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7145569: G1: optimize nmethods scanning

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Add a list of nmethods to the RSet for a region that contain references into the region. Skip scanning the code cache during root scanning and scan the nmethod lists during RSet scanning instead.

Reviewed-by: tschatzl, brutisso, mgerdin, twisti, kvn
This commit is contained in:
John Cuthbertson 2013-08-15 10:52:18 +02:00
parent c144b8c30f
commit f63547bf71
22 changed files with 1256 additions and 476 deletions
Download patch file Download diff file Expand all files Collapse all files

23
hotspot/src/share/vm/gc_implementation/g1/concurrentMark.cpp
View file

@ -4529,7 +4529,7 @@ G1PrintRegionLivenessInfoClosure(outputStream* out, const char* phase_name)
_total_prev_live_bytes(0), _total_next_live_bytes(0),
_hum_used_bytes(0), _hum_capacity_bytes(0),
_hum_prev_live_bytes(0), _hum_next_live_bytes(0),
_total_remset_bytes(0) {
_total_remset_bytes(0), _total_strong_code_roots_bytes(0) {
G1CollectedHeap* g1h = G1CollectedHeap::heap();
MemRegion g1_committed = g1h->g1_committed();
MemRegion g1_reserved = g1h->g1_reserved();
@ -4553,9 +4553,11 @@ G1PrintRegionLivenessInfoClosure(outputStream* out, const char* phase_name)
G1PPRL_BYTE_H_FORMAT
G1PPRL_BYTE_H_FORMAT
G1PPRL_DOUBLE_H_FORMAT
G1PPRL_BYTE_H_FORMAT
G1PPRL_BYTE_H_FORMAT,
"type", "address-range",
"used", "prev-live", "next-live", "gc-eff", "remset");
"used", "prev-live", "next-live", "gc-eff",
"remset", "code-roots");
_out->print_cr(G1PPRL_LINE_PREFIX
G1PPRL_TYPE_H_FORMAT
G1PPRL_ADDR_BASE_H_FORMAT
@ -4563,9 +4565,11 @@ G1PrintRegionLivenessInfoClosure(outputStream* out, const char* phase_name)
G1PPRL_BYTE_H_FORMAT
G1PPRL_BYTE_H_FORMAT
G1PPRL_DOUBLE_H_FORMAT
G1PPRL_BYTE_H_FORMAT
G1PPRL_BYTE_H_FORMAT,
"", "",
"(bytes)", "(bytes)", "(bytes)", "(bytes/ms)", "(bytes)");
"(bytes)", "(bytes)", "(bytes)", "(bytes/ms)",
"(bytes)", "(bytes)");
}
// It takes as a parameter a reference to one of the _hum_* fields, it
@ -4608,6 +4612,8 @@ bool G1PrintRegionLivenessInfoClosure::doHeapRegion(HeapRegion* r) {
size_t next_live_bytes = r->next_live_bytes();
double gc_eff = r->gc_efficiency();
size_t remset_bytes = r->rem_set()->mem_size();
size_t strong_code_roots_bytes = r->rem_set()->strong_code_roots_mem_size();
if (r->used() == 0) {
type = "FREE";
} else if (r->is_survivor()) {
@ -4642,6 +4648,7 @@ bool G1PrintRegionLivenessInfoClosure::doHeapRegion(HeapRegion* r) {
_total_prev_live_bytes += prev_live_bytes;
_total_next_live_bytes += next_live_bytes;
_total_remset_bytes += remset_bytes;
_total_strong_code_roots_bytes += strong_code_roots_bytes;
// Print a line for this particular region.
_out->print_cr(G1PPRL_LINE_PREFIX
@ -4651,9 +4658,11 @@ bool G1PrintRegionLivenessInfoClosure::doHeapRegion(HeapRegion* r) {
G1PPRL_BYTE_FORMAT
G1PPRL_BYTE_FORMAT
G1PPRL_DOUBLE_FORMAT
G1PPRL_BYTE_FORMAT
G1PPRL_BYTE_FORMAT,
type, bottom, end,
used_bytes, prev_live_bytes, next_live_bytes, gc_eff , remset_bytes);
used_bytes, prev_live_bytes, next_live_bytes, gc_eff,
remset_bytes, strong_code_roots_bytes);
return false;
}
@ -4669,7 +4678,8 @@ G1PrintRegionLivenessInfoClosure::~G1PrintRegionLivenessInfoClosure() {
G1PPRL_SUM_MB_PERC_FORMAT("used")
G1PPRL_SUM_MB_PERC_FORMAT("prev-live")
G1PPRL_SUM_MB_PERC_FORMAT("next-live")
G1PPRL_SUM_MB_FORMAT("remset"),
G1PPRL_SUM_MB_FORMAT("remset")
G1PPRL_SUM_MB_FORMAT("code-roots"),
bytes_to_mb(_total_capacity_bytes),
bytes_to_mb(_total_used_bytes),
perc(_total_used_bytes, _total_capacity_bytes),
@ -4677,6 +4687,7 @@ G1PrintRegionLivenessInfoClosure::~G1PrintRegionLivenessInfoClosure() {
perc(_total_prev_live_bytes, _total_capacity_bytes),
bytes_to_mb(_total_next_live_bytes),
perc(_total_next_live_bytes, _total_capacity_bytes),
bytes_to_mb(_total_remset_bytes));
bytes_to_mb(_total_remset_bytes),
bytes_to_mb(_total_strong_code_roots_bytes));
_out->cr();
}