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linux/arch/mips/kernel
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David Daney bba9076058 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>
2010-02-27 12:53:42 +01:00
..
cpufreq
MIPS: Loongson 2F: Add CPU frequency scaling support
2009-12-17 01:57:20 +00:00
.gitignore
[MIPS] Ignore vmlinux.lds generated files
2008-08-26 09:10:27 +01:00
8250-platform.c
[MIPS] Put an end to <asm/serial.h>'s long and annyoing existence
2007-07-10 17:33:01 +01:00
asm-offsets.c
MIPS: Two-level pagetables for 64-bit kernels with 64KB pages.
2010-02-27 12:53:03 +01:00
binfmt_elfn32.c
remove div_long_long_rem
2008-05-01 08:03:58 -07:00
binfmt_elfo32.c
MIPS: 64-bit: Fix o32 core dump
2009-07-03 15:45:27 +01:00
branch.c
MIPS: Compute branch returns for Cavium OCTEON specific branch instructions.
2009-01-11 09:57:24 +00:00
cevt-bcm1480.c
MIPS: Add IRQF_TIMER flag for timer interrupts
2009-11-02 12:00:02 +01:00
cevt-ds1287.c
MIPS: Add IRQF_TIMER flag for timer interrupts
2009-11-02 12:00:02 +01:00
cevt-gt641xx.c
MIPS: GT641xx: Convert timer lock to raw spinlock.
2010-02-27 12:53:37 +01:00
cevt-r4k.c
MIPS: PowerTV: Fix support for timer interrupts with > 64 external IRQs
2010-01-28 00:03:31 +01:00
cevt-sb1250.c
MIPS: Add IRQF_TIMER flag for timer interrupts
2009-11-02 12:00:02 +01:00
cevt-smtc.c
MIPS: SMTC: Fix lockup in smtc_distribute_timer
2009-11-13 18:10:38 +01:00
cevt-txx9.c
MIPS: Add IRQF_TIMER flag for timer interrupts
2009-11-02 12:00:02 +01:00
cpu-bugs64.c
MIPS: Remove useless zero initializations.
2009-09-17 20:07:51 +02:00
cpu-probe.c
MIPS: Give Octeon+ CPUs their own cputype.
2010-02-27 12:53:26 +01:00
csrc-bcm1480.c
clocksource: pass clocksource to read() callback
2009-04-21 13:41:47 -07:00
csrc-ioasic.c
Update Yoichi Yuasa's e-mail address
2009-07-03 15:45:29 +01:00
csrc-powertv.c
MIPS: PowerTV: Base files for Cisco PowerTV platform
2009-12-17 01:57:17 +00:00
csrc-r4k.c
clocksource: pass clocksource to read() callback
2009-04-21 13:41:47 -07:00
csrc-sb1250.c
clocksource: pass clocksource to read() callback
2009-04-21 13:41:47 -07:00
early_printk.c
[MIPS] fix sparse warning about setup_early_printk()
2008-07-15 18:44:29 +01:00
entry.S
[MIPS] SMTC: Close tiny holes in the SMTC IPI replay system.
2008-10-03 17:58:58 +01:00
ftrace.c
MIPS: Loongson: Change the Email address of Wu Zhangjin
2010-02-27 12:53:12 +01:00
genex.S
MIPS: Read watch registers with interrupts disabled.
2009-01-30 21:32:58 +00:00
gpio_txx9.c
[MIPS] txx9: Make gpio_txx9 entirely spinlock-safe
2008-07-15 18:44:34 +01:00
head.S
MIPS: Avoid potential hazard on Context register
2009-11-02 12:00:07 +01:00
i8253.c
MIPS: Add IRQF_TIMER flag for timer interrupts
2009-11-02 12:00:02 +01:00
i8259.c
MIPS: i8259: Convert IRQ controller lock to raw spinlock.
2010-02-27 12:53:38 +01:00
init_task.c
Use new __init_task_data macro in arch init_task.c files.
2009-09-21 06:27:08 +02:00
irq_cpu.c
MIPS: Enable GENERIC_HARDIRQS_NO__DO_IRQ for all platforms
2009-03-30 14:49:44 +02:00
irq_txx9.c
MIPS: Eleminate filenames from comments
2009-08-03 17:52:40 +01:00
irq-gic.c
MIPS: GIC: Random fixes and enhancements.
2009-11-02 12:00:06 +01:00
irq-gt641xx.c
MIPS: GT641xx: Convert IRQ controller lock to raw spinlock.
2010-02-27 12:53:31 +01:00
irq-msc01.c
MIPS: Enable GENERIC_HARDIRQS_NO__DO_IRQ for all platforms
2009-03-30 14:49:44 +02:00
irq-rm7000.c
[MIPS] Fix broken rm7000/rm9000 interrupt handling
2008-02-19 17:01:31 +00:00
irq-rm9000.c
on_each_cpu(): kill unused 'retry' parameter
2008-06-26 11:24:38 +02:00
irq.c
MIPS: Tracing: Add IRQENTRY_EXIT section for MIPS
2009-12-17 01:57:24 +00:00
kgdb.c
MIPS: Build fix - include <linux/smp.h> into all smp_processor_id() users.
2009-06-24 18:34:39 +01:00
kspd.c
vfs: Implement proper O_SYNC semantics
2009-12-10 15:02:50 +01:00
linux32.c
MIPS: Don't include <linux/smp_lock.h> unnecessarily.
2010-02-27 12:52:57 +01:00
machine_kexec.c
[MIPS] Unconditionally writeback and invalidate caches on kexec.
2007-08-27 02:16:59 +01:00
Makefile
MIPS: Crazy spinlock speed test.
2010-02-27 12:53:42 +01:00
mcount.S
MIPS: Loongson: Change the Email address of Wu Zhangjin
2010-02-27 12:53:12 +01:00
mips_ksyms.c
MIPS: Tracing: Add static function tracer support for MIPS
2009-12-17 01:57:21 +00:00
mips-mt-fpaff.c
MIPS: Remove useless zero initializations.
2009-09-17 20:07:51 +02:00
mips-mt.c
MIPS: Remove useless zero initializations.
2009-09-17 20:07:51 +02:00
module.c
MIPS: Module: Make error messages unique.
2009-08-03 17:52:48 +01:00
octeon_switch.S
MIPS: Nuke trailing blank lines
2010-02-27 12:53:14 +01:00
proc.c
MIPS: Eleminate filenames from comments
2009-08-03 17:52:40 +01:00
process.c
MIPS: Avoid clobbering struct pt_regs in kthreads
2009-08-03 17:52:41 +01:00
ptrace32.c
headers: smp_lock.h redux
2009-07-12 12:22:34 -07:00
ptrace.c
MIPS: Ptrace support for HARDWARE_WATCHPOINTS
2008-10-11 16:18:57 +01:00
r4k_fpu.S
[MIPS] Check FCSR for pending interrupts, alternative version
2007-03-17 01:03:25 +00:00
r4k_switch.S
MIPS: Consolidate all CONFIG_CPU_HAS_LLSC use in a single C file.
2009-09-17 20:07:49 +02:00
r2300_fpu.S
…
r2300_switch.S
MIPS: Consolidate all CONFIG_CPU_HAS_LLSC use in a single C file.
2009-09-17 20:07:49 +02:00
r6000_fpu.S
…
relocate_kernel.S
[MIPS] Kexec: Fix several 64-bit bugs.
2007-07-31 21:35:36 +01:00
reset.c
[MIPS] Export pm_power_off
2006-12-10 21:52:11 +00:00
rtlx.c
MIPS: Don't include <linux/smp_lock.h> unnecessarily.
2010-02-27 12:52:57 +01:00
scall32-o32.S
net: Introduce recvmmsg socket syscall
2009-10-12 23:40:10 -07:00
scall64-64.S
net: Introduce recvmmsg socket syscall
2009-10-12 23:40:10 -07:00
scall64-n32.S
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6
2009-12-08 07:55:01 -08:00
scall64-o32.S
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6
2009-12-08 07:55:01 -08:00
setup.c
MIPS: Fix and enhance built-in kernel command line
2009-12-17 01:57:35 +00:00
signal32.c
MIPS: Cleanup signal code initialization
2009-12-17 01:57:32 +00:00
signal_n32.c
[MIPS] Fix "no space between function name and open parenthesis" warnings.
2007-10-11 23:46:15 +01:00
signal-common.h
[MIPS] replace remaining __FUNCTION__ occurrences
2008-04-28 17:14:27 +01:00
signal.c
MIPS: Cleanup signal code initialization
2009-12-17 01:57:32 +00:00
smp-cmp.c
cpumask: Use accessors for cpu_*_mask: mips
2009-09-24 09:34:48 +09:30
smp-mt.c
cpumask: Use accessors for cpu_*_mask: mips
2009-09-24 09:34:48 +09:30
smp-up.c
cpumask: arch_send_call_function_ipi_mask: mips
2009-09-24 09:34:45 +09:30
smp.c
MIPS: Tracing: Add IRQENTRY_EXIT section for MIPS
2009-12-17 01:57:24 +00:00
smtc-asm.S
[MIPS] SMTC: Don't set and restore irqregs ptr from self_ipi.
2007-06-11 18:20:53 +01:00
smtc-proc.c
[MIPS] SMP: Call platform methods via ops structure.
2008-01-29 10:14:57 +00:00
smtc.c
MIPS: Tracing: Add IRQENTRY_EXIT section for MIPS
2009-12-17 01:57:24 +00:00
spinlock_test.c
MIPS: Crazy spinlock speed test.
2010-02-27 12:53:42 +01:00
spram.c
MIPS: SPRAM: Clean up support code a little
2009-11-02 12:00:05 +01:00
stacktrace.c
MIPS: Eleminate filenames from comments
2009-08-03 17:52:40 +01:00
sync-r4k.c
MIPS: CMP: Update sync-r4k for current kernel
2009-07-03 15:45:27 +01:00
syscall.c
fix broken aliasing checks for MAP_FIXED on sparc32, mips, arm and sh
2009-12-11 06:44:59 -05:00
time.c
mips: Use generic mult/shift factor calculation for clocks
2009-11-13 20:46:24 +01:00
topology.c
MIPS: Add arch generic CPU hotplug
2009-06-24 18:34:40 +01:00
traps.c
MIPS: Deal with larger physical offsets
2010-02-27 12:53:19 +01:00
unaligned.c
MIPS: Modularize COP2 handling
2009-12-17 01:57:30 +00:00
vmlinux.lds.S
MIPS: Tracing: Add IRQENTRY_EXIT section for MIPS
2009-12-17 01:57:24 +00:00
vpe.c
MIPS: Don't include <linux/smp_lock.h> unnecessarily.
2010-02-27 12:52:57 +01:00
watch.c
MIPS: Add HARDWARE_WATCHPOINTS definitions and support code.
2008-10-11 16:18:56 +01:00