ez szar meres, mert iodepth=16, meg csak 100 mega.
itt egy jo meres:
root@s19:~# fio --filename=/dev/nvme0n1 --direct=1 --sync=1 --rw=write --bs=4k --numjobs=1 --iodepth=1 --runtime=60 --time_based --group_reporting --name=journal-test journal-test: (g=0): rw=write, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=psync, iodepth=1 fio-3.13 Starting 1 process Jobs: 1 (f=1): [W(1)][100.0%][w=217MiB/s][w=55.5k IOPS][eta 00m:00s] journal-test: (groupid=0, jobs=1): err= 0: pid=2689150: Fri Nov 1 22:07:09 2019 write: IOPS=55.6k, BW=217MiB/s (228MB/s)(12.7GiB/60001msec); 0 zone resets clat (usec): min=13, max=1749, avg=17.23, stdev= 3.80 lat (usec): min=13, max=1749, avg=17.33, stdev= 3.80 clat percentiles (nsec): | 1.00th=[14784], 5.00th=[15296], 10.00th=[15424], 20.00th=[15680], | 30.00th=[16064], 40.00th=[16192], 50.00th=[16768], 60.00th=[17280], | 70.00th=[17536], 80.00th=[17792], 90.00th=[18048], 95.00th=[18560], | 99.00th=[41216], 99.50th=[41728], 99.90th=[45824], 99.95th=[52992], | 99.99th=[84480] bw ( KiB/s): min=219328, max=225880, per=100.00%, avg=222454.19, stdev=1340.55, samples=119 iops : min=54832, max=56470, avg=55613.56, stdev=335.15, samples=119 lat (usec) : 20=97.35%, 50=2.60%, 100=0.05%, 250=0.01% lat (msec) : 2=0.01% cpu : usr=10.32%, sys=27.54%, ctx=3336824, 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=0,3336799,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=1 Run status group 0 (all jobs): WRITE: bw=217MiB/s (228MB/s), 217MiB/s-217MiB/s (228MB/s-228MB/s), io=12.7GiB (13.7GB), run=60001-60001msec Disk stats (read/write): nvme0n1: ios=44/3331054, merge=0/0, ticks=1/43653, in_queue=0, util=99.89% root@s19:~# nvme list | grep nvme0 /dev/nvme0n1 PHMB7363005X480DGN INTEL SSDPED1D480GA 1 480.10 GB / 480.10 GB 512 B + 0 B E2010325 root@s19:~#