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

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Message-ID: <20140417113221.GA7422@krava.brq.redhat.com>
Date:	Thu, 17 Apr 2014 13:32:21 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Paolo Bonzini <pbonzini@...hat.com>
Cc:	Christian Borntraeger <borntraeger@...ibm.com>,
	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 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>

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

thanks,
jirka
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