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authorDavid Mosberger-Tang <davidm@hpl.hp.com>2005-04-25 13:03:16 -0700
committerTony Luck <tony.luck@intel.com>2005-04-25 13:03:16 -0700
commit30325d17715302a60c9afdaacaafaeb056b7e880 (patch)
tree8872d59f841a5338e04f15c1183b8fd2ad4bfbb3 /arch/x86_64
parente8d1cb2f280aa53e1c75c8b5fcbf80b3481d0caa (diff)
[IA64] speed up syscall path a bit more
Recently I noticed that clearing ar.ssd/ar.csd right before srlz.d is causing significant stalling in the syscall path. The patch below fixes that by moving the register-writes after srlz.d. On a Madison, this drops break-based getpid() from 241 to 226 cycles (-15 cycles). Signed-off-by: David Mosberger-Tang <davidm@hpl.hp.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/x86_64')
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