[Pmem] [PATCH 01/15] memory tiering: add trace point for threshold adjustment

From: Huang Ying <ying.huang(a)intel.com> ANBZ: #80 cherry-picked from https://git.kernel.org/pub/scm/linux/kernel/git/vishal/tiering.git/commit/?… To help to debug the threshold adjustment algorithm. Signed-off-by: "Huang, Ying" <ying.huang(a)intel.com> Signed-off-by: Baolin Wang <baolin.wang(a)linux.alibaba.com> --- include/trace/events/sched.h | 24 ++++++++++++++++++++++++ kernel/sched/fair.c | 1 + 2 files changed, 25 insertions(+) diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h index 9a4bdfa..d36b9a3 100644 --- a/include/trace/events/sched.h +++ b/include/trace/events/sched.h @@ -51,6 +51,30 @@ TP_printk("ret=%d", __entry->ret) ); +TRACE_EVENT(autonuma_threshold, + + TP_PROTO(int nid, + long nr_candidate, + int threshold), + + TP_ARGS(nid, nr_candidate, threshold), + + TP_STRUCT__entry( + __field( int, nid ) + __field( long, nr_candidate ) + __field( int, threshold ) + ), + + TP_fast_assign( + __entry->nid = nid; + __entry->nr_candidate = nr_candidate; + __entry->threshold = threshold; + ), + + TP_printk("nid=%d nr_candidate=%ld threshold=%d", + __entry->nid, __entry->nr_candidate, __entry->threshold) +); + /* * Tracepoint for waking up a task: */ diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 143d689..fc954e1 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -2949,6 +2949,7 @@ static void numa_migration_adjust_threshold(struct pglist_data *pgdat, th = min(th + unit_th, ref_th); pgdat->numa_threshold_nr_candidate = nr_cand; pgdat->numa_threshold = th; + trace_autonuma_threshold(pgdat->node_id, diff_cand, th); } } -- 1.8.3.1