CPU Cache Topologie mit likwid anzeigen
Aus Wiki Thomas-Krenn.AG
likwid ist ein Linux Toolsammlung zur Unterstützung von Entwicklern von HPC und Multi-threaded Software. Mit dem Kommando likwid-topology lässt sich dabei die Cache Topologie anzeigen.
Beispiel
Beispiel eines single-socket Dual-Core Mobil Prozessors (Intel Core i7 CPU M 620, 2.67GHz)
user@ubuntu-10-10:~$ /usr/local/bin/likwid-topology -g ------------------------------------------------------------- CPU type: Intel Core Westmere processor ************************************************************* Hardware Thread Topology ************************************************************* Sockets: 1 Cores per socket: 2 Threads per core: 2 ------------------------------------------------------------- HWThread Thread Core Socket 0 0 0 0 1 1 0 0 2 0 2 0 3 1 2 0 ------------------------------------------------------------- Socket 0: ( 0 1 2 3 ) ------------------------------------------------------------- ************************************************************* Cache Topology ************************************************************* Level: 1 Size: 32 kB Cache groups: ( 0 1 ) ( 2 3 ) ------------------------------------------------------------- Level: 2 Size: 256 kB Cache groups: ( 0 1 ) ( 2 3 ) ------------------------------------------------------------- Level: 3 Size: 4 MB Cache groups: ( 0 1 2 3 ) ------------------------------------------------------------- ************************************************************* NUMA Topology ************************************************************* NUMA domains: 1 ------------------------------------------------------------- Domain 0: Processors: 0 1 2 3 Memory: 2045.05 MB free of total 3955.61 MB ------------------------------------------------------------- ************************************************************* Graphical: ************************************************************* Socket 0: +---------------------+ | +-------+ +-------+ | | | 0 1 | | 2 3 | | | +-------+ +-------+ | | +-------+ +-------+ | | | 32kB | | 32kB | | | +-------+ +-------+ | | +-------+ +-------+ | | | 256kB | | 256kB | | | +-------+ +-------+ | | +-----------------+ | | | 4MB | | | +-----------------+ | +---------------------+
Weitere Informationen
- likwid (Projektseite bei Google Code)
- Performance-oriented programming on multicore-based Clusters with MPI, OpenMP, and hybrid MPI/OpenMP (Inhalte des Full-Day Tutorial der ISC-2011)
- LIKWID: A lightweight performance-oriented tool suite for x86 multicore environments.
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