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Anyone know of a Linux kernel optimized for Intel Pentium M? - Page 3

post #21 of 23
one of the best patches for speed is the BFQ (NOT BFS), it really is for platter drives and not an SSD.
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post #22 of 23
Quote:
Originally Posted by mbohun View Post
bash-3.1$ gcc --version => gcc (GCC) 4.5.3
bash-3.1$ echo $CFLAGS => -march=pentium-m -O2 -fomit-frame-pointer

---
DMI: TOSHIBA TECRA S3/Portable PC, BIOS Version 3.20 11/13/2007

this laptop has 2gb RAM, and to compile this kernel with the Pentium 2.00GHz CPU running on 1.33GHz - 800MHz takes apx. 35-40 min (of course that depends on what kernel are you running while compiling, and what scheduler, etc, and what other stuff is running...)
You should use march=native, it'll detect your CPU automatically and compile for it (as they change the optimum setting between GCC releases sometimes, native is a catch-all). Also, if you've got SSE instructions on your CPU (I'm not sure about that Pentium M), mfpmath=sse will compile preferring all floating-point calculations to use the SSE instructions (otherwise, it might not use them). That said, that's more about performance tuning, rather than getting a slimmed-down kernel to use with minimum fuss

Quote:
Originally Posted by mushroomboy View Post
one of the best patches for speed is the BFQ (NOT BFS), it really is for platter drives and not an SSD.
BFS is a good one too for desktops though, it's only politics keeping it from being the default imo
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post #23 of 23
Quote:
Originally Posted by chemicalfan View Post
BFS is a good one too for desktops though, it's only politics keeping it from being the default imo
Yes and no, the CFS scheduler for the CPU has come a LONG way since BFS was started. Right now most tests show them around equal, BFS winning in a few cases. Soon CFS will get to the same point, mainly because now they are starting to design the kernel for desktops and not just server work.
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