Mercurial > hg > graal-compiler
annotate src/cpu/x86/vm/icache_x86.cpp @ 1837:c99c53f07c14
6692906: CMS: parallel concurrent marking may be prone to hanging or stalling mutators for periods of time
Summary: Inserted missing yield(check)s in closures used during the work-stealing phase of parallel concurrent marking, a missing synchronous yield-request in the cms perm gen allocation path, and a terminator-terminator for the offer_termination invocation that monitors the yield status of the concurrent marking task. Elaborated some documentation comments and made some task queue termination loop flags configurable at start-up to aid debugging in the field.
Reviewed-by: jmasa, johnc, poonam
author | ysr |
---|---|
date | Wed, 29 Sep 2010 16:17:02 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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20 * or visit www.oracle.com if you need additional information or have any |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_icache_x86.cpp.incl" | |
27 | |
28 #define __ _masm-> | |
29 | |
30 void ICacheStubGenerator::generate_icache_flush(ICache::flush_icache_stub_t* flush_icache_stub) { | |
31 StubCodeMark mark(this, "ICache", "flush_icache_stub"); | |
32 | |
33 address start = __ pc(); | |
34 #ifdef AMD64 | |
35 | |
36 const Register addr = c_rarg0; | |
37 const Register lines = c_rarg1; | |
38 const Register magic = c_rarg2; | |
39 | |
40 Label flush_line, done; | |
41 | |
42 __ testl(lines, lines); | |
43 __ jcc(Assembler::zero, done); | |
44 | |
45 // Force ordering wrt cflush. | |
46 // Other fence and sync instructions won't do the job. | |
47 __ mfence(); | |
48 | |
49 __ bind(flush_line); | |
50 __ clflush(Address(addr, 0)); | |
304 | 51 __ addptr(addr, ICache::line_size); |
0 | 52 __ decrementl(lines); |
53 __ jcc(Assembler::notZero, flush_line); | |
54 | |
55 __ mfence(); | |
56 | |
57 __ bind(done); | |
58 | |
59 #else | |
60 const Address magic(rsp, 3*wordSize); | |
61 __ lock(); __ addl(Address(rsp, 0), 0); | |
62 #endif // AMD64 | |
304 | 63 __ movptr(rax, magic); // Handshake with caller to make sure it happened! |
0 | 64 __ ret(0); |
65 | |
66 // Must be set here so StubCodeMark destructor can call the flush stub. | |
67 *flush_icache_stub = (ICache::flush_icache_stub_t)start; | |
68 } | |
69 | |
70 #undef __ |