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authorJia He <hejianet@gmail.com>2016-09-30 06:29:02 +0300
committerDavid S. Miller <davem@davemloft.net>2016-09-30 08:50:45 +0300
commit07613873f1731aa47fdf06a1cbd2e3cd1974c026 (patch)
treea6b3008f9c31c048ab595ef39db5929ffb294d9c /net/xfrm
parent7d64a94be2f9fadb1dd95742650f1fdbac69f25b (diff)
downloadlinux-07613873f1731aa47fdf06a1cbd2e3cd1974c026.tar.xz
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: Jia He <hejianet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/xfrm')
-rw-r--r--net/xfrm/xfrm_proc.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/net/xfrm/xfrm_proc.c b/net/xfrm/xfrm_proc.c
index 9c4fbd8935f4..ba2b539879bc 100644
--- a/net/xfrm/xfrm_proc.c
+++ b/net/xfrm/xfrm_proc.c
@@ -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;
}