7188176: The JVM should differentiate between T and M series and adjust GC ergonomics

Mon, 24 Sep 2012 11:07:03 -0700

author
twisti
date
Mon, 24 Sep 2012 11:07:03 -0700
changeset 4108
3a327d0b8586
parent 4106
7eca5de9e0b6
child 4109
f7c1f489db55

7188176: The JVM should differentiate between T and M series and adjust GC ergonomics
Reviewed-by: kvn
Contributed-by: Tao Mao <tao.mao@oracle.com>

src/cpu/sparc/vm/vm_version_sparc.cpp file | annotate | diff | comparison | revisions
src/cpu/sparc/vm/vm_version_sparc.hpp file | annotate | diff | comparison | revisions
     1.1 --- a/src/cpu/sparc/vm/vm_version_sparc.cpp	Thu Sep 20 16:49:17 2012 +0200
     1.2 +++ b/src/cpu/sparc/vm/vm_version_sparc.cpp	Mon Sep 24 11:07:03 2012 -0700
     1.3 @@ -339,7 +339,11 @@
     1.4  
     1.5  unsigned int VM_Version::calc_parallel_worker_threads() {
     1.6    unsigned int result;
     1.7 -  if (is_niagara_plus()) {
     1.8 +  if (is_M_series()) {
     1.9 +    // for now, use same gc thread calculation for M-series as for niagara-plus
    1.10 +    // in future, we may want to tweak parameters for nof_parallel_worker_thread
    1.11 +    result = nof_parallel_worker_threads(5, 16, 8);
    1.12 +  } else if (is_niagara_plus()) {
    1.13      result = nof_parallel_worker_threads(5, 16, 8);
    1.14    } else {
    1.15      result = nof_parallel_worker_threads(5, 8, 8);
     2.1 --- a/src/cpu/sparc/vm/vm_version_sparc.hpp	Thu Sep 20 16:49:17 2012 +0200
     2.2 +++ b/src/cpu/sparc/vm/vm_version_sparc.hpp	Mon Sep 24 11:07:03 2012 -0700
     2.3 @@ -1,5 +1,5 @@
     2.4  /*
     2.5 - * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
     2.6 + * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
     2.7   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
     2.8   *
     2.9   * This code is free software; you can redistribute it and/or modify it
    2.10 @@ -124,6 +124,8 @@
    2.11    // Returns true if the platform is in the niagara line (T series)
    2.12    // and newer than the niagara1.
    2.13    static bool is_niagara_plus()         { return is_T_family(_features) && !is_T1_model(_features); }
    2.14 +
    2.15 +  static bool is_M_series()             { return is_M_family(_features); }
    2.16    static bool is_T4()                   { return is_T_family(_features) && has_cbcond(); }
    2.17  
    2.18    // Fujitsu SPARC64

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