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 9B26B22F772; Fri, 2 Jan 2026 22:40:07 +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=1767393607; cv=none; b=d5Kqh0zCzeiwy+5tcRpoqpTL6EQpN8BBVXSnmY06vbwwBzZKzVI0RoIH3j4d7CgqMN/KNJ3OSKGwH5a+8J1cA/eYgecuExZS9iaCuhFIU65yg7VRiuAIgiEtH4NGeJhstCJK4zcY/a1jk9wX6fJAAaQgH9H5eBtYgZvzW09s/zA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767393607; c=relaxed/simple; bh=u2sBzbUtQ52TAIVixNJyjTXZ4doXDV44CBYUI02UpS0=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=V0GIs5KGjdoS0UyYQ+OaVpYng/zgoKUyP4120uPN0xfg8VJwAUR0lWWXiDygx2VZQtJMVyjOAVI8XJ6aNgEGlOUjChxr0hoUypnBI5buvLu8oYJP7+5Wz+cb0i8igtQuRSCF1OevHx2dVKKzkDXLwICfyrS93/mRyB7rJi4AE4A= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=hxwptyRl; 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="hxwptyRl" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8E96CC116B1; Fri, 2 Jan 2026 22:40:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1767393607; bh=u2sBzbUtQ52TAIVixNJyjTXZ4doXDV44CBYUI02UpS0=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=hxwptyRlqOilA+7ZQgpbMzaWtdwKTZP3MB2sXq9XO0QxXj5ZzoTe83WGBSxYz0Yaj PW47boH91GDqNZKenbkTriPmILAUjQDI1pi8u15rJ3YIN8TophAfp6xDz3ebM1jocx BWVn7QtE/kCvn6QwbC7hny8MK0W2jeNBdgKU0kiYpa2xBLYaq2CNgZEGNeiVq+wTjb +RWTbfGpmCUqhz7zxgEgt4ddklcQ7XVu2fQucs9YHiN3hU3E0iCwP8n5+wRmngg5+x pelaOM7QGH3B517vLaJc0PDMhs3wSgdEtQF1Nfyh1ZxwaSeIfM71BnkcHI8sjvK5EF N4MsBKkh1zclg== Date: Fri, 2 Jan 2026 14:40:05 -0800 From: Namhyung Kim To: James Clark Cc: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , 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-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20260102-james-perf-dump-callchain-markers-v1-1-3a9bdec20c58@linaro.org> 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. Thanks, Namhyung > + case PERF_CONTEXT_GUEST: > + return " (PERF_CONTEXT_GUEST)"; > + case PERF_CONTEXT_GUEST_KERNEL: > + return " (PERF_CONTEXT_GUEST_KERNEL)"; > + case PERF_CONTEXT_GUEST_USER: > + return " (PERF_CONTEXT_GUEST_USER)"; > + default: > + return ""; > + } > +} > + > static void callchain__printf(struct evsel *evsel, > struct perf_sample *sample) > { > @@ -853,8 +873,9 @@ static void callchain__printf(struct evsel *evsel, > printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr); > > for (i = 0; i < callchain->nr; i++) > - printf("..... %2d: %016" PRIx64 "\n", > - i, callchain->ips[i]); > + printf("..... %2d: %016" PRIx64 "%s\n", > + i, callchain->ips[i], > + callchain_context_str(callchain->ips[i])); > > if (sample->deferred_callchain) > printf("...... (deferred)\n"); > > --- > base-commit: cbd41c6d4c26c161a2b0e70ad411d3885ff13507 > change-id: 20260102-james-perf-dump-callchain-markers-64d175b108c8 > > Best regards, > -- > James Clark >