ivampiresp/Spdk
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

fio_plugin: add norandommap=1 recommendation to README

Browse Source 
While here, also mention that the plugin only supports
a single thread currently.

Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I265e59a89e77cd8ed26419e811aa2f36afcd37b3
This commit is contained in:
Jim Harris 2016-08-02 09:28:44 -07:00 committed by Daniel Verkamp
parent d95d6822f9
commit a2fbd991cd
1 changed files with 6 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
examples/nvme/fio_plugin/README.md
View File

@ -38,3 +38,9 @@ To select NVMe devices, you simply pass an identifier as the filename in the for
Remember that NVMe namespaces start at 1, not 0! Also, the notation uses '.' throughout,
not ':'. For example - 0000.04.00.0/1.
Currently the fio_plugin is limited to a single thread, so only one job is supported.
When testing random workloads, it is recommended to set norandommap=1. fio's random map
processing consumes extra CPU cycles which will degrade performance over time with
the fio_plugin since all I/O are submitted and completed on a single CPU core.