== sanity test 398b: DIO and buffer IO race ============== 18:31:21 (1787869881) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 5.67727 s, 8.9 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=145475: Thu Aug 27 18:33:39 2026 read: IOPS=12, BW=50.7KiB/s (51.9kB/s)(5992KiB/118283msec) clat (usec): min=35, max=374881, avg=37309.55, stdev=27638.68 lat (usec): min=35, max=374882, avg=37311.42, stdev=27638.25 clat percentiles (usec): | 1.00th=[ 51], 5.00th=[ 60], 10.00th=[ 1369], 20.00th=[ 17695], | 30.00th=[ 22938], 40.00th=[ 27395], 50.00th=[ 32375], 60.00th=[ 39060], | 70.00th=[ 46924], 80.00th=[ 54789], 90.00th=[ 69731], 95.00th=[ 84411], | 99.00th=[115868], 99.50th=[139461], 99.90th=[270533], 99.95th=[375391], | 99.99th=[375391] bw ( KiB/s): min= 7, max= 111, per=24.94%, avg=50.63, stdev=21.13, samples=231 iops : min= 1, max= 27, avg=12.03, stdev= 5.32, samples=231 write: IOPS=13, BW=53.2KiB/s (54.5kB/s)(6296KiB/118283msec); 0 zone resets clat (usec): min=864, max=1036.0k, avg=39323.68, stdev=49458.33 lat (usec): min=865, max=1036.0k, avg=39327.59, stdev=49457.79 clat percentiles (usec): | 1.00th=[ 1074], 5.00th=[ 1221], 10.00th=[ 1631], | 20.00th=[ 3982], 30.00th=[ 8291], 40.00th=[ 18482], | 50.00th=[ 28705], 60.00th=[ 39584], 70.00th=[ 51119], | 80.00th=[ 66323], 90.00th=[ 89654], 95.00th=[ 113771], | 99.00th=[ 166724], 99.50th=[ 221250], 99.90th=[ 700449], | 99.95th=[1035994], 99.99th=[1035994] bw ( KiB/s): min= 15, max= 127, per=25.19%, avg=53.40, stdev=19.42, samples=230 iops : min= 3, max= 31, avg=12.73, stdev= 4.92, samples=230 lat (usec) : 50=0.46%, 100=3.97%, 250=0.23%, 750=0.07%, 1000=0.16% lat (msec) : 2=6.22%, 4=4.17%, 10=7.13%, 20=10.61%, 50=38.64% lat (msec) : 100=23.76%, 250=4.36%, 500=0.16%, 750=0.03%, 2000=0.03% cpu : usr=0.08%, sys=4.96%, ctx=6551, 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=145476: Thu Aug 27 18:33:39 2026 read: IOPS=12, BW=51.8KiB/s (53.1kB/s)(5940KiB/114593msec) clat (usec): min=31, max=199309, avg=36326.86, stdev=25819.83 lat (usec): min=31, max=199310, avg=36328.21, stdev=25819.71 clat percentiles (usec): | 1.00th=[ 51], 5.00th=[ 61], 10.00th=[ 594], 20.00th=[ 16909], | 30.00th=[ 21890], 40.00th=[ 26346], 50.00th=[ 31851], 60.00th=[ 37487], | 70.00th=[ 44827], 80.00th=[ 54789], 90.00th=[ 68682], 95.00th=[ 83362], | 99.00th=[117965], 99.50th=[143655], 99.90th=[191890], 99.95th=[200279], | 99.99th=[200279] bw ( KiB/s): min= 6, max= 110, per=25.57%, avg=51.92, stdev=19.98, samples=224 iops : min= 1, max= 27, avg=12.35, stdev= 5.04, samples=224 write: IOPS=13, BW=55.4KiB/s (56.7kB/s)(6348KiB/114593msec); 0 zone resets clat (usec): min=752, max=1079.5k, avg=37920.10, stdev=47491.20 lat (usec): min=753, max=1079.5k, avg=37922.03, stdev=47491.33 clat percentiles (usec): | 1.00th=[ 1074], 5.00th=[ 1205], 10.00th=[ 1549], | 20.00th=[ 3589], 30.00th=[ 8094], 40.00th=[ 17695], | 50.00th=[ 27657], 60.00th=[ 36963], 70.00th=[ 49546], | 80.00th=[ 66323], 90.00th=[ 87557], 95.00th=[ 106431], | 99.00th=[ 156238], 99.50th=[ 202376], 99.90th=[ 583009], | 99.95th=[1082131], 99.99th=[1082131] bw ( KiB/s): min= 6, max= 125, per=26.07%, avg=55.26, stdev=21.90, samples=225 iops : min= 1, max= 31, avg=13.20, stdev= 5.52, samples=225 lat (usec) : 50=0.46%, 100=3.94%, 250=0.26%, 500=0.13%, 750=0.07% lat (usec) : 1000=0.16% lat (msec) : 2=6.61%, 4=4.20%, 10=6.80%, 20=11.62%, 50=38.51% lat (msec) : 100=22.79%, 250=4.33%, 500=0.07%, 750=0.03%, 2000=0.03% cpu : usr=0.08%, sys=4.92%, ctx=6411, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1485,1587,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145478: Thu Aug 27 18:33:39 2026 read: IOPS=12, BW=51.1KiB/s (52.3kB/s)(6028KiB/118033msec) clat (usec): min=26, max=295030, avg=38109.97, stdev=28803.95 lat (usec): min=26, max=295032, avg=38113.42, stdev=28803.05 clat percentiles (usec): | 1.00th=[ 48], 5.00th=[ 59], 10.00th=[ 9241], 20.00th=[ 18220], | 30.00th=[ 22676], 40.00th=[ 26870], 50.00th=[ 32113], 60.00th=[ 38011], | 70.00th=[ 46400], 80.00th=[ 55837], 90.00th=[ 73925], 95.00th=[ 89654], | 99.00th=[129500], 99.50th=[173016], 99.90th=[210764], 99.95th=[295699], | 99.99th=[295699] bw ( KiB/s): min= 7, max= 134, per=25.62%, avg=52.00, stdev=22.96, samples=227 iops : min= 1, max= 33, avg=12.37, stdev= 5.80, samples=227 write: IOPS=13, BW=53.0KiB/s (54.3kB/s)(6260KiB/118033msec); 0 zone resets clat (usec): min=627, max=1202.8k, avg=38366.98, stdev=48545.19 lat (usec): min=628, max=1202.8k, avg=38370.87, stdev=48546.09 clat percentiles (usec): | 1.00th=[ 1074], 5.00th=[ 1221], 10.00th=[ 1565], | 20.00th=[ 3458], 30.00th=[ 7111], 40.00th=[ 16909], | 50.00th=[ 28181], 60.00th=[ 38011], 70.00th=[ 50594], | 80.00th=[ 64750], 90.00th=[ 90702], 95.00th=[ 111674], | 99.00th=[ 173016], 99.50th=[ 202376], 99.90th=[ 244319], | 99.95th=[1199571], 99.99th=[1199571] bw ( KiB/s): min= 7, max= 104, per=25.04%, avg=53.09, stdev=19.74, samples=231 iops : min= 1, max= 26, avg=12.65, stdev= 4.96, samples=231 lat (usec) : 50=0.78%, 100=3.32%, 250=0.33%, 500=0.16%, 750=0.10% lat (usec) : 1000=0.16% lat (msec) : 2=6.48%, 4=4.79%, 10=5.92%, 20=11.49%, 50=38.31% lat (msec) : 100=22.92%, 250=5.18%, 500=0.03%, 2000=0.03% cpu : usr=0.08%, sys=4.96%, ctx=6405, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145479: Thu Aug 27 18:33:39 2026 read: IOPS=13, BW=52.2KiB/s (53.5kB/s)(6052KiB/115942msec) clat (usec): min=26, max=361814, avg=37212.66, stdev=30764.61 lat (usec): min=26, max=361815, avg=37214.78, stdev=30764.39 clat percentiles (usec): | 1.00th=[ 45], 5.00th=[ 57], 10.00th=[ 81], 20.00th=[ 17171], | 30.00th=[ 21365], 40.00th=[ 26346], 50.00th=[ 31065], 60.00th=[ 37487], | 70.00th=[ 46400], 80.00th=[ 56361], 90.00th=[ 69731], 95.00th=[ 85459], | 99.00th=[147850], 99.50th=[196084], 99.90th=[308282], 99.95th=[362808], | 99.99th=[362808] bw ( KiB/s): min= 8, max= 111, per=25.95%, avg=52.68, stdev=20.27, samples=225 iops : min= 2, max= 27, avg=12.54, stdev= 5.11, samples=225 write: IOPS=13, BW=53.8KiB/s (55.1kB/s)(6236KiB/115942msec); 0 zone resets clat (usec): min=697, max=1234.5k, avg=37905.66, stdev=47277.60 lat (usec): min=697, max=1234.5k, avg=37913.32, stdev=47275.44 clat percentiles (usec): | 1.00th=[ 1057], 5.00th=[ 1188], 10.00th=[ 1483], | 20.00th=[ 3851], 30.00th=[ 8586], 40.00th=[ 19006], | 50.00th=[ 28705], 60.00th=[ 38011], 70.00th=[ 51643], | 80.00th=[ 65274], 90.00th=[ 84411], 95.00th=[ 102237], | 99.00th=[ 160433], 99.50th=[ 189793], 99.90th=[ 231736], | 99.95th=[1233126], 99.99th=[1233126] bw ( KiB/s): min= 7, max= 127, per=25.36%, avg=53.76, stdev=20.50, samples=227 iops : min= 1, max= 31, avg=12.82, stdev= 5.16, samples=227 lat (usec) : 50=0.81%, 100=4.33%, 250=0.26%, 500=0.07%, 750=0.10% lat (usec) : 1000=0.16% lat (msec) : 2=6.32%, 4=4.04%, 10=6.35%, 20=11.82%, 50=37.70% lat (msec) : 100=24.09%, 250=3.84%, 500=0.10%, 2000=0.03% cpu : usr=0.08%, sys=4.97%, ctx=6284, 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=203KiB/s (208kB/s), 50.7KiB/s-52.2KiB/s (51.9kB/s-53.5kB/s), io=23.4MiB (24.6MB), run=114593-118283msec WRITE: bw=213KiB/s (218kB/s), 53.0KiB/s-55.4KiB/s (54.3kB/s-56.7kB/s), io=24.6MiB (25.7MB), run=114593-118283msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145472: Thu Aug 27 18:35:59 2026 read: IOPS=5, BW=23.5KiB/s (24.0kB/s)(5992KiB/255240msec) clat (msec): min=4, max=944, avg=33.04, stdev=43.24 lat (msec): min=4, max=944, avg=33.04, stdev=43.24 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 10], 20.00th=[ 13], | 30.00th=[ 16], 40.00th=[ 18], 50.00th=[ 22], 60.00th=[ 26], | 70.00th=[ 32], 80.00th=[ 43], 90.00th=[ 71], 95.00th=[ 99], | 99.00th=[ 161], 99.50th=[ 207], 99.90th=[ 760], 99.95th=[ 944], | 99.99th=[ 944] bw ( KiB/s): min= 7, max= 104, per=28.41%, avg=26.14, stdev=17.31, samples=443 iops : min= 1, max= 26, avg= 5.92, stdev= 4.38, samples=443 write: IOPS=6, BW=24.7KiB/s (25.3kB/s)(6296KiB/255240msec); 0 zone resets clat (msec): min=39, max=469, avg=130.38, stdev=56.27 lat (msec): min=39, max=469, avg=130.39, stdev=56.27 clat percentiles (msec): | 1.00th=[ 45], 5.00th=[ 58], 10.00th=[ 69], 20.00th=[ 83], | 30.00th=[ 96], 40.00th=[ 109], 50.00th=[ 121], 60.00th=[ 134], | 70.00th=[ 150], 80.00th=[ 171], 90.00th=[ 203], 95.00th=[ 234], | 99.00th=[ 305], 99.50th=[ 355], 99.90th=[ 426], 99.95th=[ 472], | 99.99th=[ 472] bw ( KiB/s): min= 7, max= 56, per=25.04%, avg=24.29, stdev=10.33, samples=499 iops : min= 1, max= 14, avg= 5.45, stdev= 2.63, samples=499 lat (msec) : 10=5.27%, 20=17.19%, 50=19.37%, 100=21.52%, 250=34.67% lat (msec) : 500=1.92%, 1000=0.07% cpu : usr=0.04%, sys=1.04%, ctx=4859, 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=145473: Thu Aug 27 18:35:59 2026 read: IOPS=5, BW=22.0KiB/s (23.5kB/s)(5940KiB/258719msec) clat (msec): min=5, max=1106, avg=33.36, stdev=46.18 lat (msec): min=5, max=1106, avg=33.36, stdev=46.18 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 13], | 30.00th=[ 16], 40.00th=[ 19], 50.00th=[ 22], 60.00th=[ 26], | 70.00th=[ 32], 80.00th=[ 44], 90.00th=[ 69], 95.00th=[ 94], | 99.00th=[ 167], 99.50th=[ 205], 99.90th=[ 776], 99.95th=[ 1099], | 99.99th=[ 1099] bw ( KiB/s): min= 7, max= 104, per=27.72%, avg=25.50, stdev=17.04, samples=450 iops : min= 1, max= 26, avg= 5.77, stdev= 4.31, samples=450 write: IOPS=6, BW=24.5KiB/s (25.1kB/s)(6348KiB/258719msec); 0 zone resets clat (msec): min=34, max=473, avg=131.52, stdev=57.73 lat (msec): min=34, max=473, avg=131.52, stdev=57.73 clat percentiles (msec): | 1.00th=[ 47], 5.00th=[ 59], 10.00th=[ 69], 20.00th=[ 86], | 30.00th=[ 97], 40.00th=[ 109], 50.00th=[ 122], 60.00th=[ 136], | 70.00th=[ 153], 80.00th=[ 171], 90.00th=[ 203], 95.00th=[ 243], | 99.00th=[ 326], 99.50th=[ 338], 99.90th=[ 426], 99.95th=[ 472], | 99.99th=[ 472] bw ( KiB/s): min= 7, max= 72, per=24.90%, avg=24.15, stdev=10.49, samples=506 iops : min= 1, max= 18, avg= 5.42, stdev= 2.68, samples=506 lat (msec) : 10=4.26%, 20=17.97%, 50=19.47%, 100=21.35%, 250=34.44% lat (msec) : 500=2.44%, 1000=0.03%, 2000=0.03% cpu : usr=0.04%, sys=1.11%, ctx=4951, 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=145474: Thu Aug 27 18:35:59 2026 read: IOPS=5, BW=23.7KiB/s (24.2kB/s)(6028KiB/254716msec) clat (msec): min=5, max=275, avg=32.46, stdev=32.04 lat (msec): min=5, max=275, avg=32.46, stdev=32.04 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 13], | 30.00th=[ 16], 40.00th=[ 19], 50.00th=[ 22], 60.00th=[ 27], | 70.00th=[ 32], 80.00th=[ 43], 90.00th=[ 69], 95.00th=[ 95], | 99.00th=[ 165], 99.50th=[ 215], 99.90th=[ 275], 99.95th=[ 275], | 99.99th=[ 275] bw ( KiB/s): min= 7, max= 120, per=27.05%, avg=24.88, stdev=17.57, samples=468 iops : min= 1, max= 30, avg= 5.60, stdev= 4.44, samples=468 write: IOPS=6, BW=24.6KiB/s (25.2kB/s)(6260KiB/254716msec); 0 zone resets clat (msec): min=32, max=1268, avg=131.22, stdev=65.44 lat (msec): min=32, max=1268, avg=131.22, stdev=65.44 clat percentiles (msec): | 1.00th=[ 45], 5.00th=[ 60], 10.00th=[ 69], 20.00th=[ 84], | 30.00th=[ 95], 40.00th=[ 108], 50.00th=[ 120], 60.00th=[ 136], | 70.00th=[ 153], 80.00th=[ 171], 90.00th=[ 205], 95.00th=[ 234], | 99.00th=[ 313], 99.50th=[ 338], 99.90th=[ 760], 99.95th=[ 1267], | 99.99th=[ 1267] bw ( KiB/s): min= 7, max= 55, per=24.87%, avg=24.13, stdev=10.19, samples=500 iops : min= 1, max= 13, avg= 5.42, stdev= 2.61, samples=500 lat (msec) : 10=4.79%, 20=17.22%, 50=20.15%, 100=22.10%, 250=33.63% lat (msec) : 500=2.05%, 1000=0.03%, 2000=0.03% cpu : usr=0.04%, sys=1.09%, ctx=4921, 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=145477: Thu Aug 27 18:35:59 2026 read: IOPS=5, BW=23.8KiB/s (24.4kB/s)(6052KiB/254342msec) clat (msec): min=4, max=631, avg=32.13, stdev=35.14 lat (msec): min=4, max=631, avg=32.13, stdev=35.14 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 16], 40.00th=[ 19], 50.00th=[ 22], 60.00th=[ 26], | 70.00th=[ 32], 80.00th=[ 43], 90.00th=[ 66], 95.00th=[ 93], | 99.00th=[ 150], 99.50th=[ 234], 99.90th=[ 338], 99.95th=[ 634], | 99.99th=[ 634] bw ( KiB/s): min= 7, max= 95, per=28.43%, avg=26.16, stdev=17.69, samples=448 iops : min= 1, max= 23, avg= 5.92, stdev= 4.48, samples=448 write: IOPS=6, BW=24.5KiB/s (25.1kB/s)(6236KiB/254342msec); 0 zone resets clat (msec): min=36, max=1213, avg=131.66, stdev=62.52 lat (msec): min=36, max=1213, avg=131.66, stdev=62.52 clat percentiles (msec): | 1.00th=[ 48], 5.00th=[ 61], 10.00th=[ 69], 20.00th=[ 84], | 30.00th=[ 95], 40.00th=[ 108], 50.00th=[ 122], 60.00th=[ 136], | 70.00th=[ 153], 80.00th=[ 174], 90.00th=[ 205], 95.00th=[ 241], | 99.00th=[ 309], 99.50th=[ 338], 99.90th=[ 430], 99.95th=[ 1217], | 99.99th=[ 1217] bw ( KiB/s): min= 7, max= 56, per=24.88%, avg=24.13, stdev= 9.94, samples=499 iops : min= 1, max= 14, avg= 5.42, stdev= 2.55, samples=499 lat (msec) : 10=4.52%, 20=17.94%, 50=19.34%, 100=22.53%, 250=33.40% lat (msec) : 500=2.21%, 750=0.03%, 2000=0.03% cpu : usr=0.04%, sys=1.08%, ctx=5051, 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=92.8KiB/s (95.0kB/s), 22.0KiB/s-23.8KiB/s (23.5kB/s-24.4kB/s), io=23.4MiB (24.6MB), run=254342-258719msec WRITE: bw=97.2KiB/s (99.5kB/s), 24.5KiB/s-24.7KiB/s (25.1kB/s-25.3kB/s), io=24.6MiB (25.7MB), run=254342-258719msec 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=145533: Thu Aug 27 18:36:37 2026 read: IOPS=14, BW=230KiB/s (235kB/s)(5920KiB/25766msec) clat (usec): min=33, max=328028, avg=33693.47, stdev=33933.43 lat (usec): min=33, max=328161, avg=33695.07, stdev=33936.44 clat percentiles (usec): | 1.00th=[ 39], 5.00th=[ 55], 10.00th=[ 60], 20.00th=[ 73], | 30.00th=[ 1221], 40.00th=[ 23462], 50.00th=[ 30016], 60.00th=[ 38536], | 70.00th=[ 49021], 80.00th=[ 56361], 90.00th=[ 70779], 95.00th=[ 83362], | 99.00th=[139461], 99.50th=[162530], 99.90th=[329253], 99.95th=[329253], | 99.99th=[329253] bw ( KiB/s): min= 61, max= 492, per=24.42%, avg=224.94, stdev=98.63, samples=50 iops : min= 3, max= 30, avg=13.32, stdev= 6.20, samples=50 write: IOPS=15, BW=247KiB/s (253kB/s)(6368KiB/25766msec); 0 zone resets clat (usec): min=1408, max=199906, avg=33255.87, stdev=36841.93 lat (usec): min=1412, max=199908, avg=33279.12, stdev=36890.80 clat percentiles (usec): | 1.00th=[ 1565], 5.00th=[ 1827], 10.00th=[ 2343], 20.00th=[ 4555], | 30.00th=[ 7177], 40.00th=[ 11469], 50.00th=[ 19792], 60.00th=[ 30016], | 70.00th=[ 39584], 80.00th=[ 56361], 90.00th=[ 87557], 95.00th=[108528], | 99.00th=[175113], 99.50th=[196084], 99.90th=[200279], 99.95th=[200279], | 99.99th=[200279] bw ( KiB/s): min= 63, max= 553, per=25.21%, avg=244.26, stdev=95.50, samples=50 iops : min= 3, max= 34, avg=14.56, stdev= 6.07, samples=50 lat (usec) : 50=1.95%, 100=10.42%, 250=1.30%, 500=0.39%, 750=0.26% lat (msec) : 2=4.30%, 4=5.99%, 10=9.64%, 20=9.64%, 50=29.56% lat (msec) : 100=21.35%, 250=5.08%, 500=0.13% cpu : usr=0.07%, sys=5.52%, ctx=1313, 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=145534: Thu Aug 27 18:36:37 2026 read: IOPS=13, BW=221KiB/s (226kB/s)(5744KiB/25995msec) clat (usec): min=32, max=189537, avg=33628.55, stdev=31394.86 lat (usec): min=32, max=189538, avg=33629.70, stdev=31394.85 clat percentiles (usec): | 1.00th=[ 39], 5.00th=[ 55], 10.00th=[ 58], 20.00th=[ 75], | 30.00th=[ 1336], 40.00th=[ 23987], 50.00th=[ 31851], 60.00th=[ 38011], | 70.00th=[ 46400], 80.00th=[ 56886], 90.00th=[ 72877], 95.00th=[ 86508], | 99.00th=[135267], 99.50th=[160433], 99.90th=[189793], 99.95th=[189793], | 99.99th=[189793] bw ( KiB/s): min= 31, max= 479, per=24.67%, avg=227.22, stdev=114.81, samples=49 iops : min= 1, max= 29, avg=13.51, stdev= 7.22, samples=49 write: IOPS=15, BW=252KiB/s (258kB/s)(6544KiB/25995msec); 0 zone resets clat (usec): min=1282, max=476787, avg=33923.56, stdev=47281.87 lat (usec): min=1284, max=476789, avg=33925.73, stdev=47281.85 clat percentiles (usec): | 1.00th=[ 1483], 5.00th=[ 1680], 10.00th=[ 2073], 20.00th=[ 3982], | 30.00th=[ 5997], 40.00th=[ 9372], 50.00th=[ 16909], 60.00th=[ 25297], | 70.00th=[ 39584], 80.00th=[ 58983], 90.00th=[ 84411], 95.00th=[107480], | 99.00th=[221250], 99.50th=[295699], 99.90th=[476054], 99.95th=[476054], | 99.99th=[476054] bw ( KiB/s): min= 61, max= 462, per=26.25%, avg=254.36, stdev=115.25, samples=50 iops : min= 3, max= 28, avg=15.20, stdev= 7.31, samples=50 lat (usec) : 50=1.56%, 100=10.29%, 250=1.04%, 500=0.65%, 750=0.13% lat (msec) : 2=5.60%, 4=5.60%, 10=11.59%, 20=7.94%, 50=30.47% lat (msec) : 100=20.70%, 250=4.04%, 500=0.39% cpu : usr=0.08%, sys=5.81%, ctx=1359, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=359,409,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145535: Thu Aug 27 18:36:37 2026 read: IOPS=15, BW=245KiB/s (251kB/s)(6256KiB/25573msec) clat (usec): min=33, max=324983, avg=34010.12, stdev=34521.49 lat (usec): min=33, max=324996, avg=34011.47, stdev=34521.86 clat percentiles (usec): | 1.00th=[ 38], 5.00th=[ 53], 10.00th=[ 57], 20.00th=[ 70], | 30.00th=[ 1549], 40.00th=[ 22938], 50.00th=[ 28705], 60.00th=[ 36963], | 70.00th=[ 45876], 80.00th=[ 59507], 90.00th=[ 74974], 95.00th=[ 92799], | 99.00th=[139461], 99.50th=[143655], 99.90th=[325059], 99.95th=[325059], | 99.99th=[325059] bw ( KiB/s): min= 61, max= 475, per=26.75%, avg=246.36, stdev=94.55, samples=50 iops : min= 3, max= 29, avg=14.70, stdev= 6.00, samples=50 write: IOPS=14, BW=236KiB/s (242kB/s)(6032KiB/25573msec); 0 zone resets clat (usec): min=1400, max=233093, avg=32401.03, stdev=36134.23 lat (usec): min=1401, max=233095, avg=32404.77, stdev=36134.19 clat percentiles (usec): | 1.00th=[ 1450], 5.00th=[ 1663], 10.00th=[ 2073], 20.00th=[ 4424], | 30.00th=[ 7308], 40.00th=[ 10814], 50.00th=[ 17433], 60.00th=[ 27657], | 70.00th=[ 40633], 80.00th=[ 58983], 90.00th=[ 84411], 95.00th=[101188], | 99.00th=[158335], 99.50th=[208667], 99.90th=[233833], 99.95th=[233833], | 99.99th=[233833] bw ( KiB/s): min= 31, max= 506, per=24.16%, avg=234.10, stdev=92.83, samples=50 iops : min= 1, max= 31, avg=13.94, stdev= 5.84, samples=50 lat (usec) : 50=2.08%, 100=11.59%, 250=0.78%, 500=0.65%, 1000=0.13% lat (msec) : 2=4.82%, 4=4.43%, 10=9.38%, 20=10.81%, 50=29.69% lat (msec) : 100=21.09%, 250=4.43%, 500=0.13% cpu : usr=0.09%, sys=5.52%, ctx=1341, 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=145536: Thu Aug 27 18:36:37 2026 read: IOPS=15, BW=242KiB/s (248kB/s)(6032KiB/24882msec) clat (usec): min=32, max=220123, avg=32797.25, stdev=31864.17 lat (usec): min=32, max=220124, avg=32798.35, stdev=31864.23 clat percentiles (usec): | 1.00th=[ 40], 5.00th=[ 46], 10.00th=[ 58], 20.00th=[ 70], | 30.00th=[ 253], 40.00th=[ 22676], 50.00th=[ 30540], 60.00th=[ 36439], | 70.00th=[ 45876], 80.00th=[ 58459], 90.00th=[ 71828], 95.00th=[ 87557], | 99.00th=[133694], 99.50th=[166724], 99.90th=[219153], 99.95th=[219153], | 99.99th=[219153] bw ( KiB/s): min= 32, max= 509, per=26.62%, avg=245.19, stdev=100.18, samples=48 iops : min= 2, max= 31, avg=14.65, stdev= 6.26, samples=48 write: IOPS=15, BW=251KiB/s (257kB/s)(6256KiB/24882msec); 0 zone resets clat (usec): min=1104, max=272477, avg=31904.36, stdev=40073.35 lat (usec): min=1106, max=272479, avg=31906.97, stdev=40072.96 clat percentiles (usec): | 1.00th=[ 1319], 5.00th=[ 1729], 10.00th=[ 2212], 20.00th=[ 3720], | 30.00th=[ 5604], 40.00th=[ 9372], 50.00th=[ 15926], 60.00th=[ 27132], | 70.00th=[ 38011], 80.00th=[ 56886], 90.00th=[ 80217], 95.00th=[101188], | 99.00th=[208667], 99.50th=[261096], 99.90th=[270533], 99.95th=[270533], | 99.99th=[270533] bw ( KiB/s): min= 63, max= 416, per=26.00%, avg=251.96, stdev=89.01, samples=49 iops : min= 3, max= 26, avg=15.06, stdev= 5.64, samples=49 lat (usec) : 50=2.86%, 100=11.07%, 250=0.78%, 500=0.13%, 750=0.39% lat (usec) : 1000=0.13% lat (msec) : 2=4.82%, 4=7.03%, 10=10.03%, 20=7.68%, 50=30.21% lat (msec) : 100=20.83%, 250=3.78%, 500=0.26% cpu : usr=0.07%, sys=5.69%, ctx=1280, 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=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=921KiB/s (944kB/s), 221KiB/s-245KiB/s (226kB/s-251kB/s), io=23.4MiB (24.5MB), run=24882-25995msec WRITE: bw=969KiB/s (993kB/s), 236KiB/s-252KiB/s (242kB/s-258kB/s), io=24.6MiB (25.8MB), run=24882-25995msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145528: Thu Aug 27 18:37:12 2026 read: IOPS=5, BW=95.3KiB/s (97.6kB/s)(5920KiB/62105msec) clat (msec): min=6, max=290, avg=36.58, stdev=37.68 lat (msec): min=6, max=290, avg=36.58, stdev=37.68 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 17], 40.00th=[ 20], 50.00th=[ 23], 60.00th=[ 27], | 70.00th=[ 35], 80.00th=[ 49], 90.00th=[ 79], 95.00th=[ 110], | 99.00th=[ 199], 99.50th=[ 247], 99.90th=[ 292], 99.95th=[ 292], | 99.99th=[ 292] bw ( KiB/s): min= 31, max= 351, per=27.87%, avg=107.31, stdev=67.37, samples=107 iops : min= 1, max= 21, avg= 5.95, stdev= 4.23, samples=107 write: IOPS=6, BW=103KiB/s (105kB/s)(6368KiB/62105msec); 0 zone resets clat (msec): min=30, max=388, avg=121.58, stdev=57.72 lat (msec): min=30, max=388, avg=121.58, stdev=57.72 clat percentiles (msec): | 1.00th=[ 44], 5.00th=[ 54], 10.00th=[ 61], 20.00th=[ 72], | 30.00th=[ 84], 40.00th=[ 94], 50.00th=[ 106], 60.00th=[ 123], | 70.00th=[ 144], 80.00th=[ 169], 90.00th=[ 203], 95.00th=[ 236], | 99.00th=[ 296], 99.50th=[ 338], 99.90th=[ 388], 99.95th=[ 388], | 99.99th=[ 388] bw ( KiB/s): min= 29, max= 224, per=25.15%, avg=101.86, stdev=49.69, samples=122 iops : min= 1, max= 14, avg= 5.60, stdev= 3.17, samples=122 lat (msec) : 10=2.34%, 20=17.19%, 50=20.31%, 100=28.39%, 250=29.95% lat (msec) : 500=1.82% cpu : usr=0.03%, sys=1.29%, ctx=1285, 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=145529: Thu Aug 27 18:37:12 2026 read: IOPS=5, BW=92.9KiB/s (95.1kB/s)(5744KiB/61847msec) clat (msec): min=6, max=196, avg=34.47, stdev=32.49 lat (msec): min=6, max=196, avg=34.47, stdev=32.49 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 19], 50.00th=[ 22], 60.00th=[ 27], | 70.00th=[ 34], 80.00th=[ 50], 90.00th=[ 84], 95.00th=[ 114], | 99.00th=[ 153], 99.50th=[ 171], 99.90th=[ 197], 99.95th=[ 197], | 99.99th=[ 197] bw ( KiB/s): min= 30, max= 319, per=27.79%, avg=106.98, stdev=67.78, samples=105 iops : min= 1, max= 19, avg= 5.90, stdev= 4.30, samples=105 write: IOPS=6, BW=106KiB/s (108kB/s)(6544KiB/61847msec); 0 zone resets clat (msec): min=32, max=417, avg=120.77, stdev=58.39 lat (msec): min=32, max=417, avg=120.78, stdev=58.40 clat percentiles (msec): | 1.00th=[ 41], 5.00th=[ 54], 10.00th=[ 63], 20.00th=[ 77], | 30.00th=[ 86], 40.00th=[ 97], 50.00th=[ 110], 60.00th=[ 121], | 70.00th=[ 134], 80.00th=[ 157], 90.00th=[ 194], 95.00th=[ 241], | 99.00th=[ 321], 99.50th=[ 351], 99.90th=[ 418], 99.95th=[ 418], | 99.99th=[ 418] bw ( KiB/s): min= 31, max= 255, per=26.36%, avg=106.75, stdev=47.46, samples=120 iops : min= 1, max= 15, avg= 5.89, stdev= 3.03, samples=120 lat (msec) : 10=3.91%, 20=17.32%, 50=18.62%, 100=26.30%, 250=31.51% lat (msec) : 500=2.34% cpu : usr=0.03%, sys=1.14%, ctx=1136, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=359,409,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145530: Thu Aug 27 18:37:12 2026 read: IOPS=6, BW=103KiB/s (106kB/s)(6256KiB/60502msec) clat (msec): min=6, max=249, avg=32.59, stdev=29.76 lat (msec): min=6, max=249, avg=32.59, stdev=29.76 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 10], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 20], 50.00th=[ 23], 60.00th=[ 28], | 70.00th=[ 34], 80.00th=[ 46], 90.00th=[ 66], 95.00th=[ 94], | 99.00th=[ 159], 99.50th=[ 180], 99.90th=[ 249], 99.95th=[ 249], | 99.99th=[ 249] bw ( KiB/s): min= 30, max= 447, per=28.91%, avg=111.29, stdev=78.82, samples=111 iops : min= 1, max= 27, avg= 6.21, stdev= 4.97, samples=111 write: IOPS=6, BW=99.7KiB/s (102kB/s)(6032KiB/60502msec); 0 zone resets clat (msec): min=40, max=394, avg=126.25, stdev=58.56 lat (msec): min=40, max=394, avg=126.25, stdev=58.56 clat percentiles (msec): | 1.00th=[ 45], 5.00th=[ 61], 10.00th=[ 68], 20.00th=[ 78], | 30.00th=[ 88], 40.00th=[ 97], 50.00th=[ 111], 60.00th=[ 128], | 70.00th=[ 146], 80.00th=[ 174], 90.00th=[ 207], 95.00th=[ 243], | 99.00th=[ 321], 99.50th=[ 326], 99.90th=[ 397], 99.95th=[ 397], | 99.99th=[ 397] bw ( KiB/s): min= 29, max= 223, per=24.69%, avg=99.99, stdev=44.29, samples=118 iops : min= 1, max= 13, avg= 5.49, stdev= 2.83, samples=118 lat (msec) : 10=3.26%, 20=18.62%, 50=21.74%, 100=25.91%, 250=28.13% lat (msec) : 500=2.34% cpu : usr=0.03%, sys=1.28%, ctx=1286, 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=145531: Thu Aug 27 18:37:12 2026 read: IOPS=6, BW=98.2KiB/s (101kB/s)(6032KiB/61442msec) clat (msec): min=5, max=259, avg=33.55, stdev=33.22 lat (msec): min=5, max=259, avg=33.55, stdev=33.22 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 16], 40.00th=[ 20], 50.00th=[ 23], 60.00th=[ 27], | 70.00th=[ 32], 80.00th=[ 43], 90.00th=[ 73], 95.00th=[ 105], | 99.00th=[ 176], 99.50th=[ 211], 99.90th=[ 259], 99.95th=[ 259], | 99.99th=[ 259] bw ( KiB/s): min= 31, max= 349, per=26.35%, avg=101.47, stdev=70.36, samples=116 iops : min= 1, max= 21, avg= 5.59, stdev= 4.44, samples=116 write: IOPS=6, BW=102KiB/s (104kB/s)(6256KiB/61442msec); 0 zone resets clat (msec): min=34, max=371, avg=124.23, stdev=61.43 lat (msec): min=34, max=371, avg=124.23, stdev=61.43 clat percentiles (msec): | 1.00th=[ 45], 5.00th=[ 55], 10.00th=[ 63], 20.00th=[ 77], | 30.00th=[ 86], 40.00th=[ 96], 50.00th=[ 108], 60.00th=[ 123], | 70.00th=[ 142], 80.00th=[ 163], 90.00th=[ 207], 95.00th=[ 239], | 99.00th=[ 342], 99.50th=[ 355], 99.90th=[ 372], 99.95th=[ 372], | 99.99th=[ 372] bw ( KiB/s): min= 31, max= 224, per=25.31%, avg=102.49, stdev=48.40, samples=120 iops : min= 1, max= 14, avg= 5.64, stdev= 3.08, samples=120 lat (msec) : 10=3.91%, 20=16.93%, 50=21.48%, 100=26.04%, 250=29.30% lat (msec) : 500=2.34% cpu : usr=0.04%, sys=1.27%, ctx=1298, 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=386KiB/s (395kB/s), 92.9KiB/s-103KiB/s (95.1kB/s-106kB/s), io=23.4MiB (24.5MB), run=60502-62105msec WRITE: bw=406KiB/s (416kB/s), 99.7KiB/s-106KiB/s (102kB/s-108kB/s), io=24.6MiB (25.8MB), run=60502-62105msec 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=145550: Thu Aug 27 18:37:29 2026 read: IOPS=0, BW=857KiB/s (877kB/s)(7168KiB/8365msec) clat (usec): min=481, max=427308, avg=264878.88, stdev=143946.33 lat (usec): min=482, max=427309, avg=264880.37, stdev=143946.36 clat percentiles (usec): | 1.00th=[ 482], 5.00th=[ 482], 10.00th=[ 482], 20.00th=[204473], | 30.00th=[208667], 40.00th=[208667], 50.00th=[291505], 60.00th=[329253], | 70.00th=[329253], 80.00th=[392168], 90.00th=[425722], 95.00th=[425722], | 99.00th=[425722], 99.50th=[425722], 99.90th=[425722], 99.95th=[425722], | 99.99th=[425722] bw ( KiB/s): min= 1703, max= 4079, per=100.00%, avg=2914.75, stdev=1267.93, samples=4 iops : min= 1, max= 3, avg= 2.00, stdev= 1.15, samples=4 write: IOPS=0, BW=612KiB/s (627kB/s)(5120KiB/8365msec); 0 zone resets clat (msec): min=202, max=4642, avg=1263.62, stdev=1893.28 lat (msec): min=203, max=4642, avg=1263.95, stdev=1893.11 clat percentiles (msec): | 1.00th=[ 203], 5.00th=[ 203], 10.00th=[ 203], 20.00th=[ 203], | 30.00th=[ 468], 40.00th=[ 468], 50.00th=[ 493], 60.00th=[ 493], | 70.00th=[ 518], 80.00th=[ 518], 90.00th=[ 4665], 95.00th=[ 4665], | 99.00th=[ 4665], 99.50th=[ 4665], 99.90th=[ 4665], 99.95th=[ 4665], | 99.99th=[ 4665] bw ( KiB/s): min= 1848, max= 2027, per=60.93%, avg=1948.50, stdev=76.04, samples=4 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=4 lat (usec) : 500=8.33% lat (msec) : 250=25.00%, 500=50.00%, 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=6.38%, ctx=312, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=7,5,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145551: Thu Aug 27 18:37:29 2026 read: IOPS=0, BW=228KiB/s (234kB/s)(2048KiB/8964msec) clat (msec): min=218, max=249, avg=233.70, stdev=22.13 lat (msec): min=218, max=249, avg=233.70, stdev=22.13 clat percentiles (msec): | 1.00th=[ 218], 5.00th=[ 218], 10.00th=[ 218], 20.00th=[ 218], | 30.00th=[ 218], 40.00th=[ 218], 50.00th=[ 218], 60.00th=[ 249], | 70.00th=[ 249], 80.00th=[ 249], 90.00th=[ 249], 95.00th=[ 249], | 99.00th=[ 249], 99.50th=[ 249], 99.90th=[ 249], 99.95th=[ 249], | 99.99th=[ 249] bw ( KiB/s): min= 1741, max= 1992, per=81.72%, avg=1866.50, stdev=177.48, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1142KiB/s (1170kB/s)(10.0MiB/8964msec); 0 zone resets clat (msec): min=202, max=3341, avg=833.25, stdev=927.63 lat (msec): min=202, max=3341, avg=833.66, stdev=927.57 clat percentiles (msec): | 1.00th=[ 203], 5.00th=[ 203], 10.00th=[ 203], 20.00th=[ 321], | 30.00th=[ 418], 40.00th=[ 447], 50.00th=[ 489], 60.00th=[ 493], | 70.00th=[ 617], 80.00th=[ 743], 90.00th=[ 1267], 95.00th=[ 3339], | 99.00th=[ 3339], 99.50th=[ 3339], 99.90th=[ 3339], 99.95th=[ 3339], | 99.99th=[ 3339] bw ( KiB/s): min= 1848, max= 3984, per=69.91%, avg=2235.75, stdev=709.30, samples=8 iops : min= 1, max= 3, avg= 1.25, stdev= 0.71, samples=8 lat (msec) : 250=25.00%, 500=41.67%, 750=16.67%, 2000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=7.12%, ctx=222, 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=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=145552: Thu Aug 27 18:37:29 2026 read: IOPS=0, BW=761KiB/s (779kB/s)(6144KiB/8074msec) clat (usec): min=500, max=4139.9k, avg=826023.64, stdev=1636771.77 lat (usec): min=501, max=4139.9k, avg=826024.84, stdev=1636771.83 clat percentiles (usec): | 1.00th=[ 502], 5.00th=[ 502], 10.00th=[ 502], | 20.00th=[ 676], 30.00th=[ 676], 40.00th=[ 783], | 50.00th=[ 783], 60.00th=[ 312476], 70.00th=[ 501220], | 80.00th=[ 501220], 90.00th=[4143973], 95.00th=[4143973], | 99.00th=[4143973], 99.50th=[4143973], 99.90th=[4143973], | 99.95th=[4143973], 99.99th=[4143973] bw ( KiB/s): min= 1939, max= 2039, per=87.40%, avg=1996.25, stdev=45.88, samples=4 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=4 write: IOPS=0, BW=761KiB/s (779kB/s)(6144KiB/8074msec); 0 zone resets clat (msec): min=154, max=1478, avg=505.33, stdev=505.82 lat (msec): min=154, max=1478, avg=505.43, stdev=505.84 clat percentiles (msec): | 1.00th=[ 155], 5.00th=[ 155], 10.00th=[ 155], 20.00th=[ 155], | 30.00th=[ 155], 40.00th=[ 247], 50.00th=[ 247], 60.00th=[ 401], | 70.00th=[ 600], 80.00th=[ 600], 90.00th=[ 1485], 95.00th=[ 1485], | 99.00th=[ 1485], 99.50th=[ 1485], 99.90th=[ 1485], 99.95th=[ 1485], | 99.99th=[ 1485] bw ( KiB/s): min= 1492, max= 2027, per=58.38%, avg=1867.00, stdev=251.26, samples=4 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=4 lat (usec) : 750=16.67%, 1000=8.33% lat (msec) : 250=25.00%, 500=16.67%, 750=16.67%, 2000=8.33%, >=2000=8.33% cpu : usr=0.01%, sys=6.52%, ctx=581, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=6,6,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145553: Thu Aug 27 18:37:29 2026 read: IOPS=1, BW=1296KiB/s (1327kB/s)(5120KiB/3952msec) clat (usec): min=573, max=263826, avg=53536.75, stdev=117556.07 lat (usec): min=574, max=263826, avg=53537.84, stdev=117555.70 clat percentiles (usec): | 1.00th=[ 570], 5.00th=[ 570], 10.00th=[ 570], 20.00th=[ 570], | 30.00th=[ 578], 40.00th=[ 578], 50.00th=[ 1205], 60.00th=[ 1205], | 70.00th=[ 1516], 80.00th=[ 1516], 90.00th=[263193], 95.00th=[263193], | 99.00th=[263193], 99.50th=[263193], 99.90th=[263193], 99.95th=[263193], | 99.99th=[263193] bw ( KiB/s): min= 8110, max= 8110, per=100.00%, avg=8110.00, stdev= 0.00, samples=1 iops : min= 7, max= 7, avg= 7.00, stdev= 0.00, samples=1 write: IOPS=1, BW=1814KiB/s (1857kB/s)(7168KiB/3952msec); 0 zone resets clat (msec): min=219, max=1208, avg=518.39, stdev=352.90 lat (msec): min=219, max=1208, avg=518.50, stdev=352.91 clat percentiles (msec): | 1.00th=[ 220], 5.00th=[ 220], 10.00th=[ 220], 20.00th=[ 253], | 30.00th=[ 266], 40.00th=[ 266], 50.00th=[ 401], 60.00th=[ 592], | 70.00th=[ 592], 80.00th=[ 684], 90.00th=[ 1217], 95.00th=[ 1217], | 99.00th=[ 1217], 99.50th=[ 1217], 99.90th=[ 1217], 99.95th=[ 1217], | 99.99th=[ 1217] bw ( KiB/s): min= 1735, max= 2039, per=59.96%, avg=1917.60, stdev=127.82, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 lat (usec) : 750=16.67% lat (msec) : 2=16.67%, 250=8.33%, 500=33.33%, 750=16.67%, 2000=8.33% cpu : usr=0.00%, sys=10.73%, ctx=137, 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=2285KiB/s (2340kB/s), 228KiB/s-1296KiB/s (234kB/s-1327kB/s), io=20.0MiB (20.0MB), run=3952-8964msec WRITE: bw=3199KiB/s (3275kB/s), 612KiB/s-1814KiB/s (627kB/s-1857kB/s), io=28.0MiB (29.4MB), run=3952-8964msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145554: Thu Aug 27 18:37:30 2026 read: IOPS=0, BW=864KiB/s (885kB/s)(7168KiB/8293msec) clat (msec): min=130, max=455, avg=238.96, stdev=117.69 lat (msec): min=130, max=455, avg=238.96, stdev=117.69 clat percentiles (msec): | 1.00th=[ 131], 5.00th=[ 131], 10.00th=[ 131], 20.00th=[ 140], | 30.00th=[ 197], 40.00th=[ 197], 50.00th=[ 203], 60.00th=[ 209], | 70.00th=[ 209], 80.00th=[ 342], 90.00th=[ 456], 95.00th=[ 456], | 99.00th=[ 456], 99.50th=[ 456], 99.90th=[ 456], 99.95th=[ 456], | 99.99th=[ 456] bw ( KiB/s): min= 1750, max= 4096, per=100.00%, avg=2811.25, stdev=1140.82, samples=4 iops : min= 1, max= 4, avg= 2.25, stdev= 1.50, samples=4 write: IOPS=0, BW=617KiB/s (632kB/s)(5120KiB/8293msec); 0 zone resets clat (msec): min=402, max=4689, avg=1299.41, stdev=1895.90 lat (msec): min=402, max=4689, avg=1299.52, stdev=1895.93 clat percentiles (msec): | 1.00th=[ 401], 5.00th=[ 401], 10.00th=[ 401], 20.00th=[ 401], | 30.00th=[ 414], 40.00th=[ 414], 50.00th=[ 443], 60.00th=[ 443], | 70.00th=[ 550], 80.00th=[ 550], 90.00th=[ 4665], 95.00th=[ 4665], | 99.00th=[ 4665], 99.50th=[ 4665], 99.90th=[ 4665], 99.95th=[ 4665], | 99.99th=[ 4665] bw ( KiB/s): min= 2015, max= 2048, per=70.49%, avg=2028.80, stdev=14.08, samples=5 iops : min= 1, max= 2, avg= 1.20, stdev= 0.45, samples=5 lat (msec) : 250=41.67%, 500=41.67%, 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=2.51%, ctx=79, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=145555: Thu Aug 27 18:37:30 2026 read: IOPS=0, BW=234KiB/s (239kB/s)(2048KiB/8759msec) clat (msec): min=133, max=152, avg=143.19, stdev=13.85 lat (msec): min=133, max=152, avg=143.19, stdev=13.85 clat percentiles (msec): | 1.00th=[ 134], 5.00th=[ 134], 10.00th=[ 134], 20.00th=[ 134], | 30.00th=[ 134], 40.00th=[ 134], 50.00th=[ 134], 60.00th=[ 153], | 70.00th=[ 153], 80.00th=[ 153], 90.00th=[ 153], 95.00th=[ 153], | 99.00th=[ 153], 99.50th=[ 153], 99.90th=[ 153], 99.95th=[ 153], | 99.99th=[ 153] bw ( KiB/s): min= 1622, max= 1750, per=82.00%, avg=1686.00, stdev=90.51, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1169KiB/s (1197kB/s)(10.0MiB/8759msec); 0 zone resets clat (msec): min=252, max=3315, avg=841.88, stdev=922.99 lat (msec): min=252, max=3315, avg=842.04, stdev=922.95 clat percentiles (msec): | 1.00th=[ 253], 5.00th=[ 253], 10.00th=[ 253], 20.00th=[ 393], | 30.00th=[ 447], 40.00th=[ 481], 50.00th=[ 489], 60.00th=[ 514], | 70.00th=[ 550], 80.00th=[ 567], 90.00th=[ 1401], 95.00th=[ 3306], | 99.00th=[ 3306], 99.50th=[ 3306], 99.90th=[ 3306], 99.95th=[ 3306], | 99.99th=[ 3306] bw ( KiB/s): min= 1750, max= 4096, per=78.98%, avg=2273.00, stdev=810.28, samples=7 iops : min= 1, max= 4, avg= 1.43, stdev= 1.13, samples=7 lat (msec) : 250=16.67%, 500=41.67%, 750=25.00%, 2000=8.33%, >=2000=8.33% cpu : usr=0.05%, sys=2.77%, ctx=106, 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=145556: Thu Aug 27 18:37:30 2026 read: IOPS=0, BW=636KiB/s (652kB/s)(6144KiB/9655msec) clat (msec): min=120, max=4949, avg=1118.20, stdev=1905.44 lat (msec): min=120, max=4949, avg=1118.21, stdev=1905.44 clat percentiles (msec): | 1.00th=[ 121], 5.00th=[ 121], 10.00th=[ 121], 20.00th=[ 186], | 30.00th=[ 186], 40.00th=[ 203], 50.00th=[ 203], 60.00th=[ 247], | 70.00th=[ 1003], 80.00th=[ 1003], 90.00th=[ 4933], 95.00th=[ 4933], | 99.00th=[ 4933], 99.50th=[ 4933], 99.90th=[ 4933], 99.95th=[ 4933], | 99.99th=[ 4933] bw ( KiB/s): min= 2011, max= 2039, per=98.55%, avg=2026.20, stdev=12.46, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 write: IOPS=0, BW=636KiB/s (652kB/s)(6144KiB/9655msec); 0 zone resets clat (msec): min=248, max=1246, avg=482.38, stdev=382.12 lat (msec): min=248, max=1246, avg=482.52, stdev=382.11 clat percentiles (msec): | 1.00th=[ 249], 5.00th=[ 249], 10.00th=[ 249], 20.00th=[ 284], | 30.00th=[ 284], 40.00th=[ 300], 50.00th=[ 300], 60.00th=[ 347], | 70.00th=[ 468], 80.00th=[ 468], 90.00th=[ 1250], 95.00th=[ 1250], | 99.00th=[ 1250], 99.50th=[ 1250], 99.90th=[ 1250], 99.95th=[ 1250], | 99.99th=[ 1250] bw ( KiB/s): min= 1532, max= 2031, per=66.48%, avg=1913.20, stdev=215.26, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 lat (msec) : 250=41.67%, 500=33.33%, 2000=16.67%, >=2000=8.33% cpu : usr=0.00%, sys=1.80%, ctx=67, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=6,6,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145557: Thu Aug 27 18:37:30 2026 read: IOPS=0, BW=514KiB/s (526kB/s)(5120KiB/9960msec) clat (msec): min=77, max=4935, avg=1146.88, stdev=2120.06 lat (msec): min=77, max=4935, avg=1146.88, stdev=2120.06 clat percentiles (msec): | 1.00th=[ 78], 5.00th=[ 78], 10.00th=[ 78], 20.00th=[ 78], | 30.00th=[ 130], 40.00th=[ 130], 50.00th=[ 284], 60.00th=[ 284], | 70.00th=[ 309], 80.00th=[ 309], 90.00th=[ 4933], 95.00th=[ 4933], | 99.00th=[ 4933], 99.50th=[ 4933], 99.90th=[ 4933], 99.95th=[ 4933], | 99.99th=[ 4933] bw ( KiB/s): min= 2039, max= 6095, per=100.00%, avg=4067.00, stdev=2868.03, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 write: IOPS=0, BW=720KiB/s (737kB/s)(7168KiB/9960msec); 0 zone resets clat (msec): min=153, max=1438, avg=579.36, stdev=446.14 lat (msec): min=153, max=1438, avg=579.46, stdev=446.17 clat percentiles (msec): | 1.00th=[ 155], 5.00th=[ 155], 10.00th=[ 155], 20.00th=[ 211], | 30.00th=[ 296], 40.00th=[ 296], 50.00th=[ 567], 60.00th=[ 567], | 70.00th=[ 567], 80.00th=[ 827], 90.00th=[ 1435], 95.00th=[ 1435], | 99.00th=[ 1435], 99.50th=[ 1435], 99.90th=[ 1435], 99.95th=[ 1435], | 99.99th=[ 1435] bw ( KiB/s): min= 1750, max= 4063, per=82.25%, avg=2367.20, stdev=955.03, samples=5 iops : min= 1, max= 3, avg= 1.40, stdev= 0.89, samples=5 lat (msec) : 100=8.33%, 250=25.00%, 500=25.00%, 750=16.67%, 1000=8.33% lat (msec) : 2000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=1.95%, ctx=78, 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=2056KiB/s (2106kB/s), 234KiB/s-864KiB/s (239kB/s-885kB/s), io=20.0MiB (20.0MB), run=8293-9960msec WRITE: bw=2879KiB/s (2948kB/s), 617KiB/s-1169KiB/s (632kB/s-1197kB/s), io=28.0MiB (29.4MB), run=8293-9960msec 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=145570: Thu Aug 27 18:37:45 2026 read: IOPS=1, BW=6074KiB/s (6220kB/s)(12.0MiB/2023msec) clat (msec): min=541, max=812, avg=660.21, stdev=138.56 lat (msec): min=541, max=812, avg=660.21, stdev=138.56 clat percentiles (msec): | 1.00th=[ 542], 5.00th=[ 542], 10.00th=[ 542], 20.00th=[ 542], | 30.00th=[ 542], 40.00th=[ 625], 50.00th=[ 625], 60.00th=[ 625], | 70.00th=[ 810], 80.00th=[ 810], 90.00th=[ 810], 95.00th=[ 810], | 99.00th=[ 810], 99.50th=[ 810], 99.90th=[ 810], 99.95th=[ 810], | 99.99th=[ 810] bw ( KiB/s): min= 8015, max= 8159, per=100.00%, avg=8087.00, stdev=101.82, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=66.67%, 1000=33.33% cpu : usr=0.05%, sys=14.69%, ctx=295, majf=0, minf=9 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=3,0,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145571: Thu Aug 27 18:37:45 2026 read: IOPS=0, BW=1866KiB/s (1911kB/s)(4096KiB/2195msec) clat (nsec): min=437886k, max=437886k, avg=437886398.00, stdev= 0.00 lat (nsec): min=437889k, max=437889k, avg=437888924.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 439], 5.00th=[ 439], 10.00th=[ 439], 20.00th=[ 439], | 30.00th=[ 439], 40.00th=[ 439], 50.00th=[ 439], 60.00th=[ 439], | 70.00th=[ 439], 80.00th=[ 439], 90.00th=[ 439], 95.00th=[ 439], | 99.00th=[ 439], 99.50th=[ 439], 99.90th=[ 439], 99.95th=[ 439], | 99.99th=[ 439] bw ( KiB/s): min= 5649, max= 5649, per=75.68%, avg=5649.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=3732KiB/s (3822kB/s)(8192KiB/2195msec); 0 zone resets clat (msec): min=651, max=1009, avg=830.56, stdev=253.37 lat (msec): min=652, max=1010, avg=831.06, stdev=253.23 clat percentiles (msec): | 1.00th=[ 651], 5.00th=[ 651], 10.00th=[ 651], 20.00th=[ 651], | 30.00th=[ 651], 40.00th=[ 651], 50.00th=[ 651], 60.00th=[ 1011], | 70.00th=[ 1011], 80.00th=[ 1011], 90.00th=[ 1011], 95.00th=[ 1011], | 99.00th=[ 1011], 99.50th=[ 1011], 99.90th=[ 1011], 99.95th=[ 1011], | 99.99th=[ 1011] bw ( KiB/s): min= 8062, max= 8062, per=65.20%, avg=8062.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 750=33.33%, 2000=33.33% cpu : usr=0.09%, sys=5.61%, ctx=128, 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=145573: Thu Aug 27 18:37:45 2026 write: IOPS=1, BW=4637KiB/s (4748kB/s)(12.0MiB/2650msec); 0 zone resets clat (msec): min=293, max=1244, avg=852.49, stdev=497.03 lat (msec): min=293, max=1245, avg=853.37, stdev=497.30 clat percentiles (msec): | 1.00th=[ 292], 5.00th=[ 292], 10.00th=[ 292], 20.00th=[ 292], | 30.00th=[ 292], 40.00th=[ 1020], 50.00th=[ 1020], 60.00th=[ 1020], | 70.00th=[ 1250], 80.00th=[ 1250], 90.00th=[ 1250], 95.00th=[ 1250], | 99.00th=[ 1250], 99.50th=[ 1250], 99.90th=[ 1250], 99.95th=[ 1250], | 99.99th=[ 1250] bw ( KiB/s): min= 8094, max= 8094, per=65.46%, avg=8094.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 2000=66.67% cpu : usr=0.08%, sys=4.15%, ctx=42, 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=145574: Thu Aug 27 18:37:45 2026 write: IOPS=1, BW=5444KiB/s (5575kB/s)(12.0MiB/2257msec); 0 zone resets clat (msec): min=331, max=1162, avg=723.53, stdev=417.56 lat (msec): min=332, max=1163, avg=724.01, stdev=417.64 clat percentiles (msec): | 1.00th=[ 334], 5.00th=[ 334], 10.00th=[ 334], 20.00th=[ 334], | 30.00th=[ 334], 40.00th=[ 676], 50.00th=[ 676], 60.00th=[ 676], | 70.00th=[ 1167], 80.00th=[ 1167], 90.00th=[ 1167], 95.00th=[ 1167], | 99.00th=[ 1167], 99.50th=[ 1167], 99.90th=[ 1167], 99.95th=[ 1167], | 99.99th=[ 1167] bw ( KiB/s): min= 8015, max= 8062, per=65.01%, avg=8038.50, stdev=33.23, 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=0.09%, sys=4.26%, ctx=50, 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=7464KiB/s (7643kB/s), 1866KiB/s-6074KiB/s (1911kB/s-6220kB/s), io=16.0MiB (16.8MB), run=2023-2195msec WRITE: bw=12.1MiB/s (12.7MB/s), 3732KiB/s-5444KiB/s (3822kB/s-5575kB/s), io=32.0MiB (33.6MB), run=2195-2650msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145567: Thu Aug 27 18:37:45 2026 read: IOPS=1, BW=7923KiB/s (8113kB/s)(12.0MiB/1551msec) clat (msec): min=308, max=766, avg=468.33, stdev=258.68 lat (msec): min=308, max=766, avg=468.33, stdev=258.68 clat percentiles (msec): | 1.00th=[ 309], 5.00th=[ 309], 10.00th=[ 309], 20.00th=[ 309], | 30.00th=[ 309], 40.00th=[ 330], 50.00th=[ 330], 60.00th=[ 330], | 70.00th=[ 768], 80.00th=[ 768], 90.00th=[ 768], 95.00th=[ 768], | 99.00th=[ 768], 99.50th=[ 768], 99.90th=[ 768], 99.95th=[ 768], | 99.99th=[ 768] bw ( KiB/s): min= 7353, max= 8159, per=100.00%, avg=7756.00, stdev=569.93, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=66.67%, 1000=33.33% cpu : usr=0.06%, sys=8.84%, ctx=91, 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=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=145568: Thu Aug 27 18:37:45 2026 read: IOPS=0, BW=1376KiB/s (1409kB/s)(4096KiB/2977msec) clat (nsec): min=945139k, max=945139k, avg=945139359.00, stdev= 0.00 lat (nsec): min=945142k, max=945142k, avg=945142166.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 944], 5.00th=[ 944], 10.00th=[ 944], 20.00th=[ 944], | 30.00th=[ 944], 40.00th=[ 944], 50.00th=[ 944], 60.00th=[ 944], | 70.00th=[ 944], 80.00th=[ 944], 90.00th=[ 944], 95.00th=[ 944], | 99.00th=[ 944], 99.50th=[ 944], 99.90th=[ 944], 99.95th=[ 944], | 99.99th=[ 944] bw ( KiB/s): min= 8062, max= 8062, per=100.00%, avg=8062.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2752KiB/s (2818kB/s)(8192KiB/2977msec); 0 zone resets clat (msec): min=802, max=1182, avg=992.61, stdev=268.90 lat (msec): min=802, max=1183, avg=993.03, stdev=268.82 clat percentiles (msec): | 1.00th=[ 802], 5.00th=[ 802], 10.00th=[ 802], 20.00th=[ 802], | 30.00th=[ 802], 40.00th=[ 802], 50.00th=[ 802], 60.00th=[ 1183], | 70.00th=[ 1183], 80.00th=[ 1183], 90.00th=[ 1183], 95.00th=[ 1183], | 99.00th=[ 1183], 99.50th=[ 1183], 99.90th=[ 1183], 99.95th=[ 1183], | 99.99th=[ 1183] bw ( KiB/s): min= 8192, max= 8192, per=75.93%, avg=8192.00, stdev= 0.00, samples=1 iops : min= 2, max= 2, avg= 2.00, stdev= 0.00, samples=1 lat (msec) : 1000=66.67%, 2000=33.33% cpu : usr=0.00%, sys=4.40%, ctx=58, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1,2,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145569: Thu Aug 27 18:37:45 2026 write: IOPS=0, BW=4046KiB/s (4143kB/s)(12.0MiB/3037msec); 0 zone resets clat (msec): min=324, max=1474, avg=991.68, stdev=596.79 lat (msec): min=324, max=1475, avg=992.15, stdev=596.92 clat percentiles (msec): | 1.00th=[ 326], 5.00th=[ 326], 10.00th=[ 326], 20.00th=[ 326], | 30.00th=[ 326], 40.00th=[ 1183], 50.00th=[ 1183], 60.00th=[ 1183], | 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= 8126, max= 8126, per=75.32%, avg=8126.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 2000=66.67% cpu : usr=0.00%, sys=3.85%, ctx=49, 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=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=145572: Thu Aug 27 18:37:45 2026 write: IOPS=1, BW=6407KiB/s (6560kB/s)(12.0MiB/1918msec); 0 zone resets clat (msec): min=309, max=1181, avg=618.46, stdev=488.06 lat (msec): min=313, max=1181, avg=620.10, stdev=486.95 clat percentiles (msec): | 1.00th=[ 309], 5.00th=[ 309], 10.00th=[ 309], 20.00th=[ 309], | 30.00th=[ 309], 40.00th=[ 363], 50.00th=[ 363], 60.00th=[ 363], | 70.00th=[ 1183], 80.00th=[ 1183], 90.00th=[ 1183], 95.00th=[ 1183], | 99.00th=[ 1183], 99.50th=[ 1183], 99.90th=[ 1183], 99.95th=[ 1183], | 99.99th=[ 1183] bw ( KiB/s): min= 5595, max= 8126, per=63.59%, avg=6860.50, stdev=1789.69, 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=6.47%, ctx=96, 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=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=5504KiB/s (5636kB/s), 1376KiB/s-7923KiB/s (1409kB/s-8113kB/s), io=16.0MiB (16.8MB), run=1551-2977msec WRITE: bw=10.5MiB/s (11.0MB/s), 2752KiB/s-6407KiB/s (2818kB/s-6560kB/s), io=32.0MiB (33.6MB), run=1918-3037msec