[llvm-dev] llvm-exegesis

Simon Pilgrim via llvm-dev
Tue, 14 Aug 2018 19:19:27 -0000

Hi Luka,

Which CPU and OS are you running? Most linux distros seem to have an old
version of libpfm - I've had more luck (better CPU support) by using the
trunk version from
https://sourceforge.net/p/perfmon2/libpfm4/ci/master/tree/

Also, are running the tool with sudo?

Simon.

On 14/08/2018 16:28, Luka Ercegovcevic via llvm-dev
wrote:
> Hi everyone,
>
> Can someone help me with running llvm-exegesis tool on x86_64? I saw
> that I need libpfm library, but I'm still getting segmentation fault
> when I try to run the tool. Is there anything else I need to do (build
> llvm on some specific way) ?
> This is how I tried to run this tool: llvm-exegesis -mode=latency
> -opcode-name=ADD64rr
>
> Thanks,
> Luka
>
>
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