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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: Tejun Heo <tj@kernel.org>
Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Baolin Wang 2020-12-10 18:56:44 +08:00 committed by Jens Axboe
parent 1aba169e77
commit 76efc1c770
2 changed files with 18 additions and 1 deletions
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3
block/blk-iocost.c
View File

@ -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);
}

16
include/trace/events/iocost.h
View File

@ -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,