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authorDavid Daney <ddaney@caviumnetworks.com>2010-02-16 15:26:35 -0800
committerRalf Baechle <ralf@linux-mips.org>2010-02-27 12:53:42 +0100
commitbba90760582d2563b28a4738fb785185a59e9e71 (patch)
treeb1efda424d8ab0ef24220ce4da484819d749e2b2 /arch/mips/Kconfig.debug
parent500c2e1fdbcc2b273bd4c695a9b8ac8196f61614 (diff)
downloadlinux-bba90760582d2563b28a4738fb785185a59e9e71.tar.gz
MIPS: Crazy spinlock speed test.
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>
Diffstat (limited to 'arch/mips/Kconfig.debug')
-rw-r--r--arch/mips/Kconfig.debug7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/mips/Kconfig.debug b/arch/mips/Kconfig.debug
index 32a010d5edb..43dc2799773 100644
--- a/arch/mips/Kconfig.debug
+++ b/arch/mips/Kconfig.debug
@@ -121,4 +121,11 @@ config DEBUG_ZBOOT
to reduce the kernel image size and speed up the booting procedure a
little.
+config SPINLOCK_TEST
+ bool "Enable spinlock timing tests in debugfs"
+ depends on DEBUG_FS
+ default n
+ help
+ Add several files to the debugfs to test spinlock speed.
+
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