== sanity test 398b: DIO and buffer IO race ============== 18:21:21 (1788646881) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 6.05547 s, 8.3 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=145036: Sat Sep 5 18:23:38 2026 read: IOPS=13, BW=52.7KiB/s (53.9kB/s)(5992KiB/113802msec) clat (usec): min=30, max=558773, avg=37195.24, stdev=31815.57 lat (usec): min=30, max=558776, avg=37203.48, stdev=31815.73 clat percentiles (usec): | 1.00th=[ 45], 5.00th=[ 57], 10.00th=[ 66], 20.00th=[ 15533], | 30.00th=[ 20841], 40.00th=[ 25297], 50.00th=[ 31065], 60.00th=[ 37487], | 70.00th=[ 45876], 80.00th=[ 57934], 90.00th=[ 74974], 95.00th=[ 90702], | 99.00th=[135267], 99.50th=[158335], 99.90th=[210764], 99.95th=[557843], | 99.99th=[557843] bw ( KiB/s): min= 7, max= 127, per=25.87%, avg=52.26, stdev=23.04, samples=223 iops : min= 1, max= 31, avg=12.43, stdev= 5.81, samples=223 write: IOPS=13, BW=55.3KiB/s (56.7kB/s)(6296KiB/113802msec); 0 zone resets clat (usec): min=633, max=322784, avg=36817.38, stdev=37839.69 lat (usec): min=634, max=322786, avg=36819.47, stdev=37839.59 clat percentiles (usec): | 1.00th=[ 1029], 5.00th=[ 1123], 10.00th=[ 1221], 20.00th=[ 2704], | 30.00th=[ 6980], 40.00th=[ 15533], 50.00th=[ 26608], 60.00th=[ 38011], | 70.00th=[ 51119], 80.00th=[ 65274], 90.00th=[ 88605], 95.00th=[110625], | 99.00th=[147850], 99.50th=[162530], 99.90th=[320865], 99.95th=[320865], | 99.99th=[320865] bw ( KiB/s): min= 15, max= 143, per=25.97%, avg=55.05, stdev=22.30, samples=223 iops : min= 3, max= 35, avg=13.13, stdev= 5.63, samples=223 lat (usec) : 50=0.78%, 100=5.18%, 250=0.26%, 500=0.10%, 750=0.07% lat (usec) : 1000=0.39% lat (msec) : 2=8.37%, 4=3.81%, 10=5.70%, 20=11.46%, 50=35.35% lat (msec) : 100=23.27%, 250=5.18%, 500=0.07%, 750=0.03% cpu : usr=0.08%, sys=5.18%, ctx=6224, 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=145037: Sat Sep 5 18:23:38 2026 read: IOPS=12, BW=50.2KiB/s (51.4kB/s)(5940KiB/118435msec) clat (usec): min=26, max=717800, avg=37589.22, stdev=34567.42 lat (usec): min=27, max=717803, avg=37591.12, stdev=34567.22 clat percentiles (usec): | 1.00th=[ 42], 5.00th=[ 55], 10.00th=[ 64], 20.00th=[ 15401], | 30.00th=[ 20579], 40.00th=[ 25560], 50.00th=[ 31065], 60.00th=[ 38011], | 70.00th=[ 45351], 80.00th=[ 57410], 90.00th=[ 77071], 95.00th=[ 90702], | 99.00th=[128451], 99.50th=[154141], 99.90th=[362808], 99.95th=[717226], | 99.99th=[717226] bw ( KiB/s): min= 7, max= 181, per=24.70%, avg=49.90, stdev=22.50, samples=233 iops : min= 1, max= 45, avg=11.84, stdev= 5.67, samples=233 write: IOPS=13, BW=53.6KiB/s (54.9kB/s)(6348KiB/118435msec); 0 zone resets clat (usec): min=637, max=270874, avg=39369.82, stdev=39193.56 lat (usec): min=637, max=270874, avg=39372.97, stdev=39192.33 clat percentiles (usec): | 1.00th=[ 996], 5.00th=[ 1172], 10.00th=[ 1369], 20.00th=[ 3359], | 30.00th=[ 7701], 40.00th=[ 19792], 50.00th=[ 30278], 60.00th=[ 41157], | 70.00th=[ 53216], 80.00th=[ 69731], 90.00th=[ 92799], 95.00th=[113771], | 99.00th=[162530], 99.50th=[183501], 99.90th=[267387], 99.95th=[270533], | 99.99th=[270533] bw ( KiB/s): min= 7, max= 158, per=25.40%, avg=53.84, stdev=22.51, samples=231 iops : min= 1, max= 39, avg=12.83, stdev= 5.66, samples=231 lat (usec) : 50=1.40%, 100=4.26%, 250=0.26%, 500=0.16%, 750=0.10% lat (usec) : 1000=0.52% lat (msec) : 2=6.74%, 4=4.52%, 10=5.83%, 20=10.64%, 50=35.97% lat (msec) : 100=23.76%, 250=5.70%, 500=0.10%, 750=0.03% cpu : usr=0.07%, sys=5.11%, ctx=6440, 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=145038: Sat Sep 5 18:23:38 2026 read: IOPS=12, BW=51.1KiB/s (52.4kB/s)(6028KiB/117866msec) clat (usec): min=27, max=218636, avg=35232.63, stdev=27953.61 lat (usec): min=27, max=218637, avg=35237.82, stdev=27953.61 clat percentiles (usec): | 1.00th=[ 38], 5.00th=[ 55], 10.00th=[ 62], 20.00th=[ 14746], | 30.00th=[ 20055], 40.00th=[ 24773], 50.00th=[ 29754], 60.00th=[ 35390], | 70.00th=[ 43779], 80.00th=[ 55837], 90.00th=[ 69731], 95.00th=[ 83362], | 99.00th=[123208], 99.50th=[147850], 99.90th=[206570], 99.95th=[219153], | 99.99th=[219153] bw ( KiB/s): min= 7, max= 144, per=25.19%, avg=50.89, stdev=22.80, samples=231 iops : min= 1, max= 36, avg=12.07, stdev= 5.74, samples=231 write: IOPS=13, BW=53.1KiB/s (54.4kB/s)(6260KiB/117866msec); 0 zone resets clat (usec): min=647, max=799527, avg=41292.59, stdev=44341.13 lat (usec): min=648, max=799529, avg=41299.24, stdev=44343.72 clat percentiles (usec): | 1.00th=[ 996], 5.00th=[ 1123], 10.00th=[ 1303], 20.00th=[ 3064], | 30.00th=[ 8979], 40.00th=[ 21627], 50.00th=[ 31851], 60.00th=[ 43779], | 70.00th=[ 55837], 80.00th=[ 70779], 90.00th=[ 94897], 95.00th=[114820], | 99.00th=[160433], 99.50th=[191890], 99.90th=[446694], 99.95th=[801113], | 99.99th=[801113] bw ( KiB/s): min= 15, max= 128, per=24.84%, avg=52.66, stdev=21.60, samples=231 iops : min= 3, max= 32, avg=12.54, stdev= 5.43, samples=231 lat (usec) : 50=1.33%, 100=4.85%, 250=0.26%, 500=0.10%, 750=0.13% lat (usec) : 1000=0.52% lat (msec) : 2=7.26%, 4=3.58%, 10=5.21%, 20=11.23%, 50=35.61% lat (msec) : 100=23.99%, 250=5.86%, 500=0.03%, 1000=0.03% cpu : usr=0.07%, sys=4.93%, ctx=6364, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145040: Sat Sep 5 18:23:38 2026 read: IOPS=12, BW=51.9KiB/s (53.2kB/s)(6052KiB/116532msec) clat (usec): min=31, max=241725, avg=35299.46, stdev=27634.79 lat (usec): min=32, max=241726, avg=35302.59, stdev=27638.76 clat percentiles (usec): | 1.00th=[ 39], 5.00th=[ 56], 10.00th=[ 68], 20.00th=[ 14877], | 30.00th=[ 20317], 40.00th=[ 25035], 50.00th=[ 30016], 60.00th=[ 35390], | 70.00th=[ 43254], 80.00th=[ 54264], 90.00th=[ 71828], 95.00th=[ 85459], | 99.00th=[119014], 99.50th=[145753], 99.90th=[206570], 99.95th=[242222], | 99.99th=[242222] bw ( KiB/s): min= 7, max= 119, per=25.83%, avg=52.19, stdev=21.53, samples=227 iops : min= 1, max= 29, avg=12.41, stdev= 5.43, samples=227 write: IOPS=13, BW=53.5KiB/s (54.8kB/s)(6236KiB/116532msec); 0 zone resets clat (usec): min=893, max=810610, avg=40395.58, stdev=45643.42 lat (usec): min=894, max=810612, avg=40402.52, stdev=45644.91 clat percentiles (usec): | 1.00th=[ 1020], 5.00th=[ 1139], 10.00th=[ 1336], 20.00th=[ 3195], | 30.00th=[ 7635], 40.00th=[ 18220], 50.00th=[ 29492], 60.00th=[ 40633], | 70.00th=[ 53216], 80.00th=[ 70779], 90.00th=[ 93848], 95.00th=[117965], | 99.00th=[179307], 99.50th=[204473], 99.90th=[463471], 99.95th=[809501], | 99.99th=[809501] bw ( KiB/s): min= 7, max= 127, per=25.14%, avg=53.29, stdev=21.20, samples=229 iops : min= 1, max= 31, avg=12.69, stdev= 5.36, samples=229 lat (usec) : 50=1.14%, 100=4.69%, 250=0.39%, 500=0.16%, 750=0.03% lat (usec) : 1000=0.39% lat (msec) : 2=7.49%, 4=3.78%, 10=5.57%, 20=11.62%, 50=37.04% lat (msec) : 100=22.20%, 250=5.40%, 500=0.07%, 1000=0.03% cpu : usr=0.08%, sys=5.06%, ctx=6332, 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=203KiB/s (208kB/s), 50.2KiB/s-52.7KiB/s (51.4kB/s-53.9kB/s), io=23.4MiB (24.6MB), run=113802-118435msec WRITE: bw=212KiB/s (217kB/s), 53.1KiB/s-55.3KiB/s (54.4kB/s-56.7kB/s), io=24.6MiB (25.7MB), run=113802-118435msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145031: Sat Sep 5 18:25:49 2026 read: IOPS=5, BW=23.0KiB/s (24.6kB/s)(5992KiB/249692msec) clat (msec): min=4, max=609, avg=31.83, stdev=36.82 lat (msec): min=4, max=609, avg=31.83, stdev=36.82 clat percentiles (msec): | 1.00th=[ 6], 5.00th=[ 9], 10.00th=[ 10], 20.00th=[ 12], | 30.00th=[ 15], 40.00th=[ 18], 50.00th=[ 21], 60.00th=[ 26], | 70.00th=[ 32], 80.00th=[ 44], 90.00th=[ 67], 95.00th=[ 88], | 99.00th=[ 171], 99.50th=[ 215], 99.90th=[ 498], 99.95th=[ 609], | 99.99th=[ 609] bw ( KiB/s): min= 7, max= 103, per=27.46%, avg=26.36, stdev=18.57, samples=439 iops : min= 1, max= 25, avg= 5.98, stdev= 4.70, samples=439 write: IOPS=6, BW=25.2KiB/s (25.8kB/s)(6296KiB/249692msec); 0 zone resets clat (msec): min=28, max=487, avg=128.09, stdev=59.71 lat (msec): min=28, max=487, avg=128.09, stdev=59.71 clat percentiles (msec): | 1.00th=[ 42], 5.00th=[ 54], 10.00th=[ 64], 20.00th=[ 79], | 30.00th=[ 92], 40.00th=[ 105], 50.00th=[ 117], 60.00th=[ 132], | 70.00th=[ 148], 80.00th=[ 169], 90.00th=[ 207], 95.00th=[ 243], | 99.00th=[ 317], 99.50th=[ 355], 99.90th=[ 418], 99.95th=[ 489], | 99.99th=[ 489] bw ( KiB/s): min= 7, max= 63, per=24.88%, avg=24.88, stdev=11.11, samples=487 iops : min= 1, max= 15, avg= 5.61, stdev= 2.86, samples=487 lat (msec) : 10=5.92%, 20=17.06%, 50=19.76%, 100=22.88%, 250=31.87% lat (msec) : 500=2.47%, 750=0.03% cpu : usr=0.03%, sys=1.08%, ctx=5059, 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=145032: Sat Sep 5 18:25:49 2026 read: IOPS=5, BW=23.9KiB/s (24.5kB/s)(5940KiB/248379msec) clat (msec): min=4, max=728, avg=33.21, stdev=40.02 lat (msec): min=4, max=728, avg=33.21, stdev=40.02 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 10], 20.00th=[ 13], | 30.00th=[ 16], 40.00th=[ 18], 50.00th=[ 22], 60.00th=[ 27], | 70.00th=[ 34], 80.00th=[ 45], 90.00th=[ 69], 95.00th=[ 93], | 99.00th=[ 186], 99.50th=[ 253], 99.90th=[ 493], 99.95th=[ 726], | 99.99th=[ 726] bw ( KiB/s): min= 7, max= 96, per=27.89%, avg=26.77, stdev=17.22, samples=430 iops : min= 1, max= 24, avg= 6.08, stdev= 4.36, samples=430 write: IOPS=6, BW=25.6KiB/s (26.2kB/s)(6348KiB/248379msec); 0 zone resets clat (msec): min=26, max=477, avg=125.17, stdev=57.24 lat (msec): min=26, max=477, avg=125.18, stdev=57.24 clat percentiles (msec): | 1.00th=[ 43], 5.00th=[ 53], 10.00th=[ 64], 20.00th=[ 77], | 30.00th=[ 90], 40.00th=[ 103], 50.00th=[ 115], 60.00th=[ 129], | 70.00th=[ 144], 80.00th=[ 169], 90.00th=[ 201], 95.00th=[ 232], | 99.00th=[ 309], 99.50th=[ 342], 99.90th=[ 405], 99.95th=[ 477], | 99.99th=[ 477] bw ( KiB/s): min= 7, max= 72, per=25.43%, avg=25.43, stdev=11.43, samples=483 iops : min= 1, max= 18, avg= 5.74, stdev= 2.94, samples=483 lat (msec) : 10=5.53%, 20=16.80%, 50=19.76%, 100=23.99%, 250=31.93% lat (msec) : 500=1.95%, 750=0.03% cpu : usr=0.04%, sys=1.09%, ctx=5056, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1485,1587,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145033: Sat Sep 5 18:25:49 2026 read: IOPS=6, BW=24.2KiB/s (24.8kB/s)(6028KiB/248642msec) clat (msec): min=4, max=297, avg=33.27, stdev=32.31 lat (msec): min=4, max=297, avg=33.27, stdev=32.31 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 13], | 30.00th=[ 16], 40.00th=[ 19], 50.00th=[ 22], 60.00th=[ 27], | 70.00th=[ 33], 80.00th=[ 47], 90.00th=[ 75], 95.00th=[ 99], | 99.00th=[ 155], 99.50th=[ 186], 99.90th=[ 292], 99.95th=[ 296], | 99.99th=[ 296] bw ( KiB/s): min= 7, max= 103, per=26.92%, avg=25.84, stdev=17.96, samples=451 iops : min= 1, max= 25, avg= 5.85, stdev= 4.55, samples=451 write: IOPS=6, BW=25.2KiB/s (25.8kB/s)(6260KiB/248642msec); 0 zone resets clat (msec): min=29, max=824, avg=126.57, stdev=63.23 lat (msec): min=29, max=824, avg=126.57, stdev=63.23 clat percentiles (msec): | 1.00th=[ 41], 5.00th=[ 54], 10.00th=[ 64], 20.00th=[ 77], | 30.00th=[ 88], 40.00th=[ 101], 50.00th=[ 113], 60.00th=[ 127], | 70.00th=[ 146], 80.00th=[ 169], 90.00th=[ 205], 95.00th=[ 245], | 99.00th=[ 334], 99.50th=[ 372], 99.90th=[ 502], 99.95th=[ 827], | 99.99th=[ 827] bw ( KiB/s): min= 7, max= 64, per=24.74%, avg=24.74, stdev=11.87, samples=488 iops : min= 1, max= 16, avg= 5.57, stdev= 3.06, samples=488 lat (msec) : 10=4.92%, 20=17.29%, 50=19.60%, 100=25.00%, 250=30.79% lat (msec) : 500=2.34%, 750=0.03%, 1000=0.03% cpu : usr=0.04%, sys=1.10%, ctx=4932, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145034: Sat Sep 5 18:25:49 2026 read: IOPS=6, BW=24.4KiB/s (24.0kB/s)(6052KiB/248329msec) clat (msec): min=4, max=366, avg=32.65, stdev=33.51 lat (msec): min=4, max=366, avg=32.66, stdev=33.51 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 8], 10.00th=[ 10], 20.00th=[ 13], | 30.00th=[ 15], 40.00th=[ 18], 50.00th=[ 21], 60.00th=[ 26], | 70.00th=[ 32], 80.00th=[ 47], 90.00th=[ 77], 95.00th=[ 100], | 99.00th=[ 155], 99.50th=[ 188], 99.90th=[ 347], 99.95th=[ 368], | 99.99th=[ 368] bw ( KiB/s): min= 7, max= 112, per=28.15%, avg=27.02, stdev=18.64, samples=434 iops : min= 1, max= 28, avg= 6.15, stdev= 4.70, samples=434 write: IOPS=6, BW=25.1KiB/s (25.7kB/s)(6236KiB/248329msec); 0 zone resets clat (msec): min=29, max=825, avg=127.33, stdev=62.43 lat (msec): min=29, max=825, avg=127.33, stdev=62.43 clat percentiles (msec): | 1.00th=[ 43], 5.00th=[ 56], 10.00th=[ 64], 20.00th=[ 78], | 30.00th=[ 89], 40.00th=[ 102], 50.00th=[ 115], 60.00th=[ 129], | 70.00th=[ 146], 80.00th=[ 171], 90.00th=[ 207], 95.00th=[ 245], | 99.00th=[ 317], 99.50th=[ 363], 99.90th=[ 489], 99.95th=[ 827], | 99.99th=[ 827] bw ( KiB/s): min= 7, max= 64, per=24.58%, avg=24.58, stdev=11.48, samples=489 iops : min= 1, max= 16, avg= 5.53, stdev= 2.94, samples=489 lat (msec) : 10=5.60%, 20=18.26%, 50=17.58%, 100=25.26%, 250=30.89% lat (msec) : 500=2.38%, 1000=0.03% cpu : usr=0.04%, sys=1.08%, ctx=5054, 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=96.2KiB/s (98.5kB/s), 23.9KiB/s-24.4KiB/s (24.5kB/s-24.0kB/s), io=23.4MiB (24.6MB), run=248329-249692msec WRITE: bw=101KiB/s (103kB/s), 25.1KiB/s-25.6KiB/s (25.7kB/s-26.2kB/s), io=24.6MiB (25.7MB), run=248329-249692msec 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=145087: Sat Sep 5 18:26:28 2026 read: IOPS=12, BW=198KiB/s (203kB/s)(5920KiB/29851msec) clat (usec): min=25, max=186065, avg=43605.49, stdev=36981.38 lat (usec): min=25, max=186066, avg=43623.54, stdev=37006.79 clat percentiles (usec): | 1.00th=[ 36], 5.00th=[ 51], 10.00th=[ 62], 20.00th=[ 182], | 30.00th=[ 23200], 40.00th=[ 30016], 50.00th=[ 36963], 60.00th=[ 45351], | 70.00th=[ 56361], 80.00th=[ 73925], 90.00th=[ 90702], 95.00th=[108528], | 99.00th=[170918], 99.50th=[185598], 99.90th=[185598], 99.95th=[185598], | 99.99th=[185598] bw ( KiB/s): min= 63, max= 380, per=25.11%, avg=194.36, stdev=70.30, samples=58 iops : min= 3, max= 23, avg=11.40, stdev= 4.50, samples=58 write: IOPS=13, BW=213KiB/s (218kB/s)(6368KiB/29851msec); 0 zone resets clat (usec): min=1199, max=199454, avg=33955.23, stdev=36562.59 lat (usec): min=1199, max=199456, avg=33958.70, stdev=36563.46 clat percentiles (usec): | 1.00th=[ 1450], 5.00th=[ 1663], 10.00th=[ 2040], 20.00th=[ 3949], | 30.00th=[ 6980], 40.00th=[ 11731], 50.00th=[ 20317], 60.00th=[ 31589], | 70.00th=[ 43254], 80.00th=[ 59507], 90.00th=[ 84411], 95.00th=[113771], | 99.00th=[152044], 99.50th=[162530], 99.90th=[200279], 99.95th=[200279], | 99.99th=[200279] bw ( KiB/s): min= 31, max= 480, per=25.97%, avg=211.41, stdev=92.06, samples=58 iops : min= 1, max= 30, avg=12.48, stdev= 5.90, samples=58 lat (usec) : 50=2.21%, 100=6.77%, 250=0.65%, 500=0.13%, 1000=0.39% lat (msec) : 2=5.21%, 4=5.47%, 10=8.20%, 20=9.51%, 50=30.47% lat (msec) : 100=23.57%, 250=7.42% cpu : usr=0.08%, sys=5.11%, ctx=1382, 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=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=145088: Sat Sep 5 18:26:28 2026 read: IOPS=11, BW=186KiB/s (190kB/s)(5744KiB/30926msec) clat (usec): min=32, max=210468, avg=43362.19, stdev=34812.14 lat (usec): min=33, max=210470, avg=43363.87, stdev=34812.09 clat percentiles (usec): | 1.00th=[ 40], 5.00th=[ 53], 10.00th=[ 61], 20.00th=[ 12780], | 30.00th=[ 24249], 40.00th=[ 31589], 50.00th=[ 39060], 60.00th=[ 47973], | 70.00th=[ 56361], 80.00th=[ 67634], 90.00th=[ 87557], 95.00th=[110625], | 99.00th=[154141], 99.50th=[173016], 99.90th=[210764], 99.95th=[210764], | 99.99th=[210764] bw ( KiB/s): min= 31, max= 448, per=23.98%, avg=185.64, stdev=85.55, samples=61 iops : min= 1, max= 28, avg=10.85, stdev= 5.48, samples=61 write: IOPS=13, BW=212KiB/s (217kB/s)(6544KiB/30926msec); 0 zone resets clat (usec): min=1362, max=272194, avg=37386.09, stdev=42585.41 lat (usec): min=1364, max=272195, avg=37388.23, stdev=42585.39 clat percentiles (usec): | 1.00th=[ 1450], 5.00th=[ 1663], 10.00th=[ 2114], 20.00th=[ 4817], | 30.00th=[ 8455], 40.00th=[ 11731], 50.00th=[ 18482], 60.00th=[ 33817], | 70.00th=[ 46924], 80.00th=[ 64750], 90.00th=[ 99091], 95.00th=[123208], | 99.00th=[170918], 99.50th=[198181], 99.90th=[270533], 99.95th=[270533], | 99.99th=[270533] bw ( KiB/s): min= 31, max= 615, per=25.90%, avg=210.80, stdev=109.09, samples=61 iops : min= 1, max= 38, avg=12.44, stdev= 6.94, samples=61 lat (usec) : 50=1.43%, 100=6.77%, 250=0.13%, 500=0.13%, 750=0.13% lat (msec) : 2=5.08%, 4=3.91%, 10=9.77%, 20=11.85%, 50=28.39% lat (msec) : 100=23.70%, 250=8.46%, 500=0.26% cpu : usr=0.07%, sys=4.75%, ctx=1404, 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=145089: Sat Sep 5 18:26:28 2026 read: IOPS=13, BW=210KiB/s (215kB/s)(6256KiB/29785msec) clat (usec): min=29, max=395160, avg=41785.50, stdev=39058.63 lat (usec): min=30, max=395161, avg=41786.92, stdev=39058.59 clat percentiles (usec): | 1.00th=[ 43], 5.00th=[ 58], 10.00th=[ 65], 20.00th=[ 100], | 30.00th=[ 20841], 40.00th=[ 28705], 50.00th=[ 36439], 60.00th=[ 46924], | 70.00th=[ 54789], 80.00th=[ 65274], 90.00th=[ 83362], 95.00th=[106431], | 99.00th=[160433], 99.50th=[202376], 99.90th=[396362], 99.95th=[396362], | 99.99th=[396362] bw ( KiB/s): min= 31, max= 411, per=27.29%, avg=211.24, stdev=87.67, samples=58 iops : min= 1, max= 25, avg=12.47, stdev= 5.53, samples=58 write: IOPS=12, BW=203KiB/s (207kB/s)(6032KiB/29785msec); 0 zone resets clat (usec): min=1168, max=245288, avg=35073.15, stdev=37410.95 lat (usec): min=1169, max=245289, avg=35102.28, stdev=37432.31 clat percentiles (usec): | 1.00th=[ 1369], 5.00th=[ 1614], 10.00th=[ 1778], 20.00th=[ 4359], | 30.00th=[ 7308], 40.00th=[ 12780], 50.00th=[ 24249], 60.00th=[ 32637], | 70.00th=[ 45351], 80.00th=[ 62653], 90.00th=[ 84411], 95.00th=[116917], | 99.00th=[156238], 99.50th=[177210], 99.90th=[244319], 99.95th=[244319], | 99.99th=[244319] bw ( KiB/s): min= 94, max= 416, per=25.05%, avg=203.88, stdev=81.29, samples=57 iops : min= 5, max= 26, avg=12.02, stdev= 5.20, samples=57 lat (usec) : 50=0.91%, 100=9.38%, 250=1.04%, 500=0.13% lat (msec) : 2=6.12%, 4=3.12%, 10=8.72%, 20=8.33%, 50=30.47% lat (msec) : 100=25.78%, 250=5.86%, 500=0.13% cpu : usr=0.06%, sys=4.53%, ctx=1385, 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=145090: Sat Sep 5 18:26:28 2026 read: IOPS=12, BW=203KiB/s (208kB/s)(6032KiB/29678msec) clat (usec): min=38, max=331943, avg=43397.48, stdev=37579.40 lat (usec): min=38, max=331945, avg=43398.89, stdev=37579.41 clat percentiles (usec): | 1.00th=[ 45], 5.00th=[ 56], 10.00th=[ 61], 20.00th=[ 1450], | 30.00th=[ 23462], 40.00th=[ 32900], 50.00th=[ 39060], 60.00th=[ 46400], | 70.00th=[ 56361], 80.00th=[ 69731], 90.00th=[ 86508], 95.00th=[104334], | 99.00th=[170918], 99.50th=[229639], 99.90th=[333448], 99.95th=[333448], | 99.99th=[333448] bw ( KiB/s): min= 62, max= 444, per=26.07%, avg=201.78, stdev=78.25, samples=58 iops : min= 3, max= 27, avg=11.86, stdev= 4.99, samples=58 write: IOPS=13, BW=211KiB/s (216kB/s)(6256KiB/29678msec); 0 zone resets clat (usec): min=1160, max=250730, avg=33435.88, stdev=38723.96 lat (usec): min=1161, max=250732, avg=33437.94, stdev=38724.02 clat percentiles (usec): | 1.00th=[ 1319], 5.00th=[ 1565], 10.00th=[ 1795], 20.00th=[ 4359], | 30.00th=[ 6849], 40.00th=[ 10290], 50.00th=[ 16581], 60.00th=[ 28443], | 70.00th=[ 42206], 80.00th=[ 60031], 90.00th=[ 86508], 95.00th=[110625], | 99.00th=[158335], 99.50th=[233833], 99.90th=[250610], 99.95th=[250610], | 99.99th=[250610] bw ( KiB/s): min= 63, max= 461, per=26.27%, avg=213.82, stdev=97.53, samples=57 iops : min= 3, max= 28, avg=12.63, stdev= 6.16, samples=57 lat (usec) : 50=1.04%, 100=7.68%, 250=0.39%, 500=0.26%, 750=0.13% lat (usec) : 1000=0.13% lat (msec) : 2=6.38%, 4=4.04%, 10=10.16%, 20=8.98%, 50=30.34% lat (msec) : 100=24.09%, 250=6.12%, 500=0.26% cpu : usr=0.06%, sys=4.77%, ctx=1403, 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=774KiB/s (793kB/s), 186KiB/s-210KiB/s (190kB/s-215kB/s), io=23.4MiB (24.5MB), run=29678-30926msec WRITE: bw=815KiB/s (834kB/s), 203KiB/s-213KiB/s (207kB/s-218kB/s), io=24.6MiB (25.8MB), run=29678-30926msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145092: Sat Sep 5 18:26:59 2026 read: IOPS=6, BW=97.4KiB/s (99.8kB/s)(5920KiB/60771msec) clat (msec): min=6, max=342, avg=36.99, stdev=44.75 lat (msec): min=6, max=342, avg=36.99, stdev=44.75 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 9], 10.00th=[ 10], 20.00th=[ 13], | 30.00th=[ 15], 40.00th=[ 19], 50.00th=[ 22], 60.00th=[ 26], | 70.00th=[ 31], 80.00th=[ 48], 90.00th=[ 84], 95.00th=[ 131], | 99.00th=[ 234], 99.50th=[ 275], 99.90th=[ 342], 99.95th=[ 342], | 99.99th=[ 342] bw ( KiB/s): min= 30, max= 479, per=27.56%, avg=107.21, stdev=75.64, samples=107 iops : min= 1, max= 29, avg= 5.99, stdev= 4.85, samples=107 write: IOPS=6, BW=105KiB/s (107kB/s)(6368KiB/60771msec); 0 zone resets clat (msec): min=31, max=462, avg=118.10, stdev=69.72 lat (msec): min=31, max=462, avg=118.11, stdev=69.72 clat percentiles (msec): | 1.00th=[ 41], 5.00th=[ 49], 10.00th=[ 58], 20.00th=[ 67], | 30.00th=[ 78], 40.00th=[ 88], 50.00th=[ 97], 60.00th=[ 111], | 70.00th=[ 129], 80.00th=[ 155], 90.00th=[ 203], 95.00th=[ 266], | 99.00th=[ 384], 99.50th=[ 451], 99.90th=[ 464], 99.95th=[ 464], | 99.99th=[ 464] bw ( KiB/s): min= 22, max= 224, per=26.18%, avg=107.33, stdev=54.70, samples=116 iops : min= 1, max= 14, avg= 5.99, stdev= 3.55, samples=116 lat (msec) : 10=6.12%, 20=15.63%, 50=20.57%, 100=29.30%, 250=24.87% lat (msec) : 500=3.52% cpu : usr=0.04%, sys=1.26%, ctx=1249, 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=145093: Sat Sep 5 18:26:59 2026 read: IOPS=5, BW=93.5KiB/s (95.8kB/s)(5744KiB/61419msec) clat (msec): min=5, max=326, avg=37.46, stdev=44.76 lat (msec): min=5, max=326, avg=37.47, stdev=44.76 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 13], | 30.00th=[ 16], 40.00th=[ 18], 50.00th=[ 22], 60.00th=[ 28], | 70.00th=[ 36], 80.00th=[ 51], 90.00th=[ 89], 95.00th=[ 105], | 99.00th=[ 279], 99.50th=[ 309], 99.90th=[ 326], 99.95th=[ 326], | 99.99th=[ 326] bw ( KiB/s): min= 23, max= 352, per=27.22%, avg=105.89, stdev=71.59, samples=106 iops : min= 1, max= 22, avg= 5.91, stdev= 4.60, samples=106 write: IOPS=6, BW=107KiB/s (109kB/s)(6544KiB/61419msec); 0 zone resets clat (msec): min=29, max=597, avg=117.18, stdev=75.95 lat (msec): min=29, max=597, avg=117.18, stdev=75.95 clat percentiles (msec): | 1.00th=[ 39], 5.00th=[ 47], 10.00th=[ 54], 20.00th=[ 65], | 30.00th=[ 73], 40.00th=[ 84], 50.00th=[ 95], 60.00th=[ 107], | 70.00th=[ 122], 80.00th=[ 159], 90.00th=[ 230], 95.00th=[ 262], | 99.00th=[ 418], 99.50th=[ 430], 99.90th=[ 600], 99.95th=[ 600], | 99.99th=[ 600] bw ( KiB/s): min= 30, max= 320, per=26.58%, avg=108.97, stdev=58.94, samples=118 iops : min= 1, max= 20, avg= 6.09, stdev= 3.86, samples=118 lat (msec) : 10=4.17%, 20=17.06%, 50=20.05%, 100=32.03%, 250=22.79% lat (msec) : 500=3.78%, 750=0.13% cpu : usr=0.04%, sys=1.23%, ctx=1342, 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=145094: Sat Sep 5 18:26:59 2026 read: IOPS=6, BW=107KiB/s (109kB/s)(6256KiB/58536msec) clat (msec): min=5, max=346, avg=35.20, stdev=40.86 lat (msec): min=5, max=346, avg=35.21, stdev=40.86 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 16], 40.00th=[ 20], 50.00th=[ 23], 60.00th=[ 27], | 70.00th=[ 33], 80.00th=[ 47], 90.00th=[ 72], 95.00th=[ 104], | 99.00th=[ 279], 99.50th=[ 288], 99.90th=[ 347], 99.95th=[ 347], | 99.99th=[ 347] bw ( KiB/s): min= 30, max= 380, per=29.96%, avg=116.53, stdev=85.45, samples=106 iops : min= 1, max= 23, avg= 6.57, stdev= 5.44, samples=106 write: IOPS=6, BW=103KiB/s (106kB/s)(6032KiB/58536msec); 0 zone resets clat (msec): min=33, max=457, avg=118.56, stdev=69.38 lat (msec): min=33, max=457, avg=118.57, stdev=69.38 clat percentiles (msec): | 1.00th=[ 40], 5.00th=[ 48], 10.00th=[ 57], 20.00th=[ 70], | 30.00th=[ 80], 40.00th=[ 86], 50.00th=[ 101], 60.00th=[ 109], | 70.00th=[ 132], 80.00th=[ 157], 90.00th=[ 211], 95.00th=[ 271], | 99.00th=[ 363], 99.50th=[ 372], 99.90th=[ 460], 99.95th=[ 460], | 99.99th=[ 460] bw ( KiB/s): min= 31, max= 224, per=25.68%, avg=105.30, stdev=52.70, samples=112 iops : min= 1, max= 14, avg= 5.86, stdev= 3.43, samples=112 lat (msec) : 10=4.69%, 20=17.06%, 50=23.18%, 100=27.99%, 250=23.44% lat (msec) : 500=3.65% cpu : usr=0.05%, sys=1.26%, ctx=1351, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145095: Sat Sep 5 18:26:59 2026 read: IOPS=6, BW=99.5KiB/s (102kB/s)(6032KiB/60608msec) clat (msec): min=6, max=246, avg=33.89, stdev=34.85 lat (msec): min=6, max=246, avg=33.89, stdev=34.85 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 10], 20.00th=[ 12], | 30.00th=[ 15], 40.00th=[ 17], 50.00th=[ 21], 60.00th=[ 25], | 70.00th=[ 33], 80.00th=[ 47], 90.00th=[ 84], 95.00th=[ 107], | 99.00th=[ 167], 99.50th=[ 199], 99.90th=[ 247], 99.95th=[ 247], | 99.99th=[ 247] bw ( KiB/s): min= 31, max= 351, per=28.46%, avg=110.72, stdev=73.43, samples=106 iops : min= 1, max= 21, avg= 6.21, stdev= 4.66, samples=106 write: IOPS=6, BW=103KiB/s (106kB/s)(6256KiB/60608msec); 0 zone resets clat (msec): min=34, max=449, avg=122.09, stdev=71.27 lat (msec): min=34, max=449, avg=122.09, stdev=71.27 clat percentiles (msec): | 1.00th=[ 40], 5.00th=[ 52], 10.00th=[ 61], 20.00th=[ 69], | 30.00th=[ 80], 40.00th=[ 89], 50.00th=[ 101], 60.00th=[ 111], | 70.00th=[ 134], 80.00th=[ 165], 90.00th=[ 232], 95.00th=[ 279], | 99.00th=[ 388], 99.50th=[ 430], 99.90th=[ 451], 99.95th=[ 451], | 99.99th=[ 451] bw ( KiB/s): min= 31, max= 224, per=25.24%, avg=103.49, stdev=54.30, samples=118 iops : min= 1, max= 14, avg= 5.75, stdev= 3.54, samples=118 lat (msec) : 10=6.12%, 20=18.36%, 50=17.45%, 100=29.82%, 250=24.22% lat (msec) : 500=4.04% cpu : usr=0.04%, sys=1.27%, ctx=1344, 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=390KiB/s (399kB/s), 93.5KiB/s-107KiB/s (95.8kB/s-109kB/s), io=23.4MiB (24.5MB), run=58536-61419msec WRITE: bw=410KiB/s (420kB/s), 103KiB/s-107KiB/s (106kB/s-109kB/s), io=24.6MiB (25.8MB), run=58536-61419msec 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=145110: Sat Sep 5 18:27:17 2026 read: IOPS=1, BW=1220KiB/s (1250kB/s)(7168KiB/5874msec) clat (msec): min=168, max=393, avg=280.35, stdev=95.83 lat (msec): min=168, max=393, avg=280.36, stdev=95.83 clat percentiles (msec): | 1.00th=[ 169], 5.00th=[ 169], 10.00th=[ 169], 20.00th=[ 176], | 30.00th=[ 215], 40.00th=[ 215], 50.00th=[ 309], 60.00th=[ 313], | 70.00th=[ 313], 80.00th=[ 393], 90.00th=[ 393], 95.00th=[ 393], | 99.00th=[ 393], 99.50th=[ 393], 99.90th=[ 393], 99.95th=[ 393], | 99.99th=[ 393] bw ( KiB/s): min= 1921, max= 4219, per=100.00%, avg=2545.50, stdev=1116.66, samples=4 iops : min= 1, max= 4, avg= 1.75, stdev= 1.50, samples=4 write: IOPS=0, BW=872KiB/s (893kB/s)(5120KiB/5874msec); 0 zone resets clat (msec): min=160, max=2565, avg=775.63, stdev=1012.68 lat (msec): min=160, max=2565, avg=775.71, stdev=1012.69 clat percentiles (msec): | 1.00th=[ 161], 5.00th=[ 161], 10.00th=[ 161], 20.00th=[ 161], | 30.00th=[ 247], 40.00th=[ 247], 50.00th=[ 330], 60.00th=[ 330], | 70.00th=[ 584], 80.00th=[ 584], 90.00th=[ 2567], 95.00th=[ 2567], | 99.00th=[ 2567], 99.50th=[ 2567], 99.90th=[ 2567], 99.95th=[ 2567], | 99.99th=[ 2567] bw ( KiB/s): min= 1980, max= 2035, per=61.38%, avg=2012.80, stdev=20.89, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 lat (msec) : 250=41.67%, 500=41.67%, 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=10.22%, ctx=253, 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=145111: Sat Sep 5 18:27:17 2026 read: IOPS=0, BW=234KiB/s (240kB/s)(2048KiB/8742msec) clat (msec): min=21, max=2719, avg=1370.50, stdev=1907.33 lat (msec): min=21, max=2719, avg=1370.51, stdev=1907.33 clat percentiles (msec): | 1.00th=[ 22], 5.00th=[ 22], 10.00th=[ 22], 20.00th=[ 22], | 30.00th=[ 22], 40.00th=[ 22], 50.00th=[ 22], 60.00th=[ 2735], | 70.00th=[ 2735], 80.00th=[ 2735], 90.00th=[ 2735], 95.00th=[ 2735], | 99.00th=[ 2735], 99.50th=[ 2735], 99.90th=[ 2735], 99.95th=[ 2735], | 99.99th=[ 2735] bw ( KiB/s): min= 2007, max= 2019, per=85.95%, avg=2013.00, stdev= 8.49, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1171KiB/s (1199kB/s)(10.0MiB/8742msec); 0 zone resets clat (msec): min=68, max=2867, avg=586.19, stdev=850.36 lat (msec): min=68, max=2867, avg=586.29, stdev=850.37 clat percentiles (msec): | 1.00th=[ 68], 5.00th=[ 68], 10.00th=[ 68], 20.00th=[ 99], | 30.00th=[ 111], 40.00th=[ 178], 50.00th=[ 209], 60.00th=[ 309], | 70.00th=[ 460], 80.00th=[ 558], 90.00th=[ 1003], 95.00th=[ 2869], | 99.00th=[ 2869], 99.50th=[ 2869], 99.90th=[ 2869], 99.95th=[ 2869], | 99.99th=[ 2869] bw ( KiB/s): min= 1980, max= 4071, per=86.17%, avg=2825.60, stdev=1126.07, samples=5 iops : min= 1, max= 3, avg= 1.80, stdev= 1.10, samples=5 lat (msec) : 50=8.33%, 100=16.67%, 250=25.00%, 500=16.67%, 750=8.33% lat (msec) : 1000=8.33%, >=2000=16.67% cpu : usr=0.00%, sys=7.77%, ctx=655, 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=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=145112: Sat Sep 5 18:27:17 2026 read: IOPS=0, BW=1016KiB/s (1040kB/s)(6144KiB/6048msec) clat (usec): min=791, max=350264, avg=190877.14, stdev=156436.08 lat (usec): min=792, max=350266, avg=190878.59, stdev=156436.35 clat percentiles (usec): | 1.00th=[ 791], 5.00th=[ 791], 10.00th=[ 791], 20.00th=[ 1631], | 30.00th=[ 1631], 40.00th=[208667], 50.00th=[208667], 60.00th=[246416], | 70.00th=[337642], 80.00th=[337642], 90.00th=[350225], 95.00th=[350225], | 99.00th=[350225], 99.50th=[350225], 99.90th=[350225], 99.95th=[350225], | 99.99th=[350225] bw ( KiB/s): min= 2035, max= 4047, per=100.00%, avg=3373.67, stdev=1159.33, samples=3 iops : min= 1, max= 3, avg= 2.33, stdev= 1.15, samples=3 write: IOPS=0, BW=1016KiB/s (1040kB/s)(6144KiB/6048msec); 0 zone resets clat (msec): min=116, max=2949, avg=788.36, stdev=1068.86 lat (msec): min=116, max=2949, avg=788.49, stdev=1068.86 clat percentiles (msec): | 1.00th=[ 117], 5.00th=[ 117], 10.00th=[ 117], 20.00th=[ 296], | 30.00th=[ 296], 40.00th=[ 368], 50.00th=[ 368], 60.00th=[ 447], | 70.00th=[ 558], 80.00th=[ 558], 90.00th=[ 2937], 95.00th=[ 2937], | 99.00th=[ 2937], 99.50th=[ 2937], 99.90th=[ 2937], 99.95th=[ 2937], | 99.99th=[ 2937] bw ( KiB/s): min= 1921, max= 2023, per=60.69%, avg=1990.00, stdev=42.07, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 lat (usec) : 1000=8.33% lat (msec) : 2=8.33%, 250=25.00%, 500=41.67%, 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=8.04%, ctx=280, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=6,6,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145113: Sat Sep 5 18:27:17 2026 read: IOPS=0, BW=623KiB/s (638kB/s)(5120KiB/8219msec) clat (usec): min=505, max=2489.9k, avg=605924.62, stdev=1072098.03 lat (usec): min=507, max=2489.9k, avg=605926.16, stdev=1072097.88 clat percentiles (usec): | 1.00th=[ 506], 5.00th=[ 506], 10.00th=[ 506], | 20.00th=[ 506], 30.00th=[ 873], 40.00th=[ 873], | 50.00th=[ 58459], 60.00th=[ 58459], 70.00th=[ 480248], | 80.00th=[ 480248], 90.00th=[2499806], 95.00th=[2499806], | 99.00th=[2499806], 99.50th=[2499806], 99.90th=[2499806], | 99.95th=[2499806], 99.99th=[2499806] bw ( KiB/s): min= 4039, max= 4039, per=100.00%, avg=4039.00, stdev= 0.00, samples=1 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=1 write: IOPS=0, BW=872KiB/s (893kB/s)(7168KiB/8219msec); 0 zone resets clat (msec): min=107, max=3042, avg=722.05, stdev=1058.91 lat (msec): min=107, max=3042, avg=722.14, stdev=1058.90 clat percentiles (msec): | 1.00th=[ 108], 5.00th=[ 108], 10.00th=[ 108], 20.00th=[ 128], | 30.00th=[ 136], 40.00th=[ 136], 50.00th=[ 279], 60.00th=[ 493], | 70.00th=[ 493], 80.00th=[ 869], 90.00th=[ 3037], 95.00th=[ 3037], | 99.00th=[ 3037], 99.50th=[ 3037], 99.90th=[ 3037], 99.95th=[ 3037], | 99.99th=[ 3037] bw ( KiB/s): min= 1921, max= 2035, per=60.89%, avg=1996.50, stdev=51.62, samples=4 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=4 lat (usec) : 750=8.33%, 1000=8.33% lat (msec) : 100=8.33%, 250=25.00%, 500=25.00%, 1000=8.33%, >=2000=16.67% cpu : usr=0.00%, sys=7.42%, ctx=611, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=5,7,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=2343KiB/s (2399kB/s), 234KiB/s-1220KiB/s (240kB/s-1250kB/s), io=20.0MiB (20.0MB), run=5874-8742msec WRITE: bw=3280KiB/s (3359kB/s), 872KiB/s-1171KiB/s (893kB/s-1199kB/s), io=28.0MiB (29.4MB), run=5874-8742msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145115: Sat Sep 5 18:27:18 2026 read: IOPS=1, BW=1163KiB/s (1190kB/s)(7168KiB/6166msec) clat (msec): min=45, max=188, avg=111.37, stdev=48.76 lat (msec): min=45, max=188, avg=111.37, stdev=48.76 clat percentiles (msec): | 1.00th=[ 46], 5.00th=[ 46], 10.00th=[ 46], 20.00th=[ 69], | 30.00th=[ 84], 40.00th=[ 84], 50.00th=[ 124], 60.00th=[ 125], | 70.00th=[ 125], 80.00th=[ 146], 90.00th=[ 188], 95.00th=[ 188], | 99.00th=[ 188], 99.50th=[ 188], 99.90th=[ 188], 99.95th=[ 188], | 99.99th=[ 188] bw ( KiB/s): min= 1872, max= 4055, per=100.00%, avg=3280.67, stdev=1221.95, samples=3 iops : min= 1, max= 3, avg= 2.33, stdev= 1.15, samples=3 write: IOPS=0, BW=830KiB/s (850kB/s)(5120KiB/6166msec); 0 zone resets clat (msec): min=148, max=2914, avg=1028.28, stdev=1113.10 lat (msec): min=148, max=2914, avg=1028.38, stdev=1113.12 clat percentiles (msec): | 1.00th=[ 148], 5.00th=[ 148], 10.00th=[ 148], 20.00th=[ 148], | 30.00th=[ 355], 40.00th=[ 355], 50.00th=[ 625], 60.00th=[ 625], | 70.00th=[ 1099], 80.00th=[ 1099], 90.00th=[ 2903], 95.00th=[ 2903], | 99.00th=[ 2903], 99.50th=[ 2903], 99.90th=[ 2903], 99.95th=[ 2903], | 99.99th=[ 2903] bw ( KiB/s): min= 1903, max= 2048, per=64.70%, avg=1998.00, stdev=82.31, samples=3 iops : min= 1, max= 2, avg= 1.33, stdev= 0.58, samples=3 lat (msec) : 50=8.33%, 100=16.67%, 250=41.67%, 500=8.33%, 750=8.33% lat (msec) : 2000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=3.91%, ctx=107, 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=145116: Sat Sep 5 18:27:18 2026 read: IOPS=0, BW=221KiB/s (226kB/s)(2048KiB/9279msec) clat (msec): min=88, max=2606, avg=1347.35, stdev=1780.50 lat (msec): min=88, max=2606, avg=1347.35, stdev=1780.50 clat percentiles (msec): | 1.00th=[ 89], 5.00th=[ 89], 10.00th=[ 89], 20.00th=[ 89], | 30.00th=[ 89], 40.00th=[ 89], 50.00th=[ 89], 60.00th=[ 2601], | 70.00th=[ 2601], 80.00th=[ 2601], 90.00th=[ 2601], 95.00th=[ 2601], | 99.00th=[ 2601], 99.50th=[ 2601], 99.90th=[ 2601], 99.95th=[ 2601], | 99.99th=[ 2601] bw ( KiB/s): min= 2027, max= 2031, per=91.98%, avg=2029.00, stdev= 2.83, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1104KiB/s (1130kB/s)(10.0MiB/9279msec); 0 zone resets clat (msec): min=139, max=2324, avg=634.66, stdev=655.01 lat (msec): min=139, max=2324, avg=634.85, stdev=654.96 clat percentiles (msec): | 1.00th=[ 140], 5.00th=[ 140], 10.00th=[ 140], 20.00th=[ 159], | 30.00th=[ 205], 40.00th=[ 249], 50.00th=[ 451], 60.00th=[ 460], | 70.00th=[ 634], 80.00th=[ 743], 90.00th=[ 986], 95.00th=[ 2333], | 99.00th=[ 2333], 99.50th=[ 2333], 99.90th=[ 2333], 99.95th=[ 2333], | 99.99th=[ 2333] bw ( KiB/s): min= 1903, max= 6083, per=83.04%, avg=2564.43, stdev=1552.70, samples=7 iops : min= 1, max= 5, avg= 1.57, stdev= 1.51, samples=7 lat (msec) : 100=8.33%, 250=33.33%, 500=16.67%, 750=16.67%, 1000=8.33% lat (msec) : >=2000=16.67% cpu : usr=0.01%, sys=2.36%, ctx=99, 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=145117: Sat Sep 5 18:27:18 2026 read: IOPS=0, BW=687KiB/s (704kB/s)(6144KiB/8942msec) clat (msec): min=75, max=386, avg=223.85, stdev=114.26 lat (msec): min=75, max=386, avg=223.85, stdev=114.26 clat percentiles (msec): | 1.00th=[ 75], 5.00th=[ 75], 10.00th=[ 75], 20.00th=[ 114], | 30.00th=[ 114], 40.00th=[ 236], 50.00th=[ 236], 60.00th=[ 245], | 70.00th=[ 288], 80.00th=[ 288], 90.00th=[ 388], 95.00th=[ 388], | 99.00th=[ 388], 99.50th=[ 388], 99.90th=[ 388], 99.95th=[ 388], | 99.99th=[ 388] bw ( KiB/s): min= 1903, max= 2035, per=89.17%, avg=1967.00, stdev=73.97, samples=4 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=4 write: IOPS=0, BW=687KiB/s (704kB/s)(6144KiB/8942msec); 0 zone resets clat (msec): min=124, max=3385, avg=1225.39, stdev=1460.92 lat (msec): min=124, max=3385, avg=1226.02, stdev=1460.51 clat percentiles (msec): | 1.00th=[ 125], 5.00th=[ 125], 10.00th=[ 125], 20.00th=[ 201], | 30.00th=[ 201], 40.00th=[ 262], 50.00th=[ 262], 60.00th=[ 600], | 70.00th=[ 2769], 80.00th=[ 2769], 90.00th=[ 3373], 95.00th=[ 3373], | 99.00th=[ 3373], 99.50th=[ 3373], 99.90th=[ 3373], 99.95th=[ 3373], | 99.99th=[ 3373] bw ( KiB/s): min= 2027, max= 3915, per=81.12%, avg=2505.00, stdev=940.02, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 lat (msec) : 100=8.33%, 250=41.67%, 500=25.00%, 750=8.33%, >=2000=16.67% cpu : usr=0.00%, sys=2.37%, ctx=104, 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=145118: Sat Sep 5 18:27:18 2026 read: IOPS=0, BW=552KiB/s (565kB/s)(5120KiB/9282msec) clat (msec): min=73, max=2451, avg=661.06, stdev=1010.54 lat (msec): min=73, max=2451, avg=661.06, stdev=1010.54 clat percentiles (msec): | 1.00th=[ 74], 5.00th=[ 74], 10.00th=[ 74], 20.00th=[ 74], | 30.00th=[ 122], 40.00th=[ 122], 50.00th=[ 226], 60.00th=[ 226], | 70.00th=[ 435], 80.00th=[ 435], 90.00th=[ 2467], 95.00th=[ 2467], | 99.00th=[ 2467], 99.50th=[ 2467], 99.90th=[ 2467], 99.95th=[ 2467], | 99.99th=[ 2467] bw ( KiB/s): min= 2007, max= 2039, per=91.80%, avg=2025.00, stdev=13.27, samples=4 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=4 write: IOPS=0, BW=772KiB/s (791kB/s)(7168KiB/9282msec); 0 zone resets clat (msec): min=130, max=3374, avg=809.15, stdev=1185.73 lat (msec): min=130, max=3374, avg=809.26, stdev=1185.73 clat percentiles (msec): | 1.00th=[ 131], 5.00th=[ 131], 10.00th=[ 131], 20.00th=[ 133], | 30.00th=[ 142], 40.00th=[ 142], 50.00th=[ 305], 60.00th=[ 447], | 70.00th=[ 447], 80.00th=[ 1133], 90.00th=[ 3373], 95.00th=[ 3373], | 99.00th=[ 3373], 99.50th=[ 3373], 99.90th=[ 3373], 99.95th=[ 3373], | 99.99th=[ 3373] bw ( KiB/s): min= 1961, max= 2039, per=64.85%, avg=2002.50, stdev=32.02, samples=4 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=4 lat (msec) : 100=8.33%, 250=41.67%, 500=25.00%, 2000=8.33%, >=2000=16.67% cpu : usr=0.01%, sys=2.26%, ctx=105, 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=2206KiB/s (2259kB/s), 221KiB/s-1163KiB/s (226kB/s-1190kB/s), io=20.0MiB (20.0MB), run=6166-9282msec WRITE: bw=3089KiB/s (3163kB/s), 687KiB/s-1104KiB/s (704kB/s-1130kB/s), io=28.0MiB (29.4MB), run=6166-9282msec 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=145127: Sat Sep 5 18:27:33 2026 read: IOPS=2, BW=11.4MiB/s (11.0MB/s)(12.0MiB/1050msec) clat (msec): min=253, max=344, avg=312.19, stdev=51.30 lat (msec): min=253, max=344, avg=312.19, stdev=51.30 clat percentiles (msec): | 1.00th=[ 253], 5.00th=[ 253], 10.00th=[ 253], 20.00th=[ 253], | 30.00th=[ 253], 40.00th=[ 338], 50.00th=[ 338], 60.00th=[ 338], | 70.00th=[ 347], 80.00th=[ 347], 90.00th=[ 347], 95.00th=[ 347], | 99.00th=[ 347], 99.50th=[ 347], 99.90th=[ 347], 99.95th=[ 347], | 99.99th=[ 347] bw ( KiB/s): min=10893, max=10893, per=100.00%, avg=10893.00, stdev= 0.00, samples=1 iops : min= 2, max= 2, avg= 2.00, stdev= 0.00, samples=1 lat (msec) : 500=100.00% cpu : usr=0.00%, sys=10.10%, ctx=67, 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=145128: Sat Sep 5 18:27:33 2026 read: IOPS=0, BW=767KiB/s (786kB/s)(4096KiB/5337msec) clat (nsec): min=3469.4M, max=3469.4M, avg=3469443078.00, stdev= 0.00 lat (nsec): min=3469.4M, max=3469.4M, avg=3469446162.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 3473], 5.00th=[ 3473], 10.00th=[ 3473], 20.00th=[ 3473], | 30.00th=[ 3473], 40.00th=[ 3473], 50.00th=[ 3473], 60.00th=[ 3473], | 70.00th=[ 3473], 80.00th=[ 3473], 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= 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=1535KiB/s (1572kB/s)(8192KiB/5337msec); 0 zone resets clat (msec): min=745, max=1061, avg=903.66, stdev=223.49 lat (msec): min=746, max=1061, avg=904.11, stdev=223.15 clat percentiles (msec): | 1.00th=[ 743], 5.00th=[ 743], 10.00th=[ 743], 20.00th=[ 743], | 30.00th=[ 743], 40.00th=[ 743], 50.00th=[ 743], 60.00th=[ 1062], | 70.00th=[ 1062], 80.00th=[ 1062], 90.00th=[ 1062], 95.00th=[ 1062], | 99.00th=[ 1062], 99.50th=[ 1062], 99.90th=[ 1062], 99.95th=[ 1062], | 99.99th=[ 1062] bw ( KiB/s): min= 7861, max= 7861, per=100.00%, avg=7861.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 750=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=1.76%, ctx=35, 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=145129: Sat Sep 5 18:27:33 2026 write: IOPS=0, BW=2272KiB/s (2326kB/s)(12.0MiB/5409msec); 0 zone resets clat (msec): min=311, max=3863, avg=1732.54, stdev=1879.64 lat (msec): min=312, max=3864, avg=1734.19, stdev=1878.82 clat percentiles (msec): | 1.00th=[ 313], 5.00th=[ 313], 10.00th=[ 313], 20.00th=[ 313], | 30.00th=[ 313], 40.00th=[ 1020], 50.00th=[ 1020], 60.00th=[ 1020], | 70.00th=[ 3876], 80.00th=[ 3876], 90.00th=[ 3876], 95.00th=[ 3876], | 99.00th=[ 3876], 99.50th=[ 3876], 99.90th=[ 3876], 99.95th=[ 3876], | 99.99th=[ 3876] bw ( KiB/s): min= 8078, max= 8126, per=100.00%, avg=8102.00, stdev=33.94, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=1.76%, ctx=52, 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=145132: Sat Sep 5 18:27:33 2026 write: IOPS=0, BW=2466KiB/s (2525kB/s)(12.0MiB/4983msec); 0 zone resets clat (msec): min=397, max=4058, avg=1618.23, stdev=2113.18 lat (msec): min=399, max=4058, avg=1619.97, stdev=2112.02 clat percentiles (msec): | 1.00th=[ 397], 5.00th=[ 397], 10.00th=[ 397], 20.00th=[ 397], | 30.00th=[ 397], 40.00th=[ 401], 50.00th=[ 401], 60.00th=[ 401], | 70.00th=[ 4044], 80.00th=[ 4044], 90.00th=[ 4044], 95.00th=[ 4044], | 99.00th=[ 4044], 99.50th=[ 4044], 99.90th=[ 4044], 99.95th=[ 4044], | 99.99th=[ 4044] bw ( KiB/s): min= 5752, max= 8175, per=100.00%, avg=6963.50, stdev=1713.32, 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=0.08%, sys=1.97%, ctx=51, 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=3070KiB/s (3144kB/s), 767KiB/s-11.4MiB/s (786kB/s-11.0MB/s), io=16.0MiB (16.8MB), run=1050-5337msec WRITE: bw=6058KiB/s (6203kB/s), 1535KiB/s-2466KiB/s (1572kB/s-2525kB/s), io=32.0MiB (33.6MB), run=4983-5409msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145130: Sat Sep 5 18:27:33 2026 read: IOPS=0, BW=2415KiB/s (2473kB/s)(12.0MiB/5089msec) clat (msec): min=852, max=3061, avg=1598.25, stdev=1267.38 lat (msec): min=852, max=3061, avg=1598.26, stdev=1267.38 clat percentiles (msec): | 1.00th=[ 852], 5.00th=[ 852], 10.00th=[ 852], 20.00th=[ 852], | 30.00th=[ 852], 40.00th=[ 885], 50.00th=[ 885], 60.00th=[ 885], | 70.00th=[ 3071], 80.00th=[ 3071], 90.00th=[ 3071], 95.00th=[ 3071], | 99.00th=[ 3071], 99.50th=[ 3071], 99.90th=[ 3071], 99.95th=[ 3071], | 99.99th=[ 3071] bw ( KiB/s): min= 8062, max= 8126, per=100.00%, avg=8094.00, stdev=45.25, 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=6.53%, ctx=646, 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=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=145131: Sat Sep 5 18:27:33 2026 read: IOPS=0, BW=898KiB/s (920kB/s)(4096KiB/4561msec) clat (nsec): min=3203.2M, max=3203.2M, avg=3203163305.00, stdev= 0.00 lat (nsec): min=3203.2M, max=3203.2M, avg=3203166370.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 3205], 5.00th=[ 3205], 10.00th=[ 3205], 20.00th=[ 3205], | 30.00th=[ 3205], 40.00th=[ 3205], 50.00th=[ 3205], 60.00th=[ 3205], | 70.00th=[ 3205], 80.00th=[ 3205], 90.00th=[ 3205], 95.00th=[ 3205], | 99.00th=[ 3205], 99.50th=[ 3205], 99.90th=[ 3205], 99.95th=[ 3205], | 99.99th=[ 3205] bw ( KiB/s): min= 8062, max= 8062, per=100.00%, avg=8062.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=1796KiB/s (1839kB/s)(8192KiB/4561msec); 0 zone resets clat (msec): min=548, max=590, avg=569.37, stdev=30.21 lat (msec): min=548, max=592, avg=570.63, stdev=31.03 clat percentiles (msec): | 1.00th=[ 550], 5.00th=[ 550], 10.00th=[ 550], 20.00th=[ 550], | 30.00th=[ 550], 40.00th=[ 550], 50.00th=[ 550], 60.00th=[ 592], | 70.00th=[ 592], 80.00th=[ 592], 90.00th=[ 592], 95.00th=[ 592], | 99.00th=[ 592], 99.50th=[ 592], 99.90th=[ 592], 99.95th=[ 592], | 99.99th=[ 592] bw ( KiB/s): min= 8192, max= 8192, per=100.00%, avg=8192.00, stdev= 0.00, samples=1 iops : min= 2, max= 2, avg= 2.00, stdev= 0.00, samples=1 lat (msec) : 750=66.67%, >=2000=33.33% cpu : usr=0.00%, sys=5.68%, ctx=429, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1,2,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145133: Sat Sep 5 18:27:33 2026 write: IOPS=0, BW=2202KiB/s (2255kB/s)(12.0MiB/5580msec); 0 zone resets clat (msec): min=182, max=3960, avg=1729.18, stdev=1980.03 lat (msec): min=183, max=3961, avg=1729.66, stdev=1979.96 clat percentiles (msec): | 1.00th=[ 184], 5.00th=[ 184], 10.00th=[ 184], 20.00th=[ 184], | 30.00th=[ 184], 40.00th=[ 1045], 50.00th=[ 1045], 60.00th=[ 1045], | 70.00th=[ 3977], 80.00th=[ 3977], 90.00th=[ 3977], 95.00th=[ 3977], | 99.00th=[ 3977], 99.50th=[ 3977], 99.90th=[ 3977], 99.95th=[ 3977], | 99.99th=[ 3977] bw ( KiB/s): min= 8159, max= 8159, per=100.00%, avg=8159.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 250=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=1.34%, ctx=48, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145134: Sat Sep 5 18:27:33 2026 write: IOPS=0, BW=2339KiB/s (2395kB/s)(12.0MiB/5254msec); 0 zone resets clat (msec): min=304, max=4302, avg=1637.52, stdev=2307.74 lat (msec): min=304, max=4303, avg=1638.03, stdev=2307.99 clat percentiles (msec): | 1.00th=[ 305], 5.00th=[ 305], 10.00th=[ 305], 20.00th=[ 305], | 30.00th=[ 305], 40.00th=[ 305], 50.00th=[ 305], 60.00th=[ 305], | 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=16318, max=16318, per=100.00%, avg=16318.00, stdev= 0.00, samples=1 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=1 lat (msec) : 500=66.67%, >=2000=33.33% cpu : usr=0.00%, sys=1.43%, ctx=56, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=3219KiB/s (3297kB/s), 898KiB/s-2415KiB/s (920kB/s-2473kB/s), io=16.0MiB (16.8MB), run=4561-5089msec WRITE: bw=5872KiB/s (6013kB/s), 1796KiB/s-2339KiB/s (1839kB/s-2395kB/s), io=32.0MiB (33.6MB), run=4561-5580msec