diff options
| author | Eric Dumazet <edumazet@google.com> | 2012-08-04 16:33:59 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-08-06 16:40:47 -0400 |
| commit | 14a196807482e6fc74f15fc03176d5c08880588f (patch) | |
| tree | 7d6057c408177156d4467c1399c9d91750e7062d /include/linux/snmp.h | |
| parent | d25398df59b561a26cb4000ceb4dea8a3ff94d22 (diff) | |
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 @@ | |||
| 18 | enum | 18 | enum |
| 19 | { | 19 | { |
| 20 | IPSTATS_MIB_NUM = 0, | 20 | IPSTATS_MIB_NUM = 0, |
| 21 | /* frequently written fields in fast path, kept in same cache line */ | ||
| 21 | IPSTATS_MIB_INPKTS, /* InReceives */ | 22 | IPSTATS_MIB_INPKTS, /* InReceives */ |
| 23 | IPSTATS_MIB_INOCTETS, /* InOctets */ | ||
| 24 | IPSTATS_MIB_INDELIVERS, /* InDelivers */ | ||
| 25 | IPSTATS_MIB_OUTFORWDATAGRAMS, /* OutForwDatagrams */ | ||
| 26 | IPSTATS_MIB_OUTPKTS, /* OutRequests */ | ||
| 27 | IPSTATS_MIB_OUTOCTETS, /* OutOctets */ | ||
| 28 | /* other fields */ | ||
| 22 | IPSTATS_MIB_INHDRERRORS, /* InHdrErrors */ | 29 | IPSTATS_MIB_INHDRERRORS, /* InHdrErrors */ |
| 23 | IPSTATS_MIB_INTOOBIGERRORS, /* InTooBigErrors */ | 30 | IPSTATS_MIB_INTOOBIGERRORS, /* InTooBigErrors */ |
| 24 | IPSTATS_MIB_INNOROUTES, /* InNoRoutes */ | 31 | IPSTATS_MIB_INNOROUTES, /* InNoRoutes */ |
| @@ -26,9 +33,6 @@ enum | |||
| 26 | IPSTATS_MIB_INUNKNOWNPROTOS, /* InUnknownProtos */ | 33 | IPSTATS_MIB_INUNKNOWNPROTOS, /* InUnknownProtos */ |
| 27 | IPSTATS_MIB_INTRUNCATEDPKTS, /* InTruncatedPkts */ | 34 | IPSTATS_MIB_INTRUNCATEDPKTS, /* InTruncatedPkts */ |
| 28 | IPSTATS_MIB_INDISCARDS, /* InDiscards */ | 35 | IPSTATS_MIB_INDISCARDS, /* InDiscards */ |
| 29 | IPSTATS_MIB_INDELIVERS, /* InDelivers */ | ||
| 30 | IPSTATS_MIB_OUTFORWDATAGRAMS, /* OutForwDatagrams */ | ||
| 31 | IPSTATS_MIB_OUTPKTS, /* OutRequests */ | ||
| 32 | IPSTATS_MIB_OUTDISCARDS, /* OutDiscards */ | 36 | IPSTATS_MIB_OUTDISCARDS, /* OutDiscards */ |
| 33 | IPSTATS_MIB_OUTNOROUTES, /* OutNoRoutes */ | 37 | IPSTATS_MIB_OUTNOROUTES, /* OutNoRoutes */ |
| 34 | IPSTATS_MIB_REASMTIMEOUT, /* ReasmTimeout */ | 38 | IPSTATS_MIB_REASMTIMEOUT, /* ReasmTimeout */ |
| @@ -42,8 +46,6 @@ enum | |||
| 42 | IPSTATS_MIB_OUTMCASTPKTS, /* OutMcastPkts */ | 46 | IPSTATS_MIB_OUTMCASTPKTS, /* OutMcastPkts */ |
| 43 | IPSTATS_MIB_INBCASTPKTS, /* InBcastPkts */ | 47 | IPSTATS_MIB_INBCASTPKTS, /* InBcastPkts */ |
| 44 | IPSTATS_MIB_OUTBCASTPKTS, /* OutBcastPkts */ | 48 | IPSTATS_MIB_OUTBCASTPKTS, /* OutBcastPkts */ |
| 45 | IPSTATS_MIB_INOCTETS, /* InOctets */ | ||
| 46 | IPSTATS_MIB_OUTOCTETS, /* OutOctets */ | ||
| 47 | IPSTATS_MIB_INMCASTOCTETS, /* InMcastOctets */ | 49 | IPSTATS_MIB_INMCASTOCTETS, /* InMcastOctets */ |
| 48 | IPSTATS_MIB_OUTMCASTOCTETS, /* OutMcastOctets */ | 50 | IPSTATS_MIB_OUTMCASTOCTETS, /* OutMcastOctets */ |
| 49 | IPSTATS_MIB_INBCASTOCTETS, /* InBcastOctets */ | 51 | IPSTATS_MIB_INBCASTOCTETS, /* InBcastOctets */ |