hg: code-tools/jmh: 7901461: perfnorm: do not report CPI=NaN when not enough counters are available

[aleksey.shipilev at oracle.com]

Changeset: e801861b0f09
Author:    shade
Date:      2015-07-08 00:30 +0300
URL:       http://hg.openjdk.java.net/code-tools/jmh/rev/e801861b0f09

7901461: perfnorm: do not report CPI=NaN when not enough counters are available

! jmh-core/src/main/java/org/openjdk/jmh/profile/LinuxPerfNormProfiler.java