== sanity test 398b: DIO and buffer IO race ============== 19:14:12 (1785885252) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 8.4016 s, 6.0 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=179246: Tue Aug 4 19:17:34 2026 read: IOPS=8, BW=34.6KiB/s (35.4kB/s)(5992KiB/173112msec) clat (usec): min=42, max=502447, avg=63950.48, stdev=44154.01 lat (usec): min=43, max=502448, avg=63954.28, stdev=44155.59 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 15926], 10.00th=[ 22676], 20.00th=[ 31851], | 30.00th=[ 39060], 40.00th=[ 46400], 50.00th=[ 53740], 60.00th=[ 62129], | 70.00th=[ 74974], 80.00th=[ 90702], 90.00th=[117965], 95.00th=[147850], | 99.00th=[208667], 99.50th=[242222], 99.90th=[396362], 99.95th=[501220], | 99.99th=[501220] bw ( KiB/s): min= 7, max= 110, per=25.66%, avg=34.39, stdev=16.08, samples=336 iops : min= 1, max= 27, avg= 7.92, stdev= 4.05, samples=336 write: IOPS=9, BW=36.4KiB/s (37.2kB/s)(6296KiB/173112msec); 0 zone resets clat (usec): min=887, max=1343.3k, avg=48802.81, stdev=61474.20 lat (usec): min=889, max=1343.3k, avg=48810.45, stdev=61474.91 clat percentiles (usec): | 1.00th=[ 1123], 5.00th=[ 1237], 10.00th=[ 1434], | 20.00th=[ 4621], 30.00th=[ 9110], 40.00th=[ 19530], | 50.00th=[ 30802], 60.00th=[ 46400], 70.00th=[ 60556], | 80.00th=[ 85459], 90.00th=[ 121111], 95.00th=[ 152044], | 99.00th=[ 227541], 99.50th=[ 270533], 99.90th=[ 392168], | 99.95th=[1350566], 99.99th=[1350566] bw ( KiB/s): min= 6, max= 95, per=26.06%, avg=36.74, stdev=19.15, samples=331 iops : min= 1, max= 23, avg= 8.51, stdev= 4.82, samples=331 lat (usec) : 50=0.29%, 100=1.24%, 750=0.03%, 1000=0.07% lat (msec) : 2=6.45%, 4=2.73%, 10=6.87%, 20=6.71%, 50=29.88% lat (msec) : 100=30.70%, 250=14.55%, 500=0.42%, 750=0.03%, 2000=0.03% cpu : usr=0.05%, sys=3.93%, ctx=6149, 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=179247: Tue Aug 4 19:17:34 2026 read: IOPS=8, BW=33.0KiB/s (34.8kB/s)(5940KiB/174873msec) clat (usec): min=32, max=1187.2k, avg=65978.32, stdev=56586.93 lat (usec): min=32, max=1187.2k, avg=65990.28, stdev=56602.91 clat percentiles (usec): | 1.00th=[ 51], 5.00th=[ 14222], 10.00th=[ 21890], | 20.00th=[ 30540], 30.00th=[ 38536], 40.00th=[ 45876], | 50.00th=[ 54264], 60.00th=[ 63177], 70.00th=[ 74974], | 80.00th=[ 92799], 90.00th=[ 125305], 95.00th=[ 152044], | 99.00th=[ 240124], 99.50th=[ 274727], 99.90th=[ 608175], | 99.95th=[1182794], 99.99th=[1182794] bw ( KiB/s): min= 5, max= 96, per=25.42%, avg=34.07, stdev=16.96, samples=336 iops : min= 1, max= 24, avg= 7.84, stdev= 4.29, samples=336 write: IOPS=9, BW=36.3KiB/s (37.2kB/s)(6348KiB/174873msec); 0 zone resets clat (usec): min=959, max=388156, avg=48109.13, stdev=54050.61 lat (usec): min=959, max=388158, avg=48110.59, stdev=54050.58 clat percentiles (usec): | 1.00th=[ 1139], 5.00th=[ 1254], 10.00th=[ 1549], 20.00th=[ 5014], | 30.00th=[ 9634], 40.00th=[ 20579], 50.00th=[ 31589], 60.00th=[ 44303], | 70.00th=[ 60556], 80.00th=[ 82314], 90.00th=[115868], 95.00th=[152044], | 99.00th=[256902], 99.50th=[295699], 99.90th=[379585], 99.95th=[387974], | 99.99th=[387974] bw ( KiB/s): min= 7, max= 107, per=25.81%, avg=36.39, stdev=19.46, samples=335 iops : min= 1, max= 26, avg= 8.43, stdev= 4.91, samples=335 lat (usec) : 50=0.33%, 100=1.24%, 250=0.03%, 1000=0.10% lat (msec) : 2=5.83%, 4=3.32%, 10=6.80%, 20=6.93%, 50=30.57% lat (msec) : 100=29.33%, 250=14.62%, 500=0.85%, 750=0.03%, 2000=0.03% cpu : usr=0.06%, sys=3.93%, ctx=6319, 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=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=179248: Tue Aug 4 19:17:34 2026 read: IOPS=8, BW=33.8KiB/s (34.7kB/s)(6028KiB/178092msec) clat (usec): min=34, max=391546, avg=65252.19, stdev=46848.73 lat (usec): min=35, max=391547, avg=65253.43, stdev=46848.71 clat percentiles (usec): | 1.00th=[ 50], 5.00th=[ 13698], 10.00th=[ 21890], 20.00th=[ 30278], | 30.00th=[ 38536], 40.00th=[ 46924], 50.00th=[ 54789], 60.00th=[ 65274], | 70.00th=[ 76022], 80.00th=[ 94897], 90.00th=[120062], 95.00th=[154141], | 99.00th=[227541], 99.50th=[299893], 99.90th=[375391], 99.95th=[392168], | 99.99th=[392168] bw ( KiB/s): min= 7, max= 79, per=25.50%, avg=34.17, stdev=15.98, samples=341 iops : min= 1, max= 19, avg= 7.87, stdev= 4.02, samples=341 write: IOPS=8, BW=35.1KiB/s (35.0kB/s)(6260KiB/178092msec); 0 zone resets clat (usec): min=975, max=1177.6k, avg=50601.45, stdev=61657.47 lat (usec): min=976, max=1177.6k, avg=50604.43, stdev=61656.42 clat percentiles (usec): | 1.00th=[ 1123], 5.00th=[ 1237], 10.00th=[ 1336], | 20.00th=[ 4883], 30.00th=[ 11207], 40.00th=[ 21627], | 50.00th=[ 33424], 60.00th=[ 47449], 70.00th=[ 64750], | 80.00th=[ 88605], 90.00th=[ 121111], 95.00th=[ 145753], | 99.00th=[ 229639], 99.50th=[ 278922], 99.90th=[ 683672], | 99.95th=[1182794], 99.99th=[1182794] bw ( KiB/s): min= 5, max= 95, per=24.84%, avg=35.02, stdev=17.53, samples=345 iops : min= 1, max= 23, avg= 8.09, stdev= 4.43, samples=345 lat (usec) : 50=0.49%, 100=1.30%, 250=0.07%, 1000=0.03% lat (msec) : 2=6.87%, 4=2.15%, 10=5.76%, 20=7.16%, 50=29.49% lat (msec) : 100=30.40%, 250=15.46%, 500=0.75%, 750=0.03%, 2000=0.03% cpu : usr=0.05%, sys=3.67%, ctx=6188, 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=179249: Tue Aug 4 19:17:34 2026 read: IOPS=8, BW=34.3KiB/s (35.1kB/s)(6052KiB/176522msec) clat (usec): min=37, max=1328.2k, avg=65653.98, stdev=57561.05 lat (usec): min=37, max=1328.2k, avg=65662.86, stdev=57560.01 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 10814], 10.00th=[ 21365], | 20.00th=[ 30016], 30.00th=[ 38011], 40.00th=[ 45876], | 50.00th=[ 54789], 60.00th=[ 64750], 70.00th=[ 77071], | 80.00th=[ 92799], 90.00th=[ 120062], 95.00th=[ 149947], | 99.00th=[ 235930], 99.50th=[ 263193], 99.90th=[ 658506], | 99.95th=[1333789], 99.99th=[1333789] bw ( KiB/s): min= 7, max= 79, per=25.92%, avg=34.73, stdev=15.74, samples=336 iops : min= 1, max= 19, avg= 8.01, stdev= 3.97, samples=336 write: IOPS=8, BW=35.3KiB/s (36.2kB/s)(6236KiB/176522msec); 0 zone resets clat (usec): min=974, max=313715, avg=49137.00, stdev=52140.64 lat (usec): min=975, max=313716, avg=49141.63, stdev=52141.68 clat percentiles (usec): | 1.00th=[ 1106], 5.00th=[ 1237], 10.00th=[ 1369], 20.00th=[ 5014], | 30.00th=[ 11076], 40.00th=[ 21890], 50.00th=[ 33162], 60.00th=[ 46400], | 70.00th=[ 60556], 80.00th=[ 84411], 90.00th=[119014], 95.00th=[154141], | 99.00th=[225444], 99.50th=[261096], 99.90th=[295699], 99.95th=[312476], | 99.99th=[312476] bw ( KiB/s): min= 5, max= 103, per=25.35%, avg=35.74, stdev=18.71, samples=336 iops : min= 1, max= 25, avg= 8.27, stdev= 4.74, samples=336 lat (usec) : 50=0.49%, 100=1.30%, 250=0.13%, 500=0.03%, 1000=0.03% lat (msec) : 2=6.35%, 4=2.77%, 10=5.60%, 20=7.29%, 50=29.62% lat (msec) : 100=30.11%, 250=15.59%, 500=0.62%, 750=0.03%, 2000=0.03% cpu : usr=0.06%, sys=3.84%, ctx=6230, 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=135KiB/s (138kB/s), 33.8KiB/s-34.6KiB/s (34.7kB/s-35.4kB/s), io=23.4MiB (24.6MB), run=173112-178092msec WRITE: bw=141KiB/s (145kB/s), 35.1KiB/s-36.4KiB/s (35.0kB/s-37.2kB/s), io=24.6MiB (25.7MB), run=173112-178092msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179251: Tue Aug 4 19:18:27 2026 read: IOPS=6, BW=26.1KiB/s (26.7kB/s)(5992KiB/229787msec) clat (msec): min=5, max=1435, avg=60.46, stdev=68.70 lat (msec): min=5, max=1435, avg=60.46, stdev=68.70 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 13], 10.00th=[ 16], 20.00th=[ 22], | 30.00th=[ 27], 40.00th=[ 33], 50.00th=[ 40], 60.00th=[ 49], | 70.00th=[ 62], 80.00th=[ 84], 90.00th=[ 131], 95.00th=[ 184], | 99.00th=[ 292], 99.50th=[ 359], 99.90th=[ 600], 99.95th=[ 1435], | 99.99th=[ 1435] bw ( KiB/s): min= 7, max= 118, per=26.79%, avg=27.59, stdev=20.36, samples=417 iops : min= 1, max= 29, avg= 6.22, stdev= 5.16, samples=417 write: IOPS=6, BW=27.4KiB/s (28.1kB/s)(6296KiB/229787msec); 0 zone resets clat (msec): min=11, max=708, avg=88.37, stdev=68.57 lat (msec): min=11, max=708, avg=88.37, stdev=68.57 clat percentiles (msec): | 1.00th=[ 18], 5.00th=[ 26], 10.00th=[ 31], 20.00th=[ 39], | 30.00th=[ 46], 40.00th=[ 54], 50.00th=[ 66], 60.00th=[ 80], | 70.00th=[ 100], 80.00th=[ 131], 90.00th=[ 182], 95.00th=[ 226], | 99.00th=[ 326], 99.50th=[ 376], 99.90th=[ 468], 99.95th=[ 709], | 99.99th=[ 709] bw ( KiB/s): min= 5, max= 119, per=26.00%, avg=28.08, stdev=18.63, samples=431 iops : min= 1, max= 29, avg= 6.34, stdev= 4.70, samples=431 lat (msec) : 10=0.62%, 20=9.11%, 50=38.35%, 100=29.07%, 250=20.18% lat (msec) : 500=2.57%, 750=0.07%, 2000=0.03% cpu : usr=0.04%, sys=1.43%, ctx=4637, 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=179252: Tue Aug 4 19:18:27 2026 read: IOPS=6, BW=25.7KiB/s (26.3kB/s)(5940KiB/231039msec) clat (msec): min=5, max=1177, avg=62.09, stdev=70.45 lat (msec): min=5, max=1177, avg=62.09, stdev=70.45 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 16], 20.00th=[ 21], | 30.00th=[ 27], 40.00th=[ 33], 50.00th=[ 41], 60.00th=[ 51], | 70.00th=[ 65], 80.00th=[ 90], 90.00th=[ 136], 95.00th=[ 180], | 99.00th=[ 326], 99.50th=[ 397], 99.90th=[ 877], 99.95th=[ 1183], | 99.99th=[ 1183] bw ( KiB/s): min= 7, max= 143, per=26.82%, avg=27.62, stdev=20.51, samples=414 iops : min= 1, max= 35, avg= 6.22, stdev= 5.17, samples=414 write: IOPS=6, BW=27.5KiB/s (28.1kB/s)(6348KiB/231039msec); 0 zone resets clat (msec): min=10, max=703, avg=87.37, stdev=67.26 lat (msec): min=10, max=703, avg=87.37, stdev=67.26 clat percentiles (msec): | 1.00th=[ 18], 5.00th=[ 24], 10.00th=[ 29], 20.00th=[ 38], | 30.00th=[ 46], 40.00th=[ 54], 50.00th=[ 64], 60.00th=[ 80], | 70.00th=[ 103], 80.00th=[ 131], 90.00th=[ 178], 95.00th=[ 213], | 99.00th=[ 317], 99.50th=[ 384], 99.90th=[ 464], 99.95th=[ 701], | 99.99th=[ 701] bw ( KiB/s): min= 5, max= 111, per=25.76%, avg=27.82, stdev=19.61, samples=439 iops : min= 1, max= 27, avg= 6.27, stdev= 4.96, samples=439 lat (msec) : 10=1.37%, 20=9.34%, 50=36.78%, 100=28.13%, 250=21.61% lat (msec) : 500=2.64%, 750=0.07%, 1000=0.03%, 2000=0.03% cpu : usr=0.04%, sys=1.41%, ctx=4726, 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=179253: Tue Aug 4 19:18:27 2026 read: IOPS=6, BW=26.3KiB/s (26.9kB/s)(6028KiB/229570msec) clat (msec): min=4, max=824, avg=61.68, stdev=65.55 lat (msec): min=4, max=824, avg=61.68, stdev=65.55 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 13], 10.00th=[ 16], 20.00th=[ 22], | 30.00th=[ 27], 40.00th=[ 32], 50.00th=[ 40], 60.00th=[ 49], | 70.00th=[ 61], 80.00th=[ 87], 90.00th=[ 142], 95.00th=[ 190], | 99.00th=[ 313], 99.50th=[ 359], 99.90th=[ 558], 99.95th=[ 827], | 99.99th=[ 827] bw ( KiB/s): min= 5, max= 109, per=26.57%, avg=27.37, stdev=20.17, samples=424 iops : min= 1, max= 27, avg= 6.16, stdev= 5.10, samples=424 write: IOPS=6, BW=27.3KiB/s (27.9kB/s)(6260KiB/229570msec); 0 zone resets clat (msec): min=11, max=1306, avg=87.23, stdev=72.10 lat (msec): min=11, max=1306, avg=87.23, stdev=72.10 clat percentiles (msec): | 1.00th=[ 18], 5.00th=[ 25], 10.00th=[ 29], 20.00th=[ 37], | 30.00th=[ 47], 40.00th=[ 54], 50.00th=[ 65], 60.00th=[ 81], | 70.00th=[ 100], 80.00th=[ 129], 90.00th=[ 178], 95.00th=[ 220], | 99.00th=[ 334], 99.50th=[ 380], 99.90th=[ 464], 99.95th=[ 1301], | 99.99th=[ 1301] bw ( KiB/s): min= 7, max= 111, per=25.94%, avg=28.02, stdev=19.36, samples=430 iops : min= 1, max= 27, avg= 6.32, stdev= 4.89, samples=430 lat (msec) : 10=1.11%, 20=8.79%, 50=38.35%, 100=28.26%, 250=20.96% lat (msec) : 500=2.41%, 750=0.07%, 1000=0.03%, 2000=0.03% cpu : usr=0.04%, sys=1.44%, ctx=4706, 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=179254: Tue Aug 4 19:18:27 2026 read: IOPS=6, BW=26.3KiB/s (26.0kB/s)(6052KiB/229782msec) clat (msec): min=6, max=610, avg=60.29, stdev=56.86 lat (msec): min=6, max=610, avg=60.29, stdev=56.86 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 14], 10.00th=[ 17], 20.00th=[ 23], | 30.00th=[ 28], 40.00th=[ 33], 50.00th=[ 40], 60.00th=[ 50], | 70.00th=[ 65], 80.00th=[ 89], 90.00th=[ 136], 95.00th=[ 176], | 99.00th=[ 268], 99.50th=[ 334], 99.90th=[ 510], 99.95th=[ 609], | 99.99th=[ 609] bw ( KiB/s): min= 7, max= 135, per=27.29%, avg=28.11, stdev=19.51, samples=414 iops : min= 1, max= 33, avg= 6.35, stdev= 4.93, samples=414 write: IOPS=6, BW=27.1KiB/s (27.8kB/s)(6236KiB/229782msec); 0 zone resets clat (msec): min=10, max=1254, avg=88.79, stdev=73.78 lat (msec): min=10, max=1254, avg=88.79, stdev=73.79 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 26], 10.00th=[ 30], 20.00th=[ 40], | 30.00th=[ 47], 40.00th=[ 55], 50.00th=[ 67], 60.00th=[ 80], | 70.00th=[ 99], 80.00th=[ 126], 90.00th=[ 182], 95.00th=[ 232], | 99.00th=[ 338], 99.50th=[ 409], 99.90th=[ 468], 99.95th=[ 1250], | 99.99th=[ 1250] bw ( KiB/s): min= 5, max= 101, per=25.40%, avg=27.43, stdev=18.64, samples=436 iops : min= 1, max= 25, avg= 6.18, stdev= 4.71, samples=436 lat (msec) : 10=0.65%, 20=7.94%, 50=38.31%, 100=29.88%, 250=20.64% lat (msec) : 500=2.47%, 750=0.07%, 2000=0.03% cpu : usr=0.03%, sys=1.45%, ctx=4575, 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=104KiB/s (106kB/s), 25.7KiB/s-26.3KiB/s (26.3kB/s-26.0kB/s), io=23.4MiB (24.6MB), run=229570-231039msec WRITE: bw=109KiB/s (111kB/s), 27.1KiB/s-27.5KiB/s (27.8kB/s-28.1kB/s), io=24.6MiB (25.7MB), run=229570-231039msec 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=179306: Tue Aug 4 19:19:26 2026 read: IOPS=9, BW=145KiB/s (149kB/s)(5920KiB/40806msec) clat (usec): min=27, max=167974, avg=57883.10, stdev=33548.49 lat (usec): min=28, max=167976, avg=57884.42, stdev=33548.50 clat percentiles (usec): | 1.00th=[ 45], 5.00th=[ 65], 10.00th=[ 19006], 20.00th=[ 31065], | 30.00th=[ 40109], 40.00th=[ 47973], 50.00th=[ 53740], 60.00th=[ 61604], | 70.00th=[ 70779], 80.00th=[ 85459], 90.00th=[101188], 95.00th=[117965], | 99.00th=[145753], 99.50th=[164627], 99.90th=[168821], 99.95th=[168821], | 99.99th=[168821] bw ( KiB/s): min= 30, max= 285, per=24.69%, avg=144.70, stdev=51.50, samples=80 iops : min= 1, max= 17, avg= 8.25, stdev= 3.28, samples=80 write: IOPS=9, BW=156KiB/s (160kB/s)(6368KiB/40806msec); 0 zone resets clat (usec): min=1581, max=270924, avg=48302.12, stdev=45036.39 lat (usec): min=1583, max=270926, avg=48304.41, stdev=45036.09 clat percentiles (usec): | 1.00th=[ 1663], 5.00th=[ 2507], 10.00th=[ 5407], 20.00th=[ 8356], | 30.00th=[ 14353], 40.00th=[ 23200], 50.00th=[ 38536], 60.00th=[ 49546], | 70.00th=[ 62653], 80.00th=[ 81265], 90.00th=[111674], 95.00th=[141558], | 99.00th=[191890], 99.50th=[204473], 99.90th=[270533], 99.95th=[270533], | 99.99th=[270533] bw ( KiB/s): min= 31, max= 351, per=25.23%, avg=155.65, stdev=71.48, samples=80 iops : min= 1, max= 21, avg= 8.95, stdev= 4.53, samples=80 lat (usec) : 50=0.65%, 100=3.26%, 500=0.13%, 750=0.13% lat (msec) : 2=1.82%, 4=2.47%, 10=7.94%, 20=8.33%, 50=27.60% lat (msec) : 100=36.07%, 250=11.46%, 500=0.13% cpu : usr=0.07%, sys=4.24%, ctx=1688, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179307: Tue Aug 4 19:19:26 2026 read: IOPS=8, BW=144KiB/s (147kB/s)(5744KiB/39955msec) clat (usec): min=37, max=302987, avg=61750.07, stdev=40272.51 lat (usec): min=38, max=302988, avg=61751.23, stdev=40272.52 clat percentiles (usec): | 1.00th=[ 51], 5.00th=[ 62], 10.00th=[ 19268], 20.00th=[ 33817], | 30.00th=[ 40109], 40.00th=[ 47449], 50.00th=[ 56361], 60.00th=[ 67634], | 70.00th=[ 76022], 80.00th=[ 87557], 90.00th=[106431], 95.00th=[129500], | 99.00th=[198181], 99.50th=[254804], 99.90th=[304088], 99.95th=[304088], | 99.99th=[304088] bw ( KiB/s): min= 31, max= 283, per=24.89%, avg=145.86, stdev=52.89, samples=77 iops : min= 1, max= 17, avg= 8.34, stdev= 3.32, samples=77 write: IOPS=10, BW=164KiB/s (168kB/s)(6544KiB/39955msec); 0 zone resets clat (usec): min=1406, max=247327, avg=43258.93, stdev=42008.73 lat (usec): min=1407, max=247327, avg=43260.80, stdev=42008.69 clat percentiles (usec): | 1.00th=[ 1565], 5.00th=[ 1844], 10.00th=[ 4621], 20.00th=[ 8291], | 30.00th=[ 15533], 40.00th=[ 22152], 50.00th=[ 31851], 60.00th=[ 42206], | 70.00th=[ 54264], 80.00th=[ 68682], 90.00th=[104334], 95.00th=[127402], | 99.00th=[187696], 99.50th=[214959], 99.90th=[246416], 99.95th=[246416], | 99.99th=[246416] bw ( KiB/s): min= 31, max= 384, per=26.42%, avg=162.99, stdev=72.55, samples=78 iops : min= 1, max= 24, avg= 9.42, stdev= 4.63, samples=78 lat (usec) : 50=0.39%, 100=2.99%, 250=0.13%, 500=0.13% lat (msec) : 2=3.26%, 4=1.82%, 10=7.29%, 20=7.94%, 50=31.51% lat (msec) : 100=33.46%, 250=10.81%, 500=0.26% cpu : usr=0.05%, sys=4.56%, ctx=1726, 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=179308: Tue Aug 4 19:19:26 2026 read: IOPS=9, BW=153KiB/s (157kB/s)(6256KiB/40785msec) clat (usec): min=40, max=226609, avg=59824.40, stdev=37277.75 lat (usec): min=40, max=226610, avg=59833.67, stdev=37278.69 clat percentiles (usec): | 1.00th=[ 48], 5.00th=[ 73], 10.00th=[ 20841], 20.00th=[ 32637], | 30.00th=[ 39060], 40.00th=[ 45876], 50.00th=[ 55313], 60.00th=[ 64750], | 70.00th=[ 73925], 80.00th=[ 86508], 90.00th=[101188], 95.00th=[127402], | 99.00th=[208667], 99.50th=[217056], 99.90th=[227541], 99.95th=[227541], | 99.99th=[227541] bw ( KiB/s): min= 31, max= 318, per=26.16%, avg=153.28, stdev=63.46, samples=80 iops : min= 1, max= 19, avg= 8.80, stdev= 4.02, samples=80 write: IOPS=9, BW=148KiB/s (151kB/s)(6032KiB/40785msec); 0 zone resets clat (usec): min=1500, max=234035, avg=45626.58, stdev=42854.21 lat (usec): min=1501, max=234037, avg=45628.54, stdev=42854.28 clat percentiles (usec): | 1.00th=[ 1762], 5.00th=[ 1958], 10.00th=[ 5080], 20.00th=[ 9241], | 30.00th=[ 15270], 40.00th=[ 27919], 50.00th=[ 34866], 60.00th=[ 43779], | 70.00th=[ 54789], 80.00th=[ 70779], 90.00th=[112722], 95.00th=[137364], | 99.00th=[198181], 99.50th=[227541], 99.90th=[233833], 99.95th=[233833], | 99.99th=[233833] bw ( KiB/s): min= 31, max= 347, per=24.30%, avg=149.95, stdev=60.11, samples=78 iops : min= 1, max= 21, avg= 8.58, stdev= 3.76, samples=78 lat (usec) : 50=0.52%, 100=2.73%, 250=0.26%, 500=0.13% lat (msec) : 2=2.60%, 4=1.95%, 10=6.64%, 20=6.90%, 50=33.98% lat (msec) : 100=32.94%, 250=11.33% cpu : usr=0.05%, sys=4.60%, ctx=1822, 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=179309: Tue Aug 4 19:19:26 2026 read: IOPS=9, BW=159KiB/s (162kB/s)(6032KiB/38032msec) clat (usec): min=33, max=237477, avg=53126.10, stdev=36231.25 lat (usec): min=33, max=237478, avg=53127.95, stdev=36231.85 clat percentiles (usec): | 1.00th=[ 49], 5.00th=[ 58], 10.00th=[ 68], 20.00th=[ 27657], | 30.00th=[ 36439], 40.00th=[ 43254], 50.00th=[ 50070], 60.00th=[ 56361], | 70.00th=[ 63701], 80.00th=[ 76022], 90.00th=[ 98042], 95.00th=[119014], | 99.00th=[170918], 99.50th=[214959], 99.90th=[238027], 99.95th=[238027], | 99.99th=[238027] bw ( KiB/s): min= 31, max= 318, per=26.65%, avg=156.15, stdev=66.78, samples=74 iops : min= 1, max= 19, avg= 8.99, stdev= 4.22, samples=74 write: IOPS=10, BW=164KiB/s (168kB/s)(6256KiB/38032msec); 0 zone resets clat (usec): min=1429, max=235313, avg=45622.44, stdev=44057.23 lat (usec): min=1431, max=235314, avg=45624.62, stdev=44057.19 clat percentiles (usec): | 1.00th=[ 1565], 5.00th=[ 1876], 10.00th=[ 4293], 20.00th=[ 7963], | 30.00th=[ 12387], 40.00th=[ 23462], 50.00th=[ 32113], 60.00th=[ 44303], | 70.00th=[ 57410], 80.00th=[ 77071], 90.00th=[109577], 95.00th=[139461], | 99.00th=[187696], 99.50th=[231736], 99.90th=[235930], 99.95th=[235930], | 99.99th=[235930] bw ( KiB/s): min= 31, max= 345, per=26.27%, avg=162.08, stdev=61.20, samples=74 iops : min= 1, max= 21, avg= 9.35, stdev= 3.87, samples=74 lat (usec) : 50=0.52%, 100=5.34%, 250=0.26%, 750=0.13% lat (msec) : 2=3.39%, 4=1.17%, 10=8.20%, 20=7.42%, 50=30.86% lat (msec) : 100=31.90%, 250=10.81% cpu : usr=0.06%, sys=4.54%, ctx=1671, 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=587KiB/s (601kB/s), 144KiB/s-159KiB/s (147kB/s-162kB/s), io=23.4MiB (24.5MB), run=38032-40806msec WRITE: bw=618KiB/s (632kB/s), 148KiB/s-164KiB/s (151kB/s-168kB/s), io=24.6MiB (25.8MB), run=38032-40806msec fio: pid=179311, err=5/file:backend.c:481, func=full resid, error=Input/output error rand-rw: (groupid=0, jobs=1): err= 5 (file:backend.c:481, func=full resid, error=Input/output error): pid=179311: Tue Aug 4 19:19:42 2026 read: IOPS=5, BW=85.3KiB/s (87.4kB/s)(3856KiB/45192msec) clat (msec): min=13, max=351, avg=77.34, stdev=57.02 lat (msec): min=13, max=351, avg=77.34, stdev=57.02 clat percentiles (msec): | 1.00th=[ 18], 5.00th=[ 23], 10.00th=[ 26], 20.00th=[ 34], | 30.00th=[ 42], 40.00th=[ 50], 50.00th=[ 56], 60.00th=[ 71], | 70.00th=[ 89], 80.00th=[ 120], 90.00th=[ 165], 95.00th=[ 184], | 99.00th=[ 300], 99.50th=[ 309], 99.90th=[ 351], 99.95th=[ 351], | 99.99th=[ 351] bw ( KiB/s): min= 31, max= 218, per=22.98%, avg=88.46, stdev=43.38, samples=85 iops : min= 1, max= 13, avg= 4.74, stdev= 2.76, samples=85 write: IOPS=5, BW=95.2KiB/s (97.5kB/s)(4304KiB/45192msec); 0 zone resets clat (msec): min=20, max=383, avg=98.37, stdev=55.14 lat (msec): min=20, max=383, avg=98.38, stdev=55.14 clat percentiles (msec): | 1.00th=[ 28], 5.00th=[ 39], 10.00th=[ 44], 20.00th=[ 55], | 30.00th=[ 65], 40.00th=[ 73], 50.00th=[ 87], 60.00th=[ 100], | 70.00th=[ 114], 80.00th=[ 136], 90.00th=[ 167], 95.00th=[ 199], | 99.00th=[ 338], 99.50th=[ 347], 99.90th=[ 384], 99.95th=[ 384], | 99.99th=[ 384] bw ( KiB/s): min= 31, max= 220, per=23.32%, avg=94.93, stdev=43.86, samples=89 iops : min= 1, max= 13, avg= 5.13, stdev= 2.79, samples=89 lat (msec) : 20=1.37%, 50=25.64%, 100=40.31%, 250=30.92%, 500=1.57% cpu : usr=0.03%, sys=1.21%, ctx=694, majf=0, minf=21 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=242,269,0,0 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=179312: Tue Aug 4 19:19:42 2026 read: IOPS=6, BW=101KiB/s (104kB/s)(5744KiB/56739msec) clat (msec): min=8, max=292, avg=63.76, stdev=50.12 lat (msec): min=8, max=292, avg=63.77, stdev=50.12 clat percentiles (msec): | 1.00th=[ 11], 5.00th=[ 18], 10.00th=[ 23], 20.00th=[ 29], | 30.00th=[ 34], 40.00th=[ 40], 50.00th=[ 47], 60.00th=[ 56], | 70.00th=[ 67], 80.00th=[ 91], 90.00th=[ 134], 95.00th=[ 180], | 99.00th=[ 259], 99.50th=[ 279], 99.90th=[ 292], 99.95th=[ 292], | 99.99th=[ 292] bw ( KiB/s): min= 25, max= 286, per=26.72%, avg=102.85, stdev=58.00, samples=110 iops : min= 1, max= 17, avg= 5.63, stdev= 3.68, samples=110 write: IOPS=7, BW=115KiB/s (118kB/s)(6544KiB/56739msec); 0 zone resets clat (msec): min=14, max=345, avg=82.65, stdev=49.72 lat (msec): min=14, max=345, avg=82.65, stdev=49.72 clat percentiles (msec): | 1.00th=[ 21], 5.00th=[ 32], 10.00th=[ 37], 20.00th=[ 43], | 30.00th=[ 52], 40.00th=[ 59], 50.00th=[ 68], 60.00th=[ 82], | 70.00th=[ 97], 80.00th=[ 118], 90.00th=[ 150], 95.00th=[ 180], | 99.00th=[ 230], 99.50th=[ 300], 99.90th=[ 347], 99.95th=[ 347], | 99.99th=[ 347] bw ( KiB/s): min= 31, max= 319, per=28.21%, avg=114.79, stdev=65.13, samples=112 iops : min= 1, max= 19, avg= 6.39, stdev= 4.15, samples=112 lat (msec) : 10=0.26%, 20=3.39%, 50=36.85%, 100=36.20%, 250=22.27% lat (msec) : 500=1.04% cpu : usr=0.04%, sys=1.50%, ctx=1266, 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=179313: Tue Aug 4 19:19:42 2026 read: IOPS=7, BW=112KiB/s (115kB/s)(6256KiB/55628msec) clat (msec): min=8, max=316, avg=59.71, stdev=46.22 lat (msec): min=8, max=316, avg=59.71, stdev=46.22 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 18], 10.00th=[ 22], 20.00th=[ 28], | 30.00th=[ 34], 40.00th=[ 40], 50.00th=[ 47], 60.00th=[ 54], | 70.00th=[ 63], 80.00th=[ 80], 90.00th=[ 120], 95.00th=[ 165], | 99.00th=[ 236], 99.50th=[ 296], 99.90th=[ 317], 99.95th=[ 317], | 99.99th=[ 317] bw ( KiB/s): min= 31, max= 384, per=29.80%, avg=114.74, stdev=68.55, samples=107 iops : min= 1, max= 24, avg= 6.39, stdev= 4.38, samples=107 write: IOPS=6, BW=108KiB/s (111kB/s)(6032KiB/55628msec); 0 zone resets clat (msec): min=17, max=355, avg=85.41, stdev=50.85 lat (msec): min=17, max=355, avg=85.42, stdev=50.85 clat percentiles (msec): | 1.00th=[ 25], 5.00th=[ 32], 10.00th=[ 36], 20.00th=[ 47], | 30.00th=[ 54], 40.00th=[ 61], 50.00th=[ 71], 60.00th=[ 85], | 70.00th=[ 99], 80.00th=[ 122], 90.00th=[ 150], 95.00th=[ 180], | 99.00th=[ 275], 99.50th=[ 305], 99.90th=[ 355], 99.95th=[ 355], | 99.99th=[ 355] bw ( KiB/s): min= 30, max= 255, per=27.02%, avg=109.97, stdev=48.74, samples=106 iops : min= 1, max= 15, avg= 6.08, stdev= 3.08, samples=106 lat (msec) : 10=0.52%, 20=3.52%, 50=35.94%, 100=38.80%, 250=20.31% lat (msec) : 500=0.91% cpu : usr=0.04%, sys=1.67%, ctx=1311, 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=179314: Tue Aug 4 19:19:42 2026 read: IOPS=6, BW=107KiB/s (109kB/s)(6032KiB/56448msec) clat (msec): min=9, max=303, avg=59.65, stdev=45.90 lat (msec): min=9, max=303, avg=59.65, stdev=45.90 clat percentiles (msec): | 1.00th=[ 11], 5.00th=[ 18], 10.00th=[ 21], 20.00th=[ 28], | 30.00th=[ 33], 40.00th=[ 37], 50.00th=[ 46], 60.00th=[ 53], | 70.00th=[ 62], 80.00th=[ 82], 90.00th=[ 125], 95.00th=[ 165], | 99.00th=[ 215], 99.50th=[ 257], 99.90th=[ 305], 99.95th=[ 305], | 99.99th=[ 305] bw ( KiB/s): min= 31, max= 286, per=28.45%, avg=109.51, stdev=60.33, samples=107 iops : min= 1, max= 17, avg= 6.07, stdev= 3.81, samples=107 write: IOPS=6, BW=111KiB/s (113kB/s)(6256KiB/56448msec); 0 zone resets clat (msec): min=16, max=364, avg=86.65, stdev=56.37 lat (msec): min=16, max=364, avg=86.66, stdev=56.37 clat percentiles (msec): | 1.00th=[ 20], 5.00th=[ 29], 10.00th=[ 36], 20.00th=[ 44], | 30.00th=[ 53], 40.00th=[ 61], 50.00th=[ 71], 60.00th=[ 81], | 70.00th=[ 96], 80.00th=[ 127], 90.00th=[ 163], 95.00th=[ 190], | 99.00th=[ 288], 99.50th=[ 338], 99.90th=[ 368], 99.95th=[ 368], | 99.99th=[ 368] bw ( KiB/s): min= 31, max= 319, per=27.11%, avg=110.34, stdev=59.06, samples=111 iops : min= 1, max= 19, avg= 6.12, stdev= 3.74, samples=111 lat (msec) : 10=0.26%, 20=4.30%, 50=36.98%, 100=36.59%, 250=20.31% lat (msec) : 500=1.56% cpu : usr=0.04%, sys=1.69%, ctx=1341, 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=386KiB/s (395kB/s), 85.3KiB/s-112KiB/s (87.4kB/s-115kB/s), io=21.4MiB (22.4MB), run=45192-56739msec WRITE: bw=408KiB/s (418kB/s), 95.2KiB/s-115KiB/s (97.5kB/s-118kB/s), io=22.6MiB (23.7MB), run=45192-56739msec 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=179331: Tue Aug 4 19:20:13 2026 read: IOPS=0, BW=827KiB/s (847kB/s)(7168KiB/8667msec) clat (msec): min=94, max=4147, avg=833.71, stdev=1465.92 lat (msec): min=94, max=4147, avg=833.71, stdev=1465.92 clat percentiles (msec): | 1.00th=[ 95], 5.00th=[ 95], 10.00th=[ 95], 20.00th=[ 194], | 30.00th=[ 253], 40.00th=[ 253], 50.00th=[ 342], 60.00th=[ 372], | 70.00th=[ 372], 80.00th=[ 435], 90.00th=[ 4144], 95.00th=[ 4144], | 99.00th=[ 4144], 99.50th=[ 4144], 99.90th=[ 4144], 99.95th=[ 4144], | 99.99th=[ 4144] bw ( KiB/s): min= 2027, max= 6144, per=100.00%, avg=4075.33, stdev=2058.58, samples=3 iops : min= 1, max= 6, avg= 3.33, stdev= 2.52, samples=3 write: IOPS=0, BW=591KiB/s (605kB/s)(5120KiB/8667msec); 0 zone resets clat (msec): min=41, max=1881, avg=505.41, stdev=782.43 lat (msec): min=41, max=1881, avg=505.47, stdev=782.43 clat percentiles (msec): | 1.00th=[ 42], 5.00th=[ 42], 10.00th=[ 42], 20.00th=[ 42], | 30.00th=[ 80], 40.00th=[ 80], 50.00th=[ 123], 60.00th=[ 123], | 70.00th=[ 401], 80.00th=[ 401], 90.00th=[ 1888], 95.00th=[ 1888], | 99.00th=[ 1888], 99.50th=[ 1888], 99.90th=[ 1888], 99.95th=[ 1888], | 99.99th=[ 1888] bw ( KiB/s): min= 1996, max= 3757, per=92.42%, avg=2593.33, stdev=1007.88, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 lat (msec) : 50=8.33%, 100=16.67%, 250=16.67%, 500=41.67%, 2000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=3.28%, ctx=111, 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=179332: Tue Aug 4 19:20:13 2026 read: IOPS=0, BW=200KiB/s (205kB/s)(2048KiB/10216msec) clat (msec): min=519, max=2121, avg=1320.79, stdev=1132.65 lat (msec): min=519, max=2121, avg=1320.80, stdev=1132.65 clat percentiles (msec): | 1.00th=[ 518], 5.00th=[ 518], 10.00th=[ 518], 20.00th=[ 518], | 30.00th=[ 518], 40.00th=[ 518], 50.00th=[ 518], 60.00th=[ 2123], | 70.00th=[ 2123], 80.00th=[ 2123], 90.00th=[ 2123], 95.00th=[ 2123], | 99.00th=[ 2123], 99.50th=[ 2123], 99.90th=[ 2123], 99.95th=[ 2123], | 99.99th=[ 2123] bw ( KiB/s): min= 2003, max= 2035, per=100.00%, avg=2019.00, stdev=22.63, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=0, BW=1002KiB/s (1026kB/s)(10.0MiB/10216msec); 0 zone resets clat (msec): min=144, max=4733, avg=736.97, stdev=1408.26 lat (msec): min=144, max=4733, avg=737.04, stdev=1408.26 clat percentiles (msec): | 1.00th=[ 146], 5.00th=[ 146], 10.00th=[ 146], 20.00th=[ 180], | 30.00th=[ 228], 40.00th=[ 236], 50.00th=[ 284], 60.00th=[ 305], | 70.00th=[ 388], 80.00th=[ 388], 90.00th=[ 489], 95.00th=[ 4732], | 99.00th=[ 4732], 99.50th=[ 4732], 99.90th=[ 4732], 99.95th=[ 4732], | 99.99th=[ 4732] bw ( KiB/s): min= 1996, max= 6083, per=100.00%, avg=3211.80, stdev=1808.73, samples=5 iops : min= 1, max= 5, avg= 2.20, stdev= 1.79, samples=5 lat (msec) : 250=33.33%, 500=41.67%, 750=8.33%, >=2000=16.67% cpu : usr=0.00%, sys=5.69%, ctx=285, 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=179334: Tue Aug 4 19:20:13 2026 read: IOPS=0, BW=742KiB/s (760kB/s)(6144KiB/8275msec) clat (msec): min=87, max=4807, avg=1001.67, stdev=1871.82 lat (msec): min=87, max=4807, avg=1001.67, stdev=1871.82 clat percentiles (msec): | 1.00th=[ 88], 5.00th=[ 88], 10.00th=[ 88], 20.00th=[ 113], | 30.00th=[ 113], 40.00th=[ 190], 50.00th=[ 190], 60.00th=[ 262], | 70.00th=[ 550], 80.00th=[ 550], 90.00th=[ 4799], 95.00th=[ 4799], | 99.00th=[ 4799], 99.50th=[ 4799], 99.90th=[ 4799], 99.95th=[ 4799], | 99.99th=[ 4799] bw ( KiB/s): min= 2003, max= 4087, per=100.00%, avg=2545.25, stdev=1028.03, samples=4 iops : min= 1, max= 3, avg= 1.75, stdev= 0.96, samples=4 write: IOPS=0, BW=742KiB/s (760kB/s)(6144KiB/8275msec); 0 zone resets clat (msec): min=192, max=533, avg=366.31, stdev=128.10 lat (msec): min=193, max=533, avg=366.39, stdev=128.10 clat percentiles (msec): | 1.00th=[ 192], 5.00th=[ 192], 10.00th=[ 192], 20.00th=[ 284], | 30.00th=[ 284], 40.00th=[ 334], 50.00th=[ 334], 60.00th=[ 368], | 70.00th=[ 493], 80.00th=[ 493], 90.00th=[ 535], 95.00th=[ 535], | 99.00th=[ 535], 99.50th=[ 535], 99.90th=[ 535], 99.95th=[ 535], | 99.99th=[ 535] bw ( KiB/s): min= 1643, max= 4087, per=84.11%, avg=2360.20, stdev=979.46, samples=5 iops : min= 1, max= 3, avg= 1.60, stdev= 0.89, samples=5 lat (msec) : 100=8.33%, 250=25.00%, 500=41.67%, 750=16.67%, >=2000=8.33% cpu : usr=0.01%, sys=6.93%, ctx=622, 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=179335: Tue Aug 4 19:20:13 2026 read: IOPS=0, BW=645KiB/s (660kB/s)(5120KiB/7942msec) clat (usec): min=745, max=213050, avg=75190.35, stdev=103297.97 lat (usec): min=746, max=213051, avg=75191.32, stdev=103298.19 clat percentiles (usec): | 1.00th=[ 750], 5.00th=[ 750], 10.00th=[ 750], 20.00th=[ 750], | 30.00th=[ 799], 40.00th=[ 799], 50.00th=[ 1500], 60.00th=[ 1500], | 70.00th=[160433], 80.00th=[160433], 90.00th=[212861], 95.00th=[212861], | 99.00th=[212861], 99.50th=[212861], 99.90th=[212861], 99.95th=[212861], | 99.99th=[212861] bw ( KiB/s): min= 7515, max= 7515, per=100.00%, avg=7515.00, stdev= 0.00, samples=1 iops : min= 7, max= 7, avg= 7.00, stdev= 0.00, samples=1 write: IOPS=0, BW=903KiB/s (924kB/s)(7168KiB/7942msec); 0 zone resets clat (msec): min=283, max=3514, avg=1063.64, stdev=1253.33 lat (msec): min=283, max=3514, avg=1063.84, stdev=1253.25 clat percentiles (msec): | 1.00th=[ 284], 5.00th=[ 284], 10.00th=[ 284], 20.00th=[ 296], | 30.00th=[ 326], 40.00th=[ 326], 50.00th=[ 418], 60.00th=[ 550], | 70.00th=[ 550], 80.00th=[ 2056], 90.00th=[ 3507], 95.00th=[ 3507], | 99.00th=[ 3507], 99.50th=[ 3507], 99.90th=[ 3507], 99.95th=[ 3507], | 99.99th=[ 3507] bw ( KiB/s): min= 2043, max= 4055, per=100.00%, avg=3048.25, stdev=1157.88, samples=4 iops : min= 1, max= 3, avg= 2.25, stdev= 0.96, samples=4 lat (usec) : 750=8.33%, 1000=8.33% lat (msec) : 2=8.33%, 250=16.67%, 500=33.33%, 750=8.33%, >=2000=16.67% cpu : usr=0.00%, sys=4.85%, ctx=187, 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=2005KiB/s (2053kB/s), 200KiB/s-827KiB/s (205kB/s-847kB/s), io=20.0MiB (20.0MB), run=7942-10216msec WRITE: bw=2807KiB/s (2874kB/s), 591KiB/s-1002KiB/s (605kB/s-1026kB/s), io=28.0MiB (29.4MB), run=7942-10216msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179336: Tue Aug 4 19:20:14 2026 read: IOPS=0, BW=740KiB/s (758kB/s)(7168KiB/9689msec) clat (msec): min=96, max=3859, avg=790.03, stdev=1366.41 lat (msec): min=96, max=3859, avg=790.03, stdev=1366.41 clat percentiles (msec): | 1.00th=[ 97], 5.00th=[ 97], 10.00th=[ 97], 20.00th=[ 107], | 30.00th=[ 159], 40.00th=[ 159], 50.00th=[ 245], 60.00th=[ 502], | 70.00th=[ 502], 80.00th=[ 567], 90.00th=[ 3876], 95.00th=[ 3876], | 99.00th=[ 3876], 99.50th=[ 3876], 99.90th=[ 3876], 99.95th=[ 3876], | 99.99th=[ 3876] bw ( KiB/s): min= 1469, max= 4015, per=100.00%, avg=2304.40, stdev=984.92, samples=5 iops : min= 1, max= 3, avg= 1.40, stdev= 0.89, samples=5 write: IOPS=0, BW=528KiB/s (541kB/s)(5120KiB/9689msec); 0 zone resets clat (msec): min=149, max=2270, avg=784.64, stdev=881.02 lat (msec): min=149, max=2271, avg=784.96, stdev=881.26 clat percentiles (msec): | 1.00th=[ 150], 5.00th=[ 150], 10.00th=[ 150], 20.00th=[ 150], | 30.00th=[ 153], 40.00th=[ 153], 50.00th=[ 489], 60.00th=[ 489], | 70.00th=[ 860], 80.00th=[ 860], 90.00th=[ 2265], 95.00th=[ 2265], | 99.00th=[ 2265], 99.50th=[ 2265], 99.90th=[ 2265], 99.95th=[ 2265], | 99.99th=[ 2265] bw ( KiB/s): min= 2027, max= 4071, per=100.00%, avg=2711.00, stdev=1177.80, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 lat (msec) : 100=8.33%, 250=41.67%, 500=8.33%, 750=16.67%, 1000=8.33% lat (msec) : >=2000=16.67% cpu : usr=0.01%, sys=1.94%, 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=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=179337: Tue Aug 4 19:20:14 2026 read: IOPS=0, BW=192KiB/s (197kB/s)(2048KiB/10648msec) clat (msec): min=183, max=1596, avg=889.72, stdev=998.84 lat (msec): min=183, max=1596, avg=889.72, stdev=998.85 clat percentiles (msec): | 1.00th=[ 184], 5.00th=[ 184], 10.00th=[ 184], 20.00th=[ 184], | 30.00th=[ 184], 40.00th=[ 184], 50.00th=[ 184], 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= 1946, max= 1984, per=100.00%, avg=1965.00, stdev=26.87, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=0, BW=962KiB/s (985kB/s)(10.0MiB/10648msec); 0 zone resets clat (msec): min=110, max=5347, avg=825.20, stdev=1601.29 lat (msec): min=110, max=5348, avg=825.28, stdev=1601.29 clat percentiles (msec): | 1.00th=[ 111], 5.00th=[ 111], 10.00th=[ 111], 20.00th=[ 133], | 30.00th=[ 140], 40.00th=[ 184], 50.00th=[ 262], 60.00th=[ 338], | 70.00th=[ 514], 80.00th=[ 567], 90.00th=[ 659], 95.00th=[ 5336], | 99.00th=[ 5336], 99.50th=[ 5336], 99.90th=[ 5336], 99.95th=[ 5336], | 99.99th=[ 5336] bw ( KiB/s): min= 1969, max= 4087, per=100.00%, avg=2830.80, stdev=1143.36, samples=5 iops : min= 1, max= 3, avg= 1.80, stdev= 1.10, samples=5 lat (msec) : 250=41.67%, 500=16.67%, 750=25.00%, 2000=8.33%, >=2000=8.33% cpu : usr=0.01%, sys=1.91%, ctx=89, 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=179338: Tue Aug 4 19:20:14 2026 read: IOPS=0, BW=713KiB/s (730kB/s)(6144KiB/8623msec) clat (msec): min=63, max=2476, avg=536.96, stdev=951.65 lat (msec): min=63, max=2476, avg=536.97, stdev=951.65 clat percentiles (msec): | 1.00th=[ 64], 5.00th=[ 64], 10.00th=[ 64], 20.00th=[ 144], | 30.00th=[ 144], 40.00th=[ 148], 50.00th=[ 148], 60.00th=[ 153], | 70.00th=[ 239], 80.00th=[ 239], 90.00th=[ 2467], 95.00th=[ 2467], | 99.00th=[ 2467], 99.50th=[ 2467], 99.90th=[ 2467], 99.95th=[ 2467], | 99.99th=[ 2467] bw ( KiB/s): min= 2007, max= 4079, per=100.00%, avg=2529.00, stdev=1033.36, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 write: IOPS=0, BW=713KiB/s (730kB/s)(6144KiB/8623msec); 0 zone resets clat (msec): min=182, max=3243, avg=868.87, stdev=1189.18 lat (msec): min=182, max=3243, avg=868.97, stdev=1189.18 clat percentiles (msec): | 1.00th=[ 182], 5.00th=[ 182], 10.00th=[ 182], 20.00th=[ 220], | 30.00th=[ 220], 40.00th=[ 305], 50.00th=[ 305], 60.00th=[ 397], | 70.00th=[ 869], 80.00th=[ 869], 90.00th=[ 3239], 95.00th=[ 3239], | 99.00th=[ 3239], 99.50th=[ 3239], 99.90th=[ 3239], 99.95th=[ 3239], | 99.99th=[ 3239] bw ( KiB/s): min= 1458, max= 4015, per=88.25%, avg=2375.75, stdev=1123.95, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 lat (msec) : 100=8.33%, 250=50.00%, 500=16.67%, 1000=8.33%, >=2000=16.67% cpu : usr=0.05%, sys=1.82%, ctx=129, 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=179339: Tue Aug 4 19:20:14 2026 read: IOPS=0, BW=506KiB/s (519kB/s)(5120KiB/10111msec) clat (msec): min=104, max=724, avg=355.67, stdev=261.82 lat (msec): min=104, max=724, avg=355.68, stdev=261.82 clat percentiles (msec): | 1.00th=[ 105], 5.00th=[ 105], 10.00th=[ 105], 20.00th=[ 105], | 30.00th=[ 110], 40.00th=[ 110], 50.00th=[ 368], 60.00th=[ 368], | 70.00th=[ 477], 80.00th=[ 477], 90.00th=[ 726], 95.00th=[ 726], | 99.00th=[ 726], 99.50th=[ 726], 99.90th=[ 726], 99.95th=[ 726], | 99.99th=[ 726] bw ( KiB/s): min= 1984, max= 2043, per=100.00%, avg=2018.25, stdev=26.58, samples=4 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=4 write: IOPS=0, BW=709KiB/s (726kB/s)(7168KiB/10111msec); 0 zone resets clat (msec): min=87, max=3624, avg=1180.74, stdev=1313.89 lat (msec): min=87, max=3625, avg=1180.98, stdev=1314.24 clat percentiles (msec): | 1.00th=[ 88], 5.00th=[ 88], 10.00th=[ 88], 20.00th=[ 184], | 30.00th=[ 464], 40.00th=[ 464], 50.00th=[ 735], 60.00th=[ 827], | 70.00th=[ 827], 80.00th=[ 2333], 90.00th=[ 3641], 95.00th=[ 3641], | 99.00th=[ 3641], 99.50th=[ 3641], 99.90th=[ 3641], 99.95th=[ 3641], | 99.99th=[ 3641] bw ( KiB/s): min= 1969, max= 2035, per=74.23%, avg=1998.20, stdev=24.67, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 lat (msec) : 100=8.33%, 250=25.00%, 500=25.00%, 750=16.67%, 1000=8.33% lat (msec) : >=2000=16.67% cpu : usr=0.01%, sys=1.52%, ctx=85, 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=1923KiB/s (1970kB/s), 192KiB/s-740KiB/s (197kB/s-758kB/s), io=20.0MiB (20.0MB), run=8623-10648msec WRITE: bw=2693KiB/s (2757kB/s), 528KiB/s-962KiB/s (541kB/s-985kB/s), io=28.0MiB (29.4MB), run=8623-10648msec 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=179347: Tue Aug 4 19:20:35 2026 read: IOPS=0, BW=2628KiB/s (2692kB/s)(12.0MiB/4675msec) clat (msec): min=1162, max=2190, avg=1546.98, stdev=561.01 lat (msec): min=1162, max=2190, avg=1546.98, stdev=561.01 clat percentiles (msec): | 1.00th=[ 1167], 5.00th=[ 1167], 10.00th=[ 1167], 20.00th=[ 1167], | 30.00th=[ 1167], 40.00th=[ 1284], 50.00th=[ 1284], 60.00th=[ 1284], | 70.00th=[ 2198], 80.00th=[ 2198], 90.00th=[ 2198], 95.00th=[ 2198], | 99.00th=[ 2198], 99.50th=[ 2198], 99.90th=[ 2198], 99.95th=[ 2198], | 99.99th=[ 2198] bw ( KiB/s): min= 7922, max= 8192, per=100.00%, avg=8057.00, stdev=190.92, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 2000=66.67%, >=2000=33.33% cpu : usr=0.00%, sys=6.12%, ctx=269, 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=179348: Tue Aug 4 19:20:35 2026 read: IOPS=0, BW=794KiB/s (813kB/s)(4096KiB/5158msec) clat (nsec): min=1288.7M, max=1288.7M, avg=1288688063.00, stdev= 0.00 lat (nsec): min=1288.7M, max=1288.7M, avg=1288690425.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1284], 5.00th=[ 1284], 10.00th=[ 1284], 20.00th=[ 1284], | 30.00th=[ 1284], 40.00th=[ 1284], 50.00th=[ 1284], 60.00th=[ 1284], | 70.00th=[ 1284], 80.00th=[ 1284], 90.00th=[ 1284], 95.00th=[ 1284], | 99.00th=[ 1284], 99.50th=[ 1284], 99.90th=[ 1284], 99.95th=[ 1284], | 99.99th=[ 1284] bw ( KiB/s): min= 7922, max= 7922, per=100.00%, avg=7922.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=1588KiB/s (1626kB/s)(8192KiB/5158msec); 0 zone resets clat (msec): min=911, max=2924, avg=1917.73, stdev=1423.13 lat (msec): min=911, max=2924, avg=1918.05, stdev=1423.08 clat percentiles (msec): | 1.00th=[ 911], 5.00th=[ 911], 10.00th=[ 911], 20.00th=[ 911], | 30.00th=[ 911], 40.00th=[ 911], 50.00th=[ 911], 60.00th=[ 2937], | 70.00th=[ 2937], 80.00th=[ 2937], 90.00th=[ 2937], 95.00th=[ 2937], | 99.00th=[ 2937], 99.50th=[ 2937], 99.90th=[ 2937], 99.95th=[ 2937], | 99.99th=[ 2937] bw ( KiB/s): min= 8192, max= 8192, per=100.00%, avg=8192.00, stdev= 0.00, samples=1 iops : min= 2, max= 2, avg= 2.00, stdev= 0.00, samples=1 lat (msec) : 1000=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=1.78%, ctx=46, 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=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=179349: Tue Aug 4 19:20:35 2026 write: IOPS=0, BW=3464KiB/s (3547kB/s)(12.0MiB/3547msec); 0 zone resets clat (msec): min=712, max=1917, avg=1161.57, stdev=658.92 lat (msec): min=715, max=1918, avg=1163.06, stdev=657.78 clat percentiles (msec): | 1.00th=[ 709], 5.00th=[ 709], 10.00th=[ 709], 20.00th=[ 709], | 30.00th=[ 709], 40.00th=[ 852], 50.00th=[ 852], 60.00th=[ 852], | 70.00th=[ 1921], 80.00th=[ 1921], 90.00th=[ 1921], 95.00th=[ 1921], | 99.00th=[ 1921], 99.50th=[ 1921], 99.90th=[ 1921], 99.95th=[ 1921], | 99.99th=[ 1921] bw ( KiB/s): min= 7922, max= 8110, per=100.00%, avg=8016.00, stdev=132.94, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=2.45%, 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 rand-rw: (groupid=0, jobs=1): err= 0: pid=179350: Tue Aug 4 19:20:35 2026 write: IOPS=0, BW=2387KiB/s (2444kB/s)(12.0MiB/5148msec); 0 zone resets clat (msec): min=351, max=3733, avg=1701.13, stdev=1791.74 lat (msec): min=353, max=3734, avg=1702.05, stdev=1791.15 clat percentiles (msec): | 1.00th=[ 351], 5.00th=[ 351], 10.00th=[ 351], 20.00th=[ 351], | 30.00th=[ 351], 40.00th=[ 1020], 50.00th=[ 1020], 60.00th=[ 1020], | 70.00th=[ 3742], 80.00th=[ 3742], 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= 7907, max= 8110, per=100.00%, avg=8008.50, stdev=143.54, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=1.88%, ctx=43, 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 Run status group 0 (all jobs): READ: bw=3176KiB/s (3253kB/s), 794KiB/s-2628KiB/s (813kB/s-2692kB/s), io=16.0MiB (16.8MB), run=4675-5158msec WRITE: bw=6353KiB/s (6505kB/s), 1588KiB/s-3464KiB/s (1626kB/s-3547kB/s), io=32.0MiB (33.6MB), run=3547-5158msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179352: Tue Aug 4 19:20:36 2026 read: IOPS=0, BW=2422KiB/s (2480kB/s)(12.0MiB/5074msec) clat (msec): min=433, max=2762, avg=1666.66, stdev=1170.30 lat (msec): min=433, max=2762, avg=1666.66, stdev=1170.30 clat percentiles (msec): | 1.00th=[ 435], 5.00th=[ 435], 10.00th=[ 435], 20.00th=[ 435], | 30.00th=[ 435], 40.00th=[ 1804], 50.00th=[ 1804], 60.00th=[ 1804], | 70.00th=[ 2769], 80.00th=[ 2769], 90.00th=[ 2769], 95.00th=[ 2769], | 99.00th=[ 2769], 99.50th=[ 2769], 99.90th=[ 2769], 99.95th=[ 2769], | 99.99th=[ 2769] bw ( KiB/s): min= 8143, max= 8159, per=100.00%, avg=8151.00, stdev=11.31, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=1.66%, ctx=37, 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=179353: Tue Aug 4 19:20:36 2026 read: IOPS=0, BW=703KiB/s (719kB/s)(4096KiB/5830msec) clat (nsec): min=1078.7M, max=1078.7M, avg=1078730510.00, stdev= 0.00 lat (nsec): min=1078.7M, max=1078.7M, avg=1078732650.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1083], 5.00th=[ 1083], 10.00th=[ 1083], 20.00th=[ 1083], | 30.00th=[ 1083], 40.00th=[ 1083], 50.00th=[ 1083], 60.00th=[ 1083], | 70.00th=[ 1083], 80.00th=[ 1083], 90.00th=[ 1083], 95.00th=[ 1083], | 99.00th=[ 1083], 99.50th=[ 1083], 99.90th=[ 1083], 99.95th=[ 1083], | 99.99th=[ 1083] bw ( KiB/s): min= 7831, max= 7831, per=100.00%, avg=7831.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=1405KiB/s (1439kB/s)(8192KiB/5830msec); 0 zone resets clat (msec): min=1635, max=3109, avg=2372.54, stdev=1042.78 lat (msec): min=1636, max=3110, avg=2373.59, stdev=1041.77 clat percentiles (msec): | 1.00th=[ 1636], 5.00th=[ 1636], 10.00th=[ 1636], 20.00th=[ 1636], | 30.00th=[ 1636], 40.00th=[ 1636], 50.00th=[ 1636], 60.00th=[ 3104], | 70.00th=[ 3104], 80.00th=[ 3104], 90.00th=[ 3104], 95.00th=[ 3104], | 99.00th=[ 3104], 99.50th=[ 3104], 99.90th=[ 3104], 99.95th=[ 3104], | 99.99th=[ 3104] bw ( KiB/s): min= 8015, max= 8015, per=100.00%, avg=8015.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 2000=66.67%, >=2000=33.33% cpu : usr=0.19%, sys=1.66%, ctx=39, majf=0, minf=10 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1,2,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179354: Tue Aug 4 19:20:36 2026 write: IOPS=0, BW=2089KiB/s (2139kB/s)(12.0MiB/5882msec); 0 zone resets clat (msec): min=577, max=2974, avg=1957.67, stdev=1239.28 lat (msec): min=580, max=2974, avg=1959.20, stdev=1237.56 clat percentiles (msec): | 1.00th=[ 575], 5.00th=[ 575], 10.00th=[ 575], 20.00th=[ 575], | 30.00th=[ 575], 40.00th=[ 2333], 50.00th=[ 2333], 60.00th=[ 2333], | 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= 4481, max= 7876, per=100.00%, avg=6178.50, stdev=2400.63, 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=0.09%, sys=1.87%, ctx=66, 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=179355: Tue Aug 4 19:20:36 2026 write: IOPS=0, BW=3044KiB/s (3117kB/s)(12.0MiB/4037msec); 0 zone resets clat (msec): min=941, max=1744, avg=1343.90, stdev=401.31 lat (msec): min=942, max=1744, avg=1344.34, stdev=401.37 clat percentiles (msec): | 1.00th=[ 944], 5.00th=[ 944], 10.00th=[ 944], 20.00th=[ 944], | 30.00th=[ 944], 40.00th=[ 1351], 50.00th=[ 1351], 60.00th=[ 1351], | 70.00th=[ 1737], 80.00th=[ 1737], 90.00th=[ 1737], 95.00th=[ 1737], | 99.00th=[ 1737], 99.50th=[ 1737], 99.90th=[ 1737], 99.95th=[ 1737], | 99.99th=[ 1737] bw ( KiB/s): min= 4481, max= 7831, per=100.00%, avg=6156.00, stdev=2368.81, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 1000=33.33%, 2000=66.67% cpu : usr=0.00%, sys=1.29%, ctx=37, majf=0, minf=8 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=2810KiB/s (2878kB/s), 703KiB/s-2422KiB/s (719kB/s-2480kB/s), io=16.0MiB (16.8MB), run=5074-5830msec WRITE: bw=5571KiB/s (5705kB/s), 1405KiB/s-3044KiB/s (1439kB/s-3117kB/s), io=32.0MiB (33.6MB), run=4037-5882msec