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net: page_pool: expose page pool stats via netlink

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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>
This commit is contained in:
Jakub Kicinski
2023-11-26 15:07:38 -08:00
committed by Paolo Abeni
parent 69cb4952b6
commit d49010adae
8 changed files with 250 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/uapi/linux/netdev.h
+19
View File
@@ -76,6 +76,24 @@ enum {
NETDEV_A_PAGE_POOL_MAX = (__NETDEV_A_PAGE_POOL_MAX - 1)
};
enum {
NETDEV_A_PAGE_POOL_STATS_INFO = 1,
NETDEV_A_PAGE_POOL_STATS_ALLOC_FAST = 8,
NETDEV_A_PAGE_POOL_STATS_ALLOC_SLOW,
NETDEV_A_PAGE_POOL_STATS_ALLOC_SLOW_HIGH_ORDER,
NETDEV_A_PAGE_POOL_STATS_ALLOC_EMPTY,
NETDEV_A_PAGE_POOL_STATS_ALLOC_REFILL,
NETDEV_A_PAGE_POOL_STATS_ALLOC_WAIVE,
NETDEV_A_PAGE_POOL_STATS_RECYCLE_CACHED,
NETDEV_A_PAGE_POOL_STATS_RECYCLE_CACHE_FULL,
NETDEV_A_PAGE_POOL_STATS_RECYCLE_RING,
NETDEV_A_PAGE_POOL_STATS_RECYCLE_RING_FULL,
NETDEV_A_PAGE_POOL_STATS_RECYCLE_RELEASED_REFCNT,
__NETDEV_A_PAGE_POOL_STATS_MAX,
NETDEV_A_PAGE_POOL_STATS_MAX = (__NETDEV_A_PAGE_POOL_STATS_MAX - 1)
};
enum {
NETDEV_CMD_DEV_GET = 1,
NETDEV_CMD_DEV_ADD_NTF,
@@ -85,6 +103,7 @@ enum {
NETDEV_CMD_PAGE_POOL_ADD_NTF,
NETDEV_CMD_PAGE_POOL_DEL_NTF,
NETDEV_CMD_PAGE_POOL_CHANGE_NTF,
NETDEV_CMD_PAGE_POOL_STATS_GET,
__NETDEV_CMD_MAX,
NETDEV_CMD_MAX = (__NETDEV_CMD_MAX - 1)