Changes between Version 46 and Version 47 of malibu/gw3089gblade


Ignore:
Timestamp:
05/05/2023 05:00:20 PM (12 months ago)
Author:
Tim Harvey
Comment:

updated NVMe performance and test (remove misleading info about hdparm)

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  • malibu/gw3089gblade

    v46 v47  
    6666
    6767** Example NVME speed tests with a Samsung 980 drive
    68 Note for this example the hdparm utility is used which provides more direct access to the drive versus using a dd command which much go through the OS and has a lot of overhead.
    69 
    70 {{{
    71 root@jammy-malibu:~# dd if=/dev/nvme0n1 of=/dev/null bs=1M count=10k
     68{{{#!bash
     69root@jammy-malibu:~# dd if=/dev/nvme0n1 of=/dev/null bs=1M count=10k iflag=direct
    727010240+0 records in
    737110240+0 records out
    74 10737418240 bytes (11 GB, 10 GiB) copied, 14.9507 s, 718 MB/s
    75 
    76 root@jammy-malibu:~# sudo hdparm -tT --direct /dev/nvme0n1
    77 /dev/nvme0n1:
    78  Timing O_DIRECT cached reads:   3068 MB in  2.00 seconds = 1535.23 MB/sec
    79  Timing O_DIRECT disk reads: 4710 MB in  3.00 seconds = 1569.63 MB/sec
    80 
     7210737418240 bytes (11 GB, 10 GiB) copied, 5.80117 s, 1.9 GB/s
    8173}}}
    8274