From: Robert Richter <robert.richter@amd.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>,
LKML <linux-kernel@vger.kernel.org>,
oprofile-list <oprofile-list@lists.sourceforge.net>,
Robert Richter <robert.richter@amd.com>,
Thomas Gleixner <tglx@linutronix.de>
Subject: [PATCH 4/9] tsc, x86: use new perfctr reservation functions in tsc code
Date: Thu, 4 Mar 2010 16:22:06 +0100 [thread overview]
Message-ID: <1267716131-17908-5-git-send-email-robert.richter@amd.com> (raw)
In-Reply-To: <1267716131-17908-1-git-send-email-robert.richter@amd.com>
Use reserve_perfctr()/release_perfctr() in tsc code.
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Robert Richter <robert.richter@amd.com>
---
arch/x86/kernel/tsc.c | 6 ++----
1 files changed, 2 insertions(+), 4 deletions(-)
diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c
index ff98ef2..2cdacae 100644
--- a/arch/x86/kernel/tsc.c
+++ b/arch/x86/kernel/tsc.c
@@ -871,7 +871,7 @@ static unsigned long __init calibrate_cpu(void)
unsigned long flags;
for (i = 0; i < 4; i++)
- if (avail_to_resrv_perfctr_nmi_bit(i))
+ if (reserve_perfctr(i))
break;
no_ctr_free = (i == 4);
if (no_ctr_free) {
@@ -881,8 +881,6 @@ static unsigned long __init calibrate_cpu(void)
rdmsrl(MSR_K7_EVNTSEL3, evntsel3);
wrmsrl(MSR_K7_EVNTSEL3, 0);
rdmsrl(MSR_K7_PERFCTR3, pmc3);
- } else {
- reserve_perfctr_nmi(MSR_K7_PERFCTR0 + i);
}
local_irq_save(flags);
/* start measuring cycles, incrementing from 0 */
@@ -900,7 +898,7 @@ static unsigned long __init calibrate_cpu(void)
wrmsrl(MSR_K7_PERFCTR3, pmc3);
wrmsrl(MSR_K7_EVNTSEL3, evntsel3);
} else {
- release_perfctr_nmi(MSR_K7_PERFCTR0 + i);
+ release_perfctr(i);
}
return pmc_now * tsc_khz / (tsc_now - tsc_start);
--
1.7.0
next prev parent reply other threads:[~2010-03-04 16:49 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-04 15:22 [PATCH 0/9] oprofile, perf, x86: introduce new functions to reserve perfctrs Robert Richter
2010-03-04 15:22 ` [PATCH 1/9] perf, x86: reduce number of CONFIG_X86_LOCAL_APIC macros Robert Richter
2010-03-04 15:22 ` [PATCH 2/9] oprofile, perf, x86: do not allocate evntsel counter msr Robert Richter
2010-03-04 15:22 ` [PATCH 3/9] oprofile, perf, x86: introduce new functions to reserve perfctrs by index Robert Richter
2010-03-20 5:45 ` Andi Kleen
2010-03-25 15:52 ` Robert Richter
2010-03-25 19:33 ` Andi Kleen
2010-03-04 15:22 ` Robert Richter [this message]
2010-03-04 15:22 ` [PATCH 5/9] perf, x86: use new perfctr reservation functions in perf code Robert Richter
2010-03-04 15:22 ` [PATCH 6/9] oprofile/x86: rework error handler in nmi_setup() Robert Richter
2010-03-04 15:22 ` [PATCH 7/9] oprofile/x86: return -EBUSY if counters are already reserved Robert Richter
2010-03-04 15:22 ` [PATCH 8/9] oprofile/x86: group IBS code Robert Richter
2010-03-04 15:22 ` [PATCH 9/9] oprofile/x86: implement perfctr reservation for IBS Robert Richter
2010-03-04 17:59 ` [PATCH 0/9] oprofile, perf, x86: introduce new functions to reserve perfctrs Peter Zijlstra
2010-03-11 11:48 ` Peter Zijlstra
2010-03-11 12:47 ` Ingo Molnar
2010-03-11 15:45 ` Robert Richter
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