Cost of single-threaded nmethod hotness updates at each safepoint (in JDK 8) (original) (raw)

Bernd Eckenfels ecki at zusammenkunft.net
Fri Jul 31 21:44:45 UTC 2015

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Am Fri, 31 Jul 2015 12:07:18 -0700 schrieb Srinivas Ramakrishna <ysr1729 at gmail.com>:

sun.ci.codeCacheSweepsTotalNum=58 ... Notice that the code cache usage is less that 35 MB, for the 240 MB capacity, yet it seems we have had 58 sweeps already

I would also be interested in what causes this. Is this caused by System.gc maybe? (we do see sweeps and decreasing code cache usage on systems where no pressure should exist).

Gruss Bernd

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