diff options
| author | glebius <glebius@FreeBSD.org> | 2013-10-09 19:04:40 +0000 |
|---|---|---|
| committer | glebius <glebius@FreeBSD.org> | 2013-10-09 19:04:40 +0000 |
| commit | 75528d8e36fb23734af42c83fe710155dc3e2d5c (patch) | |
| tree | a73da61112c51368ee56913bcb5771167291b7ca /sys/net | |
| parent | 57b95400601bfa18b78d342b43a877efa06e81d1 (diff) | |
| download | FreeBSD-src-75528d8e36fb23734af42c83fe710155dc3e2d5c.zip FreeBSD-src-75528d8e36fb23734af42c83fe710155dc3e2d5c.tar.gz | |
There are some high performance NICs that count statistics in hardware,
and there are ifnets, that do that via counter(9). Provide a flag that
would skip cache line trashing '+=' operation in ether_input().
Sponsored by: Netflix
Sponsored by: Nginx, Inc.
Reviewed by: melifaro, adrian
Approved by: re (marius)
Diffstat (limited to 'sys/net')
| -rw-r--r-- | sys/net/if.h | 1 | ||||
| -rw-r--r-- | sys/net/if_ethersubr.c | 3 | ||||
| -rw-r--r-- | sys/net/if_lagg.c | 1 |
3 files changed, 4 insertions, 1 deletions
diff --git a/sys/net/if.h b/sys/net/if.h index ab98ec0..80a7112 100644 --- a/sys/net/if.h +++ b/sys/net/if.h @@ -231,6 +231,7 @@ struct if_data { #define IFCAP_NETMAP 0x100000 /* netmap mode supported/enabled */ #define IFCAP_RXCSUM_IPV6 0x200000 /* can offload checksum on IPv6 RX */ #define IFCAP_TXCSUM_IPV6 0x400000 /* can offload checksum on IPv6 TX */ +#define IFCAP_HWSTATS 0x800000 /* manages counters internally */ #define IFCAP_HWCSUM_IPV6 (IFCAP_RXCSUM_IPV6 | IFCAP_TXCSUM_IPV6) diff --git a/sys/net/if_ethersubr.c b/sys/net/if_ethersubr.c index 638b364..d5c5521 100644 --- a/sys/net/if_ethersubr.c +++ b/sys/net/if_ethersubr.c @@ -528,7 +528,8 @@ ether_input_internal(struct ifnet *ifp, struct mbuf *m) m->m_flags &= ~M_HASFCS; } - ifp->if_ibytes += m->m_pkthdr.len; + if (!(ifp->if_capenable & IFCAP_HWSTATS)) + ifp->if_ibytes += m->m_pkthdr.len; /* Allow monitor mode to claim this frame, after stats are updated. */ if (ifp->if_flags & IFF_MONITOR) { diff --git a/sys/net/if_lagg.c b/sys/net/if_lagg.c index 27bab87..258c2f9 100644 --- a/sys/net/if_lagg.c +++ b/sys/net/if_lagg.c @@ -347,6 +347,7 @@ lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params) ifp->if_init = lagg_init; ifp->if_ioctl = lagg_ioctl; ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; + ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS; /* * Attach as an ordinary ethernet device, children will be attached |
