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Commit 8d6e8215 authored by Patrick Daly's avatar Patrick Daly
Browse files

psi: Improve ftrace events 



Improve readability of logs by converting hex values to decimal,
and printing memstall deltas instead of absolute values.

Change-Id: I43f21dd9817b540184ce05fd7151459d3502ea28
Signed-off-by: default avatarPatrick Daly <pdaly@codeaurora.org>
parent b482dc81

include/trace/events/psi.h

+9 −7
Original line number Diff line number Diff line
@@ -14,13 +14,14 @@ 


TRACE_EVENT(psi_window_vmstat,



	TP_PROTO(u64 memstall, const char *zone_name, u64 high,

	TP_PROTO(u64 mem_some, u64 mem_full, const char *zone_name, u64 high,

		u64 free, u64 cma, u64 file),



	TP_ARGS(memstall, zone_name, high, free, cma, file),

	TP_ARGS(mem_some, mem_full, zone_name, high, free, cma, file),



	TP_STRUCT__entry(

		__field(u64, memstall)

		__field(u64, mem_some)

		__field(u64, mem_full)

		__string(name, zone_name)

		__field(u64, high)

		__field(u64, free)
@@ -29,7 +30,8 @@ TRACE_EVENT(psi_window_vmstat, 
	),



	TP_fast_assign(

		__entry->memstall = memstall;

		__entry->mem_some = mem_some;

		__entry->mem_full = mem_full;

		__assign_str(name, zone_name);

		__entry->high = high;

		__entry->free = free;
@@ -37,9 +39,9 @@ TRACE_EVENT(psi_window_vmstat, 
		__entry->file = file;

	),



	TP_printk("%16s: Memstall: %#16llx High: %#8llx Free: %#8llx CMA: %#8llx File: %#8llx",

		__get_str(name), __entry->memstall,  __entry->high,

		__entry->free, __entry->cma, __entry->file

	TP_printk("%16s: MEMSOME: %9lluns MEMFULL: %9lluns High: %9llukB Free: %9llukB CMA: %8llukB File: %9llukB",

		__get_str(name), __entry->mem_some, __entry->mem_full,

		__entry->high, __entry->free, __entry->cma, __entry->file

	)

);

kernel/sched/psi.c

+16 −8
Original line number Diff line number Diff line
@@ -445,6 +445,9 @@ static void psi_avgs_work(struct work_struct *work) 
}



#ifdef CONFIG_PSI_FTRACE



#define TOKB(x) ((x) * (PAGE_SIZE / 1024))



static void trace_event_helper(struct psi_group *group)

{

	struct zone *zone;
@@ -452,17 +455,22 @@ static void trace_event_helper(struct psi_group *group) 
	unsigned long free;

	unsigned long cma;

	unsigned long file;

	u64 memstall = group->total[PSI_POLL][PSI_MEM_SOME];



	u64 mem_some_delta = group->total[PSI_POLL][PSI_MEM_SOME] -

			group->polling_total[PSI_MEM_SOME];

	u64 mem_full_delta = group->total[PSI_POLL][PSI_MEM_FULL] -

			group->polling_total[PSI_MEM_FULL];



	for_each_populated_zone(zone) {

		wmark = high_wmark_pages(zone);

		free = zone_page_state(zone, NR_FREE_PAGES);

		cma = zone_page_state(zone, NR_FREE_CMA_PAGES);

		file = zone_page_state(zone, NR_ZONE_ACTIVE_FILE) +

			zone_page_state(zone, NR_ZONE_INACTIVE_FILE);

		wmark = TOKB(high_wmark_pages(zone));

		free = TOKB(zone_page_state(zone, NR_FREE_PAGES));

		cma = TOKB(zone_page_state(zone, NR_FREE_CMA_PAGES));

		file = TOKB(zone_page_state(zone, NR_ZONE_ACTIVE_FILE) +

			zone_page_state(zone, NR_ZONE_INACTIVE_FILE));



		trace_psi_window_vmstat(

			memstall, zone->name, wmark, free, cma, file);

			mem_some_delta, mem_full_delta, zone->name, wmark,

			free, cma, file);

	}

}

#else
@@ -571,6 +579,7 @@ static u64 update_triggers(struct psi_group *group, u64 now) 
		t->last_event_time = now;

	}



	trace_event_helper(group);

	if (new_stall)

		memcpy(group->polling_total, total,

				sizeof(group->polling_total));
@@ -637,7 +646,6 @@ static void psi_poll_work(struct kthread_work *work) 
		 */

		group->polling_until = now +

			group->poll_min_period * UPDATES_PER_WINDOW;

		trace_event_helper(group);

	}



	if (now > group->polling_until) {