Mike Hommey <mh@xxxxxxxxxxxx> writes: > On Fri, Jul 05, 2019 at 01:14:13AM -0400, Jeff King wrote: >> On Thu, Jul 04, 2019 at 10:13:20PM +0900, Mike Hommey wrote: [...] >> I think I explained all of the memory-usage questions in my earlier >> response, but just for reference: if you have access to it, valgrind's >> "massif" tool is really good for this kind of profiling. Something like: >> >> valgrind --tool=massif git pack-objects ... >> ms_print massif.out.* >> >> which shows heap usage at various times, points out the snapshot with >> peak usage, and shows a backtrace of the main culprits at a few >> snapshots. > > At the expense of time ;) A run would likely last an entire day under > massif (by which I mean a full 24 hours, not a 9-5 day). Valgrind, as I understand it, runs the program under emulation. I wonder if perf / OProfile based solution could help here (gathering memory-based events and metrics). There is also trace2 built-in into Git, but I don't know if it could be used for this purpose or not. Best, -- Jakub Narębski
