[dpdk-dev] [PATCH] app/test-crypto-perf: improve dequeue logic

Zhang, Roy Fan roy.fan.zhang at intel.com
Wed Mar 27 16:20:12 CET 2019

Hi Akhil,

This patch seems introduced performance degradation on my server with
QAT DH895XCC by more than 10% for big packets (>=256).

Fiona/Pablo, could you have a try with it?


> -----Original Message-----
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Akhil Goyal
> Sent: Wednesday, March 27, 2019 11:48 AM
> To: dev at dpdk.org
> Cc: Doherty, Declan <declan.doherty at intel.com>; Akhil Goyal
> <akhil.goyal at nxp.com>
> Subject: [dpdk-dev] [PATCH] app/test-crypto-perf: improve dequeue logic
> In case of hardware PMDs (which may take a longer duration for processing
> the packets), there may be a case when the number of enqueued packets
> are more than the dequeued.
> So if the difference is more than 8 times the burst size, more dequeue
> operations should be performed otherwise all the buffers will be blocked in
> hardware.
> Signed-off-by: Akhil Goyal <akhil.goyal at nxp.com>
> ---

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