nefarius/qxl-wddm-dod
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qxl-wddm-dod: Optimize allocation of memory chunks

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Increased size of allocation to reduce number of allocation per
bitmap. Before change the procedure ignored 'alloc_size' parameter
and always allocated memory chunk according to 'size' parameter.
As a result, first chunk could be up to 64K and all following are
limited by line size. For example, for bitmap 1280x1024 there was
more than 1008 chunks allocated, for bitmap 128x1024 - 897 chunks.
We change the procedure to use chunk size up to 64K (similar to first
chunk). This reduces in described examples number of allocation from
1008 to 64 and from 897 to 8 respectively.

Signed-off-by: Yuri Benditovich <yuri.benditovich@daynix.com>
Acked-by: Frediano Ziglio <fziglio@redhat.com>
This commit is contained in:
yuri.benditovich@daynix.com 2017-04-08 13:46:52 +03:00 committed by Frediano Ziglio
parent 9721a48dc9
commit 06a4f7a846
1 changed files with 1 additions and 1 deletions
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qxldod/QxlDod.cpp
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@ -4544,7 +4544,7 @@ BOOLEAN QxlDevice::PutBytesAlign(QXLDataChunk **chunk_ptr, UINT8 **now_ptr,
UINT8 *now = *now_ptr;
UINT8 *end = *end_ptr;
size_t maxAllocSize = BITS_BUF_MAX - BITS_BUF_MAX % size;
alloc_size = MIN(size, maxAllocSize);
alloc_size = MIN(alloc_size, maxAllocSize);
DbgPrint(TRACE_LEVEL_VERBOSE, ("---> %s\n", __FUNCTION__));
while (size) {