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8 Some platforms may have multiple types of memory attached to a compute
17 CPUs, they may still be local to one or more compute nodes relative to
18 other nodes. The following diagram shows one such example of two compute
19 nodes with local memory and a memory only node for each of compute node::
21 +------------------+ +------------------+
22 | Compute Node 0 +-----+ Compute Node 1 |
24 +--------+---------+ +--------+---------+
26 +--------+---------+ +--------+---------+
28 +------------------+ +--------+---------+
36 performance when accessing a given memory target. Each initiator-target
48 # symlinks -v /sys/devices/system/node/nodeX/access0/targets/
49 relative: /sys/devices/system/node/nodeX/access0/targets/nodeY -> ../../nodeY
51 # symlinks -v /sys/devices/system/node/nodeY/access0/initiators/
52 relative: /sys/devices/system/node/nodeY/access0/initiators/nodeX -> ../../nodeX
82 # tree -P "read*|write*" /sys/devices/system/node/nodeY/access0/initiators/
84 |-- read_bandwidth
85 |-- read_latency
86 |-- write_bandwidth
87 `-- write_latency
116 L1, L2, L3) uses the CPU-side view where each increased level is lower
121 The memory-side caches are not directly addressable by software. When
140 a memory-side cache, or that information is not accessible to the kernel.
155 |-- index1
156 | |-- indexing
157 | |-- line_size
158 | |-- size
159 | `-- write_policy
161 The "indexing" will be 0 if it is a direct-mapped cache, and non-zero
162 for any other indexed based, multi-way associativity.
169 The "write_policy" will be 0 for write-back, and non-zero for
170 write-through caching.
176 - Section 5.2.27