From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) (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 C00CF2D4B40 for ; Fri, 31 Oct 2025 15:44:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=216.40.44.11 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761925498; cv=none; b=H+xR7RN3PmshYPFdcSPx9SlQIXM9ip38rVn7z4ip0Yikf9i09ywQRWQga+QE0nNA//bph6BQ1GRR2GoCg+c0o51HPf3afuPKTVD5w+IeU5pvRjfLyL+91Cn60IjYXOMe2YRx2Loj8IojvHmeYvE3sIFRZxPSfjAh2i1Y4gJUcY4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761925498; c=relaxed/simple; bh=DvrvPdCvNlHzVung0tVXT/Tl+IQ+bY4z0cCRnefKY+E=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=ZEwd25EnthEwmBwUYLnwDuX+kw3jGMVbtb58exASyVb6OTwMikNU1JyuHrLD7o6MqvH2ZTq+fB9pM9vNKd7yEwK/eW2ZuFqAofEa6APx0TwNtj83WxP+FlLN7s5wwvUL0wMS7dH3vuXkMxfH3NnHlzb+JIBTvFph4Ab2M3fjG+E= 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=216.40.44.11 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 omf16.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay03.hostedemail.com (Postfix) with ESMTP id 2C3ABB9EFD; Fri, 31 Oct 2025 15:44:49 +0000 (UTC) Received: from [HIDDEN] (Authenticated sender: rostedt@goodmis.org) by omf16.hostedemail.com (Postfix) with ESMTPA id B99742000E; Fri, 31 Oct 2025 15:44:47 +0000 (UTC) Date: Fri, 31 Oct 2025 11:45:32 -0400 From: Steven Rostedt To: Jorge Merlino Cc: linux-trace-users@vger.kernel.org Subject: Re: Kernelshark latency field Message-ID: <20251031114532.37f30c8a@gandalf.local.home> In-Reply-To: References: X-Mailer: Claws Mail 3.20.0git84 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Precedence: bulk X-Mailing-List: linux-trace-users@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: eemb9tdzso74xcuwjk5e6nckxxy67oxe X-Rspamd-Server: rspamout01 X-Rspamd-Queue-Id: B99742000E X-Session-Marker: 726F737465647440676F6F646D69732E6F7267 X-Session-ID: U2FsdGVkX18ZqnZW+SOU1mKkv5fcceEpe5Ma8ffjD1E= X-HE-Tag: 1761925487-646980 X-HE-Meta: U2FsdGVkX193dud8TRaTqQjsYyPx1QuN9jzwFFKxc/RFVM411X8QYbKS1UtNTjPqLw8WdjdDel8mX4S05ElF9pBDM9NJaPvTX5ICozB5D7DFn7FZwLvDjXSEOpLBepdIhUxVKAxKHG2iOvc+kgfXYMzGtYVu6O4TJKYkchXEATvu+fOyJj1thMuGEl8W4aTD9VWvsDL0ZPERgZlH0PA5kAqJjo7TXDhpUij3JoN6mguJdLRdkPxrw7ofub+Vwk39V7EQenSPHvFejW29Tz3TccwWh6BBpVoYxIouKAURwqcEljPsOYFtNb7Vdqbfst8LDuK5jdPa/VzLxT/psZXGR3SqCbQDWhMT3cyOONOSqcXJHZbALFYiHMBxoIns+M5E On Fri, 31 Oct 2025 11:52:59 -0300 Jorge Merlino wrote: > Hi folks, > > I've been using kernelshark 2.2.1 and have noticed that the latency > field on the grid has five chars in it. The documentation [1] only > mention 4 fields. Anyone knows what the fifth is for? Ah thanks for letting us know. I should update the documentation. The fifth field is "migration disabled counter". It still allows the task to be preempted by another task, but it will temporarily pin that task to the CPU. It's a new feature to the Linux kernel and was introduced in 5.11. -- Steve