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Re: Performance of function calls of SH?(Fw: [RFC][selinux] Tuning SELinux permission check
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From: Yuichi N. <yn...@hi...> - 2007-09-10 06:58:44
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On Mon, 10 Sep 2007 14:56:25 +0900 Paul Mundt wrote: > On Mon, Sep 10, 2007 at 02:37:04PM +0900, Yuichi Nakamura wrote: > > On Mon, 10 Sep 2007 13:58:47 +0900 > > Paul Mundt wrote: > > > It's probably worth trying to do the manual inling for those old > > > compilers (especially as there don't seem to be any regressions for any > > > of the other platforms -- though you didn't list before and after code > > > size), though I would be surprised if it's still problematic in current > > > compilers. If you don't notice an improvement in more recent compilers, > > > you may want to roll together a simple testcase and shove it in to the > > > GCC bugzilla. > > I would like to try newer gcc. > > > > http://userweb.kernel.org/~lethal/gnush4_linux_v0702_rc-1-1.i386.tar.gz Thanks, It is useful! I used gcc in above and compiled kernel. I found that performance does not get better when compiled by 4.2.1. Even 3.4.5 is better??? lmbench result for SH(SH4, SH7751R), kernel 2.6.22 SELinux(gcc3.4.5) SELinux(gcc4.2.1) Simple read 5.37 6.03 Simple write 5.06 5.92 # Result of 3.4.5 is a little different, I changed kernel config -- Yuichi Nakamura Hitachi Software Engineering Co., Ltd. Japan SELinux Users Group(JSELUG): http://www.selinux.gr.jp/ SELinux Policy Editor: http://seedit.sourceforge.net/ |
