diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 4 | ||||
| -rwxr-xr-x | gcc/config/i386/gcc-auto-profile | 70 |
2 files changed, 74 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 850a3ca..84df8a7 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,7 @@ +2016-06-23 Andi Kleen <ak@linux.intel.com> + + * config/i386/gcc-auto-profile: New file. + 2016-06-23 Martin Liska <mliska@suse.cz> PR middle-end/71619 diff --git a/gcc/config/i386/gcc-auto-profile b/gcc/config/i386/gcc-auto-profile new file mode 100755 index 0000000..5da5c63 --- /dev/null +++ b/gcc/config/i386/gcc-auto-profile @@ -0,0 +1,70 @@ +#!/bin/sh +# profile workload for gcc profile feedback (autofdo) using Linux perf +# auto generated. to regenerate for new CPUs run +# contrib/gen_autofdo_event.py --shell --all in gcc source + +# usages: +# gcc-auto-profile program (profile program and children) +# gcc-auto-profile -a sleep X (profile all for X secs, may need root) +# gcc-auto-profile -p PID sleep X (profile PID) +# gcc-auto-profile --kernel -a sleep X (profile kernel) +# gcc-auto-profile --all -a sleep X (profile kernel and user space) + +# identify branches taken event for CPU +# + +FLAGS=u + +if [ "$1" = "--kernel" ] ; then + FLAGS=k + shift +fi +if [ "$1" = "--all" ] ; then + FLAGS=uk + shift +fi + +if ! grep -q Intel /proc/cpuinfo ; then + echo >&2 "Only Intel CPUs supported" + exit 1 +fi + +if grep -q hypervisor /proc/cpuinfo ; then + echo >&2 "Warning: branch profiling may not be functional in VMs" +fi + +case `egrep -q "^cpu family\s*: 6" /proc/cpuinfo && + egrep "^model\s*:" /proc/cpuinfo | head -n1` in +model*:\ 55|\ +model*:\ 77|\ +model*:\ 76) E="cpu/event=0xC4,umask=0xFE/p$FLAGS" ;; +model*:\ 42|\ +model*:\ 45|\ +model*:\ 58|\ +model*:\ 62|\ +model*:\ 60|\ +model*:\ 69|\ +model*:\ 70|\ +model*:\ 63|\ +model*:\ 61|\ +model*:\ 71|\ +model*:\ 86|\ +model*:\ 78|\ +model*:\ 94) E="cpu/event=0xC4,umask=0x20/p$FLAGS" ;; +model*:\ 46|\ +model*:\ 30|\ +model*:\ 31|\ +model*:\ 26|\ +model*:\ 47|\ +model*:\ 37|\ +model*:\ 44) E="cpu/event=0x88,umask=0x40/p$FLAGS" ;; +model*:\ 28|\ +model*:\ 38|\ +model*:\ 39|\ +model*:\ 54|\ +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 $E -b "$@" |