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| author |   Eric Dumazet <edumazet@google.com> | 2012-08-04 20:33:59 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2012-08-06 13:40:47 -0700 |
| commit | 14a196807482e6fc74f15fc03176d5c08880588f (patch) | |
| tree | 7d6057c408177156d4467c1399c9d91750e7062d /include/linux/snmp.h | |
| parent | net: avoid reloads in SNMP_UPD_PO_STATS (diff) | |
| download | linux-dev-14a196807482e6fc74f15fc03176d5c08880588f.tar.xz linux-dev-14a196807482e6fc74f15fc03176d5c08880588f.zip | |
net: reorganize IP MIB values
Reduce IP latencies by placing hot MIB IP fields in a single cache line.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/snmp.h')
| -rw-r--r-- | include/linux/snmp.h | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/include/linux/snmp.h b/include/linux/snmp.h index 00bc189cb395..ad6e3a6bf9fb 100644 --- a/include/linux/snmp.h +++ b/include/linux/snmp.h @@ -18,7 +18,14 @@ enum { IPSTATS_MIB_NUM = 0, +/* frequently written fields in fast path, kept in same cache line */ IPSTATS_MIB_INPKTS, /* InReceives */ + IPSTATS_MIB_INOCTETS, /* InOctets */ + IPSTATS_MIB_INDELIVERS, /* InDelivers */ + IPSTATS_MIB_OUTFORWDATAGRAMS, /* OutForwDatagrams */ + IPSTATS_MIB_OUTPKTS, /* OutRequests */ + IPSTATS_MIB_OUTOCTETS, /* OutOctets */ +/* other fields */ IPSTATS_MIB_INHDRERRORS, /* InHdrErrors */ IPSTATS_MIB_INTOOBIGERRORS, /* InTooBigErrors */ IPSTATS_MIB_INNOROUTES, /* InNoRoutes */ @@ -26,9 +33,6 @@ enum IPSTATS_MIB_INUNKNOWNPROTOS, /* InUnknownProtos */ IPSTATS_MIB_INTRUNCATEDPKTS, /* InTruncatedPkts */ IPSTATS_MIB_INDISCARDS, /* InDiscards */ - IPSTATS_MIB_INDELIVERS, /* InDelivers */ - IPSTATS_MIB_OUTFORWDATAGRAMS, /* OutForwDatagrams */ - IPSTATS_MIB_OUTPKTS, /* OutRequests */ IPSTATS_MIB_OUTDISCARDS, /* OutDiscards */ IPSTATS_MIB_OUTNOROUTES, /* OutNoRoutes */ IPSTATS_MIB_REASMTIMEOUT, /* ReasmTimeout */ @@ -42,8 +46,6 @@ enum IPSTATS_MIB_OUTMCASTPKTS, /* OutMcastPkts */ IPSTATS_MIB_INBCASTPKTS, /* InBcastPkts */ IPSTATS_MIB_OUTBCASTPKTS, /* OutBcastPkts */ - IPSTATS_MIB_INOCTETS, /* InOctets */ - IPSTATS_MIB_OUTOCTETS, /* OutOctets */ IPSTATS_MIB_INMCASTOCTETS, /* InMcastOctets */ IPSTATS_MIB_OUTMCASTOCTETS, /* OutMcastOctets */ IPSTATS_MIB_INBCASTOCTETS, /* InBcastOctets */ |