From bba90760582d2563b28a4738fb785185a59e9e71 Mon Sep 17 00:00:00 2001 From: David Daney Date: Tue, 16 Feb 2010 15:26:35 -0800 Subject: 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 To: linux-mips@linux-mips.org Patchwork: http://patchwork.linux-mips.org/patch/969/ Signed-off-by: Ralf Baechle --- arch/mips/kernel/Makefile | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/mips/kernel/Makefile') diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile index 9326af5..ef20957 100644 --- a/arch/mips/kernel/Makefile +++ b/arch/mips/kernel/Makefile @@ -93,6 +93,7 @@ obj-$(CONFIG_GPIO_TXX9) += gpio_txx9.o obj-$(CONFIG_KEXEC) += machine_kexec.o relocate_kernel.o obj-$(CONFIG_EARLY_PRINTK) += early_printk.o +obj-$(CONFIG_SPINLOCK_TEST) += spinlock_test.o CFLAGS_cpu-bugs64.o = $(shell if $(CC) $(KBUILD_CFLAGS) -Wa,-mdaddi -c -o /dev/null -xc /dev/null >/dev/null 2>&1; then echo "-DHAVE_AS_SET_DADDI"; fi) -- cgit v1.1