src/hotspot/share/memory/metaspace/metaspaceDCmd.cpp

rev 49870 : 8201572: Improve Metaspace reporting
Reviewed-by:

*** 21,36 ****
   * questions.
   *
   */
  #include "precompiled.hpp"
  #include "memory/metaspace.hpp"
  #include "services/diagnosticCommand.hpp"
  
! MetaspaceDCmd::MetaspaceDCmd(outputStream* output, bool heap): DCmd(output, heap) {
  }
  
  void MetaspaceDCmd::execute(DCmdSource source, TRAPS) {
!   const size_t scale = 1 * K;
!   VM_PrintMetadata op(output(), scale);
    VMThread::execute(&op);
  }
  
--- 21,100 ----
   * questions.
   *
   */
  #include "precompiled.hpp"
  #include "memory/metaspace.hpp"
+ #include "memory/metaspace/metaspaceDCmd.hpp"
+ #include "memory/resourceArea.hpp"
  #include "services/diagnosticCommand.hpp"
+ #include "services/nmtCommon.hpp"
  
! namespace metaspace {
! 
! MetaspaceDCmd::MetaspaceDCmd(outputStream* output, bool heap)
!   : DCmdWithParser(output, heap)
!   , _basic("basic", "Prints a basic summary (does not need a safepoint).", "BOOLEAN", false, "false")
!   , _show_loaders("show-loaders", "Shows usage by class loader.", "BOOLEAN", false, "false")
!   , _by_chunktype("by-chunktype", "Break down numbers by chunk type.", "BOOLEAN", false, "false")
!   , _by_spacetype("by-spacetype", "Break down numbers by loader type.", "BOOLEAN", false, "false")
!   , _show_vslist("vslist", "Shows details about the underlying virtual space.", "BOOLEAN", false, "false")
!   , _show_vsmap("vsmap", "Shows chunk composition of the underlying virtual spaces", "BOOLEAN", false, "false")
!   , _scale("scale", "Memory usage in which to scale. Valid values are: 1, KB, MB or GB (fixed scale) "
!            "or \"dynamic\" for a dynamically choosen scale.",
!      "STRING", false, "dynamic")
! {
!   _dcmdparser.add_dcmd_option(&_basic);
!   _dcmdparser.add_dcmd_option(&_show_loaders);
!   _dcmdparser.add_dcmd_option(&_by_chunktype);
!   _dcmdparser.add_dcmd_option(&_by_spacetype);
!   _dcmdparser.add_dcmd_option(&_show_vslist);
!   _dcmdparser.add_dcmd_option(&_show_vsmap);
!   _dcmdparser.add_dcmd_option(&_scale);
! }
! 
! int MetaspaceDCmd::num_arguments() {
!   ResourceMark rm;
!   MetaspaceDCmd* dcmd = new MetaspaceDCmd(NULL, false);
!   if (dcmd != NULL) {
!     DCmdMark mark(dcmd);
!     return dcmd->_dcmdparser.num_arguments();
!   } else {
!     return 0;
!   }
  }
  
  void MetaspaceDCmd::execute(DCmdSource source, TRAPS) {
!   // Parse scale value.
!   const char* scale_value = _scale.value();
!   size_t scale = 0;
!   if (scale_value != NULL) {
!     if (strcasecmp("dynamic", scale_value) == 0) {
!       scale = 0;
!     } else {
!       scale = NMTUtil::scale_from_name(scale_value);
!       if (scale == 0) {
!         output()->print_cr("Invalid scale: \"%s\". Will use dynamic scaling.", scale_value);
!       }
!     }
!   }
!   if (_basic.value() == true) {
!     if (_show_loaders.value() || _by_chunktype.value() || _by_spacetype.value() ||
!         _show_vslist.value() || _show_vsmap.value()) {
!       // Basic mode. Just print essentials. Does not need to be at a safepoint.
!       output()->print_cr("In basic mode, additional arguments are ignored.");
!     }
!     MetaspaceUtils::print_basic_report(output(), scale);
!   } else {
!     // Full mode. Requires safepoint.
!     int flags = 0;
!     if (_show_loaders.value())         flags |= MetaspaceUtils::rf_show_loaders;
!     if (_by_chunktype.value())         flags |= MetaspaceUtils::rf_break_down_by_chunktype;
!     if (_by_spacetype.value())         flags |= MetaspaceUtils::rf_break_down_by_spacetype;
!     if (_show_vslist.value())          flags |= MetaspaceUtils::rf_show_vslist;
!     if (_show_vsmap.value())           flags |= MetaspaceUtils::rf_show_vsmap;
!     VM_PrintMetadata op(output(), scale, flags);
      VMThread::execute(&op);
+   }
  }
  
+ } // namespace metaspace
+