Answer by harold for What's the actual effect of successful unaligned...
On some Intel micro-architectures, a load that is split by a cacheline boundary takes a dozen cycles longer than usual, and a load that is split by a page boundary takes over 200 cycles longer. It's...
View ArticleAnswer by Analog File for What's the actual effect of successful unaligned...
In general estimating speed on modern processors is extremely complicated. This is true not only for unaligned accesses but in general.Modern processors have pipelined architectures, out of order and...
View ArticleAnswer by Necrolis for What's the actual effect of successful unaligned...
It depends on the instruction(s), for most x86 SSE load/store instructions (excluding unaligned variants), it will cause a fault, which means it'll probably crash your program or lead to lots of round...
View ArticleWhat's the actual effect of successful unaligned accesses on x86?
I always hear that unaligned accesses are bad because they will either cause runtime errors and crash the program or slow memory accesses down. However I can't find any actual data on how much they...
View Article
