On 10/2/20, 6:05 PM, "Andrew Morton" <akpm@xxxxxxxxxxxxxxxxxxxx> wrote:
On Fri, 2 Oct 2020 01:06:21 -0700 John Hubbard <jhubbard@xxxxxxxxxx> wrote:
> This patch reduces the running time for compaction_test from about 27
> sec, to 3.3 sec, which is about an 8x speedup.
>
> These numbers are for an Intel x86_64 system with 32 GB of DRAM.
>
> The compaction_test.c program was spending most of its time doing
> mmap(), 1 MB at a time, on about 25 GB of memory.
>
> Instead, do the mmaps 100 MB at a time. (Going past 100 MB doesn't make
> things go much faster, because other parts of the program are using the
> remaining time.)
Seems nice. It's been 5 years, but hopefully Sri is still at Akamai?
Looks good to me.
Thanks
-Sri
