== sanity test 398b: DIO and buffer IO race ============== 12:43:28 (1786034608) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 6.83667 s, 7.4 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=179520: Thu Aug 6 12:46:05 2026 read: IOPS=11, BW=44.8KiB/s (45.9kB/s)(5992KiB/133696msec) clat (usec): min=34, max=1082.4k, avg=50511.55, stdev=42986.80 lat (usec): min=34, max=1082.4k, avg=50513.52, stdev=42988.74 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 11076], 10.00th=[ 17957], | 20.00th=[ 24249], 30.00th=[ 30016], 40.00th=[ 36439], | 50.00th=[ 42206], 60.00th=[ 50594], 70.00th=[ 60031], | 80.00th=[ 70779], 90.00th=[ 89654], 95.00th=[ 114820], | 99.00th=[ 175113], 99.50th=[ 198181], 99.90th=[ 299893], | 99.95th=[1082131], 99.99th=[1082131] bw ( KiB/s): min= 5, max= 126, per=24.87%, avg=44.51, stdev=19.38, samples=261 iops : min= 1, max= 31, avg=10.50, stdev= 4.87, samples=261 write: IOPS=11, BW=47.1KiB/s (48.2kB/s)(6296KiB/133696msec); 0 zone resets clat (usec): min=811, max=254146, avg=36471.49, stdev=38014.21 lat (usec): min=811, max=254147, avg=36483.30, stdev=38012.28 clat percentiles (usec): | 1.00th=[ 1172], 5.00th=[ 1336], 10.00th=[ 1549], 20.00th=[ 3392], | 30.00th=[ 7046], 40.00th=[ 15926], 50.00th=[ 26608], 60.00th=[ 35390], | 70.00th=[ 47449], 80.00th=[ 63177], 90.00th=[ 88605], 95.00th=[112722], | 99.00th=[162530], 99.50th=[181404], 99.90th=[217056], 99.95th=[254804], | 99.99th=[254804] bw ( KiB/s): min= 7, max= 174, per=25.05%, avg=47.08, stdev=22.18, samples=260 iops : min= 1, max= 43, avg=11.15, stdev= 5.61, samples=260 lat (usec) : 50=0.23%, 100=1.56%, 250=0.07%, 500=0.03%, 1000=0.20% lat (msec) : 2=6.45%, 4=4.43%, 10=7.10%, 20=9.02%, 50=36.75% lat (msec) : 100=26.86%, 250=7.23%, 500=0.07%, 2000=0.03% cpu : usr=0.06%, sys=4.62%, ctx=6444, 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=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=179521: Thu Aug 6 12:46:05 2026 read: IOPS=11, BW=44.0KiB/s (46.1kB/s)(5940KiB/132010msec) clat (usec): min=36, max=338177, avg=47719.48, stdev=32028.77 lat (usec): min=37, max=338178, avg=47721.94, stdev=32028.73 clat percentiles (usec): | 1.00th=[ 53], 5.00th=[ 9241], 10.00th=[ 17695], 20.00th=[ 23725], | 30.00th=[ 29230], 40.00th=[ 34866], 50.00th=[ 41157], 60.00th=[ 48497], | 70.00th=[ 57410], 80.00th=[ 67634], 90.00th=[ 85459], 95.00th=[104334], | 99.00th=[173016], 99.50th=[187696], 99.90th=[227541], 99.95th=[337642], | 99.99th=[337642] bw ( KiB/s): min= 5, max= 95, per=25.07%, avg=44.87, stdev=17.97, samples=258 iops : min= 1, max= 23, avg=10.59, stdev= 4.49, samples=258 write: IOPS=12, BW=48.1KiB/s (49.2kB/s)(6348KiB/132010msec); 0 zone resets clat (usec): min=866, max=1238.6k, avg=38189.00, stdev=49232.72 lat (usec): min=868, max=1238.6k, avg=38192.93, stdev=49232.49 clat percentiles (usec): | 1.00th=[ 1221], 5.00th=[ 1385], 10.00th=[ 1844], | 20.00th=[ 3851], 30.00th=[ 7308], 40.00th=[ 14484], | 50.00th=[ 26084], 60.00th=[ 37487], 70.00th=[ 49021], | 80.00th=[ 65799], 90.00th=[ 90702], 95.00th=[ 114820], | 99.00th=[ 168821], 99.50th=[ 191890], 99.90th=[ 225444], | 99.95th=[1233126], 99.99th=[1233126] bw ( KiB/s): min= 7, max= 149, per=25.43%, avg=47.80, stdev=21.96, samples=258 iops : min= 1, max= 37, avg=11.33, stdev= 5.55, samples=258 lat (usec) : 50=0.36%, 100=1.69%, 250=0.07%, 500=0.07%, 1000=0.07% lat (msec) : 2=5.89%, 4=4.79%, 10=7.88%, 20=8.27%, 50=37.24% lat (msec) : 100=27.12%, 250=6.51%, 500=0.03%, 2000=0.03% cpu : usr=0.08%, sys=4.62%, ctx=6365, 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=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=179522: Thu Aug 6 12:46:05 2026 read: IOPS=11, BW=46.3KiB/s (47.4kB/s)(6028KiB/130186msec) clat (usec): min=34, max=383408, avg=47854.95, stdev=32387.53 lat (usec): min=35, max=383409, avg=47857.50, stdev=32388.26 clat percentiles (usec): | 1.00th=[ 51], 5.00th=[ 8586], 10.00th=[ 17433], 20.00th=[ 23725], | 30.00th=[ 29754], 40.00th=[ 34866], 50.00th=[ 41157], 60.00th=[ 49021], | 70.00th=[ 57934], 80.00th=[ 68682], 90.00th=[ 86508], 95.00th=[102237], | 99.00th=[145753], 99.50th=[181404], 99.90th=[341836], 99.95th=[383779], | 99.99th=[383779] bw ( KiB/s): min= 7, max= 104, per=25.71%, avg=46.02, stdev=18.26, samples=255 iops : min= 1, max= 26, avg=10.87, stdev= 4.60, samples=255 write: IOPS=12, BW=48.1KiB/s (49.2kB/s)(6260KiB/130186msec); 0 zone resets clat (usec): min=946, max=1033.6k, avg=36709.76, stdev=44887.26 lat (usec): min=947, max=1033.6k, avg=36714.99, stdev=44890.27 clat percentiles (usec): | 1.00th=[ 1237], 5.00th=[ 1385], 10.00th=[ 1795], | 20.00th=[ 3949], 30.00th=[ 7832], 40.00th=[ 16319], | 50.00th=[ 25822], 60.00th=[ 34866], 70.00th=[ 47449], | 80.00th=[ 62129], 90.00th=[ 86508], 95.00th=[ 109577], | 99.00th=[ 170918], 99.50th=[ 187696], 99.90th=[ 244319], | 99.95th=[1035994], 99.99th=[1035994] bw ( KiB/s): min= 7, max= 110, per=25.52%, avg=47.98, stdev=20.60, samples=254 iops : min= 1, max= 27, avg=11.38, stdev= 5.20, samples=254 lat (usec) : 50=0.46%, 100=1.73%, 250=0.07%, 500=0.07%, 1000=0.03% lat (msec) : 2=5.89%, 4=4.39%, 10=7.13%, 20=8.89%, 50=38.64% lat (msec) : 100=26.50%, 250=6.12%, 500=0.07%, 2000=0.03% cpu : usr=0.06%, sys=4.76%, ctx=6348, 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=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=179524: Thu Aug 6 12:46:05 2026 read: IOPS=11, BW=45.5KiB/s (46.6kB/s)(6052KiB/133128msec) clat (usec): min=35, max=201738, avg=46633.59, stdev=29595.04 lat (usec): min=36, max=201739, avg=46639.83, stdev=29591.36 clat percentiles (usec): | 1.00th=[ 53], 5.00th=[ 8586], 10.00th=[ 16909], 20.00th=[ 23725], | 30.00th=[ 29754], 40.00th=[ 34866], 50.00th=[ 41157], 60.00th=[ 47449], | 70.00th=[ 56361], 80.00th=[ 66847], 90.00th=[ 85459], 95.00th=[104334], | 99.00th=[149947], 99.50th=[168821], 99.90th=[198181], 99.95th=[202376], | 99.99th=[202376] bw ( KiB/s): min= 7, max= 126, per=25.45%, avg=45.55, stdev=20.27, samples=259 iops : min= 1, max= 31, avg=10.76, stdev= 5.11, samples=259 write: IOPS=11, BW=46.8KiB/s (47.0kB/s)(6236KiB/133128msec); 0 zone resets clat (usec): min=958, max=1311.9k, avg=39763.26, stdev=52317.62 lat (usec): min=959, max=1311.9k, avg=39766.89, stdev=52318.39 clat percentiles (usec): | 1.00th=[ 1221], 5.00th=[ 1352], 10.00th=[ 1663], | 20.00th=[ 4178], 30.00th=[ 8717], 40.00th=[ 18482], | 50.00th=[ 27919], 60.00th=[ 38011], 70.00th=[ 49546], | 80.00th=[ 65274], 90.00th=[ 92799], 95.00th=[ 120062], | 99.00th=[ 187696], 99.50th=[ 204473], 99.90th=[ 421528], | 99.95th=[1317012], 99.99th=[1317012] bw ( KiB/s): min= 7, max= 111, per=24.83%, avg=46.69, stdev=20.05, samples=260 iops : min= 1, max= 27, avg=11.05, stdev= 5.04, samples=260 lat (usec) : 50=0.33%, 100=1.79%, 250=0.07%, 500=0.07%, 750=0.03% lat (usec) : 1000=0.10% lat (msec) : 2=5.92%, 4=3.97%, 10=6.32%, 20=9.34%, 50=38.93% lat (msec) : 100=26.24%, 250=6.84%, 500=0.03%, 2000=0.03% cpu : usr=0.07%, sys=4.60%, ctx=6521, majf=0, minf=19 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=180KiB/s (184kB/s), 44.8KiB/s-46.3KiB/s (45.9kB/s-47.4kB/s), io=23.4MiB (24.6MB), run=130186-133696msec WRITE: bw=188KiB/s (193kB/s), 46.8KiB/s-48.1KiB/s (47.0kB/s-49.2kB/s), io=24.6MiB (25.7MB), run=130186-133696msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179519: Thu Aug 6 12:46:49 2026 read: IOPS=8, BW=33.9KiB/s (34.7kB/s)(5992KiB/176698msec) clat (msec): min=5, max=1092, avg=46.33, stdev=49.78 lat (msec): min=5, max=1092, avg=46.34, stdev=49.78 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 13], 20.00th=[ 16], | 30.00th=[ 21], 40.00th=[ 26], 50.00th=[ 31], 60.00th=[ 39], | 70.00th=[ 51], 80.00th=[ 68], 90.00th=[ 104], 95.00th=[ 132], | 99.00th=[ 201], 99.50th=[ 228], 99.90th=[ 330], 99.95th=[ 1099], | 99.99th=[ 1099] bw ( KiB/s): min= 7, max= 135, per=26.02%, avg=35.13, stdev=25.71, samples=330 iops : min= 1, max= 33, avg= 8.11, stdev= 6.46, samples=330 write: IOPS=8, BW=35.6KiB/s (36.5kB/s)(6296KiB/176698msec); 0 zone resets clat (msec): min=7, max=468, avg=67.80, stdev=50.11 lat (msec): min=7, max=468, avg=67.81, stdev=50.12 clat percentiles (msec): | 1.00th=[ 15], 5.00th=[ 19], 10.00th=[ 23], 20.00th=[ 29], | 30.00th=[ 36], 40.00th=[ 43], 50.00th=[ 52], 60.00th=[ 65], | 70.00th=[ 81], 80.00th=[ 100], 90.00th=[ 138], 95.00th=[ 167], | 99.00th=[ 236], 99.50th=[ 284], 99.90th=[ 397], 99.95th=[ 468], | 99.99th=[ 468] bw ( KiB/s): min= 7, max= 160, per=25.28%, avg=35.64, stdev=24.84, samples=342 iops : min= 1, max= 40, avg= 8.23, stdev= 6.26, samples=342 lat (msec) : 10=2.60%, 20=15.30%, 50=41.28%, 100=25.62%, 250=14.58% lat (msec) : 500=0.59%, 2000=0.03% cpu : usr=0.05%, sys=1.87%, ctx=5005, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1498,1574,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179523: Thu Aug 6 12:46:49 2026 read: IOPS=8, BW=34.1KiB/s (34.9kB/s)(5940KiB/174039msec) clat (msec): min=4, max=1254, avg=45.56, stdev=51.80 lat (msec): min=4, max=1254, avg=45.57, stdev=51.80 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 16], | 30.00th=[ 20], 40.00th=[ 25], 50.00th=[ 31], 60.00th=[ 39], | 70.00th=[ 49], 80.00th=[ 65], 90.00th=[ 104], 95.00th=[ 136], | 99.00th=[ 205], 99.50th=[ 228], 99.90th=[ 317], 99.95th=[ 1250], | 99.99th=[ 1250] bw ( KiB/s): min= 6, max= 166, per=25.88%, avg=34.93, stdev=26.98, samples=330 iops : min= 1, max= 41, avg= 8.06, stdev= 6.79, samples=330 write: IOPS=9, BW=36.5KiB/s (37.3kB/s)(6348KiB/174039msec); 0 zone resets clat (msec): min=9, max=438, avg=66.70, stdev=47.41 lat (msec): min=9, max=438, avg=66.70, stdev=47.41 clat percentiles (msec): | 1.00th=[ 16], 5.00th=[ 20], 10.00th=[ 23], 20.00th=[ 29], | 30.00th=[ 35], 40.00th=[ 43], 50.00th=[ 52], 60.00th=[ 65], | 70.00th=[ 81], 80.00th=[ 102], 90.00th=[ 134], 95.00th=[ 159], | 99.00th=[ 220], 99.50th=[ 255], 99.90th=[ 334], 99.95th=[ 439], | 99.99th=[ 439] bw ( KiB/s): min= 7, max= 143, per=25.85%, avg=36.45, stdev=24.58, samples=338 iops : min= 1, max= 35, avg= 8.44, stdev= 6.18, samples=338 lat (msec) : 10=3.22%, 20=14.42%, 50=42.15%, 100=24.51%, 250=15.30% lat (msec) : 500=0.36%, 2000=0.03% cpu : usr=0.06%, sys=1.88%, ctx=4932, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1485,1587,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179525: Thu Aug 6 12:46:49 2026 read: IOPS=8, BW=33.9KiB/s (34.7kB/s)(6028KiB/177826msec) clat (msec): min=6, max=381, avg=46.40, stdev=42.53 lat (msec): min=6, max=381, avg=46.41, stdev=42.53 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 21], 40.00th=[ 26], 50.00th=[ 31], 60.00th=[ 40], | 70.00th=[ 53], 80.00th=[ 70], 90.00th=[ 102], 95.00th=[ 136], | 99.00th=[ 190], 99.50th=[ 243], 99.90th=[ 317], 99.95th=[ 380], | 99.99th=[ 380] bw ( KiB/s): min= 7, max= 166, per=25.67%, avg=34.65, stdev=25.09, samples=338 iops : min= 1, max= 41, avg= 7.99, stdev= 6.30, samples=338 write: IOPS=8, BW=35.2KiB/s (36.0kB/s)(6260KiB/177826msec); 0 zone resets clat (msec): min=9, max=1282, avg=68.56, stdev=58.68 lat (msec): min=9, max=1282, avg=68.57, stdev=58.68 clat percentiles (msec): | 1.00th=[ 16], 5.00th=[ 20], 10.00th=[ 23], 20.00th=[ 29], | 30.00th=[ 36], 40.00th=[ 43], 50.00th=[ 52], 60.00th=[ 64], | 70.00th=[ 80], 80.00th=[ 103], 90.00th=[ 138], 95.00th=[ 167], | 99.00th=[ 251], 99.50th=[ 284], 99.90th=[ 393], 99.95th=[ 1284], | 99.99th=[ 1284] bw ( KiB/s): min= 7, max= 143, per=25.14%, avg=35.45, stdev=25.12, samples=343 iops : min= 1, max= 35, avg= 8.19, stdev= 6.33, samples=343 lat (msec) : 10=2.41%, 20=14.81%, 50=41.11%, 100=25.88%, 250=15.14% lat (msec) : 500=0.62%, 2000=0.03% cpu : usr=0.06%, sys=1.89%, ctx=5035, 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=179526: Thu Aug 6 12:46:49 2026 read: IOPS=8, BW=34.2KiB/s (35.0kB/s)(6052KiB/176855msec) clat (msec): min=5, max=340, avg=45.71, stdev=43.40 lat (msec): min=5, max=340, avg=45.71, stdev=43.40 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 16], | 30.00th=[ 20], 40.00th=[ 25], 50.00th=[ 31], 60.00th=[ 39], | 70.00th=[ 49], 80.00th=[ 69], 90.00th=[ 103], 95.00th=[ 144], | 99.00th=[ 203], 99.50th=[ 236], 99.90th=[ 309], 99.95th=[ 342], | 99.99th=[ 342] bw ( KiB/s): min= 7, max= 152, per=25.92%, avg=34.99, stdev=25.72, samples=336 iops : min= 1, max= 38, avg= 8.07, stdev= 6.47, samples=336 write: IOPS=8, BW=35.3KiB/s (36.1kB/s)(6236KiB/176855msec); 0 zone resets clat (msec): min=10, max=1261, avg=68.76, stdev=58.18 lat (msec): min=10, max=1261, avg=68.76, stdev=58.18 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 20], 10.00th=[ 24], 20.00th=[ 29], | 30.00th=[ 36], 40.00th=[ 44], 50.00th=[ 53], 60.00th=[ 65], | 70.00th=[ 81], 80.00th=[ 102], 90.00th=[ 131], 95.00th=[ 163], | 99.00th=[ 262], 99.50th=[ 300], 99.90th=[ 464], 99.95th=[ 1267], | 99.99th=[ 1267] bw ( KiB/s): min= 6, max= 127, per=25.10%, avg=35.39, stdev=23.93, samples=342 iops : min= 1, max= 31, avg= 8.17, stdev= 6.02, samples=342 lat (msec) : 10=2.99%, 20=15.04%, 50=41.18%, 100=25.23%, 250=14.68% lat (msec) : 500=0.85%, 2000=0.03% cpu : usr=0.05%, sys=1.86%, ctx=4941, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1513,1559,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=135KiB/s (138kB/s), 33.9KiB/s-34.2KiB/s (34.7kB/s-35.0kB/s), io=23.4MiB (24.6MB), run=174039-177826msec WRITE: bw=141KiB/s (145kB/s), 35.2KiB/s-36.5KiB/s (36.0kB/s-37.3kB/s), io=24.6MiB (25.7MB), run=174039-177826msec 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=179566: Thu Aug 6 12:47:37 2026 read: IOPS=10, BW=172KiB/s (176kB/s)(5920KiB/34467msec) clat (usec): min=42, max=336312, avg=49863.49, stdev=33547.72 lat (usec): min=43, max=336313, avg=49864.73, stdev=33547.73 clat percentiles (usec): | 1.00th=[ 53], 5.00th=[ 73], 10.00th=[ 18220], 20.00th=[ 27132], | 30.00th=[ 32900], 40.00th=[ 38011], 50.00th=[ 43254], 60.00th=[ 50070], | 70.00th=[ 57934], 80.00th=[ 70779], 90.00th=[ 91751], 95.00th=[104334], | 99.00th=[147850], 99.50th=[177210], 99.90th=[337642], 99.95th=[337642], | 99.99th=[337642] bw ( KiB/s): min= 31, max= 319, per=25.48%, avg=171.46, stdev=65.18, samples=68 iops : min= 1, max= 19, avg= 9.97, stdev= 4.05, samples=68 write: IOPS=11, BW=185KiB/s (189kB/s)(6368KiB/34467msec); 0 zone resets clat (usec): min=1629, max=311203, avg=40029.65, stdev=43686.59 lat (usec): min=1632, max=311206, avg=40040.61, stdev=43684.03 clat percentiles (usec): | 1.00th=[ 1795], 5.00th=[ 2040], 10.00th=[ 3163], 20.00th=[ 5866], | 30.00th=[ 8848], 40.00th=[ 15926], 50.00th=[ 25035], 60.00th=[ 36439], | 70.00th=[ 51119], 80.00th=[ 69731], 90.00th=[ 98042], 95.00th=[129500], | 99.00th=[189793], 99.50th=[246416], 99.90th=[312476], 99.95th=[312476], | 99.99th=[312476] bw ( KiB/s): min= 31, max= 444, per=26.01%, avg=184.13, stdev=87.28, samples=68 iops : min= 1, max= 27, avg=10.78, stdev= 5.47, samples=68 lat (usec) : 50=0.26%, 100=3.26% lat (msec) : 2=2.47%, 4=4.82%, 10=9.24%, 20=9.11%, 50=35.55% lat (msec) : 100=27.08%, 250=7.94%, 500=0.26% cpu : usr=0.06%, sys=5.19%, ctx=1637, 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=179567: Thu Aug 6 12:47:37 2026 read: IOPS=10, BW=162KiB/s (165kB/s)(5744KiB/35554msec) clat (usec): min=39, max=297777, avg=52152.14, stdev=35842.77 lat (usec): min=40, max=297778, avg=52155.20, stdev=35843.82 clat percentiles (usec): | 1.00th=[ 47], 5.00th=[ 65], 10.00th=[ 17695], 20.00th=[ 27657], | 30.00th=[ 32637], 40.00th=[ 39584], 50.00th=[ 45876], 60.00th=[ 53216], | 70.00th=[ 62653], 80.00th=[ 71828], 90.00th=[ 89654], 95.00th=[120062], | 99.00th=[170918], 99.50th=[212861], 99.90th=[295699], 99.95th=[295699], | 99.99th=[295699] bw ( KiB/s): min= 31, max= 319, per=23.95%, avg=161.19, stdev=75.14, samples=70 iops : min= 1, max= 19, avg= 9.31, stdev= 4.69, samples=70 write: IOPS=11, BW=184KiB/s (188kB/s)(6544KiB/35554msec); 0 zone resets clat (usec): min=1314, max=225874, avg=40585.39, stdev=39661.17 lat (usec): min=1316, max=225876, avg=40588.48, stdev=39662.32 clat percentiles (usec): | 1.00th=[ 1713], 5.00th=[ 2089], 10.00th=[ 3228], 20.00th=[ 5932], | 30.00th=[ 10421], 40.00th=[ 19792], 50.00th=[ 28705], 60.00th=[ 40633], | 70.00th=[ 53740], 80.00th=[ 70779], 90.00th=[103285], 95.00th=[120062], | 99.00th=[166724], 99.50th=[175113], 99.90th=[225444], 99.95th=[225444], | 99.99th=[225444] bw ( KiB/s): min= 31, max= 510, per=25.92%, avg=183.53, stdev=79.15, samples=70 iops : min= 1, max= 31, avg=10.73, stdev= 5.02, samples=70 lat (usec) : 50=0.52%, 100=2.86%, 250=0.13%, 500=0.13%, 1000=0.13% lat (msec) : 2=2.08%, 4=5.08%, 10=8.59%, 20=7.42%, 50=35.03% lat (msec) : 100=28.78%, 250=9.11%, 500=0.13% cpu : usr=0.05%, sys=4.92%, ctx=1661, 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=179568: Thu Aug 6 12:47:37 2026 read: IOPS=11, BW=177KiB/s (181kB/s)(6256KiB/35386msec) clat (usec): min=36, max=290331, avg=51762.36, stdev=38739.33 lat (usec): min=36, max=290332, avg=51773.08, stdev=38728.43 clat percentiles (usec): | 1.00th=[ 51], 5.00th=[ 63], 10.00th=[ 10421], 20.00th=[ 26608], | 30.00th=[ 32900], 40.00th=[ 39584], 50.00th=[ 46924], 60.00th=[ 53740], | 70.00th=[ 60556], 80.00th=[ 70779], 90.00th=[ 94897], 95.00th=[114820], | 99.00th=[242222], 99.50th=[274727], 99.90th=[291505], 99.95th=[291505], | 99.99th=[291505] bw ( KiB/s): min= 31, max= 442, per=26.03%, avg=175.20, stdev=73.86, samples=69 iops : min= 1, max= 27, avg=10.22, stdev= 4.64, samples=69 write: IOPS=10, BW=170KiB/s (175kB/s)(6032KiB/35386msec); 0 zone resets clat (usec): min=1369, max=249225, avg=39629.53, stdev=40763.70 lat (usec): min=1372, max=249228, avg=39631.63, stdev=40763.73 clat percentiles (usec): | 1.00th=[ 1762], 5.00th=[ 1942], 10.00th=[ 2671], 20.00th=[ 6325], | 30.00th=[ 10159], 40.00th=[ 20055], 50.00th=[ 28181], 60.00th=[ 37487], | 70.00th=[ 48497], 80.00th=[ 65274], 90.00th=[ 89654], 95.00th=[121111], | 99.00th=[189793], 99.50th=[202376], 99.90th=[248513], 99.95th=[248513], | 99.99th=[248513] bw ( KiB/s): min= 31, max= 446, per=23.57%, avg=166.87, stdev=83.59, samples=69 iops : min= 1, max= 27, avg= 9.68, stdev= 5.25, samples=69 lat (usec) : 50=0.39%, 100=4.30%, 250=0.26% lat (msec) : 2=2.99%, 4=4.17%, 10=7.55%, 20=6.51%, 50=37.24% lat (msec) : 100=28.91%, 250=7.29%, 500=0.39% cpu : usr=0.08%, sys=4.64%, ctx=1654, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179569: Thu Aug 6 12:47:37 2026 read: IOPS=10, BW=173KiB/s (177kB/s)(6032KiB/34899msec) clat (usec): min=39, max=184355, avg=50550.61, stdev=33316.47 lat (usec): min=39, max=184357, avg=50554.57, stdev=33316.30 clat percentiles (usec): | 1.00th=[ 46], 5.00th=[ 61], 10.00th=[ 131], 20.00th=[ 24773], | 30.00th=[ 33162], 40.00th=[ 39584], 50.00th=[ 49021], 60.00th=[ 55313], | 70.00th=[ 63177], 80.00th=[ 77071], 90.00th=[ 93848], 95.00th=[107480], | 99.00th=[168821], 99.50th=[181404], 99.90th=[183501], 99.95th=[183501], | 99.99th=[183501] bw ( KiB/s): min= 31, max= 380, per=25.31%, avg=170.32, stdev=70.19, samples=68 iops : min= 1, max= 23, avg= 9.91, stdev= 4.40, samples=68 write: IOPS=11, BW=179KiB/s (184kB/s)(6256KiB/34899msec); 0 zone resets clat (usec): min=1757, max=214101, avg=39824.62, stdev=39199.07 lat (usec): min=1758, max=214103, avg=39827.85, stdev=39198.82 clat percentiles (usec): | 1.00th=[ 1860], 5.00th=[ 2343], 10.00th=[ 3982], 20.00th=[ 7242], | 30.00th=[ 11863], 40.00th=[ 20055], 50.00th=[ 27657], 60.00th=[ 37487], | 70.00th=[ 49546], 80.00th=[ 63177], 90.00th=[100140], 95.00th=[117965], | 99.00th=[185598], 99.50th=[198181], 99.90th=[214959], 99.95th=[214959], | 99.99th=[214959] bw ( KiB/s): min= 31, max= 415, per=25.03%, avg=177.24, stdev=78.55, samples=68 iops : min= 1, max= 25, avg=10.35, stdev= 4.93, samples=68 lat (usec) : 50=0.65%, 100=4.04%, 250=0.26%, 1000=0.26% lat (msec) : 2=1.82%, 4=3.65%, 10=9.11%, 20=8.33%, 50=32.81% lat (msec) : 100=30.86%, 250=8.20% cpu : usr=0.07%, sys=4.39%, ctx=1683, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=674KiB/s (690kB/s), 162KiB/s-177KiB/s (165kB/s-181kB/s), io=23.4MiB (24.5MB), run=34467-35554msec WRITE: bw=709KiB/s (726kB/s), 170KiB/s-185KiB/s (175kB/s-189kB/s), io=24.6MiB (25.8MB), run=34467-35554msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179571: Thu Aug 6 12:47:50 2026 read: IOPS=7, BW=125KiB/s (128kB/s)(5920KiB/47192msec) clat (msec): min=7, max=251, avg=49.17, stdev=43.36 lat (msec): min=7, max=251, avg=49.18, stdev=43.36 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 13], 10.00th=[ 15], 20.00th=[ 20], | 30.00th=[ 23], 40.00th=[ 28], 50.00th=[ 33], 60.00th=[ 41], | 70.00th=[ 52], 80.00th=[ 71], 90.00th=[ 116], 95.00th=[ 138], | 99.00th=[ 215], 99.50th=[ 228], 99.90th=[ 251], 99.95th=[ 251], | 99.99th=[ 251] bw ( KiB/s): min= 30, max= 382, per=25.71%, avg=129.08, stdev=85.23, samples=90 iops : min= 1, max= 23, avg= 7.26, stdev= 5.38, samples=90 write: IOPS=8, BW=135KiB/s (138kB/s)(6368KiB/47192msec); 0 zone resets clat (msec): min=14, max=337, avg=72.71, stdev=52.85 lat (msec): min=14, max=337, avg=72.71, stdev=52.85 clat percentiles (msec): | 1.00th=[ 18], 5.00th=[ 23], 10.00th=[ 27], 20.00th=[ 33], | 30.00th=[ 39], 40.00th=[ 46], 50.00th=[ 55], 60.00th=[ 67], | 70.00th=[ 84], 80.00th=[ 104], 90.00th=[ 157], 95.00th=[ 180], | 99.00th=[ 279], 99.50th=[ 330], 99.90th=[ 338], 99.95th=[ 338], | 99.99th=[ 338] bw ( KiB/s): min= 25, max= 351, per=25.99%, avg=137.24, stdev=82.70, samples=91 iops : min= 1, max= 21, avg= 7.77, stdev= 5.21, samples=91 lat (msec) : 10=0.65%, 20=11.72%, 50=44.27%, 100=25.39%, 250=17.19% lat (msec) : 500=0.78% cpu : usr=0.05%, sys=1.67%, ctx=1130, 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=179572: Thu Aug 6 12:47:50 2026 read: IOPS=7, BW=120KiB/s (123kB/s)(5744KiB/47687msec) clat (msec): min=7, max=246, avg=49.29, stdev=45.50 lat (msec): min=7, max=246, avg=49.29, stdev=45.50 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 12], 10.00th=[ 15], 20.00th=[ 20], | 30.00th=[ 24], 40.00th=[ 27], 50.00th=[ 32], 60.00th=[ 40], | 70.00th=[ 50], 80.00th=[ 71], 90.00th=[ 113], 95.00th=[ 163], | 99.00th=[ 207], 99.50th=[ 213], 99.90th=[ 247], 99.95th=[ 247], | 99.99th=[ 247] bw ( KiB/s): min= 30, max= 477, per=25.12%, avg=126.09, stdev=93.61, samples=90 iops : min= 1, max= 29, avg= 7.08, stdev= 5.94, samples=90 write: IOPS=8, BW=137KiB/s (141kB/s)(6544KiB/47687msec); 0 zone resets clat (msec): min=14, max=339, avg=73.22, stdev=51.06 lat (msec): min=14, max=339, avg=73.22, stdev=51.06 clat percentiles (msec): | 1.00th=[ 19], 5.00th=[ 23], 10.00th=[ 28], 20.00th=[ 34], | 30.00th=[ 40], 40.00th=[ 46], 50.00th=[ 54], 60.00th=[ 70], | 70.00th=[ 86], 80.00th=[ 113], 90.00th=[ 150], 95.00th=[ 180], | 99.00th=[ 207], 99.50th=[ 245], 99.90th=[ 338], 99.95th=[ 338], | 99.99th=[ 338] bw ( KiB/s): min= 31, max= 446, per=26.16%, avg=138.11, stdev=90.67, samples=93 iops : min= 1, max= 27, avg= 7.83, stdev= 5.74, samples=93 lat (msec) : 10=1.04%, 20=10.94%, 50=45.96%, 100=24.48%, 250=17.32% lat (msec) : 500=0.26% cpu : usr=0.05%, sys=1.78%, ctx=1228, 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=179573: Thu Aug 6 12:47:50 2026 read: IOPS=8, BW=131KiB/s (134kB/s)(6256KiB/47680msec) clat (msec): min=6, max=270, avg=50.96, stdev=46.12 lat (msec): min=6, max=270, avg=50.96, stdev=46.12 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 13], 10.00th=[ 16], 20.00th=[ 21], | 30.00th=[ 25], 40.00th=[ 30], 50.00th=[ 34], 60.00th=[ 41], | 70.00th=[ 53], 80.00th=[ 74], 90.00th=[ 112], 95.00th=[ 153], | 99.00th=[ 222], 99.50th=[ 251], 99.90th=[ 271], 99.95th=[ 271], | 99.99th=[ 271] bw ( KiB/s): min= 31, max= 477, per=27.05%, avg=135.78, stdev=97.66, samples=91 iops : min= 1, max= 29, avg= 7.68, stdev= 6.19, samples=91 write: IOPS=7, BW=127KiB/s (130kB/s)(6032KiB/47680msec); 0 zone resets clat (msec): min=15, max=332, avg=73.45, stdev=50.07 lat (msec): min=15, max=332, avg=73.46, stdev=50.08 clat percentiles (msec): | 1.00th=[ 20], 5.00th=[ 25], 10.00th=[ 28], 20.00th=[ 34], | 30.00th=[ 40], 40.00th=[ 48], 50.00th=[ 57], 60.00th=[ 70], | 70.00th=[ 87], 80.00th=[ 110], 90.00th=[ 148], 95.00th=[ 178], | 99.00th=[ 226], 99.50th=[ 309], 99.90th=[ 334], 99.95th=[ 334], | 99.99th=[ 334] bw ( KiB/s): min= 31, max= 382, per=23.80%, avg=125.67, stdev=76.77, samples=94 iops : min= 1, max= 23, avg= 7.04, stdev= 4.88, samples=94 lat (msec) : 10=0.78%, 20=10.16%, 50=45.44%, 100=25.65%, 250=17.32% lat (msec) : 500=0.65% cpu : usr=0.04%, sys=1.77%, ctx=1244, 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=179574: Thu Aug 6 12:47:50 2026 read: IOPS=7, BW=128KiB/s (131kB/s)(6032KiB/47295msec) clat (msec): min=8, max=264, avg=47.43, stdev=40.21 lat (msec): min=8, max=264, avg=47.43, stdev=40.21 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 14], 10.00th=[ 15], 20.00th=[ 19], | 30.00th=[ 24], 40.00th=[ 28], 50.00th=[ 34], 60.00th=[ 41], | 70.00th=[ 51], 80.00th=[ 69], 90.00th=[ 107], 95.00th=[ 134], | 99.00th=[ 203], 99.50th=[ 220], 99.90th=[ 266], 99.95th=[ 266], | 99.99th=[ 266] bw ( KiB/s): min= 30, max= 446, per=26.26%, avg=131.81, stdev=90.26, samples=89 iops : min= 1, max= 27, avg= 7.43, stdev= 5.68, samples=89 write: IOPS=8, BW=132KiB/s (135kB/s)(6256KiB/47295msec); 0 zone resets clat (msec): min=17, max=344, avg=75.11, stdev=56.35 lat (msec): min=17, max=344, avg=75.11, stdev=56.35 clat percentiles (msec): | 1.00th=[ 19], 5.00th=[ 23], 10.00th=[ 28], 20.00th=[ 34], | 30.00th=[ 41], 40.00th=[ 47], 50.00th=[ 54], 60.00th=[ 67], | 70.00th=[ 83], 80.00th=[ 109], 90.00th=[ 155], 95.00th=[ 194], | 99.00th=[ 288], 99.50th=[ 326], 99.90th=[ 347], 99.95th=[ 347], | 99.99th=[ 347] bw ( KiB/s): min= 31, max= 381, per=25.23%, avg=133.20, stdev=82.12, samples=92 iops : min= 1, max= 23, avg= 7.51, stdev= 5.21, samples=92 lat (msec) : 10=0.65%, 20=11.85%, 50=44.14%, 100=26.69%, 250=15.63% lat (msec) : 500=1.04% cpu : usr=0.05%, sys=1.79%, ctx=1184, 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=502KiB/s (514kB/s), 120KiB/s-131KiB/s (123kB/s-134kB/s), io=23.4MiB (24.5MB), run=47192-47687msec WRITE: bw=528KiB/s (541kB/s), 127KiB/s-137KiB/s (130kB/s-141kB/s), io=24.6MiB (25.8MB), run=47192-47687msec 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=179588: Thu Aug 6 12:48:12 2026 read: IOPS=0, BW=854KiB/s (874kB/s)(7168KiB/8398msec) clat (msec): min=76, max=1239, avg=453.89, stdev=413.78 lat (msec): min=76, max=1239, avg=453.89, stdev=413.78 clat percentiles (msec): | 1.00th=[ 77], 5.00th=[ 77], 10.00th=[ 77], 20.00th=[ 117], | 30.00th=[ 155], 40.00th=[ 155], 50.00th=[ 359], 60.00th=[ 584], | 70.00th=[ 584], 80.00th=[ 651], 90.00th=[ 1234], 95.00th=[ 1234], | 99.00th=[ 1234], 99.50th=[ 1234], 99.90th=[ 1234], 99.95th=[ 1234], | 99.99th=[ 1234] bw ( KiB/s): min= 1928, max= 2048, per=84.94%, avg=1997.00, stdev=41.96, samples=6 iops : min= 1, max= 2, avg= 1.17, stdev= 0.41, samples=6 write: IOPS=0, BW=610KiB/s (624kB/s)(5120KiB/8398msec); 0 zone resets clat (msec): min=216, max=3478, avg=990.77, stdev=1396.10 lat (msec): min=216, max=3478, avg=991.20, stdev=1395.88 clat percentiles (msec): | 1.00th=[ 218], 5.00th=[ 218], 10.00th=[ 218], 20.00th=[ 218], | 30.00th=[ 284], 40.00th=[ 284], 50.00th=[ 464], 60.00th=[ 464], | 70.00th=[ 514], 80.00th=[ 514], 90.00th=[ 3473], 95.00th=[ 3473], | 99.00th=[ 3473], 99.50th=[ 3473], 99.90th=[ 3473], 99.95th=[ 3473], | 99.99th=[ 3473] bw ( KiB/s): min= 1976, max= 4096, per=82.15%, avg=2703.67, stdev=1206.21, samples=3 iops : min= 1, max= 4, avg= 2.00, stdev= 1.73, samples=3 lat (msec) : 100=8.33%, 250=25.00%, 500=25.00%, 750=25.00%, 2000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=2.23%, 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=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=179589: Thu Aug 6 12:48:12 2026 read: IOPS=0, BW=235KiB/s (241kB/s)(2048KiB/8711msec) clat (msec): min=96, max=111, avg=104.27, stdev=10.89 lat (msec): min=96, max=111, avg=104.27, stdev=10.89 clat percentiles (msec): | 1.00th=[ 97], 5.00th=[ 97], 10.00th=[ 97], 20.00th=[ 97], | 30.00th=[ 97], 40.00th=[ 97], 50.00th=[ 97], 60.00th=[ 112], | 70.00th=[ 112], 80.00th=[ 112], 90.00th=[ 112], 95.00th=[ 112], | 99.00th=[ 112], 99.50th=[ 112], 99.90th=[ 112], 99.95th=[ 112], | 99.99th=[ 112] bw ( KiB/s): min= 1718, max= 2027, per=79.65%, avg=1872.50, stdev=218.50, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1176KiB/s (1204kB/s)(10.0MiB/8711msec); 0 zone resets clat (msec): min=177, max=3584, avg=836.68, stdev=997.67 lat (msec): min=177, max=3585, avg=836.90, stdev=997.65 clat percentiles (msec): | 1.00th=[ 178], 5.00th=[ 178], 10.00th=[ 178], 20.00th=[ 215], | 30.00th=[ 376], 40.00th=[ 435], 50.00th=[ 535], 60.00th=[ 609], | 70.00th=[ 651], 80.00th=[ 793], 90.00th=[ 1003], 95.00th=[ 3574], | 99.00th=[ 3574], 99.50th=[ 3574], 99.90th=[ 3574], 99.95th=[ 3574], | 99.99th=[ 3574] bw ( KiB/s): min= 1928, max= 3953, per=68.62%, avg=2258.12, stdev=685.96, samples=8 iops : min= 1, max= 3, avg= 1.37, stdev= 0.74, samples=8 lat (msec) : 100=8.33%, 250=25.00%, 500=16.67%, 750=25.00%, 1000=8.33% lat (msec) : 2000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=1.61%, ctx=70, 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=179590: Thu Aug 6 12:48:12 2026 read: IOPS=0, BW=736KiB/s (754kB/s)(6144KiB/8347msec) clat (msec): min=95, max=3684, avg=938.03, stdev=1380.32 lat (msec): min=95, max=3684, avg=938.03, stdev=1380.32 clat percentiles (msec): | 1.00th=[ 96], 5.00th=[ 96], 10.00th=[ 96], 20.00th=[ 155], | 30.00th=[ 155], 40.00th=[ 209], 50.00th=[ 209], 60.00th=[ 584], | 70.00th=[ 902], 80.00th=[ 902], 90.00th=[ 3675], 95.00th=[ 3675], | 99.00th=[ 3675], 99.50th=[ 3675], 99.90th=[ 3675], 99.95th=[ 3675], | 99.99th=[ 3675] bw ( KiB/s): min= 1996, max= 4096, per=100.00%, avg=2536.75, stdev=1039.74, samples=4 iops : min= 1, max= 4, avg= 2.00, stdev= 1.41, samples=4 write: IOPS=0, BW=736KiB/s (754kB/s)(6144KiB/8347msec); 0 zone resets clat (msec): min=177, max=899, avg=443.04, stdev=270.81 lat (msec): min=177, max=902, avg=443.99, stdev=272.16 clat percentiles (msec): | 1.00th=[ 178], 5.00th=[ 178], 10.00th=[ 178], 20.00th=[ 232], | 30.00th=[ 232], 40.00th=[ 288], 50.00th=[ 288], 60.00th=[ 489], | 70.00th=[ 575], 80.00th=[ 575], 90.00th=[ 902], 95.00th=[ 902], | 99.00th=[ 902], 99.50th=[ 902], 99.90th=[ 902], 99.95th=[ 902], | 99.99th=[ 902] bw ( KiB/s): min= 1928, max= 2868, per=65.73%, avg=2163.20, stdev=396.34, samples=5 iops : min= 1, max= 2, avg= 1.40, stdev= 0.55, samples=5 lat (msec) : 100=8.33%, 250=33.33%, 500=16.67%, 750=16.67%, 1000=16.67% lat (msec) : >=2000=8.33% cpu : usr=0.01%, sys=1.39%, ctx=62, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=6,6,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179591: Thu Aug 6 12:48:12 2026 read: IOPS=0, BW=694KiB/s (711kB/s)(5120KiB/7378msec) clat (msec): min=79, max=741, avg=339.94, stdev=291.59 lat (msec): min=79, max=741, avg=339.94, stdev=291.59 clat percentiles (msec): | 1.00th=[ 81], 5.00th=[ 81], 10.00th=[ 81], 20.00th=[ 81], | 30.00th=[ 117], 40.00th=[ 117], 50.00th=[ 211], 60.00th=[ 211], | 70.00th=[ 550], 80.00th=[ 550], 90.00th=[ 743], 95.00th=[ 743], | 99.00th=[ 743], 99.50th=[ 743], 99.90th=[ 743], 99.95th=[ 743], | 99.99th=[ 743] bw ( KiB/s): min= 4047, max= 4055, per=100.00%, avg=4051.00, stdev= 5.66, samples=2 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=2 write: IOPS=0, BW=972KiB/s (995kB/s)(7168KiB/7378msec); 0 zone resets clat (msec): min=131, max=2012, avg=799.05, stdev=608.29 lat (msec): min=131, max=2012, avg=799.16, stdev=608.30 clat percentiles (msec): | 1.00th=[ 132], 5.00th=[ 132], 10.00th=[ 132], 20.00th=[ 380], | 30.00th=[ 518], 40.00th=[ 518], 50.00th=[ 743], 60.00th=[ 793], | 70.00th=[ 793], 80.00th=[ 1011], 90.00th=[ 2005], 95.00th=[ 2005], | 99.00th=[ 2005], 99.50th=[ 2005], 99.90th=[ 2005], 99.95th=[ 2005], | 99.99th=[ 2005] bw ( KiB/s): min= 1756, max= 2048, per=60.10%, avg=1978.00, stdev=106.80, samples=7 iops : min= 1, max= 2, avg= 1.29, stdev= 0.49, samples=7 lat (msec) : 100=8.33%, 250=25.00%, 500=8.33%, 750=33.33%, 1000=8.33% lat (msec) : 2000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=2.70%, ctx=77, 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=2351KiB/s (2407kB/s), 235KiB/s-854KiB/s (241kB/s-874kB/s), io=20.0MiB (20.0MB), run=7378-8711msec WRITE: bw=3291KiB/s (3370kB/s), 610KiB/s-1176KiB/s (624kB/s-1204kB/s), io=28.0MiB (29.4MB), run=7378-8711msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179592: Thu Aug 6 12:48:12 2026 read: IOPS=2, BW=3009KiB/s (3081kB/s)(7168KiB/2382msec) clat (usec): min=759, max=292901, avg=200098.38, stdev=94541.08 lat (usec): min=761, max=292902, avg=200099.74, stdev=94541.01 clat percentiles (usec): | 1.00th=[ 758], 5.00th=[ 758], 10.00th=[ 758], 20.00th=[189793], | 30.00th=[206570], 40.00th=[206570], 50.00th=[217056], 60.00th=[229639], | 70.00th=[229639], 80.00th=[263193], 90.00th=[291505], 95.00th=[291505], | 99.00th=[291505], 99.50th=[291505], 99.90th=[291505], 99.95th=[291505], | 99.99th=[291505] bw ( KiB/s): min= 2019, max= 4079, per=100.00%, avg=2538.00, stdev=1027.34, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 write: IOPS=2, BW=2149KiB/s (2201kB/s)(5120KiB/2382msec); 0 zone resets clat (msec): min=33, max=336, avg=182.48, stdev=124.24 lat (msec): min=33, max=336, avg=182.58, stdev=124.24 clat percentiles (msec): | 1.00th=[ 34], 5.00th=[ 34], 10.00th=[ 34], 20.00th=[ 34], | 30.00th=[ 81], 40.00th=[ 81], 50.00th=[ 213], 60.00th=[ 213], | 70.00th=[ 249], 80.00th=[ 249], 90.00th=[ 338], 95.00th=[ 338], | 99.00th=[ 338], 99.50th=[ 338], 99.90th=[ 338], 99.95th=[ 338], | 99.99th=[ 338] bw ( KiB/s): min= 2027, max= 6083, per=100.00%, avg=4055.00, stdev=2868.03, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 lat (usec) : 1000=8.33% lat (msec) : 50=8.33%, 100=8.33%, 250=50.00%, 500=25.00% cpu : usr=0.21%, sys=17.26%, ctx=118, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=7,5,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179593: Thu Aug 6 12:48:12 2026 read: IOPS=0, BW=233KiB/s (239kB/s)(2048KiB/8773msec) clat (usec): min=539, max=309484, avg=155012.01, stdev=218457.54 lat (usec): min=540, max=309486, avg=155013.42, stdev=218457.80 clat percentiles (usec): | 1.00th=[ 537], 5.00th=[ 537], 10.00th=[ 537], 20.00th=[ 537], | 30.00th=[ 537], 40.00th=[ 537], 50.00th=[ 537], 60.00th=[308282], | 70.00th=[308282], 80.00th=[308282], 90.00th=[308282], 95.00th=[308282], | 99.00th=[308282], 99.50th=[308282], 99.90th=[308282], 99.95th=[308282], | 99.99th=[308282] bw ( KiB/s): min= 1484, max= 2035, per=75.39%, avg=1759.50, stdev=389.62, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1167KiB/s (1195kB/s)(10.0MiB/8773msec); 0 zone resets clat (msec): min=127, max=3747, avg=823.70, stdev=1069.25 lat (msec): min=127, max=3748, avg=823.81, stdev=1069.25 clat percentiles (msec): | 1.00th=[ 128], 5.00th=[ 128], 10.00th=[ 128], 20.00th=[ 155], | 30.00th=[ 180], 40.00th=[ 372], 50.00th=[ 558], 60.00th=[ 600], | 70.00th=[ 651], 80.00th=[ 835], 90.00th=[ 1011], 95.00th=[ 3742], | 99.00th=[ 3742], 99.50th=[ 3742], 99.90th=[ 3742], 99.95th=[ 3742], | 99.99th=[ 3742] bw ( KiB/s): min= 2019, max= 2043, per=62.19%, avg=2032.33, stdev= 9.69, samples=6 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=6 lat (usec) : 750=8.33% lat (msec) : 250=25.00%, 500=16.67%, 750=25.00%, 1000=8.33%, 2000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=6.44%, ctx=127, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=2,10,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179594: Thu Aug 6 12:48:12 2026 read: IOPS=0, BW=970KiB/s (993kB/s)(6144KiB/6333msec) clat (usec): min=494, max=2541.2k, avg=632662.60, stdev=964133.08 lat (usec): min=496, max=2541.2k, avg=632663.84, stdev=964133.02 clat percentiles (usec): | 1.00th=[ 494], 5.00th=[ 494], 10.00th=[ 494], | 20.00th=[ 578], 30.00th=[ 578], 40.00th=[ 270533], | 50.00th=[ 270533], 60.00th=[ 358613], 70.00th=[ 624952], | 80.00th=[ 624952], 90.00th=[2533360], 95.00th=[2533360], | 99.00th=[2533360], 99.50th=[2533360], 99.90th=[2533360], | 99.95th=[2533360], 99.99th=[2533360] bw ( KiB/s): min= 2019, max= 4039, per=100.00%, avg=2533.25, stdev=1003.91, samples=4 iops : min= 1, max= 3, avg= 1.75, stdev= 0.96, samples=4 write: IOPS=0, BW=970KiB/s (993kB/s)(6144KiB/6333msec); 0 zone resets clat (msec): min=98, max=1010, avg=394.54, stdev=343.23 lat (msec): min=98, max=1011, avg=394.62, stdev=343.23 clat percentiles (msec): | 1.00th=[ 99], 5.00th=[ 99], 10.00th=[ 99], 20.00th=[ 203], | 30.00th=[ 203], 40.00th=[ 226], 50.00th=[ 226], 60.00th=[ 249], | 70.00th=[ 584], 80.00th=[ 584], 90.00th=[ 1011], 95.00th=[ 1011], | 99.00th=[ 1011], 99.50th=[ 1011], 99.90th=[ 1011], 99.95th=[ 1011], | 99.99th=[ 1011] bw ( KiB/s): min= 1939, max= 2832, per=67.67%, avg=2211.50, stdev=416.35, samples=4 iops : min= 1, max= 2, avg= 1.50, stdev= 0.58, samples=4 lat (usec) : 500=8.33%, 750=8.33% lat (msec) : 100=8.33%, 250=25.00%, 500=16.67%, 750=16.67%, 2000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.02%, sys=8.84%, ctx=474, 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=179595: Thu Aug 6 12:48:12 2026 read: IOPS=0, BW=675KiB/s (691kB/s)(5120KiB/7583msec) clat (usec): min=609, max=199927, avg=135252.40, stdev=78133.44 lat (usec): min=610, max=199928, avg=135253.57, stdev=78133.54 clat percentiles (usec): | 1.00th=[ 611], 5.00th=[ 611], 10.00th=[ 611], 20.00th=[ 611], | 30.00th=[141558], 40.00th=[141558], 50.00th=[162530], 60.00th=[162530], | 70.00th=[170918], 80.00th=[170918], 90.00th=[200279], 95.00th=[200279], | 99.00th=[200279], 99.50th=[200279], 99.90th=[200279], 99.95th=[200279], | 99.99th=[200279] bw ( KiB/s): min= 2039, max= 6144, per=100.00%, avg=4091.50, stdev=2902.67, samples=2 iops : min= 1, max= 6, avg= 3.50, stdev= 3.54, samples=2 write: IOPS=0, BW=945KiB/s (968kB/s)(7168KiB/7583msec); 0 zone resets clat (msec): min=151, max=2071, avg=949.92, stdev=623.19 lat (msec): min=151, max=2071, avg=950.00, stdev=623.19 clat percentiles (msec): | 1.00th=[ 153], 5.00th=[ 153], 10.00th=[ 153], 20.00th=[ 600], | 30.00th=[ 600], 40.00th=[ 600], 50.00th=[ 760], 60.00th=[ 1200], | 70.00th=[ 1200], 80.00th=[ 1267], 90.00th=[ 2072], 95.00th=[ 2072], | 99.00th=[ 2072], 99.50th=[ 2072], 99.90th=[ 2072], 99.95th=[ 2072], | 99.99th=[ 2072] bw ( KiB/s): min= 1939, max= 2048, per=61.85%, avg=2021.33, stdev=41.42, samples=6 iops : min= 1, max= 2, avg= 1.33, stdev= 0.52, samples=6 lat (usec) : 750=8.33% lat (msec) : 250=41.67%, 750=16.67%, 1000=8.33%, 2000=16.67%, >=2000=8.33% cpu : usr=0.00%, sys=6.16%, ctx=174, 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=2334KiB/s (2390kB/s), 233KiB/s-3009KiB/s (239kB/s-3081kB/s), io=20.0MiB (20.0MB), run=2382-8773msec WRITE: bw=3268KiB/s (3347kB/s), 945KiB/s-2149KiB/s (968kB/s-2201kB/s), io=28.0MiB (29.4MB), run=2382-8773msec 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=179604: Thu Aug 6 12:48:36 2026 read: IOPS=0, BW=1867KiB/s (1912kB/s)(12.0MiB/6581msec) clat (msec): min=394, max=5019, avg=2105.55, stdev=2536.40 lat (msec): min=394, max=5019, avg=2105.55, stdev=2536.40 clat percentiles (msec): | 1.00th=[ 397], 5.00th=[ 397], 10.00th=[ 397], 20.00th=[ 397], | 30.00th=[ 397], 40.00th=[ 902], 50.00th=[ 902], 60.00th=[ 902], | 70.00th=[ 5000], 80.00th=[ 5000], 90.00th=[ 5000], 95.00th=[ 5000], | 99.00th=[ 5000], 99.50th=[ 5000], 99.90th=[ 5000], 99.95th=[ 5000], | 99.99th=[ 5000] bw ( KiB/s): min= 7968, max= 8078, per=100.00%, avg=8023.00, stdev=77.78, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 1000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=1.31%, ctx=69, majf=0, minf=10 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=3,0,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179605: Thu Aug 6 12:48:36 2026 read: IOPS=0, BW=606KiB/s (621kB/s)(4096KiB/6756msec) clat (nsec): min=4783.6M, max=4783.6M, avg=4783647501.00, stdev= 0.00 lat (nsec): min=4783.7M, max=4783.7M, avg=4783650276.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 4799], 5.00th=[ 4799], 10.00th=[ 4799], 20.00th=[ 4799], | 30.00th=[ 4799], 40.00th=[ 4799], 50.00th=[ 4799], 60.00th=[ 4799], | 70.00th=[ 4799], 80.00th=[ 4799], 90.00th=[ 4799], 95.00th=[ 4799], | 99.00th=[ 4799], 99.50th=[ 4799], 99.90th=[ 4799], 99.95th=[ 4799], | 99.99th=[ 4799] bw ( KiB/s): min= 8143, max= 8143, per=100.00%, avg=8143.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=1213KiB/s (1242kB/s)(8192KiB/6756msec); 0 zone resets clat (msec): min=320, max=1176, avg=748.83, stdev=605.33 lat (msec): min=321, max=1177, avg=749.50, stdev=605.91 clat percentiles (msec): | 1.00th=[ 321], 5.00th=[ 321], 10.00th=[ 321], 20.00th=[ 321], | 30.00th=[ 321], 40.00th=[ 321], 50.00th=[ 321], 60.00th=[ 1183], | 70.00th=[ 1183], 80.00th=[ 1183], 90.00th=[ 1183], 95.00th=[ 1183], | 99.00th=[ 1183], 99.50th=[ 1183], 99.90th=[ 1183], 99.95th=[ 1183], | 99.99th=[ 1183] bw ( KiB/s): min= 8143, max= 8143, per=100.00%, avg=8143.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=1.48%, ctx=46, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1,2,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179606: Thu Aug 6 12:48:36 2026 write: IOPS=0, BW=1886KiB/s (1932kB/s)(12.0MiB/6514msec); 0 zone resets clat (msec): min=781, max=4418, avg=2017.84, stdev=2079.26 lat (msec): min=782, max=4420, avg=2018.79, stdev=2080.12 clat percentiles (msec): | 1.00th=[ 785], 5.00th=[ 785], 10.00th=[ 785], 20.00th=[ 785], | 30.00th=[ 785], 40.00th=[ 852], 50.00th=[ 852], 60.00th=[ 852], | 70.00th=[ 4396], 80.00th=[ 4396], 90.00th=[ 4396], 95.00th=[ 4396], | 99.00th=[ 4396], 99.50th=[ 4396], 99.90th=[ 4396], 99.95th=[ 4396], | 99.99th=[ 4396] bw ( KiB/s): min= 7892, max= 8159, per=100.00%, avg=8025.50, stdev=188.80, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 1000=66.67%, >=2000=33.33% cpu : usr=0.00%, sys=3.47%, ctx=99, majf=0, minf=10 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179607: Thu Aug 6 12:48:36 2026 write: IOPS=0, BW=2085KiB/s (2135kB/s)(12.0MiB/5893msec); 0 zone resets clat (msec): min=389, max=4698, avg=1838.80, stdev=2476.44 lat (msec): min=391, max=4698, avg=1839.50, stdev=2476.13 clat percentiles (msec): | 1.00th=[ 388], 5.00th=[ 388], 10.00th=[ 388], 20.00th=[ 388], | 30.00th=[ 388], 40.00th=[ 430], 50.00th=[ 430], 60.00th=[ 430], | 70.00th=[ 4732], 80.00th=[ 4732], 90.00th=[ 4732], 95.00th=[ 4732], | 99.00th=[ 4732], 99.50th=[ 4732], 99.90th=[ 4732], 99.95th=[ 4732], | 99.99th=[ 4732] bw ( KiB/s): min= 8047, max= 8143, per=100.00%, avg=8095.00, stdev=67.88, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=66.67%, >=2000=33.33% cpu : usr=0.02%, sys=2.04%, ctx=54, majf=0, minf=10 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=2425KiB/s (2483kB/s), 606KiB/s-1867KiB/s (621kB/s-1912kB/s), io=16.0MiB (16.8MB), run=6581-6756msec WRITE: bw=4850KiB/s (4967kB/s), 1213KiB/s-2085KiB/s (1242kB/s-2135kB/s), io=32.0MiB (33.6MB), run=5893-6756msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179608: Thu Aug 6 12:48:36 2026 read: IOPS=0, BW=2027KiB/s (2076kB/s)(12.0MiB/6061msec) clat (msec): min=795, max=4299, avg=1968.09, stdev=2019.15 lat (msec): min=795, max=4299, avg=1968.09, stdev=2019.15 clat percentiles (msec): | 1.00th=[ 793], 5.00th=[ 793], 10.00th=[ 793], 20.00th=[ 793], | 30.00th=[ 793], 40.00th=[ 810], 50.00th=[ 810], 60.00th=[ 810], | 70.00th=[ 4329], 80.00th=[ 4329], 90.00th=[ 4329], 95.00th=[ 4329], | 99.00th=[ 4329], 99.50th=[ 4329], 99.90th=[ 4329], 99.95th=[ 4329], | 99.99th=[ 4329] bw ( KiB/s): min= 7984, max= 8110, per=100.00%, avg=8047.00, stdev=89.10, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 1000=66.67%, >=2000=33.33% cpu : usr=0.05%, sys=5.61%, ctx=614, majf=0, minf=10 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=3,0,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179609: Thu Aug 6 12:48:36 2026 read: IOPS=0, BW=722KiB/s (739kB/s)(4096KiB/5675msec) clat (nsec): min=4068.4M, max=4068.4M, avg=4068403167.00, stdev= 0.00 lat (nsec): min=4068.4M, max=4068.4M, avg=4068405511.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 4077], 5.00th=[ 4077], 10.00th=[ 4077], 20.00th=[ 4077], | 30.00th=[ 4077], 40.00th=[ 4077], 50.00th=[ 4077], 60.00th=[ 4077], | 70.00th=[ 4077], 80.00th=[ 4077], 90.00th=[ 4077], 95.00th=[ 4077], | 99.00th=[ 4077], 99.50th=[ 4077], 99.90th=[ 4077], 99.95th=[ 4077], | 99.99th=[ 4077] 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=1444KiB/s (1478kB/s)(8192KiB/5675msec); 0 zone resets clat (msec): min=571, max=716, avg=644.13, stdev=103.00 lat (msec): min=572, max=717, avg=644.83, stdev=102.64 clat percentiles (msec): | 1.00th=[ 575], 5.00th=[ 575], 10.00th=[ 575], 20.00th=[ 575], | 30.00th=[ 575], 40.00th=[ 575], 50.00th=[ 575], 60.00th=[ 718], | 70.00th=[ 718], 80.00th=[ 718], 90.00th=[ 718], 95.00th=[ 718], | 99.00th=[ 718], 99.50th=[ 718], 99.90th=[ 718], 99.95th=[ 718], | 99.99th=[ 718] bw ( KiB/s): min= 7772, max= 7772, per=100.00%, avg=7772.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 750=66.67%, >=2000=33.33% cpu : usr=0.05%, sys=3.17%, ctx=472, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1,2,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179610: Thu Aug 6 12:48:36 2026 write: IOPS=0, BW=1804KiB/s (1847kB/s)(12.0MiB/6812msec); 0 zone resets clat (msec): min=194, max=4863, avg=2090.19, stdev=2455.16 lat (msec): min=195, max=4864, avg=2091.02, stdev=2454.92 clat percentiles (msec): | 1.00th=[ 194], 5.00th=[ 194], 10.00th=[ 194], 20.00th=[ 194], | 30.00th=[ 194], 40.00th=[ 1217], 50.00th=[ 1217], 60.00th=[ 1217], | 70.00th=[ 4866], 80.00th=[ 4866], 90.00th=[ 4866], 95.00th=[ 4866], | 99.00th=[ 4866], 99.50th=[ 4866], 99.90th=[ 4866], 99.95th=[ 4866], | 99.99th=[ 4866] bw ( KiB/s): min= 7984, max= 8126, per=100.00%, avg=8055.00, stdev=100.41, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 250=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.04%, sys=1.54%, ctx=48, majf=0, minf=10 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179611: Thu Aug 6 12:48:36 2026 write: IOPS=0, BW=2013KiB/s (2061kB/s)(12.0MiB/6105msec); 0 zone resets clat (msec): min=381, max=4798, avg=1923.31, stdev=2492.48 lat (msec): min=381, max=4799, avg=1923.75, stdev=2492.42 clat percentiles (msec): | 1.00th=[ 380], 5.00th=[ 380], 10.00th=[ 380], 20.00th=[ 380], | 30.00th=[ 380], 40.00th=[ 592], 50.00th=[ 592], 60.00th=[ 592], | 70.00th=[ 4799], 80.00th=[ 4799], 90.00th=[ 4799], 95.00th=[ 4799], | 99.00th=[ 4799], 99.50th=[ 4799], 99.90th=[ 4799], 99.95th=[ 4799], | 99.99th=[ 4799] bw ( KiB/s): min= 8062, max= 8175, per=100.00%, avg=8118.50, stdev=79.90, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 750=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=0.92%, ctx=38, majf=0, minf=10 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=2703KiB/s (2768kB/s), 722KiB/s-2027KiB/s (739kB/s-2076kB/s), io=16.0MiB (16.8MB), run=5675-6061msec WRITE: bw=4810KiB/s (4926kB/s), 1444KiB/s-2013KiB/s (1478kB/s-2061kB/s), io=32.0MiB (33.6MB), run=5675-6812msec