34 lines
924 B
Diff
34 lines
924 B
Diff
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From fdd728c0872b34d1b6f96ee5601b619748afc9e8 Mon Sep 17 00:00:00 2001
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From: Boris Ranto <branto@redhat.com>
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Date: Mon, 18 May 2015 20:27:56 +0200
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Subject: [PATCH] Skip initialization if rtdsc is not implemented
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Patch by James Page. See
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https://bugs.launchpad.net/ubuntu/+source/ceph/+bug/1432786
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for more details.
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---
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src/common/Cycles.cc | 5 +++++
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1 file changed, 5 insertions(+)
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diff --git a/src/common/Cycles.cc b/src/common/Cycles.cc
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index a2efcf3..a5367f7 100644
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--- a/src/common/Cycles.cc
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+++ b/src/common/Cycles.cc
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@@ -52,6 +52,11 @@ void Cycles::init()
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if (cycles_per_sec != 0)
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return;
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+
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+ // Skip initialization if rtdsc is not implemented
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+ if (rdtsc() == 0)
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+ return;
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+
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// Compute the frequency of the fine-grained CPU timer: to do this,
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// take parallel time readings using both rdtsc and gettimeofday.
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// After 10ms have elapsed, take the ratio between these readings.
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--
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2.1.0
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