== sanity test 398b: DIO and buffer IO race ============== 06:02:00 (1768129320) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 3.35582 s, 15.0 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=158244: Sun Jan 11 06:02:58 2026 read: IOPS=30, BW=122KiB/s (125kB/s)(5992KiB/49262msec) clat (usec): min=84, max=689019, avg=16488.93, stdev=20470.58 lat (usec): min=85, max=689020, avg=16489.53, stdev=20470.58 clat percentiles (usec): | 1.00th=[ 262], 5.00th=[ 461], 10.00th=[ 6718], 20.00th=[ 8586], | 30.00th=[ 9896], 40.00th=[ 11338], 50.00th=[ 13435], 60.00th=[ 16188], | 70.00th=[ 19268], 80.00th=[ 23200], 90.00th=[ 28705], 95.00th=[ 35390], | 99.00th=[ 51119], 99.50th=[ 71828], 99.90th=[109577], 99.95th=[692061], | 99.99th=[692061] bw ( KiB/s): min= 7, max= 224, per=24.93%, avg=121.39, stdev=37.95, samples=98 iops : min= 1, max= 56, avg=30.11, stdev= 9.55, samples=98 write: IOPS=31, BW=128KiB/s (131kB/s)(6296KiB/49262msec); 0 zone resets clat (usec): min=654, max=111960, avg=15481.92, stdev=13894.23 lat (usec): min=655, max=111961, avg=15483.36, stdev=13894.26 clat percentiles (usec): | 1.00th=[ 742], 5.00th=[ 1385], 10.00th=[ 2507], 20.00th=[ 3294], | 30.00th=[ 4883], 40.00th=[ 9110], 50.00th=[ 12256], 60.00th=[ 15533], | 70.00th=[ 19792], 80.00th=[ 25035], 90.00th=[ 33817], 95.00th=[ 41681], | 99.00th=[ 62129], 99.50th=[ 68682], 99.90th=[ 90702], 99.95th=[111674], | 99.99th=[111674] bw ( KiB/s): min= 56, max= 231, per=25.26%, avg=128.81, stdev=38.63, samples=97 iops : min= 14, max= 57, avg=31.98, stdev= 9.66, samples=97 lat (usec) : 100=0.16%, 250=0.29%, 500=2.15%, 750=0.94%, 1000=0.98% lat (msec) : 2=2.38%, 4=9.77%, 10=20.15%, 20=34.28%, 50=27.12% lat (msec) : 100=1.66%, 250=0.10%, 750=0.03% cpu : usr=0.06%, sys=25.28%, ctx=7903, 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=158246: Sun Jan 11 06:02:58 2026 read: IOPS=30, BW=123KiB/s (126kB/s)(5940KiB/48172msec) clat (usec): min=70, max=706855, avg=16568.63, stdev=21539.72 lat (usec): min=70, max=706856, avg=16569.30, stdev=21539.74 clat percentiles (usec): | 1.00th=[ 198], 5.00th=[ 465], 10.00th=[ 6652], 20.00th=[ 8586], | 30.00th=[ 9896], 40.00th=[ 11469], 50.00th=[ 13042], 60.00th=[ 15795], | 70.00th=[ 19006], 80.00th=[ 22676], 90.00th=[ 28705], 95.00th=[ 33817], | 99.00th=[ 55837], 99.50th=[ 82314], 99.90th=[158335], 99.95th=[708838], | 99.99th=[708838] bw ( KiB/s): min= 16, max= 216, per=25.50%, avg=124.19, stdev=36.62, samples=94 iops : min= 4, max= 54, avg=30.82, stdev= 9.22, samples=94 write: IOPS=32, BW=132KiB/s (135kB/s)(6348KiB/48172msec); 0 zone resets clat (usec): min=664, max=104084, avg=14724.95, stdev=13457.56 lat (usec): min=665, max=104084, avg=14726.12, stdev=13457.36 clat percentiles (usec): | 1.00th=[ 734], 5.00th=[ 1336], 10.00th=[ 2376], 20.00th=[ 3195], | 30.00th=[ 4293], 40.00th=[ 7963], 50.00th=[ 11600], 60.00th=[ 14353], | 70.00th=[ 19006], 80.00th=[ 25297], 90.00th=[ 32375], 95.00th=[ 39060], | 99.00th=[ 57934], 99.50th=[ 69731], 99.90th=[101188], 99.95th=[104334], | 99.99th=[104334] bw ( KiB/s): min= 40, max= 223, per=25.77%, avg=131.41, stdev=37.71, samples=94 iops : min= 10, max= 55, avg=32.63, stdev= 9.46, samples=94 lat (usec) : 100=0.20%, 250=0.46%, 500=1.99%, 750=0.98%, 1000=1.07% lat (msec) : 2=2.34%, 4=10.74%, 10=20.31%, 20=34.54%, 50=25.72% lat (msec) : 100=1.46%, 250=0.16%, 750=0.03% cpu : usr=0.08%, sys=25.43%, ctx=7647, 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=158248: Sun Jan 11 06:02:58 2026 read: IOPS=30, BW=124KiB/s (127kB/s)(6028KiB/48740msec) clat (usec): min=90, max=86777, avg=15724.96, stdev=9980.22 lat (usec): min=90, max=86778, avg=15725.61, stdev=9980.26 clat percentiles (usec): | 1.00th=[ 204], 5.00th=[ 469], 10.00th=[ 6718], 20.00th=[ 8586], | 30.00th=[ 9896], 40.00th=[11600], 50.00th=[13435], 60.00th=[16057], | 70.00th=[19268], 80.00th=[22414], 90.00th=[28443], 95.00th=[32637], | 99.00th=[49546], 99.50th=[57410], 99.90th=[84411], 99.95th=[86508], | 99.99th=[86508] bw ( KiB/s): min= 56, max= 214, per=25.69%, avg=125.09, stdev=34.89, samples=96 iops : min= 14, max= 53, avg=31.04, stdev= 8.73, samples=96 write: IOPS=32, BW=128KiB/s (132kB/s)(6260KiB/48740msec); 0 zone resets clat (usec): min=677, max=688359, avg=15876.66, stdev=21860.18 lat (usec): min=677, max=688383, avg=15877.70, stdev=21860.77 clat percentiles (usec): | 1.00th=[ 734], 5.00th=[ 1958], 10.00th=[ 2573], 20.00th=[ 3261], | 30.00th=[ 4621], 40.00th=[ 8848], 50.00th=[ 12780], 60.00th=[ 16057], | 70.00th=[ 20317], 80.00th=[ 25560], 90.00th=[ 33162], 95.00th=[ 41157], | 99.00th=[ 58983], 99.50th=[ 66323], 99.90th=[170918], 99.95th=[692061], | 99.99th=[692061] bw ( KiB/s): min= 14, max= 224, per=25.16%, avg=128.30, stdev=37.00, samples=97 iops : min= 3, max= 56, avg=31.85, stdev= 9.27, samples=97 lat (usec) : 100=0.03%, 250=0.62%, 500=2.12%, 750=0.81%, 1000=0.72% lat (msec) : 2=1.60%, 4=11.23%, 10=19.50%, 20=34.21%, 50=27.54% lat (msec) : 100=1.56%, 250=0.03%, 750=0.03% cpu : usr=0.08%, sys=25.73%, ctx=7830, 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=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=158250: Sun Jan 11 06:02:58 2026 read: IOPS=30, BW=123KiB/s (126kB/s)(6052KiB/49132msec) clat (usec): min=99, max=105878, avg=15808.63, stdev=11125.75 lat (usec): min=99, max=105879, avg=15809.26, stdev=11125.77 clat percentiles (usec): | 1.00th=[ 281], 5.00th=[ 486], 10.00th=[ 6325], 20.00th=[ 8455], | 30.00th=[ 9896], 40.00th=[ 11076], 50.00th=[ 12780], 60.00th=[ 15270], | 70.00th=[ 18482], 80.00th=[ 22676], 90.00th=[ 29230], 95.00th=[ 35914], | 99.00th=[ 57410], 99.50th=[ 76022], 99.90th=[ 86508], 99.95th=[105382], | 99.99th=[105382] bw ( KiB/s): min= 24, max= 215, per=25.31%, avg=123.26, stdev=36.59, samples=96 iops : min= 6, max= 53, avg=30.58, stdev= 9.15, samples=96 write: IOPS=31, BW=127KiB/s (130kB/s)(6236KiB/49132msec); 0 zone resets clat (usec): min=668, max=748706, avg=16046.73, stdev=23159.52 lat (usec): min=668, max=748707, avg=16047.51, stdev=23159.55 clat percentiles (usec): | 1.00th=[ 734], 5.00th=[ 1401], 10.00th=[ 2409], 20.00th=[ 3294], | 30.00th=[ 4621], 40.00th=[ 9110], 50.00th=[ 12911], 60.00th=[ 16057], | 70.00th=[ 20579], 80.00th=[ 26084], 90.00th=[ 33162], 95.00th=[ 41157], | 99.00th=[ 55837], 99.50th=[ 70779], 99.90th=[162530], 99.95th=[750781], | 99.99th=[750781] bw ( KiB/s): min= 32, max= 248, per=24.92%, avg=127.09, stdev=40.12, samples=96 iops : min= 8, max= 62, avg=31.54, stdev=10.05, samples=96 lat (usec) : 100=0.03%, 250=0.39%, 500=2.15%, 750=1.07%, 1000=0.98% lat (msec) : 2=2.47%, 4=9.93%, 10=19.76%, 20=34.67%, 50=26.86% lat (msec) : 100=1.53%, 250=0.13%, 750=0.03% cpu : usr=0.08%, sys=25.31%, ctx=7840, 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=487KiB/s (499kB/s), 122KiB/s-124KiB/s (125kB/s-127kB/s), io=23.4MiB (24.6MB), run=48172-49262msec WRITE: bw=510KiB/s (523kB/s), 127KiB/s-132KiB/s (130kB/s-135kB/s), io=24.6MiB (25.7MB), run=48172-49262msec rand-rw: (groupid=0, jobs=1): err= 0: pid=158243: Sun Jan 11 06:03:32 2026 read: IOPS=18, BW=72.4KiB/s (74.1kB/s)(5992KiB/82807msec) clat (msec): min=2, max=694, avg=15.14, stdev=22.33 lat (msec): min=2, max=694, avg=15.14, stdev=22.33 clat percentiles (msec): | 1.00th=[ 4], 5.00th=[ 4], 10.00th=[ 5], 20.00th=[ 6], | 30.00th=[ 7], 40.00th=[ 8], 50.00th=[ 11], 60.00th=[ 14], | 70.00th=[ 17], 80.00th=[ 21], 90.00th=[ 32], 95.00th=[ 43], | 99.00th=[ 74], 99.50th=[ 81], 99.90th=[ 122], 99.95th=[ 693], | 99.99th=[ 693] bw ( KiB/s): min= 8, max= 184, per=25.26%, avg=72.74, stdev=38.08, samples=164 iops : min= 2, max= 46, avg=18.01, stdev= 9.59, samples=164 write: IOPS=19, BW=76.0KiB/s (77.9kB/s)(6296KiB/82807msec); 0 zone resets clat (msec): min=13, max=212, avg=38.07, stdev=17.69 lat (msec): min=13, max=212, avg=38.07, stdev=17.69 clat percentiles (msec): | 1.00th=[ 18], 5.00th=[ 21], 10.00th=[ 23], 20.00th=[ 26], | 30.00th=[ 28], 40.00th=[ 31], 50.00th=[ 33], 60.00th=[ 36], | 70.00th=[ 42], 80.00th=[ 50], 90.00th=[ 61], 95.00th=[ 73], | 99.00th=[ 95], 99.50th=[ 114], 99.90th=[ 161], 99.95th=[ 213], | 99.99th=[ 213] bw ( KiB/s): min= 23, max= 152, per=25.37%, avg=76.35, stdev=31.13, samples=164 iops : min= 5, max= 38, avg=18.91, stdev= 7.90, samples=164 lat (msec) : 4=3.61%, 10=20.74%, 20=15.63%, 50=48.99%, 100=10.51% lat (msec) : 250=0.49%, 750=0.03% cpu : usr=0.06%, sys=7.36%, ctx=5601, 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=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=158245: Sun Jan 11 06:03:32 2026 read: IOPS=17, BW=71.4KiB/s (73.1kB/s)(5940KiB/83229msec) clat (msec): min=2, max=702, avg=15.10, stdev=22.72 lat (msec): min=2, max=702, avg=15.10, stdev=22.72 clat percentiles (msec): | 1.00th=[ 4], 5.00th=[ 4], 10.00th=[ 5], 20.00th=[ 6], | 30.00th=[ 7], 40.00th=[ 8], 50.00th=[ 10], 60.00th=[ 14], | 70.00th=[ 17], 80.00th=[ 22], 90.00th=[ 31], 95.00th=[ 41], | 99.00th=[ 72], 99.50th=[ 82], 99.90th=[ 201], 99.95th=[ 701], | 99.99th=[ 701] bw ( KiB/s): min= 7, max= 176, per=24.90%, avg=71.72, stdev=39.10, samples=165 iops : min= 1, max= 44, avg=17.76, stdev= 9.87, samples=165 write: IOPS=19, BW=76.3KiB/s (78.1kB/s)(6348KiB/83229msec); 0 zone resets clat (msec): min=14, max=154, avg=38.19, stdev=17.10 lat (msec): min=14, max=154, avg=38.19, stdev=17.10 clat percentiles (msec): | 1.00th=[ 18], 5.00th=[ 21], 10.00th=[ 23], 20.00th=[ 26], | 30.00th=[ 28], 40.00th=[ 31], 50.00th=[ 34], 60.00th=[ 37], | 70.00th=[ 42], 80.00th=[ 50], 90.00th=[ 63], 95.00th=[ 73], | 99.00th=[ 94], 99.50th=[ 104], 99.90th=[ 148], 99.95th=[ 155], | 99.99th=[ 155] bw ( KiB/s): min= 24, max= 152, per=25.47%, avg=76.67, stdev=31.74, samples=165 iops : min= 6, max= 38, avg=18.99, stdev= 8.03, samples=165 lat (msec) : 4=3.84%, 10=20.57%, 20=14.91%, 50=49.48%, 100=10.71% lat (msec) : 250=0.46%, 750=0.03% cpu : usr=0.08%, sys=7.29%, ctx=5625, 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=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=158247: Sun Jan 11 06:03:32 2026 read: IOPS=18, BW=72.3KiB/s (74.1kB/s)(6028KiB/83349msec) clat (msec): min=2, max=200, avg=15.27, stdev=14.74 lat (msec): min=2, max=200, avg=15.27, stdev=14.74 clat percentiles (msec): | 1.00th=[ 4], 5.00th=[ 4], 10.00th=[ 5], 20.00th=[ 6], | 30.00th=[ 7], 40.00th=[ 8], 50.00th=[ 11], 60.00th=[ 14], | 70.00th=[ 18], 80.00th=[ 22], 90.00th=[ 31], 95.00th=[ 44], | 99.00th=[ 80], 99.50th=[ 85], 99.90th=[ 165], 99.95th=[ 201], | 99.99th=[ 201] bw ( KiB/s): min= 16, max= 208, per=25.19%, avg=72.55, stdev=36.72, samples=165 iops : min= 4, max= 52, avg=17.96, stdev= 9.26, samples=165 write: IOPS=18, BW=75.1KiB/s (76.9kB/s)(6260KiB/83349msec); 0 zone resets clat (msec): min=11, max=713, avg=38.42, stdev=24.35 lat (msec): min=11, max=713, avg=38.42, stdev=24.35 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 21], 10.00th=[ 23], 20.00th=[ 26], | 30.00th=[ 28], 40.00th=[ 31], 50.00th=[ 33], 60.00th=[ 36], | 70.00th=[ 42], 80.00th=[ 50], 90.00th=[ 63], 95.00th=[ 71], | 99.00th=[ 94], 99.50th=[ 124], 99.90th=[ 176], 99.95th=[ 718], | 99.99th=[ 718] bw ( KiB/s): min= 15, max= 152, per=24.99%, avg=75.21, stdev=32.07, samples=165 iops : min= 3, max= 38, avg=18.63, stdev= 8.12, samples=165 lat (msec) : 4=2.96%, 10=19.92%, 20=16.50%, 50=49.32%, 100=10.68% lat (msec) : 250=0.59%, 750=0.03% cpu : usr=0.08%, sys=7.32%, ctx=5699, 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=158249: Sun Jan 11 06:03:32 2026 read: IOPS=18, BW=72.7KiB/s (74.4kB/s)(6052KiB/83243msec) clat (msec): min=2, max=165, avg=14.65, stdev=13.94 lat (msec): min=2, max=165, avg=14.65, stdev=13.94 clat percentiles (msec): | 1.00th=[ 4], 5.00th=[ 4], 10.00th=[ 5], 20.00th=[ 6], | 30.00th=[ 7], 40.00th=[ 8], 50.00th=[ 11], 60.00th=[ 14], | 70.00th=[ 17], 80.00th=[ 22], 90.00th=[ 31], 95.00th=[ 42], | 99.00th=[ 65], 99.50th=[ 92], 99.90th=[ 109], 99.95th=[ 165], | 99.99th=[ 165] bw ( KiB/s): min= 7, max= 192, per=25.53%, avg=73.52, stdev=40.03, samples=164 iops : min= 1, max= 48, avg=18.21, stdev=10.10, samples=164 write: IOPS=18, BW=74.9KiB/s (76.7kB/s)(6236KiB/83243msec); 0 zone resets clat (msec): min=13, max=735, avg=39.05, stdev=25.49 lat (msec): min=13, max=735, avg=39.05, stdev=25.49 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 21], 10.00th=[ 23], 20.00th=[ 26], | 30.00th=[ 28], 40.00th=[ 31], 50.00th=[ 33], 60.00th=[ 37], | 70.00th=[ 42], 80.00th=[ 51], 90.00th=[ 63], 95.00th=[ 74], | 99.00th=[ 101], 99.50th=[ 124], 99.90th=[ 188], 99.95th=[ 735], | 99.99th=[ 735] bw ( KiB/s): min= 24, max= 152, per=25.00%, avg=75.26, stdev=31.30, samples=165 iops : min= 6, max= 38, avg=18.64, stdev= 7.92, samples=165 lat (msec) : 4=3.48%, 10=21.00%, 20=15.92%, 50=47.95%, 100=11.00% lat (msec) : 250=0.62%, 750=0.03% cpu : usr=0.07%, sys=7.21%, ctx=5649, 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=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=288KiB/s (295kB/s), 71.4KiB/s-72.7KiB/s (73.1kB/s-74.4kB/s), io=23.4MiB (24.6MB), run=82807-83349msec WRITE: bw=302KiB/s (309kB/s), 74.9KiB/s-76.3KiB/s (76.7kB/s-78.1kB/s), io=24.6MiB (25.7MB), run=82807-83349msec 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=158280: Sun Jan 11 06:03:50 2026 read: IOPS=33, BW=530KiB/s (543kB/s)(5920KiB/11168msec) clat (usec): min=81, max=80300, avg=14965.03, stdev=9787.77 lat (usec): min=82, max=80301, avg=14965.71, stdev=9787.77 clat percentiles (usec): | 1.00th=[ 110], 5.00th=[ 396], 10.00th=[ 474], 20.00th=[ 8979], | 30.00th=[10683], 40.00th=[12256], 50.00th=[14222], 60.00th=[16319], | 70.00th=[18482], 80.00th=[21365], 90.00th=[24773], 95.00th=[27919], | 99.00th=[56361], 99.50th=[69731], 99.90th=[80217], 99.95th=[80217], | 99.99th=[80217] bw ( KiB/s): min= 316, max= 734, per=26.14%, avg=530.95, stdev=127.19, samples=22 iops : min= 19, max= 45, avg=32.68, stdev= 7.97, samples=22 write: IOPS=35, BW=570KiB/s (584kB/s)(6368KiB/11168msec); 0 zone resets clat (usec): min=1073, max=98784, avg=14095.87, stdev=10645.58 lat (usec): min=1074, max=98785, avg=14097.12, stdev=10645.62 clat percentiles (usec): | 1.00th=[ 1156], 5.00th=[ 3523], 10.00th=[ 4359], 20.00th=[ 4948], | 30.00th=[ 6915], 40.00th=[ 9765], 50.00th=[11469], 60.00th=[13960], | 70.00th=[16712], 80.00th=[21103], 90.00th=[27657], 95.00th=[33817], | 99.00th=[47973], 99.50th=[56886], 99.90th=[99091], 99.95th=[99091], | 99.99th=[99091] bw ( KiB/s): min= 351, max= 832, per=26.65%, avg=569.41, stdev=121.27, samples=22 iops : min= 21, max= 52, avg=35.09, stdev= 7.70, samples=22 lat (usec) : 100=0.26%, 250=0.65%, 500=4.04%, 750=0.91% lat (msec) : 2=1.04%, 4=2.86%, 10=23.05%, 20=44.53%, 50=21.61% lat (msec) : 100=1.04% cpu : usr=0.17%, sys=31.82%, ctx=2481, 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=158281: Sun Jan 11 06:03:50 2026 read: IOPS=30, BW=489KiB/s (500kB/s)(5744KiB/11753msec) clat (usec): min=216, max=115075, avg=16075.55, stdev=9284.62 lat (usec): min=217, max=115075, avg=16076.19, stdev=9284.62 clat percentiles (usec): | 1.00th=[ 343], 5.00th=[ 457], 10.00th=[ 8029], 20.00th=[ 10290], | 30.00th=[ 11731], 40.00th=[ 13435], 50.00th=[ 15664], 60.00th=[ 16909], | 70.00th=[ 18482], 80.00th=[ 21890], 90.00th=[ 25822], 95.00th=[ 29230], | 99.00th=[ 39060], 99.50th=[ 44827], 99.90th=[114820], 99.95th=[114820], | 99.99th=[114820] bw ( KiB/s): min= 282, max= 702, per=24.18%, avg=491.09, stdev=113.58, samples=23 iops : min= 17, max= 43, avg=30.17, stdev= 7.27, samples=23 write: IOPS=34, BW=557KiB/s (570kB/s)(6544KiB/11753msec); 0 zone resets clat (usec): min=933, max=53046, avg=14400.63, stdev=9800.65 lat (usec): min=934, max=53048, avg=14401.78, stdev=9800.79 clat percentiles (usec): | 1.00th=[ 1123], 5.00th=[ 3851], 10.00th=[ 4621], 20.00th=[ 5800], | 30.00th=[ 7635], 40.00th=[ 9765], 50.00th=[11863], 60.00th=[14353], | 70.00th=[17433], 80.00th=[22414], 90.00th=[27919], 95.00th=[32637], | 99.00th=[44827], 99.50th=[47449], 99.90th=[53216], 99.95th=[53216], | 99.99th=[53216] bw ( KiB/s): min= 288, max= 862, per=26.19%, avg=559.61, stdev=144.08, samples=23 iops : min= 18, max= 53, avg=34.48, stdev= 8.96, samples=23 lat (usec) : 250=0.13%, 500=2.60%, 750=0.39%, 1000=0.26% lat (msec) : 2=1.43%, 4=1.95%, 10=23.44%, 20=44.14%, 50=25.39% lat (msec) : 100=0.13%, 250=0.13% cpu : usr=0.10%, sys=32.00%, ctx=2670, 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=158282: Sun Jan 11 06:03:50 2026 read: IOPS=33, BW=531KiB/s (543kB/s)(6256KiB/11788msec) clat (usec): min=317, max=65517, avg=15835.15, stdev=8847.75 lat (usec): min=317, max=65518, avg=15835.95, stdev=8847.72 clat percentiles (usec): | 1.00th=[ 330], 5.00th=[ 429], 10.00th=[ 5997], 20.00th=[10290], | 30.00th=[11731], 40.00th=[13304], 50.00th=[15270], 60.00th=[17695], | 70.00th=[19792], 80.00th=[21627], 90.00th=[25035], 95.00th=[28967], | 99.00th=[45351], 99.50th=[63701], 99.90th=[65274], 99.95th=[65274], | 99.99th=[65274] bw ( KiB/s): min= 255, max= 736, per=26.39%, avg=535.96, stdev=119.78, samples=23 iops : min= 15, max= 46, avg=33.00, stdev= 7.54, samples=23 write: IOPS=31, BW=512KiB/s (524kB/s)(6032KiB/11788msec); 0 zone resets clat (usec): min=1026, max=71194, avg=14724.28, stdev=10963.06 lat (usec): min=1026, max=71195, avg=14725.44, stdev=10963.19 clat percentiles (usec): | 1.00th=[ 1270], 5.00th=[ 3458], 10.00th=[ 4228], 20.00th=[ 5211], | 30.00th=[ 7308], 40.00th=[10159], 50.00th=[11863], 60.00th=[14353], | 70.00th=[18744], 80.00th=[22676], 90.00th=[27919], 95.00th=[33424], | 99.00th=[53216], 99.50th=[69731], 99.90th=[70779], 99.95th=[70779], | 99.99th=[70779] bw ( KiB/s): min= 320, max= 702, per=23.67%, avg=505.78, stdev=109.14, samples=23 iops : min= 20, max= 43, avg=31.09, stdev= 6.87, samples=23 lat (usec) : 500=4.04%, 750=0.65%, 1000=0.13% lat (msec) : 2=1.43%, 4=2.34%, 10=19.92%, 20=44.53%, 50=25.91% lat (msec) : 100=1.04% cpu : usr=0.09%, sys=30.91%, ctx=2660, 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=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=158283: Sun Jan 11 06:03:50 2026 read: IOPS=32, BW=521KiB/s (533kB/s)(6032KiB/11579msec) clat (usec): min=115, max=92268, avg=15776.54, stdev=10696.67 lat (usec): min=116, max=92269, avg=15777.19, stdev=10696.68 clat percentiles (usec): | 1.00th=[ 249], 5.00th=[ 388], 10.00th=[ 537], 20.00th=[ 9765], | 30.00th=[11338], 40.00th=[12780], 50.00th=[14615], 60.00th=[16188], | 70.00th=[18482], 80.00th=[21365], 90.00th=[26084], 95.00th=[31589], | 99.00th=[56886], 99.50th=[79168], 99.90th=[91751], 99.95th=[91751], | 99.99th=[91751] bw ( KiB/s): min= 256, max= 736, per=25.27%, avg=513.27, stdev=119.47, samples=22 iops : min= 16, max= 46, avg=31.59, stdev= 7.47, samples=22 write: IOPS=33, BW=540KiB/s (553kB/s)(6256KiB/11579msec); 0 zone resets clat (usec): min=984, max=62715, avg=14259.21, stdev=10433.49 lat (usec): min=985, max=62716, avg=14260.68, stdev=10433.30 clat percentiles (usec): | 1.00th=[ 1336], 5.00th=[ 3687], 10.00th=[ 4424], 20.00th=[ 5276], | 30.00th=[ 6325], 40.00th=[ 9110], 50.00th=[12125], 60.00th=[14746], | 70.00th=[17695], 80.00th=[21103], 90.00th=[27657], 95.00th=[34866], | 99.00th=[49546], 99.50th=[61604], 99.90th=[62653], 99.95th=[62653], | 99.99th=[62653] bw ( KiB/s): min= 308, max= 894, per=25.03%, avg=534.91, stdev=147.01, samples=22 iops : min= 19, max= 55, avg=32.95, stdev= 9.21, samples=22 lat (usec) : 250=0.52%, 500=4.04%, 750=0.91%, 1000=0.13% lat (msec) : 2=0.91%, 4=2.21%, 10=23.31%, 20=44.27%, 50=22.79% lat (msec) : 100=0.91% cpu : usr=0.10%, sys=31.47%, ctx=2513, 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=2032KiB/s (2081kB/s), 489KiB/s-531KiB/s (500kB/s-543kB/s), io=23.4MiB (24.5MB), run=11168-11788msec WRITE: bw=2138KiB/s (2189kB/s), 512KiB/s-570KiB/s (524kB/s-584kB/s), io=24.6MiB (25.8MB), run=11168-11788msec rand-rw: (groupid=0, jobs=1): err= 0: pid=158275: Sun Jan 11 06:03:56 2026 read: IOPS=20, BW=325KiB/s (333kB/s)(5920KiB/18190msec) clat (usec): min=2930, max=80781, avg=13282.37, stdev=12995.55 lat (usec): min=2930, max=80782, avg=13283.01, stdev=12995.48 clat percentiles (usec): | 1.00th=[ 3097], 5.00th=[ 3589], 10.00th=[ 3916], 20.00th=[ 4686], | 30.00th=[ 5538], 40.00th=[ 6390], 50.00th=[ 8717], 60.00th=[10945], | 70.00th=[13304], 80.00th=[19006], 90.00th=[27657], 95.00th=[40109], | 99.00th=[63177], 99.50th=[77071], 99.90th=[81265], 99.95th=[81265], | 99.99th=[81265] bw ( KiB/s): min= 96, max= 608, per=24.71%, avg=324.50, stdev=146.59, samples=36 iops : min= 6, max= 38, avg=19.94, stdev= 9.30, samples=36 write: IOPS=21, BW=350KiB/s (358kB/s)(6368KiB/18190msec); 0 zone resets clat (msec): min=13, max=129, avg=33.30, stdev=15.18 lat (msec): min=13, max=129, avg=33.31, stdev=15.18 clat percentiles (msec): | 1.00th=[ 15], 5.00th=[ 18], 10.00th=[ 20], 20.00th=[ 22], | 30.00th=[ 24], 40.00th=[ 27], 50.00th=[ 29], 60.00th=[ 33], | 70.00th=[ 36], 80.00th=[ 42], 90.00th=[ 56], 95.00th=[ 63], | 99.00th=[ 85], 99.50th=[ 110], 99.90th=[ 130], 99.95th=[ 130], | 99.99th=[ 130] bw ( KiB/s): min= 160, max= 608, per=25.37%, avg=350.58, stdev=145.57, samples=36 iops : min= 10, max= 38, avg=21.58, stdev= 9.34, samples=36 lat (msec) : 4=4.82%, 10=21.48%, 20=18.49%, 50=46.61%, 100=8.33% lat (msec) : 250=0.26% cpu : usr=0.05%, sys=9.40%, ctx=1508, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=158276: Sun Jan 11 06:03:56 2026 read: IOPS=19, BW=315KiB/s (323kB/s)(5744KiB/18233msec) clat (usec): min=2883, max=93069, avg=13692.28, stdev=13698.01 lat (usec): min=2884, max=93069, avg=13693.01, stdev=13698.19 clat percentiles (usec): | 1.00th=[ 3228], 5.00th=[ 3785], 10.00th=[ 4178], 20.00th=[ 4883], | 30.00th=[ 5735], 40.00th=[ 6718], 50.00th=[ 8094], 60.00th=[10683], | 70.00th=[13042], 80.00th=[20317], 90.00th=[32113], 95.00th=[44827], | 99.00th=[66847], 99.50th=[84411], 99.90th=[92799], 99.95th=[92799], | 99.99th=[92799] bw ( KiB/s): min= 32, max= 736, per=23.91%, avg=314.00, stdev=173.93, samples=36 iops : min= 2, max= 46, avg=19.28, stdev=11.03, samples=36 write: IOPS=22, BW=359KiB/s (368kB/s)(6544KiB/18233msec); 0 zone resets clat (msec): min=14, max=110, avg=32.46, stdev=14.85 lat (msec): min=14, max=110, avg=32.46, stdev=14.85 clat percentiles (msec): | 1.00th=[ 16], 5.00th=[ 18], 10.00th=[ 20], 20.00th=[ 22], | 30.00th=[ 24], 40.00th=[ 26], 50.00th=[ 29], 60.00th=[ 32], | 70.00th=[ 35], 80.00th=[ 40], 90.00th=[ 53], 95.00th=[ 64], | 99.00th=[ 90], 99.50th=[ 95], 99.90th=[ 111], 99.95th=[ 111], | 99.99th=[ 111] bw ( KiB/s): min= 128, max= 640, per=25.84%, avg=357.06, stdev=143.13, samples=36 iops : min= 8, max= 40, avg=21.97, stdev= 9.18, samples=36 lat (msec) : 4=3.39%, 10=24.35%, 20=16.41%, 50=48.83%, 100=6.77% lat (msec) : 250=0.26% cpu : usr=0.08%, sys=9.55%, ctx=1498, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=359,409,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=158277: Sun Jan 11 06:03:56 2026 read: IOPS=21, BW=350KiB/s (358kB/s)(6256KiB/17874msec) clat (msec): min=2, max=129, avg=13.26, stdev=13.72 lat (msec): min=2, max=129, avg=13.26, stdev=13.72 clat percentiles (msec): | 1.00th=[ 4], 5.00th=[ 4], 10.00th=[ 5], 20.00th=[ 5], | 30.00th=[ 6], 40.00th=[ 7], 50.00th=[ 8], 60.00th=[ 10], | 70.00th=[ 13], 80.00th=[ 19], 90.00th=[ 30], 95.00th=[ 42], | 99.00th=[ 61], 99.50th=[ 74], 99.90th=[ 130], 99.95th=[ 130], | 99.99th=[ 130] bw ( KiB/s): min= 95, max= 992, per=26.95%, avg=353.86, stdev=201.13, samples=35 iops : min= 5, max= 62, avg=21.77, stdev=12.74, samples=35 write: IOPS=21, BW=337KiB/s (346kB/s)(6032KiB/17874msec); 0 zone resets clat (msec): min=15, max=107, avg=33.54, stdev=14.86 lat (msec): min=15, max=107, avg=33.54, stdev=14.86 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 20], 10.00th=[ 22], 20.00th=[ 24], | 30.00th=[ 25], 40.00th=[ 27], 50.00th=[ 29], 60.00th=[ 32], | 70.00th=[ 36], 80.00th=[ 41], 90.00th=[ 53], 95.00th=[ 65], | 99.00th=[ 91], 99.50th=[ 101], 99.90th=[ 108], 99.95th=[ 108], | 99.99th=[ 108] bw ( KiB/s): min= 159, max= 608, per=24.25%, avg=335.20, stdev=125.59, samples=35 iops : min= 9, max= 38, avg=20.60, stdev= 8.07, samples=35 lat (msec) : 4=4.69%, 10=25.91%, 20=13.54%, 50=48.18%, 100=7.42% lat (msec) : 250=0.26% cpu : usr=0.08%, sys=9.56%, ctx=1455, 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=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=158278: Sun Jan 11 06:03:56 2026 read: IOPS=20, BW=335KiB/s (343kB/s)(6032KiB/17999msec) clat (usec): min=2946, max=79296, avg=13522.29, stdev=12937.13 lat (usec): min=2947, max=79297, avg=13522.88, stdev=12937.09 clat percentiles (usec): | 1.00th=[ 3228], 5.00th=[ 3556], 10.00th=[ 3916], 20.00th=[ 4686], | 30.00th=[ 5538], 40.00th=[ 6915], 50.00th=[ 8848], 60.00th=[11076], | 70.00th=[14091], 80.00th=[19006], 90.00th=[30540], 95.00th=[42206], | 99.00th=[67634], 99.50th=[78119], 99.90th=[79168], 99.95th=[79168], | 99.99th=[79168] bw ( KiB/s): min= 127, max= 704, per=24.96%, avg=327.71, stdev=141.65, samples=35 iops : min= 7, max= 44, avg=20.14, stdev= 9.01, samples=35 write: IOPS=21, BW=348KiB/s (356kB/s)(6256KiB/17999msec); 0 zone resets clat (msec): min=14, max=130, avg=32.90, stdev=14.46 lat (msec): min=14, max=130, avg=32.90, stdev=14.46 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 20], 10.00th=[ 21], 20.00th=[ 23], | 30.00th=[ 25], 40.00th=[ 27], 50.00th=[ 30], 60.00th=[ 32], | 70.00th=[ 35], 80.00th=[ 40], 90.00th=[ 51], 95.00th=[ 62], | 99.00th=[ 93], 99.50th=[ 101], 99.90th=[ 131], 99.95th=[ 131], | 99.99th=[ 131] bw ( KiB/s): min= 160, max= 576, per=24.94%, avg=344.71, stdev=131.38, samples=35 iops : min= 10, max= 36, avg=21.20, stdev= 8.43, samples=35 lat (msec) : 4=5.21%, 10=21.74%, 20=16.93%, 50=49.35%, 100=6.51% lat (msec) : 250=0.26% cpu : usr=0.04%, sys=9.78%, ctx=1466, 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=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=1314KiB/s (1345kB/s), 315KiB/s-350KiB/s (323kB/s-358kB/s), io=23.4MiB (24.5MB), run=17874-18233msec WRITE: bw=1382KiB/s (1415kB/s), 337KiB/s-359KiB/s (346kB/s-368kB/s), io=24.6MiB (25.8MB), run=17874-18233msec 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=158291: Sun Jan 11 06:04:06 2026 read: IOPS=2, BW=2283KiB/s (2338kB/s)(7168KiB/3140msec) clat (msec): min=49, max=372, avg=151.76, stdev=107.95 lat (msec): min=49, max=372, avg=151.76, stdev=107.95 clat percentiles (msec): | 1.00th=[ 50], 5.00th=[ 50], 10.00th=[ 50], 20.00th=[ 82], | 30.00th=[ 97], 40.00th=[ 97], 50.00th=[ 122], 60.00th=[ 150], | 70.00th=[ 150], 80.00th=[ 192], 90.00th=[ 372], 95.00th=[ 372], | 99.00th=[ 372], 99.50th=[ 372], 99.90th=[ 372], 99.95th=[ 372], | 99.99th=[ 372] bw ( KiB/s): min= 4047, max= 4640, per=99.55%, avg=4343.50, stdev=419.31, samples=2 iops : min= 3, max= 4, avg= 3.50, stdev= 0.71, samples=2 write: IOPS=1, BW=1631KiB/s (1670kB/s)(5120KiB/3140msec); 0 zone resets clat (msec): min=185, max=798, avg=412.74, stdev=267.75 lat (msec): min=185, max=798, avg=412.81, stdev=267.77 clat percentiles (msec): | 1.00th=[ 186], 5.00th=[ 186], 10.00th=[ 186], 20.00th=[ 186], | 30.00th=[ 222], 40.00th=[ 222], 50.00th=[ 275], 60.00th=[ 275], | 70.00th=[ 584], 80.00th=[ 584], 90.00th=[ 802], 95.00th=[ 802], | 99.00th=[ 802], 99.50th=[ 802], 99.90th=[ 802], 99.95th=[ 802], | 99.99th=[ 802] bw ( KiB/s): min= 2023, max= 4087, per=44.40%, avg=2712.33, stdev=1190.50, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 lat (msec) : 50=8.33%, 100=16.67%, 250=41.67%, 500=16.67%, 750=8.33% lat (msec) : 1000=8.33% cpu : usr=0.00%, sys=17.52%, ctx=143, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=7,5,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=158292: Sun Jan 11 06:04:06 2026 read: IOPS=0, BW=447KiB/s (458kB/s)(2048KiB/4578msec) clat (msec): min=62, max=375, avg=219.04, stdev=220.79 lat (msec): min=62, max=375, avg=219.04, stdev=220.79 clat percentiles (msec): | 1.00th=[ 63], 5.00th=[ 63], 10.00th=[ 63], 20.00th=[ 63], | 30.00th=[ 63], 40.00th=[ 63], 50.00th=[ 63], 60.00th=[ 376], | 70.00th=[ 376], 80.00th=[ 376], 90.00th=[ 376], 95.00th=[ 376], | 99.00th=[ 376], 99.50th=[ 376], 99.90th=[ 376], 99.95th=[ 376], | 99.99th=[ 376] bw ( KiB/s): min= 1539, max= 2043, per=41.05%, avg=1791.00, stdev=356.38, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=2, BW=2237KiB/s (2290kB/s)(10.0MiB/4578msec); 0 zone resets clat (msec): min=130, max=706, avg=410.29, stdev=233.22 lat (msec): min=130, max=707, avg=410.36, stdev=233.23 clat percentiles (msec): | 1.00th=[ 131], 5.00th=[ 131], 10.00th=[ 131], 20.00th=[ 163], | 30.00th=[ 169], 40.00th=[ 259], 50.00th=[ 288], 60.00th=[ 468], | 70.00th=[ 609], 80.00th=[ 651], 90.00th=[ 659], 95.00th=[ 709], | 99.00th=[ 709], 99.50th=[ 709], 99.90th=[ 709], 99.95th=[ 709], | 99.99th=[ 709] bw ( KiB/s): min= 2043, max= 4096, per=53.30%, avg=3256.20, stdev=1105.40, samples=5 iops : min= 1, max= 4, avg= 2.60, stdev= 1.14, samples=5 lat (msec) : 100=8.33%, 250=25.00%, 500=33.33%, 750=33.33% cpu : usr=0.00%, sys=20.41%, ctx=188, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=2,10,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=158293: Sun Jan 11 06:04:06 2026 read: IOPS=1, BW=1309KiB/s (1341kB/s)(6144KiB/4693msec) clat (msec): min=77, max=933, avg=279.86, stdev=325.64 lat (msec): min=77, max=933, avg=279.86, stdev=325.64 clat percentiles (msec): | 1.00th=[ 78], 5.00th=[ 78], 10.00th=[ 78], 20.00th=[ 114], | 30.00th=[ 114], 40.00th=[ 142], 50.00th=[ 142], 60.00th=[ 159], | 70.00th=[ 255], 80.00th=[ 255], 90.00th=[ 936], 95.00th=[ 936], | 99.00th=[ 936], 99.50th=[ 936], 99.90th=[ 936], 99.95th=[ 936], | 99.99th=[ 936] bw ( KiB/s): min= 2048, max= 4096, per=77.92%, avg=3399.67, stdev=1170.76, samples=3 iops : min= 2, max= 4, avg= 3.00, stdev= 1.00, samples=3 write: IOPS=1, BW=1309KiB/s (1341kB/s)(6144KiB/4693msec); 0 zone resets clat (msec): min=132, max=1028, avg=491.34, stdev=335.46 lat (msec): min=132, max=1028, avg=491.41, stdev=335.45 clat percentiles (msec): | 1.00th=[ 132], 5.00th=[ 132], 10.00th=[ 132], 20.00th=[ 184], | 30.00th=[ 184], 40.00th=[ 414], 50.00th=[ 414], 60.00th=[ 493], | 70.00th=[ 701], 80.00th=[ 701], 90.00th=[ 1028], 95.00th=[ 1028], | 99.00th=[ 1028], 99.50th=[ 1028], 99.90th=[ 1028], 99.95th=[ 1028], | 99.99th=[ 1028] bw ( KiB/s): min= 1539, max= 2048, per=32.01%, avg=1955.50, stdev=204.36, samples=6 iops : min= 1, max= 2, avg= 1.50, stdev= 0.55, samples=6 lat (msec) : 100=8.33%, 250=41.67%, 500=25.00%, 750=8.33%, 1000=8.33% lat (msec) : 2000=8.33% cpu : usr=0.00%, sys=17.22%, ctx=168, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=6,6,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=158294: Sun Jan 11 06:04:06 2026 read: IOPS=1, BW=1611KiB/s (1650kB/s)(5120KiB/3178msec) clat (msec): min=95, max=402, avg=245.71, stdev=129.30 lat (msec): min=95, max=402, avg=245.71, stdev=129.30 clat percentiles (msec): | 1.00th=[ 96], 5.00th=[ 96], 10.00th=[ 96], 20.00th=[ 96], | 30.00th=[ 130], 40.00th=[ 130], 50.00th=[ 292], 60.00th=[ 292], | 70.00th=[ 309], 80.00th=[ 309], 90.00th=[ 401], 95.00th=[ 401], | 99.00th=[ 401], 99.50th=[ 401], 99.90th=[ 401], 99.95th=[ 401], | 99.99th=[ 401] bw ( KiB/s): min= 2027, max= 4096, per=62.39%, avg=2722.00, stdev=1189.95, samples=3 iops : min= 1, max= 4, avg= 2.00, stdev= 1.73, samples=3 write: IOPS=2, BW=2256KiB/s (2310kB/s)(7168KiB/3178msec); 0 zone resets clat (msec): min=89, max=639, avg=274.50, stdev=199.21 lat (msec): min=89, max=639, avg=274.59, stdev=199.22 clat percentiles (msec): | 1.00th=[ 90], 5.00th=[ 90], 10.00th=[ 90], 20.00th=[ 127], | 30.00th=[ 128], 40.00th=[ 128], 50.00th=[ 194], 60.00th=[ 347], | 70.00th=[ 347], 80.00th=[ 401], 90.00th=[ 642], 95.00th=[ 642], | 99.00th=[ 642], 99.50th=[ 642], 99.90th=[ 642], 99.95th=[ 642], | 99.99th=[ 642] bw ( KiB/s): min= 1546, max= 6144, per=56.41%, avg=3446.25, stdev=2098.00, samples=4 iops : min= 1, max= 6, avg= 3.00, stdev= 2.16, samples=4 lat (msec) : 100=16.67%, 250=33.33%, 500=41.67%, 750=8.33% cpu : usr=0.06%, sys=17.85%, ctx=352, 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=4364KiB/s (4469kB/s), 447KiB/s-2283KiB/s (458kB/s-2338kB/s), io=20.0MiB (20.0MB), run=3140-4693msec WRITE: bw=6110KiB/s (6256kB/s), 1309KiB/s-2256KiB/s (1341kB/s-2310kB/s), io=28.0MiB (29.4MB), run=3140-4693msec rand-rw: (groupid=0, jobs=1): err= 0: pid=158296: Sun Jan 11 06:04:06 2026 read: IOPS=1, BW=1776KiB/s (1819kB/s)(7168KiB/4036msec) clat (usec): min=908, max=576901, avg=317595.25, stdev=181737.03 lat (usec): min=909, max=576901, avg=317596.64, stdev=181736.69 clat percentiles (usec): | 1.00th=[ 906], 5.00th=[ 906], 10.00th=[ 906], 20.00th=[217056], | 30.00th=[295699], 40.00th=[295699], 50.00th=[299893], 60.00th=[417334], | 70.00th=[417334], 80.00th=[417334], 90.00th=[574620], 95.00th=[574620], | 99.00th=[574620], 99.50th=[574620], 99.90th=[574620], 99.95th=[574620], | 99.99th=[574620] bw ( KiB/s): min= 1984, max= 3567, per=54.38%, avg=2411.75, stdev=770.76, samples=4 iops : min= 1, max= 3, avg= 2.00, stdev= 0.82, samples=4 write: IOPS=1, BW=1269KiB/s (1299kB/s)(5120KiB/4036msec); 0 zone resets clat (msec): min=243, max=559, avg=351.39, stdev=134.56 lat (msec): min=243, max=560, avg=351.47, stdev=134.58 clat percentiles (msec): | 1.00th=[ 245], 5.00th=[ 245], 10.00th=[ 245], 20.00th=[ 245], | 30.00th=[ 245], 40.00th=[ 245], 50.00th=[ 300], 60.00th=[ 300], | 70.00th=[ 409], 80.00th=[ 409], 90.00th=[ 558], 95.00th=[ 558], | 99.00th=[ 558], 99.50th=[ 558], 99.90th=[ 558], 99.95th=[ 558], | 99.99th=[ 558] bw ( KiB/s): min= 2048, max= 4039, per=43.67%, avg=2711.67, stdev=1149.50, samples=3 iops : min= 2, max= 3, avg= 2.33, stdev= 0.58, samples=3 lat (usec) : 1000=8.33% lat (msec) : 250=25.00%, 500=50.00%, 750=16.67% cpu : usr=0.00%, sys=46.15%, ctx=1244, 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=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=158297: Sun Jan 11 06:04:06 2026 read: IOPS=0, BW=444KiB/s (454kB/s)(2048KiB/4617msec) clat (usec): min=1292, max=242530, avg=121911.52, stdev=170581.23 lat (usec): min=1293, max=242533, avg=121913.88, stdev=170582.32 clat percentiles (usec): | 1.00th=[ 1287], 5.00th=[ 1287], 10.00th=[ 1287], 20.00th=[ 1287], | 30.00th=[ 1287], 40.00th=[ 1287], 50.00th=[ 1287], 60.00th=[242222], | 70.00th=[242222], 80.00th=[242222], 90.00th=[242222], 95.00th=[242222], | 99.00th=[242222], 99.50th=[242222], 99.90th=[242222], 99.95th=[242222], | 99.99th=[242222] bw ( KiB/s): min= 1818, max= 2048, per=43.59%, avg=1933.00, stdev=162.63, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 write: IOPS=2, BW=2218KiB/s (2271kB/s)(10.0MiB/4617msec); 0 zone resets clat (msec): min=106, max=930, avg=428.37, stdev=244.78 lat (msec): min=106, max=930, avg=428.43, stdev=244.76 clat percentiles (msec): | 1.00th=[ 107], 5.00th=[ 107], 10.00th=[ 107], 20.00th=[ 239], | 30.00th=[ 245], 40.00th=[ 268], 50.00th=[ 334], 60.00th=[ 401], | 70.00th=[ 558], 80.00th=[ 584], 90.00th=[ 625], 95.00th=[ 927], | 99.00th=[ 927], 99.50th=[ 927], 99.90th=[ 927], 99.95th=[ 927], | 99.99th=[ 927] bw ( KiB/s): min= 1984, max= 4096, per=42.19%, avg=2619.86, stdev=1008.66, samples=7 iops : min= 1, max= 4, avg= 2.29, stdev= 1.25, samples=7 lat (msec) : 2=8.33%, 250=33.33%, 500=25.00%, 750=25.00%, 1000=8.33% cpu : usr=0.00%, sys=44.71%, ctx=285, 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=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=158298: Sun Jan 11 06:04:06 2026 read: IOPS=1, BW=1470KiB/s (1505kB/s)(6144KiB/4180msec) clat (usec): min=1321, max=359496, avg=220405.28, stdev=120974.98 lat (usec): min=1323, max=359497, avg=220410.57, stdev=120974.45 clat percentiles (usec): | 1.00th=[ 1319], 5.00th=[ 1319], 10.00th=[ 1319], 20.00th=[204473], | 30.00th=[204473], 40.00th=[212861], 50.00th=[212861], 60.00th=[267387], | 70.00th=[278922], 80.00th=[278922], 90.00th=[358613], 95.00th=[358613], | 99.00th=[358613], 99.50th=[358613], 99.90th=[358613], 99.95th=[358613], | 99.99th=[358613] bw ( KiB/s): min= 2048, max= 4096, per=76.54%, avg=3394.33, stdev=1166.31, samples=3 iops : min= 2, max= 4, avg= 3.00, stdev= 1.00, samples=3 write: IOPS=1, BW=1470KiB/s (1505kB/s)(6144KiB/4180msec); 0 zone resets clat (msec): min=179, max=1034, avg=462.22, stdev=293.51 lat (msec): min=179, max=1034, avg=462.28, stdev=293.52 clat percentiles (msec): | 1.00th=[ 180], 5.00th=[ 180], 10.00th=[ 180], 20.00th=[ 355], | 30.00th=[ 355], 40.00th=[ 388], 50.00th=[ 388], 60.00th=[ 405], | 70.00th=[ 414], 80.00th=[ 414], 90.00th=[ 1036], 95.00th=[ 1036], | 99.00th=[ 1036], 99.50th=[ 1036], 99.90th=[ 1036], 99.95th=[ 1036], | 99.99th=[ 1036] bw ( KiB/s): min= 1771, max= 2048, per=31.79%, avg=1974.00, stdev=116.50, samples=5 iops : min= 1, max= 2, avg= 1.40, stdev= 0.55, samples=5 lat (msec) : 2=8.33%, 250=25.00%, 500=58.33%, 2000=8.33% cpu : usr=0.02%, sys=35.39%, ctx=778, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=6,6,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=158299: Sun Jan 11 06:04:06 2026 read: IOPS=1, BW=1264KiB/s (1294kB/s)(5120KiB/4051msec) clat (usec): min=950, max=386863, avg=143581.30, stdev=161994.02 lat (usec): min=950, max=386864, avg=143582.36, stdev=161994.24 clat percentiles (usec): | 1.00th=[ 947], 5.00th=[ 947], 10.00th=[ 947], 20.00th=[ 947], | 30.00th=[ 1045], 40.00th=[ 1045], 50.00th=[117965], 60.00th=[117965], | 70.00th=[210764], 80.00th=[210764], 90.00th=[387974], 95.00th=[387974], | 99.00th=[387974], 99.50th=[387974], 99.90th=[387974], 99.95th=[387974], | 99.99th=[387974] bw ( KiB/s): min= 2048, max= 6144, per=92.36%, avg=4096.00, stdev=2896.31, samples=2 iops : min= 2, max= 6, avg= 4.00, stdev= 2.83, samples=2 write: IOPS=1, BW=1769KiB/s (1812kB/s)(7168KiB/4051msec); 0 zone resets clat (msec): min=298, max=1017, avg=471.72, stdev=259.35 lat (msec): min=298, max=1017, avg=471.80, stdev=259.35 clat percentiles (msec): | 1.00th=[ 300], 5.00th=[ 300], 10.00th=[ 300], 20.00th=[ 321], | 30.00th=[ 330], 40.00th=[ 330], 50.00th=[ 338], 60.00th=[ 418], | 70.00th=[ 418], 80.00th=[ 584], 90.00th=[ 1020], 95.00th=[ 1020], | 99.00th=[ 1020], 99.50th=[ 1020], 99.90th=[ 1020], 99.95th=[ 1020], | 99.99th=[ 1020] bw ( KiB/s): min= 1756, max= 2048, per=31.74%, avg=1971.00, stdev=123.04, samples=5 iops : min= 1, max= 2, avg= 1.40, stdev= 0.55, samples=5 lat (usec) : 1000=8.33% lat (msec) : 2=8.33%, 250=16.67%, 500=50.00%, 750=8.33%, 2000=8.33% cpu : usr=0.05%, sys=41.58%, ctx=291, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=5,7,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=4436KiB/s (4542kB/s), 444KiB/s-1776KiB/s (454kB/s-1819kB/s), io=20.0MiB (20.0MB), run=4036-4617msec WRITE: bw=6210KiB/s (6359kB/s), 1269KiB/s-2218KiB/s (1299kB/s-2271kB/s), io=28.0MiB (29.4MB), run=4036-4617msec 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=158310: Sun Jan 11 06:04:16 2026 read: IOPS=1, BW=5483KiB/s (5615kB/s)(12.0MiB/2241msec) clat (msec): min=450, max=1258, avg=740.28, stdev=449.89 lat (msec): min=450, max=1258, avg=740.28, stdev=449.89 clat percentiles (msec): | 1.00th=[ 451], 5.00th=[ 451], 10.00th=[ 451], 20.00th=[ 451], | 30.00th=[ 451], 40.00th=[ 510], 50.00th=[ 510], 60.00th=[ 510], | 70.00th=[ 1267], 80.00th=[ 1267], 90.00th=[ 1267], 95.00th=[ 1267], | 99.00th=[ 1267], 99.50th=[ 1267], 99.90th=[ 1267], 99.95th=[ 1267], | 99.99th=[ 1267] bw ( KiB/s): min= 7876, max= 8192, per=100.00%, avg=8034.00, stdev=223.45, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 500=33.33%, 750=33.33%, 2000=33.33% cpu : usr=0.00%, sys=44.82%, ctx=3094, majf=0, minf=8 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=3,0,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=158311: Sun Jan 11 06:04:16 2026 read: IOPS=0, BW=1629KiB/s (1668kB/s)(4096KiB/2514msec) clat (nsec): min=494456k, max=494456k, avg=494456237.00, stdev= 0.00 lat (nsec): min=494458k, max=494458k, avg=494458277.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 493], 5.00th=[ 493], 10.00th=[ 493], 20.00th=[ 493], | 30.00th=[ 493], 40.00th=[ 493], 50.00th=[ 493], 60.00th=[ 493], | 70.00th=[ 493], 80.00th=[ 493], 90.00th=[ 493], 95.00th=[ 493], | 99.00th=[ 493], 99.50th=[ 493], 99.90th=[ 493], 99.95th=[ 493], | 99.99th=[ 493] 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 write: IOPS=0, BW=3259KiB/s (3337kB/s)(8192KiB/2514msec); 0 zone resets clat (msec): min=967, max=991, avg=979.85, stdev=17.08 lat (msec): min=968, max=992, avg=980.10, stdev=17.09 clat percentiles (msec): | 1.00th=[ 969], 5.00th=[ 969], 10.00th=[ 969], 20.00th=[ 969], | 30.00th=[ 969], 40.00th=[ 969], 50.00th=[ 969], 60.00th=[ 995], | 70.00th=[ 995], 80.00th=[ 995], 90.00th=[ 995], 95.00th=[ 995], | 99.00th=[ 995], 99.50th=[ 995], 99.90th=[ 995], 99.95th=[ 995], | 99.99th=[ 995] bw ( KiB/s): min= 8000, max= 8000, per=70.73%, avg=8000.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 1000=66.67% cpu : usr=0.00%, sys=25.19%, ctx=768, 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=158312: Sun Jan 11 06:04:16 2026 write: IOPS=1, BW=4242KiB/s (4343kB/s)(12.0MiB/2897msec); 0 zone resets clat (msec): min=208, max=2082, avg=958.34, stdev=991.24 lat (msec): min=208, max=2082, avg=958.63, stdev=991.21 clat percentiles (msec): | 1.00th=[ 209], 5.00th=[ 209], 10.00th=[ 209], 20.00th=[ 209], | 30.00th=[ 209], 40.00th=[ 584], 50.00th=[ 584], 60.00th=[ 584], | 70.00th=[ 2089], 80.00th=[ 2089], 90.00th=[ 2089], 95.00th=[ 2089], | 99.00th=[ 2089], 99.50th=[ 2089], 99.90th=[ 2089], 99.95th=[ 2089], | 99.99th=[ 2089] bw ( KiB/s): min= 8192, max= 8192, per=72.43%, avg=8192.00, stdev= 0.00, samples=2 iops : min= 2, max= 2, avg= 2.00, stdev= 0.00, samples=2 lat (msec) : 250=33.33%, 750=33.33%, >=2000=33.33% cpu : usr=0.03%, sys=13.12%, ctx=56, 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=158313: Sun Jan 11 06:04:16 2026 write: IOPS=1, BW=4521KiB/s (4629kB/s)(12.0MiB/2718msec); 0 zone resets clat (msec): min=508, max=1157, avg=899.97, stdev=344.89 lat (msec): min=508, max=1158, avg=900.20, stdev=344.85 clat percentiles (msec): | 1.00th=[ 510], 5.00th=[ 510], 10.00th=[ 510], 20.00th=[ 510], | 30.00th=[ 510], 40.00th=[ 1036], 50.00th=[ 1036], 60.00th=[ 1036], | 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= 7876, max= 8175, per=70.95%, avg=8025.50, stdev=211.42, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=33.33%, 2000=66.67% cpu : usr=0.00%, sys=11.52%, ctx=58, majf=0, minf=9 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=6517KiB/s (6674kB/s), 1629KiB/s-5483KiB/s (1668kB/s-5615kB/s), io=16.0MiB (16.8MB), run=2241-2514msec WRITE: bw=11.0MiB/s (11.6MB/s), 3259KiB/s-4521KiB/s (3337kB/s-4629kB/s), io=32.0MiB (33.6MB), run=2514-2897msec rand-rw: (groupid=0, jobs=1): err= 0: pid=158305: Sun Jan 11 06:04:17 2026 read: IOPS=1, BW=4859KiB/s (4975kB/s)(12.0MiB/2529msec) clat (msec): min=362, max=1411, avg=801.42, stdev=545.41 lat (msec): min=362, max=1411, avg=801.42, stdev=545.41 clat percentiles (msec): | 1.00th=[ 363], 5.00th=[ 363], 10.00th=[ 363], 20.00th=[ 363], | 30.00th=[ 363], 40.00th=[ 634], 50.00th=[ 634], 60.00th=[ 634], | 70.00th=[ 1418], 80.00th=[ 1418], 90.00th=[ 1418], 95.00th=[ 1418], | 99.00th=[ 1418], 99.50th=[ 1418], 99.90th=[ 1418], 99.95th=[ 1418], | 99.99th=[ 1418] bw ( KiB/s): min= 8175, max= 8175, per=100.00%, avg=8175.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 750=33.33%, 2000=33.33% cpu : usr=0.00%, sys=14.99%, ctx=118, majf=0, minf=7 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=158306: Sun Jan 11 06:04:17 2026 read: IOPS=0, BW=1368KiB/s (1400kB/s)(4096KiB/2995msec) clat (nsec): min=1613.3M, max=1613.3M, avg=1613290541.00, stdev= 0.00 lat (nsec): min=1613.3M, max=1613.3M, avg=1613291497.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1620], 5.00th=[ 1620], 10.00th=[ 1620], 20.00th=[ 1620], | 30.00th=[ 1620], 40.00th=[ 1620], 50.00th=[ 1620], 60.00th=[ 1620], | 70.00th=[ 1620], 80.00th=[ 1620], 90.00th=[ 1620], 95.00th=[ 1620], | 99.00th=[ 1620], 99.50th=[ 1620], 99.90th=[ 1620], 99.95th=[ 1620], | 99.99th=[ 1620] 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 write: IOPS=0, BW=2735KiB/s (2801kB/s)(8192KiB/2995msec); 0 zone resets clat (msec): min=489, max=795, avg=642.46, stdev=216.47 lat (msec): min=489, max=795, avg=642.73, stdev=216.44 clat percentiles (msec): | 1.00th=[ 489], 5.00th=[ 489], 10.00th=[ 489], 20.00th=[ 489], | 30.00th=[ 489], 40.00th=[ 489], 50.00th=[ 489], 60.00th=[ 793], | 70.00th=[ 793], 80.00th=[ 793], 90.00th=[ 793], 95.00th=[ 793], | 99.00th=[ 793], 99.50th=[ 793], 99.90th=[ 793], 99.95th=[ 793], | 99.99th=[ 793] bw ( KiB/s): min= 8175, max= 8175, per=79.81%, avg=8175.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=12.56%, ctx=85, 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=158308: Sun Jan 11 06:04:17 2026 write: IOPS=0, BW=3841KiB/s (3933kB/s)(12.0MiB/3199msec); 0 zone resets clat (msec): min=105, max=2522, avg=1025.51, stdev=1307.94 lat (msec): min=105, max=2523, avg=1025.90, stdev=1307.88 clat percentiles (msec): | 1.00th=[ 106], 5.00th=[ 106], 10.00th=[ 106], 20.00th=[ 106], | 30.00th=[ 106], 40.00th=[ 447], 50.00th=[ 447], 60.00th=[ 447], | 70.00th=[ 2534], 80.00th=[ 2534], 90.00th=[ 2534], 95.00th=[ 2534], | 99.00th=[ 2534], 99.50th=[ 2534], 99.90th=[ 2534], 99.95th=[ 2534], | 99.99th=[ 2534] bw ( KiB/s): min= 8192, max= 8192, per=79.98%, avg=8192.00, stdev= 0.00, samples=1 iops : min= 2, max= 2, avg= 2.00, stdev= 0.00, samples=1 lat (msec) : 250=33.33%, 500=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=12.54%, ctx=84, majf=0, minf=7 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=158309: Sun Jan 11 06:04:17 2026 write: IOPS=1, BW=4791KiB/s (4906kB/s)(12.0MiB/2565msec); 0 zone resets clat (msec): min=160, max=2111, avg=816.05, stdev=1121.91 lat (msec): min=160, max=2111, avg=816.35, stdev=1121.93 clat percentiles (msec): | 1.00th=[ 161], 5.00th=[ 161], 10.00th=[ 161], 20.00th=[ 161], | 30.00th=[ 161], 40.00th=[ 178], 50.00th=[ 178], 60.00th=[ 178], | 70.00th=[ 2106], 80.00th=[ 2106], 90.00th=[ 2106], 95.00th=[ 2106], | 99.00th=[ 2106], 99.50th=[ 2106], 99.90th=[ 2106], 99.95th=[ 2106], | 99.99th=[ 2106] bw ( KiB/s): min=15814, max=15814, per=100.00%, avg=15814.00, stdev= 0.00, samples=1 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=1 lat (msec) : 250=66.67%, >=2000=33.33% cpu : usr=0.04%, sys=13.53%, ctx=76, 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=5470KiB/s (5602kB/s), 1368KiB/s-4859KiB/s (1400kB/s-4975kB/s), io=16.0MiB (16.8MB), run=2529-2995msec WRITE: bw=10.0MiB/s (10.5MB/s), 2735KiB/s-4791KiB/s (2801kB/s-4906kB/s), io=32.0MiB (33.6MB), run=2565-3199msec