[infinispan-dev] CHM or CHMv8?

[Radim Vansa]

Do you have the numbers for JDK 7 as well?

Radim

----- Original Message -----
| From: "Manik Surtani" <msurtani at redhat.com>
| To: "infinispan -Dev List" <infinispan-dev at lists.jboss.org>
| Sent: Friday, April 19, 2013 4:35:53 AM
| Subject: [infinispan-dev] CHM or CHMv8?
| 
| Guys,
| 
| Based on some recent micro benchmarks I've been doing, I've seen:
| 
| MapStressTest configuration: capacity 100000, test running time 60 seconds
| Testing mixed read/write performance with capacity 100,000, keys 300,000,
| concurrency level 32, threads 12, read:write ratio 0:1
| Container CHM           Ops/s 21,165,771.67  Gets/s       0.00  Puts/s
| 21,165,771.67  HitRatio     100.00  Size    262,682  stdDev 77,540.73
| Container CHMV8         Ops/s 33,513,807.09  Gets/s       0.00  Puts/s
| 33,513,807.09  HitRatio     100.00  Size    262,682  stdDev 77,540.73
| 
| So under high concurrency (12 threads, on my workstation with 12 hardware
| threads - so all threads are always working), we see that Infinispan's CHMv8
| implementation is 50% faster than JDK6's CHM implementation when doing puts.
| 
| We use a fair number of CHMs all over Infinispan's codebase.  By default,
| these are all JDK-provided CHMs.  But we have the option to switch to our
| CHMv8 implementation by passing in -Dinfinispan.unsafe.allow_jdk8_chm=true.
| 
| The question is, should this be the default?  Thoughts, opinions?
| 
| - M
| 
| --
| Manik Surtani
| manik at jboss.org
| twitter.com/maniksurtani
| 
| Platform Architect, JBoss Data Grid
| http://red.ht/data-grid
| 
| 
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