bsdtar eats CPU when extracting POSIX tar archive
kientzle at freebsd.org
Wed Aug 25 23:55:29 PDT 2004
Jun Kuriyama wrote:
> Tim Kientzle wrote:
>>I'm suspicious that all of the time being used is
> Thank you for your investigation. This problem is happened on my dual
> P-III box, but I cannot reproduce it on another P4 box. I'll try what
> is different on them.
> Looks kqueue related?
Looks like it could be network related. I see almost
5,000 calls to recvfrom. With that much network I/O,
any network issues on that box would definitely cause problems.
Do you know what's causing that? Is it uid/gid lookups,
perhaps? bsdtar does not (yet) do any caching of uid/gid
lookups; once I implement that, it will definitely have a
big performance impact for folks using NIS or LDAP. But
that still seems like a lot. I wonder if there's something
else going on?
More information about the freebsd-current