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| author | Jeremy Fitzhardinge <jeremy@xensource.com> | 2007-07-17 18:37:04 -0700 |
|---|---|---|
| committer | Jeremy Fitzhardinge <jeremy@goop.org> | 2007-07-18 08:47:42 -0700 |
| commit | 688340ea34c61ad12473ccd837325b59aada9a93 (patch) | |
| tree | 2862f4dca8d47fc4e6ecfaba2243d813344e3cd2 /arch/i386/kernel/vmi.c | |
| parent | d572929cdd12a60732c3522f7cf011bfa29165cf (diff) | |
| download | linux-688340ea34c61ad12473ccd837325b59aada9a93.tar.bz2 | |
Add a sched_clock paravirt_op
The tsc-based get_scheduled_cycles interface is not a good match for
Xen's runstate accounting, which reports everything in nanoseconds.
This patch replaces this interface with a sched_clock interface, which
matches both Xen and VMI's requirements.
In order to do this, we:
1. replace get_scheduled_cycles with sched_clock
2. hoist cycles_2_ns into a common header
3. update vmi accordingly
One thing to note: because sched_clock is implemented as a weak
function in kernel/sched.c, we must define a real function in order to
override this weak binding. This means the usual paravirt_ops
technique of using an inline function won't work in this case.
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Zachary Amsden <zach@vmware.com>
Cc: Dan Hecht <dhecht@vmware.com>
Cc: john stultz <johnstul@us.ibm.com>
Diffstat (limited to 'arch/i386/kernel/vmi.c')
| -rw-r--r-- | arch/i386/kernel/vmi.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/i386/kernel/vmi.c b/arch/i386/kernel/vmi.c index 234bd6ff518d..72042bb7ec94 100644 --- a/arch/i386/kernel/vmi.c +++ b/arch/i386/kernel/vmi.c @@ -891,7 +891,7 @@ static inline int __init activate_vmi(void) paravirt_ops.setup_boot_clock = vmi_time_bsp_init; paravirt_ops.setup_secondary_clock = vmi_time_ap_init; #endif - paravirt_ops.get_scheduled_cycles = vmi_get_sched_cycles; + paravirt_ops.sched_clock = vmi_sched_clock; paravirt_ops.get_cpu_khz = vmi_cpu_khz; /* We have true wallclock functions; disable CMOS clock sync */ |