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comparison src/share/vm/oops/methodDataOop.hpp @ 5114:dad1ac9dba7d

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finished first implementation of disabling runtime feedback selectively based on deoptimization history
author Christian Haeubl <christian.haeubl@oracle.com>
date Mon, 19 Mar 2012 14:43:15 -0700
parents 422c979ff392
children
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5113:e6a45067e42c 5114:dad1ac9dba7d
1483 static uint trap_reason_limit() { return _trap_hist_limit; } 1483 static uint trap_reason_limit() { return _trap_hist_limit; }
1484 static uint trap_count_limit() { return _trap_hist_mask; } 1484 static uint trap_count_limit() { return _trap_hist_mask; }
1485 uint inc_trap_count(int reason) { 1485 uint inc_trap_count(int reason) {
1486 // Count another trap, anywhere in this method. 1486 // Count another trap, anywhere in this method.
1487 assert(reason >= 0, "must be single trap"); 1487 assert(reason >= 0, "must be single trap");
1488 if ((uint)reason < _trap_hist_limit) { 1488 assert((uint)reason < _trap_hist_limit, "oob");
1489 uint cnt1 = 1 + _trap_hist._array[reason]; 1489 uint cnt1 = 1 + _trap_hist._array[reason];
1490 if ((cnt1 & _trap_hist_mask) != 0) { // if no counter overflow... 1490 if ((cnt1 & _trap_hist_mask) != 0) { // if no counter overflow...
1491 _trap_hist._array[reason] = cnt1; 1491 _trap_hist._array[reason] = cnt1;
1492 return cnt1; 1492 return cnt1;
1493 } else {
1494 return _trap_hist_mask + (++_nof_overflow_traps);
1495 }
1496 } else { 1493 } else {
1497 // Could not represent the count in the histogram. 1494 return _trap_hist_mask + (++_nof_overflow_traps);
1498 return (++_nof_overflow_traps);
1499 } 1495 }
1500 } 1496 }
1501 1497
1502 uint overflow_trap_count() const { 1498 uint overflow_trap_count() const {
1503 return _nof_overflow_traps; 1499 return _nof_overflow_traps;
1514 void inc_decompile_count(); 1510 void inc_decompile_count();
1515 1511
1516 // Support for code generation 1512 // Support for code generation
1517 static ByteSize data_offset() { 1513 static ByteSize data_offset() {
1518 return byte_offset_of(methodDataOopDesc, _data[0]); 1514 return byte_offset_of(methodDataOopDesc, _data[0]);
1515 }
1516
1517 static ByteSize trap_history_offset() {
1518 return byte_offset_of(methodDataOopDesc, _trap_hist._array);
1519 } 1519 }
1520 1520
1521 static ByteSize invocation_counter_offset() { 1521 static ByteSize invocation_counter_offset() {
1522 return byte_offset_of(methodDataOopDesc, _invocation_counter); 1522 return byte_offset_of(methodDataOopDesc, _invocation_counter);
1523 } 1523 }