Commit bba90760 authored by Committed by Ralf Baechle
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 <firstname.lastname@example.org> To: email@example.com Patchwork: http://patchwork.linux-mips.org/patch/969/Signed-off-by: Ralf Baechle <firstname.lastname@example.org>
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