This is the mail archive of the gcc-patches@gcc.gnu.org mailing list for the GCC project.

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: RFC: LRA for x86/x86-64 [0/9]

Richard Guenther <richard.guenther@gmail.com> writes:
>
> I think both measurements run into swap (low CPU utilization), from the LRA
> numbers I'd say that LRA uses less memory but the timings are somewhat
> useless with the swapping.

On Linux I would normally recommend to use

/usr/bin/time -f 'real=%e user=%U system=%S share=%P%% maxrss=%M ins=%I
outs=%O mfaults=%R waits=%w'

instead of plain time. It gives you much more information
(especially maxrss and waits), so it's more reliable to tell if you 
have a memory problem or not.

-Andi

-- 
ak@linux.intel.com -- Speaking for myself only
Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]