From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6525A210F59; Wed, 24 Dec 2025 13:57:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=216.40.44.13 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766584623; cv=none; b=m/8cp7s2LrO19dT0bmETBRqPD94IyoGbbw8tSl2tIw82QE+FQDTg+S/XfYCWZwcmJTU/4A/rFtI+LNUNWOBICL0ehypmCmRUYBJumOLS3ESssIwjqpKmtH+ZJjNpDu8hkRG56WJ0eMyRoU19dPwAYI4O3RiZwIllA9iNgw+e9gA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766584623; c=relaxed/simple; bh=P5j0i6s/vrGxTKQ57QoRqhQoHhV+ZYwLN2pgsxumXso=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=iCzh8jay98cTYEoeX6qsqwrE3T6Bt4n0cb3dFGFkgNQC5fa3BwJksboF/ageAvROEWA6U+36iz4irKU+eOstXJrndW5GVG3j0cOsuD506gaE4HVor4VqVEWLXzUR44qMizehoQDzg8gDZyG3Gk9jxxNutOBaxSvop4543QSWZuk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=goodmis.org; spf=pass smtp.mailfrom=goodmis.org; arc=none smtp.client-ip=216.40.44.13 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=goodmis.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=goodmis.org Received: from omf07.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay02.hostedemail.com (Postfix) with ESMTP id CB34013A027; Wed, 24 Dec 2025 13:56:58 +0000 (UTC) Received: from [HIDDEN] (Authenticated sender: rostedt@goodmis.org) by omf07.hostedemail.com (Postfix) with ESMTPA id BDD702002C; Wed, 24 Dec 2025 13:56:56 +0000 (UTC) Date: Wed, 24 Dec 2025 08:58:48 -0500 From: Steven Rostedt To: Aaron Tomlin Cc: mhiramat@kernel.org, mark.rutland@arm.com, mathieu.desnoyers@efficios.com, corbet@lwn.net, sean@ashe.io, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-doc@vger.kernel.org Subject: Re: [PATCH] tracing: Add bitmask-list option for human-readable bitmask display Message-ID: <20251224085848.26387f5d@gandalf.local.home> In-Reply-To: References: <20251223035622.2084081-1-atomlin@atomlin.com> <20251223133452.416fd539@gandalf.local.home> X-Mailer: Claws Mail 3.20.0git84 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Stat-Signature: iwi3dwfdj7qdog1nrdefebtty3un17oc X-Rspamd-Server: rspamout04 X-Rspamd-Queue-Id: BDD702002C X-Session-Marker: 726F737465647440676F6F646D69732E6F7267 X-Session-ID: U2FsdGVkX18J1jOSJEdCnaM9i/Mt9zDui8U5+81LWA8= X-HE-Tag: 1766584616-534642 X-HE-Meta: U2FsdGVkX19atAjIg4EP1J1pjNKeQk5DQ1h+CyVupk8LgRurxol/G3UlrH6QmVVKxZ6qnhUHjbxBHnIdM7p+jR3Lj5A2Iqr84bsvxTFVm8ODaYgmvLjtr93euim9Pf3xFSD5xvJZJRDNZGzYlk49K/86bFcyRyP48eSBnl9tyaH6ZH6tS4GXtvVE2hwCdKFtLiRqODILyuQ0xYgxI5gLpMG3w+6RQGebWuiFQ8dJWhrQlIGWb6ddaG0gBVZNj+ypn+6fMtbNGTto1feD0rl6vPQ6zhbAvLR0UMaTjYSbs14PP6HM+WlNzSVo4C2LI4oRalPmsEZjzcH+zNco1Pn7WPx8in7dpTv/6ie49GUy0AoV62jOxCZVnjg3/CwUrIcM On Tue, 23 Dec 2025 17:14:35 -0500 Aaron Tomlin wrote: > When dealing with 128+ logical cores, interpreting a raw hexadecimal bitmap > to identify targeted CPUs is mentally taxing and prone to error. For > example, if I am investigating why CPU 6 is being interrupted, I might use > a filter such as "cpumask & CPU{6}". Seeing the resulting output as a range > list (e.g., 0-7) rather than a hexadecimal bitmask allows one to deduce > almost instantly which cluster of CPUs is involved in the IPI broadcast. Should we just make all cpu bitmask range lists instead? -- Steve