linux-kernel - Re: [BUG] Junk output from perf test

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Date:	Mon, 7 Oct 2013 09:21:24 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Ramkumar Ramachandra <artagnon@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Ingo Molnar <mingo@...nel.org>,
	Adrian Hunter <adrian.hunter@...el.com>
Subject: Re: [BUG] Junk output from perf test

On Mon, Oct 07, 2013 at 11:47:13AM +0530, Ramkumar Ramachandra wrote:
> Hi,
> 
> `perf test` doesn't give me a clean run; it seems to be out-of-date. I
> spent many hours on tracing "parse events tests" with gdb, but
> preprocessor macros and other complexity make my job very difficult. I
> haven't determined where the warnings in #5 are coming from exactly,
> but it seems to be the codepath starting from test__all_tracepoints().
> Before I spend more hours debugging this, I want to make sure that I'm
> not wasting my time; can you reproduce this?

heya,
yep.. some of them are known to be broken, for some you'd
need the very last kernel to work properly, let's see..

> 
> Thanks.
> 
> -- 8< --
> $ perf test
>  1: vmlinux symtab matches kallsyms                        : FAILED!
>  2: detect open syscall event                              : Ok
>  3: detect open syscall event on all cpus                  : Ok
>  4: read samples using the mmap interface                  : Ok
>  5: parse events tests                                     :  Warning:
> bad op token {
>   Warning: bad op token {
>   Warning: bad op token {
>   Warning: bad op token {
>   Warning: function is_writable_pte not defined
>   Warning: function jiffies_to_msecs not defined
>   Warning: function jiffies_to_msecs not defined
>   Warning: function scsi_trace_parse_cdb not defined
>   Warning: function scsi_trace_parse_cdb not defined
>   Warning: function scsi_trace_parse_cdb not defined
>   Warning: function scsi_trace_parse_cdb not defined
>   Warning: unknown op '{'
>   Warning: unknown op '{'
>   Warning: function xen_hypercall_name not defined
>   Warning: function xen_hypercall_name not defined
>   Warning: function sizeof not defined
>   Warning: function sizeof not defined
>   Warning: function sizeof not defined
>   Warning: function sizeof not defined
>   Warning: function sizeof not defined
>   Warning: function sizeof not defined
>   Warning: function sizeof not defined
>   Warning: function sizeof not defined
>   Warning: function sizeof not defined
>  Ok

this one is libtracevent issue, and is fixed by adding
plugins support posted in here:
  http://marc.info/?l=linux-kernel&m=137803257921043&w=2

I need to update and repost it..


>  6: x86 rdpmc test                                         : Ok
>  7: Validate PERF_RECORD_* events & perf_sample fields     : Ok
>  8: Test perf pmu format parsing                           : Ok
>  9: Test dso data interface                                : Ok
> 10: roundtrip evsel->name check                            : Ok
> 11: Check parsing of sched tracepoints fields              : Ok
> 12: Generate and check syscalls:sys_enter_open event fields: Ok
> 13: struct perf_event_attr setup                           : Ok
> 14: Test matching and linking multiple hists               : Ok
> 15: Try 'use perf' in python, checking link problems       : Ok
> 16: Test breakpoint overflow signal handler                : Ok
> 17: Test breakpoint overflow sampling                      : Ok
> 18: Test number of exit event of a simple workload         : Ok
> 19: Test software clock events have valid period values    : Ok
> 20: Test converting perf time to TSC                       : (not supported) Ok
> 21: Test object code reading                               :[btrfs]
> with build id 97dc0c1d4aab8c3aba31c776c8c6137ccce5428a not found,
> continuing without symbols
>  FAILED!

not sure why those failed.. Adrian?

> 22: Test sample parsing                                    : Ok
> 23: Test using a dummy software event to keep tracking     : (not supported) Ok

I think you need latest kernel for this one

thanks,
jirka
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