71 lines
1.6 KiB
Plaintext
71 lines
1.6 KiB
Plaintext
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#!/bin/sh
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# profile workload for gcc profile feedback (autofdo) using Linux perf
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# auto generated. to regenerate for new CPUs run
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# contrib/gen_autofdo_event.py --shell --all in gcc source
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# usages:
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# gcc-auto-profile program (profile program and children)
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# gcc-auto-profile -a sleep X (profile all for X secs, may need root)
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# gcc-auto-profile -p PID sleep X (profile PID)
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# gcc-auto-profile --kernel -a sleep X (profile kernel)
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# gcc-auto-profile --all -a sleep X (profile kernel and user space)
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# identify branches taken event for CPU
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#
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FLAGS=u
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if [ "$1" = "--kernel" ] ; then
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FLAGS=k
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shift
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fi
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if [ "$1" = "--all" ] ; then
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FLAGS=uk
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shift
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fi
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if ! grep -q Intel /proc/cpuinfo ; then
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echo >&2 "Only Intel CPUs supported"
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exit 1
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fi
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if grep -q hypervisor /proc/cpuinfo ; then
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echo >&2 "Warning: branch profiling may not be functional in VMs"
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fi
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case `egrep -q "^cpu family\s*: 6" /proc/cpuinfo &&
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egrep "^model\s*:" /proc/cpuinfo | head -n1` in
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model*:\ 55|\
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model*:\ 77|\
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model*:\ 76) E="cpu/event=0xC4,umask=0xFE/p$FLAGS" ;;
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model*:\ 42|\
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model*:\ 45|\
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model*:\ 58|\
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model*:\ 62|\
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model*:\ 60|\
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model*:\ 69|\
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model*:\ 70|\
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model*:\ 63|\
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model*:\ 61|\
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model*:\ 71|\
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model*:\ 86|\
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model*:\ 78|\
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model*:\ 94) E="cpu/event=0xC4,umask=0x20/p$FLAGS" ;;
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model*:\ 46|\
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model*:\ 30|\
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model*:\ 31|\
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model*:\ 26|\
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model*:\ 47|\
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model*:\ 37|\
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model*:\ 44) E="cpu/event=0x88,umask=0x40/p$FLAGS" ;;
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model*:\ 28|\
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model*:\ 38|\
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model*:\ 39|\
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model*:\ 54|\
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model*:\ 53) E="cpu/event=0x88,umask=0x41/p$FLAGS" ;;
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*)
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echo >&2 "Unknown CPU. Run contrib/gen_autofdo_event.py --all --script to update script."
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exit 1 ;;
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esac
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exec perf record -e $E -b "$@"
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