Re: [dpdk-dev] [PATCH v4] net/ice: fix performance issue for Rx timestamp

["Zhang, Qi Z" <qi.z.zhang@intel.com>]

> -----Original Message-----
> From: Su, Simei <simei.su@intel.com>
> Sent: Friday, October 29, 2021 8:56 PM
> To: Zhang, Qi Z <qi.z.zhang@intel.com>
> Cc: dev@dpdk.org; Van Haaren, Harry <harry.van.haaren@intel.com>; Wu,
> Wenjun1 <wenjun1.wu@intel.com>; Su, Simei <simei.su@intel.com>
> Subject: [PATCH v4] net/ice: fix performance issue for Rx timestamp
> 
> In Rx data path, it reads hardware registers per packet, resulting in big
> performance drop. This patch improves performance from two aspects:
> (1) replace per packet hardware register read by per burst.
> (2) reduce hardware register read time from 3 to 2 when the low value of
>     time is not close to overflow.
> 
> Meanwhile, this patch refines "ice_timesync_read_rx_timestamp" and
> "ice_timesync_read_tx_timestamp" API in which
> "ice_tstamp_convert_32b_64b"
> is also used.
> 
> Fixes: 953e74e6b73a ("net/ice: enable Rx timestamp on flex descriptor")
> Fixes: 646dcbe6c701 ("net/ice: support IEEE 1588 PTP")
> 
> Suggested-by: Harry van Haaren <harry.van.haaren@intel.com>
> Signed-off-by: Simei Su <simei.su@intel.com>

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

Applied to dpdk-next-net-intel.

Thanks
Qi