Profile-guided optimisation binaries for mariadb in slackware

rpedrica · 01-21-2014, 04:42 AM

I came across a very interesting article by Kristian Nielsen on mariadb single-threaded performance:

http://kristiannielsen.livejournal.c...ampaign=buffer

The upshot is that you can get big performance improvements with this type of compilation, reducing L2 cache misses. Anyone else following this?

Mark Pettit · 01-22-2014, 12:41 AM

One wonders how many other programs we use could benefit from this type of optimisation. It seems however to be a slightly more complicated way to compile code. Perhaps things like the perl/python interpreters would most benefit ?

rob.rice · 01-22-2014, 05:10 PM

I'd like to see what would happen IF the whole distro were rebuilt with the gcc option "-march=native"
nothing would run on any other machine
I just wonder what it would be like to have the WHOLE CPU BEING USED
right now I would be willing to bet that half the transistors in the CPU are doing nothing

rpedrica · 01-23-2014, 01:05 AM

A lot of work though ... considering there are basically 2 compile runs. It may be useful for specific apps that would have greater benefit from it ( eg. mariadb above ).

rpedrica · 01-23-2014, 11:00 AM

More dtails on PGO

http://kristiannielsen.livejournal.c...ampaign=buffer