Received: with ECARTIS (v1.0.0; list linux-mips); Sat, 20 Dec 2014 02:53:10 +0100 (CET) Received: from mail-ie0-f179.google.com ([209.85.223.179]:48297 "EHLO mail-ie0-f179.google.com" rhost-flags-OK-OK-OK-OK) by eddie.linux-mips.org with ESMTP id S27009103AbaLTBwvcD0Qe (ORCPT ); Sat, 20 Dec 2014 02:52:51 +0100 Received: by mail-ie0-f179.google.com with SMTP id rp18so1778306iec.10; Fri, 19 Dec 2014 17:52:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=Jf3NfulJJbEQbm43C5pQAlR4L3PKnJxBpifE1Vb6Rus=; b=ikMffkMQN/LV9xwwunXD43xepBOqBUJotzt4Tz7FaxeMWLrOGF1Rpr+L1C6RKwfHaC ioWWkWCTBBNJsyK/d2ReFfPvJWI/NnAseDdSwf2w+rxUTV5AyEhvdD13XbUGwIbdIu8C InvlqwaTMsmZtffVN6zchqY4Uug7iyMcj9F/kmEhGNmQ8gGGCmCmvW/f4Fc0KmQhL9U8 BkP/ZT0g++g7ag0tla8l7IZ68y1dzcrirnKM8k3XLjZf9JSiqHCeAQ4R9XL6ps66THii Aw9qB7HNc1067F2nXqC/S21It3gBWVpyTcdlU+2J5htNreFqean630WdtY0Ee/S6yEWq 6B0g== X-Received: by 10.50.28.49 with SMTP id y17mr6204587igg.3.1419040365748; Fri, 19 Dec 2014 17:52:45 -0800 (PST) Received: from dl.caveonetworks.com (64.2.3.194.ptr.us.xo.net. [64.2.3.194]) by mx.google.com with ESMTPSA id n17sm2886120igi.2.2014.12.19.17.52.44 (version=TLSv1 cipher=RC4-SHA bits=128/128); Fri, 19 Dec 2014 17:52:45 -0800 (PST) Received: from dl.caveonetworks.com (localhost.localdomain [127.0.0.1]) by dl.caveonetworks.com (8.14.5/8.14.5) with ESMTP id sBK1qhZL008546; Fri, 19 Dec 2014 17:52:43 -0800 Received: (from ddaney@localhost) by dl.caveonetworks.com (8.14.5/8.14.5/Submit) id sBK1qhLA008544; Fri, 19 Dec 2014 17:52:43 -0800 From: David Daney To: linux-mips@linux-mips.org, ralf@linux-mips.org Cc: David Daney Subject: [RFC PATCH v2 1/5] MIPS: Add FPU emulator counter for emulated delay slots. Date: Fri, 19 Dec 2014 17:52:36 -0800 Message-Id: <1419040360-8502-2-git-send-email-ddaney.cavm@gmail.com> X-Mailer: git-send-email 1.7.11.7 In-Reply-To: <1419040360-8502-1-git-send-email-ddaney.cavm@gmail.com> References: <1419040360-8502-1-git-send-email-ddaney.cavm@gmail.com> Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 44866 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: ddaney.cavm@gmail.com Precedence: bulk List-help: List-unsubscribe: List-software: Ecartis version 1.0.0 List-Id: linux-mips X-List-ID: linux-mips List-subscribe: List-owner: List-post: List-archive: X-list: linux-mips From: David Daney Delay slot emulation in the FPU emulator is the only kernel user of an executable stack, it is also very slow. Add a counter so we can see how many of these emulations are done. Signed-off-by: David Daney --- arch/mips/include/asm/fpu_emulator.h | 1 + arch/mips/math-emu/dsemul.c | 2 +- arch/mips/math-emu/me-debugfs.c | 1 + 3 files changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/mips/include/asm/fpu_emulator.h b/arch/mips/include/asm/fpu_emulator.h index 3ee3477..6370c82 100644 --- a/arch/mips/include/asm/fpu_emulator.h +++ b/arch/mips/include/asm/fpu_emulator.h @@ -44,6 +44,7 @@ struct mips_fpu_emulator_stats { unsigned long ieee754_overflow; unsigned long ieee754_zerodiv; unsigned long ieee754_invalidop; + unsigned long ds_emul; }; DECLARE_PER_CPU(struct mips_fpu_emulator_stats, fpuemustats); diff --git a/arch/mips/math-emu/dsemul.c b/arch/mips/math-emu/dsemul.c index 4f514f3..58f5818 100644 --- a/arch/mips/math-emu/dsemul.c +++ b/arch/mips/math-emu/dsemul.c @@ -158,6 +158,6 @@ int do_dsemulret(struct pt_regs *xcp) /* Set EPC to return to post-branch instruction */ xcp->cp0_epc = epc; - + MIPS_FPU_EMU_INC_STATS(ds_emul); return 1; } diff --git a/arch/mips/math-emu/me-debugfs.c b/arch/mips/math-emu/me-debugfs.c index becdd63..f308e0f 100644 --- a/arch/mips/math-emu/me-debugfs.c +++ b/arch/mips/math-emu/me-debugfs.c @@ -61,6 +61,7 @@ do { \ FPU_STAT_CREATE(ieee754_overflow); FPU_STAT_CREATE(ieee754_zerodiv); FPU_STAT_CREATE(ieee754_invalidop); + FPU_STAT_CREATE(ds_emul); return 0; } -- 1.7.11.7