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SubjectRE: [PATCH V2 17/19] perf scripts python: exported-sql-viewer.py: Add All branches report
Date
> -----Original Message-----
> From: Arnaldo Carvalho de Melo [mailto:acme@kernel.org]
> Sent: Tuesday, October 23, 2018 10:30 PM
> To: Hunter, Adrian <adrian.hunter@intel.com>
> Cc: Jiri Olsa <jolsa@redhat.com>; Andi Kleen <ak@linux.intel.com>; linux-
> kernel@vger.kernel.org
> Subject: Re: [PATCH V2 17/19] perf scripts python: exported-sql-viewer.py:
> Add All branches report
>
> Em Tue, Oct 23, 2018 at 06:41:17PM +0000, Hunter, Adrian escreveu:
> > > -----Original Message-----
> > > From: Arnaldo Carvalho de Melo [mailto:acme@kernel.org]
> > > Sent: Tuesday, October 23, 2018 9:12 PM
> > > To: Hunter, Adrian <adrian.hunter@intel.com>
> > > Cc: Jiri Olsa <jolsa@redhat.com>; Andi Kleen <ak@linux.intel.com>;
> > > linux- kernel@vger.kernel.org
> > > Subject: Re: [PATCH V2 17/19] perf scripts python: exported-sql-
> viewer.py:
> > > Add All branches report
> > >
> > > Em Tue, Oct 23, 2018 at 10:59:49AM +0300, Adrian Hunter escreveu:
> > > > Add a report to display branches in a similar fashion to perf script.
> > > > The main purpose of this report is to display disassembly,
> > > > however, presently, the only supported disassembler is Intel XED,
> > > > and additionally the object code must be present in perf build ID cache.
> > > >
> > > > To use Intel XED, libxed.so must be present. To build and install
> > > > libxed.so:
> > > > git clone https://github.com/intelxed/mbuild.git mbuild
> > > > git clone https://github.com/intelxed/xed
> > > > cd xed
> > > > ./mfile.py --share
> > > > sudo ./mfile.py --prefix=/usr/local install
> > > > sudo ldconfig
> > > >
> > > > Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
> > > > ---
> > > >
> > > >
> > > > Changes in V2:
> > > >
> > > > Fix branch report not appearing for kernel-only or user-only tracing:
> > > > Find branch events named like "branches:k" or "branches:u" as
> > > > well
> > > as
> > > > just plain "branches", by splitting the name at the colon. i.e.
> > > > event = event.split(":")[0]
> > >
> > > So, I followed the instructions then ended up with:
> > >
> > > [acme@seventh perf]$ find /usr/local -name "*xed*" | head
> > > /usr/local/lib/libxed.so /usr/local/lib/libxed.a
> > > /usr/local/lib/libxed-ild.so /usr/local/lib/libxed-ild.a
> > > /usr/local/include/xed /usr/local/include/xed/xed- syntax-enum.h
> > > /usr/local/include/xed/xed-attributes.h
> > > /usr/local/include/xed/xed-build-defines.h
> > > /usr/local/include/xed/xed-cpuid-rec.h
> > > /usr/local/include/xed/xed-flags.h
> > > [acme@seventh perf]$
> > >
> > > Ran ldconfig as root, etc:
> > >
> > > [acme@seventh perf]$ ldconfig -v -N | grep xed

What about:
ldconfig -p | grep xed

> > > ldconfig: Can't stat /libx32: No such file or directory
> > > ldconfig: Path `/usr/lib' given more than once
> > > ldconfig: Path `/usr/lib64' given more than once
> > > ldconfig: Can't stat /usr/libx32: No such file or directory
> > > [acme@seventh perf]$
> > >
> > > [acme@seventh perf]$ file /usr/local/lib/libxed.so
> > > /usr/local/lib/libxed.so: ELF 64-bit LSB shared object, x86-64,
> > > version 1 (SYSV), dynamically linked,
> > > BuildID[sha1]=09cf45310a731f727b4575582a638052b8f3e3bb, not
> stripped
> > > [acme@seventh perf]$ file /usr/local/lib/libxed-ild.so
> > > /usr/local/lib/libxed-ild.so: ELF 64-bit LSB shared object, x86-64,
> > > version 1 (SYSV), dynamically linked,
> > > BuildID[sha1]=a5601603e305bb7b7f8edc7da0e78acbc9b63eba, not
> stripped
> > > [acme@seventh perf]$
> > >
> > > Tried with:
> > >
> > > export LD_LIBRARY_PATH=/usr/local/lib/
> > >
> > > But so far couldn't get it to show the disassembly.
> > >
> > > The "All Branches" is there, wasn't in v1 of this patch.
> > >
> > > Ideas?
> >
> > The "All Branches" report is a 2-level tree, and the disassembly
> > displays when the next level of the tree is opened i.e. click the arrow at the
> start of the line.
>
> Right, I pressed on those arrows, nothing appeared, do you have any hotkey
> to expand them all at once?

No there isn't, but it would take quite a while because it doesn't disassemble until
it is expanded.

>
> > Have you tried both kernel and user space?
>
> [root@seventh perf]# perf evlist -v
> intel_pt//u: type: 8, size: 112, config: 0x300e601, { sample_period,
> sample_freq }: 1, sample_type: IP|TID|TIME|CPU|IDENTIFIER, read_format:
> ID, disabled: 1, inherit: 1, exclude_kernel: 1, exclude_hv: 1, sample_id_all: 1
> dummy:u: type: 1, size: 112, config: 0x9, { sample_period, sample_freq }: 1,
> sample_type: IP|TID|TIME|CPU|IDENTIFIER, read_format: ID, inherit: 1,
> exclude_kernel: 1, exclude_hv: 1, mmap: 1, comm: 1, task: 1, sample_id_all:
> 1, mmap2: 1, comm_exec: 1, context_switch: 1 [root@seventh perf]#
>
> Good question, it was with that //u, so just userspace, trying removing that
> part.
>
> > The script looks for dsos in the build id cache. The dsos can be
> > viewed by selecting dsos_view from the Tables menu, so you could check if
> that information looks right.
> >
> > Also the script has a variable "have_disassembler", so you could hack the
> script to print that to find out if XED is working.
> >

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