mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-11-02 15:44:09 +01:00
James Clark
a9aa5c5e40
The minimum required shellcheck version treats paths with leading variables as starting from the script's current directory, so shellcheck is able to source all of these files without needing the extra directives: v0.7.2 - 2021-04-19 Changed * SC1090: A leading $x/ or $(x)/ is now treated as ./ when locating files Remove them to avoid future copy pasting and confusion that they are required. Because the paths weren't actually followed, they didn't have to be accurate and accepted any string to silence the warning. Signed-off-by: James Clark <[email protected]> Acked-by: Namhyung Kim <[email protected]> Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
108 lines
2.7 KiB
Bash
Executable File
108 lines
2.7 KiB
Bash
Executable File
#!/bin/bash
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# python profiling with jitdump
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# SPDX-License-Identifier: GPL-2.0
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SHELLDIR=$(dirname $0)
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. "${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_DIR=$(mktemp -d /tmp/__perf_test.perf.data.dir.XXXXXX)
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PERF_DATA="${PERF_DATA_DIR}/perf.data"
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cleanup() {
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echo "Cleaning up files..."
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rm -rf ${PERF_DATA_DIR} 2> /dev/null
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for p in ${ALL_PIDS}; do
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rm -f /tmp/jit-${p}.dump /tmp/jitted-${p}-*.so 2> /dev/null
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done
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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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ALL_PIDS=""
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NUM=0
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for iterations in 1000000 10000000 50000000 100000000; do
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echo "Running with $iterations iterations..."
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rm -f "${PERF_DATA}.pid"
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cat <<EOF | perf record -k 1 -g --call-graph dwarf -o "${PERF_DATA}" -- ${PYTHON} -Xperf_jit
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import os
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with open("${PERF_DATA}.pid", "w") as f:
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f.write(str(os.getpid()))
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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($iterations)
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EOF
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if [ -f "${PERF_DATA}.pid" ]; then
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REAL_PID=$(cat "${PERF_DATA}.pid")
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ALL_PIDS="${ALL_PIDS} ${REAL_PID}"
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fi
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# extract PID of the target process from the data
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PID=$(perf report -i "${PERF_DATA}" --stdio -F pid -q -g none | \
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cut -d: -f1 -s | sort -u | head -n 1 | tr -d ' ')
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if [ -z "${PID}" ]; then
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echo "Failed to get PID, retrying..."
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continue
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fi
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ALL_PIDS="${ALL_PIDS} ${PID}"
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echo "Generate JIT-ed DSOs using perf inject"
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DEBUGINFOD_URLS='' perf inject -i "${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 "${PERF_DATA}.jit" -s sym --stdio | grep -cE 'py::(foo|bar|baz):<stdin>')
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echo "Remove JIT-ed DSOs from the build-ID cache"
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for F in /tmp/jitted-${PID}-*.so; do
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perf buildid-cache -r "${F}"
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done
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rm -f /tmp/jitted-${PID}-*.so /tmp/jit-${PID}.dump 2>/dev/null
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if [ "${NUM}" -gt 0 ]; then
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echo "Success: found ${NUM} matching lines"
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break
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fi
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echo "No matching lines found, retrying with more iterations..."
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done
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cleanup
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if [ "${NUM}" -eq 0 ]; then
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exit 1
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fi
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