From: Namhyung Kim <namhyung@kernel.org>
To: Thomas Richter <tmricht@linux.ibm.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>,
Ian Rogers <irogers@google.com>,
James Clark <james.clark@linaro.org>,
Jiri Olsa <jolsa@kernel.org>,
Adrian Hunter <adrian.hunter@intel.com>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
linux-perf-users@vger.kernel.org,
Steven Rostedt <rostedt@goodmis.org>,
Josh Poimboeuf <jpoimboe@kernel.org>,
Indu Bhagat <indu.bhagat@oracle.com>,
Jens Remus <jremus@linux.ibm.com>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
linux-trace-kernel@vger.kernel.org, bpf@vger.kernel.org
Subject: Re: [PATCH v6 3/6] perf record: Add --call-graph fp,defer option for deferred callchains
Date: Mon, 24 Nov 2025 12:27:45 -0800 [thread overview]
Message-ID: <aSS_wR973EKsdW-B@google.com> (raw)
In-Reply-To: <947ef366-435d-4b05-b0b1-685e569d0a1e@linux.ibm.com>
Hello,
On Fri, Nov 21, 2025 at 07:26:34AM +0100, Thomas Richter wrote:
> On 11/21/25 00:48, Namhyung Kim wrote:
> > Add a new callchain record mode option for deferred callchains. For now
> > it only works with FP (frame-pointer) mode.
> >
> > And add the missing feature detection logic to clear the flag on old
> > kernels.
> >
> > $ perf record --call-graph fp,defer -vv true
>
> Does this also works for dwarf format?
> # perf record --call-graph dwarf,defer ....
No, it's not supported. Maybe we can do similar just to dump stack
content and registers for dwarf before returning to user.
Thanks,
Namhyung
next prev parent reply other threads:[~2025-11-24 20:27 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-20 23:47 [PATCHSET v6 0/6] perf tools: Add deferred callchain support Namhyung Kim
2025-11-20 23:47 ` [PATCH v6 1/6] tools headers UAPI: Sync linux/perf_event.h for deferred callchains Namhyung Kim
2025-11-20 23:48 ` [PATCH v6 2/6] perf tools: Minimal DEFERRED_CALLCHAIN support Namhyung Kim
2025-11-20 23:48 ` [PATCH v6 3/6] perf record: Add --call-graph fp,defer option for deferred callchains Namhyung Kim
2025-11-21 6:26 ` Thomas Richter
2025-11-24 20:27 ` Namhyung Kim [this message]
2025-12-03 5:49 ` Namhyung Kim
2025-11-20 23:48 ` [PATCH v6 4/6] perf script: Display PERF_RECORD_CALLCHAIN_DEFERRED Namhyung Kim
2025-12-12 12:11 ` Jens Remus
2025-11-20 23:48 ` [PATCH v6 5/6] perf tools: Merge deferred user callchains Namhyung Kim
2025-12-02 23:14 ` Ian Rogers
2025-12-03 0:01 ` Namhyung Kim
2025-12-12 11:16 ` Jens Remus
2025-12-12 11:48 ` Jens Remus
2025-11-20 23:48 ` [PATCH v6 6/6] perf tools: Flush remaining samples w/o deferred callchains Namhyung Kim
2025-12-02 23:15 ` Ian Rogers
2025-12-03 17:58 ` [PATCHSET v6 0/6] perf tools: Add deferred callchain support Namhyung Kim
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