Commit de04fa74 authored by Jim Harris's avatar Jim Harris Committed by Tomasz Zawadzki
Browse files

scheduler/dynamic: add helper function to calculate busy pct 



This will be useful in some upcoming patches where we will
be calculating these percentages in more places.

Signed-off-by: default avatarJim Harris <james.r.harris@intel.com>
Change-Id: If7d84c00fe1b666988fe06537836ba7b9cb161aa

Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/9580


Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Community-CI: Mellanox Build Bot
Tested-by: default avatarSPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: default avatarChangpeng Liu <changpeng.liu@intel.com>
Reviewed-by: default avatarTomasz Zawadzki <tomasz.zawadzki@intel.com>
Reviewed-by: default avatarBen Walker <benjamin.walker@intel.com>
parent 1cfdbd42

module/scheduler/dynamic/scheduler_dynamic.c

+12 −6
Original line number Diff line number Diff line
@@ -54,6 +54,16 @@ static struct core_stats *g_cores; 
#define SCHEDULER_LOAD_LIMIT 20

#define SCHEDULER_CORE_LIMIT 95



static uint8_t

_busy_pct(uint64_t busy, uint64_t idle)

{

	if ((busy + idle) == 0) {

		return 0;

	}



	return busy * 100 / (busy + idle);

}



static uint8_t

_get_thread_load(struct spdk_scheduler_thread_info *thread_info)

{
@@ -62,12 +72,8 @@ _get_thread_load(struct spdk_scheduler_thread_info *thread_info) 
	busy = thread_info->current_stats.busy_tsc;

	idle = thread_info->current_stats.idle_tsc;



	if (busy == 0) {

		/* No work was done, exit before possible division by 0. */

		return 0;

	}

	/* return percentage of time thread was busy */

	return busy  * 100 / (busy + idle);

	return _busy_pct(busy, idle);

}



typedef void (*_foreach_fn)(struct spdk_scheduler_thread_info *thread_info);
@@ -133,7 +139,7 @@ _is_core_over_limit(uint32_t core_id) 
	}



	/* Work done was less than the limit */

	if (busy * 100 / (busy + idle) < SCHEDULER_CORE_LIMIT) {

	if (_busy_pct(busy, idle) < SCHEDULER_CORE_LIMIT) {

		return false;

	}