From patchwork Thu Dec 3 12:41:15 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vineet Gupta X-Patchwork-Id: 552245 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2001:1868:205::9]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id C55831402C0 for ; Thu, 3 Dec 2015 23:43:18 +1100 (AEDT) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1a4TED-00041L-Fc; Thu, 03 Dec 2015 12:43:17 +0000 Received: from smtprelay4.synopsys.com ([198.182.47.9] helo=smtprelay.synopsys.com) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1a4TEB-0003yT-AI for linux-snps-arc@lists.infradead.org; Thu, 03 Dec 2015 12:43:15 +0000 Received: from dc8secmta2.synopsys.com (dc8secmta2.synopsys.com [10.13.218.202]) by smtprelay.synopsys.com (Postfix) with ESMTP id A841324E1583; Thu, 3 Dec 2015 04:42:59 -0800 (PST) Received: from dc8secmta2.internal.synopsys.com (dc8secmta2.internal.synopsys.com [127.0.0.1]) by dc8secmta2.internal.synopsys.com (Service) with ESMTP id 9D100A4114; Thu, 3 Dec 2015 04:42:59 -0800 (PST) Received: from mailhost.synopsys.com (mailhost1.synopsys.com [10.12.238.239]) by dc8secmta2.internal.synopsys.com (Service) with ESMTP id 7803FA4102; Thu, 3 Dec 2015 04:42:59 -0800 (PST) Received: from mailhost.synopsys.com (localhost [127.0.0.1]) by mailhost.synopsys.com (Postfix) with ESMTP id 6653EFA9; Thu, 3 Dec 2015 04:42:59 -0800 (PST) Received: from US01WEHTC3.internal.synopsys.com (us01wehtc3.internal.synopsys.com [10.15.84.232]) by mailhost.synopsys.com (Postfix) with ESMTP id 5978DFA8; Thu, 3 Dec 2015 04:42:59 -0800 (PST) Received: from IN01WEHTCB.internal.synopsys.com (10.144.199.106) by US01WEHTC3.internal.synopsys.com (10.15.84.232) with Microsoft SMTP Server (TLS) id 14.3.195.1; Thu, 3 Dec 2015 04:42:59 -0800 Received: from IN01WEHTCA.internal.synopsys.com (10.144.199.103) by IN01WEHTCB.internal.synopsys.com (10.144.199.105) with Microsoft SMTP Server (TLS) id 14.3.195.1; Thu, 3 Dec 2015 18:12:56 +0530 Received: from vineetg-E7440.internal.synopsys.com (10.12.197.182) by IN01WEHTCA.internal.synopsys.com (10.144.199.243) with Microsoft SMTP Server (TLS) id 14.3.195.1; Thu, 3 Dec 2015 18:12:55 +0530 From: Vineet Gupta To: Subject: [PATCH 17/17] xxx: instrument Date: Thu, 3 Dec 2015 18:11:15 +0530 Message-ID: <1449146475-15335-18-git-send-email-vgupta@synopsys.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1449146475-15335-1-git-send-email-vgupta@synopsys.com> References: <1449146475-15335-1-git-send-email-vgupta@synopsys.com> MIME-Version: 1.0 X-Originating-IP: [10.12.197.182] X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20151203_044315_365558_26B62256 X-CRM114-Status: UNSURE ( 9.32 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -2.6 (--) X-Spam-Report: SpamAssassin version 3.4.0 on bombadil.infradead.org summary: Content analysis details: (-2.6 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_MSPIKE_H3 RBL: Good reputation (+3) [198.182.47.9 listed in wl.mailspike.net] -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [198.182.47.9 listed in list.dnswl.org] -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] -0.0 RCVD_IN_MSPIKE_WL Mailspike good senders X-BeenThere: linux-snps-arc@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Linux on Synopsys ARC Processors List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Vineet Gupta , Alexey.Brodkin@synopsys.com, linux-kernel@vger.kernel.org, JBeulich@suse.com Sender: "linux-snps-arc" Errors-To: linux-snps-arc-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org Signed-off-by: Vineet Gupta --- arch/arc/kernel/unwind.c | 26 +++++++++++++++++++++++++- 1 file changed, 25 insertions(+), 1 deletion(-) diff --git a/arch/arc/kernel/unwind.c b/arch/arc/kernel/unwind.c index d5ffb4a78104..91f310465970 100644 --- a/arch/arc/kernel/unwind.c +++ b/arch/arc/kernel/unwind.c @@ -889,6 +889,19 @@ static int cie_validate(const u32 *cie, struct cie *t_cie) return end - (const u8 *)cie; } +#define UNWIND_INSTRUMENT + +#ifdef UNWIND_INSTRUMENT +u32 unw_t_min = 0xffffff, unw_t_max, unw_t_n; +u64 unw_t_avg; + +static unsigned int get_c(void) +{ + write_aux_reg(0x600, 0x42); // ARC_REG_MCIP_CMD + return read_aux_reg(0x602); // ARC_REG_MCIP_READBACK +} +#endif + /* Unwind to previous to frame. Returns 0 if successful, negative * number in case of an error. */ int arc_unwind(struct unwind_frame_info *frame) @@ -907,7 +920,9 @@ int arc_unwind(struct unwind_frame_info *frame) unsigned long addr; struct eh_frame_header *hdr; int ret = -EINVAL; - +#ifdef UNWIND_INSTRUMENT + unsigned int t0 = get_c(), t1, delta; +#endif unw_debug("\nUNWIND FRAME: -------------------------------------\n"); unw_debug("PC\t\t: 0x%lx %pS\nr31 [BLINK]\t: 0x%lx %pS\nr28 [SP]\t: 0x%lx\nr27 [FP]\t: 0x%lx\n", UNW_PC(frame), (void *)UNW_PC(frame), @@ -1072,6 +1087,15 @@ int arc_unwind(struct unwind_frame_info *frame) ret = 0; bad_unw: +#ifdef UNWIND_INSTRUMENT + t1 = get_c(); + delta = t1 - t0; + unw_t_min = min(unw_t_min, delta); + unw_t_max = max(unw_t_max, delta); + unw_t_n++; + unw_t_avg += delta; + printk("unw %d %s %lx\n", delta, !ret ? "O K":"nok", pc); +#endif return ret; #undef FRAME_REG }