RE: [PATCH v3 0/3] add pointer compression API

["Morten Brørup" <mb@smartsharesystems.com>]

> From: Paul Szczepanek [mailto:paul.szczepanek@arm.com]
> Sent: Tuesday, 31 October 2023 19.11

[...]

> Test is added that shows potential performance gain from compression.
> In
> this test an array of pointers is passed through a ring between two
> cores.
> It shows the gain which is dependent on the bulk operation size. In
> this
> synthetic test run on ampere altra a substantial (up to 25%)
> performance
> gain is seen if done in bulk size larger than 32. At 32 it breaks even
> and
> lower sizes create a small (less than 5%) slowdown due to overhead.
> 
> In a more realistic mock application running the l3 forwarding dpdk
> example that works in pipeline mode this translated into a ~5%
> throughput
> increase on an ampere altra.

What was the bulk size in this test?

And were the pipeline stages running on the same lcore or individual lcores per pipeline stage?