singa::Trainer::ParamInfo Class Reference

ParamInfo is used to construct a parameter shard. More...

#include <trainer.h>

Public Member Functions
	ParamInfo (shared_ptr< Param > p, int local, int owner)
void	AddParam (shared_ptr< Param > p, int local, int owner)
	Associate the counter to a Param object. More...

Public Attributes
int	num_update
int	next_version
	all counters are atomic
int	num_local
	local workers uses the shared parameter
int	num_total
	total workers uses the shared parameter
int	owner_procs
	the procs id of the worker that owns the parameter
vector< shared_ptr< Param > >	shares

Detailed Description

ParamInfo is used to construct a parameter shard.

For each worker group: Every unique Param object is associated with a ParamCounter object whose param field points the to Param object itself.

Param objects sharing the same values (due to data parallelism) are associated with the same ParamCounter whose param field also shares the same values.

Usage: we need to aggregate gradients from all workers for the shared parameters before sending the update request. The nUpdate counter counts the number.

TODO test with different physical architectures.

Member Function Documentation

void singa::Trainer::ParamInfo::AddParam ( shared_ptr< Param >  p, int  local, int  owner  )

inline

Associate the counter to a Param object.

Parameters

p
local	1 if this Param object is used by workers in this procs, 0 otherwise
owner	the procs id of the worker who ownes this Param object

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

• /home/wangwei/program/asf/incubator-singa/include/trainer/trainer.h