On 09/04/2013 01:23 PM, Andy Lutomirski wrote: > On Wed, Sep 4, 2013 at 12:17 PM, John Stultz <[email protected]> wrote: >> On Wed, Sep 4, 2013 at 2:18 AM, Arun Sharma <[email protected]> wrote: >>> A couple of years ago Andy posted this patch series: >>> >>> http://thread.gmane.org/gmane.linux.kernel/1233209/ >>> >>> These patches have been in use at facebook for a couple of years and along >>> with a vDSO implementation of thread_cpu_time(), they have proven useful for >>> our profilers. >>> >>> I didn't see any arguments against this patch series. Did I miss some >>> discussion on the topic? >> (I've got a new email address, just fyi) >> >> So, looking at the thread, I think Richard brought up the issue that >> the net performance gain with the new interface wasn't significant >> after the optimizations were applied to both interfaces. >> >> If we're going to add a new interface that uses something other then a >> timespec, we likely need to put some serious thought into that new >> type, and see how it could be used across a number of syscalls. Some >> of the discussion around dealing with the 2038 issue touched on this. >> >> But getting those optimizations to the existing interface merged would >> be nice, though. Anyone want to resend the patch? > It's already in. See 5f293474c4c6c4dc2baaf2dfd486748b5986de76, etc. Great! -john
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