[Intel-gfx] [PATCH 1/2] intel: Add support for overriding the PCI ID via an environment variable
kenneth at whitecape.org
Tue Feb 21 23:42:37 CET 2012
On 02/21/2012 01:11 PM, Chris Wilson wrote:
> On Tue, 21 Feb 2012 12:59:37 -0800, Kenneth Graunke<kenneth at whitecape.org> wrote:
>> @@ -1828,6 +1829,9 @@ drm_intel_gem_bo_mrb_exec2(drm_intel_bo *bo, int used,
>> execbuf.rsvd1 = 0;
>> execbuf.rsvd2 = 0;
>> + if (getenv("INTEL_DEVID_OVERRIDE"))
>> + goto skip_execution;
> I'm not thrilled about calling getenv() for every execbuffer.
Good point. I'll have to fix that.
> And what about the original execbuffer path?
Does anybody care? I'm not even sure how I'd test it.
A little bit of background: this is a stepping stone on the way to
When INTEL_DEVID_OVERRIDE is set, Mesa will generate code/batches for
that system, rather than the current machine. It also implicitly sets
INTEL_NO_HW=1, which makes it avoid calling execbuf2. This at least
allows INTEL_DEBUG=vs,wm,bat style dumps, which is handy.
However, our .aub trace file support is in libdrm, so I need Mesa to
execbuf, or I don't get aub file dumps. But I don't want libdrm to
-actually- exec it.
More information about the Intel-gfx