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Re: [PATCH] Use HP_TIMING for benchmarks if available
- From: David Miller <davem at davemloft dot net>
- To: siddhesh at redhat dot com
- Cc: libc-alpha at sourceware dot org
- Date: Mon, 15 Apr 2013 13:12:16 -0400 (EDT)
- Subject: Re: [PATCH] Use HP_TIMING for benchmarks if available
- References: <20130415081936 dot GN9444 at spoyarek dot pnq dot redhat dot com>
From: Siddhesh Poyarekar <siddhesh@redhat.com>
Date: Mon, 15 Apr 2013 13:49:36 +0530
> Jitter due to high system load is unavoidable even with
> clock_gettime since (as Rich Felker pointed out in an earlier
> discussion) competition for cache will still affect the performance
> numbers.
And also competition for the core pipeline itself with the other
sibling(s) on the core.