== sanity test 398b: DIO and buffer IO race ============== 09:50:03 (1787320203) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 5.47014 s, 9.2 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=179260: Fri Aug 21 09:52:20 2026 read: IOPS=13, BW=52.9KiB/s (54.2kB/s)(5992KiB/113304msec) clat (usec): min=41, max=912332, avg=41138.27, stdev=34188.74 lat (usec): min=42, max=912333, avg=41140.33, stdev=34188.95 clat percentiles (usec): | 1.00th=[ 56], 5.00th=[ 11076], 10.00th=[ 15795], 20.00th=[ 20579], | 30.00th=[ 25822], 40.00th=[ 30278], 50.00th=[ 35390], 60.00th=[ 40633], | 70.00th=[ 47449], 80.00th=[ 57410], 90.00th=[ 70779], 95.00th=[ 88605], | 99.00th=[139461], 99.50th=[149947], 99.90th=[206570], 99.95th=[910164], | 99.99th=[910164] bw ( KiB/s): min= 7, max= 126, per=24.92%, avg=52.58, stdev=19.53, samples=223 iops : min= 1, max= 31, avg=12.49, stdev= 4.91, samples=223 write: IOPS=13, BW=55.6KiB/s (56.9kB/s)(6296KiB/113304msec); 0 zone resets clat (usec): min=1235, max=265566, avg=32496.94, stdev=33519.79 lat (usec): min=1236, max=265567, avg=32498.61, stdev=33520.00 clat percentiles (usec): | 1.00th=[ 1319], 5.00th=[ 1631], 10.00th=[ 2507], 20.00th=[ 4555], | 30.00th=[ 7308], 40.00th=[ 14615], 50.00th=[ 23200], 60.00th=[ 31327], | 70.00th=[ 41681], 80.00th=[ 55837], 90.00th=[ 77071], 95.00th=[ 99091], | 99.00th=[145753], 99.50th=[170918], 99.90th=[212861], 99.95th=[265290], | 99.99th=[265290] bw ( KiB/s): min= 7, max= 144, per=24.97%, avg=55.19, stdev=22.47, samples=223 iops : min= 1, max= 36, avg=13.15, stdev= 5.68, samples=223 lat (usec) : 50=0.16%, 100=1.17%, 250=0.13%, 500=0.07%, 1000=0.07% lat (msec) : 2=3.61%, 4=5.37%, 10=9.44%, 20=12.47%, 50=42.25% lat (msec) : 100=21.26%, 250=3.94%, 500=0.03%, 1000=0.03% cpu : usr=0.07%, sys=5.89%, ctx=7009, 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=179261: Fri Aug 21 09:52:20 2026 read: IOPS=13, BW=52.9KiB/s (54.1kB/s)(5940KiB/112357msec) clat (usec): min=37, max=176574, avg=41632.98, stdev=25460.60 lat (usec): min=37, max=176576, avg=41634.87, stdev=25460.71 clat percentiles (usec): | 1.00th=[ 56], 5.00th=[ 12387], 10.00th=[ 16909], 20.00th=[ 22152], | 30.00th=[ 26608], 40.00th=[ 30802], 50.00th=[ 36439], 60.00th=[ 42206], | 70.00th=[ 49546], 80.00th=[ 58983], 90.00th=[ 73925], 95.00th=[ 87557], | 99.00th=[135267], 99.50th=[154141], 99.90th=[175113], 99.95th=[177210], | 99.99th=[177210] bw ( KiB/s): min= 7, max= 103, per=24.91%, avg=52.57, stdev=19.57, samples=221 iops : min= 1, max= 25, avg=12.48, stdev= 4.89, samples=221 write: IOPS=14, BW=56.5KiB/s (57.9kB/s)(6348KiB/112357msec); 0 zone resets clat (usec): min=1138, max=870238, avg=31510.98, stdev=37987.79 lat (usec): min=1138, max=870239, avg=31520.11, stdev=37989.41 clat percentiles (usec): | 1.00th=[ 1303], 5.00th=[ 1745], 10.00th=[ 2409], 20.00th=[ 4113], | 30.00th=[ 6783], 40.00th=[ 14222], 50.00th=[ 22938], 60.00th=[ 29492], | 70.00th=[ 39060], 80.00th=[ 54264], 90.00th=[ 76022], 95.00th=[ 91751], | 99.00th=[143655], 99.50th=[168821], 99.90th=[252707], 99.95th=[868221], | 99.99th=[868221] bw ( KiB/s): min= 8, max= 118, per=25.38%, avg=56.09, stdev=22.69, samples=221 iops : min= 2, max= 29, avg=13.37, stdev= 5.69, samples=221 lat (usec) : 50=0.07%, 100=1.40%, 250=0.10%, 500=0.03%, 1000=0.03% lat (msec) : 2=3.61%, 4=6.32%, 10=8.59%, 20=11.23%, 50=42.61% lat (msec) : 100=22.75%, 250=3.19%, 500=0.03%, 1000=0.03% cpu : usr=0.08%, sys=5.93%, ctx=6968, 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=179262: Fri Aug 21 09:52:20 2026 read: IOPS=13, BW=53.3KiB/s (54.6kB/s)(6028KiB/113137msec) clat (usec): min=42, max=251715, avg=41381.86, stdev=26921.53 lat (usec): min=42, max=251716, avg=41423.61, stdev=27046.08 clat percentiles (usec): | 1.00th=[ 55], 5.00th=[ 12256], 10.00th=[ 16581], 20.00th=[ 21365], | 30.00th=[ 25297], 40.00th=[ 30278], 50.00th=[ 35390], 60.00th=[ 40633], | 70.00th=[ 48497], 80.00th=[ 58459], 90.00th=[ 73925], 95.00th=[ 91751], | 99.00th=[141558], 99.50th=[152044], 99.90th=[198181], 99.95th=[252707], | 99.99th=[252707] bw ( KiB/s): min= 7, max= 112, per=25.10%, avg=52.95, stdev=17.95, samples=222 iops : min= 1, max= 28, avg=12.59, stdev= 4.53, samples=222 write: IOPS=13, BW=55.3KiB/s (56.7kB/s)(6260KiB/113137msec); 0 zone resets clat (usec): min=1013, max=846602, avg=32057.26, stdev=38237.53 lat (usec): min=1014, max=846604, avg=32059.58, stdev=38237.10 clat percentiles (usec): | 1.00th=[ 1303], 5.00th=[ 1647], 10.00th=[ 2409], 20.00th=[ 4359], | 30.00th=[ 7308], 40.00th=[ 14353], 50.00th=[ 22676], 60.00th=[ 30802], | 70.00th=[ 40109], 80.00th=[ 53216], 90.00th=[ 73925], 95.00th=[ 94897], | 99.00th=[137364], 99.50th=[173016], 99.90th=[278922], 99.95th=[843056], | 99.99th=[843056] bw ( KiB/s): min= 7, max= 133, per=24.84%, avg=54.89, stdev=24.80, samples=222 iops : min= 1, max= 33, avg=13.07, stdev= 6.25, samples=222 lat (usec) : 50=0.13%, 100=1.37%, 250=0.10%, 500=0.10%, 1000=0.03% lat (msec) : 2=3.97%, 4=5.57%, 10=8.56%, 20=12.17%, 50=42.71% lat (msec) : 100=21.45%, 250=3.74%, 500=0.07%, 1000=0.03% cpu : usr=0.08%, sys=5.94%, ctx=7064, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179263: Fri Aug 21 09:52:20 2026 read: IOPS=13, BW=54.0KiB/s (55.3kB/s)(6052KiB/112058msec) clat (usec): min=36, max=209299, avg=40709.11, stdev=24760.99 lat (usec): min=36, max=209300, avg=40712.25, stdev=24761.88 clat percentiles (usec): | 1.00th=[ 54], 5.00th=[ 11863], 10.00th=[ 17171], 20.00th=[ 21627], | 30.00th=[ 26084], 40.00th=[ 30278], 50.00th=[ 35390], 60.00th=[ 41157], | 70.00th=[ 49546], 80.00th=[ 57410], 90.00th=[ 71828], 95.00th=[ 85459], | 99.00th=[120062], 99.50th=[131597], 99.90th=[185598], 99.95th=[208667], | 99.99th=[208667] bw ( KiB/s): min= 7, max= 119, per=25.44%, avg=53.67, stdev=20.08, samples=220 iops : min= 1, max= 29, avg=12.76, stdev= 5.05, samples=220 write: IOPS=13, BW=55.6KiB/s (56.0kB/s)(6236KiB/112058msec); 0 zone resets clat (usec): min=1212, max=932488, avg=32051.18, stdev=39312.08 lat (usec): min=1212, max=932490, avg=32054.35, stdev=39311.82 clat percentiles (usec): | 1.00th=[ 1336], 5.00th=[ 1729], 10.00th=[ 2409], 20.00th=[ 4293], | 30.00th=[ 7439], 40.00th=[ 14353], 50.00th=[ 22152], 60.00th=[ 30016], | 70.00th=[ 40633], 80.00th=[ 55313], 90.00th=[ 76022], 95.00th=[ 94897], | 99.00th=[141558], 99.50th=[164627], 99.90th=[244319], 99.95th=[935330], | 99.99th=[935330] bw ( KiB/s): min= 15, max= 127, per=24.95%, avg=55.15, stdev=20.96, samples=220 iops : min= 3, max= 31, avg=13.14, stdev= 5.30, samples=220 lat (usec) : 50=0.20%, 100=1.33%, 250=0.23%, 500=0.10%, 750=0.03% lat (usec) : 1000=0.03% lat (msec) : 2=3.45%, 4=5.92%, 10=8.63%, 20=11.59%, 50=42.22% lat (msec) : 100=23.24%, 250=2.99%, 1000=0.03% cpu : usr=0.08%, sys=5.94%, ctx=7010, majf=0, minf=17 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1513,1559,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=212KiB/s (217kB/s), 52.9KiB/s-54.0KiB/s (54.1kB/s-55.3kB/s), io=23.4MiB (24.6MB), run=112058-113304msec WRITE: bw=222KiB/s (227kB/s), 55.3KiB/s-56.5KiB/s (56.7kB/s-57.9kB/s), io=24.6MiB (25.7MB), run=112058-113304msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179265: Fri Aug 21 09:52:58 2026 read: IOPS=10, BW=40.2KiB/s (41.2kB/s)(5992KiB/149035msec) clat (msec): min=5, max=944, avg=39.85, stdev=42.10 lat (msec): min=5, max=944, avg=39.85, stdev=42.10 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 16], | 30.00th=[ 20], 40.00th=[ 23], 50.00th=[ 27], 60.00th=[ 33], | 70.00th=[ 42], 80.00th=[ 56], 90.00th=[ 88], 95.00th=[ 114], | 99.00th=[ 169], 99.50th=[ 184], 99.90th=[ 359], 99.95th=[ 944], | 99.99th=[ 944] bw ( KiB/s): min= 7, max= 144, per=25.32%, avg=40.25, stdev=26.28, samples=291 iops : min= 1, max= 36, avg= 9.43, stdev= 6.61, samples=291 write: IOPS=10, BW=42.2KiB/s (43.3kB/s)(6296KiB/149035msec); 0 zone resets clat (msec): min=9, max=344, avg=56.65, stdev=38.62 lat (msec): min=9, max=344, avg=56.65, stdev=38.62 clat percentiles (msec): | 1.00th=[ 16], 5.00th=[ 20], 10.00th=[ 23], 20.00th=[ 28], | 30.00th=[ 33], 40.00th=[ 38], 50.00th=[ 44], 60.00th=[ 54], | 70.00th=[ 65], 80.00th=[ 82], 90.00th=[ 109], 95.00th=[ 131], | 99.00th=[ 194], 99.50th=[ 230], 99.90th=[ 330], 99.95th=[ 347], | 99.99th=[ 347] bw ( KiB/s): min= 7, max= 118, per=25.22%, avg=42.12, stdev=24.58, samples=292 iops : min= 1, max= 29, avg= 9.90, stdev= 6.16, samples=292 lat (msec) : 10=2.73%, 20=16.05%, 50=47.46%, 100=23.80%, 250=9.77% lat (msec) : 500=0.16%, 1000=0.03% cpu : usr=0.06%, sys=2.37%, ctx=4886, 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=179266: Fri Aug 21 09:52:58 2026 read: IOPS=9, BW=39.6KiB/s (40.5kB/s)(5940KiB/150014msec) clat (msec): min=4, max=1001, avg=39.62, stdev=42.73 lat (msec): min=4, max=1001, avg=39.62, stdev=42.73 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 16], | 30.00th=[ 19], 40.00th=[ 23], 50.00th=[ 27], 60.00th=[ 32], | 70.00th=[ 39], 80.00th=[ 57], 90.00th=[ 88], 95.00th=[ 114], | 99.00th=[ 171], 99.50th=[ 197], 99.90th=[ 292], 99.95th=[ 1003], | 99.99th=[ 1003] bw ( KiB/s): min= 7, max= 151, per=25.34%, avg=40.29, stdev=26.43, samples=288 iops : min= 1, max= 37, avg= 9.44, stdev= 6.64, samples=288 write: IOPS=10, BW=42.3KiB/s (43.3kB/s)(6348KiB/150014msec); 0 zone resets clat (msec): min=11, max=338, avg=57.36, stdev=39.52 lat (msec): min=11, max=338, avg=57.37, stdev=39.52 clat percentiles (msec): | 1.00th=[ 16], 5.00th=[ 20], 10.00th=[ 23], 20.00th=[ 28], | 30.00th=[ 33], 40.00th=[ 38], 50.00th=[ 44], 60.00th=[ 54], | 70.00th=[ 67], 80.00th=[ 83], 90.00th=[ 113], 95.00th=[ 134], | 99.00th=[ 192], 99.50th=[ 211], 99.90th=[ 334], 99.95th=[ 338], | 99.99th=[ 338] bw ( KiB/s): min= 7, max= 126, per=25.17%, avg=42.04, stdev=24.93, samples=295 iops : min= 1, max= 31, avg= 9.88, stdev= 6.26, samples=295 lat (msec) : 10=2.05%, 20=16.96%, 50=47.72%, 100=22.92%, 250=10.12% lat (msec) : 500=0.20%, 2000=0.03% cpu : usr=0.06%, sys=2.44%, ctx=4947, 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=179267: Fri Aug 21 09:52:58 2026 read: IOPS=10, BW=40.2KiB/s (41.2kB/s)(6028KiB/149818msec) clat (msec): min=6, max=234, avg=39.26, stdev=33.70 lat (msec): min=6, max=234, avg=39.26, stdev=33.70 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 16], | 30.00th=[ 19], 40.00th=[ 23], 50.00th=[ 28], 60.00th=[ 34], | 70.00th=[ 42], 80.00th=[ 56], 90.00th=[ 87], 95.00th=[ 114], | 99.00th=[ 161], 99.50th=[ 174], 99.90th=[ 220], 99.95th=[ 234], | 99.99th=[ 234] bw ( KiB/s): min= 7, max= 143, per=25.36%, avg=40.33, stdev=26.35, samples=291 iops : min= 1, max= 35, avg= 9.45, stdev= 6.61, samples=291 write: IOPS=10, BW=41.8KiB/s (42.8kB/s)(6260KiB/149818msec); 0 zone resets clat (msec): min=10, max=1022, avg=57.83, stdev=45.04 lat (msec): min=10, max=1022, avg=57.84, stdev=45.04 clat percentiles (msec): | 1.00th=[ 16], 5.00th=[ 20], 10.00th=[ 23], 20.00th=[ 28], | 30.00th=[ 33], 40.00th=[ 38], 50.00th=[ 45], 60.00th=[ 54], | 70.00th=[ 66], 80.00th=[ 84], 90.00th=[ 112], 95.00th=[ 133], | 99.00th=[ 197], 99.50th=[ 220], 99.90th=[ 255], 99.95th=[ 1020], | 99.99th=[ 1020] bw ( KiB/s): min= 7, max= 118, per=24.73%, avg=41.29, stdev=24.82, samples=295 iops : min= 1, max= 29, avg= 9.68, stdev= 6.23, samples=295 lat (msec) : 10=2.21%, 20=16.80%, 50=47.43%, 100=23.21%, 250=10.29% lat (msec) : 500=0.03%, 2000=0.03% cpu : usr=0.06%, sys=2.46%, ctx=4929, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179268: Fri Aug 21 09:52:58 2026 read: IOPS=10, BW=40.3KiB/s (41.2kB/s)(6052KiB/150330msec) clat (msec): min=5, max=353, avg=38.75, stdev=34.68 lat (msec): min=5, max=353, avg=38.75, stdev=34.68 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 16], | 30.00th=[ 18], 40.00th=[ 22], 50.00th=[ 27], 60.00th=[ 33], | 70.00th=[ 41], 80.00th=[ 57], 90.00th=[ 84], 95.00th=[ 112], | 99.00th=[ 165], 99.50th=[ 176], 99.90th=[ 236], 99.95th=[ 355], | 99.99th=[ 355] bw ( KiB/s): min= 7, max= 141, per=25.49%, avg=40.53, stdev=25.92, samples=290 iops : min= 1, max= 35, avg= 9.50, stdev= 6.51, samples=290 write: IOPS=10, BW=41.5KiB/s (42.5kB/s)(6236KiB/150330msec); 0 zone resets clat (msec): min=9, max=1013, avg=58.73, stdev=46.20 lat (msec): min=9, max=1013, avg=58.73, stdev=46.21 clat percentiles (msec): | 1.00th=[ 15], 5.00th=[ 20], 10.00th=[ 24], 20.00th=[ 28], | 30.00th=[ 33], 40.00th=[ 39], 50.00th=[ 46], 60.00th=[ 55], | 70.00th=[ 67], 80.00th=[ 86], 90.00th=[ 112], 95.00th=[ 136], | 99.00th=[ 190], 99.50th=[ 236], 99.90th=[ 342], 99.95th=[ 1011], | 99.99th=[ 1011] bw ( KiB/s): min= 7, max= 119, per=24.59%, avg=41.06, stdev=23.91, samples=295 iops : min= 1, max= 29, avg= 9.63, stdev= 6.00, samples=295 lat (msec) : 10=2.47%, 20=17.74%, 50=46.03%, 100=23.50%, 250=10.09% lat (msec) : 500=0.13%, 2000=0.03% cpu : usr=0.06%, sys=2.42%, ctx=4944, 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=160KiB/s (164kB/s), 39.6KiB/s-40.3KiB/s (40.5kB/s-41.2kB/s), io=23.4MiB (24.6MB), run=149035-150330msec WRITE: bw=167KiB/s (171kB/s), 41.5KiB/s-42.3KiB/s (42.5kB/s-43.3kB/s), io=24.6MiB (25.7MB), run=149035-150330msec 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=179309: Fri Aug 21 09:53:43 2026 read: IOPS=11, BW=183KiB/s (188kB/s)(5920KiB/32294msec) clat (usec): min=41, max=301387, avg=47923.52, stdev=34569.75 lat (usec): min=41, max=301388, avg=47924.61, stdev=34569.75 clat percentiles (usec): | 1.00th=[ 54], 5.00th=[ 69], 10.00th=[ 12256], 20.00th=[ 22414], | 30.00th=[ 29230], 40.00th=[ 34866], 50.00th=[ 40633], 60.00th=[ 48497], | 70.00th=[ 56886], 80.00th=[ 71828], 90.00th=[ 89654], 95.00th=[105382], | 99.00th=[164627], 99.50th=[166724], 99.90th=[299893], 99.95th=[299893], | 99.99th=[299893] bw ( KiB/s): min= 94, max= 411, per=24.71%, avg=183.06, stdev=64.47, samples=62 iops : min= 5, max= 25, avg=10.63, stdev= 4.09, samples=62 write: IOPS=12, BW=197KiB/s (202kB/s)(6368KiB/32294msec); 0 zone resets clat (usec): min=1252, max=162943, avg=35722.09, stdev=32096.54 lat (usec): min=1253, max=162945, avg=35728.10, stdev=32098.75 clat percentiles (usec): | 1.00th=[ 1762], 5.00th=[ 2802], 10.00th=[ 4080], 20.00th=[ 6783], | 30.00th=[ 12911], 40.00th=[ 20579], 50.00th=[ 26870], 60.00th=[ 34866], | 70.00th=[ 45876], 80.00th=[ 57410], 90.00th=[ 85459], 95.00th=[103285], | 99.00th=[131597], 99.50th=[143655], 99.90th=[162530], 99.95th=[162530], | 99.99th=[162530] bw ( KiB/s): min= 30, max= 411, per=25.12%, avg=195.90, stdev=74.45, samples=63 iops : min= 1, max= 25, avg=11.44, stdev= 4.67, samples=63 lat (usec) : 50=0.26%, 100=2.86%, 250=0.78%, 500=0.26% lat (msec) : 2=1.04%, 4=4.04%, 10=9.11%, 20=9.51%, 50=39.97% lat (msec) : 100=25.91%, 250=6.12%, 500=0.13% cpu : usr=0.07%, sys=6.48%, ctx=1923, majf=0, minf=17 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=179310: Fri Aug 21 09:53:43 2026 read: IOPS=11, BW=179KiB/s (183kB/s)(5744KiB/32100msec) clat (usec): min=51, max=335644, avg=47851.32, stdev=35517.58 lat (usec): min=51, max=335645, avg=47852.39, stdev=35517.63 clat percentiles (usec): | 1.00th=[ 56], 5.00th=[ 76], 10.00th=[ 14615], 20.00th=[ 22938], | 30.00th=[ 28967], 40.00th=[ 34866], 50.00th=[ 41681], 60.00th=[ 50070], | 70.00th=[ 57934], 80.00th=[ 67634], 90.00th=[ 86508], 95.00th=[106431], | 99.00th=[154141], 99.50th=[231736], 99.90th=[337642], 99.95th=[337642], | 99.99th=[337642] bw ( KiB/s): min= 28, max= 350, per=24.01%, avg=177.89, stdev=69.36, samples=63 iops : min= 1, max= 21, avg=10.30, stdev= 4.37, samples=63 write: IOPS=12, BW=204KiB/s (209kB/s)(6544KiB/32100msec); 0 zone resets clat (usec): min=1619, max=210285, avg=35808.55, stdev=33208.62 lat (usec): min=1622, max=210287, avg=35812.70, stdev=33207.73 clat percentiles (usec): | 1.00th=[ 1844], 5.00th=[ 3097], 10.00th=[ 3884], 20.00th=[ 7046], | 30.00th=[ 12387], 40.00th=[ 18220], 50.00th=[ 27395], 60.00th=[ 34341], | 70.00th=[ 46400], 80.00th=[ 58983], 90.00th=[ 81265], 95.00th=[102237], | 99.00th=[143655], 99.50th=[158335], 99.90th=[210764], 99.95th=[210764], | 99.99th=[210764] bw ( KiB/s): min= 62, max= 512, per=26.57%, avg=207.26, stdev=92.33, samples=62 iops : min= 3, max= 32, avg=12.16, stdev= 5.83, samples=62 lat (usec) : 100=3.12%, 250=0.78%, 500=0.13%, 1000=0.13% lat (msec) : 2=1.04%, 4=4.69%, 10=8.33%, 20=11.33%, 50=37.76% lat (msec) : 100=26.17%, 250=6.38%, 500=0.13% cpu : usr=0.07%, sys=6.43%, ctx=1892, majf=0, minf=17 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=179312: Fri Aug 21 09:53:43 2026 read: IOPS=12, BW=203KiB/s (208kB/s)(6256KiB/30845msec) clat (usec): min=50, max=205670, avg=45307.38, stdev=29857.82 lat (usec): min=51, max=205672, avg=45310.94, stdev=29854.39 clat percentiles (usec): | 1.00th=[ 56], 5.00th=[ 70], 10.00th=[ 11600], 20.00th=[ 22938], | 30.00th=[ 28705], 40.00th=[ 33817], 50.00th=[ 41681], 60.00th=[ 47973], | 70.00th=[ 57934], 80.00th=[ 66323], 90.00th=[ 82314], 95.00th=[ 96994], | 99.00th=[137364], 99.50th=[202376], 99.90th=[206570], 99.95th=[206570], | 99.99th=[206570] bw ( KiB/s): min= 62, max= 380, per=27.38%, avg=202.92, stdev=73.10, samples=60 iops : min= 3, max= 23, avg=11.88, stdev= 4.60, samples=60 write: IOPS=12, BW=196KiB/s (200kB/s)(6032KiB/30845msec); 0 zone resets clat (usec): min=1567, max=220617, avg=34042.13, stdev=35054.95 lat (usec): min=1568, max=220619, avg=34052.11, stdev=35050.18 clat percentiles (usec): | 1.00th=[ 1795], 5.00th=[ 2278], 10.00th=[ 3261], 20.00th=[ 6128], | 30.00th=[ 9765], 40.00th=[ 15533], 50.00th=[ 23200], 60.00th=[ 31327], | 70.00th=[ 42206], 80.00th=[ 53740], 90.00th=[ 81265], 95.00th=[104334], | 99.00th=[154141], 99.50th=[179307], 99.90th=[221250], 99.95th=[221250], | 99.99th=[221250] bw ( KiB/s): min= 31, max= 439, per=24.73%, avg=192.90, stdev=91.65, samples=60 iops : min= 1, max= 27, avg=11.25, stdev= 5.81, samples=60 lat (usec) : 100=3.91%, 250=0.65%, 500=0.26% lat (msec) : 2=1.56%, 4=4.82%, 10=8.85%, 20=10.03%, 50=39.58% lat (msec) : 100=25.26%, 250=5.08% cpu : usr=0.06%, sys=6.78%, ctx=1864, majf=0, minf=17 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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: Fri Aug 21 09:53:43 2026 read: IOPS=12, BW=198KiB/s (202kB/s)(6032KiB/30531msec) clat (usec): min=43, max=201405, avg=43184.10, stdev=29455.57 lat (usec): min=43, max=201439, avg=43187.52, stdev=29452.77 clat percentiles (usec): | 1.00th=[ 53], 5.00th=[ 69], 10.00th=[ 128], 20.00th=[ 20841], | 30.00th=[ 27657], 40.00th=[ 33817], 50.00th=[ 39584], 60.00th=[ 46924], | 70.00th=[ 52691], 80.00th=[ 64226], 90.00th=[ 81265], 95.00th=[ 94897], | 99.00th=[137364], 99.50th=[158335], 99.90th=[202376], 99.95th=[202376], | 99.99th=[202376] bw ( KiB/s): min= 61, max= 408, per=26.46%, avg=196.10, stdev=79.70, samples=60 iops : min= 3, max= 25, avg=11.43, stdev= 5.03, samples=60 write: IOPS=12, BW=205KiB/s (210kB/s)(6256KiB/30531msec); 0 zone resets clat (usec): min=1609, max=198511, avg=36256.54, stdev=35706.31 lat (usec): min=1611, max=198514, avg=36258.93, stdev=35706.01 clat percentiles (usec): | 1.00th=[ 1729], 5.00th=[ 3032], 10.00th=[ 4359], 20.00th=[ 6456], | 30.00th=[ 11207], 40.00th=[ 17957], 50.00th=[ 24511], 60.00th=[ 33817], | 70.00th=[ 46924], 80.00th=[ 61080], 90.00th=[ 81265], 95.00th=[103285], | 99.00th=[179307], 99.50th=[181404], 99.90th=[198181], 99.95th=[198181], | 99.99th=[198181] bw ( KiB/s): min= 62, max= 447, per=26.35%, avg=205.55, stdev=83.29, samples=60 iops : min= 3, max= 27, avg=12.03, stdev= 5.22, samples=60 lat (usec) : 50=0.13%, 100=4.04%, 250=0.91%, 1000=0.26% lat (msec) : 2=1.43%, 4=3.52%, 10=10.03%, 20=11.59%, 50=37.11% lat (msec) : 100=26.69%, 250=4.30% cpu : usr=0.06%, sys=6.26%, ctx=1780, majf=0, minf=18 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=742KiB/s (759kB/s), 179KiB/s-203KiB/s (183kB/s-208kB/s), io=23.4MiB (24.5MB), run=30531-32294msec WRITE: bw=780KiB/s (799kB/s), 196KiB/s-205KiB/s (200kB/s-210kB/s), io=24.6MiB (25.8MB), run=30531-32294msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179311: Fri Aug 21 09:53:53 2026 read: IOPS=8, BW=140KiB/s (143kB/s)(5920KiB/42369msec) clat (msec): min=7, max=316, avg=44.94, stdev=36.71 lat (msec): min=7, max=316, avg=44.94, stdev=36.71 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 13], 10.00th=[ 16], 20.00th=[ 20], | 30.00th=[ 24], 40.00th=[ 27], 50.00th=[ 33], 60.00th=[ 40], | 70.00th=[ 48], 80.00th=[ 66], 90.00th=[ 94], 95.00th=[ 121], | 99.00th=[ 163], 99.50th=[ 226], 99.90th=[ 317], 99.95th=[ 317], | 99.99th=[ 317] bw ( KiB/s): min= 30, max= 416, per=24.87%, avg=140.04, stdev=87.50, samples=82 iops : min= 1, max= 26, avg= 8.01, stdev= 5.56, samples=82 write: IOPS=9, BW=150KiB/s (154kB/s)(6368KiB/42369msec); 0 zone resets clat (msec): min=14, max=306, avg=63.80, stdev=46.92 lat (msec): min=14, max=306, avg=63.80, stdev=46.92 clat percentiles (msec): | 1.00th=[ 16], 5.00th=[ 22], 10.00th=[ 25], 20.00th=[ 30], | 30.00th=[ 35], 40.00th=[ 42], 50.00th=[ 50], 60.00th=[ 59], | 70.00th=[ 74], 80.00th=[ 89], 90.00th=[ 117], 95.00th=[ 180], | 99.00th=[ 239], 99.50th=[ 275], 99.90th=[ 309], 99.95th=[ 309], | 99.99th=[ 309] bw ( KiB/s): min= 29, max= 447, per=25.22%, avg=149.58, stdev=88.55, samples=83 iops : min= 1, max= 27, avg= 8.60, stdev= 5.59, samples=83 lat (msec) : 10=0.91%, 20=11.85%, 50=48.70%, 100=26.69%, 250=11.46% lat (msec) : 500=0.39% cpu : usr=0.04%, sys=2.48%, ctx=1347, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=179313: Fri Aug 21 09:53:53 2026 read: IOPS=8, BW=137KiB/s (140kB/s)(5744KiB/41895msec) clat (msec): min=7, max=244, avg=43.25, stdev=39.49 lat (msec): min=7, max=244, avg=43.25, stdev=39.49 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 12], 10.00th=[ 14], 20.00th=[ 17], | 30.00th=[ 21], 40.00th=[ 24], 50.00th=[ 31], 60.00th=[ 36], | 70.00th=[ 45], 80.00th=[ 59], 90.00th=[ 91], 95.00th=[ 138], | 99.00th=[ 192], 99.50th=[ 241], 99.90th=[ 245], 99.95th=[ 245], | 99.99th=[ 245] bw ( KiB/s): min= 28, max= 447, per=24.80%, avg=139.65, stdev=100.19, samples=80 iops : min= 1, max= 27, avg= 7.99, stdev= 6.34, samples=80 write: IOPS=9, BW=156KiB/s (160kB/s)(6544KiB/41895msec); 0 zone resets clat (msec): min=15, max=271, avg=64.11, stdev=43.75 lat (msec): min=15, max=271, avg=64.11, stdev=43.75 clat percentiles (msec): | 1.00th=[ 18], 5.00th=[ 22], 10.00th=[ 25], 20.00th=[ 31], | 30.00th=[ 36], 40.00th=[ 41], 50.00th=[ 50], 60.00th=[ 61], | 70.00th=[ 77], 80.00th=[ 94], 90.00th=[ 130], 95.00th=[ 150], | 99.00th=[ 213], 99.50th=[ 218], 99.90th=[ 271], 99.95th=[ 271], | 99.99th=[ 271] bw ( KiB/s): min= 31, max= 383, per=26.16%, avg=155.15, stdev=93.72, samples=82 iops : min= 1, max= 23, avg= 8.96, stdev= 5.92, samples=82 lat (msec) : 10=0.52%, 20=14.58%, 50=47.14%, 100=24.74%, 250=12.89% lat (msec) : 500=0.13% cpu : usr=0.05%, sys=2.60%, ctx=1343, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=359,409,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179315: Fri Aug 21 09:53:53 2026 read: IOPS=9, BW=148KiB/s (151kB/s)(6256KiB/42297msec) clat (msec): min=7, max=233, avg=46.29, stdev=40.49 lat (msec): min=7, max=233, avg=46.31, stdev=40.49 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 13], 10.00th=[ 14], 20.00th=[ 18], | 30.00th=[ 22], 40.00th=[ 27], 50.00th=[ 32], 60.00th=[ 40], | 70.00th=[ 50], 80.00th=[ 67], 90.00th=[ 104], 95.00th=[ 142], | 99.00th=[ 224], 99.50th=[ 228], 99.90th=[ 234], 99.95th=[ 234], | 99.99th=[ 234] bw ( KiB/s): min= 31, max= 503, per=27.08%, avg=152.46, stdev=104.18, samples=81 iops : min= 1, max= 31, avg= 8.79, stdev= 6.61, samples=81 write: IOPS=8, BW=143KiB/s (146kB/s)(6032KiB/42297msec); 0 zone resets clat (msec): min=13, max=227, avg=63.16, stdev=41.60 lat (msec): min=13, max=227, avg=63.16, stdev=41.60 clat percentiles (msec): | 1.00th=[ 19], 5.00th=[ 21], 10.00th=[ 26], 20.00th=[ 32], | 30.00th=[ 36], 40.00th=[ 42], 50.00th=[ 51], 60.00th=[ 58], | 70.00th=[ 70], 80.00th=[ 93], 90.00th=[ 125], 95.00th=[ 161], | 99.00th=[ 203], 99.50th=[ 207], 99.90th=[ 228], 99.95th=[ 228], | 99.99th=[ 228] bw ( KiB/s): min= 28, max= 383, per=24.40%, avg=144.68, stdev=84.19, samples=81 iops : min= 1, max= 23, avg= 8.30, stdev= 5.32, samples=81 lat (msec) : 10=0.91%, 20=14.45%, 50=45.31%, 100=25.65%, 250=13.67% cpu : usr=0.05%, sys=2.50%, ctx=1397, 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=179316: Fri Aug 21 09:53:53 2026 read: IOPS=8, BW=142KiB/s (145kB/s)(6032KiB/42478msec) clat (msec): min=7, max=255, avg=47.58, stdev=43.52 lat (msec): min=7, max=255, avg=47.58, stdev=43.52 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 22], 40.00th=[ 27], 50.00th=[ 32], 60.00th=[ 38], | 70.00th=[ 54], 80.00th=[ 71], 90.00th=[ 110], 95.00th=[ 142], | 99.00th=[ 211], 99.50th=[ 230], 99.90th=[ 257], 99.95th=[ 257], | 99.99th=[ 257] bw ( KiB/s): min= 31, max= 510, per=26.11%, avg=147.00, stdev=92.80, samples=81 iops : min= 1, max= 31, avg= 8.44, stdev= 5.82, samples=81 write: IOPS=9, BW=147KiB/s (151kB/s)(6256KiB/42478msec); 0 zone resets clat (msec): min=17, max=350, avg=61.77, stdev=47.40 lat (msec): min=17, max=350, avg=61.77, stdev=47.40 clat percentiles (msec): | 1.00th=[ 19], 5.00th=[ 22], 10.00th=[ 25], 20.00th=[ 30], | 30.00th=[ 35], 40.00th=[ 40], 50.00th=[ 46], 60.00th=[ 56], | 70.00th=[ 66], 80.00th=[ 89], 90.00th=[ 117], 95.00th=[ 157], | 99.00th=[ 262], 99.50th=[ 317], 99.90th=[ 351], 99.95th=[ 351], | 99.99th=[ 351] bw ( KiB/s): min= 30, max= 447, per=25.15%, avg=149.17, stdev=97.18, samples=83 iops : min= 1, max= 27, avg= 8.58, stdev= 6.16, samples=83 lat (msec) : 10=1.17%, 20=13.67%, 50=46.74%, 100=25.65%, 250=11.85% lat (msec) : 500=0.91% cpu : usr=0.05%, sys=2.50%, ctx=1407, 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=564KiB/s (577kB/s), 137KiB/s-148KiB/s (140kB/s-151kB/s), io=23.4MiB (24.5MB), run=41895-42478msec WRITE: bw=593KiB/s (607kB/s), 143KiB/s-156KiB/s (146kB/s-160kB/s), io=24.6MiB (25.8MB), run=41895-42478msec 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=179330: Fri Aug 21 09:54:09 2026 read: IOPS=2, BW=2466KiB/s (2525kB/s)(7168KiB/2907msec) clat (usec): min=532, max=297311, avg=184109.07, stdev=96874.11 lat (usec): min=533, max=297313, avg=184110.35, stdev=96874.11 clat percentiles (usec): | 1.00th=[ 537], 5.00th=[ 537], 10.00th=[ 537], 20.00th=[121111], | 30.00th=[196084], 40.00th=[196084], 50.00th=[210764], 60.00th=[219153], | 70.00th=[219153], 80.00th=[246416], 90.00th=[295699], 95.00th=[295699], | 99.00th=[295699], 99.50th=[295699], 99.90th=[295699], 99.95th=[295699], | 99.99th=[295699] bw ( KiB/s): min= 1841, max= 4654, per=59.37%, avg=2644.50, stdev=1343.01, samples=4 iops : min= 1, max= 4, avg= 2.00, stdev= 1.41, samples=4 write: IOPS=1, BW=1761KiB/s (1804kB/s)(5120KiB/2907msec); 0 zone resets clat (msec): min=179, max=540, avg=310.49, stdev=146.34 lat (msec): min=179, max=540, avg=310.73, stdev=146.23 clat percentiles (msec): | 1.00th=[ 180], 5.00th=[ 180], 10.00th=[ 180], 20.00th=[ 180], | 30.00th=[ 199], 40.00th=[ 199], 50.00th=[ 279], 60.00th=[ 279], | 70.00th=[ 355], 80.00th=[ 355], 90.00th=[ 542], 95.00th=[ 542], | 99.00th=[ 542], 99.50th=[ 542], 99.90th=[ 542], 99.95th=[ 542], | 99.99th=[ 542] bw ( KiB/s): min= 1841, max= 4023, per=42.23%, avg=2633.00, stdev=1207.68, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 lat (usec) : 750=8.33% lat (msec) : 250=58.33%, 500=25.00%, 750=8.33% cpu : usr=0.03%, sys=23.16%, ctx=264, 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=179331: Fri Aug 21 09:54:09 2026 read: IOPS=0, BW=445KiB/s (456kB/s)(2048KiB/4598msec) clat (msec): min=108, max=223, avg=166.26, stdev=81.60 lat (msec): min=108, max=223, avg=166.26, stdev=81.60 clat percentiles (msec): | 1.00th=[ 109], 5.00th=[ 109], 10.00th=[ 109], 20.00th=[ 109], | 30.00th=[ 109], 40.00th=[ 109], 50.00th=[ 109], 60.00th=[ 224], | 70.00th=[ 224], 80.00th=[ 224], 90.00th=[ 224], 95.00th=[ 224], | 99.00th=[ 224], 99.50th=[ 224], 99.90th=[ 224], 99.95th=[ 224], | 99.99th=[ 224] bw ( KiB/s): min= 1454, max= 2048, per=39.31%, avg=1751.00, stdev=420.02, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 write: IOPS=2, BW=2227KiB/s (2281kB/s)(10.0MiB/4598msec); 0 zone resets clat (msec): min=165, max=930, avg=420.26, stdev=232.40 lat (msec): min=165, max=947, avg=422.22, stdev=236.69 clat percentiles (msec): | 1.00th=[ 165], 5.00th=[ 165], 10.00th=[ 165], 20.00th=[ 199], | 30.00th=[ 271], 40.00th=[ 288], 50.00th=[ 351], 60.00th=[ 368], | 70.00th=[ 489], 80.00th=[ 493], 90.00th=[ 651], 95.00th=[ 927], | 99.00th=[ 927], 99.50th=[ 927], 99.90th=[ 927], 99.95th=[ 927], | 99.99th=[ 927] bw ( KiB/s): min= 1841, max= 4071, per=42.99%, avg=2680.17, stdev=1079.96, samples=6 iops : min= 1, max= 3, avg= 1.83, stdev= 0.98, samples=6 lat (msec) : 250=33.33%, 500=50.00%, 750=8.33%, 1000=8.33% cpu : usr=0.00%, sys=17.60%, ctx=150, 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=179332: Fri Aug 21 09:54:09 2026 read: IOPS=1, BW=1836KiB/s (1880kB/s)(6144KiB/3347msec) clat (usec): min=769, max=302769, avg=122927.64, stdev=143125.79 lat (usec): min=769, max=302770, avg=122928.56, stdev=143125.77 clat percentiles (usec): | 1.00th=[ 766], 5.00th=[ 766], 10.00th=[ 766], 20.00th=[ 783], | 30.00th=[ 783], 40.00th=[ 865], 50.00th=[ 865], 60.00th=[154141], | 70.00th=[278922], 80.00th=[278922], 90.00th=[304088], 95.00th=[304088], | 99.00th=[304088], 99.50th=[304088], 99.90th=[304088], 99.95th=[304088], | 99.99th=[304088] bw ( KiB/s): min= 1980, max= 4096, per=75.94%, avg=3382.33, stdev=1214.52, samples=3 iops : min= 1, max= 4, avg= 2.67, stdev= 1.53, samples=3 write: IOPS=1, BW=1836KiB/s (1880kB/s)(6144KiB/3347msec); 0 zone resets clat (msec): min=214, max=733, avg=415.85, stdev=223.94 lat (msec): min=214, max=733, avg=415.95, stdev=223.96 clat percentiles (msec): | 1.00th=[ 215], 5.00th=[ 215], 10.00th=[ 215], 20.00th=[ 232], | 30.00th=[ 232], 40.00th=[ 241], 50.00th=[ 241], 60.00th=[ 451], | 70.00th=[ 625], 80.00th=[ 625], 90.00th=[ 735], 95.00th=[ 735], | 99.00th=[ 735], 99.50th=[ 735], 99.90th=[ 735], 99.95th=[ 735], | 99.99th=[ 735] bw ( KiB/s): min= 1532, max= 3961, per=36.62%, avg=2283.40, stdev=960.70, samples=5 iops : min= 1, max= 3, avg= 1.60, stdev= 0.89, samples=5 lat (usec) : 1000=25.00% lat (msec) : 250=33.33%, 500=25.00%, 750=16.67% cpu : usr=0.00%, sys=16.92%, ctx=95, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=6,6,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179335: Fri Aug 21 09:54:09 2026 read: IOPS=1, BW=1493KiB/s (1529kB/s)(5120KiB/3429msec) clat (usec): min=409, max=194470, avg=39575.16, stdev=86589.70 lat (usec): min=409, max=194472, avg=39576.12, stdev=86589.96 clat percentiles (usec): | 1.00th=[ 408], 5.00th=[ 408], 10.00th=[ 408], 20.00th=[ 408], | 30.00th=[ 832], 40.00th=[ 832], 50.00th=[ 1020], 60.00th=[ 1020], | 70.00th=[ 1139], 80.00th=[ 1139], 90.00th=[193987], 95.00th=[193987], | 99.00th=[193987], 99.50th=[193987], 99.90th=[193987], 99.95th=[193987], | 99.99th=[193987] bw ( KiB/s): min= 8192, max= 8192, per=100.00%, avg=8192.00, stdev= 0.00, samples=1 iops : min= 8, max= 8, avg= 8.00, stdev= 0.00, samples=1 write: IOPS=2, BW=2090KiB/s (2141kB/s)(7168KiB/3429msec); 0 zone resets clat (msec): min=166, max=840, avg=428.53, stdev=226.20 lat (msec): min=166, max=841, avg=428.65, stdev=226.24 clat percentiles (msec): | 1.00th=[ 167], 5.00th=[ 167], 10.00th=[ 167], 20.00th=[ 239], | 30.00th=[ 300], 40.00th=[ 300], 50.00th=[ 430], 60.00th=[ 481], | 70.00th=[ 481], 80.00th=[ 542], 90.00th=[ 844], 95.00th=[ 844], | 99.00th=[ 844], 99.50th=[ 844], 99.90th=[ 844], 99.95th=[ 844], | 99.99th=[ 844] bw ( KiB/s): min= 1706, max= 2048, per=30.75%, avg=1917.20, stdev=141.65, samples=5 iops : min= 1, max= 2, avg= 1.20, stdev= 0.45, samples=5 lat (usec) : 500=8.33%, 1000=8.33% lat (msec) : 2=16.67%, 250=25.00%, 500=25.00%, 750=8.33%, 1000=8.33% cpu : usr=0.00%, sys=19.57%, ctx=211, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=5,7,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=4454KiB/s (4561kB/s), 445KiB/s-2466KiB/s (456kB/s-2525kB/s), io=20.0MiB (20.0MB), run=2907-4598msec WRITE: bw=6236KiB/s (6385kB/s), 1761KiB/s-2227KiB/s (1804kB/s-2281kB/s), io=28.0MiB (29.4MB), run=2907-4598msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179333: Fri Aug 21 09:54:09 2026 read: IOPS=1, BW=1608KiB/s (1646kB/s)(7168KiB/4459msec) clat (msec): min=68, max=1133, avg=306.78, stdev=370.28 lat (msec): min=68, max=1133, avg=306.78, stdev=370.28 clat percentiles (msec): | 1.00th=[ 69], 5.00th=[ 69], 10.00th=[ 69], 20.00th=[ 111], | 30.00th=[ 144], 40.00th=[ 144], 50.00th=[ 213], 60.00th=[ 232], | 70.00th=[ 232], 80.00th=[ 249], 90.00th=[ 1133], 95.00th=[ 1133], | 99.00th=[ 1133], 99.50th=[ 1133], 99.90th=[ 1133], 99.95th=[ 1133], | 99.99th=[ 1133] bw ( KiB/s): min= 1935, max= 4071, per=65.38%, avg=2753.00, stdev=992.38, samples=4 iops : min= 1, max= 3, avg= 1.75, stdev= 0.96, samples=4 write: IOPS=1, BW=1148KiB/s (1176kB/s)(5120KiB/4459msec); 0 zone resets clat (msec): min=183, max=911, avg=444.83, stdev=313.32 lat (msec): min=183, max=911, avg=444.95, stdev=313.35 clat percentiles (msec): | 1.00th=[ 184], 5.00th=[ 184], 10.00th=[ 184], 20.00th=[ 184], | 30.00th=[ 226], 40.00th=[ 226], 50.00th=[ 284], 60.00th=[ 284], | 70.00th=[ 625], 80.00th=[ 625], 90.00th=[ 911], 95.00th=[ 911], | 99.00th=[ 911], 99.50th=[ 911], 99.90th=[ 911], 99.95th=[ 911], | 99.99th=[ 911] bw ( KiB/s): min= 2011, max= 4087, per=46.03%, avg=2713.67, stdev=1189.45, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 lat (msec) : 100=8.33%, 250=58.33%, 500=8.33%, 750=8.33%, 1000=8.33% lat (msec) : 2000=8.33% cpu : usr=0.00%, sys=8.73%, ctx=115, 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=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=179334: Fri Aug 21 09:54:09 2026 read: IOPS=0, BW=421KiB/s (431kB/s)(2048KiB/4863msec) clat (msec): min=99, max=521, avg=310.75, stdev=298.59 lat (msec): min=99, max=521, avg=310.75, stdev=298.59 clat percentiles (msec): | 1.00th=[ 101], 5.00th=[ 101], 10.00th=[ 101], 20.00th=[ 101], | 30.00th=[ 101], 40.00th=[ 101], 50.00th=[ 101], 60.00th=[ 523], | 70.00th=[ 523], 80.00th=[ 523], 90.00th=[ 523], 95.00th=[ 523], | 99.00th=[ 523], 99.50th=[ 523], 99.90th=[ 523], 99.95th=[ 523], | 99.99th=[ 523] bw ( KiB/s): min= 1935, max= 2011, per=46.85%, avg=1973.00, stdev=53.74, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=2, BW=2106KiB/s (2156kB/s)(10.0MiB/4863msec); 0 zone resets clat (msec): min=70, max=1294, avg=394.16, stdev=347.13 lat (msec): min=70, max=1294, avg=394.26, stdev=347.13 clat percentiles (msec): | 1.00th=[ 71], 5.00th=[ 71], 10.00th=[ 71], 20.00th=[ 144], | 30.00th=[ 174], 40.00th=[ 226], 50.00th=[ 321], 60.00th=[ 363], | 70.00th=[ 380], 80.00th=[ 443], 90.00th=[ 531], 95.00th=[ 1301], | 99.00th=[ 1301], 99.50th=[ 1301], 99.90th=[ 1301], 99.95th=[ 1301], | 99.99th=[ 1301] bw ( KiB/s): min= 1980, max= 4087, per=51.52%, avg=3037.17, stdev=1127.04, samples=6 iops : min= 1, max= 3, avg= 2.00, stdev= 1.10, samples=6 lat (msec) : 100=16.67%, 250=25.00%, 500=33.33%, 750=16.67%, 2000=8.33% cpu : usr=0.02%, sys=6.42%, 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=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=179336: Fri Aug 21 09:54:09 2026 read: IOPS=1, BW=1432KiB/s (1466kB/s)(6144KiB/4291msec) clat (msec): min=78, max=382, avg=215.35, stdev=129.44 lat (msec): min=78, max=382, avg=215.35, stdev=129.44 clat percentiles (msec): | 1.00th=[ 79], 5.00th=[ 79], 10.00th=[ 79], 20.00th=[ 88], | 30.00th=[ 88], 40.00th=[ 140], 50.00th=[ 140], 60.00th=[ 300], | 70.00th=[ 305], 80.00th=[ 305], 90.00th=[ 384], 95.00th=[ 384], | 99.00th=[ 384], 99.50th=[ 384], 99.90th=[ 384], 99.95th=[ 384], | 99.99th=[ 384] bw ( KiB/s): min= 4023, max= 6035, per=100.00%, avg=5029.00, stdev=1422.70, samples=2 iops : min= 3, max= 5, avg= 4.00, stdev= 1.41, samples=2 write: IOPS=1, BW=1432KiB/s (1466kB/s)(6144KiB/4291msec); 0 zone resets clat (msec): min=169, max=727, avg=464.13, stdev=224.57 lat (msec): min=170, max=727, avg=464.45, stdev=224.37 clat percentiles (msec): | 1.00th=[ 171], 5.00th=[ 171], 10.00th=[ 171], 20.00th=[ 284], | 30.00th=[ 284], 40.00th=[ 401], 50.00th=[ 401], 60.00th=[ 493], | 70.00th=[ 709], 80.00th=[ 709], 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= 1935, max= 2043, per=34.06%, avg=2007.83, stdev=43.13, samples=6 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=6 lat (msec) : 100=16.67%, 250=16.67%, 500=50.00%, 750=16.67% cpu : usr=0.00%, sys=6.41%, ctx=103, 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=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=179337: Fri Aug 21 09:54:09 2026 read: IOPS=1, BW=1116KiB/s (1142kB/s)(5120KiB/4589msec) clat (msec): min=83, max=359, avg=200.05, stdev=105.64 lat (msec): min=83, max=359, avg=200.05, stdev=105.64 clat percentiles (msec): | 1.00th=[ 84], 5.00th=[ 84], 10.00th=[ 84], 20.00th=[ 84], | 30.00th=[ 136], 40.00th=[ 136], 50.00th=[ 188], 60.00th=[ 188], | 70.00th=[ 236], 80.00th=[ 236], 90.00th=[ 359], 95.00th=[ 359], | 99.00th=[ 359], 99.50th=[ 359], 99.90th=[ 359], 99.95th=[ 359], | 99.99th=[ 359] bw ( KiB/s): min= 4023, max= 4071, per=96.11%, avg=4047.00, stdev=33.94, samples=2 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1562KiB/s (1599kB/s)(7168KiB/4589msec); 0 zone resets clat (msec): min=166, max=930, avg=476.57, stdev=290.67 lat (msec): min=166, max=930, avg=476.74, stdev=290.63 clat percentiles (msec): | 1.00th=[ 167], 5.00th=[ 167], 10.00th=[ 167], 20.00th=[ 232], | 30.00th=[ 292], 40.00th=[ 292], 50.00th=[ 405], 60.00th=[ 518], | 70.00th=[ 518], 80.00th=[ 793], 90.00th=[ 927], 95.00th=[ 927], | 99.00th=[ 927], 99.50th=[ 927], 99.90th=[ 927], 99.95th=[ 927], | 99.99th=[ 927] bw ( KiB/s): min= 1980, max= 2043, per=34.31%, avg=2022.40, stdev=27.09, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 lat (msec) : 100=8.33%, 250=41.67%, 500=25.00%, 750=8.33%, 1000=16.67% cpu : usr=0.02%, sys=8.54%, ctx=149, 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=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=4211KiB/s (4312kB/s), 421KiB/s-1608KiB/s (431kB/s-1646kB/s), io=20.0MiB (20.0MB), run=4291-4863msec WRITE: bw=5896KiB/s (6037kB/s), 1148KiB/s-2106KiB/s (1176kB/s-2156kB/s), io=28.0MiB (29.4MB), run=4291-4863msec 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=179343: Fri Aug 21 09:54:20 2026 read: IOPS=1, BW=5406KiB/s (5536kB/s)(12.0MiB/2273msec) clat (msec): min=584, max=853, avg=727.99, stdev=135.71 lat (msec): min=584, max=853, avg=727.99, stdev=135.71 clat percentiles (msec): | 1.00th=[ 584], 5.00th=[ 584], 10.00th=[ 584], 20.00th=[ 584], | 30.00th=[ 584], 40.00th=[ 743], 50.00th=[ 743], 60.00th=[ 743], | 70.00th=[ 852], 80.00th=[ 852], 90.00th=[ 852], 95.00th=[ 852], | 99.00th=[ 852], 99.50th=[ 852], 99.90th=[ 852], 99.95th=[ 852], | 99.99th=[ 852] bw ( KiB/s): min= 8110, max= 8175, per=100.00%, avg=8142.50, stdev=45.96, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=66.67%, 1000=33.33% cpu : usr=0.00%, sys=21.43%, ctx=378, 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=179344: Fri Aug 21 09:54:20 2026 read: IOPS=0, BW=1478KiB/s (1514kB/s)(4096KiB/2771msec) clat (nsec): min=961967k, max=961967k, avg=961967143.00, stdev= 0.00 lat (nsec): min=961969k, max=961969k, avg=961969437.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 961], 5.00th=[ 961], 10.00th=[ 961], 20.00th=[ 961], | 30.00th=[ 961], 40.00th=[ 961], 50.00th=[ 961], 60.00th=[ 961], | 70.00th=[ 961], 80.00th=[ 961], 90.00th=[ 961], 95.00th=[ 961], | 99.00th=[ 961], 99.50th=[ 961], 99.90th=[ 961], 99.95th=[ 961], | 99.99th=[ 961] bw ( KiB/s): min= 8110, max= 8110, per=100.00%, avg=8110.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2956KiB/s (3027kB/s)(8192KiB/2771msec); 0 zone resets clat (msec): min=667, max=1105, avg=886.21, stdev=309.58 lat (msec): min=667, max=1105, avg=886.54, stdev=309.52 clat percentiles (msec): | 1.00th=[ 667], 5.00th=[ 667], 10.00th=[ 667], 20.00th=[ 667], | 30.00th=[ 667], 40.00th=[ 667], 50.00th=[ 667], 60.00th=[ 1099], | 70.00th=[ 1099], 80.00th=[ 1099], 90.00th=[ 1099], 95.00th=[ 1099], | 99.00th=[ 1099], 99.50th=[ 1099], 99.90th=[ 1099], 99.95th=[ 1099], | 99.99th=[ 1099] bw ( KiB/s): min= 8175, max= 8175, per=69.13%, avg=8175.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 750=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.07%, sys=5.63%, ctx=111, 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=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=179345: Fri Aug 21 09:54:20 2026 write: IOPS=1, BW=5697KiB/s (5834kB/s)(12.0MiB/2157msec); 0 zone resets clat (msec): min=502, max=995, avg=693.80, stdev=264.13 lat (msec): min=502, max=995, avg=695.15, stdev=263.53 clat percentiles (msec): | 1.00th=[ 502], 5.00th=[ 502], 10.00th=[ 502], 20.00th=[ 502], | 30.00th=[ 502], 40.00th=[ 584], 50.00th=[ 584], 60.00th=[ 584], | 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= 8110, max= 8159, per=68.79%, avg=8134.50, stdev=34.65, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=66.67%, 1000=33.33% cpu : usr=0.05%, sys=7.70%, ctx=98, 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=179346: Fri Aug 21 09:54:20 2026 write: IOPS=1, BW=4741KiB/s (4855kB/s)(12.0MiB/2592msec); 0 zone resets clat (msec): min=210, max=1713, avg=834.82, stdev=783.39 lat (msec): min=211, max=1714, avg=835.38, stdev=783.34 clat percentiles (msec): | 1.00th=[ 211], 5.00th=[ 211], 10.00th=[ 211], 20.00th=[ 211], | 30.00th=[ 211], 40.00th=[ 584], 50.00th=[ 584], 60.00th=[ 584], | 70.00th=[ 1720], 80.00th=[ 1720], 90.00th=[ 1720], 95.00th=[ 1720], | 99.00th=[ 1720], 99.50th=[ 1720], 99.90th=[ 1720], 99.95th=[ 1720], | 99.99th=[ 1720] bw ( KiB/s): min= 8110, max= 8175, per=68.86%, avg=8142.50, stdev=45.96, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 250=33.33%, 750=33.33%, 2000=33.33% cpu : usr=0.00%, sys=6.06%, ctx=82, 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=5913KiB/s (6055kB/s), 1478KiB/s-5406KiB/s (1514kB/s-5536kB/s), io=16.0MiB (16.8MB), run=2273-2771msec WRITE: bw=11.5MiB/s (12.1MB/s), 2956KiB/s-5697KiB/s (3027kB/s-5834kB/s), io=32.0MiB (33.6MB), run=2157-2771msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179348: Fri Aug 21 09:54:21 2026 read: IOPS=1, BW=5928KiB/s (6070kB/s)(12.0MiB/2073msec) clat (msec): min=488, max=828, avg=690.13, stdev=178.75 lat (msec): min=488, max=828, avg=690.13, stdev=178.75 clat percentiles (msec): | 1.00th=[ 489], 5.00th=[ 489], 10.00th=[ 489], 20.00th=[ 489], | 30.00th=[ 489], 40.00th=[ 751], 50.00th=[ 751], 60.00th=[ 751], | 70.00th=[ 827], 80.00th=[ 827], 90.00th=[ 827], 95.00th=[ 827], | 99.00th=[ 827], 99.50th=[ 827], 99.90th=[ 827], 99.95th=[ 827], | 99.99th=[ 827] bw ( KiB/s): min= 6041, max= 8143, per=100.00%, avg=7092.00, stdev=1486.34, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 1000=66.67% cpu : usr=0.00%, sys=5.65%, ctx=50, 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=179349: Fri Aug 21 09:54:21 2026 read: IOPS=0, BW=1712KiB/s (1753kB/s)(4096KiB/2392msec) clat (nsec): min=762428k, max=762428k, avg=762427803.00, stdev= 0.00 lat (nsec): min=762430k, max=762430k, avg=762430066.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 760], 5.00th=[ 760], 10.00th=[ 760], 20.00th=[ 760], | 30.00th=[ 760], 40.00th=[ 760], 50.00th=[ 760], 60.00th=[ 760], | 70.00th=[ 760], 80.00th=[ 760], 90.00th=[ 760], 95.00th=[ 760], | 99.00th=[ 760], 99.50th=[ 760], 99.90th=[ 760], 99.95th=[ 760], | 99.99th=[ 760] 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=3425KiB/s (3507kB/s)(8192KiB/2392msec); 0 zone resets clat (msec): min=724, max=841, avg=783.10, stdev=82.25 lat (msec): min=726, max=841, avg=784.04, stdev=81.22 clat percentiles (msec): | 1.00th=[ 726], 5.00th=[ 726], 10.00th=[ 726], 20.00th=[ 726], | 30.00th=[ 726], 40.00th=[ 726], 50.00th=[ 726], 60.00th=[ 844], | 70.00th=[ 844], 80.00th=[ 844], 90.00th=[ 844], 95.00th=[ 844], | 99.00th=[ 844], 99.50th=[ 844], 99.90th=[ 844], 99.95th=[ 844], | 99.99th=[ 844] bw ( KiB/s): min= 8159, max= 8159, per=59.56%, avg=8159.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 750=33.33%, 1000=66.67% cpu : usr=0.00%, sys=7.99%, ctx=57, 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=179350: Fri Aug 21 09:54:21 2026 write: IOPS=1, BW=5150KiB/s (5274kB/s)(12.0MiB/2386msec); 0 zone resets clat (msec): min=193, max=1171, avg=761.16, stdev=507.62 lat (msec): min=194, max=1172, avg=761.74, stdev=507.22 clat percentiles (msec): | 1.00th=[ 194], 5.00th=[ 194], 10.00th=[ 194], 20.00th=[ 194], | 30.00th=[ 194], 40.00th=[ 919], 50.00th=[ 919], 60.00th=[ 919], | 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= 8143, max= 8143, per=59.45%, avg=8143.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 250=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=6.25%, ctx=46, 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=179351: Fri Aug 21 09:54:21 2026 write: IOPS=1, BW=6144KiB/s (6291kB/s)(12.0MiB/2000msec); 0 zone resets clat (msec): min=192, max=1295, avg=657.62, stdev=571.48 lat (msec): min=193, max=1297, avg=658.58, stdev=572.32 clat percentiles (msec): | 1.00th=[ 192], 5.00th=[ 192], 10.00th=[ 192], 20.00th=[ 192], | 30.00th=[ 192], 40.00th=[ 485], 50.00th=[ 485], 60.00th=[ 485], | 70.00th=[ 1301], 80.00th=[ 1301], 90.00th=[ 1301], 95.00th=[ 1301], | 99.00th=[ 1301], 99.50th=[ 1301], 99.90th=[ 1301], 99.95th=[ 1301], | 99.99th=[ 1301] bw ( KiB/s): min= 5587, max= 5587, per=40.79%, avg=5587.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 250=33.33%, 500=33.33%, 2000=33.33% cpu : usr=0.00%, sys=7.60%, ctx=40, 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=6849KiB/s (7014kB/s), 1712KiB/s-5928KiB/s (1753kB/s-6070kB/s), io=16.0MiB (16.8MB), run=2073-2392msec WRITE: bw=13.4MiB/s (14.0MB/s), 3425KiB/s-6144KiB/s (3507kB/s-6291kB/s), io=32.0MiB (33.6MB), run=2000-2392msec