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| author | Damien Lespiau <damien.lespiau@intel.com> | 2015-02-14 18:30:29 +0000 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2015-02-24 00:07:05 +0100 |
| commit | b76687910693b1f6c32a3251a8291d67363bba34 (patch) | |
| tree | 6452da876111dc6dbd93be1913ec0df3186e3f5b /drivers/gpu/drm/i915/i915_drv.h | |
| parent | cb0a08c1ed7daa16d13876e3e1b8787d95b25b0e (diff) | |
| download | lwn-b76687910693b1f6c32a3251a8291d67363bba34.tar.gz lwn-b76687910693b1f6c32a3251a8291d67363bba34.zip | |
drm/i915/skl: Tune IZ hashing when subslices are unbalanced
When one EU is disabled in a particular subslice, we can tune how the
work is spread between subslices to improve EU utilization.
v2: - Use a bitfield to record which subslice(s) has(have) 7 EUs. That
will also make the machinery work if several sublices have 7 EUs.
(Jeff Mcgee)
- Only apply the different hashing algorithm if the slice is
effectively unbalanced by checking there's a single subslice with
7 EUs. (Jeff Mcgee)
v3: Fix typo in comment (Jeff Mcgee)
Issue: VIZ-3845
Cc: Jeff Mcgee <jeff.mcgee@intel.com>
Reviewed-by: Jeff Mcgee <jeff.mcgee@intel.com>
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_drv.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 61d41abde2e9..4280d0b292da 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -700,6 +700,8 @@ struct intel_device_info { u8 subslice_per_slice; u8 eu_total; u8 eu_per_subslice; + /* For each slice, which subslice(s) has(have) 7 EUs (bitfield)? */ + u8 subslice_7eu[3]; u8 has_slice_pg:1; u8 has_subslice_pg:1; u8 has_eu_pg:1; |