lpar plugin: update commen t regarding poll_idle vs pool_busy

[collectd.git] / src / lpar.c

diff --git a/src/lpar.c b/src/lpar.c
index b9471fb..d25715e 100644 (file)
--- a/src/lpar.c
+++ b/src/lpar.c
@@ -241,9 +241,8 @@ static int lpar_read (void)
                double pool_busy_cpus;
 
                /* We're calculating "busy" from "idle" and the total number of
-                * CPUs, because according to Aurélien Reynaud using the "busy"
-                * member yields values that differ from the values produced by
-                * the LPAR command line tools. --octo */
+                * CPUs, because the "busy" member didn't exist in early versions
+                * of libperfstat. It was added somewhere between AIX 5.3 ML5 and ML9. */
                pool_idle_ns = lparstats.pool_idle_time - lparstats_old.pool_idle_time;
                pool_idle_cpus = NS_TO_TICKS ((double) pool_idle_ns) / (double) ticks;
                pool_busy_cpus = ((double) lparstats.phys_cpus_pool) - pool_idle_cpus;