Mercurial > hg > graal-jvmci-8
comparison src/share/vm/runtime/globals.hpp @ 642:660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
Summary: Use zero based compressed oops if java heap is below 32gb and unscaled compressed oops if java heap is below 4gb.
Reviewed-by: never, twisti, jcoomes, coleenp
author | kvn |
---|---|
date | Thu, 12 Mar 2009 10:37:46 -0700 |
parents | c6c601a0f2d6 |
children | c771b7f43bbf |
comparison
equal
deleted
inserted
replaced
641:6af0a709d52b | 642:660978a2a31a |
---|---|
301 \ | 301 \ |
302 lp64_product(bool, UseCompressedOops, false, \ | 302 lp64_product(bool, UseCompressedOops, false, \ |
303 "Use 32-bit object references in 64-bit VM. " \ | 303 "Use 32-bit object references in 64-bit VM. " \ |
304 "lp64_product means flag is always constant in 32 bit VM") \ | 304 "lp64_product means flag is always constant in 32 bit VM") \ |
305 \ | 305 \ |
306 lp64_product(bool, CheckCompressedOops, trueInDebug, \ | 306 notproduct(bool, CheckCompressedOops, true, \ |
307 "generate checks in encoding/decoding code") \ | 307 "generate checks in encoding/decoding code in debug VM") \ |
308 \ | 308 \ |
309 product(bool, UseImplicitNullCheckForNarrowOop, true, \ | 309 product_pd(uintx, HeapBaseMinAddress, \ |
310 "generate implicit null check in indexed addressing mode.") \ | 310 "OS specific low limit for heap base address") \ |
311 \ | |
312 diagnostic(bool, PrintCompressedOopsMode, false, \ | |
313 "Print compressed oops base address and encoding mode") \ | |
311 \ | 314 \ |
312 /* UseMembar is theoretically a temp flag used for memory barrier \ | 315 /* UseMembar is theoretically a temp flag used for memory barrier \ |
313 * removal testing. It was supposed to be removed before FCS but has \ | 316 * removal testing. It was supposed to be removed before FCS but has \ |
314 * been re-added (see 6401008) */ \ | 317 * been re-added (see 6401008) */ \ |
315 product(bool, UseMembar, false, \ | 318 product(bool, UseMembar, false, \ |