linux-kernel - Re: [PATCH] perf/tool: Fix usage of trace events with '-' in trace system name.

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Message-ID: <534FBE04.9000501@de.ibm.com>
Date:	Thu, 17 Apr 2014 13:41:56 +0200
From:	Christian Borntraeger <borntraeger@...ibm.com>
To:	Jiri Olsa <jolsa@...hat.com>, Paolo Bonzini <pbonzini@...hat.com>
CC:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	KVM <kvm@...r.kernel.org>,
	linux-s390 <linux-s390@...r.kernel.org>,
	Cornelia Huck <cornelia.huck@...ibm.com>,
	linux-kernel@...r.kernel.org,
	Alexander Yarygin <yarygin@...ux.vnet.ibm.com>
Subject: Re: [PATCH] perf/tool: Fix usage of trace events with '-' in trace
 system name.

On 17/04/14 13:32, Jiri Olsa wrote:
> On Tue, Mar 25, 2014 at 11:15:29AM +0100, Paolo Bonzini wrote:
>> Il 24/03/2014 21:49, Christian Borntraeger ha scritto:
>>> event_legacy_tracepoint:
>>> +PE_NAME '-' PE_NAME ':' PE_NAME
>>> +{
>>> +	struct parse_events_evlist *data = _data;
>>> +	struct list_head *list;
>>> +	char sys_name[strlen($1) + strlen($3) + 2];
>>> +	sprintf(&sys_name, "%s-%s", $1, $3);
>>> +
>>> +	ALLOC_LIST(list);
>>> +	ABORT_ON(parse_events_add_tracepoint(list, &data->idx, &sys_name, $5));
>>> +	$$ = list;
>>> +}
>>
>> Why isn't '-' part of PE_NAME?
> 
> hi Paolo ;-)
> 
> because it screws cache events parsing.. we need some code factoring
> in this part
> 
> Acked-by: Jiri Olsa <jolsa@...hat.com>

Jiri,

can you handle this patch + "perf-kvm: fix of 'Min time' counting in report command" in your tree?

> 
> it'd be nice to add test to tests/parse-events.c, probably s390 specific,
> because the parsing code touches the tracepoint format file

Alexander,

can you have a look to provide a simple test for perf that checks that trace events like kvm-s390 are handled properly?

Thanks

Christian

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