gcc/config/i386/gcc-auto-profile

   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 --script --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 [ "$1" = "--all" ] ; then
  23   FLAGS=uk
  24   shift
  25 fi
  26
  27 if ! grep -q Intel /proc/cpuinfo ; then
  28   echo >&2 "Only Intel CPUs supported"
  29   exit 1
  30 fi
  31
  32 if grep -q hypervisor /proc/cpuinfo ; then
  33   echo >&2 "Warning: branch profiling may not be functional in VMs"
  34 fi
  35
  36 case `grep -E -q "^cpu family\s*: 6" /proc/cpuinfo &&
  37   grep -E "^model\s*:" /proc/cpuinfo | head -n1` in
  38 model*:\ 46|\
  39 model*:\ 30|\
  40 model*:\ 31|\
  41 model*:\ 26|\
  42 model*:\ 47|\
  43 model*:\ 37|\
  44 model*:\ 44) E="cpu/event=0x88,umask=0x40/$FLAGS" ;;
  45 model*:\ 55|\
  46 model*:\ 74|\
  47 model*:\ 77|\
  48 model*:\ 76|\
  49 model*:\ 90|\
  50 model*:\ 92|\
  51 model*:\ 95|\
  52 model*:\ 87|\
  53 model*:\ 133|\
  54 model*:\ 122) E="cpu/event=0xC4,umask=0xFE/p$FLAGS" ;;
  55 model*:\ 28|\
  56 model*:\ 38|\
  57 model*:\ 39|\
  58 model*:\ 54|\
  59 model*:\ 53) E="cpu/event=0x88,umask=0x41/$FLAGS" ;;
  60 model*:\ 42|\
  61 model*:\ 45|\
  62 model*:\ 58|\
  63 model*:\ 62|\
  64 model*:\ 60|\
  65 model*:\ 69|\
  66 model*:\ 70|\
  67 model*:\ 63|\
  68 model*:\ 61|\
  69 model*:\ 71|\
  70 model*:\ 79|\
  71 model*:\ 86|\
  72 model*:\ 78|\
  73 model*:\ 94|\
  74 model*:\ 142|\
  75 model*:\ 158|\
  76 model*:\ 165|\
  77 model*:\ 166|\
  78 model*:\ 85|\
  79 model*:\ 85) E="cpu/event=0xC4,umask=0x20/p$FLAGS" ;;
  80 model*:\ 125|\
  81 model*:\ 126|\
  82 model*:\ 167|\
  83 model*:\ 140|\
  84 model*:\ 141|\
  85 model*:\ 143|\
  86 model*:\ 207|\
  87 model*:\ 106|\
  88 model*:\ 108) E="cpu/event=0xc4,umask=0x20/p$FLAGS" ;;
  89 model*:\ 134|\
  90 model*:\ 150|\
  91 model*:\ 156|\
  92 model*:\ 190) E="cpu/event=0xc4,umask=0xfe/p$FLAGS" ;;
  93 *)
  94 echo >&2 "Unknown CPU. Run contrib/gen_autofdo_event.py --all --script to update script."
  95         exit 1 ;;
  96 esac
  97 set -x
  98 if ! perf record -e $E -b "$@" ; then
  99   # PEBS may not actually be working even if the processor supports it
 100   # (e.g., in a virtual machine). Trying to run without /p.
 101   set +x
 102   echo >&2 "Retrying without /p."
 103   E="$(echo "${E}" | sed -e 's/\/p/\//')"
 104   set -x
 105   exec perf record -e $E -b "$@"
 106  set +x
 107 fi