int numa_run_on_node(int node); int numa_run_on_node_mask(struct bitmask *nodemask); int numa_run_on_node_mask_all(struct bitmask *nodemask); struct bitmask *numa_get_run_node_mask(void); void numa_tonode_memory(void *start, size_t size, int node); void numa_tonodemask_...
gfp_mask, order); } static inline struct page * __alloc_pages_node(int nid, gfp_t gfp_mask, unsigned int order) { // 校验指定的 NUMA 节点 ID 是否合法,不要越界 VM_BUG_ON(nid < 0 || nid >= MAX_NUMNODES); // 指定节点必须是有效在线的 VM_...
1. nodemask_set(&mask, maxnode); /* set node highest */ 2. if (nodemask_isset(&mask, 1)) { /* is node 1 set? */ 3. ... 4. } 5. nodemask_clr(&mask, maxnode); /* clear highest node again */ 1. 2. 3. 4. 5. 这里有两个预设的nodemask:numa_all_nodes代表系统中所有的...
我们将直接连接的 CPU core 和内存和其他外设(如网卡、GPU)称为一个 NUMA domain(或 NUMA node),在同一个 domain 中(intra-domain)的访存性能(包括带宽和延迟)通常显著高于跨 NUMA(inter-domain)的性能,这种现象被称为 NUMA 效应。 事实上,现代处理器的 NUMA domain 划分并不只到 socket 粒度,可以继续细分出...
/usr/share/man/man3/numa_run_on_node_mask.3.gz /usr/share/man/man3/numa_set_bind_policy.3.gz /usr/share/man/man3/numa_set_interleave_mask.3.gz /usr/share/man/man3/numa_set_localalloc.3.gz /usr/share/man/man3/numa_set_membind.3.gz ...
/* numa_run_on_node_mask is not tested */ }void usage(void) { int i; printf("usage: numademo [-S] [-f] [-c] [-e] [-t] msize[kmg] {tests}\nNo tests means run all.\n"); printf("-c output CSV data. -f run even without NUMA API. -S run stupid tests. -e exit ...
bind 在一系列特定的numa node上分配内存 interleave 在一系列numa node上分配交错内存 preferred 优先在某个numa node上分配内存 bind与prefered区别是,在特定numa node上分配内存失败时,bind策略会直接报错返回失败信息,而preferred策略会回滚,再到其他的numa node上分配内存。使用bind策略会由于swapping,导致早期内存不...
void numa_warn(int /*number*/, char * /*fmt*/, ...) { std::terminate(); } auto * mask = numa_bitmask_alloc(std::numeric_limits<unsigned int>::max()); numa_bitmask_setbit(mask, std::numeric_limits<unsigned int>::max() - 1); numa_run_on_node_mask(mask); // Should trigg...
To ensure that all threads for your process run on the same node, use the SetProcessAffinityMask function with a process affinity mask that specifies processors in the same node. This increases the efficiency of applications whose threads need to access the same memory. Alternatively, to limit ...
$node_max ]; then echo "Process running on cpu $running_on_cpu but expected to run on cpu $cpus_list" kill -USR1 $pid >/dev/null 2>&1 return fi kill -USR1 $pid >/dev/null 2>&1 done done echo "PASS NUMA local node and memory affinity"...