Mercurial > hg > graal-compiler
view src/share/vm/prims/jvmtiTrace.cpp @ 2149:7e37af9d69ef
7011379: G1: overly long concurrent marking cycles
Summary: This changeset introduces filtering of SATB buffers at the point when they are about to be enqueued. If this filtering clears enough entries on each buffer, the buffer can then be re-used and not enqueued. This cuts down the number of SATB buffers that need to be processed by the concurrent marking threads.
Reviewed-by: johnc, ysr
author | tonyp |
---|---|
date | Wed, 19 Jan 2011 09:35:17 -0500 |
parents | f95d63e2154a |
children | da91efe96a93 |
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/* * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #include "jvmtifiles/jvmtiEnv.hpp" #include "prims/jvmtiTrace.hpp" // // class JvmtiTrace // // Support for JVMTI tracing code // // ------------ // Usage: // -XX:TraceJVMTI=DESC,DESC,DESC // // DESC is DOMAIN ACTION KIND // // DOMAIN is function name // event name // "all" (all functions and events) // "func" (all functions except boring) // "allfunc" (all functions) // "event" (all events) // "ec" (event controller) // // ACTION is "+" (add) // "-" (remove) // // KIND is // for func // "i" (input params) // "e" (error returns) // "o" (output) // for event // "t" (event triggered aka posted) // "s" (event sent) // // Example: // -XX:TraceJVMTI=ec+,GetCallerFrame+ie,Breakpoint+s #ifdef JVMTI_TRACE bool JvmtiTrace::_initialized = false; bool JvmtiTrace::_on = false; bool JvmtiTrace::_trace_event_controller = false; void JvmtiTrace::initialize() { if (_initialized) { return; } SafeResourceMark rm; const char *very_end; const char *curr; if (TraceJVMTI != NULL) { curr = TraceJVMTI; } else { curr = ""; // hack in fixed tracing here } very_end = curr + strlen(curr); while (curr < very_end) { const char *curr_end = strchr(curr, ','); if (curr_end == NULL) { curr_end = very_end; } const char *op_pos = strchr(curr, '+'); const char *minus_pos = strchr(curr, '-'); if (minus_pos != NULL && (minus_pos < op_pos || op_pos == NULL)) { op_pos = minus_pos; } char op; const char *flags = op_pos + 1; const char *flags_end = curr_end; if (op_pos == NULL || op_pos > curr_end) { flags = "ies"; flags_end = flags + strlen(flags); op_pos = curr_end; op = '+'; } else { op = *op_pos; } jbyte bits = 0; for (; flags < flags_end; ++flags) { switch (*flags) { case 'i': bits |= SHOW_IN; break; case 'I': bits |= SHOW_IN_DETAIL; break; case 'e': bits |= SHOW_ERROR; break; case 'o': bits |= SHOW_OUT; break; case 'O': bits |= SHOW_OUT_DETAIL; break; case 't': bits |= SHOW_EVENT_TRIGGER; break; case 's': bits |= SHOW_EVENT_SENT; break; default: tty->print_cr("Invalid trace flag '%c'", *flags); break; } } const int FUNC = 1; const int EXCLUDE = 2; const int ALL_FUNC = 4; const int EVENT = 8; const int ALL_EVENT = 16; int domain = 0; size_t len = op_pos - curr; if (op_pos == curr) { domain = ALL_FUNC | FUNC | ALL_EVENT | EVENT | EXCLUDE; } else if (len==3 && strncmp(curr, "all", 3)==0) { domain = ALL_FUNC | FUNC | ALL_EVENT | EVENT; } else if (len==7 && strncmp(curr, "allfunc", 7)==0) { domain = ALL_FUNC | FUNC; } else if (len==4 && strncmp(curr, "func", 4)==0) { domain = ALL_FUNC | FUNC | EXCLUDE; } else if (len==8 && strncmp(curr, "allevent", 8)==0) { domain = ALL_EVENT | EVENT; } else if (len==5 && strncmp(curr, "event", 5)==0) { domain = ALL_EVENT | EVENT; } else if (len==2 && strncmp(curr, "ec", 2)==0) { _trace_event_controller = true; tty->print_cr("JVMTI Tracing the event controller"); } else { domain = FUNC | EVENT; // go searching } int exclude_index = 0; if (domain & FUNC) { if (domain & ALL_FUNC) { if (domain & EXCLUDE) { tty->print("JVMTI Tracing all significant functions"); } else { tty->print_cr("JVMTI Tracing all functions"); } } for (int i = 0; i <= _max_function_index; ++i) { if (domain & EXCLUDE && i == _exclude_functions[exclude_index]) { ++exclude_index; } else { bool do_op = false; if (domain & ALL_FUNC) { do_op = true; } else { const char *fname = function_name(i); if (fname != NULL) { size_t fnlen = strlen(fname); if (len==fnlen && strncmp(curr, fname, fnlen)==0) { tty->print_cr("JVMTI Tracing the function: %s", fname); do_op = true; } } } if (do_op) { if (op == '+') { _trace_flags[i] |= bits; } else { _trace_flags[i] &= ~bits; } _on = true; } } } } if (domain & EVENT) { if (domain & ALL_EVENT) { tty->print_cr("JVMTI Tracing all events"); } for (int i = 0; i <= _max_event_index; ++i) { bool do_op = false; if (domain & ALL_EVENT) { do_op = true; } else { const char *ename = event_name(i); if (ename != NULL) { size_t evtlen = strlen(ename); if (len==evtlen && strncmp(curr, ename, evtlen)==0) { tty->print_cr("JVMTI Tracing the event: %s", ename); do_op = true; } } } if (do_op) { if (op == '+') { _event_trace_flags[i] |= bits; } else { _event_trace_flags[i] &= ~bits; } _on = true; } } } if (!_on && (domain & (FUNC|EVENT))) { tty->print_cr("JVMTI Trace domain not found"); } curr = curr_end + 1; } _initialized = true; } void JvmtiTrace::shutdown() { int i; _on = false; _trace_event_controller = false; for (i = 0; i <= _max_function_index; ++i) { _trace_flags[i] = 0; } for (i = 0; i <= _max_event_index; ++i) { _event_trace_flags[i] = 0; } } const char* JvmtiTrace::enum_name(const char** names, const jint* values, jint value) { for (int index = 0; names[index] != 0; ++index) { if (values[index] == value) { return names[index]; } } return "*INVALID-ENUM-VALUE*"; } // return a valid string no matter what state the thread is in const char *JvmtiTrace::safe_get_thread_name(Thread *thread) { if (thread == NULL) { return "NULL"; } if (!thread->is_Java_thread()) { return thread->name(); } JavaThread *java_thread = (JavaThread *)thread; oop threadObj = java_thread->threadObj(); if (threadObj == NULL) { return "NULL"; } typeArrayOop name = java_lang_Thread::name(threadObj); if (name == NULL) { return "<NOT FILLED IN>"; } return UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length()); } // return the name of the current thread const char *JvmtiTrace::safe_get_current_thread_name() { if (JvmtiEnv::is_vm_live()) { return JvmtiTrace::safe_get_thread_name(Thread::current()); } else { return "VM not live"; } } // return a valid string no matter what the state of k_mirror const char * JvmtiTrace::get_class_name(oop k_mirror) { if (java_lang_Class::is_primitive(k_mirror)) { return "primitive"; } klassOop k_oop = java_lang_Class::as_klassOop(k_mirror); if (k_oop == NULL) { return "INVALID"; } return Klass::cast(k_oop)->external_name(); } #endif /*JVMTI_TRACE */