Messages in this thread | | | Date | Wed, 10 Mar 2004 09:50:00 +0900 | From | Norihiko Mukouyama <> | Subject | RE: Kernel 2.6.3 patch for Intel Compiler 8.0 |
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Hi All!!
>I used the patch to compile two identical kernels with gcc 3.3.3 and >icc 8.0 with oprofile support built in. >The optimization switches were chosen quite conservative, i.e. >"-O2 -Ob1", no IPO, and of course: no MMX, SSE, and SSE2 stuff inside >the kernel (thus disabling Intel's great vectorizer). >Profiling: lmbench ran ten times but time measurements were taken from >oprofile (on Pentium 4, GLOBAL_POWER_EVENTS in kernel space only, >counter overflow: 3.000). >Results: 33% of the lmbench procs faster on icc, 66% faster on gcc.
Really???
If it is ture using icc 66% faster than gcc., It is wonderful. Could you show us detail data to lmbench results.
Thanks!!
Norihiko
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