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openvswitch: Per cpu flow stats.

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With mega flow implementation ovs flow can be shared between
multiple CPUs which makes stats updates highly contended
operation. This patch uses per-CPU stats in cases where a flow
is likely to be shared (if there is a wildcard in the 5-tuple
and therefore likely to be spread by RSS). In other situations,
it uses the current strategy, saving memory and allocation time.

Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
This commit is contained in:
Pravin B Shelar
2013-10-29 17:22:21 -07:00
committed by Jesse Gross
parent 795449d8b8
commit e298e50570
7 changed files with 210 additions and 55 deletions
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2
net/openvswitch/flow_table.h
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@ -55,7 +55,7 @@ struct flow_table {
int ovs_flow_init(void);
void ovs_flow_exit(void);
struct sw_flow *ovs_flow_alloc(void);
struct sw_flow *ovs_flow_alloc(bool percpu_stats);
void ovs_flow_free(struct sw_flow *, bool deferred);
int ovs_flow_tbl_init(struct flow_table *);