== sanity test 398b: DIO and buffer IO race ============== 21:43:23 (1767321803) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 5.88858 s, 8.5 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=186159: Thu Jan 1 21:45:12 2026 read: IOPS=16, BW=66.7KiB/s (68.3kB/s)(5992KiB/89786msec) clat (usec): min=109, max=210821, avg=32788.97, stdev=19786.78 lat (usec): min=109, max=210822, avg=32796.11, stdev=19787.18 clat percentiles (usec): | 1.00th=[ 143], 5.00th=[ 8455], 10.00th=[ 12911], 20.00th=[ 17433], | 30.00th=[ 21103], 40.00th=[ 25035], 50.00th=[ 30278], 60.00th=[ 34341], | 70.00th=[ 39584], 80.00th=[ 46400], 90.00th=[ 56886], 95.00th=[ 65799], | 99.00th=[ 98042], 99.50th=[117965], 99.90th=[166724], 99.95th=[210764], | 99.99th=[210764] bw ( KiB/s): min= 15, max= 118, per=25.57%, avg=66.49, stdev=20.13, samples=176 iops : min= 3, max= 29, avg=16.04, stdev= 5.08, samples=176 write: IOPS=17, BW=70.1KiB/s (71.8kB/s)(6296KiB/89786msec); 0 zone resets clat (usec): min=682, max=595311, avg=25561.43, stdev=29581.99 lat (usec): min=683, max=595313, avg=25563.38, stdev=29581.46 clat percentiles (usec): | 1.00th=[ 971], 5.00th=[ 1123], 10.00th=[ 1303], 20.00th=[ 2376], | 30.00th=[ 4817], 40.00th=[ 10552], 50.00th=[ 17957], 60.00th=[ 24249], | 70.00th=[ 32900], 80.00th=[ 45351], 90.00th=[ 62129], 95.00th=[ 77071], | 99.00th=[108528], 99.50th=[128451], 99.90th=[158335], 99.95th=[591397], | 99.99th=[591397] bw ( KiB/s): min= 8, max= 160, per=25.58%, avg=69.85, stdev=25.86, samples=176 iops : min= 2, max= 40, avg=16.88, stdev= 6.47, samples=176 lat (usec) : 250=1.24%, 500=0.23%, 750=0.16%, 1000=0.72% lat (msec) : 2=8.40%, 4=5.31%, 10=7.06%, 20=17.22%, 50=43.52% lat (msec) : 100=15.01%, 250=1.11%, 750=0.03% cpu : usr=0.10%, sys=6.54%, ctx=6409, 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=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=186160: Thu Jan 1 21:45:12 2026 read: IOPS=16, BW=65.4KiB/s (66.9kB/s)(5940KiB/90891msec) clat (usec): min=94, max=258036, avg=33539.04, stdev=21235.90 lat (usec): min=95, max=258037, avg=33540.00, stdev=21235.92 clat percentiles (usec): | 1.00th=[ 153], 5.00th=[ 9372], 10.00th=[ 13566], 20.00th=[ 17433], | 30.00th=[ 21365], 40.00th=[ 25035], 50.00th=[ 29230], 60.00th=[ 34341], | 70.00th=[ 39584], 80.00th=[ 46924], 90.00th=[ 59507], 95.00th=[ 71828], | 99.00th=[104334], 99.50th=[117965], 99.90th=[198181], 99.95th=[258999], | 99.99th=[258999] bw ( KiB/s): min= 7, max= 119, per=25.09%, avg=65.24, stdev=20.93, samples=179 iops : min= 1, max= 29, avg=15.73, stdev= 5.24, samples=179 write: IOPS=17, BW=69.8KiB/s (71.5kB/s)(6348KiB/90891msec); 0 zone resets clat (usec): min=769, max=628621, avg=25641.11, stdev=29665.50 lat (usec): min=771, max=628622, avg=25642.56, stdev=29665.59 clat percentiles (usec): | 1.00th=[ 971], 5.00th=[ 1123], 10.00th=[ 1254], 20.00th=[ 2376], | 30.00th=[ 5145], 40.00th=[ 11994], 50.00th=[ 17957], 60.00th=[ 25035], | 70.00th=[ 33162], 80.00th=[ 45351], 90.00th=[ 61604], 95.00th=[ 73925], | 99.00th=[103285], 99.50th=[115868], 99.90th=[229639], 99.95th=[624952], | 99.99th=[624952] bw ( KiB/s): min= 7, max= 159, per=25.44%, avg=69.44, stdev=24.29, samples=180 iops : min= 1, max= 39, avg=16.79, stdev= 6.12, samples=180 lat (usec) : 100=0.03%, 250=0.78%, 500=0.39%, 750=0.10%, 1000=0.75% lat (msec) : 2=8.69%, 4=4.56%, 10=6.77%, 20=18.07%, 50=42.74% lat (msec) : 100=15.92%, 250=1.14%, 500=0.03%, 750=0.03% cpu : usr=0.09%, sys=6.65%, ctx=6556, majf=0, minf=17 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1485,1587,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=186162: Thu Jan 1 21:45:12 2026 read: IOPS=16, BW=65.6KiB/s (67.1kB/s)(6028KiB/91951msec) clat (usec): min=101, max=255161, avg=33729.52, stdev=21932.92 lat (usec): min=102, max=255162, avg=33734.19, stdev=21928.98 clat percentiles (usec): | 1.00th=[ 145], 5.00th=[ 7635], 10.00th=[ 13435], 20.00th=[ 17695], | 30.00th=[ 21365], 40.00th=[ 25297], 50.00th=[ 29230], 60.00th=[ 34866], | 70.00th=[ 40633], 80.00th=[ 46924], 90.00th=[ 58983], 95.00th=[ 73925], | 99.00th=[102237], 99.50th=[116917], 99.90th=[191890], 99.95th=[254804], | 99.99th=[254804] bw ( KiB/s): min= 23, max= 128, per=25.36%, avg=65.94, stdev=19.85, samples=180 iops : min= 5, max= 32, avg=15.89, stdev= 4.98, samples=180 write: IOPS=17, BW=68.1KiB/s (69.7kB/s)(6260KiB/91951msec); 0 zone resets clat (usec): min=691, max=681906, avg=26021.85, stdev=30344.35 lat (usec): min=691, max=681907, avg=26024.89, stdev=30345.98 clat percentiles (usec): | 1.00th=[ 1004], 5.00th=[ 1139], 10.00th=[ 1369], 20.00th=[ 2573], | 30.00th=[ 5407], 40.00th=[ 13173], 50.00th=[ 19530], 60.00th=[ 25822], | 70.00th=[ 33162], 80.00th=[ 44303], 90.00th=[ 62653], 95.00th=[ 74974], | 99.00th=[111674], 99.50th=[128451], 99.90th=[173016], 99.95th=[683672], | 99.99th=[683672] bw ( KiB/s): min= 15, max= 150, per=24.90%, avg=67.97, stdev=25.91, samples=181 iops : min= 3, max= 37, avg=16.43, stdev= 6.50, samples=181 lat (usec) : 250=1.73%, 500=0.10%, 750=0.20%, 1000=0.49% lat (msec) : 2=7.94%, 4=4.85%, 10=6.12%, 20=17.55%, 50=44.50% lat (msec) : 100=15.23%, 250=1.24%, 500=0.03%, 750=0.03% cpu : usr=0.10%, sys=6.68%, ctx=6631, 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=186163: Thu Jan 1 21:45:12 2026 read: IOPS=16, BW=65.8KiB/s (67.3kB/s)(6052KiB/92043msec) clat (usec): min=91, max=230059, avg=34163.30, stdev=21614.71 lat (usec): min=92, max=230060, avg=34166.90, stdev=21617.02 clat percentiles (usec): | 1.00th=[ 139], 5.00th=[ 8848], 10.00th=[ 12911], 20.00th=[ 17433], | 30.00th=[ 21627], 40.00th=[ 25560], 50.00th=[ 30278], 60.00th=[ 35390], | 70.00th=[ 41157], 80.00th=[ 49021], 90.00th=[ 60031], 95.00th=[ 70779], | 99.00th=[108528], 99.50th=[126354], 99.90th=[145753], 99.95th=[229639], | 99.99th=[229639] bw ( KiB/s): min= 15, max= 134, per=25.35%, avg=65.90, stdev=20.35, samples=180 iops : min= 3, max= 33, avg=15.89, stdev= 5.10, samples=180 write: IOPS=16, BW=67.8KiB/s (69.4kB/s)(6236KiB/92043msec); 0 zone resets clat (usec): min=709, max=689398, avg=25634.81, stdev=30724.23 lat (usec): min=710, max=689399, avg=25636.06, stdev=30724.18 clat percentiles (usec): | 1.00th=[ 996], 5.00th=[ 1139], 10.00th=[ 1319], 20.00th=[ 2474], | 30.00th=[ 5276], 40.00th=[ 11469], 50.00th=[ 18220], 60.00th=[ 25035], | 70.00th=[ 32375], 80.00th=[ 43779], 90.00th=[ 61604], 95.00th=[ 76022], | 99.00th=[113771], 99.50th=[125305], 99.90th=[160433], 99.95th=[692061], | 99.99th=[692061] bw ( KiB/s): min= 8, max= 132, per=24.71%, avg=67.47, stdev=25.33, samples=181 iops : min= 2, max= 33, avg=16.29, stdev= 6.36, samples=181 lat (usec) : 100=0.03%, 250=1.63%, 500=0.29%, 750=0.16%, 1000=0.55% lat (msec) : 2=8.04%, 4=4.52%, 10=6.84%, 20=17.97%, 50=42.55% lat (msec) : 100=15.72%, 250=1.66%, 750=0.03% cpu : usr=0.10%, sys=6.54%, ctx=6559, 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=261KiB/s (267kB/s), 65.4KiB/s-66.7KiB/s (66.9kB/s-68.3kB/s), io=23.4MiB (24.6MB), run=89786-92043msec WRITE: bw=273KiB/s (280kB/s), 67.8KiB/s-70.1KiB/s (69.4kB/s-71.8kB/s), io=24.6MiB (25.7MB), run=89786-92043msec rand-rw: (groupid=0, jobs=1): err= 0: pid=186161: Thu Jan 1 21:45:49 2026 read: IOPS=11, BW=46.2KiB/s (47.3kB/s)(5992KiB/129628msec) clat (msec): min=4, max=757, avg=34.07, stdev=33.63 lat (msec): min=4, max=757, avg=34.08, stdev=33.63 clat percentiles (msec): | 1.00th=[ 6], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 21], 50.00th=[ 24], 60.00th=[ 31], | 70.00th=[ 39], 80.00th=[ 48], 90.00th=[ 71], 95.00th=[ 90], | 99.00th=[ 144], 99.50th=[ 169], 99.90th=[ 218], 99.95th=[ 760], | 99.99th=[ 760] bw ( KiB/s): min= 7, max= 215, per=24.89%, avg=46.04, stdev=29.77, samples=253 iops : min= 1, max= 53, avg=10.88, stdev= 7.46, samples=253 write: IOPS=12, BW=48.6KiB/s (49.7kB/s)(6296KiB/129628msec); 0 zone resets clat (msec): min=7, max=337, avg=49.70, stdev=31.51 lat (msec): min=7, max=337, avg=49.70, stdev=31.51 clat percentiles (msec): | 1.00th=[ 11], 5.00th=[ 17], 10.00th=[ 21], 20.00th=[ 25], | 30.00th=[ 30], 40.00th=[ 35], 50.00th=[ 41], 60.00th=[ 50], | 70.00th=[ 59], 80.00th=[ 72], 90.00th=[ 90], 95.00th=[ 109], | 99.00th=[ 159], 99.50th=[ 182], 99.90th=[ 222], 99.95th=[ 338], | 99.99th=[ 338] bw ( KiB/s): min= 7, max= 159, per=24.99%, avg=48.24, stdev=25.44, samples=254 iops : min= 1, max= 39, avg=11.44, stdev= 6.39, samples=254 lat (msec) : 10=5.08%, 20=19.50%, 50=46.09%, 100=24.15%, 250=5.11% lat (msec) : 500=0.03%, 1000=0.03% cpu : usr=0.06%, sys=2.22%, ctx=4819, 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=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=186164: Thu Jan 1 21:45:49 2026 read: IOPS=11, BW=46.2KiB/s (47.3kB/s)(5940KiB/128508msec) clat (msec): min=4, max=644, avg=33.78, stdev=32.12 lat (msec): min=4, max=644, avg=33.79, stdev=32.12 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 20], 50.00th=[ 24], 60.00th=[ 30], | 70.00th=[ 37], 80.00th=[ 48], 90.00th=[ 71], 95.00th=[ 91], | 99.00th=[ 140], 99.50th=[ 165], 99.90th=[ 241], 99.95th=[ 642], | 99.99th=[ 642] bw ( KiB/s): min= 7, max= 215, per=25.13%, avg=46.50, stdev=28.71, samples=250 iops : min= 1, max= 53, avg=11.00, stdev= 7.22, samples=250 write: IOPS=12, BW=49.4KiB/s (50.6kB/s)(6348KiB/128508msec); 0 zone resets clat (msec): min=6, max=340, avg=49.12, stdev=31.83 lat (msec): min=6, max=340, avg=49.12, stdev=31.83 clat percentiles (msec): | 1.00th=[ 12], 5.00th=[ 16], 10.00th=[ 20], 20.00th=[ 25], | 30.00th=[ 30], 40.00th=[ 35], 50.00th=[ 41], 60.00th=[ 48], | 70.00th=[ 57], 80.00th=[ 69], 90.00th=[ 90], 95.00th=[ 111], | 99.00th=[ 159], 99.50th=[ 180], 99.90th=[ 262], 99.95th=[ 342], | 99.99th=[ 342] bw ( KiB/s): min= 7, max= 159, per=25.40%, avg=49.02, stdev=25.54, samples=253 iops : min= 1, max= 39, avg=11.64, stdev= 6.41, samples=253 lat (msec) : 10=4.49%, 20=20.74%, 50=47.04%, 100=22.10%, 250=5.53% lat (msec) : 500=0.07%, 750=0.03% cpu : usr=0.07%, sys=2.24%, ctx=4735, 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=186165: Thu Jan 1 21:45:49 2026 read: IOPS=11, BW=46.7KiB/s (47.9kB/s)(6028KiB/128980msec) clat (msec): min=4, max=239, avg=34.62, stdev=27.57 lat (msec): min=4, max=239, avg=34.62, stdev=27.57 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 19], 40.00th=[ 22], 50.00th=[ 26], 60.00th=[ 31], | 70.00th=[ 39], 80.00th=[ 52], 90.00th=[ 72], 95.00th=[ 89], | 99.00th=[ 133], 99.50th=[ 157], 99.90th=[ 213], 99.95th=[ 241], | 99.99th=[ 241] bw ( KiB/s): min= 7, max= 183, per=25.46%, avg=47.10, stdev=25.80, samples=250 iops : min= 1, max= 45, avg=11.15, stdev= 6.47, samples=250 write: IOPS=12, BW=48.5KiB/s (49.7kB/s)(6260KiB/128980msec); 0 zone resets clat (msec): min=7, max=665, avg=48.85, stdev=33.98 lat (msec): min=7, max=665, avg=48.85, stdev=33.98 clat percentiles (msec): | 1.00th=[ 11], 5.00th=[ 16], 10.00th=[ 20], 20.00th=[ 25], | 30.00th=[ 29], 40.00th=[ 35], 50.00th=[ 41], 60.00th=[ 48], | 70.00th=[ 57], 80.00th=[ 70], 90.00th=[ 89], 95.00th=[ 107], | 99.00th=[ 155], 99.50th=[ 180], 99.90th=[ 211], 99.95th=[ 667], | 99.99th=[ 667] bw ( KiB/s): min= 7, max= 183, per=24.91%, avg=48.07, stdev=27.51, samples=254 iops : min= 1, max= 45, avg=11.40, stdev= 6.91, samples=254 lat (msec) : 10=3.74%, 20=19.69%, 50=47.30%, 100=24.12%, 250=5.11% lat (msec) : 750=0.03% cpu : usr=0.07%, sys=2.33%, ctx=4936, 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=186166: Thu Jan 1 21:45:49 2026 read: IOPS=11, BW=47.2KiB/s (48.3kB/s)(6052KiB/128340msec) clat (msec): min=4, max=327, avg=34.06, stdev=28.20 lat (msec): min=4, max=327, avg=34.07, stdev=28.20 clat percentiles (msec): | 1.00th=[ 6], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 15], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 25], 60.00th=[ 30], | 70.00th=[ 38], 80.00th=[ 52], 90.00th=[ 72], 95.00th=[ 92], | 99.00th=[ 134], 99.50th=[ 159], 99.90th=[ 192], 99.95th=[ 330], | 99.99th=[ 330] bw ( KiB/s): min= 7, max= 189, per=25.65%, avg=47.46, stdev=28.49, samples=250 iops : min= 1, max= 47, avg=11.24, stdev= 7.17, samples=250 write: IOPS=12, BW=48.6KiB/s (49.8kB/s)(6236KiB/128340msec); 0 zone resets clat (msec): min=8, max=662, avg=49.04, stdev=34.04 lat (msec): min=8, max=662, avg=49.04, stdev=34.04 clat percentiles (msec): | 1.00th=[ 12], 5.00th=[ 17], 10.00th=[ 20], 20.00th=[ 25], | 30.00th=[ 30], 40.00th=[ 35], 50.00th=[ 41], 60.00th=[ 48], | 70.00th=[ 58], 80.00th=[ 68], 90.00th=[ 89], 95.00th=[ 107], | 99.00th=[ 165], 99.50th=[ 186], 99.90th=[ 266], 99.95th=[ 659], | 99.99th=[ 659] bw ( KiB/s): min= 7, max= 175, per=25.10%, avg=48.45, stdev=25.12, samples=252 iops : min= 1, max= 43, avg=11.50, stdev= 6.30, samples=252 lat (msec) : 10=4.52%, 20=19.34%, 50=47.27%, 100=23.70%, 250=5.08% lat (msec) : 500=0.07%, 750=0.03% cpu : usr=0.06%, sys=2.34%, ctx=4843, 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=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=185KiB/s (190kB/s), 46.2KiB/s-47.2KiB/s (47.3kB/s-48.3kB/s), io=23.4MiB (24.6MB), run=128340-129628msec WRITE: bw=194KiB/s (199kB/s), 48.5KiB/s-49.4KiB/s (49.7kB/s-50.6kB/s), io=24.6MiB (25.7MB), run=128340-129628msec 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=186202: Thu Jan 1 21:46:25 2026 read: IOPS=14, BW=240KiB/s (245kB/s)(5920KiB/24698msec) clat (usec): min=98, max=126301, avg=35895.05, stdev=24184.95 lat (usec): min=99, max=126302, avg=35896.06, stdev=24184.95 clat percentiles (usec): | 1.00th=[ 117], 5.00th=[ 153], 10.00th=[ 227], 20.00th=[ 17695], | 30.00th=[ 22676], 40.00th=[ 27919], 50.00th=[ 33817], 60.00th=[ 38536], | 70.00th=[ 45876], 80.00th=[ 53740], 90.00th=[ 65274], 95.00th=[ 74974], | 99.00th=[115868], 99.50th=[122160], 99.90th=[126354], 99.95th=[126354], | 99.99th=[126354] bw ( KiB/s): min= 96, max= 447, per=25.68%, avg=236.27, stdev=70.12, samples=48 iops : min= 6, max= 27, avg=14.02, stdev= 4.38, samples=48 write: IOPS=16, BW=258KiB/s (264kB/s)(6368KiB/24698msec); 0 zone resets clat (usec): min=1463, max=201877, avg=27972.45, stdev=27996.14 lat (usec): min=1465, max=201879, avg=27974.37, stdev=27996.17 clat percentiles (usec): | 1.00th=[ 1532], 5.00th=[ 1762], 10.00th=[ 2343], 20.00th=[ 4359], | 30.00th=[ 7701], 40.00th=[ 11863], 50.00th=[ 19530], 60.00th=[ 26870], | 70.00th=[ 35914], 80.00th=[ 49546], 90.00th=[ 67634], 95.00th=[ 82314], | 99.00th=[113771], 99.50th=[145753], 99.90th=[202376], 99.95th=[202376], | 99.99th=[202376] bw ( KiB/s): min= 31, max= 475, per=26.60%, avg=257.52, stdev=98.60, samples=48 iops : min= 1, max= 29, avg=15.35, stdev= 6.17, samples=48 lat (usec) : 100=0.13%, 250=4.95%, 500=0.65% lat (msec) : 2=4.17%, 4=5.86%, 10=10.03%, 20=12.24%, 50=39.58% lat (msec) : 100=20.18%, 250=2.21% cpu : usr=0.09%, sys=7.07%, ctx=1640, 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=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=186203: Thu Jan 1 21:46:25 2026 read: IOPS=13, BW=224KiB/s (229kB/s)(5744KiB/25645msec) clat (usec): min=85, max=388661, avg=36892.14, stdev=30640.91 lat (usec): min=86, max=388661, avg=36893.19, stdev=30640.88 clat percentiles (usec): | 1.00th=[ 122], 5.00th=[ 176], 10.00th=[ 1385], 20.00th=[ 19268], | 30.00th=[ 23462], 40.00th=[ 27657], 50.00th=[ 32375], 60.00th=[ 37487], | 70.00th=[ 42730], 80.00th=[ 51119], 90.00th=[ 65274], 95.00th=[ 85459], | 99.00th=[131597], 99.50th=[143655], 99.90th=[387974], 99.95th=[387974], | 99.99th=[387974] bw ( KiB/s): min= 61, max= 447, per=24.25%, avg=223.06, stdev=85.61, samples=50 iops : min= 3, max= 27, avg=13.20, stdev= 5.34, samples=50 write: IOPS=15, BW=255KiB/s (261kB/s)(6544KiB/25645msec); 0 zone resets clat (usec): min=1054, max=258556, avg=29922.74, stdev=30661.24 lat (usec): min=1055, max=258558, avg=29936.20, stdev=30685.76 clat percentiles (usec): | 1.00th=[ 1369], 5.00th=[ 1745], 10.00th=[ 2409], 20.00th=[ 4621], | 30.00th=[ 9503], 40.00th=[ 15401], 50.00th=[ 21103], 60.00th=[ 26870], | 70.00th=[ 36439], 80.00th=[ 50594], 90.00th=[ 71828], 95.00th=[ 88605], | 99.00th=[126354], 99.50th=[129500], 99.90th=[258999], 99.95th=[258999], | 99.99th=[258999] bw ( KiB/s): min= 63, max= 542, per=26.52%, avg=256.69, stdev=85.72, samples=49 iops : min= 3, max= 33, avg=15.33, stdev= 5.34, samples=49 lat (usec) : 100=0.13%, 250=3.12%, 500=0.39%, 1000=0.13% lat (msec) : 2=5.21%, 4=5.08%, 10=7.68%, 20=14.06%, 50=43.23% lat (msec) : 100=18.23%, 250=2.47%, 500=0.26% cpu : usr=0.03%, sys=6.82%, ctx=1662, 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=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=186204: Thu Jan 1 21:46:25 2026 read: IOPS=15, BW=242KiB/s (248kB/s)(6256KiB/25875msec) clat (usec): min=109, max=176932, avg=37257.80, stdev=27167.72 lat (usec): min=110, max=176934, avg=37259.02, stdev=27167.67 clat percentiles (usec): | 1.00th=[ 143], 5.00th=[ 172], 10.00th=[ 922], 20.00th=[ 18482], | 30.00th=[ 23725], 40.00th=[ 28443], 50.00th=[ 32900], 60.00th=[ 36963], | 70.00th=[ 42730], 80.00th=[ 53740], 90.00th=[ 70779], 95.00th=[ 91751], | 99.00th=[131597], 99.50th=[175113], 99.90th=[177210], 99.95th=[177210], | 99.99th=[177210] bw ( KiB/s): min= 95, max= 448, per=26.27%, avg=241.67, stdev=79.37, samples=51 iops : min= 5, max= 28, avg=14.37, stdev= 5.04, samples=51 write: IOPS=14, BW=233KiB/s (239kB/s)(6032KiB/25875msec); 0 zone resets clat (usec): min=1470, max=122707, avg=29846.05, stdev=26302.04 lat (usec): min=1472, max=122709, avg=29856.74, stdev=26293.45 clat percentiles (usec): | 1.00th=[ 1565], 5.00th=[ 1827], 10.00th=[ 2933], 20.00th=[ 6063], | 30.00th=[ 10945], 40.00th=[ 16909], 50.00th=[ 22938], 60.00th=[ 29230], | 70.00th=[ 39584], 80.00th=[ 50594], 90.00th=[ 67634], 95.00th=[ 84411], | 99.00th=[110625], 99.50th=[122160], 99.90th=[123208], 99.95th=[123208], | 99.99th=[123208] bw ( KiB/s): min= 63, max= 477, per=23.61%, avg=228.55, stdev=95.78, samples=51 iops : min= 3, max= 29, avg=13.57, stdev= 6.02, samples=51 lat (usec) : 250=4.30%, 500=0.39%, 750=0.26%, 1000=0.39% lat (msec) : 2=3.12%, 4=4.30%, 10=7.42%, 20=13.02%, 50=45.31% lat (msec) : 100=18.62%, 250=2.86% cpu : usr=0.09%, sys=6.86%, ctx=1775, 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=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=186205: Thu Jan 1 21:46:25 2026 read: IOPS=14, BW=232KiB/s (237kB/s)(6032KiB/26024msec) clat (usec): min=109, max=177953, avg=38490.88, stdev=28070.39 lat (usec): min=110, max=177954, avg=38491.89, stdev=28070.43 clat percentiles (usec): | 1.00th=[ 124], 5.00th=[ 167], 10.00th=[ 586], 20.00th=[ 17957], | 30.00th=[ 23200], 40.00th=[ 27657], 50.00th=[ 32375], 60.00th=[ 40633], | 70.00th=[ 46924], 80.00th=[ 57410], 90.00th=[ 76022], 95.00th=[ 89654], | 99.00th=[133694], 99.50th=[162530], 99.90th=[177210], 99.95th=[177210], | 99.99th=[177210] bw ( KiB/s): min= 95, max= 384, per=25.42%, avg=233.90, stdev=72.21, samples=50 iops : min= 5, max= 24, avg=13.90, stdev= 4.59, samples=50 write: IOPS=15, BW=240KiB/s (246kB/s)(6256KiB/26024msec); 0 zone resets clat (usec): min=1136, max=162074, avg=28778.89, stdev=27908.68 lat (usec): min=1137, max=162076, avg=28780.65, stdev=27908.75 clat percentiles (usec): | 1.00th=[ 1467], 5.00th=[ 1778], 10.00th=[ 2409], 20.00th=[ 5014], | 30.00th=[ 8586], 40.00th=[ 13435], 50.00th=[ 20841], 60.00th=[ 27395], | 70.00th=[ 38011], 80.00th=[ 46924], 90.00th=[ 68682], 95.00th=[ 84411], | 99.00th=[130548], 99.50th=[152044], 99.90th=[162530], 99.95th=[162530], | 99.99th=[162530] bw ( KiB/s): min= 63, max= 606, per=24.53%, avg=237.47, stdev=96.81, samples=51 iops : min= 3, max= 37, avg=14.12, stdev= 6.05, samples=51 lat (usec) : 250=4.04%, 500=0.78%, 750=0.39%, 1000=0.13% lat (msec) : 2=4.17%, 4=4.69%, 10=8.46%, 20=13.93%, 50=41.02% lat (msec) : 100=19.66%, 250=2.73% cpu : usr=0.07%, sys=6.61%, ctx=1692, 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=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=920KiB/s (942kB/s), 224KiB/s-242KiB/s (229kB/s-248kB/s), io=23.4MiB (24.5MB), run=24698-26024msec WRITE: bw=968KiB/s (992kB/s), 233KiB/s-258KiB/s (239kB/s-264kB/s), io=24.6MiB (25.8MB), run=24698-26024msec rand-rw: (groupid=0, jobs=1): err= 0: pid=186206: Thu Jan 1 21:46:36 2026 read: IOPS=9, BW=160KiB/s (164kB/s)(5920KiB/37032msec) clat (msec): min=6, max=222, avg=38.55, stdev=31.02 lat (msec): min=6, max=222, avg=38.55, stdev=31.02 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 14], 20.00th=[ 17], | 30.00th=[ 20], 40.00th=[ 23], 50.00th=[ 27], 60.00th=[ 33], | 70.00th=[ 41], 80.00th=[ 59], 90.00th=[ 86], 95.00th=[ 107], | 99.00th=[ 150], 99.50th=[ 161], 99.90th=[ 224], 99.95th=[ 224], | 99.99th=[ 224] bw ( KiB/s): min= 31, max= 475, per=25.08%, avg=161.25, stdev=92.90, samples=72 iops : min= 1, max= 29, avg= 9.28, stdev= 5.83, samples=72 write: IOPS=10, BW=172KiB/s (176kB/s)(6368KiB/37032msec); 0 zone resets clat (msec): min=10, max=478, avg=56.39, stdev=41.34 lat (msec): min=10, max=478, avg=56.40, stdev=41.34 clat percentiles (msec): | 1.00th=[ 13], 5.00th=[ 20], 10.00th=[ 23], 20.00th=[ 28], | 30.00th=[ 34], 40.00th=[ 39], 50.00th=[ 46], 60.00th=[ 55], | 70.00th=[ 64], 80.00th=[ 75], 90.00th=[ 103], 95.00th=[ 132], | 99.00th=[ 188], 99.50th=[ 234], 99.90th=[ 481], 99.95th=[ 481], | 99.99th=[ 481] bw ( KiB/s): min= 27, max= 414, per=25.30%, avg=171.29, stdev=86.61, samples=73 iops : min= 1, max= 25, avg= 9.90, stdev= 5.44, samples=73 lat (msec) : 10=1.95%, 20=16.80%, 50=46.22%, 100=26.69%, 250=8.20% lat (msec) : 500=0.13% cpu : usr=0.06%, sys=2.26%, ctx=1245, 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=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=186207: Thu Jan 1 21:46:36 2026 read: IOPS=9, BW=154KiB/s (158kB/s)(5744KiB/37198msec) clat (msec): min=5, max=234, avg=38.88, stdev=32.21 lat (msec): min=5, max=234, avg=38.88, stdev=32.21 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 17], | 30.00th=[ 20], 40.00th=[ 24], 50.00th=[ 28], 60.00th=[ 35], | 70.00th=[ 42], 80.00th=[ 54], 90.00th=[ 89], 95.00th=[ 110], | 99.00th=[ 148], 99.50th=[ 163], 99.90th=[ 234], 99.95th=[ 234], | 99.99th=[ 234] bw ( KiB/s): min= 27, max= 541, per=24.08%, avg=154.81, stdev=94.88, samples=72 iops : min= 1, max= 33, avg= 8.86, stdev= 5.98, samples=72 write: IOPS=10, BW=176KiB/s (180kB/s)(6544KiB/37198msec); 0 zone resets clat (msec): min=8, max=189, avg=56.14, stdev=33.95 lat (msec): min=8, max=189, avg=56.15, stdev=33.95 clat percentiles (msec): | 1.00th=[ 13], 5.00th=[ 19], 10.00th=[ 23], 20.00th=[ 30], | 30.00th=[ 35], 40.00th=[ 40], 50.00th=[ 48], 60.00th=[ 55], | 70.00th=[ 66], 80.00th=[ 83], 90.00th=[ 102], 95.00th=[ 123], | 99.00th=[ 180], 99.50th=[ 184], 99.90th=[ 190], 99.95th=[ 190], | 99.99th=[ 190] bw ( KiB/s): min= 31, max= 446, per=25.53%, avg=172.86, stdev=88.17, samples=73 iops : min= 1, max= 27, avg=10.00, stdev= 5.55, samples=73 lat (msec) : 10=3.91%, 20=13.54%, 50=47.92%, 100=25.52%, 250=9.11% cpu : usr=0.03%, sys=2.07%, ctx=1205, 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=186208: Thu Jan 1 21:46:36 2026 read: IOPS=10, BW=169KiB/s (173kB/s)(6256KiB/37055msec) clat (msec): min=5, max=174, avg=38.15, stdev=27.70 lat (msec): min=5, max=174, avg=38.15, stdev=27.70 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 14], 20.00th=[ 17], | 30.00th=[ 21], 40.00th=[ 26], 50.00th=[ 30], 60.00th=[ 34], | 70.00th=[ 44], 80.00th=[ 54], 90.00th=[ 80], 95.00th=[ 102], | 99.00th=[ 136], 99.50th=[ 153], 99.90th=[ 176], 99.95th=[ 176], | 99.99th=[ 176] bw ( KiB/s): min= 31, max= 447, per=26.31%, avg=169.16, stdev=96.85, samples=73 iops : min= 1, max= 27, avg= 9.77, stdev= 6.08, samples=73 write: IOPS=10, BW=163KiB/s (167kB/s)(6032KiB/37055msec); 0 zone resets clat (msec): min=6, max=481, avg=58.41, stdev=41.49 lat (msec): min=6, max=481, avg=58.42, stdev=41.49 clat percentiles (msec): | 1.00th=[ 11], 5.00th=[ 19], 10.00th=[ 22], 20.00th=[ 30], | 30.00th=[ 36], 40.00th=[ 42], 50.00th=[ 50], 60.00th=[ 57], | 70.00th=[ 66], 80.00th=[ 82], 90.00th=[ 110], 95.00th=[ 128], | 99.00th=[ 190], 99.50th=[ 226], 99.90th=[ 481], 99.95th=[ 481], | 99.99th=[ 481] bw ( KiB/s): min= 31, max= 541, per=23.74%, avg=160.75, stdev=83.24, samples=73 iops : min= 1, max= 33, avg= 9.25, stdev= 5.22, samples=73 lat (msec) : 10=2.34%, 20=16.15%, 50=45.44%, 100=27.47%, 250=8.46% lat (msec) : 500=0.13% cpu : usr=0.01%, sys=2.15%, ctx=1198, 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=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=186209: Thu Jan 1 21:46:36 2026 read: IOPS=10, BW=163KiB/s (167kB/s)(6032KiB/36974msec) clat (msec): min=4, max=321, avg=38.99, stdev=35.26 lat (msec): min=4, max=321, avg=38.99, stdev=35.26 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 10], 10.00th=[ 14], 20.00th=[ 17], | 30.00th=[ 20], 40.00th=[ 24], 50.00th=[ 28], 60.00th=[ 33], | 70.00th=[ 40], 80.00th=[ 54], 90.00th=[ 81], 95.00th=[ 111], | 99.00th=[ 184], 99.50th=[ 194], 99.90th=[ 321], 99.95th=[ 321], | 99.99th=[ 321] bw ( KiB/s): min= 31, max= 573, per=25.87%, avg=166.37, stdev=95.37, samples=71 iops : min= 1, max= 35, avg= 9.59, stdev= 6.00, samples=71 write: IOPS=10, BW=169KiB/s (173kB/s)(6256KiB/36974msec); 0 zone resets clat (msec): min=11, max=250, avg=55.85, stdev=35.37 lat (msec): min=11, max=250, avg=55.86, stdev=35.37 clat percentiles (msec): | 1.00th=[ 14], 5.00th=[ 19], 10.00th=[ 23], 20.00th=[ 29], | 30.00th=[ 35], 40.00th=[ 40], 50.00th=[ 46], 60.00th=[ 54], | 70.00th=[ 64], 80.00th=[ 78], 90.00th=[ 102], 95.00th=[ 132], | 99.00th=[ 176], 99.50th=[ 213], 99.90th=[ 251], 99.95th=[ 251], | 99.99th=[ 251] bw ( KiB/s): min= 27, max= 446, per=25.33%, avg=171.49, stdev=84.95, samples=72 iops : min= 1, max= 27, avg= 9.92, stdev= 5.33, samples=72 lat (msec) : 10=2.47%, 20=16.15%, 50=47.79%, 100=24.61%, 250=8.72% lat (msec) : 500=0.26% cpu : usr=0.06%, sys=2.41%, ctx=1247, 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=644KiB/s (659kB/s), 154KiB/s-169KiB/s (158kB/s-173kB/s), io=23.4MiB (24.5MB), run=36974-37198msec WRITE: bw=677KiB/s (694kB/s), 163KiB/s-176KiB/s (167kB/s-180kB/s), io=24.6MiB (25.8MB), run=36974-37198msec 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=186220: Thu Jan 1 21:46:52 2026 read: IOPS=2, BW=2164KiB/s (2216kB/s)(7168KiB/3312msec) clat (usec): min=765, max=320920, avg=180568.09, stdev=112598.01 lat (usec): min=766, max=320921, avg=180569.51, stdev=112597.92 clat percentiles (usec): | 1.00th=[ 766], 5.00th=[ 766], 10.00th=[ 766], 20.00th=[ 86508], | 30.00th=[156238], 40.00th=[156238], 50.00th=[173016], 60.00th=[244319], | 70.00th=[244319], 80.00th=[283116], 90.00th=[320865], 95.00th=[320865], | 99.00th=[320865], 99.50th=[320865], 99.90th=[320865], 99.95th=[320865], | 99.99th=[320865] bw ( KiB/s): min= 2035, max= 4619, per=57.91%, avg=3580.33, stdev=1364.48, samples=3 iops : min= 1, max= 4, avg= 2.67, stdev= 1.53, samples=3 write: IOPS=1, BW=1546KiB/s (1583kB/s)(5120KiB/3312msec); 0 zone resets clat (msec): min=162, max=685, avg=383.81, stdev=194.24 lat (msec): min=162, max=685, avg=383.88, stdev=194.21 clat percentiles (msec): | 1.00th=[ 163], 5.00th=[ 163], 10.00th=[ 163], 20.00th=[ 163], | 30.00th=[ 288], 40.00th=[ 288], 50.00th=[ 372], 60.00th=[ 372], | 70.00th=[ 414], 80.00th=[ 414], 90.00th=[ 684], 95.00th=[ 684], | 99.00th=[ 684], 99.50th=[ 684], 99.90th=[ 684], 99.95th=[ 684], | 99.99th=[ 684] bw ( KiB/s): min= 2015, max= 4071, per=29.32%, avg=2538.00, stdev=1022.07, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 lat (usec) : 1000=8.33% lat (msec) : 100=8.33%, 250=33.33%, 500=41.67%, 750=8.33% cpu : usr=0.00%, sys=16.73%, ctx=566, 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=186221: Thu Jan 1 21:46:52 2026 read: IOPS=0, BW=639KiB/s (654kB/s)(2048KiB/3207msec) clat (usec): min=1270, max=193865, avg=97568.13, stdev=136185.66 lat (usec): min=1271, max=193868, avg=97569.79, stdev=136186.89 clat percentiles (usec): | 1.00th=[ 1270], 5.00th=[ 1270], 10.00th=[ 1270], 20.00th=[ 1270], | 30.00th=[ 1270], 40.00th=[ 1270], 50.00th=[ 1270], 60.00th=[193987], | 70.00th=[193987], 80.00th=[193987], 90.00th=[193987], 95.00th=[193987], | 99.00th=[193987], 99.50th=[193987], 99.90th=[193987], 99.95th=[193987], | 99.99th=[193987] bw ( KiB/s): min= 1551, max= 1946, per=28.28%, avg=1748.50, stdev=279.31, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=3, BW=3193KiB/s (3270kB/s)(10.0MiB/3207msec); 0 zone resets clat (msec): min=50, max=542, avg=296.60, stdev=163.98 lat (msec): min=50, max=542, avg=296.73, stdev=163.98 clat percentiles (msec): | 1.00th=[ 51], 5.00th=[ 51], 10.00th=[ 51], 20.00th=[ 78], | 30.00th=[ 199], 40.00th=[ 284], 50.00th=[ 288], 60.00th=[ 309], | 70.00th=[ 309], 80.00th=[ 380], 90.00th=[ 531], 95.00th=[ 542], | 99.00th=[ 542], 99.50th=[ 542], 99.90th=[ 542], 99.95th=[ 542], | 99.99th=[ 542] bw ( KiB/s): min= 1551, max= 4087, per=36.08%, avg=3123.40, stdev=1236.91, samples=5 iops : min= 1, max= 3, avg= 2.20, stdev= 1.10, samples=5 lat (msec) : 2=8.33%, 100=16.67%, 250=16.67%, 500=41.67%, 750=16.67% cpu : usr=0.00%, sys=19.21%, ctx=191, 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=186222: Thu Jan 1 21:46:52 2026 read: IOPS=2, BW=2241KiB/s (2294kB/s)(6144KiB/2742msec) clat (usec): min=725, max=320530, avg=148827.33, stdev=105563.98 lat (usec): min=726, max=320531, avg=148828.36, stdev=105564.01 clat percentiles (usec): | 1.00th=[ 725], 5.00th=[ 725], 10.00th=[ 725], 20.00th=[107480], | 30.00th=[107480], 40.00th=[115868], 50.00th=[115868], 60.00th=[164627], | 70.00th=[183501], 80.00th=[183501], 90.00th=[320865], 95.00th=[320865], | 99.00th=[320865], 99.50th=[320865], 99.90th=[320865], 99.95th=[320865], | 99.99th=[320865] bw ( KiB/s): min= 2015, max= 4087, per=53.88%, avg=3331.67, stdev=1144.39, samples=3 iops : min= 1, max= 3, avg= 2.33, stdev= 1.15, samples=3 write: IOPS=2, BW=2241KiB/s (2294kB/s)(6144KiB/2742msec); 0 zone resets clat (msec): min=58, max=440, avg=297.92, stdev=157.27 lat (msec): min=58, max=440, avg=298.00, stdev=157.27 clat percentiles (msec): | 1.00th=[ 59], 5.00th=[ 59], 10.00th=[ 59], 20.00th=[ 146], | 30.00th=[ 146], 40.00th=[ 347], 50.00th=[ 347], 60.00th=[ 388], | 70.00th=[ 409], 80.00th=[ 409], 90.00th=[ 439], 95.00th=[ 439], | 99.00th=[ 439], 99.50th=[ 439], 99.90th=[ 439], 99.95th=[ 439], | 99.99th=[ 439] bw ( KiB/s): min= 1946, max= 3340, per=26.29%, avg=2275.80, stdev=596.13, samples=5 iops : min= 1, max= 3, avg= 1.40, stdev= 0.89, samples=5 lat (usec) : 750=8.33% lat (msec) : 100=8.33%, 250=41.67%, 500=41.67% cpu : usr=0.00%, sys=18.75%, ctx=221, 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=186223: Thu Jan 1 21:46:52 2026 read: IOPS=1, BW=1611KiB/s (1650kB/s)(5120KiB/3178msec) clat (usec): min=721, max=457813, avg=154236.84, stdev=193665.89 lat (usec): min=722, max=457815, avg=154237.88, stdev=193666.10 clat percentiles (usec): | 1.00th=[ 725], 5.00th=[ 725], 10.00th=[ 725], 20.00th=[ 725], | 30.00th=[ 1237], 40.00th=[ 1237], 50.00th=[ 82314], 60.00th=[ 82314], | 70.00th=[229639], 80.00th=[229639], 90.00th=[459277], 95.00th=[459277], | 99.00th=[459277], 99.50th=[459277], 99.90th=[459277], 99.95th=[459277], | 99.99th=[459277] bw ( KiB/s): min= 2015, max= 3893, per=42.82%, avg=2647.67, stdev=1078.54, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 write: IOPS=2, BW=2256KiB/s (2310kB/s)(7168KiB/3178msec); 0 zone resets clat (msec): min=129, max=466, avg=323.28, stdev=124.95 lat (msec): min=129, max=466, avg=324.45, stdev=125.16 clat percentiles (msec): | 1.00th=[ 130], 5.00th=[ 130], 10.00th=[ 130], 20.00th=[ 192], | 30.00th=[ 300], 40.00th=[ 300], 50.00th=[ 342], 60.00th=[ 409], | 70.00th=[ 409], 80.00th=[ 422], 90.00th=[ 468], 95.00th=[ 468], | 99.00th=[ 468], 99.50th=[ 468], 99.90th=[ 468], 99.95th=[ 468], | 99.99th=[ 468] bw ( KiB/s): min= 1946, max= 3210, per=27.72%, avg=2399.67, stdev=703.44, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 lat (usec) : 750=8.33% lat (msec) : 2=8.33%, 100=8.33%, 250=25.00%, 500=50.00% cpu : usr=0.00%, sys=15.23%, ctx=92, 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=6184KiB/s (6332kB/s), 639KiB/s-2241KiB/s (654kB/s-2294kB/s), io=20.0MiB (20.0MB), run=2742-3312msec WRITE: bw=8657KiB/s (8865kB/s), 1546KiB/s-3193KiB/s (1583kB/s-3270kB/s), io=28.0MiB (29.4MB), run=2742-3312msec rand-rw: (groupid=0, jobs=1): err= 0: pid=186226: Thu Jan 1 21:46:54 2026 read: IOPS=1, BW=2010KiB/s (2058kB/s)(7168KiB/3567msec) clat (msec): min=108, max=511, avg=298.22, stdev=172.59 lat (msec): min=108, max=511, avg=298.22, stdev=172.59 clat percentiles (msec): | 1.00th=[ 109], 5.00th=[ 109], 10.00th=[ 109], 20.00th=[ 174], | 30.00th=[ 184], 40.00th=[ 184], 50.00th=[ 186], 60.00th=[ 460], | 70.00th=[ 460], 80.00th=[ 468], 90.00th=[ 510], 95.00th=[ 510], | 99.00th=[ 510], 99.50th=[ 510], 99.90th=[ 510], 99.95th=[ 510], | 99.99th=[ 510] bw ( KiB/s): min= 1570, max= 2039, per=36.58%, avg=1916.60, stdev=198.75, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 write: IOPS=1, BW=1435KiB/s (1470kB/s)(5120KiB/3567msec); 0 zone resets clat (msec): min=92, max=928, avg=282.56, stdev=361.55 lat (msec): min=92, max=928, avg=282.67, stdev=361.54 clat percentiles (msec): | 1.00th=[ 93], 5.00th=[ 93], 10.00th=[ 93], 20.00th=[ 93], | 30.00th=[ 113], 40.00th=[ 113], 50.00th=[ 127], 60.00th=[ 127], | 70.00th=[ 153], 80.00th=[ 153], 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= 1992, max= 6095, per=55.12%, avg=4043.50, stdev=2901.26, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 lat (msec) : 100=8.33%, 250=58.33%, 500=16.67%, 750=8.33%, 1000=8.33% cpu : usr=0.00%, sys=4.12%, ctx=51, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=7,5,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=186227: Thu Jan 1 21:46:54 2026 read: IOPS=0, BW=534KiB/s (547kB/s)(2048KiB/3832msec) clat (msec): min=113, max=441, avg=277.46, stdev=232.32 lat (msec): min=113, max=441, avg=277.46, stdev=232.32 clat percentiles (msec): | 1.00th=[ 113], 5.00th=[ 113], 10.00th=[ 113], 20.00th=[ 113], | 30.00th=[ 113], 40.00th=[ 113], 50.00th=[ 113], 60.00th=[ 443], | 70.00th=[ 443], 80.00th=[ 443], 90.00th=[ 443], 95.00th=[ 443], | 99.00th=[ 443], 99.50th=[ 443], 99.90th=[ 443], 99.95th=[ 443], | 99.99th=[ 443] bw ( KiB/s): min= 1535, max= 2031, per=34.03%, avg=1783.00, stdev=350.72, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=2, BW=2672KiB/s (2736kB/s)(10.0MiB/3832msec); 0 zone resets clat (msec): min=99, max=1090, avg=305.07, stdev=318.03 lat (msec): min=99, max=1090, avg=305.31, stdev=318.05 clat percentiles (msec): | 1.00th=[ 100], 5.00th=[ 100], 10.00th=[ 100], 20.00th=[ 133], | 30.00th=[ 138], 40.00th=[ 140], 50.00th=[ 153], 60.00th=[ 157], | 70.00th=[ 174], 80.00th=[ 347], 90.00th=[ 625], 95.00th=[ 1083], | 99.00th=[ 1083], 99.50th=[ 1083], 99.90th=[ 1083], 99.95th=[ 1083], | 99.99th=[ 1083] bw ( KiB/s): min= 1992, max= 7922, per=61.50%, avg=4512.00, stdev=2977.70, samples=4 iops : min= 1, max= 7, avg= 3.50, stdev= 3.00, samples=4 lat (msec) : 100=8.33%, 250=58.33%, 500=16.67%, 750=8.33%, 2000=8.33% cpu : usr=0.08%, sys=6.63%, 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=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=186228: Thu Jan 1 21:46:54 2026 read: IOPS=1, BW=1771KiB/s (1814kB/s)(6144KiB/3469msec) clat (msec): min=70, max=571, avg=266.81, stdev=196.06 lat (msec): min=70, max=571, avg=266.81, stdev=196.06 clat percentiles (msec): | 1.00th=[ 70], 5.00th=[ 70], 10.00th=[ 70], 20.00th=[ 89], | 30.00th=[ 89], 40.00th=[ 171], 50.00th=[ 171], 60.00th=[ 292], | 70.00th=[ 405], 80.00th=[ 405], 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= 1928, max= 4063, per=47.70%, avg=2499.50, stdev=1042.98, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 write: IOPS=1, BW=1771KiB/s (1814kB/s)(6144KiB/3469msec); 0 zone resets clat (msec): min=84, max=453, avg=270.68, stdev=157.60 lat (msec): min=84, max=453, avg=270.76, stdev=157.60 clat percentiles (msec): | 1.00th=[ 85], 5.00th=[ 85], 10.00th=[ 85], 20.00th=[ 134], | 30.00th=[ 134], 40.00th=[ 205], 50.00th=[ 205], 60.00th=[ 300], | 70.00th=[ 451], 80.00th=[ 451], 90.00th=[ 456], 95.00th=[ 456], | 99.00th=[ 456], 99.50th=[ 456], 99.90th=[ 456], 99.95th=[ 456], | 99.99th=[ 456] bw ( KiB/s): min= 1928, max= 4079, per=34.18%, avg=2507.50, stdev=1048.53, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 lat (msec) : 100=25.00%, 250=25.00%, 500=41.67%, 750=8.33% cpu : usr=0.00%, sys=5.85%, ctx=84, 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=186229: Thu Jan 1 21:46:54 2026 read: IOPS=1, BW=1310KiB/s (1342kB/s)(5120KiB/3908msec) clat (msec): min=72, max=236, avg=137.72, stdev=67.91 lat (msec): min=72, max=236, avg=137.72, stdev=67.91 clat percentiles (msec): | 1.00th=[ 72], 5.00th=[ 72], 10.00th=[ 72], 20.00th=[ 72], | 30.00th=[ 82], 40.00th=[ 82], 50.00th=[ 129], 60.00th=[ 129], | 70.00th=[ 171], 80.00th=[ 171], 90.00th=[ 236], 95.00th=[ 236], | 99.00th=[ 236], 99.50th=[ 236], 99.90th=[ 236], 99.95th=[ 236], | 99.99th=[ 236] bw ( KiB/s): min= 1980, max= 6095, per=77.05%, avg=4037.50, stdev=2909.74, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 write: IOPS=1, BW=1834KiB/s (1878kB/s)(7168KiB/3908msec); 0 zone resets clat (msec): min=128, max=1030, avg=360.07, stdev=322.54 lat (msec): min=129, max=1030, avg=360.26, stdev=322.45 clat percentiles (msec): | 1.00th=[ 129], 5.00th=[ 129], 10.00th=[ 129], 20.00th=[ 131], | 30.00th=[ 184], 40.00th=[ 184], 50.00th=[ 211], 60.00th=[ 355], | 70.00th=[ 355], 80.00th=[ 485], 90.00th=[ 1028], 95.00th=[ 1028], | 99.00th=[ 1028], 99.50th=[ 1028], 99.90th=[ 1028], 99.95th=[ 1028], | 99.99th=[ 1028] bw ( KiB/s): min= 3856, max= 4031, per=53.83%, avg=3949.33, stdev=88.08, samples=3 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=3 lat (msec) : 100=16.67%, 250=58.33%, 500=16.67%, 2000=8.33% cpu : usr=0.03%, sys=7.50%, ctx=121, 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=5241KiB/s (5366kB/s), 534KiB/s-2010KiB/s (547kB/s-2058kB/s), io=20.0MiB (20.0MB), run=3469-3908msec WRITE: bw=7337KiB/s (7513kB/s), 1435KiB/s-2672KiB/s (1470kB/s-2736kB/s), io=28.0MiB (29.4MB), run=3469-3908msec 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=186239: Thu Jan 1 21:47:06 2026 read: IOPS=1, BW=4901KiB/s (5019kB/s)(12.0MiB/2507msec) clat (msec): min=662, max=995, avg=792.96, stdev=178.18 lat (msec): min=662, max=995, avg=792.96, stdev=178.18 clat percentiles (msec): | 1.00th=[ 659], 5.00th=[ 659], 10.00th=[ 659], 20.00th=[ 659], | 30.00th=[ 659], 40.00th=[ 718], 50.00th=[ 718], 60.00th=[ 718], | 70.00th=[ 995], 80.00th=[ 995], 90.00th=[ 995], 95.00th=[ 995], | 99.00th=[ 995], 99.50th=[ 995], 99.90th=[ 995], 99.95th=[ 995], | 99.99th=[ 995] bw ( KiB/s): min= 7656, max= 8000, per=100.00%, avg=7828.00, stdev=243.24, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=66.67%, 1000=33.33% cpu : usr=0.00%, sys=11.09%, ctx=288, majf=0, minf=8 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=3,0,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=186240: Thu Jan 1 21:47:06 2026 read: IOPS=0, BW=1276KiB/s (1306kB/s)(4096KiB/3211msec) clat (nsec): min=821910k, max=821910k, avg=821909938.00, stdev= 0.00 lat (nsec): min=821913k, max=821913k, avg=821912643.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 818], 5.00th=[ 818], 10.00th=[ 818], 20.00th=[ 818], | 30.00th=[ 818], 40.00th=[ 818], 50.00th=[ 818], 60.00th=[ 818], | 70.00th=[ 818], 80.00th=[ 818], 90.00th=[ 818], 95.00th=[ 818], | 99.00th=[ 818], 99.50th=[ 818], 99.90th=[ 818], 99.95th=[ 818], | 99.99th=[ 818] bw ( KiB/s): min= 8000, max= 8000, per=100.00%, avg=8000.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2551KiB/s (2612kB/s)(8192KiB/3211msec); 0 zone resets clat (msec): min=1032, max=1216, avg=1124.39, stdev=129.95 lat (msec): min=1034, max=1216, avg=1125.61, stdev=128.81 clat percentiles (msec): | 1.00th=[ 1036], 5.00th=[ 1036], 10.00th=[ 1036], 20.00th=[ 1036], | 30.00th=[ 1036], 40.00th=[ 1036], 50.00th=[ 1036], 60.00th=[ 1217], | 70.00th=[ 1217], 80.00th=[ 1217], 90.00th=[ 1217], 95.00th=[ 1217], | 99.00th=[ 1217], 99.50th=[ 1217], 99.90th=[ 1217], 99.95th=[ 1217], | 99.99th=[ 1217] bw ( KiB/s): min= 7656, max= 7656, per=75.03%, avg=7656.00, 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=0.06%, sys=5.14%, ctx=158, majf=0, minf=10 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1,2,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=186241: Thu Jan 1 21:47:06 2026 write: IOPS=1, BW=4309KiB/s (4412kB/s)(12.0MiB/2852msec); 0 zone resets clat (msec): min=217, max=1485, avg=937.08, stdev=651.01 lat (msec): min=218, max=1485, avg=937.48, stdev=650.99 clat percentiles (msec): | 1.00th=[ 218], 5.00th=[ 218], 10.00th=[ 218], 20.00th=[ 218], | 30.00th=[ 218], 40.00th=[ 1116], 50.00th=[ 1116], 60.00th=[ 1116], | 70.00th=[ 1485], 80.00th=[ 1485], 90.00th=[ 1485], 95.00th=[ 1485], | 99.00th=[ 1485], 99.50th=[ 1485], 99.90th=[ 1485], 99.95th=[ 1485], | 99.99th=[ 1485] bw ( KiB/s): min= 7984, max= 8094, per=78.78%, avg=8039.00, stdev=77.78, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 250=33.33%, 2000=66.67% cpu : usr=0.00%, sys=4.24%, ctx=56, majf=0, minf=8 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=186242: Thu Jan 1 21:47:06 2026 write: IOPS=1, BW=4526KiB/s (4635kB/s)(12.0MiB/2715msec); 0 zone resets clat (msec): min=376, max=1222, avg=888.50, stdev=450.25 lat (msec): min=376, max=1223, avg=888.91, stdev=450.26 clat percentiles (msec): | 1.00th=[ 376], 5.00th=[ 376], 10.00th=[ 376], 20.00th=[ 376], | 30.00th=[ 376], 40.00th=[ 1070], 50.00th=[ 1070], 60.00th=[ 1070], | 70.00th=[ 1217], 80.00th=[ 1217], 90.00th=[ 1217], 95.00th=[ 1217], | 99.00th=[ 1217], 99.50th=[ 1217], 99.90th=[ 1217], 99.95th=[ 1217], | 99.99th=[ 1217] bw ( KiB/s): min= 8094, max= 8094, per=79.32%, avg=8094.00, 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=4.83%, ctx=51, majf=0, minf=9 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=5102KiB/s (5225kB/s), 1276KiB/s-4901KiB/s (1306kB/s-5019kB/s), io=16.0MiB (16.8MB), run=2507-3211msec WRITE: bw=9.96MiB/s (10.4MB/s), 2551KiB/s-4526KiB/s (2612kB/s-4635kB/s), io=32.0MiB (33.6MB), run=2715-3211msec rand-rw: (groupid=0, jobs=1): err= 0: pid=186234: Thu Jan 1 21:47:07 2026 read: IOPS=1, BW=4513KiB/s (4621kB/s)(12.0MiB/2723msec) clat (msec): min=658, max=1058, avg=876.59, stdev=202.28 lat (msec): min=658, max=1058, avg=876.60, stdev=202.28 clat percentiles (msec): | 1.00th=[ 659], 5.00th=[ 659], 10.00th=[ 659], 20.00th=[ 659], | 30.00th=[ 659], 40.00th=[ 911], 50.00th=[ 911], 60.00th=[ 911], | 70.00th=[ 1062], 80.00th=[ 1062], 90.00th=[ 1062], 95.00th=[ 1062], | 99.00th=[ 1062], 99.50th=[ 1062], 99.90th=[ 1062], 99.95th=[ 1062], | 99.99th=[ 1062] bw ( KiB/s): min= 7953, max= 8143, per=100.00%, avg=8048.00, stdev=134.35, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=3.89%, ctx=48, majf=0, minf=8 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=3,0,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=186235: Thu Jan 1 21:47:07 2026 read: IOPS=0, BW=1302KiB/s (1333kB/s)(4096KiB/3146msec) clat (nsec): min=217066k, max=217066k, avg=217065601.00, stdev= 0.00 lat (nsec): min=217069k, max=217069k, avg=217068790.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 218], 5.00th=[ 218], 10.00th=[ 218], 20.00th=[ 218], | 30.00th=[ 218], 40.00th=[ 218], 50.00th=[ 218], 60.00th=[ 218], | 70.00th=[ 218], 80.00th=[ 218], 90.00th=[ 218], 95.00th=[ 218], | 99.00th=[ 218], 99.50th=[ 218], 99.90th=[ 218], 99.95th=[ 218], | 99.99th=[ 218] bw ( KiB/s): min= 7111, max= 7111, per=100.00%, avg=7111.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2604KiB/s (2666kB/s)(8192KiB/3146msec); 0 zone resets clat (msec): min=1413, max=1420, avg=1417.01, stdev= 4.50 lat (msec): min=1414, max=1422, avg=1418.49, stdev= 6.09 clat percentiles (msec): | 1.00th=[ 1418], 5.00th=[ 1418], 10.00th=[ 1418], 20.00th=[ 1418], | 30.00th=[ 1418], 40.00th=[ 1418], 50.00th=[ 1418], 60.00th=[ 1418], | 70.00th=[ 1418], 80.00th=[ 1418], 90.00th=[ 1418], 95.00th=[ 1418], | 99.00th=[ 1418], 99.50th=[ 1418], 99.90th=[ 1418], 99.95th=[ 1418], | 99.99th=[ 1418] bw ( KiB/s): min= 8192, max= 8192, per=88.91%, avg=8192.00, stdev= 0.00, samples=1 iops : min= 2, max= 2, avg= 2.00, stdev= 0.00, samples=1 lat (msec) : 250=33.33%, 2000=66.67% cpu : usr=0.10%, sys=4.23%, ctx=54, majf=0, minf=10 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1,2,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=186236: Thu Jan 1 21:47:07 2026 write: IOPS=0, BW=3456KiB/s (3539kB/s)(12.0MiB/3556msec); 0 zone resets clat (msec): min=157, max=1968, avg=1165.55, stdev=922.41 lat (msec): min=158, max=1968, avg=1166.00, stdev=922.12 clat percentiles (msec): | 1.00th=[ 159], 5.00th=[ 159], 10.00th=[ 159], 20.00th=[ 159], | 30.00th=[ 159], 40.00th=[ 1368], 50.00th=[ 1368], 60.00th=[ 1368], | 70.00th=[ 1972], 80.00th=[ 1972], 90.00th=[ 1972], 95.00th=[ 1972], | 99.00th=[ 1972], 99.50th=[ 1972], 99.90th=[ 1972], 99.95th=[ 1972], | 99.99th=[ 1972] bw ( KiB/s): min= 8192, max= 8192, per=88.91%, avg=8192.00, stdev= 0.00, samples=1 iops : min= 2, max= 2, avg= 2.00, stdev= 0.00, samples=1 lat (msec) : 250=33.33%, 2000=66.67% cpu : usr=0.00%, sys=3.21%, ctx=44, majf=0, minf=8 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=186238: Thu Jan 1 21:47:07 2026 write: IOPS=1, BW=5575KiB/s (5709kB/s)(12.0MiB/2204msec); 0 zone resets clat (msec): min=377, max=956, avg=695.75, stdev=293.75 lat (msec): min=377, max=956, avg=696.08, stdev=293.64 clat percentiles (msec): | 1.00th=[ 376], 5.00th=[ 376], 10.00th=[ 376], 20.00th=[ 376], | 30.00th=[ 376], 40.00th=[ 751], 50.00th=[ 751], 60.00th=[ 751], | 70.00th=[ 953], 80.00th=[ 953], 90.00th=[ 953], 95.00th=[ 953], | 99.00th=[ 953], 99.50th=[ 953], 99.90th=[ 953], 99.95th=[ 953], | 99.99th=[ 953] bw ( KiB/s): min= 8143, max= 8159, per=88.46%, avg=8151.00, stdev=11.31, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 1000=66.67% cpu : usr=0.09%, sys=6.31%, ctx=37, majf=0, minf=9 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=5208KiB/s (5333kB/s), 1302KiB/s-4513KiB/s (1333kB/s-4621kB/s), io=16.0MiB (16.8MB), run=2723-3146msec WRITE: bw=9215KiB/s (9436kB/s), 2604KiB/s-5575KiB/s (2666kB/s-5709kB/s), io=32.0MiB (33.6MB), run=2204-3556msec