class MWStatistics
This class serves as a holder for worker classes before they go to die
Public Methods
 void gather( void* )
 Literally, take the stats from this worker and store
them in the stats class
 void get_stats(double *average_bench, double *equivalent_bench, double *min_bench, double *max_bench, double *av_present_workers, double *av_nonsusp_workers, double *av_active_workers, double *equi_pool_performance, double *equi_run_time, double *parallel_performance, double *wall_time, MWList *workerlist )
 This function is just like makestats(), except it return the relative
statistics information to the caller
 void makestats()
 This method is called at the end of a run
 MWStatistics()
 Default constructor
 void read_checkpoint( FILE *cfp )
 Read in stats information across the checkpoint
 void update_best_bench_results( double bres )
 Everytime we get a new bench factor, we update the max and min ones if necessary
 void write_checkpoint( FILE *cfp, MWList *wlist )
 We find that we should save stats across checkpoints
 ~MWStatistics()
 Destructor...
Private Fields
 double* cputimes
 Array of times holding the CPU times of the workerIDs
 double* susptimes
 Array of times that the workerIDs have been suspended
 double* uptimes
 Array of times that the workerIDs have been "up"
 double* workingtimes
 Array of times that the workerIDs have been working
Private Methods
 int get_max_vid()
 What is the maximum "virtuid ID" that we ever assigned to a worker
 double mean( double *array, int length )
 Computes the mean of an array of number.
 double var( double *array, int length, int mean )
 Computes the variance of an array of numbers (given the mean,
to avoid "double processing" the list  which you don't need
to do anyway, but Mike wrote this function)
Private
 Normalized Statistics. MW computes "normalized" statistics

 double max_bench_result
 Min benchmark result  the "slowest" machine we ever had
 double min_bench_result
 Max benchmark result  the "faster" machine we ever had
 double* sumbenchmark
 The sum of benchmark factors for this vid
 int* numbenchmark
 The number of benchmar factors for this vid
Documentation
This class serves as a holder for worker classes before they go to die.
It holds the workers until a makestats() call is made, at which
point it generates some statistics, given the workers.
 MWStatistics()
 Default constructor
 ~MWStatistics()
 Destructor...
 void gather( void* )
 Literally, take the stats from this worker and store
them in the stats class. This is done when the worker
dies and during a checkpoint.
 void makestats()
 This method is called at the end of a run. It prints out some
statistical information on that run.
 void get_stats(double *average_bench, double *equivalent_bench, double *min_bench, double *max_bench, double *av_present_workers, double *av_nonsusp_workers, double *av_active_workers, double *equi_pool_performance, double *equi_run_time, double *parallel_performance, double *wall_time, MWList *workerlist )
 This function is just like makestats(), except it return the relative
statistics information to the caller
 void update_best_bench_results( double bres )
 Everytime we get a new bench factor, we update the max and min ones if necessary
 void write_checkpoint( FILE *cfp, MWList *wlist )
 We find that we should save stats across checkpoints. Here
we're given the ckpt FILE* and the list of running workers.
Basically, we write out the sum of the old stats we've got
plus the stats of the running workers.
 void read_checkpoint( FILE *cfp )
 Read in stats information across the checkpoint
 double* uptimes
 Array of times that the workerIDs have been "up"
 double* workingtimes
 Array of times that the workerIDs have been working
 double* cputimes
 Array of times holding the CPU times of the workerIDs
 double* susptimes
 Array of times that the workerIDs have been suspended
 Normalized Statistics. MW computes "normalized" statistics
 about the runs performance based on the relative speed of the machines
that the user obtained during the course of the run.
 double max_bench_result
 Min benchmark result  the "slowest" machine we ever had
 double min_bench_result
 Max benchmark result  the "faster" machine we ever had
 double* sumbenchmark
 The sum of benchmark factors for this vid
 int* numbenchmark
 The number of benchmar factors for this vid
 double mean( double *array, int length )
 Computes the mean of an array of number.
 double var( double *array, int length, int mean )
 Computes the variance of an array of numbers (given the mean,
to avoid "double processing" the list  which you don't need
to do anyway, but Mike wrote this function)
 int get_max_vid()
 What is the maximum "virtuid ID" that we ever assigned to a worker.
This amounts to asking how many workers did we ever have in ALL states
at any one time during the course of the run.
 This class has no child classes.
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