On Mon, Nov 10, 2014 at 10:16 AM, Bin Cheng <bin.ch...@arm.com> wrote: > Hi, > There is parameter max-pending-list-length in gcc scheduler, but the > parameter is checked using greater than condition. As a result, the real > max pending list length is actually "max-pending-list-length + 1". This > patch fixes this by using ">=" rather than ">" comparison operator. Though > it is kind of nit-picking, I want to change this: a) it breaks sched-fusion > because the 33rd couldn't be paired; b) when sched-fusion tries to sort many > consecutive stores, it breaks dcache line alignment at large probability. I > mean without cache sensitive optimizer, GCC breaks dcache line alignment > randomly, but 33 is definitely worse than 32. Of course, this only happens > in very restricted case. > > Bootstrap and test on x86_64. Is it OK?
Ok. Thanks, Richard. > 2014-11-10 Bin Cheng <bin.ch...@arm.com> > > * sched-deps.c (sched_analyze_1): Check pending list if it is not > less than MAX_PENDING_LIST_LENGTH. > (sched_analyze_2, sched_analyze_insn, deps_analyze_insn): Ditto.
