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Commit 07613873 authored by Jia He's avatar Jia He Committed by David S. Miller
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proc: Reduce cache miss in xfrm_statistics_seq_show 



This is to use the generic interfaces snmp_get_cpu_field{,64}_batch to
aggregate the data by going through all the items of each cpu sequentially.

Signed-off-by: default avatarJia He <hejianet@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 7d64a94b

net/xfrm/xfrm_proc.c

+8 −2
Original line number Diff line number Diff line
@@ -50,12 +50,18 @@ static const struct snmp_mib xfrm_mib_list[] = { 


static int xfrm_statistics_seq_show(struct seq_file *seq, void *v)

{

	unsigned long buff[LINUX_MIB_XFRMMAX];

	struct net *net = seq->private;

	int i;



	memset(buff, 0, sizeof(unsigned long) * LINUX_MIB_XFRMMAX);



	snmp_get_cpu_field_batch(buff, xfrm_mib_list,

				 net->mib.xfrm_statistics);

	for (i = 0; xfrm_mib_list[i].name; i++)

		seq_printf(seq, "%-24s\t%lu\n", xfrm_mib_list[i].name,

			   snmp_fold_field(net->mib.xfrm_statistics,

					   xfrm_mib_list[i].entry));

						buff[i]);



	return 0;

}