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Commit 14a19680 authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

net: reorganize IP MIB values 



Reduce IP latencies by placing hot MIB IP fields in a single cache line.

Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d25398df

include/linux/snmp.h

+7 −5
Original line number Diff line number Diff line
@@ -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 */