Added VmaPoolStats::unusedRangeSizeMax.

README.md

@@ -29,7 +29,7 @@ This library can help game developers to manage memory allocations and resource
 1. Functions that help to choose correct and optimal memory type based on intended usage of the memory.
    - Required or preferred traits of the memory are expressed using higher-level description comparing to Vulkan flags.
 2. Functions that allocate memory blocks, reserve and return parts of them (`VkDeviceMemory` + offset + size) to the user.
-   - Library keeps track of allocated memory blocks, used and unused ranges inside them, finds best matching unused ranges for new allocations, takes all the rules of alignment into consideration.
+   - Library keeps track of allocated memory blocks, used and unused ranges inside them, finds best matching unused ranges for new allocations, takes all the rules of alignment and buffer/image granularity into consideration.
 3. Functions that can create an image/buffer, allocate memory for it and bind them together - all in one call.
 
 Additional features:

docs/html/functions.html

@@ -236,6 +236,9 @@ $(function() {
 <li>UnusedRangeSizeAvg
 : <a class="el" href="struct_vma_stat_info.html#a88ad9bdc2b3a98964a4d0c338c0c9060">VmaStatInfo</a>
 </li>
+<li>unusedRangeSizeMax
+: <a class="el" href="struct_vma_pool_stats.html#ab4c8f52dd42ab01998f60f0b6acc722b">VmaPoolStats</a>
+</li>
 <li>UnusedRangeSizeMax
 : <a class="el" href="struct_vma_stat_info.html#a10c52c0841f01ca704e8ddb1ea6a635d">VmaStatInfo</a>
 </li>

docs/html/functions_vars.html

@@ -236,6 +236,9 @@ $(function() {
 <li>UnusedRangeSizeAvg
 : <a class="el" href="struct_vma_stat_info.html#a88ad9bdc2b3a98964a4d0c338c0c9060">VmaStatInfo</a>
 </li>
+<li>unusedRangeSizeMax
+: <a class="el" href="struct_vma_pool_stats.html#ab4c8f52dd42ab01998f60f0b6acc722b">VmaPoolStats</a>
+</li>
 <li>UnusedRangeSizeMax
 : <a class="el" href="struct_vma_stat_info.html#a10c52c0841f01ca704e8ddb1ea6a635d">VmaStatInfo</a>
 </li>

docs/html/search/all_c.js

@@ -1,9 +1,9 @@
 var searchData=
 [
   ['unusedbytes',['UnusedBytes',['../struct_vma_stat_info.html#a394d2aef4348cb58abf73764804b4f2d',1,'VmaStatInfo']]],
-  ['unusedrangecount',['unusedRangeCount',['../struct_vma_pool_stats.html#ae4f3546ffa4d1e598b64d8e6134854f4',1,'VmaPoolStats::unusedRangeCount()'],['../struct_vma_stat_info.html#a56c4fb4dba646479180b601854cde2a6',1,'VmaStatInfo::UnusedRangeCount()']]],
+  ['unusedrangecount',['UnusedRangeCount',['../struct_vma_stat_info.html#a56c4fb4dba646479180b601854cde2a6',1,'VmaStatInfo::UnusedRangeCount()'],['../struct_vma_pool_stats.html#ae4f3546ffa4d1e598b64d8e6134854f4',1,'VmaPoolStats::unusedRangeCount()']]],
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-  ['unusedrangesizemax',['UnusedRangeSizeMax',['../struct_vma_stat_info.html#a10c52c0841f01ca704e8ddb1ea6a635d',1,'VmaStatInfo']]],
+  ['unusedrangesizemax',['unusedRangeSizeMax',['../struct_vma_pool_stats.html#ab4c8f52dd42ab01998f60f0b6acc722b',1,'VmaPoolStats::unusedRangeSizeMax()'],['../struct_vma_stat_info.html#a10c52c0841f01ca704e8ddb1ea6a635d',1,'VmaStatInfo::UnusedRangeSizeMax()']]],
   ['unusedrangesizemin',['UnusedRangeSizeMin',['../struct_vma_stat_info.html#a07c508f42a4d3424bd0c259784a7f2d6',1,'VmaStatInfo']]],
   ['unusedsize',['unusedSize',['../struct_vma_pool_stats.html#ad7c54874724fce7b06aba526202d82a8',1,'VmaPoolStats']]],
   ['usage',['usage',['../struct_vma_allocation_create_info.html#accb8b06b1f677d858cb9af20705fa910',1,'VmaAllocationCreateInfo']]],

docs/html/search/variables_a.js

@@ -1,9 +1,9 @@
 var searchData=
 [
   ['unusedbytes',['UnusedBytes',['../struct_vma_stat_info.html#a394d2aef4348cb58abf73764804b4f2d',1,'VmaStatInfo']]],
-  ['unusedrangecount',['unusedRangeCount',['../struct_vma_pool_stats.html#ae4f3546ffa4d1e598b64d8e6134854f4',1,'VmaPoolStats::unusedRangeCount()'],['../struct_vma_stat_info.html#a56c4fb4dba646479180b601854cde2a6',1,'VmaStatInfo::UnusedRangeCount()']]],
+  ['unusedrangecount',['UnusedRangeCount',['../struct_vma_stat_info.html#a56c4fb4dba646479180b601854cde2a6',1,'VmaStatInfo::UnusedRangeCount()'],['../struct_vma_pool_stats.html#ae4f3546ffa4d1e598b64d8e6134854f4',1,'VmaPoolStats::unusedRangeCount()']]],
   ['unusedrangesizeavg',['UnusedRangeSizeAvg',['../struct_vma_stat_info.html#a88ad9bdc2b3a98964a4d0c338c0c9060',1,'VmaStatInfo']]],
-  ['unusedrangesizemax',['UnusedRangeSizeMax',['../struct_vma_stat_info.html#a10c52c0841f01ca704e8ddb1ea6a635d',1,'VmaStatInfo']]],
+  ['unusedrangesizemax',['unusedRangeSizeMax',['../struct_vma_pool_stats.html#ab4c8f52dd42ab01998f60f0b6acc722b',1,'VmaPoolStats::unusedRangeSizeMax()'],['../struct_vma_stat_info.html#a10c52c0841f01ca704e8ddb1ea6a635d',1,'VmaStatInfo::UnusedRangeSizeMax()']]],
   ['unusedrangesizemin',['UnusedRangeSizeMin',['../struct_vma_stat_info.html#a07c508f42a4d3424bd0c259784a7f2d6',1,'VmaStatInfo']]],
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   ['usage',['usage',['../struct_vma_allocation_create_info.html#accb8b06b1f677d858cb9af20705fa910',1,'VmaAllocationCreateInfo']]],

docs/html/struct_vma_pool_stats-members.html

@@ -68,7 +68,8 @@ $(function() {
   <tr class="even"><td class="entry"><a class="el" href="struct_vma_pool_stats.html#ad1924eb54fffa45e9e0e65670c8fe5eb">allocationCount</a></td><td class="entry"><a class="el" href="struct_vma_pool_stats.html">VmaPoolStats</a></td><td class="entry"></td></tr>
   <tr><td class="entry"><a class="el" href="struct_vma_pool_stats.html#a326807b2de2b0931cee4ed9a5f2e420c">size</a></td><td class="entry"><a class="el" href="struct_vma_pool_stats.html">VmaPoolStats</a></td><td class="entry"></td></tr>
   <tr class="even"><td class="entry"><a class="el" href="struct_vma_pool_stats.html#ae4f3546ffa4d1e598b64d8e6134854f4">unusedRangeCount</a></td><td class="entry"><a class="el" href="struct_vma_pool_stats.html">VmaPoolStats</a></td><td class="entry"></td></tr>
-  <tr><td class="entry"><a class="el" href="struct_vma_pool_stats.html#ad7c54874724fce7b06aba526202d82a8">unusedSize</a></td><td class="entry"><a class="el" href="struct_vma_pool_stats.html">VmaPoolStats</a></td><td class="entry"></td></tr>
+  <tr><td class="entry"><a class="el" href="struct_vma_pool_stats.html#ab4c8f52dd42ab01998f60f0b6acc722b">unusedRangeSizeMax</a></td><td class="entry"><a class="el" href="struct_vma_pool_stats.html">VmaPoolStats</a></td><td class="entry"></td></tr>
+  <tr class="even"><td class="entry"><a class="el" href="struct_vma_pool_stats.html#ad7c54874724fce7b06aba526202d82a8">unusedSize</a></td><td class="entry"><a class="el" href="struct_vma_pool_stats.html">VmaPoolStats</a></td><td class="entry"></td></tr>
 </table></div><!-- contents -->
 <!-- start footer part -->
 <hr class="footer"/><address class="footer"><small>

docs/html/struct_vma_pool_stats.html

@@ -85,6 +85,9 @@ Public Attributes</h2></td></tr>
 <tr class="memitem:ae4f3546ffa4d1e598b64d8e6134854f4"><td class="memItemLeft" align="right" valign="top">size_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="struct_vma_pool_stats.html#ae4f3546ffa4d1e598b64d8e6134854f4">unusedRangeCount</a></td></tr>
 <tr class="memdesc:ae4f3546ffa4d1e598b64d8e6134854f4"><td class="mdescLeft">&#160;</td><td class="mdescRight">Number of continuous memory ranges in the pool not used by any <code>VmaAllocation</code>.  <a href="#ae4f3546ffa4d1e598b64d8e6134854f4">More...</a><br /></td></tr>
 <tr class="separator:ae4f3546ffa4d1e598b64d8e6134854f4"><td class="memSeparator" colspan="2">&#160;</td></tr>
+<tr class="memitem:ab4c8f52dd42ab01998f60f0b6acc722b"><td class="memItemLeft" align="right" valign="top">VkDeviceSize&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="struct_vma_pool_stats.html#ab4c8f52dd42ab01998f60f0b6acc722b">unusedRangeSizeMax</a></td></tr>
+<tr class="memdesc:ab4c8f52dd42ab01998f60f0b6acc722b"><td class="mdescLeft">&#160;</td><td class="mdescRight">Size of the largest continuous free memory region.  <a href="#ab4c8f52dd42ab01998f60f0b6acc722b">More...</a><br /></td></tr>
+<tr class="separator:ab4c8f52dd42ab01998f60f0b6acc722b"><td class="memSeparator" colspan="2">&#160;</td></tr>
 </table>
 <a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
 <div class="textblock"><p>Describes parameter of existing VmaPool. </p>
@@ -135,6 +138,23 @@ Public Attributes</h2></td></tr>
 
 <p>Number of continuous memory ranges in the pool not used by any <code>VmaAllocation</code>. </p>
 
+</div>
+</div>
+<a id="ab4c8f52dd42ab01998f60f0b6acc722b"></a>
+<h2 class="memtitle"><span class="permalink"><a href="#ab4c8f52dd42ab01998f60f0b6acc722b">&#9670;&nbsp;</a></span>unusedRangeSizeMax</h2>
+
+<div class="memitem">
+<div class="memproto">
+      <table class="memname">
+        <tr>
+          <td class="memname">VkDeviceSize VmaPoolStats::unusedRangeSizeMax</td>
+        </tr>
+      </table>
+</div><div class="memdoc">
+
+<p>Size of the largest continuous free memory region. </p>
+<p>Making a new allocation of that size is not guaranteed to succeed because of possible additional margin required to respect alignment and buffer/image granularity. </p>
+
 </div>
 </div>
 <a id="ad7c54874724fce7b06aba526202d82a8"></a>

src/vk_mem_alloc.h

@@ -845,6 +845,13 @@ typedef struct VmaPoolStats {
     /** \brief Number of continuous memory ranges in the pool not used by any `VmaAllocation`.
     */
     size_t unusedRangeCount;
+    /** \brief Size of the largest continuous free memory region.
+
+    Making a new allocation of that size is not guaranteed to succeed because of
+    possible additional margin required to respect alignment and buffer/image
+    granularity.
+    */
+    VkDeviceSize unusedRangeSizeMax;
 } VmaPoolStats;
 
 /** \brief Allocates Vulkan device memory and creates `VmaPool` object.
@@ -3049,6 +3056,8 @@ public:
     
     // Validates all data structures inside this object. If not valid, returns false.
     bool Validate() const;
+
+    VkDeviceSize GetUnusedRangeSizeMax() const;
     
     // Tries to find a place for suballocation with given parameters inside this allocation.
     // If succeeded, fills pAllocationRequest and returns true.
@@ -4281,6 +4290,18 @@ bool VmaDeviceMemoryBlock::Validate() const
         (calculatedFreeCount == m_FreeCount);
 }
 
+VkDeviceSize VmaDeviceMemoryBlock::GetUnusedRangeSizeMax() const
+{
+    if(!m_FreeSuballocationsBySize.empty())
+    {
+        return m_FreeSuballocationsBySize.back()->size;
+    }
+    else
+    {
+        return 0;
+    }
+}
+
 /*
 How many suitable free suballocations to analyze before choosing best one.
 - Set to 1 to use First-Fit algorithm - first suitable free suballocation will
@@ -5176,6 +5197,7 @@ void VmaBlockVector::GetPoolStats(VmaPoolStats* pStats)
     pStats->unusedSize = 0;
     pStats->allocationCount = 0;
     pStats->unusedRangeCount = 0;
+    pStats->unusedRangeSizeMax = 0;
 
     VmaMutexLock lock(m_Mutex, m_hAllocator->m_UseMutex);
 
@@ -5191,6 +5213,7 @@ void VmaBlockVector::GetPoolStats(VmaPoolStats* pStats)
         pStats->unusedSize += pBlock->m_SumFreeSize;
         pStats->allocationCount += rangeCount - pBlock->m_FreeCount;
         pStats->unusedRangeCount += pBlock->m_FreeCount;
+        pStats->unusedRangeSizeMax = VMA_MAX(pStats->unusedRangeSizeMax, pBlock->GetUnusedRangeSizeMax());
     }
 }