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<p class="MsoNormal"><span style="font-family:"Book Antiqua",serif;mso-fareast-language:EN-US">Thanks. Yes, I build ‘clang’ and all the other tools and utilities together, so I am surprised that ‘clang’ would have ‘zlib’ enabled but not ‘llvm-profdata’. I
will get back to this when I return on Monday, and I have a suspicion I may be doing something else wrong that I will formulate and ask next week.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Book Antiqua",serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Book Antiqua",serif;mso-fareast-language:EN-US">Thanks for your help,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Book Antiqua",serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Book Antiqua",serif;mso-fareast-language:EN-US"> MartinO<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Book Antiqua",serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><a name="_____replyseparator"></a><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> llvm-dev [mailto:llvm-dev-bounces@lists.llvm.org]
<b>On Behalf Of </b>Xinliang David Li via llvm-dev<br>
<b>Sent:</b> Tuesday, July 18, 2017 10:41 PM<br>
<b>To:</b> Martin J. O'Riordan <MartinO@theheart.ie><br>
<b>Cc:</b> LLVM Developers <llvm-dev@lists.llvm.org><br>
<b>Subject:</b> Re: [llvm-dev] PGO, zlib and 'default.profraw'<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">set LLVM_ENABLE_ZLIB=ON with cmake invocation. zlib should be installed and zlib.h header file needs to be in the header search path.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Is your llvm-profdata tool built together with clang? <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">David<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Tue, Jul 18, 2017 at 1:04 PM, Martin J. O'Riordan via llvm-dev <<a href="mailto:llvm-dev@lists.llvm.org" target="_blank">llvm-dev@lists.llvm.org</a>> wrote:<o:p></o:p></p>
<blockquote style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm">
<p class="MsoNormal" style="margin-bottom:12.0pt">How can I build the profile reader with ZLIB support enabled? I configure and build all the tools together with 'clang', so I would have expected that all or none support ZLIB, or is this a cross-compiler configuration
specific issue?<br>
<br>
Thanks,<br>
<br>
MartinO<br>
<br>
<span class="im">-----Original Message-----</span><br>
<span class="im">From: llvm-dev [mailto:<a href="mailto:llvm-dev-bounces@lists.llvm.org">llvm-dev-bounces@lists.llvm.org</a>] On Behalf Of Justin Bogner via llvm-dev</span><br>
<span class="im">Sent: 18 July 2017 19:37</span><br>
<span class="im">To: Xinliang David Li via llvm-dev <<a href="mailto:llvm-dev@lists.llvm.org">llvm-dev@lists.llvm.org</a>></span><br>
<span class="im">Subject: Re: [llvm-dev] PGO, zlib and 'default.profraw'</span><o:p></o:p></p>
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<p class="MsoNormal">Can we improve the error message here? We should be able to check zlib::isAvailable and give an error like "profile uses zlib compression but the profile reader was built without zlib support" or so in this case.<br>
<br>
Xinliang David Li via llvm-dev <<a href="mailto:llvm-dev@lists.llvm.org">llvm-dev@lists.llvm.org</a>> writes:<br>
> The __llvm_prf_names section is compressed but your llvm-profdata tool<br>
> is probably not built with zlib enabled.<br>
><br>
> To disable compression, use option -mllvm<br>
> -enable-name-compression=false in your instrumentation build.<br>
><br>
> David<br>
><br>
> On Tue, Jul 18, 2017 at 7:05 AM, ORiordan, Martin via llvm-dev <<br>
> <a href="mailto:llvm-dev@lists.llvm.org">llvm-dev@lists.llvm.org</a>> wrote:<br>
><br>
>> We are trying to get PGO working for our embedded out-of-tree target,<br>
>> but the utility ‘llvm-profdata’ does not like the data we are giving it.<br>
>><br>
>><br>
>><br>
>> Because this is not a hosted environment, we have to off-chip the<br>
>> profiling data ourselves, and although the data looks okay, ‘llvm-profdata’<br>
>> reports the following error:<br>
>><br>
>><br>
>><br>
>> *llvm-profdata show -all-functions -counts -detailed-summary -text<br>
>> -static-func-full-module-prefix ~/Downloads/default.profraw*<br>
>><br>
>> error: ~/Downloads/default.profraw: Failed to uncompress data (zlib)<br>
>><br>
>><br>
>><br>
>> But even for a hosted system, it is not clear to me where ‘zlib’ gets<br>
>> involved in compressing the data. The start of our data looks like:<br>
>><br>
>><br>
>><br>
>> *hexdump -C default.profraw*<br>
>><br>
>> 00000000 81 52 66 6f 72 70 6c ff 04 00 00 00 00 00 00<br>
>><br>
>> 00 |.Rforpl.........|<br>
>><br>
>> 00000010 3c 00 00 00 00 00 00 00 28 01 00 00 00 00 00<br>
>><br>
>> 00 |<.......(.......|<br>
>><br>
>><br>
>><br>
>> Which looks valid for Little-Endian, 32-bit and LLVM v4.0.<br>
>><br>
>><br>
>><br>
>> What do we need to do to prepare this raw data from the device into<br>
>> the form that ‘llvm-profdata’ needs to see?<br>
>><br>
>><br>
>><br>
>> Thanks,<br>
>><br>
>><br>
>><br>
>> MartinO<br>
>><br>
>><br>
>><br>
>><br>
>><br>
>> --------------------------------------------------------------<br>
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