Messages in this thread | | | From | Jirka Hladky <> | Date | Wed, 22 Jun 2016 11:52:45 +0200 | Subject | Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and SPECjvm2008 benchmarks against 4.6 kernel |
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Hi Peter,
the performance regression has been caused by this commit
================================================= commit 6ecdd74962f246dfe8750b7bea481a1c0816315d Author: Yuyang Du <yuyang.du@intel.com> Date: Tue Apr 5 12:12:26 2016 +0800
sched/fair: Generalize the load/util averages resolution definition =================================================
Could you please have a look?
Thanks a lot! Jirka
On Wed, Jun 22, 2016 at 9:54 AM, Peter Zijlstra <peterz@infradead.org> wrote: > On Wed, Jun 22, 2016 at 09:49:41AM +0200, Peter Zijlstra wrote: >> On Wed, Jun 22, 2016 at 09:16:01AM +0200, Peter Zijlstra wrote: >> > WTF a benchmark needs that crap is beyond me, but whatever, I have >> > numbers. >> >> Oh, shaft me harder, its XML shite :/ How is a sane person ever going to >> get numbers out. >> >> I'm >.< close to giving up on this site and declaring the thing >> -EDONTCARE. > > OK, done.. have a look at this: > > > /tmp/SPECjvm2008/compiler.compiler/compiler/src/share/classes/javax/lang/model/element/Name.java:54: cannot access java.lang.CharSequence > bad class file: spec.benchmarks.compiler.SpecFileManager$CachedFileObject@1c06fce6 > bad constant pool tag: 18 at 10 > Please remove or make sure it appears in the correct subdirectory of the classpath. > public interface Name extends CharSequence { > ^ > ERROR: compiler exit code: 1 > > Warmup (120s) begins: Wed Jun 22 09:45:33 CEST 2016 > /tmp/SPECjvm2008/compiler.compiler/compiler/src/share/classes/javax/lang/model/element/Name.java:54: cannot access java.lang.CharSequence > bad class file: spec.benchmarks.compiler.SpecFileManager$CachedFileObject@1c06fce6 > bad constant pool tag: 18 at 10 > Please remove or make sure it appears in the correct subdirectory of the classpath. > public interface Name extends CharSequence { > ^ > /tmp/SPECjvm2008/compiler.compiler/compiler/src/share/classes/javax/lang/model/element/Name.java:54: cannot access java.lang.CharSequence > bad class file: spec.benchmarks.compiler.SpecFileManager$CachedFileObject@1c06fce6 > bad constant pool tag: 18 at 10 > Please remove or make sure it appears in the correct subdirectory of the classpath. > > > > Clearly this stuff just isn't made to be used. > > > /me goes do something useful.
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