== sanity test 398b: DIO and buffer IO race ============== 10:51:10 (1790952670) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 7.44905 s, 6.8 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=179498: Fri Oct 2 10:53:35 2026 read: IOPS=12, BW=48.9KiB/s (50.1kB/s)(5992KiB/122493msec) clat (usec): min=34, max=1092.2k, avg=45519.88, stdev=41339.43 lat (usec): min=34, max=1092.2k, avg=45527.40, stdev=41342.12 clat percentiles (usec): | 1.00th=[ 57], 5.00th=[ 10552], 10.00th=[ 16319], | 20.00th=[ 21365], 30.00th=[ 26346], 40.00th=[ 31327], | 50.00th=[ 38011], 60.00th=[ 44303], 70.00th=[ 53216], | 80.00th=[ 65274], 90.00th=[ 82314], 95.00th=[ 101188], | 99.00th=[ 156238], 99.50th=[ 168821], 99.90th=[ 299893], | 99.95th=[1098908], 99.99th=[1098908] bw ( KiB/s): min= 7, max= 136, per=25.18%, avg=48.84, stdev=21.37, samples=238 iops : min= 1, max= 34, avg=11.56, stdev= 5.38, samples=238 write: IOPS=12, BW=51.4KiB/s (52.6kB/s)(6296KiB/122493msec); 0 zone resets clat (usec): min=972, max=279234, avg=34217.65, stdev=36638.28 lat (usec): min=973, max=279236, avg=34221.23, stdev=36637.59 clat percentiles (usec): | 1.00th=[ 1106], 5.00th=[ 1254], 10.00th=[ 1549], 20.00th=[ 3458], | 30.00th=[ 7373], 40.00th=[ 14877], 50.00th=[ 22938], 60.00th=[ 32113], | 70.00th=[ 43254], 80.00th=[ 58459], 90.00th=[ 85459], 95.00th=[104334], | 99.00th=[160433], 99.50th=[193987], 99.90th=[254804], 99.95th=[278922], | 99.99th=[278922] bw ( KiB/s): min= 7, max= 106, per=25.37%, avg=51.50, stdev=22.53, samples=238 iops : min= 1, max= 26, avg=12.22, stdev= 5.67, samples=238 lat (usec) : 50=0.16%, 100=1.56%, 250=0.13%, 500=0.07%, 750=0.07% lat (usec) : 1000=0.07% lat (msec) : 2=6.74%, 4=4.43%, 10=6.54%, 20=11.98%, 50=38.70% lat (msec) : 100=23.99%, 250=5.40%, 500=0.13%, 2000=0.03% cpu : usr=0.08%, sys=5.24%, ctx=6462, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1498,1574,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179499: Fri Oct 2 10:53:35 2026 read: IOPS=12, BW=48.2KiB/s (49.3kB/s)(5940KiB/123260msec) clat (usec): min=38, max=1008.6k, avg=45310.36, stdev=39861.90 lat (usec): min=38, max=1008.6k, avg=45313.02, stdev=39862.53 clat percentiles (usec): | 1.00th=[ 53], 5.00th=[ 7111], 10.00th=[ 15664], | 20.00th=[ 21365], 30.00th=[ 26346], 40.00th=[ 32637], | 50.00th=[ 38536], 60.00th=[ 44303], 70.00th=[ 52691], | 80.00th=[ 63701], 90.00th=[ 82314], 95.00th=[ 100140], | 99.00th=[ 162530], 99.50th=[ 189793], 99.90th=[ 258999], | 99.95th=[1010828], 99.99th=[1010828] bw ( KiB/s): min= 7, max= 111, per=24.79%, avg=48.09, stdev=21.02, samples=240 iops : min= 1, max= 27, avg=11.37, stdev= 5.29, samples=240 write: IOPS=12, BW=51.5KiB/s (52.7kB/s)(6348KiB/123260msec); 0 zone resets clat (usec): min=775, max=379005, avg=34962.66, stdev=38257.88 lat (usec): min=775, max=379007, avg=34979.30, stdev=38271.53 clat percentiles (usec): | 1.00th=[ 1074], 5.00th=[ 1221], 10.00th=[ 1319], 20.00th=[ 3064], | 30.00th=[ 6652], 40.00th=[ 14615], 50.00th=[ 24511], 60.00th=[ 35390], | 70.00th=[ 45351], 80.00th=[ 58983], 90.00th=[ 84411], 95.00th=[109577], | 99.00th=[170918], 99.50th=[206570], 99.90th=[278922], 99.95th=[379585], | 99.99th=[379585] bw ( KiB/s): min= 7, max= 189, per=25.41%, avg=51.57, stdev=25.56, samples=239 iops : min= 1, max= 47, avg=12.25, stdev= 6.45, samples=239 lat (usec) : 50=0.33%, 100=1.63%, 250=0.10%, 500=0.10%, 750=0.03% lat (usec) : 1000=0.36% lat (msec) : 2=7.65%, 4=4.30%, 10=6.48%, 20=10.81%, 50=38.54% lat (msec) : 100=23.80%, 250=5.73%, 500=0.13%, 2000=0.03% cpu : usr=0.09%, sys=5.34%, ctx=6510, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1485,1587,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179500: Fri Oct 2 10:53:35 2026 read: IOPS=12, BW=48.8KiB/s (49.9kB/s)(6028KiB/123605msec) clat (usec): min=34, max=216219, avg=45083.18, stdev=31201.09 lat (usec): min=34, max=216220, avg=45096.90, stdev=31202.11 clat percentiles (usec): | 1.00th=[ 56], 5.00th=[ 8979], 10.00th=[ 16188], 20.00th=[ 21103], | 30.00th=[ 26346], 40.00th=[ 32375], 50.00th=[ 38011], 60.00th=[ 44827], | 70.00th=[ 52691], 80.00th=[ 64750], 90.00th=[ 84411], 95.00th=[104334], | 99.00th=[156238], 99.50th=[187696], 99.90th=[212861], 99.95th=[217056], | 99.99th=[217056] bw ( KiB/s): min= 7, max= 110, per=25.41%, avg=49.30, stdev=20.25, samples=239 iops : min= 1, max= 27, avg=11.68, stdev= 5.11, samples=239 write: IOPS=12, BW=50.6KiB/s (51.9kB/s)(6260KiB/123605msec); 0 zone resets clat (usec): min=864, max=1045.4k, avg=35272.82, stdev=44191.82 lat (usec): min=866, max=1045.4k, avg=35275.34, stdev=44191.72 clat percentiles (usec): | 1.00th=[ 1123], 5.00th=[ 1270], 10.00th=[ 1418], | 20.00th=[ 3261], 30.00th=[ 7767], 40.00th=[ 15795], | 50.00th=[ 25297], 60.00th=[ 34341], 70.00th=[ 44303], | 80.00th=[ 60031], 90.00th=[ 80217], 95.00th=[ 107480], | 99.00th=[ 164627], 99.50th=[ 193987], 99.90th=[ 263193], | 99.95th=[1044382], 99.99th=[1044382] bw ( KiB/s): min= 7, max= 126, per=25.08%, avg=50.92, stdev=22.64, samples=240 iops : min= 1, max= 31, avg=12.08, stdev= 5.70, samples=240 lat (usec) : 50=0.29%, 100=1.79%, 250=0.03%, 500=0.03%, 750=0.03% lat (usec) : 1000=0.03% lat (msec) : 2=7.42%, 4=3.84%, 10=5.96%, 20=11.52%, 50=39.36% lat (msec) : 100=23.63%, 250=5.99%, 500=0.03%, 2000=0.03% cpu : usr=0.08%, sys=5.36%, ctx=6558, 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=179501: Fri Oct 2 10:53:35 2026 read: IOPS=12, BW=49.7KiB/s (50.9kB/s)(6052KiB/121686msec) clat (usec): min=33, max=509967, avg=44176.10, stdev=32732.96 lat (usec): min=33, max=509968, avg=44177.59, stdev=32732.98 clat percentiles (usec): | 1.00th=[ 53], 5.00th=[ 578], 10.00th=[ 15008], 20.00th=[ 21103], | 30.00th=[ 26608], 40.00th=[ 31589], 50.00th=[ 38011], 60.00th=[ 44827], | 70.00th=[ 53216], 80.00th=[ 63177], 90.00th=[ 81265], 95.00th=[ 95945], | 99.00th=[149947], 99.50th=[202376], 99.90th=[308282], 99.95th=[509608], | 99.99th=[509608] bw ( KiB/s): min= 7, max= 126, per=25.75%, avg=49.95, stdev=19.53, samples=236 iops : min= 1, max= 31, avg=11.83, stdev= 4.93, samples=236 write: IOPS=12, BW=51.2KiB/s (52.5kB/s)(6236KiB/121686msec); 0 zone resets clat (usec): min=826, max=1048.7k, avg=34860.35, stdev=43934.46 lat (usec): min=828, max=1048.7k, avg=34862.77, stdev=43934.45 clat percentiles (usec): | 1.00th=[ 1106], 5.00th=[ 1254], 10.00th=[ 1418], | 20.00th=[ 3392], 30.00th=[ 7504], 40.00th=[ 14877], | 50.00th=[ 23987], 60.00th=[ 33424], 70.00th=[ 45876], | 80.00th=[ 59507], 90.00th=[ 82314], 95.00th=[ 103285], | 99.00th=[ 152044], 99.50th=[ 177210], 99.90th=[ 265290], | 99.95th=[1052771], 99.99th=[1052771] bw ( KiB/s): min= 7, max= 141, per=25.22%, avg=51.19, stdev=22.97, samples=237 iops : min= 1, max= 35, avg=12.16, stdev= 5.79, samples=237 lat (usec) : 50=0.33%, 100=1.99%, 250=0.10%, 500=0.03%, 750=0.13% lat (usec) : 1000=0.13% lat (msec) : 2=7.00%, 4=4.52%, 10=6.09%, 20=11.20%, 50=39.03% lat (msec) : 100=24.74%, 250=4.56%, 500=0.10%, 750=0.03%, 2000=0.03% cpu : usr=0.08%, sys=5.27%, ctx=6469, majf=0, minf=17 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1513,1559,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=194KiB/s (199kB/s), 48.2KiB/s-49.7KiB/s (49.3kB/s-50.9kB/s), io=23.4MiB (24.6MB), run=121686-123605msec WRITE: bw=203KiB/s (208kB/s), 50.6KiB/s-51.5KiB/s (51.9kB/s-52.7kB/s), io=24.6MiB (25.7MB), run=121686-123605msec fio: pid=179495, err=5/file:backend.c:481, func=full resid, error=Input/output error rand-rw: (groupid=0, jobs=1): err= 0: pid=179494: Fri Oct 2 10:54:15 2026 read: IOPS=9, BW=36.6KiB/s (37.5kB/s)(5992KiB/163498msec) clat (msec): min=5, max=1088, avg=43.25, stdev=50.14 lat (msec): min=5, max=1088, avg=43.26, stdev=50.14 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 16], | 30.00th=[ 20], 40.00th=[ 23], 50.00th=[ 29], 60.00th=[ 35], | 70.00th=[ 45], 80.00th=[ 60], 90.00th=[ 90], 95.00th=[ 128], | 99.00th=[ 230], 99.50th=[ 271], 99.90th=[ 342], 99.95th=[ 1083], | 99.99th=[ 1083] bw ( KiB/s): min= 7, max= 151, per=25.79%, avg=37.39, stdev=27.30, samples=311 iops : min= 1, max= 37, avg= 8.67, stdev= 6.86, samples=311 write: IOPS=9, BW=38.5KiB/s (39.4kB/s)(6296KiB/163498msec); 0 zone resets clat (msec): min=11, max=501, avg=62.41, stdev=45.83 lat (msec): min=11, max=501, avg=62.42, stdev=45.83 clat percentiles (msec): | 1.00th=[ 14], 5.00th=[ 19], 10.00th=[ 23], 20.00th=[ 28], | 30.00th=[ 34], 40.00th=[ 41], 50.00th=[ 48], 60.00th=[ 59], | 70.00th=[ 73], 80.00th=[ 92], 90.00th=[ 125], 95.00th=[ 150], | 99.00th=[ 222], 99.50th=[ 271], 99.90th=[ 393], 99.95th=[ 502], | 99.99th=[ 502] bw ( KiB/s): min= 7, max= 128, per=25.34%, avg=38.52, stdev=24.46, samples=317 iops : min= 1, max= 32, avg= 8.95, stdev= 6.16, samples=317 lat (msec) : 10=2.90%, 20=16.70%, 50=43.59%, 100=24.48%, 250=11.72% lat (msec) : 500=0.55%, 750=0.03%, 2000=0.03% cpu : usr=0.07%, sys=1.73%, ctx=4818, 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=179495: Fri Oct 2 10:54:15 2026 read: IOPS=9, BW=36.3KiB/s (37.2kB/s)(5772KiB/159071msec) clat (msec): min=5, max=1026, avg=42.97, stdev=48.91 lat (msec): min=5, max=1026, avg=42.97, stdev=48.91 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 16], | 30.00th=[ 20], 40.00th=[ 23], 50.00th=[ 28], 60.00th=[ 35], | 70.00th=[ 44], 80.00th=[ 61], 90.00th=[ 92], 95.00th=[ 128], | 99.00th=[ 205], 99.50th=[ 264], 99.90th=[ 401], 99.95th=[ 1028], | 99.99th=[ 1028] bw ( KiB/s): min= 7, max= 150, per=26.16%, avg=37.94, stdev=25.11, samples=296 iops : min= 1, max= 37, avg= 8.80, stdev= 6.31, samples=296 write: IOPS=9, BW=38.4KiB/s (39.3kB/s)(6104KiB/159071msec); 0 zone resets clat (msec): min=8, max=412, avg=63.33, stdev=47.65 lat (msec): min=8, max=412, avg=63.33, stdev=47.65 clat percentiles (msec): | 1.00th=[ 15], 5.00th=[ 19], 10.00th=[ 23], 20.00th=[ 29], | 30.00th=[ 34], 40.00th=[ 41], 50.00th=[ 50], 60.00th=[ 59], | 70.00th=[ 71], 80.00th=[ 90], 90.00th=[ 123], 95.00th=[ 159], | 99.00th=[ 241], 99.50th=[ 288], 99.90th=[ 401], 99.95th=[ 414], | 99.99th=[ 414] bw ( KiB/s): min= 7, max= 152, per=25.22%, avg=38.34, stdev=24.95, samples=310 iops : min= 1, max= 38, avg= 8.91, stdev= 6.28, samples=310 lat (msec) : 10=2.93%, 20=15.93%, 50=43.30%, 100=25.59%, 250=11.55% lat (msec) : 500=0.64%, 2000=0.03% cpu : usr=0.05%, sys=1.80%, ctx=4572, majf=0, minf=20 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=1444,1526,0,0 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=179496: Fri Oct 2 10:54:15 2026 read: IOPS=9, BW=36.9KiB/s (37.8kB/s)(6028KiB/163504msec) clat (msec): min=5, max=367, avg=43.14, stdev=41.79 lat (msec): min=5, max=367, avg=43.14, stdev=41.79 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 16], | 30.00th=[ 20], 40.00th=[ 24], 50.00th=[ 29], 60.00th=[ 36], | 70.00th=[ 44], 80.00th=[ 63], 90.00th=[ 97], 95.00th=[ 128], | 99.00th=[ 194], 99.50th=[ 264], 99.90th=[ 317], 99.95th=[ 368], | 99.99th=[ 368] bw ( KiB/s): min= 7, max= 133, per=25.85%, avg=37.48, stdev=24.94, samples=312 iops : min= 1, max= 33, avg= 8.70, stdev= 6.29, samples=312 write: IOPS=9, BW=38.3KiB/s (39.2kB/s)(6260KiB/163504msec); 0 zone resets clat (msec): min=9, max=1039, avg=62.65, stdev=53.11 lat (msec): min=9, max=1039, avg=62.65, stdev=53.11 clat percentiles (msec): | 1.00th=[ 14], 5.00th=[ 20], 10.00th=[ 23], 20.00th=[ 28], | 30.00th=[ 34], 40.00th=[ 40], 50.00th=[ 47], 60.00th=[ 57], | 70.00th=[ 70], 80.00th=[ 89], 90.00th=[ 124], 95.00th=[ 153], | 99.00th=[ 226], 99.50th=[ 305], 99.90th=[ 514], 99.95th=[ 1036], | 99.99th=[ 1036] bw ( KiB/s): min= 7, max= 160, per=25.58%, avg=38.88, stdev=25.18, samples=312 iops : min= 1, max= 40, avg= 9.04, stdev= 6.35, samples=312 lat (msec) : 10=2.99%, 20=16.05%, 50=44.56%, 100=23.83%, 250=11.88% lat (msec) : 500=0.62%, 750=0.03%, 2000=0.03% cpu : usr=0.07%, sys=1.83%, ctx=4873, 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=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=179497: Fri Oct 2 10:54:15 2026 read: IOPS=9, BW=37.3KiB/s (38.2kB/s)(6052KiB/162221msec) clat (msec): min=5, max=311, avg=41.09, stdev=39.71 lat (msec): min=5, max=311, avg=41.10, stdev=39.71 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 19], 40.00th=[ 23], 50.00th=[ 27], 60.00th=[ 35], | 70.00th=[ 44], 80.00th=[ 60], 90.00th=[ 86], 95.00th=[ 124], | 99.00th=[ 201], 99.50th=[ 239], 99.90th=[ 305], 99.95th=[ 313], | 99.99th=[ 313] bw ( KiB/s): min= 7, max= 135, per=26.28%, avg=38.11, stdev=26.32, samples=309 iops : min= 1, max= 33, avg= 8.84, stdev= 6.63, samples=309 write: IOPS=9, BW=38.4KiB/s (39.4kB/s)(6236KiB/162221msec); 0 zone resets clat (msec): min=8, max=1048, avg=63.91, stdev=52.64 lat (msec): min=8, max=1048, avg=63.91, stdev=52.64 clat percentiles (msec): | 1.00th=[ 14], 5.00th=[ 20], 10.00th=[ 23], 20.00th=[ 29], | 30.00th=[ 34], 40.00th=[ 41], 50.00th=[ 49], 60.00th=[ 59], | 70.00th=[ 73], 80.00th=[ 93], 90.00th=[ 127], 95.00th=[ 155], | 99.00th=[ 228], 99.50th=[ 259], 99.90th=[ 439], 99.95th=[ 1045], | 99.99th=[ 1045] bw ( KiB/s): min= 7, max= 136, per=25.13%, avg=38.21, stdev=24.45, samples=317 iops : min= 1, max= 34, avg= 8.87, stdev= 6.16, samples=317 lat (msec) : 10=3.29%, 20=16.60%, 50=43.03%, 100=24.77%, 250=11.72% lat (msec) : 500=0.55%, 2000=0.03% cpu : usr=0.08%, sys=1.77%, ctx=4871, 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=146KiB/s (149kB/s), 36.3KiB/s-37.3KiB/s (37.2kB/s-38.2kB/s), io=23.3MiB (24.4MB), run=159071-163504msec WRITE: bw=152KiB/s (156kB/s), 38.3KiB/s-38.5KiB/s (39.2kB/s-39.4kB/s), io=24.3MiB (25.5MB), run=159071-163504msec 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=179542: Fri Oct 2 10:54:56 2026 read: IOPS=12, BW=206KiB/s (211kB/s)(5920KiB/28687msec) clat (usec): min=31, max=146599, avg=40375.84, stdev=26968.30 lat (usec): min=33, max=146600, avg=40377.41, stdev=26968.86 clat percentiles (usec): | 1.00th=[ 41], 5.00th=[ 58], 10.00th=[ 77], 20.00th=[ 19530], | 30.00th=[ 26608], 40.00th=[ 31589], 50.00th=[ 37487], 60.00th=[ 41681], | 70.00th=[ 50594], 80.00th=[ 62653], 90.00th=[ 74974], 95.00th=[ 94897], | 99.00th=[121111], 99.50th=[127402], 99.90th=[145753], 99.95th=[145753], | 99.99th=[145753] bw ( KiB/s): min= 92, max= 383, per=24.66%, avg=203.16, stdev=77.90, samples=56 iops : min= 5, max= 23, avg=11.95, stdev= 4.89, samples=56 write: IOPS=13, BW=222KiB/s (227kB/s)(6368KiB/28687msec); 0 zone resets clat (usec): min=1516, max=241333, avg=34441.12, stdev=32614.87 lat (usec): min=1516, max=241335, avg=34443.78, stdev=32615.20 clat percentiles (usec): | 1.00th=[ 1565], 5.00th=[ 1942], 10.00th=[ 3359], 20.00th=[ 6980], | 30.00th=[ 11600], 40.00th=[ 19530], 50.00th=[ 25035], 60.00th=[ 34341], | 70.00th=[ 42730], 80.00th=[ 55837], 90.00th=[ 78119], 95.00th=[106431], | 99.00th=[129500], 99.50th=[156238], 99.90th=[242222], 99.95th=[242222], | 99.99th=[242222] bw ( KiB/s): min= 63, max= 447, per=25.46%, avg=220.70, stdev=79.50, samples=56 iops : min= 3, max= 27, avg=13.05, stdev= 4.99, samples=56 lat (usec) : 50=0.91%, 100=4.43%, 250=0.13%, 500=0.13%, 1000=0.13% lat (msec) : 2=2.73%, 4=3.52%, 10=7.81%, 20=11.59%, 50=41.02% lat (msec) : 100=22.66%, 250=4.95% cpu : usr=0.10%, sys=6.01%, ctx=1624, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179543: Fri Oct 2 10:54:56 2026 read: IOPS=12, BW=201KiB/s (205kB/s)(5744KiB/28639msec) clat (usec): min=42, max=170395, avg=42126.16, stdev=26261.72 lat (usec): min=43, max=170396, avg=42129.26, stdev=26262.39 clat percentiles (usec): | 1.00th=[ 53], 5.00th=[ 66], 10.00th=[ 14222], 20.00th=[ 21627], | 30.00th=[ 27657], 40.00th=[ 33162], 50.00th=[ 38011], 60.00th=[ 43779], | 70.00th=[ 52691], 80.00th=[ 60556], 90.00th=[ 74974], 95.00th=[ 90702], | 99.00th=[115868], 99.50th=[147850], 99.90th=[170918], 99.95th=[170918], | 99.99th=[170918] bw ( KiB/s): min= 30, max= 411, per=24.29%, avg=200.14, stdev=87.16, samples=56 iops : min= 1, max= 25, avg=11.77, stdev= 5.45, samples=56 write: IOPS=14, BW=228KiB/s (234kB/s)(6544KiB/28639msec); 0 zone resets clat (usec): min=1319, max=175306, avg=32886.87, stdev=31785.52 lat (usec): min=1322, max=175308, avg=32888.87, stdev=31785.55 clat percentiles (usec): | 1.00th=[ 1598], 5.00th=[ 1926], 10.00th=[ 3064], 20.00th=[ 6587], | 30.00th=[ 10552], 40.00th=[ 16450], 50.00th=[ 22938], 60.00th=[ 30802], | 70.00th=[ 42730], 80.00th=[ 54789], 90.00th=[ 74974], 95.00th=[100140], | 99.00th=[139461], 99.50th=[156238], 99.90th=[175113], 99.95th=[175113], | 99.99th=[175113] bw ( KiB/s): min= 32, max= 506, per=26.27%, avg=227.77, stdev=98.16, samples=56 iops : min= 2, max= 31, avg=13.52, stdev= 6.13, samples=56 lat (usec) : 50=0.26%, 100=2.99%, 250=0.26%, 500=0.13% lat (msec) : 2=2.86%, 4=4.43%, 10=8.20%, 20=12.37%, 50=40.49% lat (msec) : 100=23.70%, 250=4.30% cpu : usr=0.07%, sys=6.09%, ctx=1730, 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=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=179544: Fri Oct 2 10:54:56 2026 read: IOPS=13, BW=215KiB/s (220kB/s)(6256KiB/29063msec) clat (usec): min=39, max=183556, avg=40624.77, stdev=26876.30 lat (usec): min=40, max=183557, avg=40626.41, stdev=26876.20 clat percentiles (usec): | 1.00th=[ 45], 5.00th=[ 61], 10.00th=[ 2089], 20.00th=[ 21365], | 30.00th=[ 26346], 40.00th=[ 32375], 50.00th=[ 38536], 60.00th=[ 42730], | 70.00th=[ 50070], 80.00th=[ 58459], 90.00th=[ 71828], 95.00th=[ 90702], | 99.00th=[123208], 99.50th=[149947], 99.90th=[183501], 99.95th=[183501], | 99.99th=[183501] bw ( KiB/s): min= 58, max= 442, per=26.19%, avg=215.82, stdev=81.35, samples=57 iops : min= 3, max= 27, avg=12.74, stdev= 5.09, samples=57 write: IOPS=12, BW=208KiB/s (213kB/s)(6032KiB/29063msec); 0 zone resets clat (usec): min=1008, max=195231, avg=34728.68, stdev=33863.17 lat (usec): min=1010, max=195232, avg=34730.67, stdev=33863.12 clat percentiles (usec): | 1.00th=[ 1450], 5.00th=[ 1844], 10.00th=[ 2540], 20.00th=[ 4293], | 30.00th=[ 8848], 40.00th=[ 16909], 50.00th=[ 25822], 60.00th=[ 35390], | 70.00th=[ 44827], 80.00th=[ 60556], 90.00th=[ 80217], 95.00th=[100140], | 99.00th=[152044], 99.50th=[170918], 99.90th=[196084], 99.95th=[196084], | 99.99th=[196084] bw ( KiB/s): min= 31, max= 413, per=23.75%, avg=205.93, stdev=82.61, samples=57 iops : min= 1, max= 25, avg=12.14, stdev= 5.22, samples=57 lat (usec) : 50=0.91%, 100=3.65%, 250=0.52% lat (msec) : 2=3.26%, 4=6.38%, 10=6.25%, 20=10.16%, 50=40.49% lat (msec) : 100=24.09%, 250=4.30% cpu : usr=0.08%, sys=5.82%, ctx=1650, 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=179545: Fri Oct 2 10:54:56 2026 read: IOPS=13, BW=213KiB/s (218kB/s)(6032KiB/28293msec) clat (usec): min=35, max=129698, avg=40534.20, stdev=26038.98 lat (usec): min=37, max=129699, avg=40535.33, stdev=26039.01 clat percentiles (usec): | 1.00th=[ 40], 5.00th=[ 59], 10.00th=[ 70], 20.00th=[ 21365], | 30.00th=[ 27395], 40.00th=[ 32637], 50.00th=[ 39584], 60.00th=[ 43779], | 70.00th=[ 51119], 80.00th=[ 61080], 90.00th=[ 76022], 95.00th=[ 89654], | 99.00th=[115868], 99.50th=[119014], 99.90th=[129500], 99.95th=[129500], | 99.99th=[129500] bw ( KiB/s): min= 88, max= 477, per=25.69%, avg=211.69, stdev=78.18, samples=55 iops : min= 5, max= 29, avg=12.49, stdev= 4.88, samples=55 write: IOPS=13, BW=221KiB/s (226kB/s)(6256KiB/28293msec); 0 zone resets clat (usec): min=1434, max=162495, avg=33156.98, stdev=32087.78 lat (usec): min=1435, max=162497, avg=33166.10, stdev=32083.30 clat percentiles (usec): | 1.00th=[ 1598], 5.00th=[ 1942], 10.00th=[ 2966], 20.00th=[ 5080], | 30.00th=[ 8586], 40.00th=[ 14877], 50.00th=[ 23200], 60.00th=[ 32375], | 70.00th=[ 43779], 80.00th=[ 57410], 90.00th=[ 77071], 95.00th=[ 95945], | 99.00th=[130548], 99.50th=[156238], 99.90th=[162530], 99.95th=[162530], | 99.99th=[162530] bw ( KiB/s): min= 31, max= 478, per=25.46%, avg=220.73, stdev=87.05, samples=55 iops : min= 1, max= 29, avg=13.05, stdev= 5.43, samples=55 lat (usec) : 50=1.17%, 100=4.69%, 250=0.52%, 500=0.26%, 1000=0.13% lat (msec) : 2=2.99%, 4=4.56%, 10=8.85%, 20=8.59%, 50=39.45% lat (msec) : 100=25.65%, 250=3.12% cpu : usr=0.07%, sys=6.32%, ctx=1617, 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=824KiB/s (844kB/s), 201KiB/s-215KiB/s (205kB/s-220kB/s), io=23.4MiB (24.5MB), run=28293-29063msec WRITE: bw=867KiB/s (888kB/s), 208KiB/s-228KiB/s (213kB/s-234kB/s), io=24.6MiB (25.8MB), run=28293-29063msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179537: Fri Oct 2 10:55:08 2026 read: IOPS=8, BW=141KiB/s (144kB/s)(5920KiB/42120msec) clat (msec): min=6, max=292, avg=46.90, stdev=38.47 lat (msec): min=6, max=292, avg=46.91, stdev=38.47 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 13], 10.00th=[ 15], 20.00th=[ 20], | 30.00th=[ 25], 40.00th=[ 30], 50.00th=[ 37], 60.00th=[ 44], | 70.00th=[ 52], 80.00th=[ 63], 90.00th=[ 94], 95.00th=[ 126], | 99.00th=[ 199], 99.50th=[ 266], 99.90th=[ 292], 99.95th=[ 292], | 99.99th=[ 292] bw ( KiB/s): min= 31, max= 384, per=24.82%, avg=140.95, stdev=78.23, samples=80 iops : min= 1, max= 24, avg= 7.98, stdev= 4.97, samples=80 write: IOPS=9, BW=151KiB/s (155kB/s)(6368KiB/42120msec); 0 zone resets clat (msec): min=14, max=245, avg=61.83, stdev=37.26 lat (msec): min=14, max=245, avg=61.84, stdev=37.25 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 23], 10.00th=[ 26], 20.00th=[ 33], | 30.00th=[ 38], 40.00th=[ 44], 50.00th=[ 54], 60.00th=[ 62], | 70.00th=[ 71], 80.00th=[ 88], 90.00th=[ 113], 95.00th=[ 138], | 99.00th=[ 192], 99.50th=[ 220], 99.90th=[ 247], 99.95th=[ 247], | 99.99th=[ 247] bw ( KiB/s): min= 31, max= 378, per=25.05%, avg=149.79, stdev=77.49, samples=82 iops : min= 1, max= 23, avg= 8.55, stdev= 4.90, samples=82 lat (msec) : 10=1.30%, 20=9.38%, 50=47.27%, 100=30.60%, 250=11.20% lat (msec) : 500=0.26% cpu : usr=0.03%, sys=1.90%, ctx=1210, 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=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=179538: Fri Oct 2 10:55:08 2026 read: IOPS=8, BW=136KiB/s (140kB/s)(5744KiB/42088msec) clat (msec): min=7, max=192, avg=44.51, stdev=33.87 lat (msec): min=7, max=192, avg=44.51, stdev=33.87 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 12], 10.00th=[ 15], 20.00th=[ 19], | 30.00th=[ 25], 40.00th=[ 29], 50.00th=[ 34], 60.00th=[ 40], | 70.00th=[ 51], 80.00th=[ 64], 90.00th=[ 91], 95.00th=[ 115], | 99.00th=[ 171], 99.50th=[ 188], 99.90th=[ 192], 99.95th=[ 192], | 99.99th=[ 192] bw ( KiB/s): min= 30, max= 378, per=24.75%, avg=140.59, stdev=81.86, samples=79 iops : min= 1, max= 23, avg= 7.96, stdev= 5.18, samples=79 write: IOPS=9, BW=155KiB/s (159kB/s)(6544KiB/42088msec); 0 zone resets clat (msec): min=9, max=269, avg=63.45, stdev=39.54 lat (msec): min=9, max=269, avg=63.45, stdev=39.54 clat percentiles (msec): | 1.00th=[ 19], 5.00th=[ 23], 10.00th=[ 26], 20.00th=[ 31], | 30.00th=[ 37], 40.00th=[ 44], 50.00th=[ 51], 60.00th=[ 64], | 70.00th=[ 75], 80.00th=[ 93], 90.00th=[ 115], 95.00th=[ 140], | 99.00th=[ 190], 99.50th=[ 211], 99.90th=[ 271], 99.95th=[ 271], | 99.99th=[ 271] bw ( KiB/s): min= 31, max= 448, per=25.54%, avg=152.74, stdev=78.86, samples=82 iops : min= 1, max= 28, avg= 8.73, stdev= 5.01, samples=82 lat (msec) : 10=1.43%, 20=9.90%, 50=47.01%, 100=29.95%, 250=11.59% lat (msec) : 500=0.13% cpu : usr=0.06%, sys=1.84%, ctx=1276, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=359,409,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179539: Fri Oct 2 10:55:08 2026 read: IOPS=9, BW=149KiB/s (153kB/s)(6256KiB/41927msec) clat (msec): min=6, max=285, avg=46.67, stdev=38.18 lat (msec): min=6, max=285, avg=46.67, stdev=38.18 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 13], 10.00th=[ 16], 20.00th=[ 20], | 30.00th=[ 25], 40.00th=[ 30], 50.00th=[ 37], 60.00th=[ 43], | 70.00th=[ 51], 80.00th=[ 65], 90.00th=[ 95], 95.00th=[ 125], | 99.00th=[ 190], 99.50th=[ 211], 99.90th=[ 288], 99.95th=[ 288], | 99.99th=[ 288] bw ( KiB/s): min= 31, max= 474, per=26.28%, avg=149.27, stdev=85.37, samples=82 iops : min= 1, max= 29, avg= 8.51, stdev= 5.40, samples=82 write: IOPS=8, BW=144KiB/s (147kB/s)(6032KiB/41927msec); 0 zone resets clat (msec): min=12, max=260, avg=62.61, stdev=39.67 lat (msec): min=12, max=260, avg=62.62, stdev=39.67 clat percentiles (msec): | 1.00th=[ 16], 5.00th=[ 22], 10.00th=[ 26], 20.00th=[ 32], | 30.00th=[ 36], 40.00th=[ 43], 50.00th=[ 51], 60.00th=[ 61], | 70.00th=[ 72], 80.00th=[ 92], 90.00th=[ 126], 95.00th=[ 140], | 99.00th=[ 186], 99.50th=[ 224], 99.90th=[ 262], 99.95th=[ 262], | 99.99th=[ 262] bw ( KiB/s): min= 31, max= 416, per=24.62%, avg=147.25, stdev=78.13, samples=79 iops : min= 1, max= 26, avg= 8.39, stdev= 4.98, samples=79 lat (msec) : 10=0.65%, 20=11.98%, 50=47.40%, 100=27.60%, 250=12.11% lat (msec) : 500=0.26% cpu : usr=0.05%, sys=1.82%, ctx=1182, 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=179540: Fri Oct 2 10:55:08 2026 read: IOPS=9, BW=147KiB/s (150kB/s)(6032KiB/41124msec) clat (msec): min=5, max=197, avg=44.41, stdev=33.36 lat (msec): min=5, max=197, avg=44.42, stdev=33.36 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 14], 10.00th=[ 15], 20.00th=[ 21], | 30.00th=[ 26], 40.00th=[ 30], 50.00th=[ 35], 60.00th=[ 42], | 70.00th=[ 49], 80.00th=[ 60], 90.00th=[ 86], 95.00th=[ 122], | 99.00th=[ 178], 99.50th=[ 186], 99.90th=[ 199], 99.95th=[ 199], | 99.99th=[ 199] bw ( KiB/s): min= 31, max= 447, per=26.22%, avg=148.95, stdev=79.34, samples=78 iops : min= 1, max= 27, avg= 8.50, stdev= 4.99, samples=78 write: IOPS=9, BW=152KiB/s (156kB/s)(6256KiB/41124msec); 0 zone resets clat (msec): min=9, max=222, avg=62.00, stdev=40.19 lat (msec): min=9, max=222, avg=62.00, stdev=40.19 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 23], 10.00th=[ 25], 20.00th=[ 32], | 30.00th=[ 36], 40.00th=[ 42], 50.00th=[ 47], 60.00th=[ 57], | 70.00th=[ 71], 80.00th=[ 89], 90.00th=[ 117], 95.00th=[ 153], | 99.00th=[ 201], 99.50th=[ 222], 99.90th=[ 224], 99.95th=[ 224], | 99.99th=[ 224] bw ( KiB/s): min= 31, max= 512, per=25.19%, avg=150.61, stdev=83.46, samples=80 iops : min= 1, max= 32, avg= 8.60, stdev= 5.31, samples=80 lat (msec) : 10=0.65%, 20=10.81%, 50=50.65%, 100=26.04%, 250=11.85% cpu : usr=0.08%, sys=1.93%, ctx=1184, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=569KiB/s (582kB/s), 136KiB/s-149KiB/s (140kB/s-153kB/s), io=23.4MiB (24.5MB), run=41124-42120msec WRITE: bw=598KiB/s (613kB/s), 144KiB/s-155KiB/s (147kB/s-159kB/s), io=24.6MiB (25.8MB), run=41124-42120msec 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=179557: Fri Oct 2 10:55:25 2026 read: IOPS=1, BW=1316KiB/s (1348kB/s)(7168KiB/5447msec) clat (msec): min=2, max=2705, avg=528.96, stdev=963.39 lat (msec): min=2, max=2705, avg=528.97, stdev=963.39 clat percentiles (msec): | 1.00th=[ 3], 5.00th=[ 3], 10.00th=[ 3], 20.00th=[ 129], | 30.00th=[ 180], 40.00th=[ 180], 50.00th=[ 215], 60.00th=[ 230], | 70.00th=[ 230], 80.00th=[ 243], 90.00th=[ 2702], 95.00th=[ 2702], | 99.00th=[ 2702], 99.50th=[ 2702], 99.90th=[ 2702], 99.95th=[ 2702], | 99.99th=[ 2702] bw ( KiB/s): min= 1521, max= 4079, per=73.78%, avg=2310.00, stdev=1009.54, samples=5 iops : min= 1, max= 3, avg= 1.40, stdev= 0.89, samples=5 write: IOPS=0, BW=940KiB/s (963kB/s)(5120KiB/5447msec); 0 zone resets clat (msec): min=149, max=710, avg=340.21, stdev=218.65 lat (msec): min=150, max=710, avg=340.30, stdev=218.65 clat percentiles (msec): | 1.00th=[ 150], 5.00th=[ 150], 10.00th=[ 150], 20.00th=[ 150], | 30.00th=[ 213], 40.00th=[ 213], 50.00th=[ 305], 60.00th=[ 305], | 70.00th=[ 326], 80.00th=[ 326], 90.00th=[ 709], 95.00th=[ 709], | 99.00th=[ 709], 99.50th=[ 709], 99.90th=[ 709], 99.95th=[ 709], | 99.99th=[ 709] bw ( KiB/s): min= 1950, max= 2039, per=45.52%, avg=1995.25, stdev=46.23, samples=4 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=4 lat (msec) : 4=8.33%, 250=58.33%, 500=16.67%, 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=9.75%, ctx=665, 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=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=179558: Fri Oct 2 10:55:25 2026 read: IOPS=0, BW=313KiB/s (321kB/s)(2048KiB/6541msec) clat (usec): min=545, max=129173, avg=64859.34, stdev=90954.08 lat (usec): min=546, max=129175, avg=64860.76, stdev=90954.19 clat percentiles (usec): | 1.00th=[ 545], 5.00th=[ 545], 10.00th=[ 545], 20.00th=[ 545], | 30.00th=[ 545], 40.00th=[ 545], 50.00th=[ 545], 60.00th=[129500], | 70.00th=[129500], 80.00th=[129500], 90.00th=[129500], 95.00th=[129500], | 99.00th=[129500], 99.50th=[129500], 99.90th=[129500], 99.95th=[129500], | 99.99th=[129500] bw ( KiB/s): min= 1488, max= 2031, per=56.20%, avg=1759.50, stdev=383.96, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1566KiB/s (1603kB/s)(10.0MiB/6541msec); 0 zone resets clat (msec): min=126, max=3193, avg=629.68, stdev=933.47 lat (msec): min=126, max=3193, avg=630.09, stdev=933.31 clat percentiles (msec): | 1.00th=[ 127], 5.00th=[ 127], 10.00th=[ 127], 20.00th=[ 136], | 30.00th=[ 222], 40.00th=[ 239], 50.00th=[ 247], 60.00th=[ 305], | 70.00th=[ 363], 80.00th=[ 506], 90.00th=[ 961], 95.00th=[ 3205], | 99.00th=[ 3205], 99.50th=[ 3205], 99.90th=[ 3205], 99.95th=[ 3205], | 99.99th=[ 3205] bw ( KiB/s): min= 1961, max= 4063, per=73.09%, avg=3203.60, stdev=1101.00, samples=5 iops : min= 1, max= 3, avg= 2.20, stdev= 1.10, samples=5 lat (usec) : 750=8.33% lat (msec) : 250=50.00%, 500=16.67%, 750=8.33%, 1000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=7.86%, ctx=129, 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=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=179559: Fri Oct 2 10:55:25 2026 read: IOPS=1, BW=1080KiB/s (1106kB/s)(6144KiB/5691msec) clat (usec): min=507, max=889503, avg=210435.39, stdev=342399.07 lat (usec): min=508, max=889505, avg=210436.97, stdev=342399.18 clat percentiles (usec): | 1.00th=[ 506], 5.00th=[ 506], 10.00th=[ 506], 20.00th=[ 611], | 30.00th=[ 611], 40.00th=[ 38011], 50.00th=[ 38011], 60.00th=[125305], | 70.00th=[208667], 80.00th=[208667], 90.00th=[893387], 95.00th=[893387], | 99.00th=[893387], 99.50th=[893387], 99.90th=[893387], 99.95th=[893387], | 99.99th=[893387] bw ( KiB/s): min= 2039, max= 3900, per=94.84%, avg=2969.50, stdev=1315.93, samples=2 iops : min= 1, max= 3, avg= 2.00, stdev= 1.41, samples=2 write: IOPS=1, BW=1080KiB/s (1106kB/s)(6144KiB/5691msec); 0 zone resets clat (msec): min=146, max=2838, avg=719.07, stdev=1044.44 lat (msec): min=146, max=2838, avg=719.15, stdev=1044.45 clat percentiles (msec): | 1.00th=[ 148], 5.00th=[ 148], 10.00th=[ 148], 20.00th=[ 241], | 30.00th=[ 241], 40.00th=[ 255], 50.00th=[ 255], 60.00th=[ 355], | 70.00th=[ 485], 80.00th=[ 485], 90.00th=[ 2836], 95.00th=[ 2836], | 99.00th=[ 2836], 99.50th=[ 2836], 99.90th=[ 2836], 99.95th=[ 2836], | 99.99th=[ 2836] bw ( KiB/s): min= 1528, max= 2031, per=42.91%, avg=1880.75, stdev=236.92, samples=4 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=4 lat (usec) : 750=16.67% lat (msec) : 50=8.33%, 250=33.33%, 500=25.00%, 1000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=7.07%, ctx=185, 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=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=179560: Fri Oct 2 10:55:25 2026 read: IOPS=0, BW=920KiB/s (942kB/s)(5120KiB/5563msec) clat (msec): min=2, max=308, avg=169.53, stdev=153.62 lat (msec): min=2, max=308, avg=169.53, stdev=153.62 clat percentiles (msec): | 1.00th=[ 3], 5.00th=[ 3], 10.00th=[ 3], 20.00th=[ 3], | 30.00th=[ 3], 40.00th=[ 3], 50.00th=[ 264], 60.00th=[ 264], | 70.00th=[ 271], 80.00th=[ 271], 90.00th=[ 309], 95.00th=[ 309], | 99.00th=[ 309], 99.50th=[ 309], 99.90th=[ 309], 99.95th=[ 309], | 99.99th=[ 309] bw ( KiB/s): min= 2031, max= 6119, per=100.00%, avg=4075.00, stdev=2890.65, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 write: IOPS=1, BW=1289KiB/s (1319kB/s)(7168KiB/5563msec); 0 zone resets clat (msec): min=136, max=2820, avg=667.22, stdev=961.50 lat (msec): min=136, max=2820, avg=667.31, stdev=961.49 clat percentiles (msec): | 1.00th=[ 138], 5.00th=[ 138], 10.00th=[ 138], 20.00th=[ 157], | 30.00th=[ 245], 40.00th=[ 245], 50.00th=[ 300], 60.00th=[ 485], | 70.00th=[ 485], 80.00th=[ 531], 90.00th=[ 2836], 95.00th=[ 2836], | 99.00th=[ 2836], 99.50th=[ 2836], 99.90th=[ 2836], 99.95th=[ 2836], | 99.99th=[ 2836] bw ( KiB/s): min= 1643, max= 3900, per=54.43%, avg=2385.75, stdev=1023.93, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 lat (msec) : 4=16.67%, 250=25.00%, 500=41.67%, 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=9.67%, ctx=165, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=5,7,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=3131KiB/s (3206kB/s), 313KiB/s-1316KiB/s (321kB/s-1348kB/s), io=20.0MiB (20.0MB), run=5447-6541msec WRITE: bw=4383KiB/s (4489kB/s), 940KiB/s-1566KiB/s (963kB/s-1603kB/s), io=28.0MiB (29.4MB), run=5447-6541msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179562: Fri Oct 2 10:55:26 2026 read: IOPS=0, BW=989KiB/s (1013kB/s)(7168KiB/7249msec) clat (msec): min=74, max=2575, avg=780.41, stdev=917.05 lat (msec): min=74, max=2575, avg=780.41, stdev=917.05 clat percentiles (msec): | 1.00th=[ 74], 5.00th=[ 74], 10.00th=[ 74], 20.00th=[ 93], | 30.00th=[ 106], 40.00th=[ 106], 50.00th=[ 584], 60.00th=[ 667], | 70.00th=[ 667], 80.00th=[ 1368], 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= 1969, max= 4063, per=85.88%, avg=2426.00, stdev=915.58, samples=5 iops : min= 1, max= 3, avg= 1.60, stdev= 0.89, samples=5 write: IOPS=0, BW=706KiB/s (723kB/s)(5120KiB/7249msec); 0 zone resets clat (msec): min=98, max=1251, avg=349.24, stdev=504.97 lat (msec): min=98, max=1253, avg=349.78, stdev=506.02 clat percentiles (msec): | 1.00th=[ 99], 5.00th=[ 99], 10.00th=[ 99], 20.00th=[ 99], | 30.00th=[ 102], 40.00th=[ 102], 50.00th=[ 136], 60.00th=[ 136], | 70.00th=[ 161], 80.00th=[ 161], 90.00th=[ 1250], 95.00th=[ 1250], | 99.00th=[ 1250], 99.50th=[ 1250], 99.90th=[ 1250], 99.95th=[ 1250], | 99.99th=[ 1250] bw ( KiB/s): min= 2043, max= 7876, per=100.00%, avg=4959.50, stdev=4124.55, samples=2 iops : min= 1, max= 7, avg= 4.00, stdev= 4.24, samples=2 lat (msec) : 100=25.00%, 250=33.33%, 750=16.67%, 2000=16.67%, >=2000=8.33% cpu : usr=0.01%, sys=1.99%, ctx=64, 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=179563: Fri Oct 2 10:55:26 2026 read: IOPS=0, BW=296KiB/s (303kB/s)(2048KiB/6921msec) clat (msec): min=71, max=597, avg=334.59, stdev=372.07 lat (msec): min=71, max=597, avg=334.59, stdev=372.08 clat percentiles (msec): | 1.00th=[ 72], 5.00th=[ 72], 10.00th=[ 72], 20.00th=[ 72], | 30.00th=[ 72], 40.00th=[ 72], 50.00th=[ 72], 60.00th=[ 600], | 70.00th=[ 600], 80.00th=[ 600], 90.00th=[ 600], 95.00th=[ 600], | 99.00th=[ 600], 99.50th=[ 600], 99.90th=[ 600], 99.95th=[ 600], | 99.99th=[ 600] bw ( KiB/s): min= 2027, max= 2043, per=72.04%, avg=2035.00, stdev=11.31, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1480KiB/s (1515kB/s)(10.0MiB/6921msec); 0 zone resets clat (msec): min=92, max=2749, avg=618.26, stdev=795.51 lat (msec): min=92, max=2749, avg=618.43, stdev=795.46 clat percentiles (msec): | 1.00th=[ 92], 5.00th=[ 92], 10.00th=[ 92], 20.00th=[ 94], | 30.00th=[ 120], 40.00th=[ 176], 50.00th=[ 409], 60.00th=[ 439], | 70.00th=[ 584], 80.00th=[ 625], 90.00th=[ 902], 95.00th=[ 2735], | 99.00th=[ 2735], 99.50th=[ 2735], 99.90th=[ 2735], 99.95th=[ 2735], | 99.99th=[ 2735] bw ( KiB/s): min= 1976, max= 4055, per=68.21%, avg=2697.83, stdev=1048.43, samples=6 iops : min= 1, max= 3, avg= 1.67, stdev= 1.03, samples=6 lat (msec) : 100=25.00%, 250=16.67%, 500=16.67%, 750=25.00%, 1000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=2.57%, ctx=83, 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=179564: Fri Oct 2 10:55:26 2026 read: IOPS=0, BW=927KiB/s (949kB/s)(6144KiB/6629msec) clat (msec): min=74, max=1022, avg=329.04, stdev=365.39 lat (msec): min=74, max=1022, avg=329.04, stdev=365.39 clat percentiles (msec): | 1.00th=[ 74], 5.00th=[ 74], 10.00th=[ 74], 20.00th=[ 78], | 30.00th=[ 78], 40.00th=[ 140], 50.00th=[ 140], 60.00th=[ 228], | 70.00th=[ 435], 80.00th=[ 435], 90.00th=[ 1020], 95.00th=[ 1020], | 99.00th=[ 1020], 99.50th=[ 1020], 99.90th=[ 1020], 99.95th=[ 1020], | 99.99th=[ 1020] bw ( KiB/s): min= 2023, max= 4055, per=89.77%, avg=2536.00, stdev=1012.68, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 write: IOPS=0, BW=927KiB/s (949kB/s)(6144KiB/6629msec); 0 zone resets clat (msec): min=92, max=3157, avg=750.91, stdev=1187.82 lat (msec): min=92, max=3157, avg=751.06, stdev=1187.92 clat percentiles (msec): | 1.00th=[ 93], 5.00th=[ 93], 10.00th=[ 93], 20.00th=[ 138], | 30.00th=[ 138], 40.00th=[ 241], 50.00th=[ 241], 60.00th=[ 435], | 70.00th=[ 443], 80.00th=[ 443], 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= 2031, max= 4087, per=77.12%, avg=3050.00, stdev=1174.45, samples=4 iops : min= 1, max= 3, avg= 2.00, stdev= 1.15, samples=4 lat (msec) : 100=25.00%, 250=33.33%, 500=25.00%, 2000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=2.60%, ctx=81, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=179565: Fri Oct 2 10:55:26 2026 read: IOPS=0, BW=712KiB/s (729kB/s)(5120KiB/7190msec) clat (msec): min=129, max=625, avg=385.71, stdev=226.02 lat (msec): min=129, max=625, avg=385.71, stdev=226.02 clat percentiles (msec): | 1.00th=[ 130], 5.00th=[ 130], 10.00th=[ 130], 20.00th=[ 130], | 30.00th=[ 161], 40.00th=[ 161], 50.00th=[ 485], 60.00th=[ 485], | 70.00th=[ 527], 80.00th=[ 527], 90.00th=[ 625], 95.00th=[ 625], | 99.00th=[ 625], 99.50th=[ 625], 99.90th=[ 625], 99.95th=[ 625], | 99.99th=[ 625] bw ( KiB/s): min= 2023, max= 2043, per=71.96%, avg=2033.00, stdev= 9.52, samples=4 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=4 write: IOPS=0, BW=997KiB/s (1021kB/s)(7168KiB/7190msec); 0 zone resets clat (msec): min=117, max=3101, avg=737.84, stdev=1056.35 lat (msec): min=118, max=3101, avg=737.99, stdev=1056.33 clat percentiles (msec): | 1.00th=[ 118], 5.00th=[ 118], 10.00th=[ 118], 20.00th=[ 222], | 30.00th=[ 251], 40.00th=[ 251], 50.00th=[ 355], 60.00th=[ 485], | 70.00th=[ 485], 80.00th=[ 634], 90.00th=[ 3104], 95.00th=[ 3104], | 99.00th=[ 3104], 99.50th=[ 3104], 99.90th=[ 3104], 99.95th=[ 3104], | 99.99th=[ 3104] bw ( KiB/s): min= 2023, max= 4063, per=64.25%, avg=2541.00, stdev=1014.70, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 lat (msec) : 250=33.33%, 500=33.33%, 750=25.00%, >=2000=8.33% cpu : usr=0.00%, sys=3.46%, ctx=95, 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=2825KiB/s (2893kB/s), 296KiB/s-989KiB/s (303kB/s-1013kB/s), io=20.0MiB (20.0MB), run=6629-7249msec WRITE: bw=3955KiB/s (4050kB/s), 706KiB/s-1480KiB/s (723kB/s-1515kB/s), io=28.0MiB (29.4MB), run=6629-7249msec 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=179573: Fri Oct 2 10:55:40 2026 read: IOPS=1, BW=4642KiB/s (4754kB/s)(12.0MiB/2647msec) clat (msec): min=298, max=1465, avg=821.46, stdev=593.25 lat (msec): min=298, max=1465, avg=821.46, stdev=593.25 clat percentiles (msec): | 1.00th=[ 300], 5.00th=[ 300], 10.00th=[ 300], 20.00th=[ 300], | 30.00th=[ 300], 40.00th=[ 701], 50.00th=[ 701], 60.00th=[ 701], | 70.00th=[ 1469], 80.00th=[ 1469], 90.00th=[ 1469], 95.00th=[ 1469], | 99.00th=[ 1469], 99.50th=[ 1469], 99.90th=[ 1469], 99.95th=[ 1469], | 99.99th=[ 1469] bw ( KiB/s): min= 8175, max= 8175, per=100.00%, avg=8175.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 750=33.33%, 2000=33.33% cpu : usr=0.00%, sys=3.70%, 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=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=179574: Fri Oct 2 10:55:40 2026 read: IOPS=0, BW=1529KiB/s (1566kB/s)(4096KiB/2678msec) clat (nsec): min=1106.0M, max=1106.0M, avg=1106004966.00, stdev= 0.00 lat (nsec): min=1106.0M, max=1106.0M, avg=1106007279.00, 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=3059KiB/s (3132kB/s)(8192KiB/2678msec); 0 zone resets clat (msec): min=497, max=937, avg=717.75, stdev=311.42 lat (msec): min=497, max=938, avg=718.16, stdev=311.36 clat percentiles (msec): | 1.00th=[ 498], 5.00th=[ 498], 10.00th=[ 498], 20.00th=[ 498], | 30.00th=[ 498], 40.00th=[ 498], 50.00th=[ 498], 60.00th=[ 936], | 70.00th=[ 936], 80.00th=[ 936], 90.00th=[ 936], 95.00th=[ 936], | 99.00th=[ 936], 99.50th=[ 936], 99.90th=[ 936], 99.95th=[ 936], | 99.99th=[ 936] bw ( KiB/s): min= 8159, max= 8159, per=66.69%, avg=8159.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=3.81%, ctx=50, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1,2,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179575: Fri Oct 2 10:55:40 2026 write: IOPS=1, BW=5611KiB/s (5746kB/s)(12.0MiB/2190msec); 0 zone resets clat (msec): min=612, max=828, avg=716.31, stdev=108.53 lat (msec): min=612, max=828, avg=716.98, stdev=108.41 clat percentiles (msec): | 1.00th=[ 609], 5.00th=[ 609], 10.00th=[ 609], 20.00th=[ 609], | 30.00th=[ 609], 40.00th=[ 709], 50.00th=[ 709], 60.00th=[ 709], | 70.00th=[ 827], 80.00th=[ 827], 90.00th=[ 827], 95.00th=[ 827], | 99.00th=[ 827], 99.50th=[ 827], 99.90th=[ 827], 99.95th=[ 827], | 99.99th=[ 827] bw ( KiB/s): min= 6234, max= 8175, per=58.88%, avg=7204.50, stdev=1372.49, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=66.67%, 1000=33.33% cpu : usr=0.00%, sys=5.16%, ctx=72, 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=179577: Fri Oct 2 10:55:40 2026 write: IOPS=1, BW=5211KiB/s (5336kB/s)(12.0MiB/2358msec); 0 zone resets clat (msec): min=217, max=1538, avg=738.59, stdev=703.53 lat (msec): min=219, max=1539, avg=739.84, stdev=702.84 clat percentiles (msec): | 1.00th=[ 218], 5.00th=[ 218], 10.00th=[ 218], 20.00th=[ 218], | 30.00th=[ 218], 40.00th=[ 460], 50.00th=[ 460], 60.00th=[ 460], | 70.00th=[ 1536], 80.00th=[ 1536], 90.00th=[ 1536], 95.00th=[ 1536], | 99.00th=[ 1536], 99.50th=[ 1536], 99.90th=[ 1536], 99.95th=[ 1536], | 99.99th=[ 1536] bw ( KiB/s): min= 7406, max= 8047, per=63.15%, avg=7726.50, stdev=453.26, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 250=33.33%, 500=33.33%, 2000=33.33% cpu : usr=0.04%, sys=5.26%, ctx=43, 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=6118KiB/s (6265kB/s), 1529KiB/s-4642KiB/s (1566kB/s-4754kB/s), io=16.0MiB (16.8MB), run=2647-2678msec WRITE: bw=11.9MiB/s (12.5MB/s), 3059KiB/s-5611KiB/s (3132kB/s-5746kB/s), io=32.0MiB (33.6MB), run=2190-2678msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179576: Fri Oct 2 10:55:40 2026 read: IOPS=1, BW=6092KiB/s (6238kB/s)(12.0MiB/2017msec) clat (msec): min=545, max=738, avg=641.53, stdev=96.58 lat (msec): min=545, max=738, avg=641.53, stdev=96.58 clat percentiles (msec): | 1.00th=[ 550], 5.00th=[ 550], 10.00th=[ 550], 20.00th=[ 550], | 30.00th=[ 550], 40.00th=[ 642], 50.00th=[ 642], 60.00th=[ 642], | 70.00th=[ 743], 80.00th=[ 743], 90.00th=[ 743], 95.00th=[ 743], | 99.00th=[ 743], 99.50th=[ 743], 99.90th=[ 743], 99.95th=[ 743], | 99.99th=[ 743] bw ( KiB/s): min= 8078, max= 8159, per=100.00%, avg=8118.50, stdev=57.28, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=100.00% cpu : usr=0.00%, sys=15.92%, ctx=320, majf=0, minf=9 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=3,0,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179578: Fri Oct 2 10:55:40 2026 read: IOPS=0, BW=1922KiB/s (1968kB/s)(4096KiB/2131msec) clat (nsec): min=639367k, max=639367k, avg=639366664.00, stdev= 0.00 lat (nsec): min=639370k, max=639370k, avg=639369707.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 642], 5.00th=[ 642], 10.00th=[ 642], 20.00th=[ 642], | 30.00th=[ 642], 40.00th=[ 642], 50.00th=[ 642], 60.00th=[ 642], | 70.00th=[ 642], 80.00th=[ 642], 90.00th=[ 642], 95.00th=[ 642], | 99.00th=[ 642], 99.50th=[ 642], 99.90th=[ 642], 99.95th=[ 642], | 99.99th=[ 642] bw ( KiB/s): min= 8159, max= 8159, per=100.00%, avg=8159.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=3844KiB/s (3936kB/s)(8192KiB/2131msec); 0 zone resets clat (msec): min=290, max=1040, avg=665.18, stdev=530.42 lat (msec): min=290, max=1040, avg=665.61, stdev=530.37 clat percentiles (msec): | 1.00th=[ 292], 5.00th=[ 292], 10.00th=[ 292], 20.00th=[ 292], | 30.00th=[ 292], 40.00th=[ 292], 50.00th=[ 292], 60.00th=[ 1045], | 70.00th=[ 1045], 80.00th=[ 1045], 90.00th=[ 1045], 95.00th=[ 1045], | 99.00th=[ 1045], 99.50th=[ 1045], 99.90th=[ 1045], 99.95th=[ 1045], | 99.99th=[ 1045] bw ( KiB/s): min= 8159, max= 8159, per=75.20%, avg=8159.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 750=33.33%, 2000=33.33% cpu : usr=0.00%, sys=6.71%, ctx=122, 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=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=179579: Fri Oct 2 10:55:40 2026 write: IOPS=0, BW=4069KiB/s (4167kB/s)(12.0MiB/3020msec); 0 zone resets clat (msec): min=153, max=2586, avg=977.06, stdev=1394.36 lat (msec): min=154, max=2587, avg=978.79, stdev=1393.63 clat percentiles (msec): | 1.00th=[ 155], 5.00th=[ 155], 10.00th=[ 155], 20.00th=[ 155], | 30.00th=[ 155], 40.00th=[ 192], 50.00th=[ 192], 60.00th=[ 192], | 70.00th=[ 2601], 80.00th=[ 2601], 90.00th=[ 2601], 95.00th=[ 2601], | 99.00th=[ 2601], 99.50th=[ 2601], 99.90th=[ 2601], 99.95th=[ 2601], | 99.99th=[ 2601] bw ( KiB/s): min= 8000, max= 8000, per=73.73%, avg=8000.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 250=66.67%, >=2000=33.33% cpu : usr=0.00%, sys=3.11%, ctx=67, majf=0, minf=9 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=179580: Fri Oct 2 10:55:40 2026 write: IOPS=1, BW=4710KiB/s (4823kB/s)(12.0MiB/2609msec); 0 zone resets clat (msec): min=467, max=1470, avg=845.55, stdev=545.06 lat (msec): min=467, max=1470, avg=845.98, stdev=545.06 clat percentiles (msec): | 1.00th=[ 468], 5.00th=[ 468], 10.00th=[ 468], 20.00th=[ 468], | 30.00th=[ 468], 40.00th=[ 600], 50.00th=[ 600], 60.00th=[ 600], | 70.00th=[ 1469], 80.00th=[ 1469], 90.00th=[ 1469], 95.00th=[ 1469], | 99.00th=[ 1469], 99.50th=[ 1469], 99.90th=[ 1469], 99.95th=[ 1469], | 99.99th=[ 1469] bw ( KiB/s): min= 5461, max= 8159, per=62.76%, avg=6810.00, stdev=1907.77, 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=0.04%, sys=3.57%, ctx=35, majf=0, minf=10 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=7688KiB/s (7873kB/s), 1922KiB/s-6092KiB/s (1968kB/s-6238kB/s), io=16.0MiB (16.8MB), run=2017-2131msec WRITE: bw=10.6MiB/s (11.1MB/s), 3844KiB/s-4710KiB/s (3936kB/s-4823kB/s), io=32.0MiB (33.6MB), run=2131-3020msec