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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182#!/bin/bash# python profiling with jitdump# SPDX-License-Identifier: GPL-2.0
SHELLDIR=$(dirname $0)# shellcheck source=lib/setup_python.sh. "${SHELLDIR}"/lib/setup_python.sh
OUTPUT=$(${PYTHON} -Xperf_jit -c 'import os, sys; print(os.getpid(), sys.is_stack_trampoline_active())' 2> /dev/null)PID=${OUTPUT% *}HAS_PERF_JIT=${OUTPUT#* }
rm -f /tmp/jit-${PID}.dump 2> /dev/nullif [ "${HAS_PERF_JIT}" != "True" ]; then echo "SKIP: python JIT dump is not available" exit 2fi
PERF_DATA=$(mktemp /tmp/__perf_test.perf.data.XXXXXX)
cleanup() { echo "Cleaning up files..." rm -f ${PERF_DATA} ${PERF_DATA}.jit /tmp/jit-${PID}.dump /tmp/jitted-${PID}-*.so 2> /dev/null
trap - EXIT TERM INT}
trap_cleanup() { echo "Unexpected termination" cleanup exit 1}
trap trap_cleanup EXIT TERM INT
echo "Run python with -Xperf_jit"cat <<EOF | perf record -k 1 -g --call-graph dwarf -o "${PERF_DATA}" \ -- ${PYTHON} -Xperf_jitdef foo(n): result = 0 for _ in range(n): result += 1 return result
def bar(n): foo(n)
def baz(n): bar(n)
if __name__ == "__main__": baz(1000000)EOF
# extract PID of the target process from the data_PID=$(perf report -i "${PERF_DATA}" -F pid -q -g none | cut -d: -f1 -s)PID=$(echo -n $_PID) # remove newlines
echo "Generate JIT-ed DSOs using perf inject"DEBUGINFOD_URLS='' perf inject -i "${PERF_DATA}" -j -o "${PERF_DATA}.jit"
echo "Add JIT-ed DSOs to the build-ID cache"for F in /tmp/jitted-${PID}-*.so; do perf buildid-cache -a "${F}"done
echo "Check the symbol containing the function/module name"NUM=$(perf report -i "${PERF_DATA}.jit" -s sym | grep -cE 'py::(foo|bar|baz):<stdin>')
echo "Found ${NUM} matching lines"
echo "Remove JIT-ed DSOs from the build-ID cache"for F in /tmp/jitted-${PID}-*.so; do perf buildid-cache -r "${F}"done
cleanup
if [ "${NUM}" -eq 0 ]; then exit 1fi