netdev - [PATCH net-next 0/6] net: page_pool: Add page

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Message-Id: <1643237300-44904-1-git-send-email-jdamato@fastly.com>
Date:   Wed, 26 Jan 2022 14:48:14 -0800
From:   Joe Damato <jdamato@...tly.com>
To:     netdev@...r.kernel.org
Cc:     kuba@...nel.org, davem@...emloft.net, ilias.apalodimas@...aro.org,
        hawk@...nel.org, Joe Damato <jdamato@...tly.com>
Subject: [PATCH net-next 0/6] net: page_pool: Add page_pool stat counters

Greetings:

This series adds some stat counters for the page_pool allocation path which
help to track:

	- fast path allocations
	- slow path order-0 allocations
	- slow path high order allocations
	- refills which failed due to an empty ptr ring, forcing a slow
	  path allocation
	- allocations fulfilled via successful refill
	- pages which cannot be added to the cache because of numa mismatch
	  (i.e. waived)

Some static inline wrappers are provided for accessing these stats. The
intention is that drivers which use the page_pool API can, if they choose,
use this stats API.

It assumed that the API consumer will ensure the page_pool is not destroyed
during calls to the stats API.

If this series is accepted, I'll submit a follow up patch which will export
these stats per RX-ring via ethtool in a driver which uses the page_pool
API.

Joe Damato (6):
  net: page_pool: Add alloc stats and fast path stat
  net: page_pool: Add a stat for the slow alloc path
  net: page_pool: Add a high order alloc stat
  net: page_pool: Add stat tracking empty ring
  net: page_pool: Add stat tracking cache refills.
  net: page_pool: Add a stat tracking waived pages.

 include/net/page_pool.h | 82 +++++++++++++++++++++++++++++++++++++++++++++++++
 net/core/page_pool.c    | 15 +++++++--
 2 files changed, 94 insertions(+), 3 deletions(-)

-- 
2.7.4