Messages in this thread | | | Date | Sun, 11 Apr 1999 17:24:35 +0200 (CEST) | From | Andrea Arcangeli <> | Subject | Re: [PFC]: hash instrumentation |
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On Sun, 11 Apr 1999, Andrea Arcangeli wrote:
>>but this also means that you should be *very* careful where you put your >>"touch_buffer(bh)" because you don't want that in a performance path like >>find_buffer(). leaving touch_buffer() in bread() and brw_page() might be > >Hmm, yes probably this is a good idea, I'll think about that tomorrow.
I think to have fixed the lru-list-mkyoung performance problem in find_buffer/find_page (and looking at the ext2 code the only place where we must touch a buffer is getblk and not get_hashtable or find_buffer!). I am releasing a new 2.2.5_arca10.bz2 that should perform better under no-VM-kernel intensive operation (like a kernel compile), but will be _equally_ good (or better!) in preserving the working set under heavy swap. With the latest changes I did today _here_ again responsiveness under swap is _impressive_ and I suggest _everybody_ to try it out.
ftp://e-mind.com/pub/linux/arca-tree/2.2.5_arca10.bz2
Thanks to Chuck for the good hints.
Andrea Arcangeli
PS. with the help of some no-i386 guy this last arca-patch should compile also on sparc and alpha (and maybe other archs).
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