Re: [PATCH v4 00/49] perf: Complete transition to standalone Python scripts

[Arnaldo Carvalho de Melo]

On Fri, Sep 25, 2026 at 11:19:27PM -0700, Ian Rogers wrote:
> The perf script command has historically supported running Python and Perl
> scripts by embedding libpython and libperl. That approach has several
> drawbacks:
>  - high overhead from constructing Python dictionaries for every event
>    (whether used by the script or not),
>  - complex build dependencies on specific Python/Perl libraries,
>  - threading and interpreter lifecycle complications from embedding the
>    interpreter inside perf,
>  - no unified model for standalone scripts such as ilist.py, treport.py,
>    tracepoint.py, and twatch.py.

So I applied it and tested on the containers, make -C tools/perf
build-test and 'perf test', that has some flakiness running the new
tests for these python scripts in parallel, nothing that prevents it
from being merged now tho:

=== Test Summary ===
Passed main tests : 146
Passed subtests   : 156
Skipped tests     : 28
Failed tests      : 13
List of failed tests:
   72: Test dwarf unwind
   88: daemon operations
  101: perf kvm tests
  111: perf record tests
  112: perf record sample filtering (by BPF) tests
  117: perf sched tests
  137: check-perf-trace python test
  138: compaction-times python test
  141: failed-syscalls-by-pid python test
  142: failed-syscalls python test
  144: futex-contention python test
  157: sctop python test
  159: stat-cpi python test
root@x2:~# perf test 72
 72: Test dwarf unwind                                                                                         : Ok

=== Test Summary ===
Passed main tests : 1
Passed subtests   : 0
Skipped tests     : 0
Failed tests      : 0
root@x2:~# perf test 88
 88: daemon operations                                                                                         : Ok

=== Test Summary ===
Passed main tests : 1
Passed subtests   : 0
Skipped tests     : 0
Failed tests      : 0
root@x2:~# perf test 101
101: perf kvm tests                                                                                            : Ok

=== Test Summary ===
Passed main tests : 1
Passed subtests   : 0
Skipped tests     : 0
Failed tests      : 0
root@x2:~# perf test 112 ; perf test 117 ; perf test 137 ; perf test 141 ; perf test 142 ; perf test 144 ; perf test 157; perf test 159
112: perf record sample filtering (by BPF) tests                                                               : Ok

=== Test Summary ===
Passed main tests : 1
Passed subtests   : 0
Skipped tests     : 0
Failed tests      : 0
117: perf sched tests                                                                                          : Ok

=== Test Summary ===
Passed main tests : 1
Passed subtests   : 0
Skipped tests     : 0
Failed tests      : 0
137: check-perf-trace python test                                                                              : Ok

=== Test Summary ===
Passed main tests : 1
Passed subtests   : 0
Skipped tests     : 0
Failed tests      : 0
141: failed-syscalls-by-pid python test                                                                        : Ok

=== Test Summary ===
Passed main tests : 1
Passed subtests   : 0
Skipped tests     : 0
Failed tests      : 0
142: failed-syscalls python test                                                                               : Ok

=== Test Summary ===
Passed main tests : 1
Passed subtests   : 0
Skipped tests     : 0
Failed tests      : 0
144: futex-contention python test                                                                              : Ok

=== Test Summary ===
Passed main tests : 1
Passed subtests   : 0
Skipped tests     : 0
Failed tests      : 0
157: sctop python test                                                                                         : Ok

=== Test Summary ===
Passed main tests : 1
Passed subtests   : 0
Skipped tests     : 0
Failed tests      : 0
159: stat-cpi python test                                                                                      : Ok

=== Test Summary ===
Passed main tests : 1
Passed subtests   : 0
Skipped tests     : 0
Failed tests      : 0
root@x2:~# uname -a
Linux x2 7.2.5-200.fc44.x86_64 #1 SMP PREEMPT_DYNAMIC Fri Sep 11 15:11:05 UTC 2026 x86_64 GNU/Linux
root@x2:~# cat /etc/os-release
NAME="Fedora Linux"
VERSION="44 (Workstation Edition)"
RELEASE_TYPE=stable
ID=fedora
VERSION_ID=44
VERSION_CODENAME=""
PRETTY_NAME="Fedora Linux 44 (Workstation Edition)"
ANSI_COLOR="0;38;2;60;110;180"
LOGO=fedora-logo-icon
CPE_NAME="cpe:/o:fedoraproject:fedora:44"
DEFAULT_HOSTNAME="fedora"
HOME_URL="https://fedoraproject.org/";
DOCUMENTATION_URL="https://docs.fedoraproject.org/en-US/fedora/f44/";
SUPPORT_URL="https://ask.fedoraproject.org/";
BUG_REPORT_URL="https://bugzilla.redhat.com/";
REDHAT_BUGZILLA_PRODUCT="Fedora"
REDHAT_BUGZILLA_PRODUCT_VERSION=44
REDHAT_SUPPORT_PRODUCT="Fedora"
REDHAT_SUPPORT_PRODUCT_VERSION=44
SUPPORT_END=2027-05-19
VARIANT="Workstation Edition"
VARIANT_ID=workstation
root@x2:~#