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From: Thomas Monjalon <thomas.monjalon@6wind.com>
To: "Richardson, Bruce" <bruce.richardson@intel.com>
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] next releases
Date: Thu, 28 Aug 2014 11:06:07 +0200	[thread overview]
Message-ID: <2353283.PtiVvKdYNr@xps13> (raw)
In-Reply-To: <59AF69C657FD0841A61C55336867B5B0343ECAF0@IRSMSX103.ger.corp.intel.com>

2014-08-28 08:41, Richardson, Bruce:
> As for rte_rdtsc_precise, I'm not sure about its origins, but I'm
> surprised to see that it does not correspond to the rdtscp instruction.
> Can anyone else comment on this one? I would assume it's designed
> to be used to get more accurate measurements of smaller blocks of
> code that we want to benchmark, since rdtsc works best when timing
> larger blocks (in terms of cycle counts, that is, not source lines :-) ).

The good thing with git history (and well written commit logs) is that
we can easily get such answer:
	http://dpdk.org/browse/dpdk/commit/?id=3314648f83c3dc06d7d9a

Bruce, do you know how rdtscp is supported across Intel processors?

-- 
Thomas

  reply	other threads:[~2014-08-28  9:02 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-08-25 17:15 Thomas Monjalon
2014-08-27 17:04 ` Cyril Chemparathy
2014-08-28  8:41   ` Richardson, Bruce
2014-08-28  9:06     ` Thomas Monjalon [this message]
2014-08-28  9:22       ` Richardson, Bruce

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