I think Haitao is right given some stacks we've recently looked at. e.g. https://gist.github.com/KellenSunderland/893d11165e19d1efcf5c0fe8e8584600
-Kellen On Thu, Nov 23, 2017 at 7:32 PM, Haitao Wang <hai...@openailab.com> wrote: > Hi, Chris, > > As far as I know, the mutex implementation in Linux is based on futex > already. > > Thanks, > Haitao > > -----Original Message----- > From: dev-return-1553-haitao=openailab....@mxnet.incubator.apache.org > [mailto:dev-return-1553-haitao=openailab....@mxnet.incubator.apache.org] > On Behalf Of Chris Olivier > Sent: Friday, November 24, 2017 3:02 AM > To: dev@mxnet.incubator.apache.org > Subject: Futex > > Was doing some timing with futexes (we used them a lot in a previous life > in database engines) and they're consistently about 20-30% faster than > standard mutexes in Linux. > > However, it seems like this is not worth making a change since mutexes > don't tend to get called so much that it would seem to make a noticeable > difference, although I could be wrong -- so far besides the queue, I am not > aware of any major bottlenecks on mutexes. > > Any thoughts? > > -Chris > >
