Commit 76efc1c7 authored by Baolin Wang's avatar Baolin Wang Committed by Jens Axboe
Browse files

blk-iocost: Add iocg idle state tracepoint 



It will be helpful to trace the iocg's whole state, including active and
idle state. And we can easily expand the original iocost_iocg_activate
trace event to support a state trace class, including active and idle
state tracing.

Acked-by: default avatarTejun Heo <tj@kernel.org>
Signed-off-by: default avatarBaolin Wang <baolin.wang@linux.alibaba.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 1aba169e

block/blk-iocost.c

+3 −0
Original line number Diff line number Diff line
@@ -2185,6 +2185,9 @@ static int ioc_check_iocgs(struct ioc *ioc, struct ioc_now *now) 
							    WEIGHT_ONE);

			}



			TRACE_IOCG_PATH(iocg_idle, iocg, now,

					atomic64_read(&iocg->active_period),

					atomic64_read(&ioc->cur_period), vtime);

			__propagate_weights(iocg, 0, 0, false, now);

			list_del_init(&iocg->active_list);

		}

include/trace/events/iocost.h

+15 −1
Original line number Diff line number Diff line
@@ -11,7 +11,7 @@ struct ioc_gq; 


#include <linux/tracepoint.h>



TRACE_EVENT(iocost_iocg_activate,

DECLARE_EVENT_CLASS(iocost_iocg_state,



	TP_PROTO(struct ioc_gq *iocg, const char *path, struct ioc_now *now,

		u64 last_period, u64 cur_period, u64 vtime),
@@ -59,6 +59,20 @@ TRACE_EVENT(iocost_iocg_activate, 
	)

);



DEFINE_EVENT(iocost_iocg_state, iocost_iocg_activate,

	TP_PROTO(struct ioc_gq *iocg, const char *path, struct ioc_now *now,

		 u64 last_period, u64 cur_period, u64 vtime),



	TP_ARGS(iocg, path, now, last_period, cur_period, vtime)

);



DEFINE_EVENT(iocost_iocg_state, iocost_iocg_idle,

	TP_PROTO(struct ioc_gq *iocg, const char *path, struct ioc_now *now,

		 u64 last_period, u64 cur_period, u64 vtime),



	TP_ARGS(iocg, path, now, last_period, cur_period, vtime)

);



DECLARE_EVENT_CLASS(iocg_inuse_update,



	TP_PROTO(struct ioc_gq *iocg, const char *path, struct ioc_now *now,

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