https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86404
--- Comment #4 from Andi Kleen <andi-gcc at firstfloor dot org> --- Does something like this help? (untested, cut-n-pasted, possibly with other values) iff --git a/gcc/config/i386/gcc-auto-profile b/gcc/config/i386/gcc-auto-profile index 5da5c63cd845..8744b9f091df 100755 --- a/gcc/config/i386/gcc-auto-profile +++ b/gcc/config/i386/gcc-auto-profile @@ -67,4 +67,4 @@ model*:\ 53) E="cpu/event=0x88,umask=0x41/p$FLAGS" ;; echo >&2 "Unknown CPU. Run contrib/gen_autofdo_event.py --all --script to update script." exit 1 ;; esac -exec perf record -e $E -b "$@" +exec perf record -m 256K -e $E -b "$@"