From: Joerg Roedel <joerg.roedel-5C7GfCeVMHo@public.gmane.org>
To: Hiroshi Doyu <hdoyu-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [v2 1/1] iommu/tegra: smmu: debugfs for TLB/PTC statistics
Date: Fri, 3 Aug 2012 17:57:40 +0200 [thread overview]
Message-ID: <20120803155740.GI1996@amd.com> (raw)
In-Reply-To: <1343897200-3396-1-git-send-email-hdoyu-DDmLM1+adcrQT0dZR+AlfA@public.gmane.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:<HIT count><SPC>miss:<MISS count><SPC><CR+LF>
>
> fscanf(fp, "hit:%lx miss:%lx", &hit, &miss);
>
> Signed-off-by: Hiroshi Doyu <hdoyu-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
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
prev parent reply other threads:[~2012-08-03 15:57 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-31 5:14 [PATCH 1/1] iommu/tegra: smmu: debugfs for TLB/PTC statistics Hiroshi Doyu
[not found] ` <1343711681-23394-1-git-send-email-hdoyu-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2012-08-02 8:46 ` [v2 " Hiroshi Doyu
[not found] ` <1343897200-3396-1-git-send-email-hdoyu-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2012-08-03 15:57 ` Joerg Roedel [this message]
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