From patchwork Fri Jun 9 15:03:24 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Valentin Schneider X-Patchwork-Id: 13274094 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3ABB8C7EE29 for ; Fri, 9 Jun 2023 15:05:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241734AbjFIPFv (ORCPT ); Fri, 9 Jun 2023 11:05:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44868 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240417AbjFIPFk (ORCPT ); Fri, 9 Jun 2023 11:05:40 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CBCC035B8 for ; Fri, 9 Jun 2023 08:04:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1686323069; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=snCuxFAiT0B/bnlHGtaiRqsJwVD+zCZujmUlSZJWpwM=; b=FYvttFH64LWYJcp7fnajMu/mF/2g4z/EazwGxwTHpP3IytegGxCHK4a9F6d60TIhtdXqCu zGOC/B9qp/EbwCFL4qB4+URujsBlEnzpNCiq0YnkSCzXLqjBV2t069hHsaJSlvtxo1Whzj YooSlBuvlQk8pL08x/+bEGTpz2JLJKE= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-80-nCse8t6ROPCfh-6T_4NSdQ-1; Fri, 09 Jun 2023 11:04:25 -0400 X-MC-Unique: nCse8t6ROPCfh-6T_4NSdQ-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.rdu2.redhat.com [10.11.54.2]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 73E2E101A52C; Fri, 9 Jun 2023 15:04:24 +0000 (UTC) Received: from vschneid.remote.csb (unknown [10.42.28.16]) by smtp.corp.redhat.com (Postfix) with ESMTPS id AACC54087C62; Fri, 9 Jun 2023 15:04:18 +0000 (UTC) From: Valentin Schneider To: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-doc@vger.kernel.org Cc: Steven Rostedt , Masami Hiramatsu , Jonathan Corbet , Juri Lelli , Daniel Bristot de Oliveira , Marcelo Tosatti , Leonardo Bras , Frederic Weisbecker Subject: [RFC PATCH 5/5] tracing/filters: Document cpumask filtering Date: Fri, 9 Jun 2023 16:03:24 +0100 Message-Id: <20230609150324.143538-6-vschneid@redhat.com> In-Reply-To: <20230609150324.143538-1-vschneid@redhat.com> References: <20230609150324.143538-1-vschneid@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.2 Precedence: bulk List-ID: X-Mailing-List: linux-trace-kernel@vger.kernel.org Cpumask, scalar and CPU fields can now be filtered by a user-provided cpumask, document the syntax. Signed-off-by: Valentin Schneider --- Documentation/trace/events.rst | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/Documentation/trace/events.rst b/Documentation/trace/events.rst index f5fcb8e1218f6..e9bc9f23891a0 100644 --- a/Documentation/trace/events.rst +++ b/Documentation/trace/events.rst @@ -219,6 +219,20 @@ the function "security_prepare_creds" and less than the end of that function. The ".function" postfix can only be attached to values of size long, and can only be compared with "==" or "!=". +Cpumask fields or scalar fields that encode a CPU number can be filtered using +a user-provided cpumask in cpulist format. The format is as follows:: + + MASK{$cpulist} + +Operators available to cpumask filtering are: + +& (intersection), ==, != + +For example, this will filter events that have their .target_cpu field present +in the given cpumask:: + + target_cpu & MASK{17-42} + 5.2 Setting filters -------------------