> It is observed that when running crypto benchmark with large number of > threads, a lot of time is spent on the synchronized block inside the > Provider.getService() method. The cause for this is that > Provider.getService() method first uses the 'serviceMap' field to find the > requested service. However, when the requested service is not supported by > this provider, e.g. requesting Cipher.RSA from SUN provider, the impl > continues to try searching the legacy registrations whose processing is > guarded by the "synchronized" keyword. When apps use getInstance() calls > without the provider argument, Provider class has to iterate through existing > providers trying to find one that supports the requested service. > > Now that the parent class of Provider no longer synchronizes all of its > methods, Provider class should follow suit and de-synchronize its methods. > Parsing of the legacy registration is done eagerly (at the time of put(...) > calls) instead of lazily (at the time of getService(...) calls). This also > makes "legacyStrings" redundant as the registration is parsed and stored > directly into "legacyMap". > > The bug reporter has confirmed that the changes resolve the performance > bottleneck and all regression tests pass. > > Please review and thanks in advance, > Valerie
Valerie Peng has updated the pull request incrementally with one additional commit since the last revision: Updated to use pattern matching with instanceof operator. ------------- Changes: - all: https://git.openjdk.java.net/jdk/pull/6513/files - new: https://git.openjdk.java.net/jdk/pull/6513/files/3124e14c..37dc1d9f Webrevs: - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=6513&range=01 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=6513&range=00-01 Stats: 34 lines in 1 file changed: 1 ins; 0 del; 33 mod Patch: https://git.openjdk.java.net/jdk/pull/6513.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/6513/head:pull/6513 PR: https://git.openjdk.java.net/jdk/pull/6513
