Le 12/29/2014 11:29 PM, neubyr a écrit :
How does Ganglia calculate proc_total? It doesn't match with simple 'ps
-ef' output so I am wondering how does it calculate number of resident
processes. Any explanation on proc_total measurement will be helpful.
thanks,
- N
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Hi,
Maybe it can help:
https://github.com/ganglia/monitor-core/blob/19e6eaee5458c2938b2509b27b2840bd46d888e7/libmetrics/linux/metrics.c
g_val_t
proc_total_func ( void )
{
char *p;
g_val_t val;
p = update_file(&proc_loadavg);
p = skip_token(p);
p = skip_token(p);
p = skip_token(p);
p = skip_whitespace(p);
while ( isdigit(*p) )
p++;
p++; /* skip the slash-/ */
val.uint32 = strtol( p, (char **)NULL, 10 );
return val;
}
It read /proc/loadavg, for an explanation of the file "/proc/loadavg" you can
take a look here:
http://man7.org/linux/man-pages/man5/proc.5.html
I hope it will be helpful.
Best Regards,
PREVOST Ludovic.
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hub for all things parallel software development, from weekly thought
leadership blogs to news, videos, case studies, tutorials and more. Take a
look and join the conversation now. http://goparallel.sourceforge.net
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