一、Mapping Functions 二、Persistently mapped memory(永久Mapping) 三、Cache flush and invalidate 四、检查内存是否可Mapping 总结 前言 本文为Vulkan® Memory Allocator系列系列教程,定时更新,请大家关注。如果需要深入学习Vulkan的同学,可以点击课程链接,学习链接: 腾讯课堂:《Vulkan原理与实战—铸造渲染核武器—基石...
accesses to the appropriate subset of the last-level caches when, for example, some of the last-level caches are 'off.' The chip controls the power consumption by turning on and off cache slices based on power states, and consequently dynamically switches among at least two hash functions.Pat...
In Direct mapped cache memory, each block mapped to exactly one location in cache memory. A particular block of main memory can map the line number of cache is given by - Cache line number = (Block Address of Main Memory) modulo (Number of lines in Cache). ...
你就得在CPU端读取之前,调用invalidate cache操作;在CPU写入数据后,进行flush cache操作(CPU的Cache到主存RAM都会有一些延迟)。Map/UnMap并不会自动的执行相关操作。所以Vulkan提供了vkFlushMappedMemoryRanges(),vkInvalidateMappedMemoryRanges()作为CPU写入/CPU读取相关的刷新函数。VMA提供了更为方便的接口vmaFlushAllocati...
Sets all pages to be non-cacheable. Applications should not use this attribute except when explicitly required for a device. Using the interlocked functions with memory that is mapped withSEC_NOCACHEcan result in anEXCEPTION_ILLEGAL_INSTRUCTIONexception. ...
Memory Mapping
pkmap_count--- array in kernel 原型为:int pkmap_count[LAST_PKMAP]. The pkmap_count array includes LAST_PKMAP counters, one for each entry of the pkmap_page_table Page Table 用于记录counter。 1 The counteris0 The corresponding Page Table entrydoes not map any high-memory page frame andisu...
Sets all pages to be non-cacheable. Applications should not use this attribute except when explicitly required for a device. Using the interlocked functions with memory that is mapped with SEC_NOCACHE can result in an EXCEPTION_ILLEGAL_INSTRUCTION exception. SEC_NOCACHE requires either the SEC_...
Sets all pages to be non-cacheable. Applications should not use this attribute except when explicitly required for a device. Using the interlocked functions with memory that is mapped withSEC_NOCACHEcan result in anEXCEPTION_ILLEGAL_INSTRUCTIONexception. ...
A processor is disclosed that can map a request from a central processing unit that uses memory-mapped input-output space to a second processing domain, such as a multithreaded processing domain. A request addressed to the input-output space of the central processing unit is converted to a corr...