linux-kernel - Re: [PATCH 2/2] perf test: Suppress libtraceevent warnings

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Date:	Mon, 19 Oct 2015 10:09:26 -0600
From:	David Ahern <dsahern@...il.com>
To:	Namhyung Kim <namhyung@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Jiri Olsa <jolsa@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Wang Nan <wangnan0@...wei.com>
Subject: Re: [PATCH 2/2] perf test: Suppress libtraceevent warnings

On 10/19/15 9:23 AM, Namhyung Kim wrote:
> Currently libtraceevent emits warning on unsupported event formats.
> However it'd be better to see them only -v option is given.  To do that,
> it needs to override the warning() function which is used in the
> libtracevent.  Thus add set_warning_routine() same as set_die_routine()
> and check the verbose flag in our warning routine.
>
> Before:
>    # perf test 5
>     5: parse events tests                                       :
>      Warning: [kvmmmu:kvm_mmu_get_page] bad op token {
>      Warning: [kvmmmu:kvm_mmu_sync_page] bad op token {
>      Warning: [kvmmmu:kvm_mmu_unsync_page] bad op token {
>      Warning: [kvmmmu:kvm_mmu_prepare_zap_page] bad op token {
>      Warning: [kvmmmu:fast_page_fault] function is_writable_pte not defined
>      ...
>     Ok
>
> After:
>    # perf test 5
>     5: parse events tests                                       : Ok
>
> Signed-off-by: Namhyung Kim <namhyung@...nel.org>
> ---
>   tools/perf/tests/parse-events.c | 14 ++++++++++++++
>   tools/perf/util/usage.c         |  5 +++++
>   tools/perf/util/util.h          |  1 +
>   3 files changed, 20 insertions(+)
>

Acked-by: David Ahern <dsahern@...il.com>


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