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wdfk-prog avatar wdfk-prog commented on June 15, 2024
  • 查看slab_tc 测试用例发现内存只开了1MB;但是按照我的分析应该是不对劲的;
  • 我本地没有环境测试slab,所以无法证明了

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wdfk-prog avatar wdfk-prog commented on June 15, 2024
  • 查看slab_tc 测试用例发现内存只开了1MB;但是按照我的分析应该是不对劲的;
  • 我本地没有环境测试slab,所以无法证明了
  • 使用slab_tc 测试了一下;
  • limsize = RT_ALIGN(limsize, RT_MM_PAGE_SIZE); 虽然是会向上分配
  • slab->memusage = rt_slab_page_alloc((rt_slab_t)(&slab->parent), limsize / RT_MM_PAGE_SIZE);
  • 这句代码会将limsize / RT_MM_PAGE_SIZE;
  • 所以如果所需的memusage大小不够一页,那就按照一页分配的意思;
  • 所以之前的计算是错误的;应该来说内存起码有一页的空间分配给内存信息,初始化就是正常的

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