> From: Eads, Gage > Sent: Monday, March 12, 2018 2:55 PM > To: [email protected] > Cc: [email protected]; Van Haaren, Harry > <[email protected]> > Subject: [PATCH v2] event/sw: perform partial burst enqueues > > Previously, the sw PMD would enqueue either all or no events, depending on > if enough inflight credits were available for the new events in the burst. > If a port is enqueueing a large burst (i.e. a multiple of the credit update > quanta), this can result in suboptimal performance, and requires an > understanding of the sw PMD implementation (in particular, its credit > scheme) to tune an application's burst size. > > This affects software that enqueues large bursts of new events, such as the > ethernet event adapter which uses a 128-deep event buffer, when the input > packet rate is sufficiently high. > > This change makes the sw PMD enqueue as many events as it has credits, if > there are any new events in the burst. > > Signed-off-by: Gage Eads <[email protected]>
Agree that making forward progress by enqueuing what we have credits for makes sense for the application. No performance degradation here, thanks for the patch: Acked-by: Harry van Haaren <[email protected]>
