I have filed bug 114
<http://bugzilla.ganglia.info/cgi-bin/bugzilla/show_bug.cgi?id=114>. I
have also provided a patch.
The jist of the bug is that we have these new machines, with new
versions of redhat, that scale the processor speeds like laptops do, in
order to preserve power. gmond reports the speeds of the cpu's on these
machines way too low because they are idle when gmond is started.
The patch is to display the maximum frequency for one of the machine's
processor, instead of using what is (mis)reported in /proc/cpuinfo. With
the frequency scaling feature enabled on multi cpu machines, it is
possible for one processor to have a different speed than the others in
the machine. The question I have for developers is what should gmond
display about the cpu speeds? Should it display:
1. the maximum speed for all processors [1 number]
2. the current speed for all processors [1 meaningless number]
3. both the maximum and current speed for all processors [2 numbers]
4. the maximum speed for each processor [n x 1 numbers(s)]
5. the current speed for each processor [n x 1 number(s)]
6. the current and maximum speed for each processor [n x 2 numbers]
7. other (display the frequency range)
My vote is for #1, because its the easiest to code and simplest to
understand. Sometime in the future we may have machines that have
multiple processors with different max speeds. I'm not really asking for
your vote though, more for your opinions. I don't really see this as a
big issue, but one that should be considered.
Thanks,
Ian C
