On Fri, 8 Mar 2013, Andi Kleen wrote: > Richard Biener <rguent...@suse.de> writes: > > > This hacky patch tracks per-pass heap usage with -fmem-report > > using glibc malloc hooks (which are deprecated!? eh ... I can > > see no replacement?) > > > > Still somewhat broken accounting for the overall numbers > > (and peak memory use, that is). > > > > But it's a start. And it uses internal glibc allocator > > implementation details ... (eh). At least it's low-overhead. > > I found it much simpler to just LD_PRELOAD tcmalloc and use > its excellent debugging support. > > I think it makes (with debugging disabled) run LTO run > a few percent faster too (but ran those numbers some time > ago)
The point was to eventually amend -ftime-report output with per-pass heap usage as well (in addition to the GC stats it prints). Yes, I know of various tools that can track memory usage - but those are not per-pass nor are they built in. Richard.
