372], 99.90th=[ 531], 99.95th=[ 531], | 99.99th=[ 531] bw ( KiB/s): min= 30, max= 224, per=26.16%, avg=89.98, stdev=38.28, samples=142 iops : min= 1, max= 14, avg= 4.85, stdev= 2.46, samples=142 lat (msec) : 10=1.69%, 20=10.55%, 50=26.17%, 100=19.79%, 250=37.37% lat (msec) : 500=4.17%, 750=0.26% cpu : usr=0.04%, sys=1.17%, ctx=1327, 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=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=145503: Sat Sep 5 16:35:20 2026 read: IOPS=5, BW=87.0KiB/s (89.1kB/s)(6256KiB/71899msec) clat (msec): min=5, max=332, avg=39.60, stdev=38.99 lat (msec): min=5, max=332, avg=39.60, stdev=38.99 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 13], 10.00th=[ 14], 20.00th=[ 18], | 30.00th=[ 21], 40.00th=[ 25], 50.00th=[ 29], 60.00th=[ 34], | 70.00th=[ 40], 80.00th=[ 51], 90.00th=[ 70], 95.00th=[ 109], | 99.00th=[ 222], 99.50th=[ 309], 99.90th=[ 334], 99.95th=[ 334], | 99.99th=[ 334] bw ( KiB/s): min= 30, max= 288, per=28.80%, avg=94.18, stdev=63.98, samples=131 iops : min= 1, max= 18, avg= 5.11, stdev= 4.06, samples=131 write: IOPS=5, BW=83.9KiB/s (85.9kB/s)(6032KiB/71899msec); 0 zone resets clat (msec): min=50, max=537, avg=149.27, stdev=74.28 lat (msec): min=50, max=537, avg=149.29, stdev=74.27 clat percentiles (msec): | 1.00th=[ 58], 5.00th=[ 72], 10.00th=[ 81], 20.00th=[ 94], | 30.00th=[ 106], 40.00th=[ 120], 50.00th=[ 132], 60.00th=[ 146], | 70.00th=[ 163], 80.00th=[ 190], 90.00th=[ 239], 95.00th=[ 300], | 99.00th=[ 451], 99.50th=[ 485], 99.90th=[ 542], 99.95th=[ 542], | 99.99th=[ 542] bw ( KiB/s): min= 30, max= 160, per=24.43%, avg=84.05, stdev=35.55, samples=141 iops : min= 1, max= 10, avg= 4.48, stdev= 2.29, samples=141 lat (msec) : 10=0.78%, 20=14.45%, 50=25.26%, 100=19.40%, 250=35.29% lat (msec) : 500=4.69%, 750=0.13% cpu : usr=0.04%, sys=1.21%, ctx=1418, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145504: Sat Sep 5 16:35:20 2026 read: IOPS=5, BW=83.4KiB/s (85.4kB/s)(6032KiB/72339msec) clat (msec): min=6, max=517, avg=41.75, stdev=43.07 lat (msec): min=6, max=517, avg=41.76, stdev=43.07 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 12], 10.00th=[ 15], 20.00th=[ 18], | 30.00th=[ 22], 40.00th=[ 25], 50.00th=[ 29], 60.00th=[ 35], | 70.00th=[ 45], 80.00th=[ 56], 90.00th=[ 87], 95.00th=[ 110], | 99.00th=[ 188], 99.50th=[ 334], 99.90th=[ 518], 99.95th=[ 518], | 99.99th=[ 518] bw ( KiB/s): min= 30, max= 319, per=28.28%, avg=92.47, stdev=62.84, samples=128 iops : min= 1, max= 19, avg= 4.98, stdev= 3.97, samples=128 write: IOPS=5, BW=86.5KiB/s (88.6kB/s)(6256KiB/72339msec); 0 zone resets clat (msec): min=49, max=492, avg=144.36, stdev=69.58 lat (msec): min=49, max=492, avg=144.36, stdev=69.58 clat percentiles (msec): | 1.00th=[ 54], 5.00th=[ 67], 10.00th=[ 82], 20.00th=[ 94], | 30.00th=[ 105], 40.00th=[ 114], 50.00th=[ 128], 60.00th=[ 140], | 70.00th=[ 157], 80.00th=[ 184], 90.00th=[ 234], 95.00th=[ 296], | 99.00th=[ 393], 99.50th=[ 422], 99.90th=[ 493], 99.95th=[ 493], | 99.99th=[ 493] bw ( KiB/s): min= 30, max= 191, per=25.60%, avg=88.05, stdev=38.20, samples=140 iops : min= 1, max= 11, avg= 4.73, stdev= 2.46, samples=140 lat (msec) : 10=1.43%, 20=11.59%, 50=24.74%, 100=20.96%, 250=36.85% lat (msec) : 500=4.30%, 750=0.13% cpu : usr=0.05%, sys=1.28%, ctx=1338, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=327KiB/s (335kB/s), 78.5KiB/s-87.0KiB/s (80.4kB/s-89.1kB/s), io=23.4MiB (24.5MB), run=71799-73153msec WRITE: bw=344KiB/s (353kB/s), 83.9KiB/s-89.5KiB/s (85.9kB/s-91.6kB/s), io=24.6MiB (25.8MB), run=71799-73153msec 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=145533: Sat Sep 5 16:35:38 2026 read: IOPS=1, BW=1358KiB/s (1390kB/s)(7168KiB/5280msec) clat (usec): min=604, max=2848.9k, avg=547915.09, stdev=1019605.69 lat (usec): min=606, max=2848.9k, avg=547916.52, stdev=1019606.23 clat percentiles (usec): | 1.00th=[ 603], 5.00th=[ 603], 10.00th=[ 603], | 20.00th=[ 84411], 30.00th=[ 149947], 40.00th=[ 149947], | 50.00th=[ 191890], 60.00th=[ 278922], 70.00th=[ 278922], | 80.00th=[ 283116], 90.00th=[2835350], 95.00th=[2835350], | 99.00th=[2835350], 99.50th=[2835350], 99.90th=[2835350], | 99.95th=[2835350], 99.99th=[2835350] bw ( KiB/s): min= 2043, max= 3737, per=100.00%, avg=2850.50, stdev=931.92, samples=4 iops : min= 1, max= 3, avg= 2.25, stdev= 0.96, samples=4 write: IOPS=0, BW=970KiB/s (993kB/s)(5120KiB/5280msec); 0 zone resets clat (msec): min=72, max=705, avg=263.04, stdev=252.16 lat (msec): min=72, max=705, avg=263.11, stdev=252.14 clat percentiles (msec): | 1.00th=[ 73], 5.00th=[ 73], 10.00th=[ 73], 20.00th=[ 73], | 30.00th=[ 159], 40.00th=[ 159], 50.00th=[ 171], 60.00th=[ 171], | 70.00th=[ 207], 80.00th=[ 207], 90.00th=[ 709], 95.00th=[ 709], | 99.00th=[ 709], 99.50th=[ 709], 99.90th=[ 709], 99.95th=[ 709], | 99.99th=[ 709] bw ( KiB/s): min= 1868, max= 3574, per=72.35%, avg=2496.67, stdev=937.33, samples=3 iops : min= 1, max= 3, avg= 2.00, stdev= 1.00, samples=3 lat (usec) : 750=8.33% lat (msec) : 100=16.67%, 250=41.67%, 500=16.67%, 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=13.75%, ctx=570, 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=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=145534: Sat Sep 5 16:35:38 2026 read: IOPS=0, BW=247KiB/s (252kB/s)(2048KiB/8308msec) clat (usec): min=488, max=573839, avg=287164.37, stdev=405420.36 lat (usec): min=489, max=573842, avg=287166.07, stdev=405421.46 clat percentiles (usec): | 1.00th=[ 490], 5.00th=[ 490], 10.00th=[ 490], 20.00th=[ 490], | 30.00th=[ 490], 40.00th=[ 490], 50.00th=[ 490], 60.00th=[574620], | 70.00th=[574620], 80.00th=[574620], 90.00th=[574620], 95.00th=[574620], | 99.00th=[574620], 99.50th=[574620], 99.90th=[574620], 99.95th=[574620], | 99.99th=[574620] bw ( KiB/s): min= 1374, max= 1988, per=68.19%, avg=1681.00, stdev=434.16, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1233KiB/s (1262kB/s)(10.0MiB/8308msec); 0 zone resets clat (msec): min=171, max=2678, avg=756.39, stdev=797.88 lat (msec): min=171, max=2678, avg=756.66, stdev=797.79 clat percentiles (msec): | 1.00th=[ 171], 5.00th=[ 171], 10.00th=[ 171], 20.00th=[ 249], | 30.00th=[ 300], 40.00th=[ 334], 50.00th=[ 401], 60.00th=[ 435], | 70.00th=[ 558], 80.00th=[ 793], 90.00th=[ 1636], 95.00th=[ 2668], | 99.00th=[ 2668], 99.50th=[ 2668], 99.90th=[ 2668], 99.95th=[ 2668], | 99.99th=[ 2668] bw ( KiB/s): min= 1969, max= 4055, per=89.50%, avg=3088.80, stdev=1024.53, samples=5 iops : min= 1, max= 3, avg= 2.20, stdev= 1.10, samples=5 lat (usec) : 500=8.33% lat (msec) : 250=16.67%, 500=33.33%, 750=16.67%, 1000=8.33%, 2000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.01%, sys=6.91%, ctx=179, 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=145535: Sat Sep 5 16:35:38 2026 read: IOPS=0, BW=759KiB/s (777kB/s)(6144KiB/8099msec) clat (msec): min=167, max=361, avg=253.87, stdev=68.70 lat (msec): min=167, max=361, avg=253.88, stdev=68.70 clat percentiles (msec): | 1.00th=[ 167], 5.00th=[ 167], 10.00th=[ 167], 20.00th=[ 194], | 30.00th=[ 194], 40.00th=[ 249], 50.00th=[ 249], 60.00th=[ 275], | 70.00th=[ 275], 80.00th=[ 275], 90.00th=[ 363], 95.00th=[ 363], | 99.00th=[ 363], 99.50th=[ 363], 99.90th=[ 363], 99.95th=[ 363], | 99.99th=[ 363] bw ( KiB/s): min= 1980, max= 4087, per=100.00%, avg=2539.50, stdev=1032.13, samples=4 iops : min= 1, max= 3, avg= 1.75, stdev= 0.96, samples=4 write: IOPS=0, BW=759KiB/s (777kB/s)(6144KiB/8099msec); 0 zone resets clat (msec): min=232, max=3619, avg=1086.50, stdev=1288.84 lat (msec): min=232, max=3619, avg=1086.63, stdev=1288.84 clat percentiles (msec): | 1.00th=[ 232], 5.00th=[ 232], 10.00th=[ 232], 20.00th=[ 292], | 30.00th=[ 292], 40.00th=[ 535], 50.00th=[ 535], 60.00th=[ 634], | 70.00th=[ 1217], 80.00th=[ 1217], 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= 2011, max= 2048, per=58.93%, avg=2033.60, stdev=15.87, samples=5 iops : min= 1, max= 2, avg= 1.20, stdev= 0.45, samples=5 lat (msec) : 250=33.33%, 500=33.33%, 750=16.67%, 2000=8.33%, >=2000=8.33% cpu : usr=0.01%, sys=6.84%, ctx=224, majf=0, minf=9 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=6,6,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145536: Sat Sep 5 16:35:38 2026 read: IOPS=0, BW=769KiB/s (787kB/s)(5120KiB/6661msec) clat (usec): min=1036, max=393769, avg=252573.74, stdev=158406.89 lat (usec): min=1038, max=393770, avg=252574.80, stdev=158406.78 clat percentiles (usec): | 1.00th=[ 1037], 5.00th=[ 1037], 10.00th=[ 1037], 20.00th=[ 1037], | 30.00th=[242222], 40.00th=[242222], 50.00th=[244319], 60.00th=[244319], | 70.00th=[383779], 80.00th=[383779], 90.00th=[392168], 95.00th=[392168], | 99.00th=[392168], 99.50th=[392168], 99.90th=[392168], 99.95th=[392168], | 99.99th=[392168] bw ( KiB/s): min= 3976, max= 4079, per=100.00%, avg=4027.50, stdev=72.83, samples=2 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1076KiB/s (1102kB/s)(7168KiB/6661msec); 0 zone resets clat (msec): min=238, max=3240, avg=761.97, stdev=1099.93 lat (msec): min=238, max=3240, avg=762.08, stdev=1099.95 clat percentiles (msec): | 1.00th=[ 239], 5.00th=[ 239], 10.00th=[ 239], 20.00th=[ 241], | 30.00th=[ 284], 40.00th=[ 284], 50.00th=[ 292], 60.00th=[ 477], | 70.00th=[ 477], 80.00th=[ 567], 90.00th=[ 3239], 95.00th=[ 3239], | 99.00th=[ 3239], 99.50th=[ 3239], 99.90th=[ 3239], 99.95th=[ 3239], | 99.99th=[ 3239] bw ( KiB/s): min= 1458, max= 2039, per=54.24%, avg=1871.67, stdev=239.06, samples=6 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=6 lat (msec) : 2=8.33%, 250=33.33%, 500=41.67%, 750=8.33%, >=2000=8.33% cpu : usr=0.02%, sys=8.95%, ctx=168, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=5,7,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=2465KiB/s (2524kB/s), 247KiB/s-1358KiB/s (252kB/s-1390kB/s), io=20.0MiB (20.0MB), run=5280-8308msec WRITE: bw=3451KiB/s (3534kB/s), 759KiB/s-1233KiB/s (777kB/s-1262kB/s), io=28.0MiB (29.4MB), run=5280-8308msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145529: Sat Sep 5 16:35:39 2026 read: IOPS=0, BW=774KiB/s (792kB/s)(7168KiB/9264msec) clat (msec): min=84, max=2705, avg=973.60, stdev=1094.92 lat (msec): min=84, max=2705, avg=973.60, stdev=1094.92 clat percentiles (msec): | 1.00th=[ 85], 5.00th=[ 85], 10.00th=[ 85], 20.00th=[ 104], | 30.00th=[ 131], 40.00th=[ 131], 50.00th=[ 205], 60.00th=[ 1770], | 70.00th=[ 1770], 80.00th=[ 1821], 90.00th=[ 2702], 95.00th=[ 2702], | 99.00th=[ 2702], 99.50th=[ 2702], 99.90th=[ 2702], 99.95th=[ 2702], | 99.99th=[ 2702] bw ( KiB/s): min= 2007, max= 4079, per=100.00%, avg=3045.00, stdev=1184.78, samples=4 iops : min= 1, max= 3, avg= 2.00, stdev= 1.15, samples=4 write: IOPS=0, BW=553KiB/s (566kB/s)(5120KiB/9264msec); 0 zone resets clat (msec): min=203, max=891, avg=410.59, stdev=289.61 lat (msec): min=203, max=891, avg=410.90, stdev=289.65 clat percentiles (msec): | 1.00th=[ 203], 5.00th=[ 203], 10.00th=[ 203], 20.00th=[ 203], | 30.00th=[ 218], 40.00th=[ 218], 50.00th=[ 271], 60.00th=[ 271], | 70.00th=[ 472], 80.00th=[ 472], 90.00th=[ 894], 95.00th=[ 894], | 99.00th=[ 894], 99.50th=[ 894], 99.90th=[ 894], 99.95th=[ 894], | 99.99th=[ 894] bw ( KiB/s): min= 2023, max= 4096, per=100.00%, avg=3394.00, stdev=1187.44, samples=3 iops : min= 1, max= 4, avg= 2.67, stdev= 1.53, samples=3 lat (msec) : 100=8.33%, 250=41.67%, 500=16.67%, 1000=8.33%, 2000=16.67% lat (msec) : >=2000=8.33% cpu : usr=0.01%, sys=2.05%, ctx=95, 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=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=145530: Sat Sep 5 16:35:39 2026 read: IOPS=0, BW=248KiB/s (253kB/s)(2048KiB/8273msec) clat (msec): min=146, max=493, avg=319.79, stdev=245.04 lat (msec): min=146, max=493, avg=319.79, stdev=245.04 clat percentiles (msec): | 1.00th=[ 146], 5.00th=[ 146], 10.00th=[ 146], 20.00th=[ 146], | 30.00th=[ 146], 40.00th=[ 146], 50.00th=[ 146], 60.00th=[ 493], | 70.00th=[ 493], 80.00th=[ 493], 90.00th=[ 493], 95.00th=[ 493], | 99.00th=[ 493], 99.50th=[ 493], 99.90th=[ 493], 99.95th=[ 493], | 99.99th=[ 493] bw ( KiB/s): min= 2023, max= 2048, per=92.10%, avg=2035.50, stdev=17.68, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 write: IOPS=1, BW=1238KiB/s (1267kB/s)(10.0MiB/8273msec); 0 zone resets clat (msec): min=232, max=2580, avg=738.40, stdev=752.13 lat (msec): min=232, max=2580, avg=738.87, stdev=752.37 clat percentiles (msec): | 1.00th=[ 232], 5.00th=[ 232], 10.00th=[ 232], 20.00th=[ 247], | 30.00th=[ 313], 40.00th=[ 338], 50.00th=[ 401], 60.00th=[ 439], | 70.00th=[ 542], 80.00th=[ 768], 90.00th=[ 1519], 95.00th=[ 2567], | 99.00th=[ 2567], 99.50th=[ 2567], 99.90th=[ 2567], 99.95th=[ 2567], | 99.99th=[ 2567] bw ( KiB/s): min= 2007, max= 4096, per=87.65%, avg=2712.00, stdev=1059.41, samples=6 iops : min= 1, max= 4, avg= 2.00, stdev= 1.26, samples=6 lat (msec) : 250=25.00%, 500=41.67%, 750=8.33%, 1000=8.33%, 2000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.01%, sys=2.61%, ctx=80, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=2,10,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145531: Sat Sep 5 16:35:39 2026 read: IOPS=0, BW=801KiB/s (820kB/s)(6144KiB/7671msec) clat (msec): min=92, max=572, avg=257.49, stdev=173.30 lat (msec): min=92, max=572, avg=257.49, stdev=173.30 clat percentiles (msec): | 1.00th=[ 92], 5.00th=[ 92], 10.00th=[ 92], 20.00th=[ 124], | 30.00th=[ 124], 40.00th=[ 197], 50.00th=[ 197], 60.00th=[ 264], | 70.00th=[ 296], 80.00th=[ 296], 90.00th=[ 575], 95.00th=[ 575], | 99.00th=[ 575], 99.50th=[ 575], 99.90th=[ 575], 99.95th=[ 575], | 99.99th=[ 575] bw ( KiB/s): min= 2007, max= 2048, per=91.87%, avg=2030.40, stdev=15.87, samples=5 iops : min= 1, max= 2, avg= 1.20, stdev= 0.45, samples=5 write: IOPS=0, BW=801KiB/s (820kB/s)(6144KiB/7671msec); 0 zone resets clat (msec): min=173, max=3455, avg=1014.28, stdev=1214.28 lat (msec): min=173, max=3455, avg=1014.38, stdev=1214.28 clat percentiles (msec): | 1.00th=[ 174], 5.00th=[ 174], 10.00th=[ 174], 20.00th=[ 443], | 30.00th=[ 443], 40.00th=[ 584], 50.00th=[ 584], 60.00th=[ 634], | 70.00th=[ 802], 80.00th=[ 802], 90.00th=[ 3440], 95.00th=[ 3440], | 99.00th=[ 3440], 99.50th=[ 3440], 99.90th=[ 3440], 99.95th=[ 3440], | 99.99th=[ 3440] bw ( KiB/s): min= 1363, max= 2048, per=61.60%, avg=1906.00, stdev=303.74, samples=5 iops : min= 1, max= 2, avg= 1.60, stdev= 0.55, samples=5 lat (msec) : 100=8.33%, 250=25.00%, 500=25.00%, 750=25.00%, 1000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=2.07%, ctx=65, 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=145532: Sat Sep 5 16:35:39 2026 read: IOPS=0, BW=683KiB/s (700kB/s)(5120KiB/7494msec) clat (msec): min=104, max=896, avg=332.21, stdev=343.46 lat (msec): min=104, max=896, avg=332.21, stdev=343.46 clat percentiles (msec): | 1.00th=[ 106], 5.00th=[ 106], 10.00th=[ 106], 20.00th=[ 106], | 30.00th=[ 111], 40.00th=[ 111], 50.00th=[ 124], 60.00th=[ 124], | 70.00th=[ 426], 80.00th=[ 426], 90.00th=[ 894], 95.00th=[ 894], | 99.00th=[ 894], 99.50th=[ 894], 99.90th=[ 894], 99.95th=[ 894], | 99.99th=[ 894] bw ( KiB/s): min= 2039, max= 4071, per=100.00%, avg=2719.33, stdev=1170.59, samples=3 iops : min= 1, max= 3, avg= 2.00, stdev= 1.00, samples=3 write: IOPS=0, BW=956KiB/s (979kB/s)(7168KiB/7494msec); 0 zone resets clat (msec): min=145, max=3116, avg=820.71, stdev=1036.38 lat (msec): min=146, max=3116, avg=820.84, stdev=1036.37 clat percentiles (msec): | 1.00th=[ 146], 5.00th=[ 146], 10.00th=[ 146], 20.00th=[ 167], | 30.00th=[ 485], 40.00th=[ 485], 50.00th=[ 485], 60.00th=[ 567], | 70.00th=[ 567], 80.00th=[ 776], 90.00th=[ 3104], 95.00th=[ 3104], | 99.00th=[ 3104], 99.50th=[ 3104], 99.90th=[ 3104], 99.95th=[ 3104], | 99.99th=[ 3104] bw ( KiB/s): min= 1479, max= 4015, per=75.04%, avg=2321.80, stdev=977.10, samples=5 iops : min= 1, max= 3, avg= 1.80, stdev= 0.84, samples=5 lat (msec) : 250=41.67%, 500=25.00%, 750=8.33%, 1000=16.67%, >=2000=8.33% cpu : usr=0.01%, sys=2.64%, ctx=73, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=5,7,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=2211KiB/s (2264kB/s), 248KiB/s-801KiB/s (253kB/s-820kB/s), io=20.0MiB (20.0MB), run=7494-9264msec WRITE: bw=3095KiB/s (3169kB/s), 553KiB/s-1238KiB/s (566kB/s-1267kB/s), io=28.0MiB (29.4MB), run=7494-9264msec 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=145543: Sat Sep 5 16:35:52 2026 read: IOPS=0, BW=3131KiB/s (3207kB/s)(12.0MiB/3924msec) clat (msec): min=270, max=1848, avg=1252.82, stdev=856.86 lat (msec): min=270, max=1848, avg=1252.82, stdev=856.86 clat percentiles (msec): | 1.00th=[ 271], 5.00th=[ 271], 10.00th=[ 271], 20.00th=[ 271], | 30.00th=[ 271], 40.00th=[ 1636], 50.00th=[ 1636], 60.00th=[ 1636], | 70.00th=[ 1854], 80.00th=[ 1854], 90.00th=[ 1854], 95.00th=[ 1854], | 99.00th=[ 1854], 99.50th=[ 1854], 99.90th=[ 1854], 99.95th=[ 1854], | 99.99th=[ 1854] bw ( KiB/s): min= 8175, max= 8175, per=100.00%, avg=8175.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 2000=66.67% cpu : usr=0.00%, sys=3.82%, ctx=42, 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=145544: Sat Sep 5 16:35:52 2026 read: IOPS=0, BW=1225KiB/s (1254kB/s)(4096KiB/3344msec) clat (nsec): min=290723k, max=290723k, avg=290722785.00, stdev= 0.00 lat (nsec): min=290725k, max=290725k, avg=290725066.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 292], 5.00th=[ 292], 10.00th=[ 292], 20.00th=[ 292], | 30.00th=[ 292], 40.00th=[ 292], 50.00th=[ 292], 60.00th=[ 292], | 70.00th=[ 292], 80.00th=[ 292], 90.00th=[ 292], 95.00th=[ 292], | 99.00th=[ 292], 99.50th=[ 292], 99.90th=[ 292], 99.95th=[ 292], | 99.99th=[ 292] bw ( KiB/s): min= 7288, max= 7288, per=100.00%, avg=7288.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2450KiB/s (2509kB/s)(8192KiB/3344msec); 0 zone resets clat (msec): min=782, max=2153, avg=1468.23, stdev=969.72 lat (msec): min=782, max=2154, avg=1468.50, stdev=969.62 clat percentiles (msec): | 1.00th=[ 785], 5.00th=[ 785], 10.00th=[ 785], 20.00th=[ 785], | 30.00th=[ 785], 40.00th=[ 785], 50.00th=[ 785], 60.00th=[ 2165], | 70.00th=[ 2165], 80.00th=[ 2165], 90.00th=[ 2165], 95.00th=[ 2165], | 99.00th=[ 2165], 99.50th=[ 2165], 99.90th=[ 2165], 99.95th=[ 2165], | 99.99th=[ 2165] bw ( KiB/s): min= 8175, max= 8175, per=83.43%, avg=8175.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 1000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=5.12%, ctx=59, 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=145545: Sat Sep 5 16:35:53 2026 write: IOPS=0, BW=3823KiB/s (3915kB/s)(12.0MiB/3214msec); 0 zone resets clat (msec): min=899, max=1103, avg=1009.87, stdev=102.92 lat (msec): min=901, max=1103, avg=1010.63, stdev=102.23 clat percentiles (msec): | 1.00th=[ 902], 5.00th=[ 902], 10.00th=[ 902], 20.00th=[ 902], | 30.00th=[ 902], 40.00th=[ 1028], 50.00th=[ 1028], 60.00th=[ 1028], | 70.00th=[ 1099], 80.00th=[ 1099], 90.00th=[ 1099], 95.00th=[ 1099], | 99.00th=[ 1099], 99.50th=[ 1099], 99.90th=[ 1099], 99.95th=[ 1099], | 99.99th=[ 1099] bw ( KiB/s): min= 8175, max= 8175, per=83.43%, avg=8175.00, stdev= 0.00, 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=3.42%, ctx=75, majf=0, minf=9 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145546: Sat Sep 5 16:35:53 2026 write: IOPS=0, BW=3821KiB/s (3913kB/s)(12.0MiB/3216msec); 0 zone resets clat (msec): min=565, max=1937, avg=1029.01, stdev=786.74 lat (msec): min=570, max=1937, avg=1031.29, stdev=785.05 clat percentiles (msec): | 1.00th=[ 567], 5.00th=[ 567], 10.00th=[ 567], 20.00th=[ 567], | 30.00th=[ 567], 40.00th=[ 584], 50.00th=[ 584], 60.00th=[ 584], | 70.00th=[ 1938], 80.00th=[ 1938], 90.00th=[ 1938], 95.00th=[ 1938], | 99.00th=[ 1938], 99.50th=[ 1938], 99.90th=[ 1938], 99.95th=[ 1938], | 99.99th=[ 1938] bw ( KiB/s): min= 8110, max= 8175, per=83.10%, avg=8142.50, stdev=45.96, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=66.67%, 2000=33.33% cpu : usr=0.00%, sys=3.08%, ctx=51, 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=4175KiB/s (4276kB/s), 1225KiB/s-3131KiB/s (1254kB/s-3207kB/s), io=16.0MiB (16.8MB), run=3344-3924msec WRITE: bw=9799KiB/s (10.0MB/s), 2450KiB/s-3823KiB/s (2509kB/s-3915kB/s), io=32.0MiB (33.6MB), run=3214-3344msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145548: Sat Sep 5 16:35:54 2026 read: IOPS=0, BW=4001KiB/s (4097kB/s)(12.0MiB/3071msec) clat (msec): min=566, max=1300, avg=1016.46, stdev=393.95 lat (msec): min=566, max=1300, avg=1016.46, stdev=393.95 clat percentiles (msec): | 1.00th=[ 567], 5.00th=[ 567], 10.00th=[ 567], 20.00th=[ 567], | 30.00th=[ 567], 40.00th=[ 1183], 50.00th=[ 1183], 60.00th=[ 1183], | 70.00th=[ 1301], 80.00th=[ 1301], 90.00th=[ 1301], 95.00th=[ 1301], | 99.00th=[ 1301], 99.50th=[ 1301], 99.90th=[ 1301], 99.95th=[ 1301], | 99.99th=[ 1301] bw ( KiB/s): min= 7816, max= 8159, per=100.00%, avg=7987.50, stdev=242.54, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=33.33%, 2000=66.67% cpu : usr=0.00%, sys=11.30%, ctx=333, 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=145549: Sat Sep 5 16:35:54 2026 read: IOPS=0, BW=1058KiB/s (1084kB/s)(4096KiB/3871msec) clat (nsec): min=1185.3M, max=1185.3M, avg=1185346445.00, stdev= 0.00 lat (nsec): min=1185.3M, max=1185.3M, avg=1185348795.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1183], 5.00th=[ 1183], 10.00th=[ 1183], 20.00th=[ 1183], | 30.00th=[ 1183], 40.00th=[ 1183], 50.00th=[ 1183], 60.00th=[ 1183], | 70.00th=[ 1183], 80.00th=[ 1183], 90.00th=[ 1183], 95.00th=[ 1183], | 99.00th=[ 1183], 99.50th=[ 1183], 99.90th=[ 1183], 99.95th=[ 1183], | 99.99th=[ 1183] bw ( KiB/s): min= 7816, max= 7816, per=100.00%, avg=7816.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2116KiB/s (2167kB/s)(8192KiB/3871msec); 0 zone resets clat (msec): min=889, max=1775, avg=1332.52, stdev=627.01 lat (msec): min=889, max=1776, avg=1333.10, stdev=626.96 clat percentiles (msec): | 1.00th=[ 885], 5.00th=[ 885], 10.00th=[ 885], 20.00th=[ 885], | 30.00th=[ 885], 40.00th=[ 885], 50.00th=[ 885], 60.00th=[ 1770], | 70.00th=[ 1770], 80.00th=[ 1770], 90.00th=[ 1770], 95.00th=[ 1770], | 99.00th=[ 1770], 99.50th=[ 1770], 99.90th=[ 1770], 99.95th=[ 1770], | 99.99th=[ 1770] bw ( KiB/s): min= 8143, max= 8143, per=100.00%, avg=8143.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 1000=33.33%, 2000=66.67% cpu : usr=0.00%, sys=2.97%, ctx=110, 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=145550: Sat Sep 5 16:35:54 2026 write: IOPS=0, BW=2888KiB/s (2957kB/s)(12.0MiB/4255msec); 0 zone resets clat (msec): min=314, max=1990, avg=1416.89, stdev=955.36 lat (msec): min=315, max=1991, avg=1417.77, stdev=954.96 clat percentiles (msec): | 1.00th=[ 313], 5.00th=[ 313], 10.00th=[ 313], 20.00th=[ 313], | 30.00th=[ 313], 40.00th=[ 1938], 50.00th=[ 1938], 60.00th=[ 1938], | 70.00th=[ 1989], 80.00th=[ 1989], 90.00th=[ 1989], 95.00th=[ 1989], | 99.00th=[ 1989], 99.50th=[ 1989], 99.90th=[ 1989], 99.95th=[ 1989], | 99.99th=[ 1989] bw ( KiB/s): min= 8143, max= 8192, per=100.00%, avg=8167.50, stdev=34.65, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 500=33.33%, 2000=66.67% cpu : usr=0.00%, sys=3.15%, ctx=47, majf=0, minf=7 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=145551: Sat Sep 5 16:35:54 2026 write: IOPS=0, BW=3074KiB/s (3148kB/s)(12.0MiB/3997msec); 0 zone resets clat (msec): min=403, max=2056, avg=1331.22, stdev=844.83 lat (msec): min=404, max=2056, avg=1331.86, stdev=844.42 clat percentiles (msec): | 1.00th=[ 405], 5.00th=[ 405], 10.00th=[ 405], 20.00th=[ 405], | 30.00th=[ 405], 40.00th=[ 1536], 50.00th=[ 1536], 60.00th=[ 1536], | 70.00th=[ 2056], 80.00th=[ 2056], 90.00th=[ 2056], 95.00th=[ 2056], | 99.00th=[ 2056], 99.50th=[ 2056], 99.90th=[ 2056], 99.95th=[ 2056], | 99.99th=[ 2056] bw ( KiB/s): min= 7846, max= 7846, per=100.00%, avg=7846.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.03%, sys=3.03%, ctx=38, 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=4232KiB/s (4334kB/s), 1058KiB/s-4001KiB/s (1084kB/s-4097kB/s), io=16.0MiB (16.8MB), run=3071-3871msec WRITE: bw=7701KiB/s (7886kB/s), 2116KiB/s-3074KiB/s (2167kB/s-3148kB/s), io=32.0MiB (33.6MB), run=3871-4255msec