Re: perf: unwind: target platform=x86 not supported was: Re: [PATCH 1/2] perf evsel: Fix probing of precise_ip level for default cycles event

[Jiri Olsa]

On Wed, Jun 14, 2017 at 10:52:42AM -0300, Arnaldo Carvalho de Melo wrote:

SNIP

> 
> And what defines it is...
> 
> tools/perf/util/libunwind/x86_32.c:#define REMOTE_UNWIND_LIBUNWIND
> 
> (and a arm64 file, but lets leave that aside, seems unrelated to this
> case)
> 
> That will get built by...
> 
> tools/perf/util/Build:libperf-$(CONFIG_LIBUNWIND_X86)      += libunwind/x86_32.o
> 
> [acme@jouet linux]$ grep CONFIG_LIBUNWIND_X86 /tmp/build/perf/.config-detected
> [acme@jouet linux]$
> 
> Ingo, are you doing something unusual as building a 32-bit perf to read a
> 62-bit perf.data file?
> 
> Jiri, can you help here? Do you need more info?

hum, looks like local unwind support wasn't compiled in for some reason

Ingo, what's the arch of host and perf data?

thanks,
jirka