1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/os_cpu/solaris_sparc/vm/threadLS_solaris_sparc.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,71 @@
1.4 +/*
1.5 + * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef OS_CPU_SOLARIS_SPARC_VM_THREADLS_SOLARIS_SPARC_HPP
1.29 +#define OS_CPU_SOLARIS_SPARC_VM_THREADLS_SOLARIS_SPARC_HPP
1.30 +
1.31 +public:
1.32 + // Java Thread - force inlining
1.33 + static inline Thread* thread() ;
1.34 +
1.35 +private:
1.36 + static Thread* _get_thread_cache[]; // index by [(raw_id>>9)^(raw_id>>20) % _pd_cache_size]
1.37 + static Thread* get_thread_via_cache_slowly(uintptr_t raw_id, int index);
1.38 +
1.39 + NOT_PRODUCT(static int _tcacheHit;)
1.40 + NOT_PRODUCT(static int _tcacheMiss;)
1.41 +
1.42 +public:
1.43 +
1.44 + // Print cache hit/miss statistics
1.45 + static void print_statistics() PRODUCT_RETURN;
1.46 +
1.47 + enum Constants {
1.48 + _pd_cache_size = 256*2 // projected typical # of threads * 2
1.49 + };
1.50 +
1.51 + static void set_thread_in_slot (Thread *) ;
1.52 +
1.53 + static uintptr_t pd_raw_thread_id() {
1.54 + return _raw_thread_id();
1.55 + }
1.56 +
1.57 + static int pd_cache_index(uintptr_t raw_id) {
1.58 + // Hash function: From email from Dave:
1.59 + // The hash function deserves an explanation. %g7 points to libthread's
1.60 + // "thread" structure. On T1 the thread structure is allocated on the
1.61 + // user's stack (yes, really!) so the ">>20" handles T1 where the JVM's
1.62 + // stack size is usually >= 1Mb. The ">>9" is for T2 where Roger allocates
1.63 + // globs of thread blocks contiguously. The "9" has to do with the
1.64 + // expected size of the T2 thread structure. If these constants are wrong
1.65 + // the worst thing that'll happen is that the hit rate for heavily threaded
1.66 + // apps won't be as good as it could be. If you want to burn another
1.67 + // shift+xor you could mix together _all of the %g7 bits to form the hash,
1.68 + // but I think that's excessive. Making the change above changed the
1.69 + // T$ miss rate on SpecJBB (on a 16X system) from about 3% to imperceptible.
1.70 + uintptr_t ix = (int) (((raw_id >> 9) ^ (raw_id >> 20)) % _pd_cache_size);
1.71 + return ix;
1.72 + }
1.73 +
1.74 +#endif // OS_CPU_SOLARIS_SPARC_VM_THREADLS_SOLARIS_SPARC_HPP
