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authorMarek Olšák <[email protected]>2017-10-26 03:17:29 +0200
committerMarek Olšák <[email protected]>2017-11-06 19:09:12 +0100
commit71f5fe36b7f4f092398d27a130ef18b7e0913889 (patch)
treef9ab4e6ee98b5fd277e5d775108376c26aae373a /docs/debugging.html
parent3f58988b81965fc70fe8770b4d8912cf12f0a6f1 (diff)
gallium/u_vbuf: use signed vertex buffers offsets for optimal uploads
Uploaded data must start at (stride * start), because we can't modify start in all cases. If it's the first allocation, it's also the amount of memory wasted. If the starting offset is larger than the size of the upload buffer, the buffer is re-created, used for 1 upload, and then thrown away. If the upload is small, most of the buffer space is unused and wasted. Keep doing that and the OOM killer comes. It's actually pretty quick. With signed VB offsets, we can set min_out_offset = 0 in u_upload_alloc/u_upload_data. This fixes OOM situations with SPECviewperf.
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