[jira] Resolved: (HARMONY-3745) [drlvm][gc][jit] server.emconf should be unified both for gc_cc and gc_gen

["Mikhail Fursov (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HARMONY-3745?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mikhail Fursov resolved HARMONY-3745.
-------------------------------------

    Resolution: Won't Fix
      Assignee: Mikhail Fursov

Every GC implementation is allowed to have a set of specific options that affect performance. 

The 'server' mode is not default mode and oriented to performance. The 'server.emconf' file is a configuration file for 'server' mode that contains all options specific for active components. So, instead of unifying all of options between different GC implementation (in general it's impossible) it's better to support different EM configuration files if needed.

> [drlvm][gc][jit] server.emconf should be unified both for gc_cc and gc_gen
> --------------------------------------------------------------------------
>
>                 Key: HARMONY-3745
>                 URL: https://issues.apache.org/jira/browse/HARMONY-3745
>             Project: Harmony
>          Issue Type: Improvement
>          Components: DRLVM
>            Reporter: Sergey Kuksenko
>            Assignee: Mikhail Fursov
>
> Currently, it is impossible to use -Xem:server mode in case of gc_gen turn on.
> server.emconf should be modified for gc_gen usage.
> Modification is  simple -change all "gc_cc" substrings into "gc_gen". But it is more convinient to have unified emconf file in both cases.
> All gc versions dependences are related  to allocation helpers inline.
> 1) setup class name where allocation helpers are existed.
> -XDjit.SD2_OPT.arg.optimizer.inline_helpers.newObj_className=org/apache/harmony/drlvm/gc_cc/GCHelper
> gc_cc's helpers are in "gc_cc"  package and gc_gen's in "gc_gen" respectively.
> Usage "gc" package will solve problem here.
> 2) other two prorties set up which class from which jar-file should be used.
> -Dvm.components.gc_cc.startupclass=org.apache.harmony.drlvm.gc_cc.GCHelper
> -XDvm.component.classpath.gc_cc=gc_cc.jar
> Storing such properties in emconf file is a source of misconfigurations and errors.
> Component related properties should be set at moment of library initialization by the library itself.

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