[dpdk-dev] [PATCH] net/ice: enlarge ice RXQ rearm thresh to 64

[Zhang, Qi Z]

> -----Original Message-----
> From: Rong, Leyi <leyi.rong at intel.com>
> Sent: Wednesday, January 6, 2021 1:36 PM
> To: Zhang, Qi Z <qi.z.zhang at intel.com>; Lu, Wenzhuo <wenzhuo.lu at intel.com>
> Cc: dev at dpdk.org; Rong, Leyi <leyi.rong at intel.com>
> Subject: [PATCH] net/ice: enlarge ice RXQ rearm thresh to 64
> 
> We observe performance drop on ice AVX512 data path after stop and start by
> using testpmd.
> 
> As CPU polling is faster in AVX512 path, L3 contested accesses is intensified
> when rxrearm_start is a random value after testpmd stop/start.
> 
> Enlarge ICE_RXQ_REARM_THRESH to 64 to ease the contested asscesses and fix
> the performance drop issue.
> 
> Signed-off-by: Leyi Rong <leyi.rong at intel.com>


Acked-by: Qi Zhang <qi.z.zhang at intel.com>

Applied to dpdk-next-net-intel after add cc:stable tag.

Thanks
Qi