> Take a look at the pyth_metric_init() function in the mod_python.c module.
> At the end of the function, mod_python takes all of the metric definitions
> and pushes them into an APR array. Then it sets the metric_info field of the
> module structure with the metric_info->elts value.
>
> python_module.metrics_info = (Ganglia_25metric *)metric_info->elts;
>
> Basically it is just a matter of calling the APR function
> apr_array_push(metric_info); for each metric definition and then filling in
> the structure that is returned.
>
> Brad
>
Thanks Brad,
I went through that function you mentioned- if I understood it right-
that function adds different metadata for different metrics. So for
example:
{0, "cpu_num", 1200, GANGLIA_VALUE_UNSIGNED_SHORT, "CPUs", "zero",
"%hu", UDP_HEADER_SIZE+8, "Total number of CPUs"},
{0, "cpu_speed", 1200, GANGLIA_VALUE_UNSIGNED_INT, "MHz", "zero",
"%u", UDP_HEADER_SIZE+8, "CPU Speed in terms of MHz"},
I guess this adds more metadata to say the cpu_speed metric. I don't
want to do that, All my metrics will have the same meta-data- its just
that I don't know how many metrics I will have at compile time. The
number of metrics will be determined at runtime by reading a file.
I was wondering if I could just run a loop and put in the metadata this way:
static Ganglia_25metric *mem_metric_info;
mem_metric_info= new Ganglia_25metric[num_of_metrics];
for (i=0 to <num_of_metrics){
mem_metric_info[i]= {0, some name, 1200,
GANGLIA_VALUE_UNSIGNED_SHORT, "CPUs", "zero", "%hu", DP_HEADER_SIZE+8,
"Total number of CPUs"},
}
Thanks again,
Sylvester
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