linux-stable.git/tools/perf/scripts/python, branch master

perf test cs-etm: Make disassembly test use kcore

2026-06-10T21:55:49+00:00

Hits in modules return empty disassembly with vmlinux as an input to
objdump. Make the disassembly test more reliable by always using kcore.
And update the comments to say that this is supported by the script.

Signed-off-by: James Clark 
Cc: Amir Ayupov 
Cc: Ian Rogers 
Cc: Jiri Olsa 
Cc: Jonathan Corbet 
Cc: Leo Yan 
Cc: Mike Leach 
Cc: Namhyung Kim 
Cc: Paschalis Mpeis 
Cc: Shuah Khan 
Cc: Suzuki Poulouse 
Signed-off-by: Arnaldo Carvalho de Melo

perf script: Fix script_fetch_insn for more than just x86

2026-01-27T04:35:22+00:00

The script_fetch_insn code was only supported on natively running x86.

Implement a crude elf_machine_max_instruction_length function and use to
give an instruction length on more than just x86.

Use the ELF machine to determine the length to use to support
cross-architecture development.

Signed-off-by: Ian Rogers 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Andi Kleen 
Cc: Ingo Molnar 
Cc: James Clark 
Cc: Jiri Olsa 
Cc: Leo Yan 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Shimin Guo 
Cc: Yujie Liu 
[ Conditionally define EM_CSKY and EM_LOONGARCH for older distros ]
Signed-off-by: Arnaldo Carvalho de Melo

perf flamegraph: Fix minor pylint/type hint issues

2025-07-16T17:43:27+00:00

Switch to assuming python3. Fix minor pylint issues on line length,
repeated compares, not using f-strings and variable case. Add type
hints and check with mypy.

Signed-off-by: Ian Rogers 
Tested-by: Namhyung Kim 
Link: https://lore.kernel.org/r/20250716004635.31161-1-irogers@google.com
Signed-off-by: Namhyung Kim

perf script: Add -e option to flamegraph script

2025-06-24T17:27:51+00:00

When processing the perf data file generated with multiple events,
the flamegraph script will count all the events regardless of
different event names.

This patch tries to add a -e option to specify the event name that
the flamegraph will be generated accordingly. If the -e option omitted,
the behavior remains unchanged.

Signed-off-by: Tianyou Li 
Reviewed-by: Pan Deng 
Reviewed-by: Zhiguo Zhou 
Reviewed-by: Wangyang Guo 
Reviewed-by: Tim Chen 
Link: https://lore.kernel.org/r/20250610040536.2390060-2-tianyou.li@intel.com
Signed-off-by: Namhyung Kim

perf script: Handle -i option for perf script flamegraph

2025-06-24T17:27:50+00:00

If specify the perf data file with -i option, the script will try to
read the header information regardless of the file name specified,
instead it will try to access the perf.data. This simple patch use the
file name from -i option for command perf report --header-only to read
the header.

Signed-off-by: Tianyou Li 
Reviewed-by: Pan Deng 
Reviewed-by: Zhiguo Zhou 
Reviewed-by: Wangyang Guo 
Reviewed-by: Tim Chen 
Link: https://lore.kernel.org/r/20250610040536.2390060-1-tianyou.li@intel.com
Signed-off-by: Namhyung Kim

perf scripts python: exported-sql-viewer.py: Fix pattern matching with Python 3

2025-05-12T17:18:16+00:00

The script allows the user to enter patterns to find symbols.

The pattern matching characters are converted for use in SQL.

For PostgreSQL the conversion involves using the Python maketrans()
method which is slightly different in Python 3 compared with Python 2.

Fix to work in Python 3.

Fixes: beda0e725e5f06ac ("perf script python: Add Python3 support to exported-sql-viewer.py")
Signed-off-by: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Ian Rogers 
Cc: Jiri Olsa 
Cc: Kan Liang 
Cc: Namhyung Kim 
Cc: Tony Jones 
Link: https://lore.kernel.org/r/20250512093932.79854-4-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo

perf script: Fix hangup in offline flamegraph report

2025-02-19T00:12:19+00:00

A recent change in the flamegraph script fixed an issue with live mode
but it created another for offline mode.  It needs to pass "-" to -i
option to read from stdin in the live mode.  Actually there's a logic
to pass the option in the perf script code, but the script was written
with "-- $@" which prevented the option to go to the perf script.  So
the previous commit added the hard-coded "-i -" to the report command.

But it's a problem for the offline mode which expects input from a file
and now it's stuck on reading from stdin.  Let's remove the "-i - --"
part and let it pass the options properly to perf script.

Closes: https://lore.kernel.org/linux-perf-users/c41e4b04-e1fd-45ab-80b0-ec2ac6e94310@linux.ibm.com
Fixes: 23e0a63c6dd3f69c ("perf script: force stdin for flamegraph in live mode")
Reported-by: Thomas Richter 
Tested-by: Thomas Richter 
Cc: Anubhav Shelat 
Signed-off-by: Namhyung Kim

perf script: force stdin for flamegraph in live mode

2025-02-04T03:49:10+00:00

Currently, running "perf script flamegraph -a -F 99 sleep 1" should
produce flamegraph.html containing the flamegraph. Howevever, it gives a
segmentation fault.

This is caused because the flamegraph.py script is
supposed to take as input the output of "perf record", which should be
in stdin. This would require passing "-i -" to flamegraph.py. However,
the "flamegraph-report" script causes "perf script" command to take the
"-i -" option instead of flamegraph.py, which causes no problem for
"perf script", but causes a seg fault since flamegraph.py has no input
file. To fix this I added the "-i -" option directly to the
flamegraph-report script to ensure flamegraph.py gets input from stdin.

Signed-off-by: Anubhav Shelat 
Tested-by: Michael Petlan 
Link: https://lore.kernel.org/r/20250131145704.3164542-2-ashelat@redhat.com
Signed-off-by: Namhyung Kim

perf script: Move script_fetch_insn to trace-event-scripting.c

2024-12-18T19:24:32+00:00

Add native_arch as a parameter to script_fetch_insn rather than
relying on the builtin-script value that won't be initialized for the
dlfilter and python Context use cases. Assume both of those cases are
running natively.

Signed-off-by: Ian Rogers 
Tested-by: Arnaldo Carvalho de Melo 
Acked-by: Arnaldo Carvalho de Melo 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Andi Kleen 
Cc: Athira Rajeev 
Cc: Colin Ian King 
Cc: Dapeng Mi 
Cc: Howard Chu 
Cc: Ilya Leoshkevich 
Cc: Ingo Molnar 
Cc: James Clark 
Cc: Jiri Olsa 
Cc: Josh Poimboeuf 
Cc: Kan Liang 
Cc: Mark Rutland 
Cc: Michael Petlan 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Thomas Richter 
Cc: Veronika Molnarova 
Cc: Weilin Wang 
Link: https://lore.kernel.org/r/20241119011644.971342-11-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo

perf python: Remove python 2 scripting support

2024-12-18T19:24:32+00:00

Python2 was deprecated 4 years ago, remove support and workarounds.

Signed-off-by: Ian Rogers 
Acked-by: Arnaldo Carvalho de Melo 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Andi Kleen 
Cc: Athira Rajeev 
Cc: Colin Ian King 
Cc: Dapeng Mi 
Cc: Howard Chu 
Cc: Ilya Leoshkevich 
Cc: Ingo Molnar 
Cc: James Clark 
Cc: Jiri Olsa 
Cc: Josh Poimboeuf 
Cc: Kan Liang 
Cc: Mark Rutland 
Cc: Michael Petlan 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Thomas Richter 
Cc: Veronika Molnarova 
Cc: Weilin Wang 
Link: https://lore.kernel.org/r/20241119011644.971342-2-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo