From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org>
X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on
	aws-us-west-2-korg-lkml-1.web.codeaurora.org
Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117])
	(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
	(No client certificate requested)
	by smtp.lore.kernel.org (Postfix) with ESMTPS id 68A7EC433FE
	for <linuxppc-dev@archiver.kernel.org>; Sat,  8 Oct 2022 19:41:10 +0000 (UTC)
Received: from boromir.ozlabs.org (localhost [IPv6:::1])
	by lists.ozlabs.org (Postfix) with ESMTP id 4MlFsc6YVjz3dst
	for <linuxppc-dev@archiver.kernel.org>; Sun,  9 Oct 2022 06:41:08 +1100 (AEDT)
Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=kernel.org (client-ip=2604:1380:4601:e00::1; helo=ams.source.kernel.org; envelope-from=srs0=vz7s=2j=goodmis.org=rostedt@kernel.org; receiver=<UNKNOWN>)
Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1])
	(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
	(No client certificate requested)
	by lists.ozlabs.org (Postfix) with ESMTPS id 4MlFs26VQyz3000
	for <linuxppc-dev@lists.ozlabs.org>; Sun,  9 Oct 2022 06:40:38 +1100 (AEDT)
Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140])
	(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
	(No client certificate requested)
	by ams.source.kernel.org (Postfix) with ESMTPS id E09E3B80BD9;
	Sat,  8 Oct 2022 19:40:34 +0000 (UTC)
Received: by smtp.kernel.org (Postfix) with ESMTPSA id 63B91C433D6;
	Sat,  8 Oct 2022 19:40:20 +0000 (UTC)
Date: Sat, 8 Oct 2022 15:40:16 -0400
From: Steven Rostedt <rostedt@goodmis.org>
To: Marcelo Tosatti <mtosatti@redhat.com>
Subject: Re: [RFC PATCH 0/5] Generic IPI sending tracepoint
Message-ID: <20221008154016.0f7ecd8f@rorschach.local.home>
In-Reply-To: <Y0CFnWDpMNGajIRD@fuller.cnet>
References: <20221007154145.1877054-1-vschneid@redhat.com>
	<Y0CFnWDpMNGajIRD@fuller.cnet>
X-Mailer: Claws Mail 3.17.8 (GTK+ 2.24.33; x86_64-pc-linux-gnu)
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
X-BeenThere: linuxppc-dev@lists.ozlabs.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Linux on PowerPC Developers Mail List <linuxppc-dev.lists.ozlabs.org>
List-Unsubscribe: <https://lists.ozlabs.org/options/linuxppc-dev>,
 <mailto:linuxppc-dev-request@lists.ozlabs.org?subject=unsubscribe>
List-Archive: <http://lists.ozlabs.org/pipermail/linuxppc-dev/>
List-Post: <mailto:linuxppc-dev@lists.ozlabs.org>
List-Help: <mailto:linuxppc-dev-request@lists.ozlabs.org?subject=help>
List-Subscribe: <https://lists.ozlabs.org/listinfo/linuxppc-dev>,
 <mailto:linuxppc-dev-request@lists.ozlabs.org?subject=subscribe>
Cc: Juri Lelli <juri.lelli@redhat.com>, Mark Rutland <mark.rutland@arm.com>, linux-ia64@vger.kernel.org, linux-sh@vger.kernel.org, Peter Zijlstra <peterz@infradead.org>, Sebastian Andrzej Siewior <bigeasy@linutronix.de>, Dave Hansen <dave.hansen@linux.intel.com>, linux-mips@vger.kernel.org, Guo Ren <guoren@kernel.org>, "H. Peter Anvin" <hpa@zytor.com>, sparclinux@vger.kernel.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, Valentin Schneider <vschneid@redhat.com>, Marc Zyngier <maz@kernel.org>, linux-hexagon@vger.kernel.org, x86@kernel.org, Russell King <linux@armlinux.org.uk>, linux-csky@vger.kernel.org, Ingo Molnar <mingo@redhat.com>, linux-snps-arc@lists.infradead.org, linux-xtensa@linux-xtensa.org, "Paul E. McKenney" <paulmck@kernel.org>, Frederic Weisbecker <frederic@kernel.org>, Nicholas Piggin <npiggin@gmail.com>, openrisc@lists.librecores.org, Borislav Petkov <bp@alien8.de>, loongarch@lists.linux.dev, Thomas Gleixner <tglx@linutronix.de>, linux-arm-kernel@lis
 ts.infradead.org, linux-parisc@vger.kernel.org, Daniel Bristot de Oliveira <bristot@redhat.com>, linux-kernel@vger.kernel.org, linux-alpha@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, "David S.
 Miller" <davem@davemloft.net>
Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org
Sender: "Linuxppc-dev" <linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org>

On Fri, 7 Oct 2022 17:01:33 -0300
Marcelo Tosatti <mtosatti@redhat.com> wrote:

> > As for the targeted CPUs, the existing tracepoint does export them, albeit in
> > cpumask form, which is quite inconvenient from a tooling perspective. For
> > instance, as far as I'm aware, it's not possible to do event filtering on a
> > cpumask via trace-cmd.  
> 
> https://man7.org/linux/man-pages/man1/trace-cmd-set.1.html
> 
>        -f filter
>            Specify a filter for the previous event. This must come after
>            a -e. This will filter what events get recorded based on the
>            content of the event. Filtering is passed to the kernel
>            directly so what filtering is allowed may depend on what
>            version of the kernel you have. Basically, it will let you
>            use C notation to check if an event should be processed or
>            not.
> 
>                ==, >=, <=, >, <, &, |, && and ||
> 
>            The above are usually safe to use to compare fields.

We could always add an "isset(x)" filter ;-)

-- Steve