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.
Signed-off-by: Baolin Wang <[email protected]> --- block/blk-iocost.c | 3 +++ include/trace/events/iocost.h | 16 +++++++++++++++- 2 files changed, 18 insertions(+), 1 deletion(-) diff --git a/block/blk-iocost.c b/block/blk-iocost.c index ffa418c..ac6078a 100644 --- a/block/blk-iocost.c +++ b/block/blk-iocost.c @@ -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); } diff --git a/include/trace/events/iocost.h b/include/trace/events/iocost.h index 0b68699..e282ce0 100644 --- a/include/trace/events/iocost.h +++ b/include/trace/events/iocost.h @@ -11,7 +11,7 @@ #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 @@ ) ); +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, -- 1.8.3.1
