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i965: Make a screen::aperture_threshold field.

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This is the threshold after which drm_intel_bufmgr_check_aperture_space
returns -ENOSPC, signalling that it thinks an execbuf is likely to fail
and we need to roll back and flush the batch.

We'll need this when we rewrite aperture space checking, shortly.
In the meantime, we can also use it in GLX_MESA_query_renderer.

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
This commit is contained in:
Kenneth Graunke 2017-03-30 22:27:42 -07:00
parent 6079f4f16e
commit 6368284a34
2 changed files with 6 additions and 3 deletions
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6
src/mesa/drivers/dri/i965/intel_screen.c
View file

@ -983,10 +983,8 @@ brw_query_renderer_integer(__DRIscreen *dri_screen,
* assume that there's some fragmentation, and we start doing extra
* flushing, etc. That's the big cliff apps will care about.
*/
uint64_t aper_size = get_aperture_size(dri_screen->fd);
const unsigned gpu_mappable_megabytes =
(aper_size / (1024 * 1024)) * 3 / 4;
screen->aperture_threshold / (1024 * 1024);
const long system_memory_pages = sysconf(_SC_PHYS_PAGES);
const long system_page_size = sysconf(_SC_PAGE_SIZE);
@ -1860,6 +1858,8 @@ __DRIconfig **intelInitScreen2(__DRIscreen *dri_screen)
screen->max_gtt_map_object_size = gtt_size / 4;
}
screen->aperture_threshold = get_aperture_size(dri_screen->fd) * 3 / 4;
screen->hw_has_swizzling = intel_detect_swizzling(screen);
screen->hw_has_timestamp = intel_detect_timestamp(screen);

3
src/mesa/drivers/dri/i965/intel_screen.h
View file

@ -50,6 +50,9 @@ struct intel_screen
uint64_t max_gtt_map_object_size;
/** Bytes of aperture usage beyond which execbuf is likely to fail. */
uint64_t aperture_threshold;
bool no_hw;
bool hw_has_swizzling;
bool has_exec_fence; /**< I915_PARAM_HAS_EXEC_FENCE */