Re: [PATCH net-next v2 1/2] selftests/ptr_ring: add benchmark application for ptr_ring

在 2021/6/25 上午11:18, Yunsheng Lin 写道:

Currently ptr_ring selftest is embedded within the virtio
selftest, which involves some specific virtio operation,
such as notifying and kicking.

As ptr_ring has been used by various subsystems, it deserves
it's owner's selftest in order to benchmark different usecase
of ptr_ring, such as page pool and pfifo_fast qdisc.

So add a simple application to benchmark ptr_ring performance.
Currently two test mode is supported:
Mode 0: Both enqueuing and dequeuing is done in a single thread,
         it is called simple test mode in the test app.
Mode 1: Enqueuing and dequeuing is done in different thread
         concurrently, also known as SPSC(single-producer/
         single-consumer) test.

The multi-producer/single-consumer test for pfifo_fast case is
not added yet, which can be added if using CAS atomic operation
to enable lockless multi-producer is proved to be better than
using r->producer_lock.

Only supported on x86 and arm64 for now.

Signed-off-by: Yunsheng Lin <redacted>
---
  MAINTAINERS                                      |   5 +
  tools/testing/selftests/ptr_ring/Makefile        |   6 +
  tools/testing/selftests/ptr_ring/ptr_ring_test.c | 249 +++++++++++++++++++++++
  tools/testing/selftests/ptr_ring/ptr_ring_test.h | 150 ++++++++++++++
  4 files changed, 410 insertions(+)

Why can't you simply reuse tools/virtio/ringtest?

Thanks