> On Jul 26, 2015, at 11:50 AM, Andi Kleen <a...@firstfloor.org> wrote:
>
> Mikhail Maltsev <malts...@gmail.com> writes:
>
>> Hi, all!
>> Recently I did some profiling of GCC to find hotspots and areas of possible
>> performance improvement among them. glibc malloc(3) is one of (perhaps
>> known)
>
> I've been compiling gcc with tcmalloc to do a similar speedup. It would be
> interesting to compare that to your patch.
>
> Another useful optimization is to adjust the allocation size to be >=
> 2MB. Then modern Linux kernels often can give you a large page,
> which cuts down TLB overhead. I did similar changes some time
> ago for the garbage collector.
Unless you are running with 64k pages which I do all the time on my armv8
system.
Thanks,
Andrew
>
> BTW I saw big differences in larger LTO builds.
>
> -Andi
>
> --
> a...@linux.intel.com -- Speaking for myself only
