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Re: Vnode API change: add global vnode cache
Taylor R Campbell <campbell+netbsd-tech-kern%mumble.net@localhost> wrote:
> Date: Mon, 7 Apr 2014 16:44:47 +0100
> From: Mindaugas Rasiukevicius <rmind%netbsd.org@localhost>
> One concern though: can you benchmark ./build.sh on a machine with 8 or
> more CPUs? I fear that vcache.lock might be a bit contended and we
> ought to figure out how much. If the contention is not significant, it
> should be fine for now.
> I can do this if you really want, but I doubt it'll make a difference
> unless your src and obj trees are spread across multiple different
> types of file systems, because currently for ufs, ufs_ihashlock and
> ufs_hashlock are just as contended as vcache.lock would be.
Should be fine, but once tmpfs is switched to use vcache, it might become
a little bit more visible for some workloads..
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