== sanity test 398b: DIO and buffer IO race ============== 20:18:07 (1789085887) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 5.6923 s, 8.8 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=144134: Thu Sep 10 20:20:45 2026 read: IOPS=10, BW=42.9KiB/s (43.9kB/s)(5992KiB/139816msec) clat (usec): min=32, max=221967, avg=44104.76, stdev=33668.42 lat (usec): min=33, max=221969, avg=44106.52, stdev=33668.50 clat percentiles (usec): | 1.00th=[ 50], 5.00th=[ 59], 10.00th=[ 76], 20.00th=[ 18744], | 30.00th=[ 25035], 40.00th=[ 31065], 50.00th=[ 37487], 60.00th=[ 44303], | 70.00th=[ 55837], 80.00th=[ 67634], 90.00th=[ 89654], 95.00th=[106431], | 99.00th=[147850], 99.50th=[185598], 99.90th=[210764], 99.95th=[221250], | 99.99th=[221250] bw ( KiB/s): min= 7, max= 111, per=25.05%, avg=42.84, stdev=20.11, samples=271 iops : min= 1, max= 27, avg=10.05, stdev= 5.06, samples=271 write: IOPS=11, BW=45.0KiB/s (46.1kB/s)(6296KiB/139816msec); 0 zone resets clat (usec): min=990, max=1183.5k, avg=46588.53, stdev=58060.61 lat (usec): min=991, max=1183.5k, avg=46599.29, stdev=58057.63 clat percentiles (usec): | 1.00th=[ 1205], 5.00th=[ 1369], 10.00th=[ 1811], | 20.00th=[ 4621], 30.00th=[ 8455], 40.00th=[ 19530], | 50.00th=[ 31065], 60.00th=[ 44303], 70.00th=[ 59507], | 80.00th=[ 80217], 90.00th=[ 110625], 95.00th=[ 139461], | 99.00th=[ 225444], 99.50th=[ 252707], 99.90th=[ 484443], | 99.95th=[1182794], 99.99th=[1182794] bw ( KiB/s): min= 7, max= 161, per=24.99%, avg=44.73, stdev=21.65, samples=273 iops : min= 1, max= 40, avg=10.53, stdev= 5.46, samples=273 lat (usec) : 50=0.55%, 100=4.98%, 250=0.36%, 500=0.07%, 750=0.07% lat (usec) : 1000=0.10% lat (msec) : 2=5.66%, 4=3.61%, 10=7.62%, 20=8.63%, 50=32.65% lat (msec) : 100=26.27%, 250=9.15%, 500=0.26%, 2000=0.03% cpu : usr=0.08%, sys=5.19%, ctx=6543, 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=144135: Thu Sep 10 20:20:45 2026 read: IOPS=10, BW=43.5KiB/s (44.6kB/s)(5940KiB/136531msec) clat (usec): min=34, max=1269.3k, avg=44201.77, stdev=50541.07 lat (usec): min=34, max=1269.3k, avg=44204.88, stdev=50541.35 clat percentiles (usec): | 1.00th=[ 50], 5.00th=[ 58], 10.00th=[ 77], | 20.00th=[ 18220], 30.00th=[ 24249], 40.00th=[ 30016], | 50.00th=[ 36439], 60.00th=[ 43779], 70.00th=[ 52691], | 80.00th=[ 64226], 90.00th=[ 83362], 95.00th=[ 103285], | 99.00th=[ 177210], 99.50th=[ 233833], 99.90th=[ 566232], | 99.95th=[1266680], 99.99th=[1266680] bw ( KiB/s): min= 7, max= 135, per=25.70%, avg=43.95, stdev=20.02, samples=263 iops : min= 1, max= 33, avg=10.33, stdev= 5.03, samples=263 write: IOPS=11, BW=46.5KiB/s (47.6kB/s)(6348KiB/136531msec); 0 zone resets clat (usec): min=787, max=500774, avg=44418.64, stdev=47215.53 lat (usec): min=788, max=500774, avg=44422.05, stdev=47215.99 clat percentiles (usec): | 1.00th=[ 1221], 5.00th=[ 1369], 10.00th=[ 1876], 20.00th=[ 4424], | 30.00th=[ 8717], 40.00th=[ 18744], 50.00th=[ 32113], 60.00th=[ 43779], | 70.00th=[ 57410], 80.00th=[ 76022], 90.00th=[107480], 95.00th=[137364], | 99.00th=[189793], 99.50th=[217056], 99.90th=[367002], 99.95th=[501220], | 99.99th=[501220] bw ( KiB/s): min= 7, max= 141, per=25.98%, avg=46.50, stdev=21.53, samples=265 iops : min= 1, max= 35, avg=10.97, stdev= 5.41, samples=265 lat (usec) : 50=0.55%, 100=4.75%, 250=0.39%, 500=0.07%, 750=0.03% lat (usec) : 1000=0.13% lat (msec) : 2=5.57%, 4=4.46%, 10=7.29%, 20=8.79%, 50=33.95% lat (msec) : 100=24.61%, 250=9.08%, 500=0.23%, 750=0.07%, 2000=0.03% cpu : usr=0.07%, sys=5.18%, ctx=6464, majf=0, minf=19 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=144136: Thu Sep 10 20:20:45 2026 read: IOPS=11, BW=44.3KiB/s (45.4kB/s)(6028KiB/135970msec) clat (usec): min=36, max=380372, avg=43172.27, stdev=36196.03 lat (usec): min=36, max=380373, avg=43174.84, stdev=36197.55 clat percentiles (usec): | 1.00th=[ 49], 5.00th=[ 60], 10.00th=[ 92], 20.00th=[ 18220], | 30.00th=[ 23725], 40.00th=[ 29230], 50.00th=[ 34866], 60.00th=[ 42730], | 70.00th=[ 52691], 80.00th=[ 66323], 90.00th=[ 86508], 95.00th=[102237], | 99.00th=[156238], 99.50th=[210764], 99.90th=[371196], 99.95th=[379585], | 99.99th=[379585] bw ( KiB/s): min= 7, max= 111, per=25.91%, avg=44.30, stdev=20.32, samples=265 iops : min= 1, max= 27, avg=10.42, stdev= 5.12, samples=265 write: IOPS=11, BW=46.0KiB/s (47.1kB/s)(6260KiB/135970msec); 0 zone resets clat (usec): min=936, max=1238.4k, avg=45031.38, stdev=55019.18 lat (usec): min=937, max=1238.4k, avg=45033.26, stdev=55019.30 clat percentiles (usec): | 1.00th=[ 1221], 5.00th=[ 1369], 10.00th=[ 1827], | 20.00th=[ 4883], 30.00th=[ 9896], 40.00th=[ 21103], | 50.00th=[ 32113], 60.00th=[ 45351], 70.00th=[ 58459], | 80.00th=[ 74974], 90.00th=[ 104334], 95.00th=[ 128451], | 99.00th=[ 183501], 99.50th=[ 225444], 99.90th=[ 509608], | 99.95th=[1233126], 99.99th=[1233126] bw ( KiB/s): min= 7, max= 104, per=25.61%, avg=45.84, stdev=19.96, samples=266 iops : min= 1, max= 26, avg=10.80, stdev= 5.03, samples=266 lat (usec) : 50=0.62%, 100=4.43%, 250=0.36%, 500=0.10%, 750=0.03% lat (usec) : 1000=0.07% lat (msec) : 2=5.40%, 4=3.39%, 10=7.00%, 20=9.90%, 50=33.92% lat (msec) : 100=26.50%, 250=7.98%, 500=0.26%, 750=0.03%, 2000=0.03% cpu : usr=0.08%, sys=5.19%, ctx=6416, majf=0, minf=17 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144137: Thu Sep 10 20:20:45 2026 read: IOPS=10, BW=43.7KiB/s (44.7kB/s)(6052KiB/138631msec) clat (usec): min=31, max=394738, avg=42918.25, stdev=34728.42 lat (usec): min=31, max=394740, avg=42924.03, stdev=34727.39 clat percentiles (usec): | 1.00th=[ 42], 5.00th=[ 58], 10.00th=[ 77], 20.00th=[ 19006], | 30.00th=[ 23725], 40.00th=[ 29492], 50.00th=[ 36439], 60.00th=[ 43254], | 70.00th=[ 52167], 80.00th=[ 66323], 90.00th=[ 87557], 95.00th=[102237], | 99.00th=[166724], 99.50th=[196084], 99.90th=[252707], 99.95th=[396362], | 99.99th=[396362] bw ( KiB/s): min= 7, max= 120, per=25.60%, avg=43.78, stdev=21.00, samples=268 iops : min= 1, max= 30, avg=10.28, stdev= 5.27, samples=268 write: IOPS=11, BW=44.0KiB/s (46.1kB/s)(6236KiB/138631msec); 0 zone resets clat (usec): min=892, max=1265.8k, avg=46990.01, stdev=57952.60 lat (usec): min=894, max=1265.8k, avg=46995.55, stdev=57950.37 clat percentiles (usec): | 1.00th=[ 1237], 5.00th=[ 1369], 10.00th=[ 1926], | 20.00th=[ 4883], 30.00th=[ 10159], 40.00th=[ 20841], | 50.00th=[ 33162], 60.00th=[ 45876], 70.00th=[ 61604], | 80.00th=[ 81265], 90.00th=[ 109577], 95.00th=[ 133694], | 99.00th=[ 198181], 99.50th=[ 238027], 99.90th=[ 541066], | 99.95th=[1266680], 99.99th=[1266680] bw ( KiB/s): min= 7, max= 167, per=25.02%, avg=44.78, stdev=21.57, samples=270 iops : min= 1, max= 41, avg=10.53, stdev= 5.41, samples=270 lat (usec) : 50=0.88%, 100=4.52%, 250=0.33%, 500=0.13%, 750=0.03% lat (usec) : 1000=0.03% lat (msec) : 2=5.21%, 4=3.94%, 10=6.64%, 20=8.72%, 50=34.90% lat (msec) : 100=25.42%, 250=8.95%, 500=0.23%, 750=0.03%, 2000=0.03% cpu : usr=0.06%, sys=5.25%, ctx=6509, majf=0, minf=19 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=172KiB/s (176kB/s), 42.9KiB/s-44.3KiB/s (43.9kB/s-45.4kB/s), io=23.4MiB (24.6MB), run=135970-139816msec WRITE: bw=180KiB/s (184kB/s), 44.0KiB/s-46.5KiB/s (46.1kB/s-47.6kB/s), io=24.6MiB (25.7MB), run=135970-139816msec fio: pid=144140, err=5/file:backend.c:481, func=full resid, error=Input/output error rand-rw: (groupid=0, jobs=1): err= 0: pid=144139: Thu Sep 10 20:22:57 2026 read: IOPS=5, BW=22.1KiB/s (22.7kB/s)(5992KiB/270701msec) clat (msec): min=5, max=1356, avg=38.68, stdev=52.88 lat (msec): min=5, max=1356, avg=38.68, stdev=52.88 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 21], 50.00th=[ 26], 60.00th=[ 32], | 70.00th=[ 39], 80.00th=[ 51], 90.00th=[ 82], 95.00th=[ 115], | 99.00th=[ 180], 99.50th=[ 241], 99.90th=[ 584], 99.95th=[ 1351], | 99.99th=[ 1351] bw ( KiB/s): min= 7, max= 95, per=31.79%, avg=25.11, stdev=17.09, samples=460 iops : min= 1, max= 23, avg= 5.65, stdev= 4.32, samples=460 write: IOPS=5, BW=23.3KiB/s (23.8kB/s)(6296KiB/270701msec); 0 zone resets clat (msec): min=38, max=574, avg=135.04, stdev=75.92 lat (msec): min=38, max=574, avg=135.04, stdev=75.93 clat percentiles (msec): | 1.00th=[ 46], 5.00th=[ 59], 10.00th=[ 66], 20.00th=[ 78], | 30.00th=[ 89], 40.00th=[ 101], 50.00th=[ 112], 60.00th=[ 127], | 70.00th=[ 146], 80.00th=[ 182], 90.00th=[ 243], 95.00th=[ 292], | 99.00th=[ 401], 99.50th=[ 447], 99.90th=[ 531], 99.95th=[ 575], | 99.99th=[ 575] bw ( KiB/s): min= 7, max= 55, per=27.75%, avg=23.03, stdev=11.47, samples=525 iops : min= 1, max= 13, avg= 5.12, stdev= 2.92, samples=525 lat (msec) : 10=4.23%, 20=14.45%, 50=21.06%, 100=26.07%, 250=29.26% lat (msec) : 500=4.75%, 750=0.13%, 2000=0.03% cpu : usr=0.04%, sys=1.32%, ctx=5745, 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= 5 (file:backend.c:481, func=full resid, error=Input/output error): pid=144140: Thu Sep 10 20:22:57 2026 read: IOPS=4, BW=18.4KiB/s (18.8kB/s)(3572KiB/194430msec) clat (msec): min=4, max=1300, avg=47.61, stdev=64.82 lat (msec): min=4, max=1300, avg=47.61, stdev=64.82 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 19], 40.00th=[ 23], 50.00th=[ 28], 60.00th=[ 37], | 70.00th=[ 51], 80.00th=[ 72], 90.00th=[ 102], 95.00th=[ 138], | 99.00th=[ 220], 99.50th=[ 288], 99.90th=[ 1301], 99.95th=[ 1301], | 99.99th=[ 1301] bw ( KiB/s): min= 7, max= 95, per=28.02%, avg=22.14, stdev=16.50, samples=309 iops : min= 1, max= 23, avg= 4.87, stdev= 4.15, samples=309 write: IOPS=4, BW=19.0KiB/s (20.4kB/s)(3880KiB/194430msec); 0 zone resets clat (msec): min=36, max=577, avg=156.43, stdev=85.67 lat (msec): min=36, max=577, avg=156.45, stdev=85.66 clat percentiles (msec): | 1.00th=[ 50], 5.00th=[ 63], 10.00th=[ 72], 20.00th=[ 86], | 30.00th=[ 99], 40.00th=[ 114], 50.00th=[ 134], 60.00th=[ 159], | 70.00th=[ 186], 80.00th=[ 222], 90.00th=[ 271], 95.00th=[ 321], | 99.00th=[ 451], 99.50th=[ 506], 99.90th=[ 575], 99.95th=[ 575], | 99.99th=[ 575] bw ( KiB/s): min= 7, max= 55, per=23.99%, avg=19.91, stdev=11.19, samples=373 iops : min= 1, max= 13, avg= 4.31, stdev= 2.84, samples=373 lat (msec) : 10=3.22%, 20=13.04%, 50=18.03%, 100=24.95%, 250=33.48% lat (msec) : 500=6.81%, 750=0.38%, 2000=0.05% cpu : usr=0.03%, sys=1.10%, ctx=2968, majf=0, minf=19 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=894,970,0,0 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=144141: Thu Sep 10 20:22:57 2026 read: IOPS=5, BW=22.4KiB/s (22.9kB/s)(6028KiB/269454msec) clat (msec): min=4, max=375, avg=39.78, stdev=38.19 lat (msec): min=4, max=375, avg=39.79, stdev=38.19 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 9], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 19], 40.00th=[ 22], 50.00th=[ 27], 60.00th=[ 33], | 70.00th=[ 42], 80.00th=[ 57], 90.00th=[ 88], 95.00th=[ 112], | 99.00th=[ 192], 99.50th=[ 220], 99.90th=[ 334], 99.95th=[ 376], | 99.99th=[ 376] bw ( KiB/s): min= 7, max= 103, per=30.66%, avg=24.22, stdev=17.46, samples=480 iops : min= 1, max= 25, avg= 5.42, stdev= 4.39, samples=480 write: IOPS=5, BW=23.2KiB/s (23.8kB/s)(6260KiB/269454msec); 0 zone resets clat (msec): min=32, max=1429, avg=133.78, stdev=79.76 lat (msec): min=32, max=1429, avg=133.78, stdev=79.76 clat percentiles (msec): | 1.00th=[ 45], 5.00th=[ 58], 10.00th=[ 67], 20.00th=[ 79], | 30.00th=[ 88], 40.00th=[ 99], 50.00th=[ 112], 60.00th=[ 127], | 70.00th=[ 148], 80.00th=[ 184], 90.00th=[ 230], 95.00th=[ 275], | 99.00th=[ 405], 99.50th=[ 464], 99.90th=[ 617], 99.95th=[ 1435], | 99.99th=[ 1435] bw ( KiB/s): min= 7, max= 63, per=27.94%, avg=23.19, stdev=11.90, samples=520 iops : min= 1, max= 15, avg= 5.16, stdev= 3.02, samples=520 lat (msec) : 10=3.55%, 20=13.61%, 50=21.52%, 100=27.90%, 250=29.36% lat (msec) : 500=3.94%, 750=0.10%, 2000=0.03% cpu : usr=0.05%, sys=1.39%, ctx=5668, 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=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=144142: Thu Sep 10 20:22:57 2026 read: IOPS=5, BW=22.6KiB/s (23.1kB/s)(6052KiB/268353msec) clat (msec): min=4, max=318, avg=38.40, stdev=38.35 lat (msec): min=4, max=318, avg=38.40, stdev=38.35 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 18], 40.00th=[ 22], 50.00th=[ 26], 60.00th=[ 32], | 70.00th=[ 40], 80.00th=[ 53], 90.00th=[ 83], 95.00th=[ 112], | 99.00th=[ 201], 99.50th=[ 271], 99.90th=[ 305], 99.95th=[ 317], | 99.99th=[ 317] bw ( KiB/s): min= 7, max= 103, per=32.73%, avg=25.86, stdev=16.82, samples=453 iops : min= 1, max= 25, avg= 5.83, stdev= 4.22, samples=453 write: IOPS=5, BW=23.2KiB/s (23.8kB/s)(6236KiB/268353msec); 0 zone resets clat (msec): min=36, max=1481, avg=134.77, stdev=80.65 lat (msec): min=36, max=1481, avg=134.77, stdev=80.65 clat percentiles (msec): | 1.00th=[ 48], 5.00th=[ 59], 10.00th=[ 67], 20.00th=[ 80], | 30.00th=[ 88], 40.00th=[ 99], 50.00th=[ 110], 60.00th=[ 126], | 70.00th=[ 148], 80.00th=[ 186], 90.00th=[ 241], 95.00th=[ 284], | 99.00th=[ 376], 99.50th=[ 422], 99.90th=[ 542], 99.95th=[ 1485], | 99.99th=[ 1485] bw ( KiB/s): min= 7, max= 55, per=27.90%, avg=23.16, stdev=11.62, samples=519 iops : min= 1, max= 13, avg= 5.15, stdev= 2.96, samples=519 lat (msec) : 10=3.97%, 20=14.42%, 50=21.13%, 100=27.51%, 250=28.58% lat (msec) : 500=4.26%, 750=0.10%, 2000=0.03% cpu : usr=0.04%, sys=1.33%, ctx=5758, 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=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=79.0KiB/s (81.9kB/s), 18.4KiB/s-22.6KiB/s (18.8kB/s-23.1kB/s), io=21.1MiB (22.2MB), run=194430-270701msec WRITE: bw=83.8KiB/s (85.8kB/s), 19.0KiB/s-23.3KiB/s (20.4kB/s-23.8kB/s), io=22.1MiB (23.2MB), run=194430-270701msec 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=144211: Thu Sep 10 20:23:33 2026 read: IOPS=15, BW=249KiB/s (255kB/s)(5920KiB/23815msec) clat (usec): min=30, max=202051, avg=31725.78, stdev=29765.51 lat (usec): min=30, max=202053, avg=31727.00, stdev=29765.57 clat percentiles (usec): | 1.00th=[ 40], 5.00th=[ 46], 10.00th=[ 59], 20.00th=[ 67], | 30.00th=[ 359], 40.00th=[ 22676], 50.00th=[ 29754], 60.00th=[ 35390], | 70.00th=[ 44303], 80.00th=[ 54789], 90.00th=[ 69731], 95.00th=[ 77071], | 99.00th=[120062], 99.50th=[164627], 99.90th=[202376], 99.95th=[202376], | 99.99th=[202376] bw ( KiB/s): min= 125, max= 446, per=25.06%, avg=245.33, stdev=83.04, samples=46 iops : min= 7, max= 27, avg=14.57, stdev= 5.24, samples=46 write: IOPS=16, BW=267KiB/s (274kB/s)(6368KiB/23815msec); 0 zone resets clat (usec): min=1485, max=313108, avg=30261.89, stdev=34260.91 lat (usec): min=1487, max=313111, avg=30267.28, stdev=34263.39 clat percentiles (usec): | 1.00th=[ 1729], 5.00th=[ 1942], 10.00th=[ 2278], 20.00th=[ 4621], | 30.00th=[ 7177], 40.00th=[ 10945], 50.00th=[ 17695], 60.00th=[ 28181], | 70.00th=[ 39060], 80.00th=[ 55313], 90.00th=[ 69731], 95.00th=[ 90702], | 99.00th=[147850], 99.50th=[177210], 99.90th=[312476], 99.95th=[312476], | 99.99th=[312476] bw ( KiB/s): min= 31, max= 540, per=25.81%, avg=265.89, stdev=109.78, samples=46 iops : min= 1, max= 33, avg=15.85, stdev= 6.94, samples=46 lat (usec) : 50=3.12%, 100=10.55%, 250=0.65%, 500=0.13%, 750=0.13% lat (msec) : 2=3.91%, 4=5.73%, 10=10.81%, 20=9.38%, 50=32.29% lat (msec) : 100=20.44%, 250=2.73%, 500=0.13% cpu : usr=0.10%, sys=6.87%, ctx=1411, 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=144212: Thu Sep 10 20:23:33 2026 read: IOPS=14, BW=238KiB/s (244kB/s)(5744KiB/24129msec) clat (usec): min=36, max=183956, avg=33542.55, stdev=27933.02 lat (usec): min=36, max=183958, avg=33543.85, stdev=27933.06 clat percentiles (usec): | 1.00th=[ 42], 5.00th=[ 56], 10.00th=[ 62], 20.00th=[ 88], | 30.00th=[ 21365], 40.00th=[ 26608], 50.00th=[ 32375], 60.00th=[ 37487], | 70.00th=[ 44827], 80.00th=[ 51643], 90.00th=[ 68682], 95.00th=[ 81265], | 99.00th=[124257], 99.50th=[164627], 99.90th=[183501], 99.95th=[183501], | 99.99th=[183501] bw ( KiB/s): min= 95, max= 442, per=24.73%, avg=242.13, stdev=87.64, samples=46 iops : min= 5, max= 27, avg=14.35, stdev= 5.54, samples=46 write: IOPS=16, BW=271KiB/s (278kB/s)(6544KiB/24129msec); 0 zone resets clat (usec): min=1052, max=244511, avg=29461.11, stdev=31994.99 lat (usec): min=1054, max=244514, avg=29463.85, stdev=31995.12 clat percentiles (usec): | 1.00th=[ 1549], 5.00th=[ 1876], 10.00th=[ 2671], 20.00th=[ 4178], | 30.00th=[ 6652], 40.00th=[ 10683], 50.00th=[ 17171], 60.00th=[ 26346], | 70.00th=[ 38536], 80.00th=[ 53216], 90.00th=[ 71828], 95.00th=[ 89654], | 99.00th=[120062], 99.50th=[156238], 99.90th=[244319], 99.95th=[244319], | 99.99th=[244319] bw ( KiB/s): min= 62, max= 569, per=26.17%, avg=269.51, stdev=107.20, samples=47 iops : min= 3, max= 35, avg=16.06, stdev= 6.75, samples=47 lat (usec) : 50=1.95%, 100=7.94%, 250=0.39%, 500=0.26%, 750=0.39% lat (msec) : 2=4.17%, 4=6.90%, 10=10.16%, 20=9.11%, 50=36.33% lat (msec) : 100=19.66%, 250=2.73% cpu : usr=0.05%, sys=6.43%, ctx=1374, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=359,409,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144213: Thu Sep 10 20:23:33 2026 read: IOPS=15, BW=256KiB/s (262kB/s)(6256KiB/24450msec) clat (usec): min=36, max=274609, avg=33226.96, stdev=33031.04 lat (usec): min=36, max=274609, avg=33229.57, stdev=33032.26 clat percentiles (usec): | 1.00th=[ 40], 5.00th=[ 55], 10.00th=[ 61], 20.00th=[ 74], | 30.00th=[ 15270], 40.00th=[ 24773], 50.00th=[ 30540], 60.00th=[ 36439], | 70.00th=[ 44303], 80.00th=[ 53216], 90.00th=[ 70779], 95.00th=[ 83362], | 99.00th=[154141], 99.50th=[261096], 99.90th=[274727], 99.95th=[274727], | 99.99th=[274727] bw ( KiB/s): min= 63, max= 505, per=26.16%, avg=256.10, stdev=92.70, samples=48 iops : min= 3, max= 31, avg=15.23, stdev= 5.87, samples=48 write: IOPS=15, BW=247KiB/s (253kB/s)(6032KiB/24450msec); 0 zone resets clat (usec): min=1305, max=213754, avg=30308.34, stdev=33310.16 lat (usec): min=1307, max=213757, avg=30310.49, stdev=33310.16 clat percentiles (usec): | 1.00th=[ 1663], 5.00th=[ 1909], 10.00th=[ 2573], 20.00th=[ 5014], | 30.00th=[ 7767], 40.00th=[ 12387], 50.00th=[ 19006], 60.00th=[ 27132], | 70.00th=[ 35390], 80.00th=[ 52691], 90.00th=[ 72877], 95.00th=[ 92799], | 99.00th=[160433], 99.50th=[204473], 99.90th=[212861], 99.95th=[212861], | 99.99th=[212861] bw ( KiB/s): min= 62, max= 471, per=24.17%, avg=248.91, stdev=97.30, samples=47 iops : min= 3, max= 29, avg=14.79, stdev= 6.19, samples=47 lat (usec) : 50=1.82%, 100=10.42%, 250=0.91%, 500=0.26%, 750=0.39% lat (msec) : 2=3.39%, 4=4.95%, 10=9.51%, 20=9.90%, 50=36.07% lat (msec) : 100=19.66%, 250=2.47%, 500=0.26% cpu : usr=0.07%, sys=6.15%, ctx=1391, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144214: Thu Sep 10 20:23:33 2026 read: IOPS=15, BW=248KiB/s (254kB/s)(6032KiB/24343msec) clat (usec): min=33, max=189467, avg=33009.69, stdev=28855.34 lat (usec): min=34, max=189469, avg=33010.90, stdev=28855.37 clat percentiles (usec): | 1.00th=[ 41], 5.00th=[ 54], 10.00th=[ 62], 20.00th=[ 74], | 30.00th=[ 19268], 40.00th=[ 25560], 50.00th=[ 31851], 60.00th=[ 36439], | 70.00th=[ 44303], 80.00th=[ 53740], 90.00th=[ 68682], 95.00th=[ 82314], | 99.00th=[128451], 99.50th=[139461], 99.90th=[189793], 99.95th=[189793], | 99.99th=[189793] bw ( KiB/s): min= 63, max= 502, per=25.78%, avg=252.36, stdev=94.29, samples=47 iops : min= 3, max= 31, avg=15.00, stdev= 5.96, samples=47 write: IOPS=16, BW=257KiB/s (263kB/s)(6256KiB/24343msec); 0 zone resets clat (usec): min=1488, max=274308, avg=30316.44, stdev=35967.72 lat (usec): min=1488, max=274309, avg=30325.65, stdev=35962.65 clat percentiles (usec): | 1.00th=[ 1565], 5.00th=[ 1876], 10.00th=[ 2114], 20.00th=[ 3884], | 30.00th=[ 6325], 40.00th=[ 9765], 50.00th=[ 15139], 60.00th=[ 25560], | 70.00th=[ 37487], 80.00th=[ 54789], 90.00th=[ 78119], 95.00th=[100140], | 99.00th=[170918], 99.50th=[208667], 99.90th=[274727], 99.95th=[274727], | 99.99th=[274727] bw ( KiB/s): min= 63, max= 508, per=24.95%, avg=257.00, stdev=93.18, samples=48 iops : min= 3, max= 31, avg=15.31, stdev= 5.89, samples=48 lat (usec) : 50=1.82%, 100=9.64%, 250=0.78%, 500=0.65%, 750=0.13% lat (usec) : 1000=0.26% lat (msec) : 2=4.43%, 4=6.12%, 10=10.29%, 20=9.24%, 50=34.51% lat (msec) : 100=18.62%, 250=3.39%, 500=0.13% cpu : usr=0.08%, sys=6.67%, ctx=1415, majf=0, minf=17 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=980KiB/s (1003kB/s), 238KiB/s-256KiB/s (244kB/s-262kB/s), io=23.4MiB (24.5MB), run=23815-24450msec WRITE: bw=1031KiB/s (1055kB/s), 247KiB/s-271KiB/s (253kB/s-278kB/s), io=24.6MiB (25.8MB), run=23815-24450msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144206: Thu Sep 10 20:24:10 2026 read: IOPS=6, BW=96.0KiB/s (98.3kB/s)(5920KiB/61647msec) clat (msec): min=6, max=387, avg=33.82, stdev=32.58 lat (msec): min=6, max=387, avg=33.82, stdev=32.58 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 21], 50.00th=[ 24], 60.00th=[ 29], | 70.00th=[ 35], 80.00th=[ 45], 90.00th=[ 71], 95.00th=[ 96], | 99.00th=[ 146], 99.50th=[ 155], 99.90th=[ 388], 99.95th=[ 388], | 99.99th=[ 388] bw ( KiB/s): min= 30, max= 351, per=26.01%, avg=100.91, stdev=63.74, samples=113 iops : min= 1, max= 21, avg= 5.57, stdev= 4.05, samples=113 write: IOPS=6, BW=103KiB/s (106kB/s)(6368KiB/61647msec); 0 zone resets clat (msec): min=35, max=399, avg=123.03, stdev=56.25 lat (msec): min=35, max=399, avg=123.06, stdev=56.24 clat percentiles (msec): | 1.00th=[ 44], 5.00th=[ 57], 10.00th=[ 63], 20.00th=[ 78], | 30.00th=[ 91], 40.00th=[ 103], 50.00th=[ 112], 60.00th=[ 125], | 70.00th=[ 140], 80.00th=[ 159], 90.00th=[ 197], 95.00th=[ 241], | 99.00th=[ 313], 99.50th=[ 359], 99.90th=[ 401], 99.95th=[ 401], | 99.99th=[ 401] bw ( KiB/s): min= 31, max= 223, per=25.28%, avg=103.12, stdev=43.92, samples=120 iops : min= 1, max= 13, avg= 5.70, stdev= 2.82, samples=120 lat (msec) : 10=2.73%, 20=16.15%, 50=22.27%, 100=25.39%, 250=30.99% lat (msec) : 500=2.47% cpu : usr=0.06%, sys=1.51%, ctx=1349, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144207: Thu Sep 10 20:24:10 2026 read: IOPS=5, BW=93.5KiB/s (95.7kB/s)(5744KiB/61448msec) clat (msec): min=5, max=346, avg=35.38, stdev=34.52 lat (msec): min=5, max=346, avg=35.38, stdev=34.52 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 15], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 24], 60.00th=[ 28], | 70.00th=[ 34], 80.00th=[ 46], 90.00th=[ 80], 95.00th=[ 111], | 99.00th=[ 148], 99.50th=[ 205], 99.90th=[ 347], 99.95th=[ 347], | 99.99th=[ 347] bw ( KiB/s): min= 21, max= 381, per=27.04%, avg=104.91, stdev=69.58, samples=107 iops : min= 1, max= 23, avg= 5.79, stdev= 4.41, samples=107 write: IOPS=6, BW=106KiB/s (109kB/s)(6544KiB/61448msec); 0 zone resets clat (msec): min=41, max=709, avg=118.97, stdev=61.49 lat (msec): min=41, max=709, avg=118.98, stdev=61.48 clat percentiles (msec): | 1.00th=[ 50], 5.00th=[ 58], 10.00th=[ 67], 20.00th=[ 77], | 30.00th=[ 87], 40.00th=[ 95], 50.00th=[ 105], 60.00th=[ 117], | 70.00th=[ 131], 80.00th=[ 146], 90.00th=[ 190], 95.00th=[ 224], | 99.00th=[ 321], 99.50th=[ 342], 99.90th=[ 709], 99.95th=[ 709], | 99.99th=[ 709] bw ( KiB/s): min= 31, max= 192, per=26.37%, avg=107.59, stdev=46.17, samples=119 iops : min= 1, max= 12, avg= 5.97, stdev= 3.01, samples=119 lat (msec) : 10=2.21%, 20=15.63%, 50=21.48%, 100=29.17%, 250=29.43% lat (msec) : 500=1.95%, 750=0.13% cpu : usr=0.04%, sys=1.45%, ctx=1383, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=359,409,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144208: Thu Sep 10 20:24:10 2026 read: IOPS=6, BW=104KiB/s (106kB/s)(6256KiB/60198msec) clat (msec): min=5, max=343, avg=33.66, stdev=32.42 lat (msec): min=5, max=343, avg=33.67, stdev=32.44 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 15], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 24], 60.00th=[ 29], | 70.00th=[ 35], 80.00th=[ 45], 90.00th=[ 68], 95.00th=[ 93], | 99.00th=[ 178], 99.50th=[ 232], 99.90th=[ 342], 99.95th=[ 342], | 99.99th=[ 342] bw ( KiB/s): min= 31, max= 381, per=28.89%, avg=112.08, stdev=75.45, samples=110 iops : min= 1, max= 23, avg= 6.25, stdev= 4.78, samples=110 write: IOPS=6, BW=100KiB/s (103kB/s)(6032KiB/60198msec); 0 zone resets clat (msec): min=40, max=572, avg=124.29, stdev=60.66 lat (msec): min=40, max=572, avg=124.30, stdev=60.66 clat percentiles (msec): | 1.00th=[ 50], 5.00th=[ 59], 10.00th=[ 65], 20.00th=[ 79], | 30.00th=[ 87], 40.00th=[ 100], 50.00th=[ 109], 60.00th=[ 124], | 70.00th=[ 140], 80.00th=[ 163], 90.00th=[ 201], 95.00th=[ 239], | 99.00th=[ 334], 99.50th=[ 363], 99.90th=[ 575], 99.95th=[ 575], | 99.99th=[ 575] bw ( KiB/s): min= 31, max= 224, per=24.64%, avg=100.55, stdev=44.58, samples=117 iops : min= 1, max= 14, avg= 5.53, stdev= 2.86, samples=117 lat (msec) : 10=2.34%, 20=18.23%, 50=22.53%, 100=25.78%, 250=29.04% lat (msec) : 500=1.95%, 750=0.13% cpu : usr=0.05%, sys=1.59%, ctx=1380, 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=144209: Thu Sep 10 20:24:10 2026 read: IOPS=6, BW=99.1KiB/s (101kB/s)(6032KiB/60859msec) clat (msec): min=6, max=251, avg=35.40, stdev=32.89 lat (msec): min=6, max=251, avg=35.40, stdev=32.89 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 19], 40.00th=[ 22], 50.00th=[ 25], 60.00th=[ 29], | 70.00th=[ 36], 80.00th=[ 46], 90.00th=[ 75], 95.00th=[ 94], | 99.00th=[ 155], 99.50th=[ 249], 99.90th=[ 251], 99.95th=[ 251], | 99.99th=[ 251] bw ( KiB/s): min= 31, max= 383, per=27.07%, avg=105.04, stdev=72.19, samples=112 iops : min= 1, max= 23, avg= 5.81, stdev= 4.55, samples=112 write: IOPS=6, BW=103KiB/s (105kB/s)(6256KiB/60859msec); 0 zone resets clat (msec): min=36, max=700, avg=121.08, stdev=60.33 lat (msec): min=36, max=700, avg=121.09, stdev=60.33 clat percentiles (msec): | 1.00th=[ 49], 5.00th=[ 62], 10.00th=[ 70], 20.00th=[ 80], | 30.00th=[ 88], 40.00th=[ 97], 50.00th=[ 107], 60.00th=[ 118], | 70.00th=[ 132], 80.00th=[ 155], 90.00th=[ 197], 95.00th=[ 222], | 99.00th=[ 326], 99.50th=[ 422], 99.90th=[ 701], 99.95th=[ 701], | 99.99th=[ 701] bw ( KiB/s): min= 30, max= 192, per=25.62%, avg=104.53, stdev=43.79, samples=118 iops : min= 1, max= 12, avg= 5.77, stdev= 2.85, samples=118 lat (msec) : 10=1.82%, 20=16.28%, 50=22.92%, 100=27.47%, 250=30.21% lat (msec) : 500=1.17%, 750=0.13% cpu : usr=0.05%, sys=1.56%, ctx=1386, 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=389KiB/s (398kB/s), 93.5KiB/s-104KiB/s (95.7kB/s-106kB/s), io=23.4MiB (24.5MB), run=60198-61647msec WRITE: bw=409KiB/s (419kB/s), 100KiB/s-106KiB/s (103kB/s-109kB/s), io=24.6MiB (25.8MB), run=60198-61647msec 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=144235: Thu Sep 10 20:24:27 2026 read: IOPS=1, BW=1299KiB/s (1331kB/s)(7168KiB/5516msec) clat (usec): min=562, max=2724.1k, avg=512575.67, stdev=981788.83 lat (usec): min=564, max=2724.1k, avg=512577.01, stdev=981789.54 clat percentiles (usec): | 1.00th=[ 562], 5.00th=[ 562], 10.00th=[ 562], | 20.00th=[ 1614], 30.00th=[ 149947], 40.00th=[ 149947], | 50.00th=[ 164627], 60.00th=[ 235930], 70.00th=[ 235930], | 80.00th=[ 312476], 90.00th=[2734687], 95.00th=[2734687], | 99.00th=[2734687], 99.50th=[2734687], 99.90th=[2734687], | 99.95th=[2734687], 99.99th=[2734687] bw ( KiB/s): min= 1976, max= 6144, per=100.00%, avg=3389.33, stdev=2385.88, samples=3 iops : min= 1, max= 6, avg= 3.00, stdev= 2.65, samples=3 write: IOPS=0, BW=928KiB/s (950kB/s)(5120KiB/5516msec); 0 zone resets clat (msec): min=215, max=681, avg=358.25, stdev=192.99 lat (msec): min=215, max=681, avg=358.40, stdev=192.96 clat percentiles (msec): | 1.00th=[ 215], 5.00th=[ 215], 10.00th=[ 215], 20.00th=[ 215], | 30.00th=[ 245], 40.00th=[ 245], 50.00th=[ 257], 60.00th=[ 257], | 70.00th=[ 393], 80.00th=[ 393], 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= 2048, max= 4087, per=71.27%, avg=3067.50, stdev=1441.79, samples=2 iops : min= 2, max= 3, avg= 2.50, stdev= 0.71, samples=2 lat (usec) : 750=8.33% lat (msec) : 2=8.33%, 250=41.67%, 500=25.00%, 750=8.33%, >=2000=8.33% cpu : usr=0.02%, sys=8.23%, ctx=619, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=7,5,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144236: Thu Sep 10 20:24:27 2026 read: IOPS=0, BW=307KiB/s (315kB/s)(2048KiB/6661msec) clat (msec): min=249, max=381, avg=315.43, stdev=92.84 lat (msec): min=249, max=381, avg=315.44, stdev=92.84 clat percentiles (msec): | 1.00th=[ 251], 5.00th=[ 251], 10.00th=[ 251], 20.00th=[ 251], | 30.00th=[ 251], 40.00th=[ 251], 50.00th=[ 251], 60.00th=[ 380], | 70.00th=[ 380], 80.00th=[ 380], 90.00th=[ 380], 95.00th=[ 380], | 99.00th=[ 380], 99.50th=[ 380], 99.90th=[ 380], 99.95th=[ 380], | 99.99th=[ 380] bw ( KiB/s): min= 1612, max= 2043, per=59.45%, avg=1827.50, stdev=304.76, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1537KiB/s (1574kB/s)(10.0MiB/6661msec); 0 zone resets clat (msec): min=117, max=2914, avg=579.19, stdev=843.18 lat (msec): min=117, max=2914, avg=579.26, stdev=843.18 clat percentiles (msec): | 1.00th=[ 118], 5.00th=[ 118], 10.00th=[ 118], 20.00th=[ 174], | 30.00th=[ 182], 40.00th=[ 218], 50.00th=[ 305], 60.00th=[ 330], | 70.00th=[ 368], 80.00th=[ 376], 90.00th=[ 810], 95.00th=[ 2903], | 99.00th=[ 2903], 99.50th=[ 2903], 99.90th=[ 2903], 99.95th=[ 2903], | 99.99th=[ 2903] bw ( KiB/s): min= 2011, max= 4096, per=75.27%, avg=3239.80, stdev=1108.73, samples=5 iops : min= 1, max= 4, avg= 2.60, stdev= 1.52, samples=5 lat (msec) : 250=41.67%, 500=41.67%, 1000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=8.23%, ctx=151, 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=144237: Thu Sep 10 20:24:27 2026 read: IOPS=1, BW=1133KiB/s (1161kB/s)(6144KiB/5421msec) clat (usec): min=315, max=273509, avg=123287.60, stdev=135622.20 lat (usec): min=315, max=273510, avg=123288.63, stdev=135622.35 clat percentiles (usec): | 1.00th=[ 314], 5.00th=[ 314], 10.00th=[ 314], 20.00th=[ 412], | 30.00th=[ 412], 40.00th=[ 469], 50.00th=[ 469], 60.00th=[221250], | 70.00th=[244319], 80.00th=[244319], 90.00th=[274727], 95.00th=[274727], | 99.00th=[274727], 99.50th=[274727], 99.90th=[274727], 99.95th=[274727], | 99.99th=[274727] bw ( KiB/s): min= 2011, max= 4087, per=100.00%, avg=3350.33, stdev=1161.83, samples=3 iops : min= 1, max= 3, avg= 2.33, stdev= 1.15, samples=3 write: IOPS=1, BW=1133KiB/s (1161kB/s)(6144KiB/5421msec); 0 zone resets clat (msec): min=114, max=3159, avg=754.72, stdev=1187.38 lat (msec): min=114, max=3159, avg=754.85, stdev=1187.35 clat percentiles (msec): | 1.00th=[ 114], 5.00th=[ 114], 10.00th=[ 114], 20.00th=[ 155], | 30.00th=[ 155], 40.00th=[ 220], 50.00th=[ 220], 60.00th=[ 363], | 70.00th=[ 518], 80.00th=[ 518], 90.00th=[ 3171], 95.00th=[ 3171], | 99.00th=[ 3171], 99.50th=[ 3171], 99.90th=[ 3171], 99.95th=[ 3171], | 99.99th=[ 3171] bw ( KiB/s): min= 2043, max= 4023, per=64.22%, avg=2764.00, stdev=939.73, samples=4 iops : min= 1, max= 3, avg= 2.00, stdev= 0.82, samples=4 lat (usec) : 500=25.00% lat (msec) : 250=41.67%, 500=16.67%, 750=8.33%, >=2000=8.33% cpu : usr=0.04%, sys=6.99%, ctx=118, 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=144238: Thu Sep 10 20:24:27 2026 read: IOPS=0, BW=1014KiB/s (1039kB/s)(5120KiB/5047msec) clat (usec): min=497, max=188118, avg=108123.36, stdev=88554.99 lat (usec): min=499, max=188120, avg=108124.67, stdev=88555.16 clat percentiles (usec): | 1.00th=[ 498], 5.00th=[ 498], 10.00th=[ 498], 20.00th=[ 498], | 30.00th=[ 24511], 40.00th=[ 24511], 50.00th=[154141], 60.00th=[154141], | 70.00th=[173016], 80.00th=[173016], 90.00th=[187696], 95.00th=[187696], | 99.00th=[187696], 99.50th=[187696], 99.90th=[187696], 99.95th=[187696], | 99.99th=[187696] bw ( KiB/s): min= 1976, max= 6131, per=100.00%, avg=4053.50, stdev=2938.03, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 write: IOPS=1, BW=1420KiB/s (1454kB/s)(7168KiB/5047msec); 0 zone resets clat (msec): min=176, max=3185, avg=633.55, stdev=1125.72 lat (msec): min=176, max=3189, avg=634.18, stdev=1127.17 clat percentiles (msec): | 1.00th=[ 176], 5.00th=[ 176], 10.00th=[ 176], 20.00th=[ 178], | 30.00th=[ 184], 40.00th=[ 184], 50.00th=[ 234], 60.00th=[ 234], | 70.00th=[ 234], 80.00th=[ 245], 90.00th=[ 3171], 95.00th=[ 3171], | 99.00th=[ 3171], 99.50th=[ 3171], 99.90th=[ 3171], 99.95th=[ 3171], | 99.99th=[ 3171] bw ( KiB/s): min= 1440, max= 4096, per=67.37%, avg=2899.75, stdev=1393.41, samples=4 iops : min= 1, max= 4, avg= 2.25, stdev= 1.50, samples=4 lat (usec) : 500=8.33% lat (msec) : 50=8.33%, 250=75.00%, >=2000=8.33% cpu : usr=0.00%, sys=6.70%, ctx=124, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=5,7,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=3075KiB/s (3148kB/s), 307KiB/s-1299KiB/s (315kB/s-1331kB/s), io=20.0MiB (20.0MB), run=5047-6661msec WRITE: bw=4304KiB/s (4408kB/s), 928KiB/s-1537KiB/s (950kB/s-1574kB/s), io=28.0MiB (29.4MB), run=5047-6661msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144239: Thu Sep 10 20:24:27 2026 read: IOPS=1, BW=1043KiB/s (1068kB/s)(7168KiB/6873msec) clat (msec): min=57, max=2582, avg=772.72, stdev=1005.12 lat (msec): min=57, max=2582, avg=772.72, stdev=1005.12 clat percentiles (msec): | 1.00th=[ 58], 5.00th=[ 58], 10.00th=[ 58], 20.00th=[ 64], | 30.00th=[ 129], 40.00th=[ 129], 50.00th=[ 376], 60.00th=[ 397], | 70.00th=[ 397], 80.00th=[ 1804], 90.00th=[ 2567], 95.00th=[ 2567], | 99.00th=[ 2567], 99.50th=[ 2567], 99.90th=[ 2567], 99.95th=[ 2567], | 99.99th=[ 2567] bw ( KiB/s): min= 2003, max= 3930, per=82.38%, avg=2405.40, stdev=852.45, samples=5 iops : min= 1, max= 3, avg= 1.60, stdev= 0.89, samples=5 write: IOPS=0, BW=745KiB/s (763kB/s)(5120KiB/6873msec); 0 zone resets clat (msec): min=136, max=371, avg=234.64, stdev=98.15 lat (msec): min=136, max=371, avg=234.74, stdev=98.12 clat percentiles (msec): | 1.00th=[ 138], 5.00th=[ 138], 10.00th=[ 138], 20.00th=[ 138], | 30.00th=[ 155], 40.00th=[ 155], 50.00th=[ 218], 60.00th=[ 218], | 70.00th=[ 296], 80.00th=[ 296], 90.00th=[ 372], 95.00th=[ 372], | 99.00th=[ 372], 99.50th=[ 372], 99.90th=[ 372], 99.95th=[ 372], | 99.99th=[ 372] bw ( KiB/s): min= 1965, max= 6144, per=82.82%, avg=3385.67, stdev=2389.15, samples=3 iops : min= 1, max= 6, avg= 3.00, stdev= 2.65, samples=3 lat (msec) : 100=16.67%, 250=33.33%, 500=33.33%, 2000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=2.15%, ctx=78, 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=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=144240: Thu Sep 10 20:24:27 2026 read: IOPS=0, BW=298KiB/s (305kB/s)(2048KiB/6877msec) clat (msec): min=109, max=276, avg=192.78, stdev=118.38 lat (msec): min=109, max=276, avg=192.78, stdev=118.38 clat percentiles (msec): | 1.00th=[ 110], 5.00th=[ 110], 10.00th=[ 110], 20.00th=[ 110], | 30.00th=[ 110], 40.00th=[ 110], 50.00th=[ 110], 60.00th=[ 275], | 70.00th=[ 275], 80.00th=[ 275], 90.00th=[ 275], 95.00th=[ 275], | 99.00th=[ 275], 99.50th=[ 275], 99.90th=[ 275], 99.95th=[ 275], | 99.99th=[ 275] bw ( KiB/s): min= 1505, max= 1965, per=59.42%, avg=1735.00, stdev=325.27, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1489KiB/s (1525kB/s)(10.0MiB/6877msec); 0 zone resets clat (msec): min=76, max=3585, avg=611.66, stdev=1074.29 lat (msec): min=76, max=3586, avg=611.76, stdev=1074.29 clat percentiles (msec): | 1.00th=[ 78], 5.00th=[ 78], 10.00th=[ 78], 20.00th=[ 94], | 30.00th=[ 123], 40.00th=[ 182], 50.00th=[ 207], 60.00th=[ 249], | 70.00th=[ 330], 80.00th=[ 334], 90.00th=[ 944], 95.00th=[ 3574], | 99.00th=[ 3574], 99.50th=[ 3574], 99.90th=[ 3574], 99.95th=[ 3574], | 99.99th=[ 3574] bw ( KiB/s): min= 1965, max= 6144, per=79.37%, avg=3244.60, stdev=1858.92, samples=5 iops : min= 1, max= 6, avg= 2.60, stdev= 2.30, samples=5 lat (msec) : 100=16.67%, 250=41.67%, 500=25.00%, 1000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=2.76%, ctx=96, 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=144241: Thu Sep 10 20:24:27 2026 read: IOPS=0, BW=911KiB/s (933kB/s)(6144KiB/6743msec) clat (msec): min=77, max=505, avg=227.13, stdev=145.94 lat (msec): min=77, max=505, avg=227.13, stdev=145.94 clat percentiles (msec): | 1.00th=[ 79], 5.00th=[ 79], 10.00th=[ 79], 20.00th=[ 167], | 30.00th=[ 167], 40.00th=[ 182], 50.00th=[ 182], 60.00th=[ 192], | 70.00th=[ 239], 80.00th=[ 239], 90.00th=[ 506], 95.00th=[ 506], | 99.00th=[ 506], 99.50th=[ 506], 99.90th=[ 506], 99.95th=[ 506], | 99.99th=[ 506] bw ( KiB/s): min= 2015, max= 3930, per=91.24%, avg=2664.33, stdev=1096.22, samples=3 iops : min= 1, max= 3, avg= 2.00, stdev= 1.00, samples=3 write: IOPS=0, BW=911KiB/s (933kB/s)(6144KiB/6743msec); 0 zone resets clat (msec): min=105, max=3725, avg=832.43, stdev=1420.99 lat (msec): min=105, max=3725, avg=832.53, stdev=1421.01 clat percentiles (msec): | 1.00th=[ 106], 5.00th=[ 106], 10.00th=[ 106], 20.00th=[ 176], | 30.00th=[ 176], 40.00th=[ 271], 50.00th=[ 271], 60.00th=[ 330], | 70.00th=[ 393], 80.00th=[ 393], 90.00th=[ 3742], 95.00th=[ 3742], | 99.00th=[ 3742], 99.50th=[ 3742], 99.90th=[ 3742], 99.95th=[ 3742], | 99.99th=[ 3742] bw ( KiB/s): min= 2003, max= 4087, per=66.36%, avg=2712.67, stdev=1190.42, samples=3 iops : min= 1, max= 3, avg= 2.00, stdev= 1.00, samples=3 lat (msec) : 100=8.33%, 250=50.00%, 500=25.00%, 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=2.58%, ctx=79, 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=144242: Thu Sep 10 20:24:27 2026 read: IOPS=0, BW=730KiB/s (748kB/s)(5120KiB/7012msec) clat (msec): min=66, max=265, avg=128.67, stdev=78.61 lat (msec): min=66, max=265, avg=128.67, stdev=78.61 clat percentiles (msec): | 1.00th=[ 66], 5.00th=[ 66], 10.00th=[ 66], 20.00th=[ 66], | 30.00th=[ 96], 40.00th=[ 96], 50.00th=[ 99], 60.00th=[ 99], | 70.00th=[ 118], 80.00th=[ 118], 90.00th=[ 266], 95.00th=[ 266], | 99.00th=[ 266], 99.50th=[ 266], 99.90th=[ 266], 99.95th=[ 266], | 99.99th=[ 266] bw ( KiB/s): min= 2048, max= 5896, per=100.00%, avg=3972.00, stdev=2720.95, samples=2 iops : min= 2, max= 5, avg= 3.50, stdev= 2.12, samples=2 write: IOPS=0, BW=1022KiB/s (1047kB/s)(7168KiB/7012msec); 0 zone resets clat (msec): min=84, max=3597, avg=901.44, stdev=1223.71 lat (msec): min=84, max=3597, avg=901.52, stdev=1223.70 clat percentiles (msec): | 1.00th=[ 85], 5.00th=[ 85], 10.00th=[ 85], 20.00th=[ 129], | 30.00th=[ 351], 40.00th=[ 351], 50.00th=[ 567], 60.00th=[ 726], | 70.00th=[ 726], 80.00th=[ 860], 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= 2003, max= 2048, per=49.69%, avg=2031.40, stdev=20.98, samples=5 iops : min= 1, max= 2, avg= 1.40, stdev= 0.55, samples=5 lat (msec) : 100=33.33%, 250=16.67%, 500=16.67%, 750=16.67%, 1000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=2.51%, ctx=79, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=5,7,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=2921KiB/s (2991kB/s), 298KiB/s-1043KiB/s (305kB/s-1068kB/s), io=20.0MiB (20.0MB), run=6743-7012msec WRITE: bw=4089KiB/s (4187kB/s), 745KiB/s-1489KiB/s (763kB/s-1525kB/s), io=28.0MiB (29.4MB), run=6743-7012msec 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=144255: Thu Sep 10 20:24:41 2026 read: IOPS=1, BW=4470KiB/s (4577kB/s)(12.0MiB/2749msec) clat (msec): min=823, max=983, avg=897.27, stdev=80.40 lat (msec): min=823, max=983, avg=897.27, stdev=80.40 clat percentiles (msec): | 1.00th=[ 827], 5.00th=[ 827], 10.00th=[ 827], 20.00th=[ 827], | 30.00th=[ 827], 40.00th=[ 885], 50.00th=[ 885], 60.00th=[ 885], | 70.00th=[ 986], 80.00th=[ 986], 90.00th=[ 986], 95.00th=[ 986], | 99.00th=[ 986], 99.50th=[ 986], 99.90th=[ 986], 99.95th=[ 986], | 99.99th=[ 986] bw ( KiB/s): min= 8015, max= 8126, per=100.00%, avg=8070.50, stdev=78.49, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 1000=100.00% cpu : usr=0.00%, sys=11.03%, ctx=291, 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=144256: Thu Sep 10 20:24:41 2026 read: IOPS=0, BW=1712KiB/s (1753kB/s)(4096KiB/2392msec) clat (nsec): min=699745k, max=699745k, avg=699745241.00, stdev= 0.00 lat (nsec): min=699748k, max=699748k, avg=699747629.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 701], 5.00th=[ 701], 10.00th=[ 701], 20.00th=[ 701], | 30.00th=[ 701], 40.00th=[ 701], 50.00th=[ 701], 60.00th=[ 701], | 70.00th=[ 701], 80.00th=[ 701], 90.00th=[ 701], 95.00th=[ 701], | 99.00th=[ 701], 99.50th=[ 701], 99.90th=[ 701], 99.95th=[ 701], | 99.99th=[ 701] bw ( KiB/s): min= 8015, max= 8015, per=100.00%, avg=8015.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=3425KiB/s (3507kB/s)(8192KiB/2392msec); 0 zone resets clat (msec): min=723, max=907, avg=815.85, stdev=130.24 lat (msec): min=729, max=908, avg=819.03, stdev=126.20 clat percentiles (msec): | 1.00th=[ 726], 5.00th=[ 726], 10.00th=[ 726], 20.00th=[ 726], | 30.00th=[ 726], 40.00th=[ 726], 50.00th=[ 726], 60.00th=[ 911], | 70.00th=[ 911], 80.00th=[ 911], 90.00th=[ 911], 95.00th=[ 911], | 99.00th=[ 911], 99.50th=[ 911], 99.90th=[ 911], 99.95th=[ 911], | 99.99th=[ 911] bw ( KiB/s): min= 8126, max= 8126, per=82.91%, avg=8126.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 750=66.67%, 1000=33.33% cpu : usr=0.00%, sys=5.31%, ctx=84, 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=144257: Thu Sep 10 20:24:41 2026 write: IOPS=0, BW=3676KiB/s (3764kB/s)(12.0MiB/3343msec); 0 zone resets clat (msec): min=420, max=1873, avg=1095.81, stdev=732.05 lat (msec): min=421, max=1874, avg=1096.25, stdev=732.19 clat percentiles (msec): | 1.00th=[ 422], 5.00th=[ 422], 10.00th=[ 422], 20.00th=[ 422], | 30.00th=[ 422], 40.00th=[ 995], 50.00th=[ 995], 60.00th=[ 995], | 70.00th=[ 1871], 80.00th=[ 1871], 90.00th=[ 1871], 95.00th=[ 1871], | 99.00th=[ 1871], 99.50th=[ 1871], 99.90th=[ 1871], 99.95th=[ 1871], | 99.99th=[ 1871] bw ( KiB/s): min= 8062, max= 8126, per=82.58%, avg=8094.00, stdev=45.25, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=5.06%, ctx=56, 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=144258: Thu Sep 10 20:24:41 2026 write: IOPS=1, BW=4983KiB/s (5103kB/s)(12.0MiB/2466msec); 0 zone resets clat (msec): min=375, max=1332, avg=784.54, stdev=493.29 lat (msec): min=376, max=1335, avg=786.01, stdev=494.69 clat percentiles (msec): | 1.00th=[ 376], 5.00th=[ 376], 10.00th=[ 376], 20.00th=[ 376], | 30.00th=[ 376], 40.00th=[ 642], 50.00th=[ 642], 60.00th=[ 642], | 70.00th=[ 1334], 80.00th=[ 1334], 90.00th=[ 1334], 95.00th=[ 1334], | 99.00th=[ 1334], 99.50th=[ 1334], 99.90th=[ 1334], 99.95th=[ 1334], | 99.99th=[ 1334] bw ( KiB/s): min= 8015, max= 8078, per=82.10%, avg=8046.50, stdev=44.55, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 750=33.33%, 2000=33.33% cpu : usr=0.00%, sys=4.02%, ctx=47, 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=5960KiB/s (6103kB/s), 1712KiB/s-4470KiB/s (1753kB/s-4577kB/s), io=16.0MiB (16.8MB), run=2392-2749msec WRITE: bw=9802KiB/s (10.0MB/s), 3425KiB/s-4983KiB/s (3507kB/s-5103kB/s), io=32.0MiB (33.6MB), run=2392-3343msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144250: Thu Sep 10 20:24:42 2026 read: IOPS=1, BW=6931KiB/s (7097kB/s)(12.0MiB/1773msec) clat (msec): min=434, max=724, avg=543.32, stdev=157.77 lat (msec): min=434, max=724, avg=543.32, stdev=157.77 clat percentiles (msec): | 1.00th=[ 435], 5.00th=[ 435], 10.00th=[ 435], 20.00th=[ 435], | 30.00th=[ 435], 40.00th=[ 472], 50.00th=[ 472], 60.00th=[ 472], | 70.00th=[ 726], 80.00th=[ 726], 90.00th=[ 726], 95.00th=[ 726], | 99.00th=[ 726], 99.50th=[ 726], 99.90th=[ 726], 99.95th=[ 726], | 99.99th=[ 726] bw ( KiB/s): min=16094, max=16094, per=100.00%, avg=16094.00, stdev= 0.00, samples=1 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=1 lat (msec) : 500=66.67%, 750=33.33% cpu : usr=0.06%, sys=7.11%, ctx=89, 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=144252: Thu Sep 10 20:24:42 2026 read: IOPS=0, BW=1231KiB/s (1260kB/s)(4096KiB/3328msec) clat (nsec): min=1102.7M, max=1102.7M, avg=1102714682.00, stdev= 0.00 lat (nsec): min=1102.7M, max=1102.7M, avg=1102717592.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1099], 5.00th=[ 1099], 10.00th=[ 1099], 20.00th=[ 1099], | 30.00th=[ 1099], 40.00th=[ 1099], 50.00th=[ 1099], 60.00th=[ 1099], | 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=100.00%, avg=8175.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2462KiB/s (2521kB/s)(8192KiB/3328msec); 0 zone resets clat (msec): min=995, max=1140, avg=1067.96, stdev=103.11 lat (msec): min=995, max=1141, avg=1068.33, stdev=103.33 clat percentiles (msec): | 1.00th=[ 995], 5.00th=[ 995], 10.00th=[ 995], 20.00th=[ 995], | 30.00th=[ 995], 40.00th=[ 995], 50.00th=[ 995], 60.00th=[ 1150], | 70.00th=[ 1150], 80.00th=[ 1150], 90.00th=[ 1150], 95.00th=[ 1150], | 99.00th=[ 1150], 99.50th=[ 1150], 99.90th=[ 1150], 99.95th=[ 1150], | 99.99th=[ 1150] bw ( KiB/s): min= 8062, max= 8062, per=91.80%, avg=8062.00, 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=3.07%, ctx=34, 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=144253: Thu Sep 10 20:24:42 2026 write: IOPS=0, BW=3293KiB/s (3373kB/s)(12.0MiB/3731msec); 0 zone resets clat (msec): min=289, max=2072, avg=1218.93, stdev=893.73 lat (msec): min=290, max=2072, avg=1219.67, stdev=893.78 clat percentiles (msec): | 1.00th=[ 292], 5.00th=[ 292], 10.00th=[ 292], 20.00th=[ 292], | 30.00th=[ 292], 40.00th=[ 1301], 50.00th=[ 1301], 60.00th=[ 1301], | 70.00th=[ 2072], 80.00th=[ 2072], 90.00th=[ 2072], 95.00th=[ 2072], | 99.00th=[ 2072], 99.50th=[ 2072], 99.90th=[ 2072], 99.95th=[ 2072], | 99.99th=[ 2072] bw ( KiB/s): min= 8126, max= 8143, per=92.63%, avg=8134.50, stdev=12.02, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=3.32%, ctx=45, 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=144254: Thu Sep 10 20:24:42 2026 write: IOPS=1, BW=4435KiB/s (4541kB/s)(12.0MiB/2771msec); 0 zone resets clat (msec): min=605, max=1030, avg=885.65, stdev=243.06 lat (msec): min=605, max=1030, avg=886.16, stdev=242.91 clat percentiles (msec): | 1.00th=[ 609], 5.00th=[ 609], 10.00th=[ 609], 20.00th=[ 609], | 30.00th=[ 609], 40.00th=[ 1020], 50.00th=[ 1020], 60.00th=[ 1020], | 70.00th=[ 1028], 80.00th=[ 1028], 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= 8094, max= 8175, per=92.63%, avg=8134.50, stdev=57.28, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=33.33%, 2000=66.67% cpu : usr=0.00%, sys=4.80%, ctx=147, majf=0, minf=9 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=4923KiB/s (5041kB/s), 1231KiB/s-6931KiB/s (1260kB/s-7097kB/s), io=16.0MiB (16.8MB), run=1773-3328msec WRITE: bw=8783KiB/s (8993kB/s), 2462KiB/s-4435KiB/s (2521kB/s-4541kB/s), io=32.0MiB (33.6MB), run=2771-3731msec