MMU gang wars: the TLB drive-by shootdown
The problem Every once in a while I get involuntarily dragged into heated debates about whether reusing memory is better for performance than freeing it. TLDR: it is. If you want to find out why read on. Also, read on if your application maintains a transaction log or writes events to a journal. Now, I like to follow other systems performance specialists such as Martin Thompson or Brendan Gregg an
XPDS16: Keeping coherency on ARM - Julien Grall, ARM
XPDS16: Keeping coherency on ARM - Julien Grall, ARM The ARM architecture strongly recommends to use a break-before-make when changing translation table entries whenever certain conditions are met. Failing to do so may result in getting TLB conflicts or breaking the coherency. During this session, we will introduce break-before-make and when the code handling page tables should use it. We will als
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