[dpdk-dev] [PATCH] app/testpmd: adds mlockall() to fix pages

Eelco Chaudron echaudro at redhat.com
Fri Sep 29 10:15:19 CEST 2017


On 29/09/17 10:07, Sergio Gonzalez Monroy wrote:
> On 12/09/2017 14:08, Eelco Chaudron wrote:
>> Call the mlockall() function, to attempt to lock all of its process
>> memory into physical RAM, and preventing the kernel from paging any
>> of its memory to disk.
>>
>> When using testpmd for performance testing, depending on the code path
>> taken, we see a couple of page faults in a row. These faults effect
>> the overall drop-rate of testpmd. On Linux the mlockall() call will
>> prefault all the pages of testpmd (and the DPDK libraries if linked
>> dynamically), even without LD_BIND_NOW.
>>
>> Signed-off-by: Eelco Chaudron <echaudro at redhat.com>
>> ---
>
> When used for performance testing using hugepages or --no-huge option?
This is independent of huge pages, its for the text (code) sections.


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