== sanity test 398b: DIO and buffer IO race ============== 00:03:16 (1788840196) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 5.26152 s, 9.6 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=180385: Tue Sep 8 00:05:31 2026 read: IOPS=12, BW=50.3KiB/s (51.5kB/s)(5992KiB/119217msec) clat (usec): min=34, max=199374, avg=43179.84, stdev=27985.12 lat (usec): min=34, max=199375, avg=43182.87, stdev=27984.98 clat percentiles (usec): | 1.00th=[ 53], 5.00th=[ 8717], 10.00th=[ 15664], 20.00th=[ 21103], | 30.00th=[ 25822], 40.00th=[ 32113], 50.00th=[ 38011], 60.00th=[ 44303], | 70.00th=[ 52691], 80.00th=[ 62129], 90.00th=[ 77071], 95.00th=[ 92799], | 99.00th=[147850], 99.50th=[156238], 99.90th=[187696], 99.95th=[200279], | 99.99th=[200279] bw ( KiB/s): min= 7, max= 110, per=25.09%, avg=50.18, stdev=18.78, samples=232 iops : min= 1, max= 27, avg=11.85, stdev= 4.71, samples=232 write: IOPS=13, BW=52.8KiB/s (54.1kB/s)(6296KiB/119217msec); 0 zone resets clat (usec): min=908, max=1134.9k, avg=34376.60, stdev=44361.13 lat (usec): min=910, max=1134.9k, avg=34383.16, stdev=44362.31 clat percentiles (usec): | 1.00th=[ 1090], 5.00th=[ 1254], 10.00th=[ 1876], | 20.00th=[ 3556], 30.00th=[ 6587], 40.00th=[ 15533], | 50.00th=[ 24511], 60.00th=[ 33162], 70.00th=[ 44303], | 80.00th=[ 58983], 90.00th=[ 81265], 95.00th=[ 104334], | 99.00th=[ 154141], 99.50th=[ 177210], 99.90th=[ 221250], | 99.95th=[1132463], 99.99th=[1132463] bw ( KiB/s): min= 7, max= 127, per=25.03%, avg=52.56, stdev=21.45, samples=233 iops : min= 1, max= 31, avg=12.45, stdev= 5.39, samples=233 lat (usec) : 50=0.26%, 100=1.60%, 250=0.16%, 500=0.07%, 1000=0.10% lat (msec) : 2=5.70%, 4=5.63%, 10=7.32%, 20=10.77%, 50=38.80% lat (msec) : 100=24.87%, 250=4.69%, 2000=0.03% cpu : usr=0.07%, sys=5.31%, ctx=6734, 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=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=180386: Tue Sep 8 00:05:31 2026 read: IOPS=12, BW=50.3KiB/s (51.5kB/s)(5940KiB/118175msec) clat (usec): min=45, max=332921, avg=42636.11, stdev=29600.70 lat (usec): min=46, max=332922, avg=42637.57, stdev=29600.65 clat percentiles (usec): | 1.00th=[ 56], 5.00th=[ 9110], 10.00th=[ 15533], 20.00th=[ 21103], | 30.00th=[ 25560], 40.00th=[ 30802], 50.00th=[ 37487], 60.00th=[ 43254], | 70.00th=[ 51119], 80.00th=[ 60556], 90.00th=[ 76022], 95.00th=[ 91751], | 99.00th=[145753], 99.50th=[189793], 99.90th=[274727], 99.95th=[333448], | 99.99th=[333448] bw ( KiB/s): min= 7, max= 119, per=25.03%, avg=50.06, stdev=19.12, samples=231 iops : min= 1, max= 29, avg=11.83, stdev= 4.80, samples=231 write: IOPS=13, BW=53.7KiB/s (55.0kB/s)(6348KiB/118175msec); 0 zone resets clat (usec): min=795, max=1011.4k, avg=34301.91, stdev=42320.38 lat (usec): min=795, max=1011.4k, avg=34308.44, stdev=42318.28 clat percentiles (usec): | 1.00th=[ 1045], 5.00th=[ 1221], 10.00th=[ 1926], | 20.00th=[ 3556], 30.00th=[ 6587], 40.00th=[ 15401], | 50.00th=[ 24511], 60.00th=[ 34341], 70.00th=[ 43779], | 80.00th=[ 58983], 90.00th=[ 80217], 95.00th=[ 101188], | 99.00th=[ 147850], 99.50th=[ 181404], 99.90th=[ 231736], | 99.95th=[1010828], 99.99th=[1010828] bw ( KiB/s): min= 7, max= 119, per=25.28%, avg=53.09, stdev=22.30, samples=232 iops : min= 1, max= 29, avg=12.58, stdev= 5.61, samples=232 lat (usec) : 50=0.07%, 100=1.63%, 250=0.46%, 500=0.07%, 750=0.03% lat (usec) : 1000=0.16% lat (msec) : 2=5.44%, 4=5.63%, 10=7.39%, 20=9.93%, 50=40.89% lat (msec) : 100=23.99%, 250=4.23%, 500=0.07%, 2000=0.03% cpu : usr=0.07%, sys=5.05%, ctx=6623, majf=0, minf=18 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1485,1587,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180387: Tue Sep 8 00:05:31 2026 read: IOPS=12, BW=51.2KiB/s (52.4kB/s)(6028KiB/117689msec) clat (usec): min=43, max=282943, avg=41628.73, stdev=27547.28 lat (usec): min=43, max=282944, avg=41630.92, stdev=27546.80 clat percentiles (usec): | 1.00th=[ 54], 5.00th=[ 8586], 10.00th=[ 15139], 20.00th=[ 20579], | 30.00th=[ 25822], 40.00th=[ 30540], 50.00th=[ 35914], 60.00th=[ 42206], | 70.00th=[ 50070], 80.00th=[ 60031], 90.00th=[ 74974], 95.00th=[ 87557], | 99.00th=[129500], 99.50th=[143655], 99.90th=[242222], 99.95th=[283116], | 99.99th=[283116] bw ( KiB/s): min= 7, max= 103, per=25.54%, avg=51.08, stdev=18.85, samples=230 iops : min= 1, max= 25, avg=12.08, stdev= 4.72, samples=230 write: IOPS=13, BW=53.2KiB/s (54.5kB/s)(6260KiB/117689msec); 0 zone resets clat (usec): min=896, max=999891, avg=34829.87, stdev=43085.07 lat (usec): min=897, max=999892, avg=34834.32, stdev=43087.92 clat percentiles (usec): | 1.00th=[ 1074], 5.00th=[ 1254], 10.00th=[ 1860], | 20.00th=[ 3556], 30.00th=[ 7504], 40.00th=[ 16057], | 50.00th=[ 25560], 60.00th=[ 33424], 70.00th=[ 44827], | 80.00th=[ 58983], 90.00th=[ 83362], 95.00th=[ 101188], | 99.00th=[ 149947], 99.50th=[ 175113], 99.90th=[ 417334], | 99.95th=[1002439], 99.99th=[1002439] bw ( KiB/s): min= 7, max= 118, per=25.25%, avg=53.03, stdev=22.55, samples=230 iops : min= 1, max= 29, avg=12.57, stdev= 5.68, samples=230 lat (usec) : 50=0.16%, 100=1.60%, 250=0.36%, 500=0.07%, 750=0.03% lat (usec) : 1000=0.07% lat (msec) : 2=5.53%, 4=5.63%, 10=6.35%, 20=11.75%, 50=40.66% lat (msec) : 100=23.47%, 250=4.23%, 500=0.07%, 1000=0.03% cpu : usr=0.06%, sys=5.22%, ctx=6628, 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=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=180388: Tue Sep 8 00:05:31 2026 read: IOPS=12, BW=50.6KiB/s (51.8kB/s)(6052KiB/119601msec) clat (usec): min=35, max=310665, avg=42641.67, stdev=28127.26 lat (usec): min=35, max=310666, avg=42642.85, stdev=28127.27 clat percentiles (usec): | 1.00th=[ 53], 5.00th=[ 7963], 10.00th=[ 15664], 20.00th=[ 21627], | 30.00th=[ 26608], 40.00th=[ 31851], 50.00th=[ 36963], 60.00th=[ 43779], | 70.00th=[ 51119], 80.00th=[ 60556], 90.00th=[ 77071], 95.00th=[ 94897], | 99.00th=[132645], 99.50th=[154141], 99.90th=[240124], 99.95th=[312476], | 99.99th=[312476] bw ( KiB/s): min= 7, max= 104, per=25.11%, avg=50.23, stdev=19.79, samples=234 iops : min= 1, max= 26, avg=11.87, stdev= 4.97, samples=234 write: IOPS=13, BW=52.1KiB/s (53.4kB/s)(6236KiB/119601msec); 0 zone resets clat (usec): min=917, max=1154.2k, avg=35086.81, stdev=45097.03 lat (usec): min=917, max=1154.2k, avg=35094.42, stdev=45097.95 clat percentiles (usec): | 1.00th=[ 1090], 5.00th=[ 1254], 10.00th=[ 1860], | 20.00th=[ 3523], 30.00th=[ 7046], 40.00th=[ 15401], | 50.00th=[ 24511], 60.00th=[ 34341], 70.00th=[ 44827], | 80.00th=[ 61080], 90.00th=[ 84411], 95.00th=[ 100140], | 99.00th=[ 143655], 99.50th=[ 175113], 99.90th=[ 246416], | 99.95th=[1149240], 99.99th=[1149240] bw ( KiB/s): min= 7, max= 119, per=24.74%, avg=51.95, stdev=20.61, samples=233 iops : min= 1, max= 29, avg=12.30, stdev= 5.19, samples=233 lat (usec) : 50=0.36%, 100=1.69%, 250=0.16%, 500=0.03%, 750=0.07% lat (usec) : 1000=0.13% lat (msec) : 2=5.40%, 4=5.53%, 10=6.90%, 20=10.42%, 50=40.66% lat (msec) : 100=24.32%, 250=4.26%, 500=0.03%, 2000=0.03% cpu : usr=0.06%, sys=5.18%, ctx=6747, 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=201KiB/s (206kB/s), 50.3KiB/s-51.2KiB/s (51.5kB/s-52.4kB/s), io=23.4MiB (24.6MB), run=117689-119601msec WRITE: bw=210KiB/s (215kB/s), 52.1KiB/s-53.7KiB/s (53.4kB/s-55.0kB/s), io=24.6MiB (25.7MB), run=117689-119601msec rand-rw: (groupid=0, jobs=1): err= 0: pid=180390: Tue Sep 8 00:06:04 2026 read: IOPS=9, BW=39.5KiB/s (40.4kB/s)(5992KiB/151806msec) clat (msec): min=4, max=1069, avg=39.37, stdev=45.71 lat (msec): min=4, max=1069, avg=39.37, stdev=45.71 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 21], 50.00th=[ 25], 60.00th=[ 31], | 70.00th=[ 41], 80.00th=[ 57], 90.00th=[ 88], 95.00th=[ 118], | 99.00th=[ 186], 99.50th=[ 211], 99.90th=[ 313], 99.95th=[ 1070], | 99.99th=[ 1070] bw ( KiB/s): min= 7, max= 159, per=25.13%, avg=39.46, stdev=29.81, samples=296 iops : min= 1, max= 39, avg= 9.22, stdev= 7.51, samples=296 write: IOPS=10, BW=41.5KiB/s (42.5kB/s)(6296KiB/151806msec); 0 zone resets clat (msec): min=9, max=356, avg=58.90, stdev=43.06 lat (msec): min=9, max=356, avg=58.90, stdev=43.06 clat percentiles (msec): | 1.00th=[ 14], 5.00th=[ 19], 10.00th=[ 22], 20.00th=[ 27], | 30.00th=[ 31], 40.00th=[ 36], 50.00th=[ 45], 60.00th=[ 54], | 70.00th=[ 70], 80.00th=[ 89], 90.00th=[ 117], 95.00th=[ 142], | 99.00th=[ 207], 99.50th=[ 245], 99.90th=[ 317], 99.95th=[ 359], | 99.99th=[ 359] bw ( KiB/s): min= 7, max= 128, per=25.14%, avg=41.48, stdev=27.47, samples=296 iops : min= 1, max= 32, avg= 9.73, stdev= 6.91, samples=296 lat (msec) : 10=4.00%, 20=18.95%, 50=42.74%, 100=22.59%, 250=11.39% lat (msec) : 500=0.29%, 2000=0.03% cpu : usr=0.05%, sys=1.81%, ctx=4633, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1498,1574,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180391: Tue Sep 8 00:06:04 2026 read: IOPS=9, BW=39.1KiB/s (40.0kB/s)(5940KiB/152037msec) clat (msec): min=5, max=1184, avg=40.07, stdev=47.96 lat (msec): min=5, max=1184, avg=40.07, stdev=47.96 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 25], 60.00th=[ 31], | 70.00th=[ 41], 80.00th=[ 59], 90.00th=[ 91], 95.00th=[ 122], | 99.00th=[ 184], 99.50th=[ 220], 99.90th=[ 288], 99.95th=[ 1183], | 99.99th=[ 1183] bw ( KiB/s): min= 7, max= 167, per=25.26%, avg=39.65, stdev=29.46, samples=291 iops : min= 1, max= 41, avg= 9.27, stdev= 7.41, samples=291 write: IOPS=10, BW=41.8KiB/s (42.8kB/s)(6348KiB/152037msec); 0 zone resets clat (msec): min=10, max=463, avg=58.22, stdev=43.59 lat (msec): min=10, max=463, avg=58.23, stdev=43.59 clat percentiles (msec): | 1.00th=[ 16], 5.00th=[ 19], 10.00th=[ 22], 20.00th=[ 26], | 30.00th=[ 31], 40.00th=[ 36], 50.00th=[ 43], 60.00th=[ 53], | 70.00th=[ 69], 80.00th=[ 88], 90.00th=[ 117], 95.00th=[ 144], | 99.00th=[ 203], 99.50th=[ 253], 99.90th=[ 342], 99.95th=[ 464], | 99.99th=[ 464] bw ( KiB/s): min= 7, max= 127, per=25.23%, avg=41.63, stdev=27.24, samples=296 iops : min= 1, max= 31, avg= 9.76, stdev= 6.85, samples=296 lat (msec) : 10=3.09%, 20=19.17%, 50=44.27%, 100=22.04%, 250=11.04% lat (msec) : 500=0.36%, 2000=0.03% cpu : usr=0.06%, sys=1.77%, ctx=4745, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1485,1587,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180392: Tue Sep 8 00:06:04 2026 read: IOPS=9, BW=39.7KiB/s (40.7kB/s)(6028KiB/151655msec) clat (msec): min=4, max=285, avg=40.28, stdev=37.61 lat (msec): min=4, max=285, avg=40.28, stdev=37.61 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 14], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 27], 60.00th=[ 33], | 70.00th=[ 44], 80.00th=[ 62], 90.00th=[ 92], 95.00th=[ 123], | 99.00th=[ 169], 99.50th=[ 211], 99.90th=[ 271], 99.95th=[ 288], | 99.99th=[ 288] bw ( KiB/s): min= 7, max= 142, per=25.61%, avg=40.21, stdev=27.84, samples=291 iops : min= 1, max= 35, avg= 9.41, stdev= 7.01, samples=291 write: IOPS=10, BW=41.3KiB/s (42.3kB/s)(6260KiB/151655msec); 0 zone resets clat (msec): min=10, max=1276, avg=58.02, stdev=51.59 lat (msec): min=10, max=1276, avg=58.03, stdev=51.59 clat percentiles (msec): | 1.00th=[ 15], 5.00th=[ 20], 10.00th=[ 22], 20.00th=[ 27], | 30.00th=[ 31], 40.00th=[ 35], 50.00th=[ 42], 60.00th=[ 53], | 70.00th=[ 68], 80.00th=[ 87], 90.00th=[ 112], 95.00th=[ 140], | 99.00th=[ 197], 99.50th=[ 220], 99.90th=[ 460], 99.95th=[ 1284], | 99.99th=[ 1284] bw ( KiB/s): min= 7, max= 127, per=24.93%, avg=41.14, stdev=27.52, samples=295 iops : min= 1, max= 31, avg= 9.64, stdev= 6.93, samples=295 lat (msec) : 10=2.96%, 20=18.85%, 50=43.85%, 100=23.05%, 250=11.07% lat (msec) : 500=0.20%, 2000=0.03% cpu : usr=0.06%, sys=1.76%, ctx=4651, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180393: Tue Sep 8 00:06:04 2026 read: IOPS=9, BW=39.9KiB/s (40.8kB/s)(6052KiB/151769msec) clat (msec): min=5, max=350, avg=38.98, stdev=37.34 lat (msec): min=5, max=350, avg=38.98, stdev=37.34 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=[ 31], | 70.00th=[ 41], 80.00th=[ 59], 90.00th=[ 89], 95.00th=[ 120], | 99.00th=[ 171], 99.50th=[ 192], 99.90th=[ 300], 99.95th=[ 351], | 99.99th=[ 351] bw ( KiB/s): min= 7, max= 159, per=25.85%, avg=40.58, stdev=29.22, samples=291 iops : min= 1, max= 39, avg= 9.51, stdev= 7.36, samples=291 write: IOPS=10, BW=41.1KiB/s (42.1kB/s)(6236KiB/151769msec); 0 zone resets clat (msec): min=10, max=1256, avg=59.42, stdev=52.99 lat (msec): min=10, max=1256, avg=59.42, stdev=52.99 clat percentiles (msec): | 1.00th=[ 16], 5.00th=[ 19], 10.00th=[ 22], 20.00th=[ 26], | 30.00th=[ 30], 40.00th=[ 35], 50.00th=[ 43], 60.00th=[ 55], | 70.00th=[ 70], 80.00th=[ 90], 90.00th=[ 118], 95.00th=[ 144], | 99.00th=[ 203], 99.50th=[ 271], 99.90th=[ 355], 99.95th=[ 1250], | 99.99th=[ 1250] bw ( KiB/s): min= 7, max= 127, per=24.91%, avg=41.10, stdev=27.87, samples=296 iops : min= 1, max= 31, avg= 9.63, stdev= 7.02, samples=296 lat (msec) : 10=3.09%, 20=20.25%, 50=42.90%, 100=21.88%, 250=11.43% lat (msec) : 500=0.42%, 2000=0.03% cpu : usr=0.06%, sys=1.79%, ctx=4705, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1513,1559,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=158KiB/s (162kB/s), 39.1KiB/s-39.9KiB/s (40.0kB/s-40.8kB/s), io=23.4MiB (24.6MB), run=151655-152037msec WRITE: bw=165KiB/s (169kB/s), 41.1KiB/s-41.8KiB/s (42.1kB/s-42.8kB/s), io=24.6MiB (25.7MB), run=151655-152037msec 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=180435: Tue Sep 8 00:06:43 2026 read: IOPS=13, BW=211KiB/s (216kB/s)(5920KiB/28031msec) clat (usec): min=35, max=194493, avg=39701.98, stdev=27601.37 lat (usec): min=35, max=194495, avg=39703.13, stdev=27601.28 clat percentiles (usec): | 1.00th=[ 43], 5.00th=[ 59], 10.00th=[ 73], 20.00th=[ 19268], | 30.00th=[ 25560], 40.00th=[ 30802], 50.00th=[ 36963], 60.00th=[ 42206], | 70.00th=[ 49546], 80.00th=[ 57934], 90.00th=[ 72877], 95.00th=[ 89654], | 99.00th=[113771], 99.50th=[158335], 99.90th=[193987], 99.95th=[193987], | 99.99th=[193987] bw ( KiB/s): min= 63, max= 383, per=25.72%, avg=211.18, stdev=81.48, samples=55 iops : min= 3, max= 23, avg=12.40, stdev= 5.18, samples=55 write: IOPS=14, BW=227KiB/s (233kB/s)(6368KiB/28031msec); 0 zone resets clat (usec): min=1472, max=160744, avg=33363.19, stdev=30633.09 lat (usec): min=1473, max=160746, avg=33371.47, stdev=30629.33 clat percentiles (usec): | 1.00th=[ 1647], 5.00th=[ 2343], 10.00th=[ 3687], 20.00th=[ 5932], | 30.00th=[ 9241], 40.00th=[ 17695], 50.00th=[ 25822], 60.00th=[ 32900], | 70.00th=[ 44303], 80.00th=[ 54789], 90.00th=[ 79168], 95.00th=[ 98042], | 99.00th=[131597], 99.50th=[154141], 99.90th=[160433], 99.95th=[160433], | 99.99th=[160433] bw ( KiB/s): min= 61, max= 406, per=26.34%, avg=227.55, stdev=81.65, samples=55 iops : min= 3, max= 25, avg=13.44, stdev= 5.18, samples=55 lat (usec) : 50=1.17%, 100=4.56%, 250=0.13%, 500=0.13%, 1000=0.13% lat (msec) : 2=1.69%, 4=3.91%, 10=10.81%, 20=10.03%, 50=40.36% lat (msec) : 100=23.70%, 250=3.39% cpu : usr=0.08%, sys=6.09%, ctx=1697, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180436: Tue Sep 8 00:06:43 2026 read: IOPS=12, BW=197KiB/s (202kB/s)(5744KiB/29154msec) clat (usec): min=49, max=168217, avg=42464.84, stdev=26643.10 lat (usec): min=50, max=168218, avg=42466.00, stdev=26643.26 clat percentiles (usec): | 1.00th=[ 57], 5.00th=[ 67], 10.00th=[ 11863], 20.00th=[ 22676], | 30.00th=[ 28181], 40.00th=[ 33817], 50.00th=[ 40633], 60.00th=[ 45876], | 70.00th=[ 53216], 80.00th=[ 61080], 90.00th=[ 74974], 95.00th=[ 87557], | 99.00th=[133694], 99.50th=[164627], 99.90th=[168821], 99.95th=[168821], | 99.99th=[168821] bw ( KiB/s): min= 26, max= 378, per=23.83%, avg=195.65, stdev=69.19, samples=57 iops : min= 1, max= 23, avg=11.42, stdev= 4.38, samples=57 write: IOPS=14, BW=224KiB/s (230kB/s)(6544KiB/29154msec); 0 zone resets clat (usec): min=1558, max=227469, avg=33602.99, stdev=33796.31 lat (usec): min=1559, max=227472, avg=33605.12, stdev=33796.39 clat percentiles (usec): | 1.00th=[ 1696], 5.00th=[ 2474], 10.00th=[ 3523], 20.00th=[ 5932], | 30.00th=[ 8717], 40.00th=[ 16319], 50.00th=[ 22938], 60.00th=[ 30278], | 70.00th=[ 41681], 80.00th=[ 58983], 90.00th=[ 83362], 95.00th=[102237], | 99.00th=[135267], 99.50th=[168821], 99.90th=[227541], 99.95th=[227541], | 99.99th=[227541] bw ( KiB/s): min= 31, max= 478, per=25.82%, avg=223.09, stdev=90.10, samples=57 iops : min= 1, max= 29, avg=13.16, stdev= 5.67, samples=57 lat (usec) : 50=0.13%, 100=3.52%, 250=0.78%, 750=0.13% lat (msec) : 2=1.69%, 4=4.69%, 10=11.20%, 20=9.77%, 50=38.41% lat (msec) : 100=25.78%, 250=3.91% cpu : usr=0.04%, sys=6.16%, ctx=1744, 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=180437: Tue Sep 8 00:06:43 2026 read: IOPS=13, BW=216KiB/s (221kB/s)(6256KiB/29015msec) clat (usec): min=39, max=152392, avg=40471.45, stdev=27119.19 lat (usec): min=39, max=152393, avg=40473.47, stdev=27118.70 clat percentiles (usec): | 1.00th=[ 51], 5.00th=[ 73], 10.00th=[ 6587], 20.00th=[ 20317], | 30.00th=[ 24773], 40.00th=[ 30540], 50.00th=[ 35914], 60.00th=[ 42730], | 70.00th=[ 50070], 80.00th=[ 58459], 90.00th=[ 78119], 95.00th=[ 93848], | 99.00th=[122160], 99.50th=[141558], 99.90th=[152044], 99.95th=[152044], | 99.99th=[152044] bw ( KiB/s): min= 63, max= 381, per=26.24%, avg=215.42, stdev=75.58, samples=57 iops : min= 3, max= 23, avg=12.67, stdev= 4.76, samples=57 write: IOPS=12, BW=208KiB/s (213kB/s)(6032KiB/29015msec); 0 zone resets clat (usec): min=1480, max=156967, avg=34686.35, stdev=33133.06 lat (usec): min=1481, max=156968, avg=34704.81, stdev=33126.34 clat percentiles (usec): | 1.00th=[ 1614], 5.00th=[ 1926], 10.00th=[ 3195], 20.00th=[ 5407], | 30.00th=[ 10159], 40.00th=[ 16188], 50.00th=[ 26346], 60.00th=[ 34341], | 70.00th=[ 45876], 80.00th=[ 57934], 90.00th=[ 79168], 95.00th=[ 96994], | 99.00th=[152044], 99.50th=[156238], 99.90th=[156238], 99.95th=[156238], | 99.99th=[156238] bw ( KiB/s): min= 62, max= 414, per=23.62%, avg=204.11, stdev=78.75, samples=57 iops : min= 3, max= 25, avg=11.96, stdev= 4.98, samples=57 lat (usec) : 50=0.39%, 100=3.65%, 250=0.52%, 500=0.26%, 1000=0.13% lat (msec) : 2=2.86%, 4=3.91%, 10=8.07%, 20=11.20%, 50=40.36% lat (msec) : 100=24.74%, 250=3.91% cpu : usr=0.07%, sys=6.03%, ctx=1793, 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=180438: Tue Sep 8 00:06:43 2026 read: IOPS=13, BW=215KiB/s (220kB/s)(6032KiB/28057msec) clat (usec): min=38, max=163976, avg=40458.02, stdev=26995.67 lat (usec): min=39, max=163977, avg=40459.10, stdev=26995.67 clat percentiles (usec): | 1.00th=[ 45], 5.00th=[ 60], 10.00th=[ 78], 20.00th=[ 19792], | 30.00th=[ 27395], 40.00th=[ 33424], 50.00th=[ 38011], 60.00th=[ 45351], | 70.00th=[ 51643], 80.00th=[ 58459], 90.00th=[ 74974], 95.00th=[ 84411], | 99.00th=[130548], 99.50th=[156238], 99.90th=[164627], 99.95th=[164627], | 99.99th=[164627] bw ( KiB/s): min= 63, max= 378, per=25.93%, avg=212.87, stdev=71.86, samples=55 iops : min= 3, max= 23, avg=12.51, stdev= 4.56, samples=55 write: IOPS=13, BW=223KiB/s (228kB/s)(6256KiB/28057msec); 0 zone resets clat (usec): min=1437, max=164489, avg=32432.10, stdev=31548.27 lat (usec): min=1439, max=164491, avg=32437.46, stdev=31547.05 clat percentiles (usec): | 1.00th=[ 1532], 5.00th=[ 2089], 10.00th=[ 3458], 20.00th=[ 5473], | 30.00th=[ 8717], 40.00th=[ 15139], 50.00th=[ 23200], 60.00th=[ 32113], | 70.00th=[ 40633], 80.00th=[ 55837], 90.00th=[ 79168], 95.00th=[ 93848], | 99.00th=[139461], 99.50th=[164627], 99.90th=[164627], 99.95th=[164627], | 99.99th=[164627] bw ( KiB/s): min= 94, max= 352, per=25.81%, avg=223.04, stdev=72.26, samples=55 iops : min= 5, max= 22, avg=13.16, stdev= 4.58, samples=55 lat (usec) : 50=0.78%, 100=4.82%, 250=0.91%, 1000=0.13% lat (msec) : 2=2.47%, 4=4.17%, 10=9.90%, 20=10.29%, 50=38.80% lat (msec) : 100=24.74%, 250=2.99% cpu : usr=0.05%, sys=6.22%, ctx=1641, 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=822KiB/s (841kB/s), 197KiB/s-216KiB/s (202kB/s-221kB/s), io=23.4MiB (24.5MB), run=28031-29154msec WRITE: bw=864KiB/s (885kB/s), 208KiB/s-227KiB/s (213kB/s-233kB/s), io=24.6MiB (25.8MB), run=28031-29154msec rand-rw: (groupid=0, jobs=1): err= 0: pid=180440: Tue Sep 8 00:06:53 2026 read: IOPS=9, BW=151KiB/s (154kB/s)(5920KiB/39314msec) clat (msec): min=6, max=236, avg=41.78, stdev=37.31 lat (msec): min=6, max=236, avg=41.78, stdev=37.31 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 12], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 20], 40.00th=[ 24], 50.00th=[ 28], 60.00th=[ 33], | 70.00th=[ 40], 80.00th=[ 63], 90.00th=[ 100], 95.00th=[ 118], | 99.00th=[ 186], 99.50th=[ 209], 99.90th=[ 236], 99.95th=[ 236], | 99.99th=[ 236] bw ( KiB/s): min= 31, max= 416, per=24.12%, avg=146.88, stdev=87.73, samples=77 iops : min= 1, max= 26, avg= 8.43, stdev= 5.62, samples=77 write: IOPS=10, BW=162KiB/s (166kB/s)(6368KiB/39314msec); 0 zone resets clat (msec): min=12, max=248, avg=59.28, stdev=37.89 lat (msec): min=12, max=248, avg=59.28, stdev=37.89 clat percentiles (msec): | 1.00th=[ 16], 5.00th=[ 22], 10.00th=[ 25], 20.00th=[ 30], | 30.00th=[ 34], 40.00th=[ 42], 50.00th=[ 47], 60.00th=[ 56], | 70.00th=[ 67], 80.00th=[ 87], 90.00th=[ 114], 95.00th=[ 142], | 99.00th=[ 182], 99.50th=[ 241], 99.90th=[ 249], 99.95th=[ 249], | 99.99th=[ 249] bw ( KiB/s): min= 31, max= 384, per=24.98%, avg=159.86, stdev=89.21, samples=77 iops : min= 1, max= 24, avg= 9.25, stdev= 5.67, samples=77 lat (msec) : 10=1.69%, 20=15.23%, 50=47.14%, 100=23.96%, 250=11.98% cpu : usr=0.05%, sys=1.90%, ctx=1218, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180441: Tue Sep 8 00:06:53 2026 read: IOPS=9, BW=146KiB/s (150kB/s)(5744KiB/39218msec) clat (msec): min=6, max=248, avg=40.63, stdev=37.16 lat (msec): min=6, max=248, avg=40.64, stdev=37.16 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 20], 40.00th=[ 24], 50.00th=[ 28], 60.00th=[ 34], | 70.00th=[ 41], 80.00th=[ 55], 90.00th=[ 89], 95.00th=[ 123], | 99.00th=[ 192], 99.50th=[ 239], 99.90th=[ 249], 99.95th=[ 249], | 99.99th=[ 249] bw ( KiB/s): min= 27, max= 384, per=23.85%, avg=145.27, stdev=97.28, samples=77 iops : min= 1, max= 24, avg= 8.31, stdev= 6.18, samples=77 write: IOPS=10, BW=167KiB/s (171kB/s)(6544KiB/39218msec); 0 zone resets clat (msec): min=12, max=264, avg=60.04, stdev=37.87 lat (msec): min=12, max=264, avg=60.04, stdev=37.87 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 22], 10.00th=[ 25], 20.00th=[ 31], | 30.00th=[ 35], 40.00th=[ 41], 50.00th=[ 47], 60.00th=[ 57], | 70.00th=[ 74], 80.00th=[ 88], 90.00th=[ 110], 95.00th=[ 134], | 99.00th=[ 176], 99.50th=[ 203], 99.90th=[ 266], 99.95th=[ 266], | 99.99th=[ 266] bw ( KiB/s): min= 31, max= 384, per=25.85%, avg=165.45, stdev=88.05, samples=77 iops : min= 1, max= 24, avg= 9.60, stdev= 5.62, samples=77 lat (msec) : 10=2.08%, 20=14.45%, 50=48.70%, 100=23.57%, 250=10.94% lat (msec) : 500=0.26% cpu : usr=0.06%, sys=1.89%, ctx=1187, 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=180442: Tue Sep 8 00:06:53 2026 read: IOPS=10, BW=160KiB/s (164kB/s)(6256KiB/39039msec) clat (msec): min=6, max=255, avg=41.93, stdev=38.91 lat (msec): min=6, max=255, avg=41.93, stdev=38.91 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 14], 20.00th=[ 18], | 30.00th=[ 21], 40.00th=[ 24], 50.00th=[ 28], 60.00th=[ 34], | 70.00th=[ 42], 80.00th=[ 57], 90.00th=[ 100], 95.00th=[ 133], | 99.00th=[ 201], 99.50th=[ 224], 99.90th=[ 255], 99.95th=[ 255], | 99.99th=[ 255] bw ( KiB/s): min= 31, max= 478, per=26.39%, avg=160.70, stdev=103.11, samples=77 iops : min= 1, max= 29, avg= 9.30, stdev= 6.50, samples=77 write: IOPS=9, BW=155KiB/s (158kB/s)(6032KiB/39039msec); 0 zone resets clat (msec): min=13, max=209, avg=59.62, stdev=37.20 lat (msec): min=13, max=209, avg=59.63, stdev=37.20 clat percentiles (msec): | 1.00th=[ 15], 5.00th=[ 21], 10.00th=[ 24], 20.00th=[ 30], | 30.00th=[ 36], 40.00th=[ 41], 50.00th=[ 47], 60.00th=[ 58], | 70.00th=[ 71], 80.00th=[ 88], 90.00th=[ 117], 95.00th=[ 138], | 99.00th=[ 184], 99.50th=[ 201], 99.90th=[ 209], 99.95th=[ 209], | 99.99th=[ 209] bw ( KiB/s): min= 31, max= 448, per=24.64%, avg=157.71, stdev=85.96, samples=75 iops : min= 1, max= 28, avg= 9.12, stdev= 5.54, samples=75 lat (msec) : 10=1.17%, 20=16.15%, 50=48.83%, 100=22.14%, 250=11.59% lat (msec) : 500=0.13% cpu : usr=0.05%, sys=1.91%, ctx=1243, 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=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=180443: Tue Sep 8 00:06:53 2026 read: IOPS=9, BW=154KiB/s (157kB/s)(6032KiB/39225msec) clat (msec): min=7, max=252, avg=40.62, stdev=35.66 lat (msec): min=7, max=252, avg=40.62, stdev=35.66 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 14], 20.00th=[ 18], | 30.00th=[ 21], 40.00th=[ 24], 50.00th=[ 29], 60.00th=[ 36], | 70.00th=[ 43], 80.00th=[ 56], 90.00th=[ 83], 95.00th=[ 116], | 99.00th=[ 186], 99.50th=[ 234], 99.90th=[ 253], 99.95th=[ 253], | 99.99th=[ 253] bw ( KiB/s): min= 31, max= 416, per=25.58%, avg=155.77, stdev=90.15, samples=75 iops : min= 1, max= 26, avg= 8.99, stdev= 5.76, samples=75 write: IOPS=9, BW=159KiB/s (163kB/s)(6256KiB/39225msec); 0 zone resets clat (msec): min=15, max=264, avg=60.58, stdev=40.19 lat (msec): min=15, max=264, avg=60.59, stdev=40.19 clat percentiles (msec): | 1.00th=[ 18], 5.00th=[ 23], 10.00th=[ 26], 20.00th=[ 29], | 30.00th=[ 34], 40.00th=[ 40], 50.00th=[ 47], 60.00th=[ 55], | 70.00th=[ 69], 80.00th=[ 91], 90.00th=[ 121], 95.00th=[ 140], | 99.00th=[ 207], 99.50th=[ 243], 99.90th=[ 266], 99.95th=[ 266], | 99.99th=[ 266] bw ( KiB/s): min= 31, max= 444, per=24.71%, avg=158.13, stdev=94.05, samples=77 iops : min= 1, max= 27, avg= 9.14, stdev= 5.99, samples=77 lat (msec) : 10=1.82%, 20=13.41%, 50=50.52%, 100=22.79%, 250=11.20% lat (msec) : 500=0.26% cpu : usr=0.04%, sys=1.96%, ctx=1207, 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=609KiB/s (624kB/s), 146KiB/s-160KiB/s (150kB/s-164kB/s), io=23.4MiB (24.5MB), run=39039-39314msec WRITE: bw=641KiB/s (656kB/s), 155KiB/s-167KiB/s (158kB/s-171kB/s), io=24.6MiB (25.8MB), run=39039-39314msec 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=180455: Tue Sep 8 00:07:10 2026 read: IOPS=1, BW=1058KiB/s (1084kB/s)(7168KiB/6773msec) clat (usec): min=719, max=234962, avg=148435.59, stdev=102052.48 lat (usec): min=720, max=234963, avg=148436.88, stdev=102052.37 clat percentiles (usec): | 1.00th=[ 717], 5.00th=[ 717], 10.00th=[ 717], 20.00th=[ 5997], | 30.00th=[158335], 40.00th=[158335], 50.00th=[200279], 60.00th=[219153], | 70.00th=[219153], 80.00th=[219153], 90.00th=[235930], 95.00th=[235930], | 99.00th=[235930], 99.50th=[235930], 99.90th=[235930], 99.95th=[235930], | 99.99th=[235930] bw ( KiB/s): min= 2031, max= 4055, per=100.00%, avg=3174.00, stdev=1037.12, samples=3 iops : min= 1, max= 3, avg= 2.33, stdev= 1.15, samples=3 write: IOPS=0, BW=756KiB/s (774kB/s)(5120KiB/6773msec); 0 zone resets clat (msec): min=210, max=2948, avg=1131.75, stdev=1178.26 lat (msec): min=210, max=2949, avg=1131.85, stdev=1178.32 clat percentiles (msec): | 1.00th=[ 211], 5.00th=[ 211], 10.00th=[ 211], 20.00th=[ 211], | 30.00th=[ 376], 40.00th=[ 376], 50.00th=[ 422], 60.00th=[ 422], | 70.00th=[ 1703], 80.00th=[ 1703], 90.00th=[ 2937], 95.00th=[ 2937], | 99.00th=[ 2937], 99.50th=[ 2937], 99.90th=[ 2937], 99.95th=[ 2937], | 99.99th=[ 2937] bw ( KiB/s): min= 1622, max= 2048, per=49.69%, avg=1899.00, stdev=240.12, samples=3 iops : min= 1, max= 2, avg= 1.33, stdev= 0.58, samples=3 lat (usec) : 750=8.33% lat (msec) : 10=8.33%, 250=50.00%, 500=16.67%, 2000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=7.72%, ctx=150, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=7,5,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180456: Tue Sep 8 00:07:10 2026 read: IOPS=0, BW=273KiB/s (280kB/s)(2048KiB/7501msec) clat (msec): min=263, max=3407, avg=1835.45, stdev=2222.87 lat (msec): min=263, max=3407, avg=1835.46, stdev=2222.87 clat percentiles (msec): | 1.00th=[ 264], 5.00th=[ 264], 10.00th=[ 264], 20.00th=[ 264], | 30.00th=[ 264], 40.00th=[ 264], 50.00th=[ 264], 60.00th=[ 3406], | 70.00th=[ 3406], 80.00th=[ 3406], 90.00th=[ 3406], 95.00th=[ 3406], | 99.00th=[ 3406], 99.50th=[ 3406], 99.90th=[ 3406], 99.95th=[ 3406], | 99.99th=[ 3406] bw ( KiB/s): min= 2015, max= 2048, per=74.41%, avg=2031.50, stdev=23.33, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 write: IOPS=1, BW=1365KiB/s (1398kB/s)(10.0MiB/7501msec); 0 zone resets clat (msec): min=87, max=1512, avg=376.91, stdev=427.79 lat (msec): min=87, max=1512, avg=378.85, stdev=427.98 clat percentiles (msec): | 1.00th=[ 88], 5.00th=[ 88], 10.00th=[ 88], 20.00th=[ 89], | 30.00th=[ 159], 40.00th=[ 161], 50.00th=[ 218], 60.00th=[ 241], | 70.00th=[ 271], 80.00th=[ 514], 90.00th=[ 523], 95.00th=[ 1519], | 99.00th=[ 1519], 99.50th=[ 1519], 99.90th=[ 1519], 99.95th=[ 1519], | 99.99th=[ 1519] bw ( KiB/s): min= 1872, max= 6047, per=78.77%, avg=3010.67, stdev=1700.58, samples=6 iops : min= 1, max= 5, avg= 2.17, stdev= 1.60, samples=6 lat (msec) : 100=16.67%, 250=33.33%, 500=16.67%, 750=16.67%, 2000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=8.88%, ctx=597, 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=180457: Tue Sep 8 00:07:10 2026 read: IOPS=0, BW=999KiB/s (1023kB/s)(6144KiB/6153msec) clat (usec): min=1079, max=397406, avg=105998.56, stdev=169290.03 lat (usec): min=1080, max=397407, avg=105999.67, stdev=169289.86 clat percentiles (usec): | 1.00th=[ 1074], 5.00th=[ 1074], 10.00th=[ 1074], 20.00th=[ 1385], | 30.00th=[ 1385], 40.00th=[ 1663], 50.00th=[ 1663], 60.00th=[ 4817], | 70.00th=[229639], 80.00th=[229639], 90.00th=[396362], 95.00th=[396362], | 99.00th=[396362], 99.50th=[396362], 99.90th=[396362], 99.95th=[396362], | 99.99th=[396362] bw ( KiB/s): min= 2023, max= 3744, per=100.00%, avg=3004.00, stdev=885.45, samples=3 iops : min= 1, max= 3, avg= 2.33, stdev= 1.15, samples=3 write: IOPS=0, BW=999KiB/s (1023kB/s)(6144KiB/6153msec); 0 zone resets clat (msec): min=91, max=3731, avg=881.55, stdev=1403.70 lat (msec): min=91, max=3731, avg=881.62, stdev=1403.70 clat percentiles (msec): | 1.00th=[ 92], 5.00th=[ 92], 10.00th=[ 92], 20.00th=[ 288], | 30.00th=[ 288], 40.00th=[ 300], 50.00th=[ 300], 60.00th=[ 338], | 70.00th=[ 542], 80.00th=[ 542], 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= 1622, max= 4055, per=62.61%, avg=2393.00, stdev=1120.27, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 lat (msec) : 2=25.00%, 10=8.33%, 100=8.33%, 250=8.33%, 500=33.33% lat (msec) : 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=6.96%, ctx=131, 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=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=180458: Tue Sep 8 00:07:10 2026 read: IOPS=0, BW=746KiB/s (764kB/s)(5120KiB/6862msec) clat (usec): min=553, max=437117, avg=198788.43, stdev=209260.46 lat (usec): min=554, max=437118, avg=198789.49, stdev=209260.29 clat percentiles (usec): | 1.00th=[ 553], 5.00th=[ 553], 10.00th=[ 553], 20.00th=[ 553], | 30.00th=[ 8455], 40.00th=[ 8455], 50.00th=[147850], 60.00th=[147850], | 70.00th=[400557], 80.00th=[400557], 90.00th=[438305], 95.00th=[438305], | 99.00th=[438305], 99.50th=[438305], 99.90th=[438305], 99.95th=[438305], | 99.99th=[438305] bw ( KiB/s): min= 2023, max= 5616, per=100.00%, avg=3819.50, stdev=2540.63, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 write: IOPS=1, BW=1045KiB/s (1070kB/s)(7168KiB/6862msec); 0 zone resets clat (msec): min=184, max=3811, avg=820.77, stdev=1326.46 lat (msec): min=184, max=3811, avg=820.85, stdev=1326.46 clat percentiles (msec): | 1.00th=[ 184], 5.00th=[ 184], 10.00th=[ 184], 20.00th=[ 226], | 30.00th=[ 292], 40.00th=[ 292], 50.00th=[ 300], 60.00th=[ 305], | 70.00th=[ 305], 80.00th=[ 625], 90.00th=[ 3809], 95.00th=[ 3809], | 99.00th=[ 3809], 99.50th=[ 3809], 99.90th=[ 3809], 99.95th=[ 3809], | 99.99th=[ 3809] bw ( KiB/s): min= 2027, max= 4868, per=71.81%, avg=2744.50, stdev=1415.69, samples=4 iops : min= 1, max= 4, avg= 2.00, stdev= 1.41, samples=4 lat (usec) : 750=8.33% lat (msec) : 10=8.33%, 250=25.00%, 500=41.67%, 750=8.33%, >=2000=8.33% cpu : usr=0.03%, sys=7.45%, ctx=198, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=2730KiB/s (2796kB/s), 273KiB/s-1058KiB/s (280kB/s-1084kB/s), io=20.0MiB (20.0MB), run=6153-7501msec WRITE: bw=3822KiB/s (3914kB/s), 756KiB/s-1365KiB/s (774kB/s-1398kB/s), io=28.0MiB (29.4MB), run=6153-7501msec rand-rw: (groupid=0, jobs=1): err= 0: pid=180459: Tue Sep 8 00:07:11 2026 read: IOPS=0, BW=965KiB/s (988kB/s)(7168KiB/7429msec) clat (msec): min=68, max=625, avg=215.37, stdev=192.72 lat (msec): min=68, max=625, avg=215.37, stdev=192.72 clat percentiles (msec): | 1.00th=[ 68], 5.00th=[ 68], 10.00th=[ 68], 20.00th=[ 86], | 30.00th=[ 91], 40.00th=[ 91], 50.00th=[ 209], 60.00th=[ 209], | 70.00th=[ 209], 80.00th=[ 220], 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= 1462, max= 4096, per=91.79%, avg=2302.00, stdev=1029.08, samples=5 iops : min= 1, max= 4, avg= 1.60, stdev= 1.34, samples=5 write: IOPS=0, BW=689KiB/s (706kB/s)(5120KiB/7429msec); 0 zone resets clat (msec): min=194, max=3131, avg=1110.42, stdev=1183.57 lat (msec): min=194, max=3131, avg=1110.70, stdev=1183.43 clat percentiles (msec): | 1.00th=[ 194], 5.00th=[ 194], 10.00th=[ 194], 20.00th=[ 194], | 30.00th=[ 368], 40.00th=[ 368], 50.00th=[ 760], 60.00th=[ 760], | 70.00th=[ 1099], 80.00th=[ 1099], 90.00th=[ 3138], 95.00th=[ 3138], | 99.00th=[ 3138], 99.50th=[ 3138], 99.90th=[ 3138], 99.95th=[ 3138], | 99.99th=[ 3138] bw ( KiB/s): min= 2007, max= 2035, per=57.49%, avg=2019.00, stdev=12.65, samples=4 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=4 lat (msec) : 100=25.00%, 250=33.33%, 500=8.33%, 750=8.33%, 1000=8.33% lat (msec) : 2000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=3.38%, ctx=112, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=7,5,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180460: Tue Sep 8 00:07:11 2026 read: IOPS=0, BW=257KiB/s (263kB/s)(2048KiB/7976msec) clat (msec): min=128, max=181, avg=154.56, stdev=37.40 lat (msec): min=128, max=181, avg=154.56, stdev=37.40 clat percentiles (msec): | 1.00th=[ 129], 5.00th=[ 129], 10.00th=[ 129], 20.00th=[ 129], | 30.00th=[ 129], 40.00th=[ 129], 50.00th=[ 129], 60.00th=[ 182], | 70.00th=[ 182], 80.00th=[ 182], 90.00th=[ 182], 95.00th=[ 182], | 99.00th=[ 182], 99.50th=[ 182], 99.90th=[ 182], 99.95th=[ 182], | 99.99th=[ 182] bw ( KiB/s): min= 1395, max= 2035, per=68.38%, avg=1715.00, stdev=452.55, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1284KiB/s (1315kB/s)(10.0MiB/7976msec); 0 zone resets clat (msec): min=91, max=4789, avg=764.29, stdev=1435.59 lat (msec): min=91, max=4789, avg=764.38, stdev=1435.58 clat percentiles (msec): | 1.00th=[ 92], 5.00th=[ 92], 10.00th=[ 92], 20.00th=[ 120], | 30.00th=[ 125], 40.00th=[ 144], 50.00th=[ 180], 60.00th=[ 342], | 70.00th=[ 384], 80.00th=[ 634], 90.00th=[ 835], 95.00th=[ 4799], | 99.00th=[ 4799], 99.50th=[ 4799], 99.90th=[ 4799], 99.95th=[ 4799], | 99.99th=[ 4799] bw ( KiB/s): min= 2023, max= 6107, per=100.00%, avg=3654.40, stdev=1700.49, samples=5 iops : min= 1, max= 5, avg= 2.80, stdev= 1.48, samples=5 lat (msec) : 100=8.33%, 250=50.00%, 500=16.67%, 750=8.33%, 1000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.01%, sys=2.81%, ctx=150, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=2,10,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180461: Tue Sep 8 00:07:11 2026 read: IOPS=0, BW=797KiB/s (816kB/s)(6144KiB/7710msec) clat (msec): min=64, max=646, avg=224.59, stdev=226.70 lat (msec): min=64, max=646, avg=224.59, stdev=226.70 clat percentiles (msec): | 1.00th=[ 65], 5.00th=[ 65], 10.00th=[ 65], 20.00th=[ 73], | 30.00th=[ 73], 40.00th=[ 94], 50.00th=[ 94], 60.00th=[ 155], | 70.00th=[ 313], 80.00th=[ 313], 90.00th=[ 651], 95.00th=[ 651], | 99.00th=[ 651], 99.50th=[ 651], 99.90th=[ 651], 99.95th=[ 651], | 99.99th=[ 651] bw ( KiB/s): min= 2011, max= 4071, per=100.00%, avg=2710.00, stdev=1178.81, samples=3 iops : min= 1, max= 3, avg= 2.00, stdev= 1.00, samples=3 write: IOPS=0, BW=797KiB/s (816kB/s)(6144KiB/7710msec); 0 zone resets clat (msec): min=127, max=4020, avg=1024.59, stdev=1488.89 lat (msec): min=127, max=4020, avg=1026.14, stdev=1488.34 clat percentiles (msec): | 1.00th=[ 128], 5.00th=[ 128], 10.00th=[ 128], 20.00th=[ 251], | 30.00th=[ 251], 40.00th=[ 347], 50.00th=[ 347], 60.00th=[ 567], | 70.00th=[ 835], 80.00th=[ 835], 90.00th=[ 4010], 95.00th=[ 4010], | 99.00th=[ 4010], 99.50th=[ 4010], 99.90th=[ 4010], 99.95th=[ 4010], | 99.99th=[ 4010] bw ( KiB/s): min= 1910, max= 2039, per=57.00%, avg=2001.75, stdev=61.54, samples=4 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=4 lat (msec) : 100=25.00%, 250=16.67%, 500=25.00%, 750=16.67%, 1000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.01%, sys=2.59%, ctx=109, 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=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=180462: Tue Sep 8 00:07:11 2026 read: IOPS=0, BW=627KiB/s (642kB/s)(5120KiB/8163msec) clat (msec): min=107, max=462, avg=224.20, stdev=140.08 lat (msec): min=107, max=462, avg=224.20, stdev=140.08 clat percentiles (msec): | 1.00th=[ 108], 5.00th=[ 108], 10.00th=[ 108], 20.00th=[ 108], | 30.00th=[ 140], 40.00th=[ 140], 50.00th=[ 199], 60.00th=[ 199], | 70.00th=[ 211], 80.00th=[ 211], 90.00th=[ 464], 95.00th=[ 464], | 99.00th=[ 464], 99.50th=[ 464], 99.90th=[ 464], 99.95th=[ 464], | 99.99th=[ 464] bw ( KiB/s): min= 2035, max= 6107, per=100.00%, avg=4071.00, stdev=2879.34, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 write: IOPS=0, BW=878KiB/s (899kB/s)(7168KiB/8163msec); 0 zone resets clat (msec): min=72, max=5442, avg=976.97, stdev=1975.35 lat (msec): min=72, max=5442, avg=977.06, stdev=1975.35 clat percentiles (msec): | 1.00th=[ 73], 5.00th=[ 73], 10.00th=[ 73], 20.00th=[ 136], | 30.00th=[ 144], 40.00th=[ 144], 50.00th=[ 161], 60.00th=[ 363], | 70.00th=[ 363], 80.00th=[ 523], 90.00th=[ 5470], 95.00th=[ 5470], | 99.00th=[ 5470], 99.50th=[ 5470], 99.90th=[ 5470], 99.95th=[ 5470], | 99.99th=[ 5470] bw ( KiB/s): min= 2023, max= 4023, per=76.82%, avg=2698.00, stdev=1147.55, samples=3 iops : min= 1, max= 3, avg= 2.00, stdev= 1.00, samples=3 lat (msec) : 100=8.33%, 250=58.33%, 500=16.67%, 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=3.05%, ctx=107, 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=2509KiB/s (2569kB/s), 257KiB/s-965KiB/s (263kB/s-988kB/s), io=20.0MiB (20.0MB), run=7429-8163msec WRITE: bw=3512KiB/s (3597kB/s), 689KiB/s-1284KiB/s (706kB/s-1315kB/s), io=28.0MiB (29.4MB), run=7429-8163msec 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=180469: Tue Sep 8 00:07:24 2026 read: IOPS=1, BW=5176KiB/s (5300kB/s)(12.0MiB/2374msec) clat (msec): min=746, max=841, avg=786.65, stdev=49.46 lat (msec): min=746, max=842, avg=786.78, stdev=49.68 clat percentiles (msec): | 1.00th=[ 743], 5.00th=[ 743], 10.00th=[ 743], 20.00th=[ 743], | 30.00th=[ 743], 40.00th=[ 776], 50.00th=[ 776], 60.00th=[ 776], | 70.00th=[ 844], 80.00th=[ 844], 90.00th=[ 844], 95.00th=[ 844], | 99.00th=[ 844], 99.50th=[ 844], 99.90th=[ 844], 99.95th=[ 844], | 99.99th=[ 844] bw ( KiB/s): min= 8159, max= 8175, per=100.00%, avg=8167.00, stdev=11.31, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=33.33%, 1000=66.67% cpu : usr=0.00%, sys=13.19%, ctx=260, 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=180470: Tue Sep 8 00:07:24 2026 read: IOPS=0, BW=1458KiB/s (1493kB/s)(4096KiB/2809msec) clat (nsec): min=849317k, max=849317k, avg=849316927.00, stdev= 0.00 lat (nsec): min=849319k, max=849319k, avg=849319064.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 852], 5.00th=[ 852], 10.00th=[ 852], 20.00th=[ 852], | 30.00th=[ 852], 40.00th=[ 852], 50.00th=[ 852], 60.00th=[ 852], | 70.00th=[ 852], 80.00th=[ 852], 90.00th=[ 852], 95.00th=[ 852], | 99.00th=[ 852], 99.50th=[ 852], 99.90th=[ 852], 99.95th=[ 852], | 99.99th=[ 852] 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=2916KiB/s (2986kB/s)(8192KiB/2809msec); 0 zone resets clat (msec): min=873, max=1057, avg=965.59, stdev=130.42 lat (msec): min=873, max=1058, avg=965.94, stdev=130.37 clat percentiles (msec): | 1.00th=[ 877], 5.00th=[ 877], 10.00th=[ 877], 20.00th=[ 877], | 30.00th=[ 877], 40.00th=[ 877], 50.00th=[ 877], 60.00th=[ 1062], | 70.00th=[ 1062], 80.00th=[ 1062], 90.00th=[ 1062], 95.00th=[ 1062], | 99.00th=[ 1062], 99.50th=[ 1062], 99.90th=[ 1062], 99.95th=[ 1062], | 99.99th=[ 1062] bw ( KiB/s): min= 7968, max= 7968, per=71.78%, avg=7968.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 1000=66.67%, 2000=33.33% cpu : usr=0.00%, sys=4.95%, ctx=79, 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=180471: Tue Sep 8 00:07:24 2026 write: IOPS=1, BW=4163KiB/s (4263kB/s)(12.0MiB/2952msec); 0 zone resets clat (msec): min=387, max=1525, avg=974.85, stdev=569.99 lat (msec): min=387, max=1525, avg=975.21, stdev=569.99 clat percentiles (msec): | 1.00th=[ 388], 5.00th=[ 388], 10.00th=[ 388], 20.00th=[ 388], | 30.00th=[ 388], 40.00th=[ 1011], 50.00th=[ 1011], 60.00th=[ 1011], | 70.00th=[ 1519], 80.00th=[ 1519], 90.00th=[ 1519], 95.00th=[ 1519], | 99.00th=[ 1519], 99.50th=[ 1519], 99.90th=[ 1519], 99.95th=[ 1519], | 99.99th=[ 1519] bw ( KiB/s): min= 8159, max= 8175, per=73.58%, avg=8167.00, stdev=11.31, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 2000=66.67% cpu : usr=0.00%, sys=7.73%, ctx=79, 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=180472: Tue Sep 8 00:07:24 2026 write: IOPS=1, BW=4965KiB/s (5084kB/s)(12.0MiB/2475msec); 0 zone resets clat (msec): min=307, max=1465, avg=811.48, stdev=592.99 lat (msec): min=309, max=1465, avg=812.56, stdev=592.30 clat percentiles (msec): | 1.00th=[ 309], 5.00th=[ 309], 10.00th=[ 309], 20.00th=[ 309], | 30.00th=[ 309], 40.00th=[ 659], 50.00th=[ 659], 60.00th=[ 659], | 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=16351, max=16351, per=100.00%, avg=16351.00, stdev= 0.00, samples=1 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 750=33.33%, 2000=33.33% cpu : usr=0.04%, sys=5.21%, ctx=52, 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=5833KiB/s (5973kB/s), 1458KiB/s-5176KiB/s (1493kB/s-5300kB/s), io=16.0MiB (16.8MB), run=2374-2809msec WRITE: bw=10.8MiB/s (11.4MB/s), 2916KiB/s-4965KiB/s (2986kB/s-5084kB/s), io=32.0MiB (33.6MB), run=2475-2952msec rand-rw: (groupid=0, jobs=1): err= 0: pid=180474: Tue Sep 8 00:07:24 2026 read: IOPS=1, BW=5024KiB/s (5144kB/s)(12.0MiB/2446msec) clat (msec): min=295, max=1085, avg=814.88, stdev=450.05 lat (msec): min=295, max=1085, avg=814.89, stdev=450.05 clat percentiles (msec): | 1.00th=[ 296], 5.00th=[ 296], 10.00th=[ 296], 20.00th=[ 296], | 30.00th=[ 296], 40.00th=[ 1062], 50.00th=[ 1062], 60.00th=[ 1062], | 70.00th=[ 1083], 80.00th=[ 1083], 90.00th=[ 1083], 95.00th=[ 1083], | 99.00th=[ 1083], 99.50th=[ 1083], 99.90th=[ 1083], 99.95th=[ 1083], | 99.99th=[ 1083] bw ( KiB/s): min= 7968, max= 8126, per=100.00%, avg=8047.00, stdev=111.72, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 2000=66.67% cpu : usr=0.00%, sys=4.87%, ctx=78, 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=180475: Tue Sep 8 00:07:24 2026 read: IOPS=0, BW=1445KiB/s (1480kB/s)(4096KiB/2834msec) clat (nsec): min=1384.0M, max=1384.0M, avg=1384953994.00, stdev= 0.00 lat (nsec): min=1384.0M, max=1384.0M, avg=1384956037.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1385], 5.00th=[ 1385], 10.00th=[ 1385], 20.00th=[ 1385], | 30.00th=[ 1385], 40.00th=[ 1385], 50.00th=[ 1385], 60.00th=[ 1385], | 70.00th=[ 1385], 80.00th=[ 1385], 90.00th=[ 1385], 95.00th=[ 1385], | 99.00th=[ 1385], 99.50th=[ 1385], 99.90th=[ 1385], 99.95th=[ 1385], | 99.99th=[ 1385] bw ( KiB/s): min= 8110, max= 8110, per=100.00%, avg=8110.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2891KiB/s (2960kB/s)(8192KiB/2834msec); 0 zone resets clat (msec): min=627, max=817, avg=722.58, stdev=133.77 lat (msec): min=628, max=818, avg=723.63, stdev=134.73 clat percentiles (msec): | 1.00th=[ 625], 5.00th=[ 625], 10.00th=[ 625], 20.00th=[ 625], | 30.00th=[ 625], 40.00th=[ 625], 50.00th=[ 625], 60.00th=[ 818], | 70.00th=[ 818], 80.00th=[ 818], 90.00th=[ 818], 95.00th=[ 818], | 99.00th=[ 818], 99.50th=[ 818], 99.90th=[ 818], 99.95th=[ 818], | 99.99th=[ 818] bw ( KiB/s): min= 7968, max= 7968, per=68.92%, avg=7968.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 750=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=4.09%, ctx=99, 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=180476: Tue Sep 8 00:07:24 2026 write: IOPS=1, BW=4438KiB/s (4544kB/s)(12.0MiB/2769msec); 0 zone resets clat (msec): min=176, max=1800, avg=921.10, stdev=820.11 lat (msec): min=176, max=1803, avg=922.32, stdev=821.53 clat percentiles (msec): | 1.00th=[ 178], 5.00th=[ 178], 10.00th=[ 178], 20.00th=[ 178], | 30.00th=[ 178], 40.00th=[ 785], 50.00th=[ 785], 60.00th=[ 785], | 70.00th=[ 1804], 80.00th=[ 1804], 90.00th=[ 1804], 95.00th=[ 1804], | 99.00th=[ 1804], 99.50th=[ 1804], 99.90th=[ 1804], 99.95th=[ 1804], | 99.99th=[ 1804] bw ( KiB/s): min= 7968, max= 8126, per=69.60%, avg=8047.00, stdev=111.72, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 250=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=3.61%, ctx=28, 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=180477: Tue Sep 8 00:07:24 2026 write: IOPS=1, BW=5442KiB/s (5573kB/s)(12.0MiB/2258msec); 0 zone resets clat (msec): min=484, max=1044, avg=749.67, stdev=281.30 lat (msec): min=484, max=1046, avg=751.32, stdev=281.81 clat percentiles (msec): | 1.00th=[ 485], 5.00th=[ 485], 10.00th=[ 485], 20.00th=[ 485], | 30.00th=[ 485], 40.00th=[ 718], 50.00th=[ 718], 60.00th=[ 718], | 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= 7968, max= 8126, per=69.60%, avg=8047.00, stdev=111.72, 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=5.10%, ctx=35, 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=5781KiB/s (5920kB/s), 1445KiB/s-5024KiB/s (1480kB/s-5144kB/s), io=16.0MiB (16.8MB), run=2446-2834msec WRITE: bw=11.3MiB/s (11.8MB/s), 2891KiB/s-5442KiB/s (2960kB/s-5573kB/s), io=32.0MiB (33.6MB), run=2258-2834msec