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<p style="margin-top:0;margin-bottom:0"><span>"The caveat is, while the tool (llvm-xray convert) can generate arbitrarily large Chrome-loadable traces, the Chrome trace viewer can only handle so much data."</span></p>
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<p style="margin-top:0;margin-bottom:0"><span>A tool like Trace Compass could help here, it does scale pretty well. (see
</span><a href="http://tracecompass.org/" class="OWAAutoLink" id="LPlnk938183" previewremoved="true"><span></span>tracecompass.org</a>)</p>
<p style="margin-top:0;margin-bottom:0">I'm replying here so a colleague who just suscribed to the mailing list can reply here.</p>
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<p style="margin-top:0;margin-bottom:0">Marc-André<br>
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<div id="divRplyFwdMsg" dir="ltr"><font style="font-size:11pt" face="Calibri, sans-serif" color="#000000"><b>From:</b> cfe-dev <cfe-dev-bounces@lists.llvm.org> on behalf of Dean Michael Berris via cfe-dev <cfe-dev@lists.llvm.org><br>
<b>Sent:</b> Tuesday, December 5, 2017 3:52 PM<br>
<b>To:</b> Brian Cain<br>
<b>Cc:</b> LLVM Developers; Keith Wyss; Clang Dev<br>
<b>Subject:</b> Re: [cfe-dev] XRay Trace of Clang, Loadable through Chrome Trace Viewer</font>
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<div id="x_AppleMailSignature">Sent from my iPhone</div>
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On 6 Dec 2017, at 4:17 am, Brian Cain <<a href="mailto:brian.cain@gmail.com">brian.cain@gmail.com</a>> wrote:<br>
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<div class="x_gmail_quote">On Tue, Dec 5, 2017 at 9:49 AM, Dean Michael Berris via cfe-dev
<span dir="ltr"><<a href="mailto:cfe-dev@lists.llvm.org" target="_blank">cfe-dev@lists.llvm.org</a>></span> wrote:<br>
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Hi cfe-dev@ and llvm-dev@,<br>
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I've attached a Chrome trace-viewer readable trace of a clang built with XRay instrumentation (additional build/link flags="-fxray-instrument -fxray-instruction-threshold=<wbr>75") with the latest "top-of-trunk" version of clang with the recent updates to the
XRay runtime supporting record filtering.<br>
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To load the attached file, go to 'chrome://tracing' in your Chrome/Chromium browser and load the .gz file directly. Pressing '?' should give a help dialog.<br>
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<div>This is an interesting feature. Is it designed to accept arbitrary xray trace logs or only ones for/from Chrome/ium?</div>
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Yes, it works on any XRay trace generated with the logging implementations that come with XRay in compiler-rt.
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<div>The example attached was of an instrumented Clang binary compiling C++ code. 😁</div>
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<div>The caveat is, while the tool (llvm-xray convert) can generate arbitrarily large Chrome-loadable traces, the Chrome trace viewer can only handle so much data.</div>
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<div>Cheers</div>
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