[RFC] Adding dtrace probe points for more detailed GC information
Lukas Berk
lberk at redhat.com
Wed Aug 29 13:16:41 UTC 2012
Hey List,
I have a slightly updated patch, splitting collections into begin/end
probe points where possible. I've also attached the systemtap tapset
I've been using for reference (please note that this patch should work
without systemtap dependencies, and as-is with dtrace).
This patch features probe points for:
- Mark Sweep Collections and compactions
- Parallel Collections
- G1 collections
- Object moves
- Tenured Collections
- Parallel Scavenges
Any comments regarding the patch would be appreciated. Is there
anything I can do try and get these changes commited to openjdk?
Cheers,
Lukas
* Lukas Berk <lberk at redhat.com> [2012-07-19 19:04]:
> Thanks for the feedback I've gotten, I've updated my patch, adding in
> scavenges, as well as looked into
> collect_in_foregroud/collect_in_background which I've added in invoke().
> Where applicable I've also added the gc_cause for collections.
>
> I'll still add probe points for collecting permanent generations if
> needed, however due to the plan to remove them I've held off on adding
> them for now. Any comments on the patch would be appreciated.
>
> Thanks,
>
> Lukas
-------------- next part --------------
+--- openjdk.orig/hotspot/src/share/vm/compiler/oopMap.cpp 2012-06-26 09:24:22.390325184 -0400
++++ openjdk/hotspot/src/share/vm/compiler/oopMap.cpp 2012-07-06 10:12:44.981413003 -0400
+@@ -33,9 +33,13 @@
+ #include "memory/resourceArea.hpp"
+ #include "runtime/frame.inline.hpp"
+ #include "runtime/signature.hpp"
++#include "utilities/dtrace.hpp"
+ #ifdef COMPILER1
+ #include "c1/c1_Defs.hpp"
+ #endif
++#ifndef USDT2
++ HS_DTRACE_PROBE_DECL1(provider, gc__collection__delete, *uintptr_t);
++#endif /* !USDT2 */
+
+ // OopMapStream
+
+@@ -677,6 +681,9 @@
+ " - Derived: " INTPTR_FORMAT " Base: " INTPTR_FORMAT " (Offset: %d)",
+ derived_loc, (address)*derived_loc, (address)base, offset);
+ }
++#ifndef USDT2
++ HS_DTRACE_PROBE1(hotspot, gc__collection__delete, entry);
++#endif /* !USDT2 */
+
+ // Delete entry
+ delete entry;
+--- openjdk.orig/hotspot/src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.cpp 2012-07-12 09:48:40.349999515 -0400
++++ openjdk/hotspot/src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.cpp 2012-07-19 18:38:07.560757426 -0400
+@@ -53,11 +53,18 @@
+ #include "runtime/vmThread.hpp"
+ #include "services/management.hpp"
+ #include "services/memoryService.hpp"
++#include "utilities/dtrace.hpp"
+ #include "utilities/events.hpp"
+ #include "utilities/stack.inline.hpp"
+
+ #include <math.h>
+
++#ifndef USDT2
++ HS_DTRACE_PROBE_DECL2(provider, gc__collection__ParallelCompact__clear, *uintptr_t, *uintptr_t);
++ HS_DTRACE_PROBE_DECL2(provider, gc__collection__parallel__collect, *uintptr_t, *uintptr_t);
++ HS_DTRACE_PROBE_DECL4(provider, gc__collection__move, *uintptr_t, *uintptr_t, *uintptr_t, *uintptr_t);
++#endif /* !USDT2 */
++
+ // All sizes are in HeapWords.
+ const size_t ParallelCompactData::Log2RegionSize = 9; // 512 words
+ const size_t ParallelCompactData::RegionSize = (size_t)1 << Log2RegionSize;
+@@ -433,6 +439,9 @@
+
+ void ParallelCompactData::clear()
+ {
++#ifndef USDT2
++ HS_DTRACE_PROBE2(hotspot, gc__collection__ParallelCompact__clear, &_region_data, _region_data->data_location());
++#endif /* !USDT2 */
+ memset(_region_data, 0, _region_vspace->committed_size());
+ }
+
+@@ -1970,6 +1979,9 @@
+ "should be in vm thread");
+
+ ParallelScavengeHeap* heap = gc_heap();
++#ifndef USDT2
++ HS_DTRACE_PROBE2(hotspot, gc__collection__parallel__collect, heap, heap->gc_cause());
++#endif /* !USDT2 */
+ GCCause::Cause gc_cause = heap->gc_cause();
+ assert(!heap->is_gc_active(), "not reentrant");
+
+@@ -3376,6 +3388,9 @@
+ // past the end of the partial object entering the region (if any).
+ HeapWord* const dest_addr = sd.partial_obj_end(dp_region);
+ HeapWord* const new_top = _space_info[space_id].new_top();
++#ifndef USDT2
++ HS_DTRACE_PROBE4(hotspot, gc__collection__move, &beg_addr, &end_addr, &dest_addr, &new_top);
++#endif /* !USDT2 */
+ assert(new_top >= dest_addr, "bad new_top value");
+ const size_t words = pointer_delta(new_top, dest_addr);
+
+--- openjdk.orig/hotspot/src/share/vm/gc_implementation/g1/g1MarkSweep.cpp 2012-08-15 12:04:43.837439833 -0400
++++ openjdk/hotspot/src/share/vm/gc_implementation/g1/g1MarkSweep.cpp 2012-08-15 12:01:47.897745719 -0400
+@@ -45,8 +45,13 @@
+ #include "runtime/thread.hpp"
+ #include "runtime/vmThread.hpp"
+ #include "utilities/copy.hpp"
++#include "utilities/dtrace.hpp"
+ #include "utilities/events.hpp"
+
++#ifndef USDT2
++ HS_DTRACE_PROBE_DECL2(provider, gc__collection__G1__begin, *uintptr_t, *uintptr_t);
++ HS_DTRACE_PROBE_DECL2(provider, gc__collection__G1__end, *uintptr_t, *uintptr_t);
++ #endif /* !USDT2 */
+ class HeapRegion;
+
+ void G1MarkSweep::invoke_at_safepoint(ReferenceProcessor* rp,
+@@ -84,6 +89,9 @@
+ // The marking doesn't preserve the marks of biased objects.
+ BiasedLocking::preserve_marks();
+
++#ifndef USDT2
++ HS_DTRACE_PROBE2(hotspot, gc__collection__G1__begin, &sh, sh->gc_cause());
++#endif /* !USDT2 */
+ mark_sweep_phase1(marked_for_unloading, clear_all_softrefs);
+
+ mark_sweep_phase2();
+@@ -103,6 +111,9 @@
+ GenRemSet* rs = sh->rem_set();
+ rs->invalidate(sh->perm_gen()->used_region(), true /*whole_heap*/);
+
++#ifndef USDT2
++ HS_DTRACE_PROBE2(hotspot, gc__collection__G1__end, &sh, sh->gc_cause());
++#endif /* !USDT2 */
+ // "free at last gc" is calculated from these.
+ // CHF: cheating for now!!!
+ // Universe::set_heap_capacity_at_last_gc(Universe::heap()->capacity());
+--- openjdk.orig/hotspot/src/share/vm/memory/tenuredGeneration.cpp 2012-08-15 12:03:43.009543167 -0400
++++ openjdk/hotspot/src/share/vm/memory/tenuredGeneration.cpp 2012-08-15 12:14:25.414381449 -0400
+@@ -33,6 +33,12 @@
+ #include "memory/tenuredGeneration.hpp"
+ #include "oops/oop.inline.hpp"
+ #include "runtime/java.hpp"
++#include "utilities/dtrace.hpp"
++
++#ifndef USDT2
++ HS_DTRACE_PROBE_DECL4(provider, gc__collection__tenured__begin, bool, bool, size_t, bool);
++ HS_DTRACE_PROBE_DECL4(provider, gc__collection__tenured__end, bool, bool, size_t, bool);
++#endif /* !USDT2 */
+
+ TenuredGeneration::TenuredGeneration(ReservedSpace rs,
+ size_t initial_byte_size, int level,
+@@ -307,8 +313,14 @@
+ size_t size,
+ bool is_tlab) {
+ retire_alloc_buffers_before_full_gc();
++#ifndef USDT2
++ HS_DTRACE_PROBE4(hotspot, gc__collection__tenured__begin, full, clear_all_soft_refs, size, is_tlab);
++#endif /* !USDT2 */
+ OneContigSpaceCardGeneration::collect(full, clear_all_soft_refs,
+ size, is_tlab);
++#ifndef USDT2
++ HS_DTRACE_PROBE4(hotspot, gc__collection__tenured__end, full, clear_all_soft_refs, size, is_tlab);
++#endif /* !USDT2 */
+ }
+
+ void TenuredGeneration::update_gc_stats(int current_level,
+--- openjdk.orig/hotspot/src/share/vm/gc_implementation/parNew/parNewGeneration.cpp 2012-08-15 12:03:43.039543116 -0400
++++ openjdk/hotspot/src/share/vm/gc_implementation/parNew/parNewGeneration.cpp 2012-08-15 12:18:57.181932342 -0400
+@@ -49,6 +49,12 @@
+ #include "utilities/copy.hpp"
+ #include "utilities/globalDefinitions.hpp"
+ #include "utilities/workgroup.hpp"
++#include "utilities/dtrace.hpp"
++
++#ifndef USDT2
++ HS_DTRACE_PROBE_DECL4(provider, gc__collection__parnew__begin, bool, bool, size_t, bool);
++ HS_DTRACE_PROBE_DECL4(provider, gc__collection__parnew__end, bool, bool, size_t, bool);
++#endif /* !USDT2 */
+
+ #ifdef _MSC_VER
+ #pragma warning( push )
+@@ -878,6 +884,9 @@
+ bool clear_all_soft_refs,
+ size_t size,
+ bool is_tlab) {
++#ifndef USDT2
++ HS_DTRACE_PROBE4(hotspot, gc__collection__parnew__begin, full, clear_all_soft_refs, size, is_tlab);
++#endif /* !USDT2 */
+ assert(full || size > 0, "otherwise we don't want to collect");
+ GenCollectedHeap* gch = GenCollectedHeap::heap();
+ assert(gch->kind() == CollectedHeap::GenCollectedHeap,
+@@ -1032,6 +1041,10 @@
+ gch->print_heap_change(gch_prev_used);
+ }
+
++#ifndef USDT2
++ HS_DTRACE_PROBE4(hotspot, gc__collection__parnew__end, full, clear_all_soft_refs, size, is_tlab);
++#endif /* !USDT2 */
++
+ if (PrintGCDetails && ParallelGCVerbose) {
+ TASKQUEUE_STATS_ONLY(thread_state_set.print_termination_stats());
+ TASKQUEUE_STATS_ONLY(thread_state_set.print_taskqueue_stats());
+--- openjdk.orig/hotspot/src/share/vm/memory/defNewGeneration.cpp 2012-08-15 12:03:43.010543164 -0400
++++ openjdk/hotspot/src/share/vm/memory/defNewGeneration.cpp 2012-08-15 12:21:41.076673646 -0400
+@@ -38,6 +38,7 @@
+ #include "oops/oop.inline.hpp"
+ #include "runtime/java.hpp"
+ #include "utilities/copy.hpp"
++#include "utilities/dtrace.hpp"
+ #include "utilities/stack.inline.hpp"
+ #ifdef TARGET_OS_FAMILY_linux
+ # include "thread_linux.inline.hpp"
+@@ -51,7 +52,10 @@
+ #ifdef TARGET_OS_FAMILY_bsd
+ # include "thread_bsd.inline.hpp"
+ #endif
+-
++#ifndef USDT2
++ HS_DTRACE_PROBE_DECL4(provider, gc__collection__defnew__begin, bool, bool, size_t, bool);
++ HS_DTRACE_PROBE_DECL4(provider, gc__collection__defnew__end, bool, bool, size_t, bool);
++#endif /* !USDT2 */
+ //
+ // DefNewGeneration functions.
+
+@@ -528,6 +532,9 @@
+ bool clear_all_soft_refs,
+ size_t size,
+ bool is_tlab) {
++#ifndef USDT2
++ HS_DTRACE_PROBE4(hotspot, gc__collection__defnew__begin, full, clear_all_soft_refs, size, is_tlab);
++#endif /* !USDT2 */
+ assert(full || size > 0, "otherwise we don't want to collect");
+ GenCollectedHeap* gch = GenCollectedHeap::heap();
+ _next_gen = gch->next_gen(this);
+@@ -661,6 +668,10 @@
+ // does not guarantee monotonicity.
+ jlong now = os::javaTimeNanos() / NANOSECS_PER_MILLISEC;
+ update_time_of_last_gc(now);
++#ifndef USDT2
++ HS_DTRACE_PROBE4(hotspot, gc__collection__defnew__end, full, clear_all_soft_refs, size, is_tlab);
++#endif /* !USDT2 */
++
+ }
+
+ class RemoveForwardPointerClosure: public ObjectClosure {
+--- openjdk.orig/hotspot/src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.cpp 2012-08-15 12:03:43.044543106 -0400
++++ openjdk/hotspot/src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.cpp 2012-08-15 12:25:26.632316692 -0400
+@@ -55,6 +55,12 @@
+ #include "runtime/vmThread.hpp"
+ #include "services/memoryService.hpp"
+ #include "services/runtimeService.hpp"
++#include "utilities/dtrace.hpp"
++
++#ifndef USDT2
++ HS_DTRACE_PROBE_DECL4(provider, gc__collection__contig__begin, bool, bool, size_t, bool);
++ HS_DTRACE_PROBE_DECL4(provider, gc__collection__contig__end, bool, bool, size_t, bool);
++#endif /* !USDT2 */
+
+ // statics
+ CMSCollector* ConcurrentMarkSweepGeneration::_collector = NULL;
+@@ -1647,7 +1653,13 @@
+ size_t size,
+ bool tlab)
+ {
++#ifndef USDT2
++ HS_DTRACE_PROBE4(hotspot, gc__collection__contig__begin, full, clear_all_soft_refs, size, tlab);
++#endif /* !USDT2 */
+ collector()->collect(full, clear_all_soft_refs, size, tlab);
++#ifndef USDT2
++ HS_DTRACE_PROBE4(hotspot, gc__collection__contig__end, full, clear_all_soft_refs, size, tlab);
++#endif /* !USDT2 */
+ }
+
+ void CMSCollector::collect(bool full,
+--- openjdk.orig/hotspot/src/share/vm/memory/generation.cpp 2012-08-15 12:03:43.009543167 -0400
++++ openjdk/hotspot/src/share/vm/memory/generation.cpp 2012-08-15 12:27:46.378095083 -0400
+@@ -39,8 +39,14 @@
+ #include "oops/oop.inline.hpp"
+ #include "runtime/java.hpp"
+ #include "utilities/copy.hpp"
++#include "utilities/dtrace.hpp"
+ #include "utilities/events.hpp"
+
++#ifndef USDT2
++ HS_DTRACE_PROBE_DECL4(provider, gc__collection__contig__begin, bool, bool, size_t, bool);
++ HS_DTRACE_PROBE_DECL4(provider, gc__collection__contig__end, bool, bool, size_t, bool);
++#endif /* !USDT2 */
++
+ Generation::Generation(ReservedSpace rs, size_t initial_size, int level) :
+ _level(level),
+ _ref_processor(NULL) {
+@@ -470,7 +476,13 @@
+ // refs discovery is over the entire heap, not just this generation
+ ReferenceProcessorSpanMutator
+ x(ref_processor(), GenCollectedHeap::heap()->reserved_region());
++#ifndef USDT2
++ HS_DTRACE_PROBE4(hotspot, gc__collection__contig__begin, full, clear_all_soft_refs, size, is_tlab);
++#endif /* !USDT2 */
+ GenMarkSweep::invoke_at_safepoint(_level, ref_processor(), clear_all_soft_refs);
++#ifndef USDT2
++ HS_DTRACE_PROBE4(hotspot, gc__collection__contig__end, full, clear_all_soft_refs, size, is_tlab);
++#endif /* !USDT2 */
+ SpecializationStats::print();
+ }
+
+--- openjdk.orig/hotspot/src/share/vm/gc_implementation/parallelScavenge/parallelScavengeHeap.cpp 2012-08-15 12:03:43.046543102 -0400
++++ openjdk/hotspot/src/share/vm/gc_implementation/parallelScavenge/parallelScavengeHeap.cpp 2012-08-15 12:53:47.762647059 -0400
+@@ -40,8 +40,13 @@
+ #include "runtime/handles.inline.hpp"
+ #include "runtime/java.hpp"
+ #include "runtime/vmThread.hpp"
++#include "utilities/dtrace.hpp"
+ #include "utilities/vmError.hpp"
+
++#ifndef USDT2
++ HS_DTRACE_PROBE_DECL2(provider, gc__collection__parscavenge, *uintptr_t, *uintptr_t);
++#endif /* !USDT2 */
++
+ PSYoungGen* ParallelScavengeHeap::_young_gen = NULL;
+ PSOldGen* ParallelScavengeHeap::_old_gen = NULL;
+ PSPermGen* ParallelScavengeHeap::_perm_gen = NULL;
+@@ -806,6 +811,9 @@
+ }
+
+ VM_ParallelGCSystemGC op(gc_count, full_gc_count, cause);
++#ifndef USDT2
++ HS_DTRACE_PROBE2(hotspot, gc__collection__parscavenge, &op, cause);
++#endif /* !USDT2 */
+ VMThread::execute(&op);
+ }
+
+--- openjdk.orig/hotspot/src/share/vm/gc_implementation/parallelScavenge/psScavenge.cpp 2012-07-25 13:24:07.000000000 -0400
++++ openjdk/hotspot/src/share/vm/gc_implementation/parallelScavenge/psScavenge.cpp 2012-08-17 10:26:44.181117802 -0400
+@@ -51,8 +51,17 @@
+ #include "runtime/vmThread.hpp"
+ #include "runtime/vm_operations.hpp"
+ #include "services/memoryService.hpp"
++#include "utilities/dtrace.hpp"
+ #include "utilities/stack.inline.hpp"
+
++#ifndef USDT2
++ HS_DTRACE_PROBE_DECL2(provider, gc__collection__PSScavenge__begin, *uintptr_t, *uintptr_t);
++ HS_DTRACE_PROBE_DECL2(provider, gc__collection__PSScavenge__end, *uintptr_t, *uintptr_t);
++ HS_DTRACE_PROBE_DECL2(provider, gc__collection__PSParallelCompact__begin, *uintptr_t, *uintptr_t);
++ HS_DTRACE_PROBE_DECL2(provider, gc__collection__PSParallelCompact__end, *uintptr_t, *uintptr_t);
++ HS_DTRACE_PROBE_DECL2(provider, gc__collection__PSMarkSweep__begin, *uintptr_t, *uintptr_t);
++ HS_DTRACE_PROBE_DECL2(provider, gc__collection__PSMarkSweep__end, *uintptr_t, *uintptr_t);
++#endif /* !USDT2 */
+
+ HeapWord* PSScavenge::_to_space_top_before_gc = NULL;
+ int PSScavenge::_consecutive_skipped_scavenges = 0;
+@@ -226,7 +235,13 @@
+ PSAdaptiveSizePolicy* policy = heap->size_policy();
+ IsGCActiveMark mark;
+
++#ifndef USDT2
++ HS_DTRACE_PROBE2(hotspot, gc__collection__PSScavenge__begin, *heap, heap->gc_cause());
++#endif /* !USDT2 */
+ const bool scavenge_done = PSScavenge::invoke_no_policy();
++#ifndef USDT2
++ HS_DTRACE_PROBE2(hotspot, gc__collection__PSScavenge__end, *heap, heap->gc_cause());
++#endif /* !USDT2 */
+ const bool need_full_gc = !scavenge_done ||
+ policy->should_full_GC(heap->old_gen()->free_in_bytes());
+ bool full_gc_done = false;
+@@ -243,9 +258,21 @@
+ const bool clear_all_softrefs = cp->should_clear_all_soft_refs();
+
+ if (UseParallelOldGC) {
++#ifndef USDT2
++ HS_DTRACE_PROBE2(hotspot, gc__collection__PSParallelCompact__begin, *heap, heap->gc_cause());
++#endif /* !USDT2 */
+ full_gc_done = PSParallelCompact::invoke_no_policy(clear_all_softrefs);
++#ifndef USDT2
++ HS_DTRACE_PROBE2(hotspot, gc__collection__PSParallelCompact__end, *heap, heap->gc_cause());
++#endif /* !USDT2 */
+ } else {
++#ifndef USDT2
++ HS_DTRACE_PROBE2(hotspot, gc__collection__PSMarkSweep__begin, *heap, heap->gc_cause());
++#endif /* !USDT2 */
+ full_gc_done = PSMarkSweep::invoke_no_policy(clear_all_softrefs);
++#ifndef USDT2
++ HS_DTRACE_PROBE2(hotspot, gc__collection__PSMarkSweep__end, *heap, heap->gc_cause());
++#endif /* !USDT2 */
+ }
+ }
+
-------------- next part --------------
/*
* probe - gc_collect_contig_begin
*
* @name: gc_collect_contig_begin
* @is_full: If TRUE, attempt a full collection of the generation.
* Else; perform a scavenge
* @size: Word size of the object to be collected.
* @is_tlab: Is this a Thread Local Allocation Buffer?
*
* Description: This marks the start of a contiguous space generation collection.
*
*/
probe hotspot.gc_collect_contig_begin =
process("/home/lberk/code/icedtea7/build/openjdk.build-debug/j2sdk-image/jre/lib/amd64/server/libjvm.so").mark("gc__collection__contig__begin")
{
name = "gc_collect_contig_begin";
is_full = $arg2;
size = $arg3;
is_tlab = $arg4;
probestr = sprintf("%s(is_full='%d', size='%d', is_tlab='%d')", name, is_full, size, is_tlab);
}
/*
* probe - gc_collect_contig_end
*
* @name: gc_collect_contig_end_
* @is_full: If TRUE, attempt a full collection of the generation.
* Else; perform a scavenge.
* @size: Word size of the object to be collected.
* @is_tlab: Is this a Thread Local Allocation Buffer?
*
* Description: This marks the end of a contiguous space generation collection.
*
*/
probe hotspot.gc_collect_contig_end =
process("/home/lberk/code/icedtea7/build/openjdk.build-debug/j2sdk-image/jre/lib/amd64/server/libjvm.so").mark("gc__collection__contig__end")
{
name = "gc_collect_contig_end";
is_full = $arg2;
size = $arg3;
is_tlab = $arg4;
probestr = sprintf("%s(is_full='%d', size='%d', is_tlab='%d')", name, is_full, size, is_tlab);
}
/*
* probe - gc_collect_parnew_begin
*
* @name: gc_collect_parnew_begin
* @is_full: If TRUE, attempt a full collection of the generation.
* Else; perform a scavenge
* @size: Word size of the object to be collected.
* @is_tlab: Is this a Thread Local Allocation Buffer?
*
* Description: This marks the beginning of a parallel collection of a new
* generation.
*
*/
probe hotspot.gc_collect_parnew =
process("/home/lberk/code/icedtea7/build/openjdk.build-debug/j2sdk-image/jre/lib/amd64/server/libjvm.so").mark("gc__collection__parnew__begin")
{
name = "gc_collect_parnew_begin";
is_full = $arg2;
size = $arg3;
is_tlab = $arg4;
probestr = sprintf("%s(is_full='%d', size='%d', is_tlab='%d')", name, is_full, size, is_tlab);
}
/*
* probe - gc_collect_parnew_end
*
* @name: gc_collect_parnew_end
* @is_full: If TRUE, attempt a full collection of the generation.
* Else; perform a scavenge
* @size: Word size of the object to be collected.
* @is_tlab: Is this a Thread Local Allocation Buffer?
*
* Description: This marks the end of a parallel collection of a new
* generation.
*
*/
probe hotspot.gc_collect_parnew_end =
process("/home/lberk/code/icedtea7/build/openjdk.build-debug/j2sdk-image/jre/lib/amd64/server/libjvm.so").mark("gc__collection__parnew__end")
{
name = "gc_collect_parnew_end";
is_full = $arg2;
size = $arg3;
is_tlab = $arg4;
probestr = sprintf("%s(is_full='%d', size='%d', is_tlab='%d')", name, is_full, size, is_tlab);
}
/*
* probe - gc_collect_defnew_begin
*
* @name: gc_collect_defnew_begin
* @is_full: If TRUE, attempt a full collection of the generation.
* Else; perform a scavenge
* @size: Word size of the object to be collected.
* @is_tlab: Is this a Thread Local Allocation Buffer?
*
* Description: This marks the start of a newly defined generation
* collection
*
*/
probe hotspot.gc_collect_defnew_begin =
process("/home/lberk/code/icedtea7/build/openjdk.build-debug/j2sdk-image/jre/lib/amd64/server/libjvm.so").mark("gc__collection__defnew__begin")
{
name = "gc_collect_defnew_begin";
is_full = $arg2;
size = $arg3;
is_tlab = $arg4;
probestr = sprintf("%s(is_full='%d', size='%d', is_tlab='%d')", name, is_full, size, is_tlab);
}
/*
* probe - gc_collect_defnew_end
*
* @name: gc_collect_defnew_end
* @is_full: If TRUE, attempt a full collection of the generation.
* Else; perform a scavenge
* @size: Word size of the object to be collected.
* @is_tlab: Is this a Thread Local Allocation Buffer?
*
* Description: This marks the end of a newly defined generation
* collection
*
*/
probe hotspot.gc_collect_defnew_end =
process("/home/lberk/code/icedtea7/build/openjdk.build-debug/j2sdk-image/jre/lib/amd64/server/libjvm.so").mark("gc__collection__defnew__end")
{
name = "gc_collect_defnew_end";
is_full = $arg2;
size = $arg3;
is_tlab = $arg4;
probestr = sprintf("%s(is_full='%d', size='%d', is_tlab='%d')", name, is_full, size, is_tlab);
}
/*
* probe - gc_collect_tenured_begin
*
* @name: gc_collect_tenured_begin
* @is_full: If TRUE, attempt a full collection of the generation.
* Else; perform a scavenge
* @size: Word size of the object to be collected.
* @is_tlab: Is this a Thread Local Allocation Buffer?
*
* Description: This is the start of a collection of a tenured generation
* (a generation that has survived multiple garbage collections and is
* now in a 'tenured' object space.
*
*/
probe hotspot.gc_collect_tenured_begin =
process("/home/lberk/code/icedtea7/build/openjdk.build-debug/j2sdk-image/jre/lib/amd64/server/libjvm.so").mark("gc__collection__tenured__begin")
{
name = "gc_collect_tenured_begin";
is_full = $arg2;
size = $arg3;
is_tlab = $arg4;
probestr = sprintf("%s(is_full='%d', size='%d', is_tlab='%d')", name, is_full, size, is_tlab);
}
/*
* probe - gc_collect_tenured_end
*
* @name: gc_collect_tenured_end
* @is_full: If TRUE, attempt a full collection of the generation.
* Else; perform a scavenge
* @size: Word size of the object to be collected.
* @is_tlab: Is this a Thread Local Allocation Buffer?
*
* Description: This is the end of a collection of a tenured generation
* (a generation that has survived multiple garbage collections and is
* now in a 'tenured' object space.
*
*/
probe hotspot.gc_collect_tenured_end =
process("/home/lberk/code/icedtea7/build/openjdk.build-debug/j2sdk-image/jre/lib/amd64/server/libjvm.so").mark("gc__collection__tenured__end")
{
name = "gc_collect_tenured_end";
is_full = $arg2;
size = $arg3;
is_tlab = $arg4;
probestr = sprintf("%s(is_full='%d', size='%d', is_tlab='%d')", name, is_full, size, is_tlab);
}
/*
* probe - gc_collect_parallel_scavenge
*
* @name: gc_collect_parallel_scavenge
* @address: Address of object being collected.
* @cause: Cause of the collection.
*
* Description: This is a parallel scavenge, where the jvm process doesn't
* have to halt while the gc is being completed.
*/
probe hotspot.gc_collect_parallel_scavenge =
process("/home/lberk/code/icedtea7/build/openjdk.build-debug/j2sdk-image/jre/lib/amd64/server/libjvm.so").mark("gc__collection__parscavenge")
{
name = "gc_collect_parallel_scavenge";
address = sprintf("0x%x", $arg1);
cause = $arg2;
probestr = sprintf("%s(address='%s', cause='%d')", name, address, cause);
}
/*
* probe - gc_collect_parallel_collect
*
* @name: gc_collect_parallel_collect
* @address: Address of object being collected.
* @cause: Cause of the collection.
*
* Description: This marks a parallel collection.
*
*/
probe hotspot.gc_collect_parallel_collect =
process("/home/lberk/code/icedtea7/build/openjdk.build-debug/j2sdk-image/jre/lib/amd64/server/libjvm.so").mark("gc__collection__parallel__collect")
{
name = "gc_collect_parallel_collect";
address = sprintf("0x%x", $arg1);
cause = $arg2;
probestr = sprintf("%s(address='%s', cause='%d')", name, address, cause);
}
/*
* probe - gc_collect_g1_begin
*
* @name: gc_collect_g1_begin
* @address: Address of object being collected.
* @cause: Cause of the collection.
*
* Description: This marks the start of a G1 style garbage collection
* (Garbage-First Garbage Collector).
*
*/
probe hotspot.gc_collect_g1_begin =
process("/home/lberk/code/icedtea7/build/openjdk.build-debug/j2sdk-image/jre/lib/amd64/server/libjvm.so").mark("gc__collection__G1__begin")
{
name = "gc_collect_g1_begin";
address = sprintf("0x%x", $arg1);
cause = $arg2;
probestr = sprintf("%s(address='%s', cause='%d')", name, address, cause);
}
/*
* probe - gc_collect_g1_end
*
* @name: gc_collect_g1_end
* @address: Address of object being collected.
* @cause: Cause of the collection.
*
* Description: This marks then end of a G1 style garbage collection
* (Garbage-First Garbage Collector).
*
*/
probe hotspot.gc_collect_g1_end =
process("/home/lberk/code/icedtea7/build/openjdk.build-debug/j2sdk-image/jre/lib/amd64/server/libjvm.so").mark("gc__collection__G1__end")
{
name = "gc_collect_g1_end";
address = sprintf("0x%x", $arg1);
cause = $arg2;
probestr = sprintf("%s(address='%s', cause='%d')", name, address, cause);
}
/*
* probe - gc_collect_delete
*
* @name: gc_collect_delete
* @address: Address of object being collected.
* @cause: Cause of the collection.
*
* Description: A delete statement of an object.
*
*/
probe hotspot.gc_collect_delete =
process("/home/lberk/code/icedtea7/build/openjdk.build-debug/j2sdk-image/jre/lib/amd64/server/libjvm.so").mark("gc__collection__delete")
{
name = "gc_collect_delete";
address = sprintf("0x%x", $arg1);
probestr = sprintf("%s(address='%s')", name, address);
}
/*
* probe - gc_collect_PSScavenge_begin
*
* @name: gc_collect_PSScavenge_begin
* @address: Address of scavenge
* @cause: Cause of the collection.
*
* Description: A parallel scavenge begins. A scavenge is a partial garbage
* collection which should be much more common than a full garbage collection
* throughout the course of the java program.
*
*/
probe hotspot.gc_collect_PSScavenge_begin =
process("/home/lberk/code/icedtea7/build/openjdk.build-debug/j2sdk-image/jre/lib/amd64/server/libjvm.so").mark("gc__collection__PSScavenge__begin")
{
name = "gc_collect_PSScavenge_begin";
address = sprintf("0x%x", $arg1);
cause = $arg2;
probestr = sprintf("%s(address='%s', cause='%d')", name, address, cause);
}
/*
* probe - gc_collect_PSScavenge_end
*
* @name: gc_collect_PSScavenge_end
* @address: Address of scavenge.
* @cause: Cause of the collection.
*
* Description: The end of the parallel scavenge. The beginning and end of
* the scavenge is noted due to the possbility of multiple scavenges occuring
* at the same time.
*
*/
probe hotspot.gc_collect_PSScavenge_end =
process("/home/lberk/code/icedtea7/build/openjdk.build-debug/j2sdk-image/jre/lib/amd64/server/libjvm.so").mark("gc__collection__PSScavenge__end")
{
name = "gc_collect_PSScavenge_end";
address = sprintf("0x%x", $arg1);
cause = $arg2;
probestr = sprintf("%s(address='%s', cause='%d')", name, address, cause);
}
/*
* probe - gc_collect_PSParallelCompact_begin
*
* @name: gc_collect_PSParallelCompact_begin
* @address: Address of compaction.
* @cause: Cause of the collection.
*
* Description: This marks the start of a parallel compaction.
*
*/
probe hotspot.gc_collect_PSParallelCompact_begin =
process("/home/lberk/code/icedtea7/build/openjdk.build-debug/j2sdk-image/jre/lib/amd64/server/libjvm.so").mark("gc__collection__PSParallelCompact__begin")
{
name = "gc_collect_PSParallelCompact_begin";
address = sprintf("0x%x", $arg1);
cause = $arg2;
probestr = sprintf("%s(address='%s', cause='%d')", name, address, cause);
}
/*
* probe - gc_collect_PSParallelCompact_end
*
* @name: gc_collect_PSParallelCompact_end
* @address: Address of compaction.
* @cause: Cause of the collection.
*
* Description: This marks the end of a parallel compaction.
*
*/
probe hotspot.gc_collect_PSParallelCompact_end =
process("/home/lberk/code/icedtea7/build/openjdk.build-debug/j2sdk-image/jre/lib/amd64/server/libjvm.so").mark("gc__collection__PSParallelCompact__end")
{
name = "gc_collect_PSParallelCompact_end";
address = sprintf("0x%x", $arg1);
cause = $arg2;
probestr = sprintf("%s(address='%s', cause='%d')", name, address, cause);
}
/*
* probe - gc_collect_PSMarkSweep_begin
*
* @name: gc_collect_PSMarkSweep_begin
* @address: Address of parallel mark sweep process.
* @cause: Cause of the collection.
*
* Description: This marks the start of a parallel mark sweep for
* objects that require collection.
*
*/
probe hotspot.gc_collect_PSMarkSweep_begin =
process("/home/lberk/code/icedtea7/build/openjdk.build-debug/j2sdk-image/jre/lib/amd64/server/libjvm.so").mark("gc__collection__PSMarkSweep__begin")
{
name = "gc_collect_PSMarkSweep_begin";
address = sprintf("0x%x", $arg1);
cause = $arg2;
probestr = sprintf("%s(address='%s', cause='%d')", name, address, cause);
}
/*
* probe - gc_collect_PSMarkSweep_end
*
* @name: gc_collect_PSMarkSweep_end
* @address: Address of parallel mark sweep process.
* @cause: Cause of the collection.
*
* Description: This marks the start of a parallel mark sweep for
* objects that require collection.
*
*/
probe hotspot.gc_collect_PSMarkSweep_end =
process("/home/lberk/code/icedtea7/build/openjdk.build-debug/j2sdk-image/jre/lib/amd64/server/libjvm.so").mark("gc__collection__PSMarkSweep__end")
{
name = "gc_collect_PSMarkSweep_end";
address = sprintf("0x%x", $arg1);
cause = $arg2;
probestr = sprintf("%s(address='%s', cause='%d')", name, address, cause);
}
/*
* probe - gc_collect_move
*
* @name: gc_collect_move
* @from_bottom_address: The bottom address of the object being moved.
* @from_top_address: The top address of the object being moved.
* @to_bottom_address: The bottom address of where the object is being moved to.
* @to_top_address: The top address of where the object is being moved to.
* @cause: Cause of the collection.
*
* Description: During garbage collections there are times where objects or
* blocks of memory need to be moved. This probe will detail from where
* the memory is moving and where to.
*
*/
probe hotspot.gc_collect_move =
process("/home/lberk/code/icedtea7/build/openjdk.build-debug/j2sdk-image/jre/lib/amd64/server/libjvm.so").mark("gc__collection__move")
{
name = "gc_collect_move";
from_bottom_address = sprintf("0x%x", $arg1);
from_top_address = sprintf("0x%x", $arg2);
to_bottom_address = sprintf("0x%x", $arg3);
to_top_address = sprintf("0x%x", $arg4);
probestr = sprintf("%s(from_bottom_address='%s', from_top_address='%s', to_bottom_address='%s', to_top_address='%s')", name, from_bottom_address, from_top_address, to_bottom_address, to_top_address);
}
/*
* probe - gc_collect_clear
*
* @name: gc_collect_clear
* @address: Address of object being collected.
* @cause: Cause of the collection.
*
* Description: This probe dictates the region of data that needs to be
* cleared in a compaction action.
*
*/
probe hotspot.gc_collect_clear =
process("/home/lberk/code/icedtea7/build/openjdk.build-debug/j2sdk-image/jre/lib/amd64/server/libjvm.so").mark("gc__collection__ParallelCompact__clear")
{
name = "gc_collect_clear";
region_data = sprintf("0x%x", $arg1);
data_location = sprintf("0x%x", $arg2);
probestr = sprintf("%s(region_data='%s', data_location='%s')", name, region_data, data_location);
}
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