== sanity test 398b: DIO and buffer IO race ============== 13:42:24 (1721410944) /usr/bin/fio 12+0 records in 12+0 records out 12582912 bytes (13 MB) copied, 0.114296 s, 110 MB/s mix direct rw 12M to OST0 by fio with 4 jobs... mix buffer rw 12M to OST0 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-3.7 Starting 4 processes rand-rw: (g=0): rw=randrw, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=psync, iodepth=16 ... fio-3.7 Starting 4 processes rand-rw: (groupid=0, jobs=1): err= 0: pid=17910: Fri Jul 19 13:42:27 2024 read: IOPS=376, BW=1504KiB/s (1540kB/s)(1480KiB/984msec) clat (usec): min=3, max=24565, avg=1525.82, stdev=2154.57 lat (usec): min=3, max=24566, avg=1526.44, stdev=2154.81 clat percentiles (usec): | 1.00th=[ 5], 5.00th=[ 6], 10.00th=[ 8], 20.00th=[ 10], | 30.00th=[ 12], 40.00th=[ 21], 50.00th=[ 1037], 60.00th=[ 1762], | 70.00th=[ 2212], 80.00th=[ 2573], 90.00th=[ 3163], 95.00th=[ 4424], | 99.00th=[ 9896], 99.50th=[11600], 99.90th=[24511], 99.95th=[24511], | 99.99th=[24511] bw ( KiB/s): min= 1160, max= 1160, per=20.87%, avg=1160.00, stdev= 0.00, samples=1 iops : min= 290, max= 290, avg=290.00, stdev= 0.00, samples=1 write: IOPS=404, BW=1618KiB/s (1657kB/s)(1592KiB/984msec) clat (usec): min=89, max=25670, avg=1026.43, stdev=1711.25 lat (usec): min=90, max=25671, avg=1027.40, stdev=1711.58 clat percentiles (usec): | 1.00th=[ 95], 5.00th=[ 103], 10.00th=[ 110], 20.00th=[ 123], | 30.00th=[ 157], 40.00th=[ 204], 50.00th=[ 461], 60.00th=[ 922], | 70.00th=[ 1156], 80.00th=[ 1696], 90.00th=[ 2343], 95.00th=[ 3130], | 99.00th=[ 6587], 99.50th=[ 8291], 99.90th=[25560], 99.95th=[25560], | 99.99th=[25560] bw ( KiB/s): min= 1104, max= 1104, per=18.88%, avg=1104.00, stdev= 0.00, samples=1 iops : min= 276, max= 276, avg=276.00, stdev= 0.00, samples=1 lat (usec) : 4=0.39%, 10=11.07%, 20=7.68%, 50=0.26%, 100=2.08% lat (usec) : 250=22.14%, 500=3.12%, 750=3.12%, 1000=7.03% lat (msec) : 2=17.19%, 4=21.48%, 10=3.91%, 20=0.26%, 50=0.26% cpu : usr=0.51%, sys=16.99%, ctx=951, majf=0, minf=33 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=17911: Fri Jul 19 13:42:27 2024 read: IOPS=346, BW=1386KiB/s (1419kB/s)(1436KiB/1036msec) clat (usec): min=3, max=39320, avg=1588.00, stdev=2728.26 lat (usec): min=3, max=39321, avg=1588.86, stdev=2728.35 clat percentiles (usec): | 1.00th=[ 4], 5.00th=[ 7], 10.00th=[ 8], 20.00th=[ 10], | 30.00th=[ 11], 40.00th=[ 562], 50.00th=[ 1270], 60.00th=[ 1614], | 70.00th=[ 2114], 80.00th=[ 2606], 90.00th=[ 3228], 95.00th=[ 4228], | 99.00th=[10683], 99.50th=[14746], 99.90th=[39060], 99.95th=[39060], | 99.99th=[39060] bw ( KiB/s): min= 966, max= 1800, per=24.88%, avg=1383.00, stdev=589.73, samples=2 iops : min= 241, max= 450, avg=345.50, stdev=147.79, samples=2 write: IOPS=394, BW=1579KiB/s (1617kB/s)(1636KiB/1036msec) clat (usec): min=90, max=27300, avg=1106.79, stdev=1800.45 lat (usec): min=90, max=27301, avg=1107.46, stdev=1800.46 clat percentiles (usec): | 1.00th=[ 96], 5.00th=[ 104], 10.00th=[ 113], 20.00th=[ 129], | 30.00th=[ 161], 40.00th=[ 217], 50.00th=[ 635], 60.00th=[ 857], | 70.00th=[ 1237], 80.00th=[ 1893], 90.00th=[ 2769], 95.00th=[ 3621], | 99.00th=[ 5735], 99.50th=[ 6325], 99.90th=[27395], 99.95th=[27395], | 99.99th=[27395] bw ( KiB/s): min= 1189, max= 1936, per=26.71%, avg=1562.50, stdev=528.21, samples=2 iops : min= 297, max= 484, avg=390.50, stdev=132.23, samples=2 lat (usec) : 4=0.78%, 10=11.59%, 20=4.95%, 50=0.65%, 100=1.69% lat (usec) : 250=21.61%, 500=2.47%, 750=3.52%, 1000=8.85% lat (msec) : 2=19.66%, 4=19.66%, 10=3.91%, 20=0.39%, 50=0.26% cpu : usr=0.39%, sys=18.07%, ctx=1004, majf=0, minf=34 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=17912: Fri Jul 19 13:42:27 2024 read: IOPS=363, BW=1452KiB/s (1487kB/s)(1564KiB/1077msec) clat (usec): min=3, max=29724, avg=1663.57, stdev=2422.57 lat (usec): min=3, max=29725, avg=1664.68, stdev=2422.37 clat percentiles (usec): | 1.00th=[ 4], 5.00th=[ 6], 10.00th=[ 8], 20.00th=[ 11], | 30.00th=[ 14], 40.00th=[ 930], 50.00th=[ 1532], 60.00th=[ 1876], | 70.00th=[ 2212], 80.00th=[ 2638], 90.00th=[ 3228], 95.00th=[ 4621], | 99.00th=[ 8717], 99.50th=[25035], 99.90th=[29754], 99.95th=[29754], | 99.99th=[29754] bw ( KiB/s): min= 1048, max= 1736, per=25.04%, avg=1392.00, stdev=486.49, samples=2 iops : min= 262, max= 434, avg=348.00, stdev=121.62, samples=2 write: IOPS=350, BW=1400KiB/s (1434kB/s)(1508KiB/1077msec) clat (usec): min=86, max=14668, avg=1096.44, stdev=1390.53 lat (usec): min=86, max=14668, avg=1097.49, stdev=1390.47 clat percentiles (usec): | 1.00th=[ 96], 5.00th=[ 109], 10.00th=[ 119], 20.00th=[ 153], | 30.00th=[ 194], 40.00th=[ 314], 50.00th=[ 783], 60.00th=[ 996], | 70.00th=[ 1254], 80.00th=[ 1893], 90.00th=[ 2507], 95.00th=[ 3425], | 99.00th=[ 6390], 99.50th=[10028], 99.90th=[14615], 99.95th=[14615], | 99.99th=[14615] bw ( KiB/s): min= 1040, max= 1656, per=23.05%, avg=1348.00, stdev=435.58, samples=2 iops : min= 260, max= 414, avg=337.00, stdev=108.89, samples=2 lat (usec) : 4=0.52%, 10=9.24%, 20=8.07%, 50=0.52%, 100=1.43% lat (usec) : 250=16.80%, 500=3.91%, 750=2.47%, 1000=7.42% lat (msec) : 2=22.53%, 4=22.53%, 10=4.04%, 20=0.26%, 50=0.26% cpu : usr=0.37%, sys=18.12%, ctx=1041, majf=0, minf=33 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=17913: Fri Jul 19 13:42:27 2024 read: IOPS=374, BW=1499KiB/s (1535kB/s)(1508KiB/1006msec) clat (usec): min=3, max=23642, avg=1579.59, stdev=2131.76 lat (usec): min=3, max=23643, avg=1581.31, stdev=2131.15 clat percentiles (usec): | 1.00th=[ 5], 5.00th=[ 7], 10.00th=[ 8], 20.00th=[ 10], | 30.00th=[ 14], 40.00th=[ 840], 50.00th=[ 1434], 60.00th=[ 1860], | 70.00th=[ 2147], 80.00th=[ 2540], 90.00th=[ 3097], 95.00th=[ 4178], | 99.00th=[11207], 99.50th=[13698], 99.90th=[23725], 99.95th=[23725], | 99.99th=[23725] bw ( KiB/s): min= 1064, max= 1912, per=26.77%, avg=1488.00, stdev=599.63, samples=2 iops : min= 266, max= 478, avg=372.00, stdev=149.91, samples=2 write: IOPS=388, BW=1555KiB/s (1592kB/s)(1564KiB/1006msec) clat (usec): min=88, max=8787, avg=1016.61, stdev=1157.87 lat (usec): min=88, max=8789, avg=1017.89, stdev=1157.52 clat percentiles (usec): | 1.00th=[ 92], 5.00th=[ 102], 10.00th=[ 111], 20.00th=[ 129], | 30.00th=[ 174], 40.00th=[ 262], 50.00th=[ 676], 60.00th=[ 914], | 70.00th=[ 1172], 80.00th=[ 1827], 90.00th=[ 2638], 95.00th=[ 3261], | 99.00th=[ 5014], 99.50th=[ 5342], 99.90th=[ 8848], 99.95th=[ 8848], | 99.99th=[ 8848] bw ( KiB/s): min= 1056, max= 2056, per=26.60%, avg=1556.00, stdev=707.11, samples=2 iops : min= 264, max= 514, avg=389.00, stdev=176.78, samples=2 lat (usec) : 4=0.13%, 10=11.46%, 20=6.12%, 50=0.52%, 100=2.47% lat (usec) : 250=17.97%, 500=4.30%, 750=2.86%, 1000=8.33% lat (msec) : 2=19.66%, 4=21.74%, 10=3.91%, 20=0.39%, 50=0.13% cpu : usr=0.50%, sys=18.21%, ctx=1029, majf=0, minf=34 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=5560KiB/s (5693kB/s), 1386KiB/s-1504KiB/s (1419kB/s-1540kB/s), io=5988KiB (6132kB), run=984-1077msec WRITE: bw=5850KiB/s (5990kB/s), 1400KiB/s-1618KiB/s (1434kB/s-1657kB/s), io=6300KiB (6451kB), run=984-1077msec rand-rw: (groupid=0, jobs=1): err= 0: pid=17914: Fri Jul 19 13:42:28 2024 read: IOPS=221, BW=886KiB/s (907kB/s)(1480KiB/1671msec) clat (usec): min=570, max=22074, avg=1519.37, stdev=1806.54 lat (usec): min=570, max=22076, avg=1520.03, stdev=1806.61 clat percentiles (usec): | 1.00th=[ 603], 5.00th=[ 685], 10.00th=[ 750], 20.00th=[ 824], | 30.00th=[ 881], 40.00th=[ 938], 50.00th=[ 996], 60.00th=[ 1123], | 70.00th=[ 1352], 80.00th=[ 1778], 90.00th=[ 2802], 95.00th=[ 4113], | 99.00th=[ 5276], 99.50th=[21890], 99.90th=[22152], 99.95th=[22152], | 99.99th=[22152] bw ( KiB/s): min= 624, max= 1096, per=24.13%, avg=840.00, stdev=238.53, samples=3 iops : min= 156, max= 274, avg=210.00, stdev=59.63, samples=3 write: IOPS=238, BW=953KiB/s (976kB/s)(1592KiB/1671msec) clat (usec): min=1284, max=12003, avg=2761.71, stdev=1378.46 lat (usec): min=1285, max=12004, avg=2762.53, stdev=1378.44 clat percentiles (usec): | 1.00th=[ 1336], 5.00th=[ 1500], 10.00th=[ 1696], 20.00th=[ 1926], | 30.00th=[ 2040], 40.00th=[ 2147], 50.00th=[ 2343], 60.00th=[ 2573], | 70.00th=[ 2868], 80.00th=[ 3359], 90.00th=[ 4293], 95.00th=[ 5473], | 99.00th=[ 9372], 99.50th=[ 9765], 99.90th=[11994], 99.95th=[11994], | 99.99th=[11994] bw ( KiB/s): min= 640, max= 1264, per=24.98%, avg=914.67, stdev=318.63, samples=3 iops : min= 160, max= 316, avg=228.67, stdev=79.66, samples=3 lat (usec) : 750=4.82%, 1000=19.40% lat (msec) : 2=29.95%, 4=36.98%, 10=8.46%, 20=0.13%, 50=0.26% cpu : usr=0.24%, sys=6.29%, ctx=805, majf=0, minf=32 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=17915: Fri Jul 19 13:42:28 2024 read: IOPS=210, BW=842KiB/s (862kB/s)(1436KiB/1705msec) clat (usec): min=547, max=21206, avg=1453.77, stdev=1486.20 lat (usec): min=547, max=21208, avg=1455.20, stdev=1485.96 clat percentiles (usec): | 1.00th=[ 627], 5.00th=[ 701], 10.00th=[ 742], 20.00th=[ 824], | 30.00th=[ 873], 40.00th=[ 922], 50.00th=[ 979], 60.00th=[ 1057], | 70.00th=[ 1287], 80.00th=[ 1680], 90.00th=[ 2835], 95.00th=[ 3916], | 99.00th=[ 5080], 99.50th=[ 8979], 99.90th=[21103], 99.95th=[21103], | 99.99th=[21103] bw ( KiB/s): min= 616, max= 1160, per=23.06%, avg=802.67, stdev=309.56, samples=3 iops : min= 154, max= 290, avg=200.67, stdev=77.39, samples=3 write: IOPS=239, BW=960KiB/s (983kB/s)(1636KiB/1705msec) clat (usec): min=1053, max=18541, avg=2868.72, stdev=1615.97 lat (usec): min=1054, max=18543, avg=2869.55, stdev=1616.00 clat percentiles (usec): | 1.00th=[ 1188], 5.00th=[ 1467], 10.00th=[ 1663], 20.00th=[ 1893], | 30.00th=[ 2040], 40.00th=[ 2180], 50.00th=[ 2343], 60.00th=[ 2573], | 70.00th=[ 3032], 80.00th=[ 3654], 90.00th=[ 4817], 95.00th=[ 5604], | 99.00th=[ 7898], 99.50th=[10028], 99.90th=[18482], 99.95th=[18482], | 99.99th=[18482] bw ( KiB/s): min= 672, max= 1168, per=24.69%, avg=904.00, stdev=249.54, samples=3 iops : min= 168, max= 292, avg=226.00, stdev=62.39, samples=3 lat (usec) : 750=4.95%, 1000=20.05% lat (msec) : 2=28.91%, 4=34.64%, 10=10.94%, 20=0.39%, 50=0.13% cpu : usr=0.23%, sys=6.92%, ctx=826, majf=0, minf=34 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=17916: Fri Jul 19 13:42:28 2024 read: IOPS=231, BW=924KiB/s (947kB/s)(1564KiB/1692msec) clat (usec): min=599, max=8826, avg=1431.05, stdev=1061.88 lat (usec): min=599, max=8826, avg=1431.89, stdev=1062.03 clat percentiles (usec): | 1.00th=[ 627], 5.00th=[ 701], 10.00th=[ 758], 20.00th=[ 824], | 30.00th=[ 881], 40.00th=[ 947], 50.00th=[ 1004], 60.00th=[ 1106], | 70.00th=[ 1336], 80.00th=[ 1778], 90.00th=[ 2900], 95.00th=[ 3884], | 99.00th=[ 5604], 99.50th=[ 6063], 99.90th=[ 8848], 99.95th=[ 8848], | 99.99th=[ 8848] bw ( KiB/s): min= 568, max= 1192, per=24.51%, avg=853.33, stdev=315.40, samples=3 iops : min= 142, max= 298, avg=213.33, stdev=78.85, samples=3 write: IOPS=222, BW=891KiB/s (913kB/s)(1508KiB/1692msec) clat (usec): min=1167, max=27408, avg=2977.41, stdev=2246.21 lat (usec): min=1168, max=27409, avg=2978.26, stdev=2246.33 clat percentiles (usec): | 1.00th=[ 1221], 5.00th=[ 1450], 10.00th=[ 1647], 20.00th=[ 1926], | 30.00th=[ 2040], 40.00th=[ 2180], 50.00th=[ 2343], 60.00th=[ 2573], | 70.00th=[ 2933], 80.00th=[ 3621], 90.00th=[ 5014], 95.00th=[ 6128], | 99.00th=[11207], 99.50th=[24511], 99.90th=[27395], 99.95th=[27395], | 99.99th=[27395] bw ( KiB/s): min= 664, max= 1184, per=23.23%, avg=850.67, stdev=289.37, samples=3 iops : min= 166, max= 296, avg=212.67, stdev=72.34, samples=3 lat (usec) : 750=4.82%, 1000=19.92% lat (msec) : 2=30.99%, 4=34.24%, 10=9.51%, 20=0.26%, 50=0.26% cpu : usr=0.41%, sys=6.45%, ctx=811, majf=0, minf=34 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=17917: Fri Jul 19 13:42:28 2024 read: IOPS=219, BW=877KiB/s (898kB/s)(1508KiB/1720msec) clat (usec): min=591, max=7805, avg=1509.10, stdev=1152.79 lat (usec): min=591, max=7806, avg=1509.76, stdev=1152.79 clat percentiles (usec): | 1.00th=[ 627], 5.00th=[ 693], 10.00th=[ 742], 20.00th=[ 832], | 30.00th=[ 906], 40.00th=[ 955], 50.00th=[ 1029], 60.00th=[ 1123], | 70.00th=[ 1352], 80.00th=[ 2008], 90.00th=[ 3097], 95.00th=[ 4047], | 99.00th=[ 6325], 99.50th=[ 7308], 99.90th=[ 7832], 99.95th=[ 7832], | 99.99th=[ 7832] bw ( KiB/s): min= 584, max= 1040, per=23.29%, avg=810.67, stdev=228.01, samples=3 iops : min= 146, max= 260, avg=202.67, stdev=57.00, samples=3 write: IOPS=227, BW=909KiB/s (931kB/s)(1564KiB/1720msec) clat (usec): min=1114, max=38994, avg=2915.86, stdev=2368.14 lat (usec): min=1115, max=38996, avg=2916.86, stdev=2368.07 clat percentiles (usec): | 1.00th=[ 1319], 5.00th=[ 1500], 10.00th=[ 1631], 20.00th=[ 1926], | 30.00th=[ 2040], 40.00th=[ 2212], 50.00th=[ 2311], 60.00th=[ 2540], | 70.00th=[ 2900], 80.00th=[ 3556], 90.00th=[ 4686], 95.00th=[ 5735], | 99.00th=[12649], 99.50th=[13698], 99.90th=[39060], 99.95th=[39060], | 99.99th=[39060] bw ( KiB/s): min= 624, max= 1208, per=23.52%, avg=861.33, stdev=306.97, samples=3 iops : min= 156, max= 302, avg=215.33, stdev=76.74, samples=3 lat (usec) : 750=5.21%, 1000=17.84% lat (msec) : 2=29.30%, 4=37.11%, 10=10.03%, 20=0.39%, 50=0.13% cpu : usr=0.12%, sys=6.40%, ctx=836, majf=0, minf=32 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=3481KiB/s (3565kB/s), 842KiB/s-924KiB/s (862kB/s-947kB/s), io=5988KiB (6132kB), run=1671-1720msec WRITE: bw=3663KiB/s (3751kB/s), 891KiB/s-960KiB/s (913kB/s-983kB/s), io=6300KiB (6451kB), run=1671-1720msec