From: Bill H. <ha...@au...> - 2002-10-07 18:55:37
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fyi - for those doing performance measurements on 2.5.40, the kernel has debugging turned on under kernel hacking - VolanoMark went from 58 % system to 93 % system with debugging on ... Bill |
From: Dave H. <hav...@us...> - 2002-10-07 20:11:06
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Bill Hartner wrote: > fyi - for those doing performance measurements on 2.5.40, the kernel > has debugging turned on under kernel hacking - VolanoMark went from > 58 % system to 93 % system with debugging on ... Um, which debugging are you talking about? There are a few separate options. Did you turn them all on? [*] Software Suspend (EXPERIMENTAL) [*] Kernel debugging [*] Debug memory allocations [*] Memory mapped I/O debugging [*] Magic SysRq key [*] Spinlock debugging [*] Load all symbols for debugging/kksymoops -- Dave Hansen hav...@us... |
From: Bill H. <ha...@au...> - 2002-10-07 22:30:30
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Um, the config file _downloaded_ from kernel.org has them turned on plus a bunch of other things like preemptable kernel...file systems... linux/arch/i386/defconfig These "new" default options were on in 2.5.39 also. Dave Hansen wrote: > > Bill Hartner wrote: > > fyi - for those doing performance measurements on 2.5.40, the kernel > > has debugging turned on under kernel hacking - VolanoMark went from > > 58 % system to 93 % system with debugging on ... > > Um, which debugging are you talking about? There are a few separate > options. Did you turn them all on? > > [*] Software Suspend (EXPERIMENTAL) > [*] Kernel debugging > [*] > Debug memory allocations > [*] Memory mapped I/O debugging > [*] Magic > SysRq key > [*] Spinlock debugging > [*] Load all > symbols for debugging/kksymoops > > -- > Dave Hansen > hav...@us... -- IBM Linux Technology Center Performance Team http://www-124.ibm.com/developerworks/oss/linux bha...@au... |