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| author | Jeff Layton <jlayton@kernel.org> | 2024-10-03 00:27:17 +0300 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2024-10-10 11:20:46 +0300 |
| commit | 2a15385742c689a271345dcbb4c28b9c568bc7ce (patch) | |
| tree | ae5946a9f20a5508c8c77a74b574f399d87e1b19 /include/linux | |
| parent | ee3283c608dfa21251b0821d7bb198c7ae3189f6 (diff) | |
| download | linux-2a15385742c689a271345dcbb4c28b9c568bc7ce.tar.xz | |
timekeeping: Add percpu counter for tracking floor swap events
The mgtime_floor value is a global variable for tracking the latest
fine-grained timestamp handed out. Because it's a global, track the
number of times that a new floor value is assigned.
Add a new percpu counter to the timekeeping code to track the number of
floor swap events that have occurred. A later patch will add a debugfs
file to display this counter alongside other stats involving multigrain
timestamps.
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Randy Dunlap <rdunlap@infradead.org> # documentation bits
Link: https://lore.kernel.org/all/20241002-mgtime-v10-2-d1c4717f5284@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/timekeeping.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h index 7aa85246c183..84a035e86ac8 100644 --- a/include/linux/timekeeping.h +++ b/include/linux/timekeeping.h @@ -48,6 +48,7 @@ extern void ktime_get_coarse_real_ts64(struct timespec64 *ts); /* Multigrain timestamp interfaces */ extern void ktime_get_coarse_real_ts64_mg(struct timespec64 *ts); extern void ktime_get_real_ts64_mg(struct timespec64 *ts); +extern unsigned long timekeeping_get_mg_floor_swaps(void); void getboottime64(struct timespec64 *ts); |