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| author | Jakub Kicinski <kuba@kernel.org> | 2023-11-26 15:07:38 -0800 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2023-11-28 15:48:39 +0100 |
| commit | d49010adae737638447369a4eff8f1aab736b076 (patch) | |
| tree | c627989bb9b26d93ddebaa6a2746d58619acdbd8 /Documentation/networking | |
| parent | 69cb4952b6f6a226c1c0a7ca400398aaa8f75cf2 (diff) | |
| download | linux-d49010adae737638447369a4eff8f1aab736b076.tar.gz | |
net: page_pool: expose page pool stats via netlink
Dump the stats into netlink. More clever approaches
like dumping the stats per-CPU for each CPU individually
to see where the packets get consumed can be implemented
in the future.
A trimmed example from a real (but recently booted system):
$ ./cli.py --no-schema --spec netlink/specs/netdev.yaml \
--dump page-pool-stats-get
[{'info': {'id': 19, 'ifindex': 2},
'alloc-empty': 48,
'alloc-fast': 3024,
'alloc-refill': 0,
'alloc-slow': 48,
'alloc-slow-high-order': 0,
'alloc-waive': 0,
'recycle-cache-full': 0,
'recycle-cached': 0,
'recycle-released-refcnt': 0,
'recycle-ring': 0,
'recycle-ring-full': 0},
{'info': {'id': 18, 'ifindex': 2},
'alloc-empty': 66,
'alloc-fast': 11811,
'alloc-refill': 35,
'alloc-slow': 66,
'alloc-slow-high-order': 0,
'alloc-waive': 0,
'recycle-cache-full': 1145,
'recycle-cached': 6541,
'recycle-released-refcnt': 0,
'recycle-ring': 1275,
'recycle-ring-full': 0},
{'info': {'id': 17, 'ifindex': 2},
'alloc-empty': 73,
'alloc-fast': 62099,
'alloc-refill': 413,
...
Acked-by: Jesper Dangaard Brouer <hawk@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'Documentation/networking')
| -rw-r--r-- | Documentation/networking/page_pool.rst | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/Documentation/networking/page_pool.rst b/Documentation/networking/page_pool.rst index 60993cb56b3254..9d958128a57cbc 100644 --- a/Documentation/networking/page_pool.rst +++ b/Documentation/networking/page_pool.rst @@ -41,6 +41,11 @@ Architecture overview | Fast cache | | ptr-ring cache | +-----------------+ +------------------+ +Monitoring +========== +Information about page pools on the system can be accessed via the netdev +genetlink family (see Documentation/netlink/specs/netdev.yaml). + API interface ============= The number of pools created **must** match the number of hardware queues @@ -107,8 +112,9 @@ page_pool_get_stats() and structures described below are available. It takes a pointer to a ``struct page_pool`` and a pointer to a struct page_pool_stats allocated by the caller. -The API will fill in the provided struct page_pool_stats with -statistics about the page_pool. +Older drivers expose page pool statistics via ethtool or debugfs. +The same statistics are accessible via the netlink netdev family +in a driver-independent fashion. .. kernel-doc:: include/net/page_pool/types.h :identifiers: struct page_pool_recycle_stats |