Hi, On Mon, Jul 19, 2021, at 23:53, David Rowley wrote: > On Tue, 20 Jul 2021 at 18:17, Andres Freund <and...@anarazel.de> wrote: > > Any chance you could show a `perf annotate AllocSetAlloc` and `perf annotate > > palloc` from a patched run? And perhaps how high their percentages of the > > total work are. E.g. using something like > > perf report -g none|grep -E 'AllocSetAlloc|palloc|MemoryContextAlloc|pfree' > > Sure. See attached. > > David > > Attachments: > * AllocateSetAlloc.txt > * palloc.txt > * percent.txt
Huh, that's interesting. You have some control flow enforcement stuff turned on (the endbr64). And it looks like it has a non zero cost (or maybe it's just skid). Did you enable that intentionally? If not, what compiler/version/distro is it? I think at least on GCC that's -fcf-protection=... Andres
