On 4/19/2016 7:33 AM, Jerome Marchand wrote:
On 04/19/2016 12:55 AM, Shi, Yang wrote:
2. I ran my THP test (generated a program with 4MB text section) on both
x86-64 and ARM64 with yours and Hugh's patches (linux-next tree), I got
the program execution time reduced by ~12% on x86-64, it looks very
impressive.
But, on ARM64, there is just ~3% change, and sometimes huge tmpfs may
show even worse data than non-hugepage.
Both yours and Hugh's patches has the same behavior.
Any idea?
Just a shot in the dark, but what page size do you use? If you use 4k
pages, then hugepage size should be the same as on x86 and a similar
I do use 4K pages for both x86-64 and ARM64 in my testing.
Thanks,
Yang
behavior could be expected. Otherwise, hugepages would be too big to be
taken advantage of by your test program.
Jerome
