foedus::memory::ScopedNumaPreferred Struct Reference

Automatically sets and resets numa_set_preferred(). More...

Detailed Description

Automatically sets and resets numa_set_preferred().

Use this in a place you want to direct all memory allocation to a specific NUMA node.

Definition at line 58 of file memory_id.hpp.

#include <memory_id.hpp>

Public Member Functions
	ScopedNumaPreferred (int numa_node, bool retain_old=false)
	~ScopedNumaPreferred ()

Public Attributes
int	old_value_
bool	numa_enabled_

Constructor & Destructor Documentation

foedus::memory::ScopedNumaPreferred::ScopedNumaPreferred ( int  numa_node, bool  retain_old = false  )

inline

Definition at line 59 of file memory_id.hpp.

References foedus::assorted::mod_numa_node(), numa_available(), numa_enabled_, numa_preferred(), numa_set_preferred(), and old_value_.

                                                              {
    // if the machine is not a NUMA machine (1-socket), then avoid calling libnuma functions.
    numa_enabled_ = (::numa_available() >= 0);
    if (!numa_enabled_) {
      numa_node = 0;
      return;
    }
    if (retain_old) {
      old_value_ = ::numa_preferred();
    } else {
      old_value_ = -1;
    }
    // in order to run even on a non-numa machine or a machine with fewer sockets,
    // we allow specifying arbitrary numa_node. we just take rem.
    numa_node = assorted::mod_numa_node(numa_node);
    ::numa_set_preferred(numa_node);
  }

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foedus::memory::ScopedNumaPreferred::~ScopedNumaPreferred ( )

inline

Definition at line 76 of file memory_id.hpp.

References numa_enabled_, numa_set_preferred(), and old_value_.

                         {
    if (numa_enabled_) {
      ::numa_set_preferred(old_value_);
    }
  }

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Member Data Documentation

bool foedus::memory::ScopedNumaPreferred::numa_enabled_

Definition at line 82 of file memory_id.hpp.

Referenced by ScopedNumaPreferred(), and ~ScopedNumaPreferred().

int foedus::memory::ScopedNumaPreferred::old_value_

Definition at line 81 of file memory_id.hpp.

Referenced by ScopedNumaPreferred(), and ~ScopedNumaPreferred().

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The documentation for this struct was generated from the following file:

• /home/shino/foedus_code/foedus-core/include/foedus/memory/memory_id.hpp