Re: [PATCH] intel_get_llc_size: Small tool to query LLC size

From: Daniel Vetter <daniel@ffwll.ch>
To: Ben Widawsky <ben@bwidawsk.net>
Cc: Intel GFX <intel-gfx@lists.freedesktop.org>,
	Bryan Bell <bryan.j.bell@intel.com>
Subject: Re: [PATCH] intel_get_llc_size: Small tool to query LLC size
Date: Wed, 10 Jul 2013 19:45:00 +0200	[thread overview]
Message-ID: <20130710174500.GI6143@phenom.ffwll.local> (raw)
In-Reply-To: <20130710172427.GE3326@bwidawsk.net>

On Wed, Jul 10, 2013 at 10:24:27AM -0700, Ben Widawsky wrote:
> On Wed, Jul 10, 2013 at 07:15:43PM +0200, Daniel Vetter wrote:
> > On Wed, Jul 10, 2013 at 09:58:38AM -0700, Ben Widawsky wrote:
> > > On Wed, Jul 10, 2013 at 08:34:18AM +0200, Daniel Vetter wrote:
> > > > On Tue, Jul 09, 2013 at 07:58:03PM -0700, Ben Widawsky wrote:
> > > > > CC: Chad Versace <chad.versace@linux.intel.com>
> > > > > CC: Bryan Bell <bryan.j.bell@intel.com>
> > > > > Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
> > > > 
> > > > So I think we should run this from igt and check its return value. And
> > > > since we've had a few bugs with other (currently untested) igt tools, can
> > > > you please add a new igt_tools testcase which just runs those? I'm
> > > > thinking of intel_reg_dumper and intel_reg_read (with some render ring
> > > > register that exists everywhere) on top of running intel_get_llc_size
> > > > here.
> > > 
> > > What would you like exactly for the check? Just to make sure platforms
> > > that should have LLC return a value > 1?
> > 
> > Just check that it runs without an non-zero exit code.
> 
> That doesn't really check the interface works as advertised though. Same
> for the below.

It checks more than nothing and at least in the case of reg IO breakage in
the past that was good enough to catch things.
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch