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Fix an oversight; the APERF and MPERF counters are per-CPU, so also reset 

these by broadcasting to all CPUs with x86_msr_xcall(9).
This commit is contained in:
jruoho 2011-02-25 17:23:34 +00:00
parent 19a0877b02
commit 0f6b94e451
1 changed files with 17 additions and 4 deletions
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21
sys/arch/x86/acpi/acpi_cpu_md.c
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@ -1,4 +1,4 @@
/* $NetBSD: acpi_cpu_md.c,v 1.45 2011/02/25 17:07:30 jruoho Exp $ */
/* $NetBSD: acpi_cpu_md.c,v 1.46 2011/02/25 17:23:34 jruoho Exp $ */
/*-
* Copyright (c) 2010, 2011 Jukka Ruohonen <jruohonen@iki.fi>
@ -27,7 +27,7 @@
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: acpi_cpu_md.c,v 1.45 2011/02/25 17:07:30 jruoho Exp $");
__KERNEL_RCSID(0, "$NetBSD: acpi_cpu_md.c,v 1.46 2011/02/25 17:23:34 jruoho Exp $");
#include <sys/param.h>
#include <sys/bus.h>
@ -666,12 +666,25 @@ acpicpu_md_pstate_percent_status(void *arg1, void *arg2)
static void
acpicpu_md_pstate_percent_reset(struct acpicpu_softc *sc)
{
struct msr_rw_info msr;
uint64_t xc;
KASSERT((sc->sc_flags & ACPICPU_FLAG_P) != 0);
KASSERT((sc->sc_flags & ACPICPU_FLAG_P_HW) != 0);
wrmsr(MSR_APERF, 0);
wrmsr(MSR_MPERF, 0);
msr.msr_value = 0;
msr.msr_read = false;
msr.msr_type = MSR_APERF;
xc = xc_broadcast(0, (xcfunc_t)x86_msr_xcall, &msr, NULL);
xc_wait(xc);
msr.msr_value = 0;
msr.msr_read = false;
msr.msr_type = MSR_MPERF;
xc = xc_broadcast(0, (xcfunc_t)x86_msr_xcall, &msr, NULL);
xc_wait(xc);
sc->sc_pstate_aperf = 0;
sc->sc_pstate_mperf = 0;