maria-developers team mailing list archive

[Sergei Golubchik <serg@xxxxxxxxxxx>]

Hi, Sergey!

On Feb 27, Sergey Vojtovich wrote:
> Hi Sergei,
> 
> do you know if we ship any binaries with fast mutex (-DMY_PTHREAD_FASTMUTEX)
> enabled or officially suggest it? What was it's intention and what loads it was
> supposed to make faster?

As far as I understand, we built with fastmutex on Linux.
See cmake/build_configurations/mysql_release.cmake

> I'm trying to understand if fastmutex is worth fixing. It looks like
> duplication of PTHREAD_MUTEX_ADAPTIVE_NP, so we have double spinning
> when they're enabled.  According to my recent benchmarks it shown
> worst performance.

Disable it then :)

Regards,
Sergei