6888526: Linux getCurrentThreadCpuTime is drastically slower than Windows
Reviewed-by: dcubed, dholmes
/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
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//
// Defines Linux specific flags. They are not available on other platforms.
//
#define RUNTIME_OS_FLAGS(develop, develop_pd, product, product_pd, diagnostic, notproduct) \
product(bool, UseOprofile, false, \
"enable support for Oprofile profiler") \
\
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
// platforms, but they may have different default values on other platforms.
//
define_pd_global(bool, UseLargePages, false);
define_pd_global(bool, UseLargePagesIndividualAllocation, false);
define_pd_global(bool, UseOSErrorReporting, false);
define_pd_global(bool, UseThreadPriorities, true) ;