From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joerg Roedel Subject: Re: [v2 1/1] iommu/tegra: smmu: debugfs for TLB/PTC statistics Date: Fri, 3 Aug 2012 17:57:40 +0200 Message-ID: <20120803155740.GI1996@amd.com> References: <1343711681-23394-1-git-send-email-hdoyu@nvidia.com> <1343897200-3396-1-git-send-email-hdoyu@nvidia.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Return-path: Content-Disposition: inline In-Reply-To: <1343897200-3396-1-git-send-email-hdoyu-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> Sender: linux-tegra-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Hiroshi Doyu Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-tegra@vger.kernel.org On Thu, Aug 02, 2012 at 11:46:40AM +0300, Hiroshi Doyu wrote: > Add debugfs entries to collect TLB/PTC statistics. > > $ echo "reset" > /sys/kernel/debug/smmu/mc/{tlb,ptc} > $ echo "on" > /sys/kernel/debug/smmu/mc/{tlb,ptc} > $ echo "off" > /sys/kernel/debug/smmu/mc/{tlb,ptc} > $ cat /sys/kernel/debug/smmu/mc/{tlb,ptc} > hit:0014910c miss:00014d22 > > The above format is: > hit:miss: > > fscanf(fp, "hit:%lx miss:%lx", &hit, &miss); > > Signed-off-by: Hiroshi Doyu Applied to arm/tegra, thanks. -- AMD Operating System Research Center Advanced Micro Devices GmbH Einsteinring 24 85609 Dornach General Managers: Alberto Bozzo Registration: Dornach, Landkr. Muenchen; Registerger. Muenchen, HRB Nr. 43632