From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 64EE0276051; Tue, 13 Jan 2026 20:37:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768336636; cv=none; b=a56REvI1DddjaS/C2OutWLdQUPYwe8cX9gp1hQ439mMuYu6JiHEwyn5+4oCb2NzEoXHfge+A2DmlbhrChdC0DHFYaIut9GxMlMc9pY+b9zVIPW5hkpqTXluD1OkOUzxIRozTsqNjbqS4AorxVSqX6lqqxpNB0pl0m3XUQBOMeAU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768336636; c=relaxed/simple; bh=2psVcCOAJwKUDvmp4EQXRRArsO4jM8L1xUaqvE+6wMI=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=TxnoJiaXHTUgaErWf6KCt++4Qjv0L6c9psZDM+uLiAgdTDsBSOITpSQRkDjSQSgX0JxhRV1KCzo05kkqMvdc1N5LjXGPYtExcvH7NppSFqAFEaOgHMkejDULa7AXKjyW91BcD1iED5o1Jhih4Ov1CmSKUs+Hf1Ujk4CbhDtS378= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Dz5ug+uw; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Dz5ug+uw" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B17D0C116C6; Tue, 13 Jan 2026 20:37:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1768336636; bh=2psVcCOAJwKUDvmp4EQXRRArsO4jM8L1xUaqvE+6wMI=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Dz5ug+uwLpHw2ZkTrKWJMSX4PKTORiBxYKEJ+8LLTDThZb0bPa1MhYEeOkxTaq41h AoxZJTcB55ien7jl7MGbw/UMMwcBQIi2vZ3j82pJr6mJMZJnz5jVS4Wd+7C3BBFNZr 2zGYd0bBPQvGmFxc2VazTtI5Nrp5H4OCeS62P3MEkeD0q+8QAJ2pcTkdGdGWbZF4hF 10XJnAseKljkHjXYDjZ9J7RF59Ux3eDuOv59Nl+i+ZoBb6XbrMZ3Cp7SJXa72rwgmO in4Xy7SlNXmHEYdKbiwNE9BOcx2qrpEo8DkWpZqAjldXf3XdckyJfQ/8cPZwjsyGQP bA7wu65mVqE0w== Date: Tue, 13 Jan 2026 17:37:13 -0300 From: Arnaldo Carvalho de Melo To: Namhyung Kim Cc: James Clark , Peter Zijlstra , Ingo Molnar , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , Leo Yan , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] perf tools: Dump callchain context marker names Message-ID: References: <20260102-james-perf-dump-callchain-markers-v1-1-3a9bdec20c58@linaro.org> Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: On Fri, Jan 02, 2026 at 02:40:05PM -0800, Namhyung Kim wrote: > Hi James, > > Happy new year! > > On Fri, Jan 02, 2026 at 12:15:43PM +0000, James Clark wrote: > > These are hard to interpret in the raw output because they are printed > > as hex but are defined in perf_event.h as decimal. Make it much easier > > to read the raw callchains by just printing their names. > > > > For example: > > > > $ perf report -D > > > > 1798195372321 0x4638 [0xb0]: PERF_RECORD_SAMPLE(IP, 0x4002): 44922/44922: 0x7c8046dd3400 period: 120218 addr: 0 > > ... FP chain: nr:12 > > ..... 0: fffffffffffffe00 (PERF_CONTEXT_USER) > > ..... 1: 00007c8046dd3400 > > ..... 2: 00007c8046db86d3 > > > > Signed-off-by: James Clark > > --- > > tools/perf/util/session.c | 25 +++++++++++++++++++++++-- > > 1 file changed, 23 insertions(+), 2 deletions(-) > > > > diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c > > index 4236503c8f6c..e812f8954075 100644 > > --- a/tools/perf/util/session.c > > +++ b/tools/perf/util/session.c > > @@ -841,6 +841,26 @@ static void callchain__lbr_callstack_printf(struct perf_sample *sample) > > } > > } > > > > +static const char *callchain_context_str(u64 ip) > > +{ > > + switch (ip) { > > + case PERF_CONTEXT_HV: > > + return " (PERF_CONTEXT_HV)"; > > + case PERF_CONTEXT_KERNEL: > > + return " (PERF_CONTEXT_KERNEL)"; > > + case PERF_CONTEXT_USER: > > + return " (PERF_CONTEXT_USER)"; > > We now have PERF_CONTEXT_USER_DEFERRED too. I ammended the patch with: diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c index e812f89540755f31..65fa9bdff1b8cdf2 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -856,6 +856,8 @@ static const char *callchain_context_str(u64 ip) return " (PERF_CONTEXT_GUEST_KERNEL)"; case PERF_CONTEXT_GUEST_USER: return " (PERF_CONTEXT_GUEST_USER)"; + case PERF_CONTEXT_USER_DEFERRED: + return " (PERF_CONTEXT_USER_DEFERRED)"; default: return ""; } ⬢ [acme@toolbx perf-tools-next]$ And added a note about being Namhyung who made the suggestion, thanks. - Arnaldo