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c9cd0c7e52
Add a test case for the python interpreter like below so that we can make sure it won't break again. To validate the effect of build-ID generation, it adds and removes the JIT'ed DSOs to/from the build-ID cache for the test. $ perf test -vv jitdump 84: python profiling with jitdump: --- start --- test child forked, pid 214316 Run python with -Xperf_jit [ perf record: Woken up 5 times to write data ] [ perf record: Captured and wrote 1.180 MB /tmp/__perf_test.perf.data.XbqZNm (140 samples) ] Generate JIT-ed DSOs using perf inject Add JIT-ed DSOs to the build-ID cache Check the symbol containing the script name Found 108 matching lines Remove JIT-ed DSOs from the build-ID cache ---- end(0) ---- 84: python profiling with jitdump : Ok Cc: Pablo Galindo <pablogsal@gmail.com> Link: https://docs.python.org/3/howto/perf_profiling.html#how-to-work-without-frame-pointers Signed-off-by: Namhyung Kim <namhyung@kernel.org>
82 lines
1.9 KiB
Bash
Executable File
82 lines
1.9 KiB
Bash
Executable File
#!/bin/bash
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# python profiling with jitdump
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# SPDX-License-Identifier: GPL-2.0
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SHELLDIR=$(dirname $0)
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# shellcheck source=lib/setup_python.sh
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. "${SHELLDIR}"/lib/setup_python.sh
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OUTPUT=$(${PYTHON} -Xperf_jit -c 'import os, sys; print(os.getpid(), sys.is_stack_trampoline_active())' 2> /dev/null)
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PID=${OUTPUT% *}
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HAS_PERF_JIT=${OUTPUT#* }
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rm -f /tmp/jit-${PID}.dump 2> /dev/null
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if [ "${HAS_PERF_JIT}" != "True" ]; then
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echo "SKIP: python JIT dump is not available"
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exit 2
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fi
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PERF_DATA=$(mktemp /tmp/__perf_test.perf.data.XXXXXX)
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cleanup() {
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echo "Cleaning up files..."
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rm -f ${PERF_DATA} ${PERF_DATA}.jit /tmp/jit-${PID}.dump /tmp/jitted-${PID}-*.so 2> /dev/null
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trap - EXIT TERM INT
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}
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trap_cleanup() {
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echo "Unexpected termination"
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cleanup
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exit 1
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}
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trap trap_cleanup EXIT TERM INT
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echo "Run python with -Xperf_jit"
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cat <<EOF | perf record -k 1 -g --call-graph dwarf -o "${PERF_DATA}" \
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-- ${PYTHON} -Xperf_jit
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def foo(n):
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result = 0
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for _ in range(n):
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result += 1
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return result
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def bar(n):
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foo(n)
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def baz(n):
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bar(n)
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if __name__ == "__main__":
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baz(1000000)
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EOF
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# extract PID of the target process from the data
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_PID=$(perf report -i "${PERF_DATA}" -F pid -q -g none | cut -d: -f1 -s)
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PID=$(echo -n $_PID) # remove newlines
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echo "Generate JIT-ed DSOs using perf inject"
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DEBUGINFOD_URLS='' perf inject -i "${PERF_DATA}" -j -o "${PERF_DATA}.jit"
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echo "Add JIT-ed DSOs to the build-ID cache"
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for F in /tmp/jitted-${PID}-*.so; do
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perf buildid-cache -a "${F}"
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done
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echo "Check the symbol containing the function/module name"
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NUM=$(perf report -i "${PERF_DATA}.jit" -s sym | grep -cE 'py::(foo|bar|baz):<stdin>')
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echo "Found ${NUM} matching lines"
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echo "Remove JIT-ed DSOs from the build-ID cache"
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for F in /tmp/jitted-${PID}-*.so; do
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perf buildid-cache -r "${F}"
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done
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cleanup
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if [ "${NUM}" -eq 0 ]; then
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exit 1
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fi
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