Messages in this thread | | | Subject | Re: slowdown 2.0.35 vs 2.1.121 (pre 1) | From | Claude Gamache <> | Date | 11 Sep 1998 09:36:53 -0400 |
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Andrea Arcangeli <andrea@e-mind.com> writes:
> >So the problem really seems to be link somehow with Pentium PRO and > >Pentium II processors ! > > Sound really strange. Can you run the same binary image of the Pentium > (that works fine) on the PII/PPROs (just to remove all software variables > from the equation?)? > > Andrea[s] Arcangeli
I took the binary compiled on Pentium 100 MHz with gcc 2.7.2 + glibc 1 and I tried it on our IBM dual PPro 200 MHz (256 kb cache): the problem is still there. The performance loss does not seem to be linked with gcc/egcs or glibc version. We have reproduced (unfortunately) the problem with 2 different dual PII systems, single and dual PPro systems that had a variety of gcc/egcs/glibc versions.
I also disabled the L2 cache to see if that would make any differences: the system is slower and there is still a performance loss. So it does not seem linked with L2 cache either.
We will keep investigating, (we should try Andrea profiling test this afternoon)
Claude
-- Claude Gamache, CAE Electronique Ltee, 8585 Cote-de-Liesse Saint-Laurent, Quebec, Canada H4T 1G6 Email: cgamache@cae.ca Tel.: (514) 341-2000 x3194
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