user/sven/linux.git/arch/mips/kernel/spinlock_test.c, branch v3.3.4Linux Kernel
https://git.stealer.net/cgit.cgi/user/sven/linux.git/atom?h=v3.3.42011-10-31T23:30:56Zmips: migrate core kernel file from module.h --> export.h2011-10-31T23:30:56ZPaul Gortmakerpaul.gortmaker@windriver.com2011-07-23T20:30:40Zurn:sha1:73bc256d47a23272ce1dd50b4de64a0ff23d01f1
These files are not modules, but were including module.h only for
EXPORT_SYMBOL and/or THIS_MODULE. Now that we have the lightweight
export.h, use it in these kinds of cases.
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
MIPS: Crazy spinlock speed test.2010-02-27T11:53:42ZDavid Daneyddaney@caviumnetworks.com2010-02-16T23:26:35Zurn:sha1:bba90760582d2563b28a4738fb785185a59e9e71
This is just a test program for raw_spinlocks. The main reason I
wrote it is to validate my spinlock changes that I sent in a previous
patch.
To use it enable CONFIG_DEBUG_FS and CONFIG_SPINLOCK_TEST then at run
time do:
# mount -t debugfs none /sys/kernel/debug/
# cat /sys/kernel/debug/mips/spin_single
# cat /sys/kernel/debug/mips/spin_multi
On my 600MHz octeon cn5860 (16 CPUs) I get
spin_single spin_multi
base 106885 247941
spinlock_patch 75194 219465
This shows that for uncontended locks the spinlock patch gives 41%
improvement and for contended locks 12% improvement (1/time).
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/969/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>