On Wed, Aug 3, 2011 at 2:06 PM, Jan Hubicka <hubi...@ucw.cz> wrote: >> In xalancbmk, with the partition option, most of object files have >> nonzero size cold sections generated. The text size of the binary is >> increased to 3572728 bytes from 3466790 bytes. Profiling the program >> using the training input shows the following differences. With >> partitioning, number of executed branch instructions slightly >> increases, but itlb misses and icache load misses are significantly >> lower compared with the binary without partitioning. >> >> >> David >> >> With partition: >> ----------------- >> 53654937239 branches >> 306751458 L1-icache-load-misses >> 8146112 iTLB-load-misses > > Note that I was also planning for some time to introduce notion of provably > cold > stuff into our branch prediction heurstics. I.e. code leading to aborts, eh > etc
no-return attribute is looked at by static profile estimation pass. Is the attribute (definitely not returning) properly propagated to the callers (wrappers of exit, etc)? David > that can be then offlined even w/o profile feedback and could perhaps help > to large apps. > (also the whole pass should be more effective with larger testcases, SPEC2k6 > is slowly > becoming a small one) > > Honza >
