From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) (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 D9E492D595A; Tue, 18 Nov 2025 13:53:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=216.40.44.10 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763473984; cv=none; b=hKvsTgR5SjiaxO4NwXv/ZyW18yd1ccAN3fP5fM+YNaiTKdNFXpn8PhT8E4NSIrqoXhwkHW0sR5AcZE3Ipa4bc5QBZThX+ztBelum4Y/eBJbjRBT54A0wEFfQUsWKPuf0kB342eFUzgDVg/O3bs8mVRMCG1ZZqnUst+vZjE+NJNo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763473984; c=relaxed/simple; bh=ogLbbCW+wzR8Ke7FfdDpbk3pauCtGOWvIdtmorVKo6E=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=cZW/X9EuAYn6B+cCzWhO4N6p9KLR667XxWRiOiZLV2b9G15WJPyKLLpC7QGc/ekM7VYk7vkuvW+hG7SOOKgwHgAQvDmszUcpxKmkKofDN1zmDOaTCtA30qcbpSUa8yYGqdafACYQT6cMHLHV8Tf/tg6FRSS6CQvRUsQl8ndButE= 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=216.40.44.10 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 omf20.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay05.hostedemail.com (Postfix) with ESMTP id 677C758895; Tue, 18 Nov 2025 13:53:00 +0000 (UTC) Received: from [HIDDEN] (Authenticated sender: rostedt@goodmis.org) by omf20.hostedemail.com (Postfix) with ESMTPA id 8A6D220027; Tue, 18 Nov 2025 13:52:57 +0000 (UTC) Date: Tue, 18 Nov 2025 08:53:24 -0500 From: Steven Rostedt To: "Masami Hiramatsu (Google)" Cc: Steven Rostedt , linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, Mark Rutland , Mathieu Desnoyers , Andrew Morton , Peter Zijlstra , Thomas Gleixner , Ian Rogers , Namhyung Kim , Arnaldo Carvalho de Melo , Jiri Olsa , Douglas Raillard Subject: Re: [POC][RFC][PATCH 0/3] tracing: Add perf events to trace buffer Message-ID: <20251118085324.32816807@gandalf.local.home> In-Reply-To: <20251118171147.72d4f1e26407f8d54720e0f2@kernel.org> References: <20251118002950.680329246@kernel.org> <20251118120821.0c47ef684b53d5d9a2d6dc83@kernel.org> <20251117224227.782f6eab@batman.local.home> <20251118171147.72d4f1e26407f8d54720e0f2@kernel.org> 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-Rspamd-Server: rspamout04 X-Rspamd-Queue-Id: 8A6D220027 X-Stat-Signature: gar98u9ihc7n1jwfx6m66ef3an5k3o7i X-Session-Marker: 726F737465647440676F6F646D69732E6F7267 X-Session-ID: U2FsdGVkX1+YLNCnnRaXdo31052x8nmaVW2RmTc6lDY= X-HE-Tag: 1763473977-111348 X-HE-Meta: U2FsdGVkX1/OIx5NgS9H5bIEDHpB33q9BkdZ9ru2HN/dvkJOdROz7Q7c3X3DvZAN4Inri62x3WlQHUnHirV51hcHYkSnVV68DRPCKjbLXIpsknlfbC1sEpb5Kh33uNrj8kEg90qJp40BGdrHFIqX0UvQJKd0dtX6+w7mGtTmmaml9rz/RCQbJkB52J4sqf+dUtvRsjExG9l2M8pI+ZkSECO1sDLzDpwBwrXZ8BIMLBGtrQtEJSxV3qXOFutC+rTwFwsqrZ9JKnpbxWCTABdyux0oD2Rc64zf2UBRi3OXeW8CT9QMLSsXqJGNi3+7L04q/v9T0LasRtPertAJG66Cl4wjDRJyJNDo On Tue, 18 Nov 2025 17:11:47 +0900 Masami Hiramatsu (Google) wrote: > > > echo "perf:my_counter=pmu/config=M,config1=N" >> /sys/kernel/tracing/trigger > > > > Still need a way to add an identifier list. Currently, if the size of > > the type identifier is one byte, then it can only support up to 256 events. > > Yes, so if user adds more than that, it will return -ENOSPC. The issue is that the ids are defined by what is possible, not by what the user enables. -- Steve