On Thu, 5 Feb 2026 10:26:10 -0800
Namhyung Kim [off-list ref] wrote:
quoted
Namhyung Kim's related perf tools deferred callchain support can be used
for testing ("perf record --call-graph fp,defer" and "perf report/script").
Is it possible for users to choose the unwinder - frame pointer or
SFrame at runtime? I feel like the option should be
"--call-graph sframe,defer" or just "--call-graph sframe" if it always
uses deferred unwinding.
Currently no, and I'm not sure we want that do we? The idea is to use the
best option that is available. Why use frame pointers if sframe is
available and it's being called with defer?
If there's no defer, then sframes are not available, so it defaults to the
best option available (which will likely be frame pointers).
-- Steve