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Commit 7d64a94b authored by Jia He's avatar Jia He Committed by David S. Miller
Browse files

proc: Reduce cache miss in sctp_snmp_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 4a4857b1

net/sctp/proc.c

+6 −2
Original line number Diff line number Diff line
@@ -73,13 +73,17 @@ static const struct snmp_mib sctp_snmp_list[] = { 
/* Display sctp snmp mib statistics(/proc/net/sctp/snmp). */

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

{

	unsigned long buff[SCTP_MIB_MAX];

	struct net *net = seq->private;

	int i;



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



	snmp_get_cpu_field_batch(buff, sctp_snmp_list,

				 net->sctp.sctp_statistics);

	for (i = 0; sctp_snmp_list[i].name != NULL; i++)

		seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name,

			   snmp_fold_field(net->sctp.sctp_statistics,

				      sctp_snmp_list[i].entry));

						buff[i]);



	return 0;

}