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Re: Serious SPEC CPU 2006 FP performance regressions on IA32
- From: Grigory Zagorodnev <grigory_zagorodnev at linux dot intel dot com>
- To: "Menezes, Evandro" <evandro dot menezes at amd dot com>
- Cc: "H. J. Lu" <hjl at lucon dot org>, gcc at gcc dot gnu dot org, ubizjak at gmail dot com, Dwarak Rajagopal <dwarak dot rajagopal at txexmtae dot amd dot com>, "Meissner, Michael" <michael dot meissner at amd dot com>, dberlin at dberlin dot org
- Date: Thu, 11 Jan 2007 18:27:49 +0300
- Subject: Re: Serious SPEC CPU 2006 FP performance regressions on IA32
- References: <1449F58C868D8D4E9C72945771150BDFDF537C@SAUSEXMB1.amd.com>
Menezes, Evandro wrote:
Though not as pronounced, definitely significant.
Using binary search I've detected that 30% performance regression of
cpu2006/437.leslie3d benchmark is caused by revision 117891.
http://gcc.gnu.org/viewcvs?view=rev&revision=117891
I assume same commit causes regression of all other benchmarks from
cpu2k6 suite (running others to confirm).
- Grigory