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perf/x86/uncore: make hrtimer timeout configurable per box

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This patch makes the hrtimer timeout configurable per PMU
box. Not all counters have necessarily the same width and
rate, thus the default timeout of 60s may need to be adjusted.

This patch adds box->hrtimer_duration. It is set to default
when the box is allocated. It can be overriden when the box
is initialized.

Cc: mingo@elte.hu
Cc: acme@redhat.com
Cc: ak@linux.intel.com
Cc: zheng.z.yan@intel.com
Cc: peterz@infradead.org
Signed-off-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1392132015-14521-5-git-send-email-eranian@google.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Stephane Eranian 2014-02-11 16:20:10 +01:00 committed by Thomas Gleixner
parent ae58faf900
commit 79859cce5a
2 changed files with 6 additions and 2 deletions
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7
arch/x86/kernel/cpu/perf_event_intel_uncore.c
View File

@ -2798,14 +2798,14 @@ static enum hrtimer_restart uncore_pmu_hrtimer(struct hrtimer *hrtimer)
local_irq_restore(flags);
hrtimer_forward_now(hrtimer, ns_to_ktime(UNCORE_PMU_HRTIMER_INTERVAL));
hrtimer_forward_now(hrtimer, ns_to_ktime(box->hrtimer_duration));
return HRTIMER_RESTART;
}
static void uncore_pmu_start_hrtimer(struct intel_uncore_box *box)
{
__hrtimer_start_range_ns(&box->hrtimer,
ns_to_ktime(UNCORE_PMU_HRTIMER_INTERVAL), 0,
ns_to_ktime(box->hrtimer_duration), 0,
HRTIMER_MODE_REL_PINNED, 0);
}
@ -2839,6 +2839,9 @@ static struct intel_uncore_box *uncore_alloc_box(struct intel_uncore_type *type,
box->cpu = -1;
box->phys_id = -1;
/* set default hrtimer timeout */
box->hrtimer_duration = UNCORE_PMU_HRTIMER_INTERVAL;
return box;
}

1
arch/x86/kernel/cpu/perf_event_intel_uncore.h
View File

@ -489,6 +489,7 @@ struct intel_uncore_box {
u64 tags[UNCORE_PMC_IDX_MAX];
struct pci_dev *pci_dev;
struct intel_uncore_pmu *pmu;
u64 hrtimer_duration; /* hrtimer timeout for this box */
struct hrtimer hrtimer;
struct list_head list;
struct intel_uncore_extra_reg shared_regs[0];