From nobody Fri Sep 20 19:30:04 2024 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 120F4EB64D7 for ; Wed, 14 Jun 2023 03:21:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242438AbjFNDVA (ORCPT ); Tue, 13 Jun 2023 23:21:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48222 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242375AbjFNDUy (ORCPT ); Tue, 13 Jun 2023 23:20:54 -0400 Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 27DC0196 for ; Tue, 13 Jun 2023 20:20:52 -0700 (PDT) X-UUID: 7448ce220a6211ee9cb5633481061a41-20230614 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=0BfjF76ESE9qlEo/M4tmdgd9Cz9dPTxPRYkOuq+JFp8=; b=E0dHYKNdsOaYh3MOAGT2GsvbMcIC2y4EC3dm991DoRjPfVnqEEsaei1f4VWwDKugTbDooNFcZomNtZeGjjbtG4TZAVg/uLYvvmWkhgOU4FIpYA5tRHhgfIbrj4SvqlMq1/b7IrmdagCX1P9qOXQZzcXJaA9oPL6slhV6GqzfgkA=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.26,REQID:e1dc4df5-48b4-45c3-b398-782a15812266,IP:0,U RL:0,TC:0,Content:-5,EDM:0,RT:0,SF:100,FILE:0,BULK:0,RULE:Release_Ham,ACTI ON:release,TS:95 X-CID-INFO: VERSION:1.1.26,REQID:e1dc4df5-48b4-45c3-b398-782a15812266,IP:0,URL :0,TC:0,Content:-5,EDM:0,RT:0,SF:100,FILE:0,BULK:0,RULE:Spam_GS981B3D,ACTI ON:quarantine,TS:95 X-CID-META: VersionHash:cb9a4e1,CLOUDID:36c55a3e-de1e-4348-bc35-c96f92f1dcbb,B ulkID:230614112049KEA40V85,BulkQuantity:0,Recheck:0,SF:28|17|19|48|38|29,T C:nil,Content:0,EDM:-3,IP:nil,URL:0,File:nil,Bulk:nil,QS:nil,BEC:nil,COL:0 ,OSI:0,OSA:0,AV:0,LES:1,SPR:NO X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-CID-FACTOR: TF_CID_SPAM_ASC,TF_CID_SPAM_FAS,TF_CID_SPAM_FSD,TF_CID_SPAM_SNR, TF_CID_SPAM_SDM X-UUID: 7448ce220a6211ee9cb5633481061a41-20230614 Received: from mtkmbs13n1.mediatek.inc [(172.21.101.193)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 680255152; Wed, 14 Jun 2023 11:20:46 +0800 Received: from mtkmbs13n1.mediatek.inc (172.21.101.193) by mtkmbs10n2.mediatek.inc (172.21.101.183) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Wed, 14 Jun 2023 11:20:45 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs13n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Wed, 14 Jun 2023 11:20:45 +0800 From: Wei Chin Tsai To: , Matthias Brugger , AngeloGioacchino Del Regno CC: , , , , Wei Chin Tsai , , Subject: [PATCH v2 1/3] kernel : process fork/exit: export symbol for fork/exit tracing functions Date: Wed, 14 Jun 2023 11:20:33 +0800 Message-ID: <20230614032038.11699-2-Wei-chin.Tsai@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20230614032038.11699-1-Wei-chin.Tsai@mediatek.com> References: <20230614032038.11699-1-Wei-chin.Tsai@mediatek.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" In ths Patch, we export symbols for two functions of "sched_process_fork" and "sched_process_exit" for process statistics. During the system running, some process will run in a second and then terminate. We hope that we can capture those processes' jiffies information for system performance analysis. Signed-off-by: Wei Chin Tsai --- kernel/exit.c | 2 ++ kernel/fork.c | 2 ++ 2 files changed, 4 insertions(+) diff --git a/kernel/exit.c b/kernel/exit.c index edb50b4c9972..410a3de14e09 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -81,6 +81,8 @@ */ static unsigned int oops_limit =3D 10000; =20 +EXPORT_TRACEPOINT_SYMBOL_GPL(sched_process_exit); + #ifdef CONFIG_SYSCTL static struct ctl_table kern_exit_table[] =3D { { diff --git a/kernel/fork.c b/kernel/fork.c index f81985dcc4bd..8fba356fb7c2 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -142,6 +142,8 @@ DEFINE_PER_CPU(unsigned long, process_counts) =3D 0; =20 __cacheline_aligned DEFINE_RWLOCK(tasklist_lock); /* outer */ =20 +EXPORT_TRACEPOINT_SYMBOL_GPL(sched_process_fork); + #ifdef CONFIG_PROVE_RCU int lockdep_tasklist_lock_is_held(void) { --=20 2.18.0