| Re: [rdf4j-dev] Multithreaded access to the MemoryStore |
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Hmz, I get quite a few exceptions (java.lang.IllegalArgumentException: Input stream must not be 'null') when running the set of SHACL benchmarks… Is this expected behavior ? Or could this be because I’m running the tests from the command line (mvn -jar jmh-benchmarks.jar ?) and not inside a GUI ? Best regards Bart From: Bart Hanssens (BOSA)
Hi Håvard, Haven’t used multithread access to the memorystore yet… I do have access to a cheap “server” (consumer grade AMD Ryzen 5 3600 with 6c/12t) and JDK 17, so I’ll give that a spin. Best regards Bart From: rdf4j-dev <rdf4j-dev-bounces@xxxxxxxxxxx>
On Behalf Of Håvard Ottestad Hi, I’ve upgraded my laptop just a few days ago to a shiny new MacBook with 8+2 ARM cores. It’s a nice upgrade to my 9 year old MacBook with a quad core Intel processor. Things are definitely snappier, but I’m struggling to get much performance improvement when comparing single threaded SHACL validation to parallel validation. Profiler says that there are three major issues of overhead and contention are: - creating read locks - retrieving the mem-versions of values from the mem value store - keeping track of active iterators
Anyone else run into the same issues? Or someone with an 8+ core Intel/amd machine who would like to test it out? I’m using the benchmark linked below and not seeing much difference when enabling/disabling parallel validation. Cheers, Håvard |