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authorFlorian Westphal <fw@strlen.de>2016-07-04 17:22:20 +0300
committerDavid S. Miller <davem@davemloft.net>2016-07-09 06:08:39 +0300
commitbba7eb5d9b4ebccacd30331121ee29764212a29d (patch)
treef14f32051ed7e9266c1117425d4904b5097cbf15 /net/sched/sch_hfsc.c
parenta90a6e55f34f28190e4dc2a6a3660ef157827a8f (diff)
downloadlinux-bba7eb5d9b4ebccacd30331121ee29764212a29d.tar.xz
hfsc: reduce hfsc_sched to 14 cachelines
hfsc_sched is huge (size: 920, cachelines: 15), but we can get it to 14 cachelines by placing level after filter_cnt (covering 4 byte hole) and reducing period/nactive/flags to u32 (period is just a counter, incremented when class becomes active -- 2**32 is plenty for this purpose, also, long is only 32bit wide on 32bit platforms anyway). cl_vtperiod is exported to userspace via tc_hfsc_stats, but its period member is already u32, so no precision is lost there either. Cc: Michal Soltys <soltys@ziu.info> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/sch_hfsc.c')
-rw-r--r--net/sched/sch_hfsc.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/net/sched/sch_hfsc.c b/net/sched/sch_hfsc.c
index dff92ea772fe..3ddc7bd74ecb 100644
--- a/net/sched/sch_hfsc.c
+++ b/net/sched/sch_hfsc.c
@@ -115,9 +115,9 @@ struct hfsc_class {
struct gnet_stats_basic_packed bstats;
struct gnet_stats_queue qstats;
struct gnet_stats_rate_est64 rate_est;
- unsigned int level; /* class level in hierarchy */
struct tcf_proto __rcu *filter_list; /* filter list */
unsigned int filter_cnt; /* filter count */
+ unsigned int level; /* class level in hierarchy */
struct hfsc_sched *sched; /* scheduler data */
struct hfsc_class *cl_parent; /* parent class */
@@ -165,10 +165,10 @@ struct hfsc_class {
struct runtime_sc cl_virtual; /* virtual curve */
struct runtime_sc cl_ulimit; /* upperlimit curve */
- unsigned long cl_flags; /* which curves are valid */
- unsigned long cl_vtperiod; /* vt period sequence number */
- unsigned long cl_parentperiod;/* parent's vt period sequence number*/
- unsigned long cl_nactive; /* number of active children */
+ u8 cl_flags; /* which curves are valid */
+ u32 cl_vtperiod; /* vt period sequence number */
+ u32 cl_parentperiod;/* parent's vt period sequence number*/
+ u32 cl_nactive; /* number of active children */
};
struct hfsc_sched {