37 lines
1.2 KiB
Diff
37 lines
1.2 KiB
Diff
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diff --git a/src/lparstat.c b/src/lparstat.c
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index 31a4ee8..eebba1f 100644
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--- a/src/lparstat.c
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+++ b/src/lparstat.c
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@@ -492,6 +492,15 @@ void get_cpu_util_purr(struct sysentry *unused_se, char *buf)
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delta_purr = get_delta_value("purr");
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delta_idle_purr = get_delta_value("idle_purr");
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+ /*
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+ * Given that these values are read from different
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+ * sources (purr from lparcfg and idle_purr from sysfs),
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+ * a small variation in the values is possible.
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+ * In such cases, round down delta_idle_purr to delta_purr.
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+ */
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+ if (delta_idle_purr > delta_purr)
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+ delta_idle_purr = delta_purr;
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+
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physc = (delta_purr - delta_idle_purr) / delta_tb;
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physc *= 100.00;
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@@ -507,6 +516,15 @@ void get_cpu_idle_purr(struct sysentry *unused_se, char *buf)
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delta_purr = get_delta_value("purr");
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delta_idle_purr = get_delta_value("idle_purr");
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+ /*
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+ * Given that these values are read from different
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+ * sources (purr from lparcfg and idle_purr from sysfs),
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+ * a small variation in the values is possible.
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+ * In such cases, round down delta_idle_purr to delta_purr.
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+ */
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+ if (delta_idle_purr > delta_purr)
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+ delta_idle_purr = delta_purr;
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+
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physc = (delta_purr - delta_idle_purr) / delta_tb;
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idle = (delta_purr / delta_tb) - physc;
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idle *= 100.00;
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