Linux Cache 机制 了cache miss,那么必定会有一个cacheline大小的内存区域,被取到cache中相应的cacheline。 现代处理器,一般将cache分为2~3级,L1, L2, L3。L1一般为CPU专有...于全局数据,可以放在.data段 有一些在多处理器体系结构下的关键数据结构,就是用cacheline_aligned来声明的,譬如: 这样能够避免每个...
This works only if ipc_rcu_alloc returns cacheline aligned pointers. vmalloc and kmalloc return cacheline algined pointers, the implementation of ipc_rcu_alloc breaks that. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Manfred Spraul <manfred@colorfullife.com> Cc: Rik van ...
At 102, execution of the Cache Line Demote instruction (e.g., CLDEMOTE) takes an address (e.g., 64 byte aligned) as an input, an uncore registers this address and the uncore opportunistically demotes content of a cache line associated with the address (e.g., cache line (M)) to ...
In this section, we evaluate our cache-line conflict simulator, C2Sim, using a typical x86_64 Linux server running CentOS 6.7 with two of Intel Xeon E5-2680 CPUs. We implement C2Sim on the top of Pin tool set [9]. For the baseline cache simulation, we set up the same configuration a...
Cache-Aligned Data Buffers Context: Your application/driver caches packet buffers and buffer descriptors. Problem: You need to use the cache as effectively as possible. On some systems, the descriptors might be larger than a cache line. Solution: Allocate key data on cache line boundaries. This...
The core part of C2Sim is similar to the algo- rithm used in cachegrind [1,11], which models SA caches, aligned and unaligned memory accesses and true LRU replacement policy on the top of a dynamic binary translator. In addition to the model found in cachegrind, we implement mechanisms ...