Fri, 12 Feb 2010 15:27:36 -0800
Merge
duke@435 | 1 | /* |
xdono@1383 | 2 | * Copyright 1997-2009 Sun Microsystems, Inc. All Rights Reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
duke@435 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
duke@435 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
duke@435 | 21 | * have any questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
duke@435 | 25 | # include "incls/_precompiled.incl" |
duke@435 | 26 | # include "incls/_sweeper.cpp.incl" |
duke@435 | 27 | |
duke@435 | 28 | long NMethodSweeper::_traversals = 0; // No. of stack traversals performed |
duke@435 | 29 | CodeBlob* NMethodSweeper::_current = NULL; // Current nmethod |
duke@435 | 30 | int NMethodSweeper::_seen = 0 ; // No. of blobs we have currently processed in current pass of CodeCache |
duke@435 | 31 | int NMethodSweeper::_invocations = 0; // No. of invocations left until we are completed with this pass |
duke@435 | 32 | |
duke@435 | 33 | jint NMethodSweeper::_locked_seen = 0; |
duke@435 | 34 | jint NMethodSweeper::_not_entrant_seen_on_stack = 0; |
duke@435 | 35 | bool NMethodSweeper::_rescan = false; |
kvn@1637 | 36 | bool NMethodSweeper::_was_full = false; |
kvn@1637 | 37 | jint NMethodSweeper::_advise_to_sweep = 0; |
kvn@1637 | 38 | jlong NMethodSweeper::_last_was_full = 0; |
kvn@1637 | 39 | uint NMethodSweeper::_highest_marked = 0; |
kvn@1637 | 40 | long NMethodSweeper::_was_full_traversal = 0; |
duke@435 | 41 | |
jrose@1424 | 42 | class MarkActivationClosure: public CodeBlobClosure { |
jrose@1424 | 43 | public: |
jrose@1424 | 44 | virtual void do_code_blob(CodeBlob* cb) { |
jrose@1424 | 45 | // If we see an activation belonging to a non_entrant nmethod, we mark it. |
jrose@1424 | 46 | if (cb->is_nmethod() && ((nmethod*)cb)->is_not_entrant()) { |
jrose@1424 | 47 | ((nmethod*)cb)->mark_as_seen_on_stack(); |
jrose@1424 | 48 | } |
jrose@1424 | 49 | } |
jrose@1424 | 50 | }; |
jrose@1424 | 51 | static MarkActivationClosure mark_activation_closure; |
jrose@1424 | 52 | |
duke@435 | 53 | void NMethodSweeper::sweep() { |
duke@435 | 54 | assert(SafepointSynchronize::is_at_safepoint(), "must be executed at a safepoint"); |
duke@435 | 55 | if (!MethodFlushing) return; |
duke@435 | 56 | |
duke@435 | 57 | // No need to synchronize access, since this is always executed at a |
duke@435 | 58 | // safepoint. If we aren't in the middle of scan and a rescan |
duke@435 | 59 | // hasn't been requested then just return. |
duke@435 | 60 | if (_current == NULL && !_rescan) return; |
duke@435 | 61 | |
duke@435 | 62 | // Make sure CompiledIC_lock in unlocked, since we might update some |
duke@435 | 63 | // inline caches. If it is, we just bail-out and try later. |
duke@435 | 64 | if (CompiledIC_lock->is_locked() || Patching_lock->is_locked()) return; |
duke@435 | 65 | |
duke@435 | 66 | // Check for restart |
duke@435 | 67 | assert(CodeCache::find_blob_unsafe(_current) == _current, "Sweeper nmethod cached state invalid"); |
duke@435 | 68 | if (_current == NULL) { |
duke@435 | 69 | _seen = 0; |
duke@435 | 70 | _invocations = NmethodSweepFraction; |
duke@435 | 71 | _current = CodeCache::first(); |
duke@435 | 72 | _traversals += 1; |
duke@435 | 73 | if (PrintMethodFlushing) { |
duke@435 | 74 | tty->print_cr("### Sweep: stack traversal %d", _traversals); |
duke@435 | 75 | } |
jrose@1424 | 76 | Threads::nmethods_do(&mark_activation_closure); |
duke@435 | 77 | |
duke@435 | 78 | // reset the flags since we started a scan from the beginning. |
duke@435 | 79 | _rescan = false; |
duke@435 | 80 | _locked_seen = 0; |
duke@435 | 81 | _not_entrant_seen_on_stack = 0; |
duke@435 | 82 | } |
duke@435 | 83 | |
duke@435 | 84 | if (PrintMethodFlushing && Verbose) { |
duke@435 | 85 | tty->print_cr("### Sweep at %d out of %d. Invocations left: %d", _seen, CodeCache::nof_blobs(), _invocations); |
duke@435 | 86 | } |
duke@435 | 87 | |
duke@435 | 88 | // We want to visit all nmethods after NmethodSweepFraction invocations. |
duke@435 | 89 | // If invocation is 1 we do the rest |
duke@435 | 90 | int todo = CodeCache::nof_blobs(); |
duke@435 | 91 | if (_invocations != 1) { |
duke@435 | 92 | todo = (CodeCache::nof_blobs() - _seen) / _invocations; |
duke@435 | 93 | _invocations--; |
duke@435 | 94 | } |
duke@435 | 95 | |
duke@435 | 96 | for(int i = 0; i < todo && _current != NULL; i++) { |
duke@435 | 97 | CodeBlob* next = CodeCache::next(_current); // Read next before we potentially delete current |
duke@435 | 98 | if (_current->is_nmethod()) { |
duke@435 | 99 | process_nmethod((nmethod *)_current); |
duke@435 | 100 | } |
duke@435 | 101 | _seen++; |
duke@435 | 102 | _current = next; |
duke@435 | 103 | } |
duke@435 | 104 | // Because we could stop on a codeBlob other than an nmethod we skip forward |
duke@435 | 105 | // to the next nmethod (if any). codeBlobs other than nmethods can be freed |
duke@435 | 106 | // async to us and make _current invalid while we sleep. |
duke@435 | 107 | while (_current != NULL && !_current->is_nmethod()) { |
duke@435 | 108 | _current = CodeCache::next(_current); |
duke@435 | 109 | } |
duke@435 | 110 | |
duke@435 | 111 | if (_current == NULL && !_rescan && (_locked_seen || _not_entrant_seen_on_stack)) { |
duke@435 | 112 | // we've completed a scan without making progress but there were |
duke@435 | 113 | // nmethods we were unable to process either because they were |
duke@435 | 114 | // locked or were still on stack. We don't have to aggresively |
duke@435 | 115 | // clean them up so just stop scanning. We could scan once more |
duke@435 | 116 | // but that complicates the control logic and it's unlikely to |
duke@435 | 117 | // matter much. |
duke@435 | 118 | if (PrintMethodFlushing) { |
duke@435 | 119 | tty->print_cr("### Couldn't make progress on some nmethods so stopping sweep"); |
duke@435 | 120 | } |
duke@435 | 121 | } |
kvn@1637 | 122 | |
kvn@1637 | 123 | if (UseCodeCacheFlushing) { |
kvn@1637 | 124 | if (!CodeCache::needs_flushing()) { |
kvn@1637 | 125 | // In a safepoint, no race with setters |
kvn@1637 | 126 | _advise_to_sweep = 0; |
kvn@1637 | 127 | } |
kvn@1637 | 128 | |
kvn@1637 | 129 | if (was_full()) { |
kvn@1637 | 130 | // There was some progress so attempt to restart the compiler |
kvn@1637 | 131 | jlong now = os::javaTimeMillis(); |
kvn@1637 | 132 | jlong max_interval = (jlong)MinCodeCacheFlushingInterval * (jlong)1000; |
kvn@1637 | 133 | jlong curr_interval = now - _last_was_full; |
kvn@1637 | 134 | if ((!CodeCache::needs_flushing()) && (curr_interval > max_interval)) { |
kvn@1637 | 135 | CompileBroker::set_should_compile_new_jobs(CompileBroker::run_compilation); |
kvn@1637 | 136 | set_was_full(false); |
kvn@1637 | 137 | |
kvn@1637 | 138 | // Update the _last_was_full time so we can tell how fast the |
kvn@1637 | 139 | // code cache is filling up |
kvn@1637 | 140 | _last_was_full = os::javaTimeMillis(); |
kvn@1637 | 141 | |
kvn@1637 | 142 | if (PrintMethodFlushing) { |
kvn@1637 | 143 | tty->print_cr("### sweeper: Live blobs:" UINT32_FORMAT "/Free code cache:" SIZE_FORMAT " bytes, restarting compiler", |
kvn@1637 | 144 | CodeCache::nof_blobs(), CodeCache::unallocated_capacity()); |
kvn@1637 | 145 | } |
kvn@1637 | 146 | if (LogCompilation && (xtty != NULL)) { |
kvn@1637 | 147 | ttyLocker ttyl; |
kvn@1637 | 148 | xtty->begin_elem("restart_compiler live_blobs='" UINT32_FORMAT "' free_code_cache='" SIZE_FORMAT "'", |
kvn@1637 | 149 | CodeCache::nof_blobs(), CodeCache::unallocated_capacity()); |
kvn@1637 | 150 | xtty->stamp(); |
kvn@1637 | 151 | xtty->end_elem(); |
kvn@1637 | 152 | } |
kvn@1637 | 153 | } |
kvn@1637 | 154 | } |
kvn@1637 | 155 | } |
duke@435 | 156 | } |
duke@435 | 157 | |
duke@435 | 158 | |
duke@435 | 159 | void NMethodSweeper::process_nmethod(nmethod *nm) { |
duke@435 | 160 | // Skip methods that are currently referenced by the VM |
duke@435 | 161 | if (nm->is_locked_by_vm()) { |
duke@435 | 162 | // But still remember to clean-up inline caches for alive nmethods |
duke@435 | 163 | if (nm->is_alive()) { |
duke@435 | 164 | // Clean-up all inline caches that points to zombie/non-reentrant methods |
duke@435 | 165 | nm->cleanup_inline_caches(); |
duke@435 | 166 | } else { |
duke@435 | 167 | _locked_seen++; |
duke@435 | 168 | } |
duke@435 | 169 | return; |
duke@435 | 170 | } |
duke@435 | 171 | |
duke@435 | 172 | if (nm->is_zombie()) { |
duke@435 | 173 | // If it is first time, we see nmethod then we mark it. Otherwise, |
duke@435 | 174 | // we reclame it. When we have seen a zombie method twice, we know that |
duke@435 | 175 | // there are no inline caches that referes to it. |
duke@435 | 176 | if (nm->is_marked_for_reclamation()) { |
duke@435 | 177 | assert(!nm->is_locked_by_vm(), "must not flush locked nmethods"); |
ysr@1376 | 178 | if (PrintMethodFlushing && Verbose) { |
kvn@1637 | 179 | tty->print_cr("### Nmethod %3d/" PTR_FORMAT " (marked for reclamation) being flushed", nm->compile_id(), nm); |
ysr@1376 | 180 | } |
duke@435 | 181 | nm->flush(); |
duke@435 | 182 | } else { |
ysr@1376 | 183 | if (PrintMethodFlushing && Verbose) { |
kvn@1637 | 184 | tty->print_cr("### Nmethod %3d/" PTR_FORMAT " (zombie) being marked for reclamation", nm->compile_id(), nm); |
ysr@1376 | 185 | } |
duke@435 | 186 | nm->mark_for_reclamation(); |
duke@435 | 187 | _rescan = true; |
duke@435 | 188 | } |
duke@435 | 189 | } else if (nm->is_not_entrant()) { |
duke@435 | 190 | // If there is no current activations of this method on the |
duke@435 | 191 | // stack we can safely convert it to a zombie method |
duke@435 | 192 | if (nm->can_not_entrant_be_converted()) { |
ysr@1376 | 193 | if (PrintMethodFlushing && Verbose) { |
kvn@1637 | 194 | tty->print_cr("### Nmethod %3d/" PTR_FORMAT " (not entrant) being made zombie", nm->compile_id(), nm); |
ysr@1376 | 195 | } |
duke@435 | 196 | nm->make_zombie(); |
duke@435 | 197 | _rescan = true; |
duke@435 | 198 | } else { |
duke@435 | 199 | // Still alive, clean up its inline caches |
duke@435 | 200 | nm->cleanup_inline_caches(); |
duke@435 | 201 | // we coudn't transition this nmethod so don't immediately |
duke@435 | 202 | // request a rescan. If this method stays on the stack for a |
duke@435 | 203 | // long time we don't want to keep rescanning at every safepoint. |
duke@435 | 204 | _not_entrant_seen_on_stack++; |
duke@435 | 205 | } |
duke@435 | 206 | } else if (nm->is_unloaded()) { |
duke@435 | 207 | // Unloaded code, just make it a zombie |
ysr@1376 | 208 | if (PrintMethodFlushing && Verbose) |
kvn@1637 | 209 | tty->print_cr("### Nmethod %3d/" PTR_FORMAT " (unloaded) being made zombie", nm->compile_id(), nm); |
ysr@1376 | 210 | if (nm->is_osr_method()) { |
duke@435 | 211 | // No inline caches will ever point to osr methods, so we can just remove it |
duke@435 | 212 | nm->flush(); |
duke@435 | 213 | } else { |
duke@435 | 214 | nm->make_zombie(); |
duke@435 | 215 | _rescan = true; |
duke@435 | 216 | } |
duke@435 | 217 | } else { |
duke@435 | 218 | assert(nm->is_alive(), "should be alive"); |
kvn@1637 | 219 | |
kvn@1637 | 220 | if (UseCodeCacheFlushing) { |
kvn@1637 | 221 | if ((nm->method()->code() != nm) && !(nm->is_locked_by_vm()) && !(nm->is_osr_method()) && |
kvn@1637 | 222 | (_traversals > _was_full_traversal+2) && (((uint)nm->compile_id()) < _highest_marked) && |
kvn@1637 | 223 | CodeCache::needs_flushing()) { |
kvn@1637 | 224 | // This method has not been called since the forced cleanup happened |
kvn@1637 | 225 | nm->make_not_entrant(); |
kvn@1637 | 226 | } |
kvn@1637 | 227 | } |
kvn@1637 | 228 | |
duke@435 | 229 | // Clean-up all inline caches that points to zombie/non-reentrant methods |
duke@435 | 230 | nm->cleanup_inline_caches(); |
duke@435 | 231 | } |
duke@435 | 232 | } |
kvn@1637 | 233 | |
kvn@1637 | 234 | // Code cache unloading: when compilers notice the code cache is getting full, |
kvn@1637 | 235 | // they will call a vm op that comes here. This code attempts to speculatively |
kvn@1637 | 236 | // unload the oldest half of the nmethods (based on the compile job id) by |
kvn@1637 | 237 | // saving the old code in a list in the CodeCache. Then |
kvn@1637 | 238 | // execution resumes. If a method so marked is not called by the second |
kvn@1637 | 239 | // safepoint from the current one, the nmethod will be marked non-entrant and |
kvn@1637 | 240 | // got rid of by normal sweeping. If the method is called, the methodOop's |
kvn@1637 | 241 | // _code field is restored and the methodOop/nmethod |
kvn@1637 | 242 | // go back to their normal state. |
kvn@1637 | 243 | void NMethodSweeper::handle_full_code_cache(bool is_full) { |
kvn@1637 | 244 | // Only the first one to notice can advise us to start early cleaning |
kvn@1637 | 245 | if (!is_full){ |
kvn@1637 | 246 | jint old = Atomic::cmpxchg( 1, &_advise_to_sweep, 0 ); |
kvn@1637 | 247 | if (old != 0) { |
kvn@1637 | 248 | return; |
kvn@1637 | 249 | } |
kvn@1637 | 250 | } |
kvn@1637 | 251 | |
kvn@1637 | 252 | if (is_full) { |
kvn@1637 | 253 | // Since code cache is full, immediately stop new compiles |
kvn@1637 | 254 | bool did_set = CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation); |
kvn@1637 | 255 | if (!did_set) { |
kvn@1637 | 256 | // only the first to notice can start the cleaning, |
kvn@1637 | 257 | // others will go back and block |
kvn@1637 | 258 | return; |
kvn@1637 | 259 | } |
kvn@1637 | 260 | set_was_full(true); |
kvn@1637 | 261 | |
kvn@1637 | 262 | // If we run out within MinCodeCacheFlushingInterval of the last unload time, give up |
kvn@1637 | 263 | jlong now = os::javaTimeMillis(); |
kvn@1637 | 264 | jlong max_interval = (jlong)MinCodeCacheFlushingInterval * (jlong)1000; |
kvn@1637 | 265 | jlong curr_interval = now - _last_was_full; |
kvn@1637 | 266 | if (curr_interval < max_interval) { |
kvn@1637 | 267 | _rescan = true; |
kvn@1637 | 268 | if (PrintMethodFlushing) { |
kvn@1637 | 269 | tty->print_cr("### handle full too often, turning off compiler"); |
kvn@1637 | 270 | } |
kvn@1637 | 271 | if (LogCompilation && (xtty != NULL)) { |
kvn@1637 | 272 | ttyLocker ttyl; |
kvn@1637 | 273 | xtty->begin_elem("disable_compiler flushing_interval='" UINT64_FORMAT "' live_blobs='" UINT32_FORMAT "' free_code_cache='" SIZE_FORMAT "'", |
kvn@1637 | 274 | curr_interval/1000, CodeCache::nof_blobs(), CodeCache::unallocated_capacity()); |
kvn@1637 | 275 | xtty->stamp(); |
kvn@1637 | 276 | xtty->end_elem(); |
kvn@1637 | 277 | } |
kvn@1637 | 278 | return; |
kvn@1637 | 279 | } |
kvn@1637 | 280 | } |
kvn@1637 | 281 | |
kvn@1637 | 282 | VM_HandleFullCodeCache op(is_full); |
kvn@1637 | 283 | VMThread::execute(&op); |
kvn@1637 | 284 | |
kvn@1637 | 285 | // rescan again as soon as possible |
kvn@1637 | 286 | _rescan = true; |
kvn@1637 | 287 | } |
kvn@1637 | 288 | |
kvn@1637 | 289 | void NMethodSweeper::speculative_disconnect_nmethods(bool is_full) { |
kvn@1637 | 290 | // If there was a race in detecting full code cache, only run |
kvn@1637 | 291 | // one vm op for it or keep the compiler shut off |
kvn@1637 | 292 | |
kvn@1637 | 293 | debug_only(jlong start = os::javaTimeMillis();) |
kvn@1637 | 294 | |
kvn@1637 | 295 | if ((!was_full()) && (is_full)) { |
kvn@1637 | 296 | if (!CodeCache::needs_flushing()) { |
kvn@1637 | 297 | if (PrintMethodFlushing) { |
kvn@1637 | 298 | tty->print_cr("### sweeper: Live blobs:" UINT32_FORMAT "/Free code cache:" SIZE_FORMAT " bytes, restarting compiler", |
kvn@1637 | 299 | CodeCache::nof_blobs(), CodeCache::unallocated_capacity()); |
kvn@1637 | 300 | } |
kvn@1637 | 301 | if (LogCompilation && (xtty != NULL)) { |
kvn@1637 | 302 | ttyLocker ttyl; |
kvn@1637 | 303 | xtty->begin_elem("restart_compiler live_blobs='" UINT32_FORMAT "' free_code_cache='" SIZE_FORMAT "'", |
kvn@1637 | 304 | CodeCache::nof_blobs(), CodeCache::unallocated_capacity()); |
kvn@1637 | 305 | xtty->stamp(); |
kvn@1637 | 306 | xtty->end_elem(); |
kvn@1637 | 307 | } |
kvn@1637 | 308 | CompileBroker::set_should_compile_new_jobs(CompileBroker::run_compilation); |
kvn@1637 | 309 | return; |
kvn@1637 | 310 | } |
kvn@1637 | 311 | } |
kvn@1637 | 312 | |
kvn@1637 | 313 | // Traverse the code cache trying to dump the oldest nmethods |
kvn@1637 | 314 | uint curr_max_comp_id = CompileBroker::get_compilation_id(); |
kvn@1637 | 315 | uint flush_target = ((curr_max_comp_id - _highest_marked) >> 1) + _highest_marked; |
kvn@1637 | 316 | if (PrintMethodFlushing && Verbose) { |
kvn@1637 | 317 | tty->print_cr("### Cleaning code cache: Live blobs:" UINT32_FORMAT "/Free code cache:" SIZE_FORMAT " bytes", |
kvn@1637 | 318 | CodeCache::nof_blobs(), CodeCache::unallocated_capacity()); |
kvn@1637 | 319 | } |
kvn@1637 | 320 | if (LogCompilation && (xtty != NULL)) { |
kvn@1637 | 321 | ttyLocker ttyl; |
kvn@1637 | 322 | xtty->begin_elem("start_cleaning_code_cache live_blobs='" UINT32_FORMAT "' free_code_cache='" SIZE_FORMAT "'", |
kvn@1637 | 323 | CodeCache::nof_blobs(), CodeCache::unallocated_capacity()); |
kvn@1637 | 324 | xtty->stamp(); |
kvn@1637 | 325 | xtty->end_elem(); |
kvn@1637 | 326 | } |
kvn@1637 | 327 | |
kvn@1637 | 328 | nmethod* nm = CodeCache::alive_nmethod(CodeCache::first()); |
kvn@1637 | 329 | jint disconnected = 0; |
kvn@1637 | 330 | jint made_not_entrant = 0; |
kvn@1637 | 331 | while ((nm != NULL)){ |
kvn@1637 | 332 | uint curr_comp_id = nm->compile_id(); |
kvn@1637 | 333 | |
kvn@1637 | 334 | // OSR methods cannot be flushed like this. Also, don't flush native methods |
kvn@1637 | 335 | // since they are part of the JDK in most cases |
kvn@1637 | 336 | if (nm->is_in_use() && (!nm->is_osr_method()) && (!nm->is_locked_by_vm()) && |
kvn@1637 | 337 | (!nm->is_native_method()) && ((curr_comp_id < flush_target))) { |
kvn@1637 | 338 | |
kvn@1637 | 339 | if ((nm->method()->code() == nm)) { |
kvn@1637 | 340 | // This method has not been previously considered for |
kvn@1637 | 341 | // unloading or it was restored already |
kvn@1637 | 342 | CodeCache::speculatively_disconnect(nm); |
kvn@1637 | 343 | disconnected++; |
kvn@1637 | 344 | } else if (nm->is_speculatively_disconnected()) { |
kvn@1637 | 345 | // This method was previously considered for preemptive unloading and was not called since then |
kvn@1637 | 346 | nm->method()->invocation_counter()->decay(); |
kvn@1637 | 347 | nm->method()->backedge_counter()->decay(); |
kvn@1637 | 348 | nm->make_not_entrant(); |
kvn@1637 | 349 | made_not_entrant++; |
kvn@1637 | 350 | } |
kvn@1637 | 351 | |
kvn@1637 | 352 | if (curr_comp_id > _highest_marked) { |
kvn@1637 | 353 | _highest_marked = curr_comp_id; |
kvn@1637 | 354 | } |
kvn@1637 | 355 | } |
kvn@1637 | 356 | nm = CodeCache::alive_nmethod(CodeCache::next(nm)); |
kvn@1637 | 357 | } |
kvn@1637 | 358 | |
kvn@1637 | 359 | if (LogCompilation && (xtty != NULL)) { |
kvn@1637 | 360 | ttyLocker ttyl; |
kvn@1637 | 361 | xtty->begin_elem("stop_cleaning_code_cache disconnected='" UINT32_FORMAT "' made_not_entrant='" UINT32_FORMAT "' live_blobs='" UINT32_FORMAT "' free_code_cache='" SIZE_FORMAT "'", |
kvn@1637 | 362 | disconnected, made_not_entrant, CodeCache::nof_blobs(), CodeCache::unallocated_capacity()); |
kvn@1637 | 363 | xtty->stamp(); |
kvn@1637 | 364 | xtty->end_elem(); |
kvn@1637 | 365 | } |
kvn@1637 | 366 | |
kvn@1637 | 367 | // Shut off compiler. Sweeper will run exiting from this safepoint |
kvn@1637 | 368 | // and turn it back on if it clears enough space |
kvn@1637 | 369 | if (was_full()) { |
kvn@1637 | 370 | _last_was_full = os::javaTimeMillis(); |
kvn@1637 | 371 | CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation); |
kvn@1637 | 372 | } |
kvn@1637 | 373 | |
kvn@1637 | 374 | // After two more traversals the sweeper will get rid of unrestored nmethods |
kvn@1637 | 375 | _was_full_traversal = _traversals; |
kvn@1637 | 376 | #ifdef ASSERT |
kvn@1637 | 377 | jlong end = os::javaTimeMillis(); |
kvn@1637 | 378 | if(PrintMethodFlushing && Verbose) { |
kvn@1637 | 379 | tty->print_cr("### sweeper: unload time: " INT64_FORMAT, end-start); |
kvn@1637 | 380 | } |
kvn@1637 | 381 | #endif |
kvn@1637 | 382 | } |