diff options
| author | Richard Braun <rbraun@sceen.net> | 2017-05-16 01:57:46 +0200 |
|---|---|---|
| committer | Richard Braun <rbraun@sceen.net> | 2017-05-16 02:00:19 +0200 |
| commit | 3716fa334dc17b6e3bd03493429877fceb606a1c (patch) | |
| tree | 8fceda580e21f3390a3d2291385697090163d63e /arch/x86/machine/lapic.c | |
| parent | fca151d3e8b551483cc3f5d43394a1d90b79ee34 (diff) | |
x86/lapic: reduce timer calibration delay
Now that cpu_delay uses the timestamp counter, local APIC timer
calibration gets more precise, and doesn't require such a long
interval.
Diffstat (limited to 'arch/x86/machine/lapic.c')
| -rw-r--r-- | arch/x86/machine/lapic.c | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/arch/x86/machine/lapic.c b/arch/x86/machine/lapic.c index 89affc5..a978da1 100644 --- a/arch/x86/machine/lapic.c +++ b/arch/x86/machine/lapic.c @@ -55,13 +55,9 @@ #define LAPIC_TIMER_COUNT_MAX 0xffffffff /* - * The value of this duration (in microseconds) must be carefully set. - * It must divide a second (1000000) without loss of precision. It is - * recommended to use either 1s or 100ms. The former gives the best - * results, as it renders the time used for accounting operations - * negligible, but is slightly longer. + * Delay used to calibrate the local APIC timer, in microseconds. */ -#define LAPIC_TIMER_CAL_DELAY 1000000 +#define LAPIC_TIMER_CAL_DELAY 100000 /* * Spurious-interrupt vector register bits. |