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From: wilson self <wself00@gmail.com>
To: linux-kernel@vger.kernel.org
Subject: VDSO gettimeofday() x86_64 linux 3.2
Date: Tue, 16 Oct 2012 13:09:55 -0500	[thread overview]
Message-ID: <CAAZUjxCvK0QnwnZP_FBiO2JM1rMoEA3HLjKAcYD14cxdGWyg4Q@mail.gmail.com> (raw)

I noticed recently that my get time of day calls are quite a bit
slower than I would have expected; and it would see that a likely
cause is that they are not going via vdso, but rather a system call.

In older kernels there was kernel.vsyscall64 parameter to enable them,
but this seems to be gone in later kernel releases.  What config
option or parameter might I be missing that could cause gettimeofday()
to use the fallback methods?

Thanks
wilson

             reply	other threads:[~2012-10-16 18:09 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-10-16 18:09 wilson self [this message]
2012-10-16 19:24 ` Andy Lutomirski
2012-10-16 19:33   ` wilson self
2012-10-16 19:39     ` Andy Lutomirski
2012-10-16 19:43       ` wilson self
2012-10-16 21:36         ` Andy Lutomirski

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