== sanity test 398b: DIO and buffer IO race ============== 01:09:28 (1788584968) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 4.89685 s, 10.3 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=145983: Sat Sep 5 01:12:06 2026 read: IOPS=10, BW=42.9KiB/s (43.9kB/s)(5992KiB/139658msec) clat (usec): min=33, max=448654, avg=44663.33, stdev=35575.33 lat (usec): min=33, max=448656, avg=44671.86, stdev=35577.15 clat percentiles (usec): | 1.00th=[ 48], 5.00th=[ 62], 10.00th=[ 105], 20.00th=[ 20841], | 30.00th=[ 26346], 40.00th=[ 32113], 50.00th=[ 38011], 60.00th=[ 45351], | 70.00th=[ 55837], 80.00th=[ 66323], 90.00th=[ 84411], 95.00th=[102237], | 99.00th=[160433], 99.50th=[214959], 99.90th=[304088], 99.95th=[446694], | 99.99th=[446694] bw ( KiB/s): min= 7, max= 111, per=25.43%, avg=42.72, stdev=20.08, samples=272 iops : min= 1, max= 27, avg=10.04, stdev= 5.06, samples=272 write: IOPS=11, BW=45.1KiB/s (46.2kB/s)(6296KiB/139658msec); 0 zone resets clat (usec): min=919, max=1534.3k, avg=45854.82, stdev=59394.74 lat (usec): min=920, max=1534.3k, avg=45857.05, stdev=59395.21 clat percentiles (usec): | 1.00th=[ 1045], 5.00th=[ 1237], 10.00th=[ 1663], | 20.00th=[ 4228], 30.00th=[ 8979], 40.00th=[ 20055], | 50.00th=[ 34341], 60.00th=[ 46924], 70.00th=[ 59507], | 80.00th=[ 79168], 90.00th=[ 105382], 95.00th=[ 132645], | 99.00th=[ 202376], 99.50th=[ 235930], 99.90th=[ 421528], | 99.95th=[1535116], 99.99th=[1535116] bw ( KiB/s): min= 7, max= 126, per=25.42%, avg=44.74, stdev=21.19, samples=273 iops : min= 1, max= 31, avg=10.54, stdev= 5.34, samples=273 lat (usec) : 50=0.55%, 100=4.23%, 250=0.42%, 500=0.16%, 750=0.07% lat (usec) : 1000=0.29% lat (msec) : 2=5.86%, 4=3.94%, 10=6.35%, 20=7.98%, 50=33.82% lat (msec) : 100=27.44%, 250=8.53%, 500=0.33%, 2000=0.03% cpu : usr=0.07%, sys=4.71%, ctx=6526, 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=145984: Sat Sep 5 01:12:06 2026 read: IOPS=10, BW=42.8KiB/s (43.8kB/s)(5940KiB/138885msec) clat (usec): min=34, max=501512, avg=45858.33, stdev=35941.04 lat (usec): min=34, max=501514, avg=45859.83, stdev=35941.12 clat percentiles (usec): | 1.00th=[ 50], 5.00th=[ 65], 10.00th=[ 1106], 20.00th=[ 20317], | 30.00th=[ 26870], 40.00th=[ 32113], 50.00th=[ 38536], 60.00th=[ 46400], | 70.00th=[ 57934], 80.00th=[ 71828], 90.00th=[ 86508], 95.00th=[104334], | 99.00th=[149947], 99.50th=[177210], 99.90th=[446694], 99.95th=[501220], | 99.99th=[501220] bw ( KiB/s): min= 7, max= 103, per=25.92%, avg=43.54, stdev=19.08, samples=266 iops : min= 1, max= 25, avg=10.23, stdev= 4.78, samples=266 write: IOPS=11, BW=45.7KiB/s (46.8kB/s)(6348KiB/138885msec); 0 zone resets clat (usec): min=972, max=1524.7k, avg=44239.13, stdev=59340.00 lat (usec): min=973, max=1524.7k, avg=44246.76, stdev=59337.98 clat percentiles (usec): | 1.00th=[ 1074], 5.00th=[ 1237], 10.00th=[ 1582], | 20.00th=[ 4113], 30.00th=[ 7767], 40.00th=[ 17171], | 50.00th=[ 32637], 60.00th=[ 44827], 70.00th=[ 57934], | 80.00th=[ 76022], 90.00th=[ 103285], 95.00th=[ 127402], | 99.00th=[ 196084], 99.50th=[ 242222], 99.90th=[ 442500], | 99.95th=[1518339], 99.99th=[1518339] bw ( KiB/s): min= 7, max= 175, per=25.82%, avg=45.44, stdev=21.29, samples=272 iops : min= 1, max= 43, avg=10.71, stdev= 5.34, samples=272 lat (usec) : 50=0.52%, 100=3.68%, 250=0.39%, 500=0.10%, 750=0.07% lat (usec) : 1000=0.16% lat (msec) : 2=6.12%, 4=4.17%, 10=6.90%, 20=8.92%, 50=32.94% lat (msec) : 100=27.12%, 250=8.63%, 500=0.23%, 750=0.03%, 2000=0.03% cpu : usr=0.07%, sys=4.75%, ctx=6569, majf=0, minf=17 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1485,1587,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145985: Sat Sep 5 01:12:06 2026 read: IOPS=10, BW=42.4KiB/s (43.4kB/s)(6028KiB/142224msec) clat (usec): min=33, max=1558.7k, avg=45573.63, stdev=52041.75 lat (usec): min=34, max=1558.7k, avg=45577.27, stdev=52040.42 clat percentiles (usec): | 1.00th=[ 49], 5.00th=[ 62], 10.00th=[ 109], | 20.00th=[ 19792], 30.00th=[ 26346], 40.00th=[ 31851], | 50.00th=[ 38011], 60.00th=[ 45876], 70.00th=[ 56361], | 80.00th=[ 67634], 90.00th=[ 87557], 95.00th=[ 105382], | 99.00th=[ 149947], 99.50th=[ 175113], 99.90th=[ 509608], | 99.95th=[1551893], 99.99th=[1551893] bw ( KiB/s): min= 7, max= 126, per=25.14%, avg=42.23, stdev=20.30, samples=277 iops : min= 1, max= 31, avg= 9.90, stdev= 5.08, samples=277 write: IOPS=11, BW=44.0KiB/s (45.1kB/s)(6260KiB/142224msec); 0 zone resets clat (usec): min=866, max=405571, avg=46660.32, stdev=49179.63 lat (usec): min=867, max=405572, avg=46665.90, stdev=49176.41 clat percentiles (usec): | 1.00th=[ 1057], 5.00th=[ 1287], 10.00th=[ 1958], 20.00th=[ 4752], | 30.00th=[ 10290], 40.00th=[ 23987], 50.00th=[ 34341], 60.00th=[ 46400], | 70.00th=[ 61080], 80.00th=[ 80217], 90.00th=[107480], 95.00th=[137364], | 99.00th=[212861], 99.50th=[267387], 99.90th=[383779], 99.95th=[404751], | 99.99th=[404751] bw ( KiB/s): min= 7, max= 159, per=24.97%, avg=43.94, stdev=22.08, samples=276 iops : min= 1, max= 39, avg=10.33, stdev= 5.54, samples=276 lat (usec) : 50=0.59%, 100=4.20%, 250=0.46%, 500=0.10%, 1000=0.26% lat (msec) : 2=5.08%, 4=3.74%, 10=6.71%, 20=8.04%, 50=34.73% lat (msec) : 100=26.89%, 250=8.85%, 500=0.29%, 750=0.03%, 2000=0.03% cpu : usr=0.08%, sys=4.65%, ctx=6531, 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=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=145986: Sat Sep 5 01:12:06 2026 read: IOPS=11, BW=44.1KiB/s (45.1kB/s)(6052KiB/137277msec) clat (usec): min=33, max=1359.7k, avg=45803.41, stdev=49454.78 lat (usec): min=33, max=1359.7k, avg=45809.07, stdev=49454.77 clat percentiles (usec): | 1.00th=[ 49], 5.00th=[ 62], 10.00th=[ 129], | 20.00th=[ 21103], 30.00th=[ 27132], 40.00th=[ 31589], | 50.00th=[ 37487], 60.00th=[ 44827], 70.00th=[ 54264], | 80.00th=[ 66323], 90.00th=[ 85459], 95.00th=[ 105382], | 99.00th=[ 164627], 99.50th=[ 214959], 99.90th=[ 438305], | 99.95th=[1367344], 99.99th=[1367344] bw ( KiB/s): min= 7, max= 95, per=26.36%, avg=44.29, stdev=19.23, samples=265 iops : min= 1, max= 23, avg=10.42, stdev= 4.84, samples=265 write: IOPS=11, BW=45.4KiB/s (46.5kB/s)(6236KiB/137277msec); 0 zone resets clat (usec): min=912, max=317088, avg=43269.55, stdev=44601.99 lat (usec): min=913, max=317091, avg=43277.30, stdev=44602.52 clat percentiles (usec): | 1.00th=[ 1037], 5.00th=[ 1221], 10.00th=[ 1434], 20.00th=[ 3720], | 30.00th=[ 7701], 40.00th=[ 17433], 50.00th=[ 32113], 60.00th=[ 43779], | 70.00th=[ 57934], 80.00th=[ 79168], 90.00th=[104334], 95.00th=[130548], | 99.00th=[179307], 99.50th=[221250], 99.90th=[256902], 99.95th=[316670], | 99.99th=[316670] bw ( KiB/s): min= 7, max= 127, per=25.72%, avg=45.27, stdev=19.20, samples=267 iops : min= 1, max= 31, avg=10.67, stdev= 4.85, samples=267 lat (usec) : 50=0.62%, 100=4.13%, 250=0.36%, 500=0.07%, 750=0.03% lat (usec) : 1000=0.23% lat (msec) : 2=6.67%, 4=3.68%, 10=7.13%, 20=7.03%, 50=35.68% lat (msec) : 100=25.33%, 250=8.79%, 500=0.23%, 2000=0.03% cpu : usr=0.08%, sys=4.68%, ctx=6448, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1513,1559,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=169KiB/s (173kB/s), 42.4KiB/s-44.1KiB/s (43.4kB/s-45.1kB/s), io=23.4MiB (24.6MB), run=137277-142224msec WRITE: bw=177KiB/s (181kB/s), 44.0KiB/s-45.7KiB/s (45.1kB/s-46.8kB/s), io=24.6MiB (25.7MB), run=137277-142224msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145989: Sat Sep 5 01:14:52 2026 read: IOPS=4, BW=19.7KiB/s (20.1kB/s)(5992KiB/304640msec) clat (msec): min=5, max=1594, avg=39.68, stdev=57.72 lat (msec): min=5, max=1594, avg=39.68, stdev=57.72 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 12], 20.00th=[ 16], | 30.00th=[ 19], 40.00th=[ 22], 50.00th=[ 26], 60.00th=[ 32], | 70.00th=[ 38], 80.00th=[ 51], 90.00th=[ 80], 95.00th=[ 113], | 99.00th=[ 228], 99.50th=[ 288], 99.90th=[ 468], 99.95th=[ 1603], | 99.99th=[ 1603] bw ( KiB/s): min= 7, max= 87, per=28.35%, avg=22.11, stdev=15.09, samples=521 iops : min= 1, max= 21, avg= 4.88, stdev= 3.80, samples=521 write: IOPS=5, BW=20.7KiB/s (21.2kB/s)(6296KiB/304640msec); 0 zone resets clat (msec): min=33, max=555, avg=155.67, stdev=72.12 lat (msec): min=33, max=555, avg=155.68, stdev=72.12 clat percentiles (msec): | 1.00th=[ 53], 5.00th=[ 69], 10.00th=[ 80], 20.00th=[ 97], | 30.00th=[ 110], 40.00th=[ 125], 50.00th=[ 140], 60.00th=[ 157], | 70.00th=[ 180], 80.00th=[ 207], 90.00th=[ 255], 95.00th=[ 305], | 99.00th=[ 376], 99.50th=[ 409], 99.90th=[ 464], 99.95th=[ 558], | 99.99th=[ 558] bw ( KiB/s): min= 7, max= 48, per=25.12%, avg=20.60, stdev= 9.07, samples=586 iops : min= 1, max= 12, avg= 4.50, stdev= 2.31, samples=586 lat (msec) : 10=2.28%, 20=14.65%, 50=22.20%, 100=17.55%, 250=37.47% lat (msec) : 500=5.79%, 750=0.03%, 2000=0.03% cpu : usr=0.04%, sys=1.05%, ctx=5153, 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=145990: Sat Sep 5 01:14:52 2026 read: IOPS=4, BW=19.5KiB/s (19.0kB/s)(5940KiB/304557msec) clat (msec): min=5, max=1477, avg=38.69, stdev=55.89 lat (msec): min=5, max=1477, avg=38.69, stdev=55.89 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 12], 20.00th=[ 16], | 30.00th=[ 19], 40.00th=[ 22], 50.00th=[ 26], 60.00th=[ 31], | 70.00th=[ 38], 80.00th=[ 49], 90.00th=[ 77], 95.00th=[ 107], | 99.00th=[ 205], 99.50th=[ 300], 99.90th=[ 667], 99.95th=[ 1485], | 99.99th=[ 1485] bw ( KiB/s): min= 7, max= 95, per=29.68%, avg=23.15, stdev=15.32, samples=493 iops : min= 1, max= 23, avg= 5.14, stdev= 3.85, samples=493 write: IOPS=5, BW=20.8KiB/s (21.3kB/s)(6348KiB/304557msec); 0 zone resets clat (msec): min=42, max=607, avg=155.60, stdev=73.70 lat (msec): min=42, max=607, avg=155.60, stdev=73.70 clat percentiles (msec): | 1.00th=[ 56], 5.00th=[ 72], 10.00th=[ 81], 20.00th=[ 95], | 30.00th=[ 109], 40.00th=[ 122], 50.00th=[ 140], 60.00th=[ 157], | 70.00th=[ 182], 80.00th=[ 209], 90.00th=[ 257], 95.00th=[ 300], | 99.00th=[ 405], 99.50th=[ 443], 99.90th=[ 506], 99.95th=[ 609], | 99.99th=[ 609] bw ( KiB/s): min= 7, max= 47, per=25.06%, avg=20.55, stdev= 9.13, samples=591 iops : min= 1, max= 11, avg= 4.49, stdev= 2.31, samples=591 lat (msec) : 10=2.15%, 20=15.10%, 50=22.01%, 100=19.04%, 250=35.90% lat (msec) : 500=5.66%, 750=0.10%, 2000=0.03% cpu : usr=0.04%, sys=1.04%, ctx=5066, 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=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=145991: Sat Sep 5 01:14:52 2026 read: IOPS=4, BW=19.7KiB/s (20.2kB/s)(6028KiB/305592msec) clat (msec): min=4, max=670, avg=39.17, stdev=42.03 lat (msec): min=4, max=670, avg=39.17, stdev=42.03 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 12], 20.00th=[ 16], | 30.00th=[ 19], 40.00th=[ 22], 50.00th=[ 26], 60.00th=[ 31], | 70.00th=[ 39], 80.00th=[ 52], 90.00th=[ 85], 95.00th=[ 113], | 99.00th=[ 213], 99.50th=[ 266], 99.90th=[ 359], 99.95th=[ 667], | 99.99th=[ 667] bw ( KiB/s): min= 7, max= 95, per=28.18%, avg=21.98, stdev=15.21, samples=525 iops : min= 1, max= 23, avg= 4.86, stdev= 3.83, samples=525 write: IOPS=5, BW=20.5KiB/s (20.0kB/s)(6260KiB/305592msec); 0 zone resets clat (msec): min=35, max=1741, avg=157.44, stdev=85.17 lat (msec): min=35, max=1741, avg=157.45, stdev=85.17 clat percentiles (msec): | 1.00th=[ 46], 5.00th=[ 68], 10.00th=[ 81], 20.00th=[ 97], | 30.00th=[ 111], 40.00th=[ 125], 50.00th=[ 140], 60.00th=[ 157], | 70.00th=[ 178], 80.00th=[ 207], 90.00th=[ 266], 95.00th=[ 309], | 99.00th=[ 409], 99.50th=[ 443], 99.90th=[ 609], 99.95th=[ 1737], | 99.99th=[ 1737] bw ( KiB/s): min= 7, max= 63, per=24.69%, avg=20.25, stdev= 9.77, samples=590 iops : min= 1, max= 15, avg= 4.41, stdev= 2.49, samples=590 lat (msec) : 10=2.31%, 20=14.84%, 50=22.43%, 100=17.38%, 250=36.36% lat (msec) : 500=6.58%, 750=0.07%, 2000=0.03% cpu : usr=0.04%, sys=1.04%, ctx=5191, 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=145992: Sat Sep 5 01:14:52 2026 read: IOPS=4, BW=19.9KiB/s (20.4kB/s)(6052KiB/304430msec) clat (msec): min=6, max=495, avg=39.24, stdev=41.81 lat (msec): min=6, max=495, avg=39.24, stdev=41.81 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 16], | 30.00th=[ 19], 40.00th=[ 22], 50.00th=[ 26], 60.00th=[ 31], | 70.00th=[ 37], 80.00th=[ 53], 90.00th=[ 88], 95.00th=[ 113], | 99.00th=[ 228], 99.50th=[ 247], 99.90th=[ 443], 99.95th=[ 498], | 99.99th=[ 498] bw ( KiB/s): min= 7, max= 111, per=29.57%, avg=23.06, stdev=16.04, samples=505 iops : min= 1, max= 27, avg= 5.12, stdev= 4.04, samples=505 write: IOPS=5, BW=20.5KiB/s (20.0kB/s)(6236KiB/304430msec); 0 zone resets clat (msec): min=41, max=1732, avg=157.09, stdev=83.48 lat (msec): min=41, max=1732, avg=157.10, stdev=83.48 clat percentiles (msec): | 1.00th=[ 52], 5.00th=[ 70], 10.00th=[ 80], 20.00th=[ 96], | 30.00th=[ 111], 40.00th=[ 125], 50.00th=[ 142], 60.00th=[ 157], | 70.00th=[ 178], 80.00th=[ 209], 90.00th=[ 253], 95.00th=[ 296], | 99.00th=[ 414], 99.50th=[ 472], 99.90th=[ 575], 99.95th=[ 1737], | 99.99th=[ 1737] bw ( KiB/s): min= 7, max= 48, per=24.79%, avg=20.33, stdev= 9.04, samples=587 iops : min= 1, max= 12, avg= 4.43, stdev= 2.30, samples=587 lat (msec) : 10=2.54%, 20=15.20%, 50=21.42%, 100=18.23%, 250=37.08% lat (msec) : 500=5.37%, 750=0.13%, 2000=0.03% cpu : usr=0.05%, sys=1.06%, ctx=5110, 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=78.6KiB/s (80.5kB/s), 19.5KiB/s-19.9KiB/s (19.0kB/s-20.4kB/s), io=23.4MiB (24.6MB), run=304430-305592msec WRITE: bw=82.3KiB/s (84.2kB/s), 20.5KiB/s-20.8KiB/s (20.0kB/s-21.3kB/s), io=24.6MiB (25.7MB), run=304430-305592msec 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=146048: Sat Sep 5 01:15:31 2026 read: IOPS=13, BW=210KiB/s (215kB/s)(5920KiB/28161msec) clat (usec): min=36, max=350992, avg=41323.68, stdev=34502.44 lat (usec): min=36, max=350993, avg=41325.03, stdev=34502.44 clat percentiles (usec): | 1.00th=[ 46], 5.00th=[ 61], 10.00th=[ 70], 20.00th=[ 506], | 30.00th=[ 25822], 40.00th=[ 32375], 50.00th=[ 40109], 60.00th=[ 46400], | 70.00th=[ 53740], 80.00th=[ 64226], 90.00th=[ 81265], 95.00th=[ 93848], | 99.00th=[131597], 99.50th=[141558], 99.90th=[350225], 99.95th=[350225], | 99.99th=[350225] bw ( KiB/s): min= 95, max= 349, per=26.39%, avg=208.47, stdev=65.88, samples=55 iops : min= 5, max= 21, avg=12.27, stdev= 4.16, samples=55 write: IOPS=14, BW=226KiB/s (232kB/s)(6368KiB/28161msec); 0 zone resets clat (usec): min=1390, max=159625, avg=31874.36, stdev=32402.12 lat (usec): min=1391, max=159627, avg=31882.06, stdev=32400.76 clat percentiles (usec): | 1.00th=[ 1500], 5.00th=[ 1909], 10.00th=[ 3392], 20.00th=[ 6063], | 30.00th=[ 8848], 40.00th=[ 12780], 50.00th=[ 19792], 60.00th=[ 29230], | 70.00th=[ 38536], 80.00th=[ 55313], 90.00th=[ 77071], 95.00th=[ 98042], | 99.00th=[147850], 99.50th=[156238], 99.90th=[160433], 99.95th=[160433], | 99.99th=[160433] bw ( KiB/s): min= 31, max= 532, per=27.11%, avg=225.58, stdev=95.07, samples=55 iops : min= 1, max= 33, avg=13.35, stdev= 6.02, samples=55 lat (usec) : 50=0.91%, 100=7.03%, 250=1.43%, 500=0.13%, 750=0.26% lat (msec) : 2=3.26%, 4=3.52%, 10=11.07%, 20=10.68%, 50=33.07% lat (msec) : 100=24.48%, 250=4.04%, 500=0.13% cpu : usr=0.09%, sys=5.82%, ctx=1462, 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=146049: Sat Sep 5 01:15:31 2026 read: IOPS=12, BW=200KiB/s (205kB/s)(5744KiB/28678msec) clat (usec): min=33, max=253205, avg=41011.11, stdev=36776.54 lat (usec): min=33, max=253206, avg=41024.76, stdev=36779.34 clat percentiles (usec): | 1.00th=[ 41], 5.00th=[ 55], 10.00th=[ 66], 20.00th=[ 101], | 30.00th=[ 22152], 40.00th=[ 30278], 50.00th=[ 38011], 60.00th=[ 43254], | 70.00th=[ 51643], 80.00th=[ 64750], 90.00th=[ 88605], 95.00th=[111674], | 99.00th=[156238], 99.50th=[185598], 99.90th=[252707], 99.95th=[252707], | 99.99th=[252707] bw ( KiB/s): min= 61, max= 380, per=25.24%, avg=199.38, stdev=78.33, samples=56 iops : min= 3, max= 23, avg=11.68, stdev= 4.94, samples=56 write: IOPS=14, BW=228KiB/s (234kB/s)(6544KiB/28678msec); 0 zone resets clat (usec): min=1373, max=231491, avg=33917.96, stdev=36872.98 lat (usec): min=1373, max=231493, avg=33931.88, stdev=36863.40 clat percentiles (usec): | 1.00th=[ 1467], 5.00th=[ 1811], 10.00th=[ 2999], 20.00th=[ 5604], | 30.00th=[ 8094], 40.00th=[ 11207], 50.00th=[ 17695], 60.00th=[ 27657], | 70.00th=[ 44303], 80.00th=[ 63701], 90.00th=[ 87557], 95.00th=[101188], | 99.00th=[145753], 99.50th=[191890], 99.90th=[231736], 99.95th=[231736], | 99.99th=[231736] bw ( KiB/s): min= 93, max= 699, per=27.36%, avg=227.64, stdev=105.93, samples=56 iops : min= 5, max= 43, avg=13.48, stdev= 6.70, samples=56 lat (usec) : 50=1.30%, 100=7.94%, 250=1.43%, 500=0.26%, 750=0.13% lat (msec) : 2=3.65%, 4=3.78%, 10=13.67%, 20=8.85%, 50=29.69% lat (msec) : 100=23.18%, 250=5.99%, 500=0.13% cpu : usr=0.09%, sys=5.69%, ctx=1403, 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=146050: Sat Sep 5 01:15:31 2026 read: IOPS=12, BW=207KiB/s (212kB/s)(6256KiB/30281msec) clat (usec): min=33, max=390422, avg=43354.76, stdev=40275.06 lat (usec): min=34, max=390423, avg=43359.16, stdev=40274.02 clat percentiles (usec): | 1.00th=[ 41], 5.00th=[ 60], 10.00th=[ 69], 20.00th=[ 237], | 30.00th=[ 25035], 40.00th=[ 32375], 50.00th=[ 39060], 60.00th=[ 46924], | 70.00th=[ 54789], 80.00th=[ 67634], 90.00th=[ 84411], 95.00th=[105382], | 99.00th=[160433], 99.50th=[337642], 99.90th=[392168], 99.95th=[392168], | 99.99th=[392168] bw ( KiB/s): min= 62, max= 442, per=26.02%, avg=205.58, stdev=66.92, samples=59 iops : min= 3, max= 27, avg=12.08, stdev= 4.22, samples=59 write: IOPS=12, BW=199KiB/s (204kB/s)(6032KiB/30281msec); 0 zone resets clat (usec): min=1396, max=241299, avg=34718.92, stdev=38678.29 lat (usec): min=1399, max=241300, avg=34722.08, stdev=38678.25 clat percentiles (usec): | 1.00th=[ 1450], 5.00th=[ 1778], 10.00th=[ 2900], 20.00th=[ 4883], | 30.00th=[ 7242], 40.00th=[ 10552], 50.00th=[ 17957], 60.00th=[ 30016], | 70.00th=[ 45351], 80.00th=[ 63701], 90.00th=[ 93848], 95.00th=[112722], | 99.00th=[160433], 99.50th=[173016], 99.90th=[242222], 99.95th=[242222], | 99.99th=[242222] bw ( KiB/s): min= 31, max= 538, per=23.59%, avg=196.25, stdev=102.00, samples=59 iops : min= 1, max= 33, avg=11.49, stdev= 6.44, samples=59 lat (usec) : 50=1.30%, 100=6.64%, 250=2.47%, 500=0.26%, 750=0.39% lat (usec) : 1000=0.26% lat (msec) : 2=3.78%, 4=4.04%, 10=11.46%, 20=7.68%, 50=30.34% lat (msec) : 100=25.26%, 250=5.86%, 500=0.26% cpu : usr=0.08%, sys=5.69%, ctx=1484, 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=146051: Sat Sep 5 01:15:31 2026 read: IOPS=12, BW=201KiB/s (205kB/s)(6032KiB/30062msec) clat (usec): min=33, max=386192, avg=43794.39, stdev=39771.39 lat (usec): min=33, max=386193, avg=43804.70, stdev=39785.99 clat percentiles (usec): | 1.00th=[ 39], 5.00th=[ 57], 10.00th=[ 63], 20.00th=[ 99], | 30.00th=[ 23462], 40.00th=[ 30802], 50.00th=[ 40109], 60.00th=[ 48497], | 70.00th=[ 58983], 80.00th=[ 70779], 90.00th=[ 89654], 95.00th=[106431], | 99.00th=[166724], 99.50th=[198181], 99.90th=[387974], 99.95th=[387974], | 99.99th=[387974] bw ( KiB/s): min= 63, max= 438, per=25.23%, avg=199.31, stdev=79.87, samples=59 iops : min= 3, max= 27, avg=11.69, stdev= 5.04, samples=59 write: IOPS=13, BW=208KiB/s (213kB/s)(6256KiB/30062msec); 0 zone resets clat (usec): min=1408, max=243437, avg=33966.53, stdev=36052.52 lat (usec): min=1410, max=243438, avg=33969.41, stdev=36052.70 clat percentiles (usec): | 1.00th=[ 1565], 5.00th=[ 1811], 10.00th=[ 3195], 20.00th=[ 5407], | 30.00th=[ 7898], 40.00th=[ 12387], 50.00th=[ 18482], 60.00th=[ 30278], | 70.00th=[ 45876], 80.00th=[ 60556], 90.00th=[ 84411], 95.00th=[107480], | 99.00th=[143655], 99.50th=[166724], 99.90th=[244319], 99.95th=[244319], | 99.99th=[244319] bw ( KiB/s): min= 63, max= 412, per=24.98%, avg=207.85, stdev=82.13, samples=59 iops : min= 3, max= 25, avg=12.22, stdev= 5.20, samples=59 lat (usec) : 50=1.04%, 100=8.85%, 250=1.30%, 500=0.65% lat (msec) : 2=3.52%, 4=3.91%, 10=10.55%, 20=9.90%, 50=27.86% lat (msec) : 100=26.43%, 250=5.86%, 500=0.13% cpu : usr=0.06%, sys=5.46%, ctx=1469, 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=791KiB/s (810kB/s), 200KiB/s-210KiB/s (205kB/s-215kB/s), io=23.4MiB (24.5MB), run=28161-30281msec WRITE: bw=832KiB/s (852kB/s), 199KiB/s-228KiB/s (204kB/s-234kB/s), io=24.6MiB (25.8MB), run=28161-30281msec rand-rw: (groupid=0, jobs=1): err= 0: pid=146053: Sat Sep 5 01:16:14 2026 read: IOPS=5, BW=84.1KiB/s (86.1kB/s)(5920KiB/70422msec) clat (msec): min=8, max=272, avg=41.93, stdev=38.43 lat (msec): min=8, max=272, avg=41.93, stdev=38.43 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 14], 20.00th=[ 18], | 30.00th=[ 21], 40.00th=[ 25], 50.00th=[ 30], 60.00th=[ 36], | 70.00th=[ 44], 80.00th=[ 56], 90.00th=[ 84], 95.00th=[ 112], | 99.00th=[ 226], 99.50th=[ 236], 99.90th=[ 275], 99.95th=[ 275], | 99.99th=[ 275] bw ( KiB/s): min= 31, max= 319, per=28.14%, avg=94.28, stdev=56.15, samples=123 iops : min= 1, max= 19, avg= 5.08, stdev= 3.57, samples=123 write: IOPS=5, BW=90.4KiB/s (92.6kB/s)(6368KiB/70422msec); 0 zone resets clat (msec): min=48, max=571, avg=137.70, stdev=66.84 lat (msec): min=48, max=571, avg=137.71, stdev=66.84 clat percentiles (msec): | 1.00th=[ 54], 5.00th=[ 67], 10.00th=[ 73], 20.00th=[ 87], | 30.00th=[ 103], 40.00th=[ 110], 50.00th=[ 120], 60.00th=[ 134], | 70.00th=[ 150], 80.00th=[ 182], 90.00th=[ 222], 95.00th=[ 266], | 99.00th=[ 443], 99.50th=[ 456], 99.90th=[ 575], 99.95th=[ 575], | 99.99th=[ 575] bw ( KiB/s): min= 23, max= 191, per=25.54%, avg=90.16, stdev=41.99, samples=139 iops : min= 1, max= 11, avg= 4.83, stdev= 2.70, samples=139 lat (msec) : 10=0.78%, 20=12.37%, 50=23.57%, 100=23.05%, 250=36.72% lat (msec) : 500=3.39%, 750=0.13% cpu : usr=0.05%, sys=1.33%, ctx=1346, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=146054: Sat Sep 5 01:16:14 2026 read: IOPS=5, BW=80.6KiB/s (82.5kB/s)(5744KiB/71289msec) clat (msec): min=7, max=290, avg=42.44, stdev=42.43 lat (msec): min=7, max=290, avg=42.44, stdev=42.43 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 12], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 20], 40.00th=[ 24], 50.00th=[ 28], 60.00th=[ 34], | 70.00th=[ 43], 80.00th=[ 57], 90.00th=[ 84], 95.00th=[ 150], | 99.00th=[ 218], 99.50th=[ 271], 99.90th=[ 292], 99.95th=[ 292], | 99.99th=[ 292] bw ( KiB/s): min= 22, max= 287, per=28.77%, avg=96.37, stdev=63.36, samples=116 iops : min= 1, max= 17, avg= 5.23, stdev= 3.94, samples=116 write: IOPS=5, BW=91.8KiB/s (93.0kB/s)(6544KiB/71289msec); 0 zone resets clat (msec): min=44, max=558, avg=136.76, stdev=67.36 lat (msec): min=44, max=558, avg=136.76, stdev=67.36 clat percentiles (msec): | 1.00th=[ 50], 5.00th=[ 65], 10.00th=[ 73], 20.00th=[ 86], | 30.00th=[ 97], 40.00th=[ 107], 50.00th=[ 117], 60.00th=[ 133], | 70.00th=[ 155], 80.00th=[ 184], 90.00th=[ 220], 95.00th=[ 279], | 99.00th=[ 347], 99.50th=[ 368], 99.90th=[ 558], 99.95th=[ 558], | 99.99th=[ 558] bw ( KiB/s): min= 22, max= 189, per=25.93%, avg=91.53, stdev=41.92, samples=139 iops : min= 1, max= 11, avg= 4.91, stdev= 2.69, samples=139 lat (msec) : 10=0.78%, 20=13.80%, 50=21.35%, 100=24.22%, 250=35.81% lat (msec) : 500=3.91%, 750=0.13% cpu : usr=0.04%, sys=1.27%, ctx=1423, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=359,409,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=146055: Sat Sep 5 01:16:14 2026 read: IOPS=5, BW=90.2KiB/s (92.3kB/s)(6256KiB/69380msec) clat (msec): min=6, max=276, avg=40.91, stdev=37.58 lat (msec): min=6, max=276, avg=40.92, stdev=37.58 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 14], 20.00th=[ 17], | 30.00th=[ 21], 40.00th=[ 25], 50.00th=[ 29], 60.00th=[ 35], | 70.00th=[ 42], 80.00th=[ 53], 90.00th=[ 79], 95.00th=[ 122], | 99.00th=[ 215], 99.50th=[ 224], 99.90th=[ 275], 99.95th=[ 275], | 99.99th=[ 275] bw ( KiB/s): min= 31, max= 320, per=30.24%, avg=101.31, stdev=68.29, samples=122 iops : min= 1, max= 20, avg= 5.53, stdev= 4.31, samples=122 write: IOPS=5, BW=86.9KiB/s (89.0kB/s)(6032KiB/69380msec); 0 zone resets clat (msec): min=55, max=408, avg=141.14, stdev=67.04 lat (msec): min=55, max=408, avg=141.17, stdev=67.04 clat percentiles (msec): | 1.00th=[ 61], 5.00th=[ 67], 10.00th=[ 77], 20.00th=[ 88], | 30.00th=[ 100], 40.00th=[ 110], 50.00th=[ 123], 60.00th=[ 140], | 70.00th=[ 161], 80.00th=[ 184], 90.00th=[ 232], 95.00th=[ 271], | 99.00th=[ 372], 99.50th=[ 401], 99.90th=[ 409], 99.95th=[ 409], | 99.99th=[ 409] bw ( KiB/s): min= 22, max= 160, per=24.89%, avg=87.87, stdev=39.42, samples=135 iops : min= 1, max= 10, avg= 4.68, stdev= 2.54, samples=135 lat (msec) : 10=1.43%, 20=12.76%, 50=25.65%, 100=22.14%, 250=33.98% lat (msec) : 500=4.04% cpu : usr=0.04%, sys=1.34%, ctx=1451, 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=146056: Sat Sep 5 01:16:14 2026 read: IOPS=5, BW=85.7KiB/s (87.7kB/s)(6032KiB/70401msec) clat (msec): min=8, max=351, avg=42.52, stdev=41.65 lat (msec): min=8, max=351, avg=42.52, stdev=41.65 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 12], 10.00th=[ 14], 20.00th=[ 18], | 30.00th=[ 21], 40.00th=[ 26], 50.00th=[ 31], 60.00th=[ 36], | 70.00th=[ 46], 80.00th=[ 56], 90.00th=[ 85], 95.00th=[ 117], | 99.00th=[ 253], 99.50th=[ 300], 99.90th=[ 351], 99.95th=[ 351], | 99.99th=[ 351] bw ( KiB/s): min= 30, max= 320, per=28.37%, avg=95.05, stdev=62.41, samples=124 iops : min= 1, max= 20, avg= 5.14, stdev= 3.96, samples=124 write: IOPS=5, BW=88.9KiB/s (90.0kB/s)(6256KiB/70401msec); 0 zone resets clat (msec): min=47, max=394, avg=138.73, stdev=66.08 lat (msec): min=47, max=394, avg=138.74, stdev=66.08 clat percentiles (msec): | 1.00th=[ 52], 5.00th=[ 68], 10.00th=[ 74], 20.00th=[ 88], | 30.00th=[ 100], 40.00th=[ 108], 50.00th=[ 123], 60.00th=[ 134], | 70.00th=[ 150], 80.00th=[ 180], 90.00th=[ 243], 95.00th=[ 271], | 99.00th=[ 376], 99.50th=[ 393], 99.90th=[ 397], 99.95th=[ 397], | 99.99th=[ 397] bw ( KiB/s): min= 23, max= 191, per=25.71%, avg=90.77, stdev=40.60, samples=136 iops : min= 1, max= 11, avg= 4.87, stdev= 2.60, samples=136 lat (msec) : 10=1.04%, 20=13.41%, 50=22.66%, 100=24.48%, 250=33.85% lat (msec) : 500=4.56% cpu : usr=0.04%, sys=1.33%, ctx=1347, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=336KiB/s (344kB/s), 80.6KiB/s-90.2KiB/s (82.5kB/s-92.3kB/s), io=23.4MiB (24.5MB), run=69380-71289msec WRITE: bw=353KiB/s (362kB/s), 86.9KiB/s-91.8KiB/s (89.0kB/s-93.0kB/s), io=24.6MiB (25.8MB), run=69380-71289msec 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=146074: Sat Sep 5 01:16:32 2026 read: IOPS=1, BW=1327KiB/s (1359kB/s)(7168KiB/5400msec) clat (msec): min=109, max=3131, avg=589.75, stdev=1121.42 lat (msec): min=109, max=3131, avg=589.75, stdev=1121.42 clat percentiles (msec): | 1.00th=[ 110], 5.00th=[ 110], 10.00th=[ 110], 20.00th=[ 138], | 30.00th=[ 142], 40.00th=[ 142], 50.00th=[ 184], 60.00th=[ 205], | 70.00th=[ 205], 80.00th=[ 220], 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= 1969, max= 6131, per=100.00%, avg=4059.67, stdev=2081.07, samples=3 iops : min= 1, max= 5, avg= 3.00, stdev= 2.00, samples=3 write: IOPS=0, BW=948KiB/s (971kB/s)(5120KiB/5400msec); 0 zone resets clat (msec): min=91, max=510, avg=250.10, stdev=184.03 lat (msec): min=91, max=511, avg=250.23, stdev=184.12 clat percentiles (msec): | 1.00th=[ 91], 5.00th=[ 91], 10.00th=[ 91], 20.00th=[ 91], | 30.00th=[ 114], 40.00th=[ 114], 50.00th=[ 161], 60.00th=[ 161], | 70.00th=[ 376], 80.00th=[ 376], 90.00th=[ 510], 95.00th=[ 510], | 99.00th=[ 510], 99.50th=[ 510], 99.90th=[ 510], 99.95th=[ 510], | 99.99th=[ 510] bw ( KiB/s): min= 1969, max= 4047, per=70.94%, avg=2685.00, stdev=1180.05, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 lat (msec) : 100=8.33%, 250=66.67%, 500=8.33%, 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=13.58%, ctx=704, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=7,5,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=146075: Sat Sep 5 01:16:32 2026 read: IOPS=0, BW=270KiB/s (277kB/s)(2048KiB/7575msec) clat (msec): min=365, max=392, avg=379.12, stdev=18.99 lat (msec): min=365, max=392, avg=379.12, stdev=18.99 clat percentiles (msec): | 1.00th=[ 368], 5.00th=[ 368], 10.00th=[ 368], 20.00th=[ 368], | 30.00th=[ 368], 40.00th=[ 368], 50.00th=[ 368], 60.00th=[ 393], | 70.00th=[ 393], 80.00th=[ 393], 90.00th=[ 393], 95.00th=[ 393], | 99.00th=[ 393], 99.50th=[ 393], 99.90th=[ 393], 99.95th=[ 393], | 99.99th=[ 393] bw ( KiB/s): min= 1899, max= 2039, per=72.84%, avg=1969.00, stdev=98.99, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1352KiB/s (1384kB/s)(10.0MiB/7575msec); 0 zone resets clat (msec): min=80, max=3032, avg=656.16, stdev=931.72 lat (msec): min=80, max=3032, avg=656.25, stdev=931.71 clat percentiles (msec): | 1.00th=[ 82], 5.00th=[ 82], 10.00th=[ 82], 20.00th=[ 140], | 30.00th=[ 199], 40.00th=[ 224], 50.00th=[ 234], 60.00th=[ 300], | 70.00th=[ 388], 80.00th=[ 443], 90.00th=[ 1519], 95.00th=[ 3037], | 99.00th=[ 3037], 99.50th=[ 3037], 99.90th=[ 3037], 99.95th=[ 3037], | 99.99th=[ 3037] bw ( KiB/s): min= 1899, max= 4079, per=74.50%, avg=2819.80, stdev=1136.34, samples=5 iops : min= 1, max= 3, avg= 1.80, stdev= 1.10, samples=5 lat (msec) : 100=8.33%, 250=33.33%, 500=41.67%, 2000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=8.93%, ctx=156, 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=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=146076: Sat Sep 5 01:16:32 2026 read: IOPS=0, BW=895KiB/s (916kB/s)(6144KiB/6865msec) clat (usec): min=1043, max=327624, avg=196876.95, stdev=112947.35 lat (usec): min=1045, max=327626, avg=196878.33, stdev=112947.35 clat percentiles (usec): | 1.00th=[ 1045], 5.00th=[ 1045], 10.00th=[ 1045], 20.00th=[143655], | 30.00th=[143655], 40.00th=[212861], 50.00th=[212861], 60.00th=[246416], | 70.00th=[250610], 80.00th=[250610], 90.00th=[329253], 95.00th=[329253], | 99.00th=[329253], 99.50th=[329253], 99.90th=[329253], 99.95th=[329253], | 99.99th=[329253] bw ( KiB/s): min= 1969, max= 6095, per=100.00%, avg=3369.00, stdev=2361.08, samples=3 iops : min= 1, max= 5, avg= 2.33, stdev= 2.31, samples=3 write: IOPS=0, BW=895KiB/s (916kB/s)(6144KiB/6865msec); 0 zone resets clat (msec): min=165, max=3736, avg=917.61, stdev=1392.41 lat (msec): min=165, max=3736, avg=917.69, stdev=1392.40 clat percentiles (msec): | 1.00th=[ 165], 5.00th=[ 165], 10.00th=[ 165], 20.00th=[ 174], | 30.00th=[ 174], 40.00th=[ 355], 50.00th=[ 355], 60.00th=[ 435], | 70.00th=[ 642], 80.00th=[ 642], 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= 1899, max= 4079, per=63.52%, avg=2404.20, stdev=937.99, samples=5 iops : min= 1, max= 3, avg= 1.40, stdev= 0.89, samples=5 lat (msec) : 2=8.33%, 250=50.00%, 500=25.00%, 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=9.69%, ctx=280, 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=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=146077: Sat Sep 5 01:16:32 2026 read: IOPS=0, BW=836KiB/s (856kB/s)(5120KiB/6125msec) clat (usec): min=555, max=343749, avg=156273.66, stdev=141061.18 lat (usec): min=556, max=343750, avg=156274.80, stdev=141060.80 clat percentiles (usec): | 1.00th=[ 553], 5.00th=[ 553], 10.00th=[ 553], 20.00th=[ 553], | 30.00th=[ 51119], 40.00th=[ 51119], 50.00th=[135267], 60.00th=[135267], | 70.00th=[250610], 80.00th=[250610], 90.00th=[341836], 95.00th=[341836], | 99.00th=[341836], 99.50th=[341836], 99.90th=[341836], 99.95th=[341836], | 99.99th=[341836] bw ( KiB/s): min= 3938, max= 4047, per=100.00%, avg=3992.50, stdev=77.07, samples=2 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1170KiB/s (1198kB/s)(7168KiB/6125msec); 0 zone resets clat (msec): min=129, max=3320, avg=751.06, stdev=1162.27 lat (msec): min=130, max=3321, avg=751.18, stdev=1162.30 clat percentiles (msec): | 1.00th=[ 130], 5.00th=[ 130], 10.00th=[ 130], 20.00th=[ 148], | 30.00th=[ 232], 40.00th=[ 232], 50.00th=[ 239], 60.00th=[ 305], | 70.00th=[ 305], 80.00th=[ 885], 90.00th=[ 3306], 95.00th=[ 3306], | 99.00th=[ 3306], 99.50th=[ 3306], 99.90th=[ 3306], 99.95th=[ 3306], | 99.99th=[ 3306] bw ( KiB/s): min= 1899, max= 4079, per=74.54%, avg=2821.40, stdev=1142.07, samples=5 iops : min= 1, max= 3, avg= 1.80, stdev= 1.10, samples=5 lat (usec) : 750=8.33% lat (msec) : 100=8.33%, 250=50.00%, 500=16.67%, 1000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=9.60%, ctx=206, 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=2704KiB/s (2769kB/s), 270KiB/s-1327KiB/s (277kB/s-1359kB/s), io=20.0MiB (20.0MB), run=5400-7575msec WRITE: bw=3785KiB/s (3876kB/s), 895KiB/s-1352KiB/s (916kB/s-1384kB/s), io=28.0MiB (29.4MB), run=5400-7575msec rand-rw: (groupid=0, jobs=1): err= 0: pid=146079: Sat Sep 5 01:16:33 2026 read: IOPS=0, BW=868KiB/s (888kB/s)(7168KiB/8262msec) clat (msec): min=122, max=2785, avg=886.26, stdev=1049.84 lat (msec): min=122, max=2785, avg=886.26, stdev=1049.84 clat percentiles (msec): | 1.00th=[ 124], 5.00th=[ 124], 10.00th=[ 124], 20.00th=[ 125], | 30.00th=[ 136], 40.00th=[ 136], 50.00th=[ 489], 60.00th=[ 634], | 70.00th=[ 634], 80.00th=[ 1921], 90.00th=[ 2802], 95.00th=[ 2802], | 99.00th=[ 2802], 99.50th=[ 2802], 99.90th=[ 2802], 99.95th=[ 2802], | 99.99th=[ 2802] bw ( KiB/s): min= 1976, max= 2043, per=83.36%, avg=2010.60, stdev=31.69, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 write: IOPS=0, BW=620KiB/s (635kB/s)(5120KiB/8262msec); 0 zone resets clat (msec): min=204, max=564, avg=348.60, stdev=180.06 lat (msec): min=204, max=565, avg=348.81, stdev=180.19 clat percentiles (msec): | 1.00th=[ 205], 5.00th=[ 205], 10.00th=[ 205], 20.00th=[ 205], | 30.00th=[ 220], 40.00th=[ 220], 50.00th=[ 230], 60.00th=[ 230], | 70.00th=[ 527], 80.00th=[ 527], 90.00th=[ 567], 95.00th=[ 567], | 99.00th=[ 567], 99.50th=[ 567], 99.90th=[ 567], 99.95th=[ 567], | 99.99th=[ 567] bw ( KiB/s): min= 2039, max= 6047, per=100.00%, avg=4043.00, stdev=2834.08, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 lat (msec) : 250=50.00%, 500=8.33%, 750=25.00%, 2000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=1.83%, ctx=72, 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=146080: Sat Sep 5 01:16:33 2026 read: IOPS=0, BW=241KiB/s (247kB/s)(2048KiB/8488msec) clat (msec): min=268, max=344, avg=306.31, stdev=53.50 lat (msec): min=268, max=344, avg=306.31, stdev=53.50 clat percentiles (msec): | 1.00th=[ 271], 5.00th=[ 271], 10.00th=[ 271], 20.00th=[ 271], | 30.00th=[ 271], 40.00th=[ 271], 50.00th=[ 271], 60.00th=[ 347], | 70.00th=[ 347], 80.00th=[ 347], 90.00th=[ 347], 95.00th=[ 347], | 99.00th=[ 347], 99.50th=[ 347], 99.90th=[ 347], 99.95th=[ 347], | 99.99th=[ 347] bw ( KiB/s): min= 2043, max= 2043, per=84.70%, avg=2043.00, stdev= 0.00, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1206KiB/s (1235kB/s)(10.0MiB/8488msec); 0 zone resets clat (msec): min=173, max=3861, avg=758.83, stdev=1113.07 lat (msec): min=173, max=3861, avg=758.98, stdev=1113.03 clat percentiles (msec): | 1.00th=[ 174], 5.00th=[ 174], 10.00th=[ 174], 20.00th=[ 194], | 30.00th=[ 249], 40.00th=[ 284], 50.00th=[ 376], 60.00th=[ 393], | 70.00th=[ 523], 80.00th=[ 634], 90.00th=[ 911], 95.00th=[ 3876], | 99.00th=[ 3876], 99.50th=[ 3876], 99.90th=[ 3876], 99.95th=[ 3876], | 99.99th=[ 3876] bw ( KiB/s): min= 1973, max= 4087, per=79.84%, avg=2696.33, stdev=1059.14, samples=6 iops : min= 1, max= 3, avg= 1.83, stdev= 0.98, samples=6 lat (msec) : 250=25.00%, 500=41.67%, 750=16.67%, 1000=8.33%, >=2000=8.33% cpu : usr=0.04%, sys=3.10%, ctx=135, 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=146081: Sat Sep 5 01:16:33 2026 read: IOPS=0, BW=841KiB/s (861kB/s)(6144KiB/7308msec) clat (msec): min=97, max=792, avg=270.49, stdev=262.72 lat (msec): min=97, max=792, avg=270.50, stdev=262.72 clat percentiles (msec): | 1.00th=[ 97], 5.00th=[ 97], 10.00th=[ 97], 20.00th=[ 138], | 30.00th=[ 138], 40.00th=[ 153], 50.00th=[ 153], 60.00th=[ 165], | 70.00th=[ 279], 80.00th=[ 279], 90.00th=[ 793], 95.00th=[ 793], | 99.00th=[ 793], 99.50th=[ 793], 99.90th=[ 793], 99.95th=[ 793], | 99.99th=[ 793] bw ( KiB/s): min= 1988, max= 4096, per=100.00%, avg=3343.33, stdev=1176.15, samples=3 iops : min= 1, max= 4, avg= 2.67, stdev= 1.53, samples=3 write: IOPS=0, BW=841KiB/s (861kB/s)(6144KiB/7308msec); 0 zone resets clat (msec): min=228, max=3364, avg=935.56, stdev=1198.98 lat (msec): min=228, max=3365, avg=935.63, stdev=1198.98 clat percentiles (msec): | 1.00th=[ 228], 5.00th=[ 228], 10.00th=[ 228], 20.00th=[ 347], | 30.00th=[ 347], 40.00th=[ 506], 50.00th=[ 506], 60.00th=[ 523], | 70.00th=[ 642], 80.00th=[ 642], 90.00th=[ 3373], 95.00th=[ 3373], | 99.00th=[ 3373], 99.50th=[ 3373], 99.90th=[ 3373], 99.95th=[ 3373], | 99.99th=[ 3373] bw ( KiB/s): min= 1988, max= 4087, per=75.26%, avg=2541.50, stdev=1030.69, samples=4 iops : min= 1, max= 3, avg= 1.75, stdev= 0.96, samples=4 lat (msec) : 100=8.33%, 250=33.33%, 500=16.67%, 750=25.00%, 1000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=3.12%, ctx=88, 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=146082: Sat Sep 5 01:16:33 2026 read: IOPS=0, BW=719KiB/s (736kB/s)(5120KiB/7122msec) clat (msec): min=58, max=618, avg=251.46, stdev=215.87 lat (msec): min=58, max=618, avg=251.46, stdev=215.87 clat percentiles (msec): | 1.00th=[ 59], 5.00th=[ 59], 10.00th=[ 59], 20.00th=[ 59], | 30.00th=[ 142], 40.00th=[ 142], 50.00th=[ 220], 60.00th=[ 220], | 70.00th=[ 220], 80.00th=[ 220], 90.00th=[ 617], 95.00th=[ 617], | 99.00th=[ 617], 99.50th=[ 617], 99.90th=[ 617], 99.95th=[ 617], | 99.99th=[ 617] bw ( KiB/s): min= 3946, max= 3976, per=100.00%, avg=3961.00, stdev=21.21, samples=2 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=2 write: IOPS=0, BW=1006KiB/s (1031kB/s)(7168KiB/7122msec); 0 zone resets clat (msec): min=221, max=3602, avg=775.93, stdev=1248.25 lat (msec): min=222, max=3603, avg=776.00, stdev=1248.25 clat percentiles (msec): | 1.00th=[ 222], 5.00th=[ 222], 10.00th=[ 222], 20.00th=[ 230], | 30.00th=[ 313], 40.00th=[ 313], 50.00th=[ 313], 60.00th=[ 342], | 70.00th=[ 342], 80.00th=[ 409], 90.00th=[ 3608], 95.00th=[ 3608], | 99.00th=[ 3608], 99.50th=[ 3608], 99.90th=[ 3608], 99.95th=[ 3608], | 99.99th=[ 3608] bw ( KiB/s): min= 2007, max= 6131, per=84.52%, avg=2854.40, stdev=1831.75, samples=5 iops : min= 1, max= 5, avg= 2.00, stdev= 1.73, samples=5 lat (msec) : 100=8.33%, 250=41.67%, 500=33.33%, 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=3.23%, ctx=85, 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=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=2413KiB/s (2471kB/s), 241KiB/s-868KiB/s (247kB/s-888kB/s), io=20.0MiB (20.0MB), run=7122-8488msec WRITE: bw=3378KiB/s (3459kB/s), 620KiB/s-1206KiB/s (635kB/s-1235kB/s), io=28.0MiB (29.4MB), run=7122-8488msec 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=146091: Sat Sep 5 01:16:52 2026 read: IOPS=0, BW=2771KiB/s (2837kB/s)(12.0MiB/4435msec) clat (msec): min=1000, max=1719, avg=1392.24, stdev=363.83 lat (msec): min=1000, max=1719, avg=1392.24, stdev=363.83 clat percentiles (msec): | 1.00th=[ 1003], 5.00th=[ 1003], 10.00th=[ 1003], 20.00th=[ 1003], | 30.00th=[ 1003], 40.00th=[ 1452], 50.00th=[ 1452], 60.00th=[ 1452], | 70.00th=[ 1720], 80.00th=[ 1720], 90.00th=[ 1720], 95.00th=[ 1720], | 99.00th=[ 1720], 99.50th=[ 1720], 99.90th=[ 1720], 99.95th=[ 1720], | 99.99th=[ 1720] bw ( KiB/s): min= 7892, max= 7937, per=100.00%, avg=7914.50, stdev=31.82, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 2000=100.00% cpu : usr=0.00%, sys=7.92%, ctx=267, 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=146092: Sat Sep 5 01:16:52 2026 read: IOPS=0, BW=810KiB/s (830kB/s)(4096KiB/5055msec) clat (nsec): min=1195.8M, max=1195.8M, avg=1195772231.00, stdev= 0.00 lat (nsec): min=1195.8M, max=1195.8M, avg=1195775455.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1200], 5.00th=[ 1200], 10.00th=[ 1200], 20.00th=[ 1200], | 30.00th=[ 1200], 40.00th=[ 1200], 50.00th=[ 1200], 60.00th=[ 1200], | 70.00th=[ 1200], 80.00th=[ 1200], 90.00th=[ 1200], 95.00th=[ 1200], | 99.00th=[ 1200], 99.50th=[ 1200], 99.90th=[ 1200], 99.95th=[ 1200], | 99.99th=[ 1200] bw ( KiB/s): min= 7937, max= 7937, per=100.00%, avg=7937.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=1621KiB/s (1659kB/s)(8192KiB/5055msec); 0 zone resets clat (msec): min=527, max=3283, avg=1905.20, stdev=1948.88 lat (msec): min=527, max=3283, avg=1905.83, stdev=1948.69 clat percentiles (msec): | 1.00th=[ 527], 5.00th=[ 527], 10.00th=[ 527], 20.00th=[ 527], | 30.00th=[ 527], 40.00th=[ 527], 50.00th=[ 527], 60.00th=[ 3272], | 70.00th=[ 3272], 80.00th=[ 3272], 90.00th=[ 3272], 95.00th=[ 3272], | 99.00th=[ 3272], 99.50th=[ 3272], 99.90th=[ 3272], 99.95th=[ 3272], | 99.99th=[ 3272] bw ( KiB/s): min= 8094, max= 8094, per=100.00%, avg=8094.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 750=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=2.71%, ctx=183, 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=146094: Sat Sep 5 01:16:52 2026 write: IOPS=1, BW=4103KiB/s (4201kB/s)(12.0MiB/2995msec); 0 zone resets clat (msec): min=525, max=1378, avg=985.87, stdev=430.47 lat (msec): min=527, max=1382, avg=987.82, stdev=431.43 clat percentiles (msec): | 1.00th=[ 527], 5.00th=[ 527], 10.00th=[ 527], 20.00th=[ 527], | 30.00th=[ 527], 40.00th=[ 1053], 50.00th=[ 1053], 60.00th=[ 1053], | 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= 5876, max= 7937, per=100.00%, avg=6906.50, stdev=1457.35, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=33.33%, 2000=66.67% cpu : usr=0.00%, sys=2.87%, ctx=55, 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=146096: Sat Sep 5 01:16:52 2026 write: IOPS=0, BW=2925KiB/s (2995kB/s)(12.0MiB/4201msec); 0 zone resets clat (msec): min=464, max=2888, avg=1309.36, stdev=1368.60 lat (msec): min=464, max=2888, avg=1309.90, stdev=1368.57 clat percentiles (msec): | 1.00th=[ 464], 5.00th=[ 464], 10.00th=[ 464], 20.00th=[ 464], | 30.00th=[ 464], 40.00th=[ 575], 50.00th=[ 575], 60.00th=[ 575], | 70.00th=[ 2903], 80.00th=[ 2903], 90.00th=[ 2903], 95.00th=[ 2903], | 99.00th=[ 2903], 99.50th=[ 2903], 99.90th=[ 2903], 99.95th=[ 2903], | 99.99th=[ 2903] bw ( KiB/s): min= 7937, max= 8143, per=100.00%, avg=8040.00, stdev=145.66, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 750=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=4.17%, ctx=83, 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=3241KiB/s (3319kB/s), 810KiB/s-2771KiB/s (830kB/s-2837kB/s), io=16.0MiB (16.8MB), run=4435-5055msec WRITE: bw=6482KiB/s (6638kB/s), 1621KiB/s-4103KiB/s (1659kB/s-4201kB/s), io=32.0MiB (33.6MB), run=2995-5055msec rand-rw: (groupid=0, jobs=1): err= 0: pid=146093: Sat Sep 5 01:16:53 2026 read: IOPS=0, BW=2459KiB/s (2518kB/s)(12.0MiB/4997msec) clat (msec): min=483, max=2978, avg=1642.74, stdev=1256.81 lat (msec): min=483, max=2978, avg=1642.75, stdev=1256.81 clat percentiles (msec): | 1.00th=[ 485], 5.00th=[ 485], 10.00th=[ 485], 20.00th=[ 485], | 30.00th=[ 485], 40.00th=[ 1469], 50.00th=[ 1469], 60.00th=[ 1469], | 70.00th=[ 2970], 80.00th=[ 2970], 90.00th=[ 2970], 95.00th=[ 2970], | 99.00th=[ 2970], 99.50th=[ 2970], 99.90th=[ 2970], 99.95th=[ 2970], | 99.99th=[ 2970] bw ( KiB/s): min= 8078, max= 8143, per=100.00%, avg=8110.50, stdev=45.96, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.08%, sys=1.92%, ctx=46, 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=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=146095: Sat Sep 5 01:16:53 2026 read: IOPS=0, BW=692KiB/s (709kB/s)(4096KiB/5917msec) clat (nsec): min=1602.3M, max=1602.3M, avg=1602251247.00, stdev= 0.00 lat (nsec): min=1602.3M, max=1602.3M, avg=1602253480.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1603], 5.00th=[ 1603], 10.00th=[ 1603], 20.00th=[ 1603], | 30.00th=[ 1603], 40.00th=[ 1603], 50.00th=[ 1603], 60.00th=[ 1603], | 70.00th=[ 1603], 80.00th=[ 1603], 90.00th=[ 1603], 95.00th=[ 1603], | 99.00th=[ 1603], 99.50th=[ 1603], 99.90th=[ 1603], 99.95th=[ 1603], | 99.99th=[ 1603] 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=1384KiB/s (1418kB/s)(8192KiB/5917msec); 0 zone resets clat (msec): min=1759, max=2426, avg=2092.66, stdev=471.48 lat (msec): min=1759, max=2426, avg=2092.94, stdev=471.60 clat percentiles (msec): | 1.00th=[ 1754], 5.00th=[ 1754], 10.00th=[ 1754], 20.00th=[ 1754], | 30.00th=[ 1754], 40.00th=[ 1754], 50.00th=[ 1754], 60.00th=[ 2433], | 70.00th=[ 2433], 80.00th=[ 2433], 90.00th=[ 2433], 95.00th=[ 2433], | 99.00th=[ 2433], 99.50th=[ 2433], 99.90th=[ 2433], 99.95th=[ 2433], | 99.99th=[ 2433] 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) : 2000=66.67%, >=2000=33.33% cpu : usr=0.00%, sys=1.23%, ctx=53, 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=146097: Sat Sep 5 01:16:53 2026 write: IOPS=0, BW=2077KiB/s (2127kB/s)(12.0MiB/5916msec); 0 zone resets clat (msec): min=438, max=2614, avg=1881.44, stdev=1249.71 lat (msec): min=441, max=2614, avg=1882.47, stdev=1248.38 clat percentiles (msec): | 1.00th=[ 439], 5.00th=[ 439], 10.00th=[ 439], 20.00th=[ 439], | 30.00th=[ 439], 40.00th=[ 2601], 50.00th=[ 2601], 60.00th=[ 2601], | 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= 8047, max= 8110, per=100.00%, avg=8078.50, stdev=44.55, 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=0.07%, sys=2.86%, ctx=49, 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=146098: Sat Sep 5 01:16:53 2026 write: IOPS=0, BW=3724KiB/s (3813kB/s)(12.0MiB/3300msec); 0 zone resets clat (msec): min=328, max=2533, avg=1077.24, stdev=1261.57 lat (msec): min=329, max=2534, avg=1077.54, stdev=1261.57 clat percentiles (msec): | 1.00th=[ 330], 5.00th=[ 330], 10.00th=[ 330], 20.00th=[ 330], | 30.00th=[ 330], 40.00th=[ 368], 50.00th=[ 368], 60.00th=[ 368], | 70.00th=[ 2534], 80.00th=[ 2534], 90.00th=[ 2534], 95.00th=[ 2534], | 99.00th=[ 2534], 99.50th=[ 2534], 99.90th=[ 2534], 99.95th=[ 2534], | 99.99th=[ 2534] bw ( KiB/s): min= 7001, max= 8094, per=100.00%, avg=7547.50, stdev=772.87, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=66.67%, >=2000=33.33% cpu : usr=0.00%, sys=2.88%, ctx=49, 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=2769KiB/s (2835kB/s), 692KiB/s-2459KiB/s (709kB/s-2518kB/s), io=16.0MiB (16.8MB), run=4997-5917msec WRITE: bw=5538KiB/s (5671kB/s), 1384KiB/s-3724KiB/s (1418kB/s-3813kB/s), io=32.0MiB (33.6MB), run=3300-5917msec