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From: =?ISO-8859-1?Q?Terje_Bergstr=F6m?= <tbergstrom@nvidia.com>
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To: Thierry Reding <thierry.reding@avionic-design.de>
CC: Arto Merilainen <amerilainen@nvidia.com>,
        "airlied@linux.ie" <airlied@linux.ie>,
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Subject: Re: [PATCHv5,RESEND 8/8] drm: tegra: Add gr2d device
References: <1358250244-9678-1-git-send-email-tbergstrom@nvidia.com> <1358250244-9678-9-git-send-email-tbergstrom@nvidia.com> <20130204125618.GD595@avionic-0098.mockup.avionic-design.de> <511095F9.6040607@nvidia.com> <20130205095403.GF20437@avionic-0098.mockup.avionic-design.de> <5112C9C5.8080205@nvidia.com> <20130208070734.GB15429@avionic-0098.mockup.avionic-design.de> <51183E8D.1090607@nvidia.com> <20130211064452.GA16676@avionic-0098.mockup.avionic-design.de>
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On 10.02.2013 22:44, Thierry Reding wrote:
> On Sun, Feb 10, 2013 at 04:42:53PM -0800, Terje Bergström wrote:
>> You're right about performance. We already saw quite a bad performance
>> hit with the current firewall, so we'll need to worry about performance
>> later.
> 
> I guess the additional overhead of looking up in a table vs. an actual
> function being run will be rather small compared to the total overhead
> incurred by having the firewall in the first place.

Yeah, I'll just implement a simple linear table lookup and let's see
what happens. I'll optimize with bitfield if needed.

Terje