Hi, I was a bit surprised when Ganglia reported that a couple of my clusters have a grand total of zero CPUs.
Seems monitor-core/gmond/machines/linux.c uses a buggy method to determine the number of processors in a x86 machine; it counts the number of lines starting with "cpu" in /proc/stat and subtracts one. Works fine for 2.4 kernels, breaks for 2.2 kernels on single-CPU machines. In the latter case, /proc/stat only contains a single "cpu" line. A tentative fix would be to instead count the number of lines starting with "processor" in /proc/cpuinfo. Comments, anyone? -- Leif Nixon Systems expert ------------------------------------------------------------ National Supercomputer Centre Linkoping University ------------------------------------------------------------
