| commit | 30325d17715302a60c9afdaacaafaeb056b7e880 | [log] [tgz] |
|---|---|---|
| author | David Mosberger-Tang <davidm@hpl.hp.com> | Mon Apr 25 13:03:16 2005 -0700 |
| committer | Tony Luck <tony.luck@intel.com> | Mon Apr 25 13:03:16 2005 -0700 |
| tree | 8872d59f841a5338e04f15c1183b8fd2ad4bfbb3 | |
| parent | e8d1cb2f280aa53e1c75c8b5fcbf80b3481d0caa [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>