iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

time/sched_clock: Use Hz as the unit for clock rate reporting below 4kHz

Browse Source 
The kernel uses kHz as the unit for clock rates reported between 1MHz
(inclusive) and 4MHz (exclusive), e.g.:

 sched_clock: 64 bits at 1000kHz, resolution 1000ns, wraps every 2199023255500ns

This reduces the amount of data lost due to rounding, but hasn't been
replicated for the kHz range when support was added for proper reporting of
sub-kHz clock rates.  Take the same approach for rates between 1kHz
(inclusive) and 4kHz (exclusive), which makes it consistent.

Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/alpine.DEB.2.21.2204240106380.9383@angie.orcam.me.uk
This commit is contained in:
Maciej W. Rozycki 2022-04-24 12:47:26 +01:00 committed by Thomas Gleixner
parent 92067440f1
commit cc1b923a4e
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
kernel/time/sched_clock.c
View File

@ -203,7 +203,7 @@ sched_clock_register(u64 (*read)(void), int bits, unsigned long rate)
r = DIV_ROUND_CLOSEST(r, 1000000);
r_unit = 'M';
} else {
if (r >= 1000) {
if (r >= 4000) {
r = DIV_ROUND_CLOSEST(r, 1000);
r_unit = 'k';
} else {