diff options
| author | Ido Schimmel <idosch@nvidia.com> | 2024-03-06 13:49:17 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2024-03-08 11:35:46 +0100 |
| commit | f4676ea74b8549cd88dbfe2a592ce4530039e61f (patch) | |
| tree | 952b4cb513c2bf7a94f3258e3efb020db76c4789 /include/net | |
| parent | net: nexthop: Add NHA_OP_FLAGS (diff) | |
| download | linux-f4676ea74b8549cd88dbfe2a592ce4530039e61f.tar.xz linux-f4676ea74b8549cd88dbfe2a592ce4530039e61f.zip | |
net: nexthop: Add nexthop group entry stats
Add nexthop group entry stats to count the number of packets forwarded
via each nexthop in the group. The stats will be exposed to user space
for better data path observability in the next patch.
The per-CPU stats pointer is placed at the beginning of 'struct
nh_grp_entry', so that all the fields accessed for the data path reside
on the same cache line:
struct nh_grp_entry {
struct nexthop * nh; /* 0 8 */
struct nh_grp_entry_stats * stats; /* 8 8 */
u8 weight; /* 16 1 */
/* XXX 7 bytes hole, try to pack */
union {
struct {
atomic_t upper_bound; /* 24 4 */
} hthr; /* 24 4 */
struct {
struct list_head uw_nh_entry; /* 24 16 */
u16 count_buckets; /* 40 2 */
u16 wants_buckets; /* 42 2 */
} res; /* 24 24 */
}; /* 24 24 */
struct list_head nh_list; /* 48 16 */
/* --- cacheline 1 boundary (64 bytes) --- */
struct nexthop * nh_parent; /* 64 8 */
/* size: 72, cachelines: 2, members: 6 */
/* sum members: 65, holes: 1, sum holes: 7 */
/* last cacheline: 8 bytes */
};
Co-developed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/nexthop.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/net/nexthop.h b/include/net/nexthop.h index 77e99cba60ad..6e6a36fee51e 100644 --- a/include/net/nexthop.h +++ b/include/net/nexthop.h @@ -95,8 +95,14 @@ struct nh_res_table { struct nh_res_bucket nh_buckets[] __counted_by(num_nh_buckets); }; +struct nh_grp_entry_stats { + u64_stats_t packets; + struct u64_stats_sync syncp; +}; + struct nh_grp_entry { struct nexthop *nh; + struct nh_grp_entry_stats __percpu *stats; u8 weight; union { |