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gcc-auto-profile revision 1.1 
      1 #!/bin/sh
      2 # profile workload for gcc profile feedback (autofdo) using Linux perf
      3 # auto generated. to regenerate for new CPUs run
      4 # contrib/gen_autofdo_event.py --shell --all in gcc source
      5 
      6 # usages:
      7 # gcc-auto-profile program             (profile program and children)
      8 # gcc-auto-profile -a sleep X          (profile all for X secs, may need root)
      9 # gcc-auto-profile -p PID sleep X      (profile PID)
     10 # gcc-auto-profile --kernel -a sleep X (profile kernel)
     11 # gcc-auto-profile --all -a sleep X    (profile kernel and user space)
     12 
     13 # identify branches taken event for CPU
     14 #
     15 
     16 FLAGS=u
     17 
     18 if [ "$1" = "--kernel" ] ; then
     19   FLAGS=k
     20   shift
     21 fi
     22 if [ "$1" = "--all" ] ; then
     23   FLAGS=uk
     24   shift
     25 fi
     26 
     27 if ! grep -q Intel /proc/cpuinfo ; then
     28   echo >&2 "Only Intel CPUs supported"
     29   exit 1
     30 fi
     31 
     32 if grep -q hypervisor /proc/cpuinfo ; then
     33   echo >&2 "Warning: branch profiling may not be functional in VMs"
     34 fi
     35 
     36 case `egrep -q "^cpu family\s*: 6" /proc/cpuinfo &&
     37   egrep "^model\s*:" /proc/cpuinfo | head -n1` in
     38 model*:\ 55|\
     39 model*:\ 77|\
     40 model*:\ 76) E="cpu/event=0xC4,umask=0xFE/p$FLAGS" ;;
     41 model*:\ 42|\
     42 model*:\ 45|\
     43 model*:\ 58|\
     44 model*:\ 62|\
     45 model*:\ 60|\
     46 model*:\ 69|\
     47 model*:\ 70|\
     48 model*:\ 63|\
     49 model*:\ 61|\
     50 model*:\ 71|\
     51 model*:\ 86|\
     52 model*:\ 78|\
     53 model*:\ 94) E="cpu/event=0xC4,umask=0x20/p$FLAGS" ;;
     54 model*:\ 46|\
     55 model*:\ 30|\
     56 model*:\ 31|\
     57 model*:\ 26|\
     58 model*:\ 47|\
     59 model*:\ 37|\
     60 model*:\ 44) E="cpu/event=0x88,umask=0x40/p$FLAGS" ;;
     61 model*:\ 28|\
     62 model*:\ 38|\
     63 model*:\ 39|\
     64 model*:\ 54|\
     65 model*:\ 53) E="cpu/event=0x88,umask=0x41/p$FLAGS" ;;
     66 *)
     67 echo >&2 "Unknown CPU. Run contrib/gen_autofdo_event.py --all --script to update script."
     68 	exit 1 ;;
     69 esac
     70 exec perf record -e $E -b "$@"
     71