Mercurial > hg > graal-jvmci-8
changeset 1679:3d90023429ec
6888526: Linux getCurrentThreadCpuTime is drastically slower than Windows
Reviewed-by: dcubed, dholmes
author | aph |
---|---|
date | Wed, 28 Jul 2010 17:38:21 +0100 |
parents | 7f0fdccac34f |
children | a64438a2b7e8 |
files | src/os/linux/vm/globals_linux.hpp src/share/vm/runtime/arguments.cpp |
diffstat | 2 files changed, 10 insertions(+), 3 deletions(-) [+] |
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--- a/src/os/linux/vm/globals_linux.hpp Sun Jul 25 07:31:50 2010 -0700 +++ b/src/os/linux/vm/globals_linux.hpp Wed Jul 28 17:38:21 2010 +0100 @@ -29,9 +29,10 @@ product(bool, UseOprofile, false, \ "enable support for Oprofile profiler") \ \ - product(bool, UseLinuxPosixThreadCPUClocks, false, \ - "enable fast Linux Posix clocks where available") \ - + product(bool, UseLinuxPosixThreadCPUClocks, true, \ + "enable fast Linux Posix clocks where available") +// NB: The default value of UseLinuxPosixThreadCPUClocks may be +// overridden in Arguments::parse_each_vm_init_arg. // // Defines Linux-specific default values. The flags are available on all
--- a/src/share/vm/runtime/arguments.cpp Sun Jul 25 07:31:50 2010 -0700 +++ b/src/share/vm/runtime/arguments.cpp Wed Jul 28 17:38:21 2010 +0100 @@ -2593,6 +2593,12 @@ FLAG_IS_DEFAULT(UseVMInterruptibleIO)) { FLAG_SET_DEFAULT(UseVMInterruptibleIO, true); } +#ifdef LINUX + if (JDK_Version::current().compare_major(6) <= 0 && + FLAG_IS_DEFAULT(UseLinuxPosixThreadCPUClocks)) { + FLAG_SET_DEFAULT(UseLinuxPosixThreadCPUClocks, false); + } +#endif // LINUX return JNI_OK; }