From: Ian Rogers <irogers@google.com>
To: Andi Kleen <ak@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
Kan Liang <kan.liang@linux.intel.com>,
Haiyan Song <haiyanx.song@intel.com>,
Jin Yao <yao.jin@linux.intel.com>,
Ravi Bangoria <ravi.bangoria@linux.ibm.com>,
John Garry <john.garry@huawei.com>, Leo Yan <leo.yan@linaro.org>,
Adrian Hunter <adrian.hunter@intel.com>,
LKML <linux-kernel@vger.kernel.org>,
linux-perf-users <linux-perf-users@vger.kernel.org>,
Stephane Eranian <eranian@google.com>
Subject: Re: [PATCH 2/8] perf metrics: fix parse errors in cascade lake metrics
Date: Wed, 22 Apr 2020 08:34:02 -0700 [thread overview]
Message-ID: <CAP-5=fUnWAycQehCJ9=btquV2c3DVDX+tTEc85H8py9Kfehq4w@mail.gmail.com> (raw)
In-Reply-To: <20200422143840.GJ608746@tassilo.jf.intel.com>
On Wed, Apr 22, 2020 at 7:38 AM Andi Kleen <ak@linux.intel.com> wrote:
>
> On Wed, Apr 22, 2020 at 12:48:03AM -0700, Ian Rogers wrote:
> > Remove over escaping with \\.
> > Remove extraneous if 1 if 0 == 1 else 0 else 0.
>
> So where do these parse errors happen exactly? Some earlier
> patches introduced them as regressions?
I'll work to track down a Fixes tag. I can repro the Skylakex errors
without the test in this series, by doing:
$ perf stat -M DRAM_Read_Latency sleep 1
Error:
The sys_perf_event_open() syscall returned with 22 (Invalid argument)
for event (cha/event=0x36\,uma
sk=0x21/).
/bin/dmesg | grep -i perf may provide additional information.
This was just the escaping issue. I'm less clear on the other cascade
lake issue, and it is a bit more work for me to test on cascade lake.
What is "if 1 if 0 == 1 else 0 else 0" trying to do? Perhaps hunting
for the Fixes will let me know, but it looks like a copy-paste error.
> The original metrics worked without parse errors as far as I know.
The skylake issue above repros on 5.2.17 and so it seems like it is
broken for a while. The test in this series will prevent this in the
future, but without this patch that test fails.
> If it fixes something earlier it would need Fixes: tags.
Working on it. Thanks for the input!
Ian
> -Andi
next prev parent reply other threads:[~2020-04-22 15:34 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-22 7:48 [PATCH 0/8] perf metric fixes and test Ian Rogers
2020-04-22 7:48 ` [PATCH 1/8] perf expr: unlimited escaped characters in a symbol Ian Rogers
2020-04-22 7:48 ` [PATCH 2/8] perf metrics: fix parse errors in cascade lake metrics Ian Rogers
2020-04-22 14:38 ` Andi Kleen
2020-04-22 15:34 ` Ian Rogers [this message]
2020-04-22 16:18 ` Ian Rogers
2020-04-23 1:08 ` Jin, Yao
2020-04-23 5:53 ` Jin, Yao
2020-04-23 6:09 ` Ian Rogers
2020-04-23 7:51 ` Jin, Yao
2020-04-23 10:10 ` Jiri Olsa
2020-04-23 10:11 ` Jiri Olsa
2020-04-23 14:34 ` Ian Rogers
2020-04-22 7:48 ` [PATCH 3/8] perf metrics: fix parse errors in skylake metrics Ian Rogers
2020-04-22 7:48 ` [PATCH 4/8] perf expr: allow ',' to be an other token Ian Rogers
2020-04-22 7:48 ` [PATCH 5/8] perf expr: increase max other Ian Rogers
2020-04-22 7:48 ` [PATCH 6/8] perf expr: parse numbers as doubles Ian Rogers
2020-04-22 7:48 ` [PATCH 7/8] perf expr: debug lex if debugging yaxx Ian Rogers
2020-04-22 7:48 ` [PATCH 8/8] perf test: add expr test for pmu metrics Ian Rogers
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