[infinispan-dev] CHM or CHMv8?

[Manik Surtani]

Whoops, my mistake, this *was* on JDK 7.

On 19 Apr 2013, at 04:11, Radim Vansa <rvansa at redhat.com> wrote:

> 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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--
Manik Surtani
manik at jboss.org
twitter.com/maniksurtani

Platform Architect, JBoss Data Grid
http://red.ht/data-grid