Re: [PATCH v4 0/4] perf tools: LLVM dwarf and flaky test fixes

[Ian Rogers]

On Mon, Nov 9, 2026 at 5:48 AM James Clark <james.clark@xxxxxxxxxx> wrote:
>
> Running the tests on an LLVM build results in some dwarf issues that
> need fixing. And there is an easy fix for some flakiness caused when
> tests are run in parallel.
>
> Assisted by Claude Opus 5.5
>
> Signed-off-by: James Clark <james.clark@xxxxxxxxxx>

For the series:
Tested-by: Ian Rogers <irogers@xxxxxxxxxx>

Thanks,
Ian

> ---
> Changes in v4:
> - Remove unused add_probe_vfs_getname() argument to fix shellcheck.
> - Link to v3: https://patch.msgid.link/20261109-james-perf-test-fixes-v3-0-e8d0a65e618a@xxxxxxxxxx
>
> Changes in v3:
> - Rebase to resolve new conflicts
> - Link to v2: https://patch.msgid.link/20261106-james-perf-test-fixes-v2-0-9a912662f822@xxxxxxxxxx
>
> Changes in v2:
> - Break perf probe line (Namhyung)
> - Use a software event instead of cycles for VM compatibility (Namhyung)
> - Link to v1: https://patch.msgid.link/20261105-james-perf-test-fixes-v1-0-0b279bee5830@xxxxxxxxxx
>
> ---
> James Clark (4):
>       perf libdw: Find the CU by iterating all CUs when aranges are missing
>       perf dwarf-aux: Support DW_OP_addrx locations for global variables
>       perf test probe_vfs_getname: Fix missing debuginfo detection
>       perf test: Don't starve per-process tests with system-wide events
>
>  tools/perf/tests/shell/lib/probe_vfs_getname.sh |  9 ++--
>  tools/perf/tests/shell/record.sh                |  6 +--
>  tools/perf/tests/shell/record_lbr.sh            |  2 +-
>  tools/perf/tests/shell/record_sideband.sh       |  4 +-
>  tools/perf/util/annotate-data.c                 | 27 +---------
>  tools/perf/util/dwarf-aux.c                     | 70 ++++++++++++++++++++++---
>  tools/perf/util/dwarf-aux.h                     |  3 ++
>  tools/perf/util/libdw.c                         | 19 +++----
>  8 files changed, 90 insertions(+), 50 deletions(-)
> ---
> base-commit: 13a8d580433a3b72b10be34f0e26787fe5659d3c
> change-id: 20261104-james-perf-test-fixes-f72265531d1a
>
> Best regards,
> --
> James Clark <james.clark@xxxxxxxxxx>
>