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b8a83fcb78c859b99807af4c8b0ab09f0f827a40
linux/arch/sparc/kernel
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Pavel Tatashin b8a83fcb78 sparc64: access tick function from variable 
In timer_64.c tick functions are access via pointer (tick_ops), every time
clock is read, there is one extra load to get to the function.

This patch optimizes it, by accessing functions pointer from value.

Current ched_clock():
sethi  %hi(0xb9b400), %g1
ldx  [ %g1 + 0x250 ], %g1  ! <tick_ops>
ldx  [ %g1 ], %g1
call  %g1
nop
sethi  %hi(0xb9b400), %g1
ldx  [ %g1 + 0x300 ], %g1  ! <timer_ticks_per_nsec_quotient>
mulx  %o0, %g1, %g1
rett  %i7 + 8
srlx  %g1, 0xa, %o0

New sched_clock():
sethi  %hi(0xb9b400), %g1
ldx  [ %g1 + 0x340 ], %g1
call  %g1
nop
sethi  %hi(0xb9b400), %g1
ldx  [ %g1 + 0x378 ], %g1
mulx  %o0, %g1, %g1
rett  %i7 + 8
srlx  %g1, 0xa, %o0

Before three loads, now two loads.

Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com>
Reviewed-by: Shannon Nelson <shannon.nelson@oracle.com>
Reviewed-by: Steven Sistare <steven.sistare@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-06-12 15:44:02 -07:00
..
.gitignore
…
apc.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
asm-offsets.c
sched/headers: Prepare to remove the <linux/mm_types.h> dependency from <linux/sched.h>
2017-03-02 08:42:37 +01:00
audit.c
sparc: Convert naked unsigned uses to unsigned int
2016-03-20 21:28:58 -07:00
auxio_32.c
sparc32: fix sparse warning in auxio_32.c
2014-05-18 19:01:27 -07:00
auxio_64.c
sparc: kernel: drop owner assignment from platform_drivers
2014-10-20 16:20:15 +02:00
btext.c
sparc64: fix sparse warning in btext.c
2014-05-18 19:01:30 -07:00
central.c
sparc: kernel: drop owner assignment from platform_drivers
2014-10-20 16:20:15 +02:00
cherrs.S
sparc64: Fix bootup regressions on some Kconfig combinations.
2016-04-27 17:27:37 -04:00
chmc.c
sparc: kernel: drop owner assignment from platform_drivers
2014-10-20 16:20:15 +02:00
compat_audit.c
sparc: Convert naked unsigned uses to unsigned int
2016-03-20 21:28:58 -07:00
cpu.c
sparc64: recognize and support Sonoma CPU type
2016-04-21 16:43:47 -04:00
cpumap.c
sparc64: recognize and support Sonoma CPU type
2016-04-21 16:43:47 -04:00
cpumap.h
sparc: drop use of extern for prototypes in arch/sparc/*
2014-05-18 19:01:29 -07:00
devices.c
sparc32: drop tadpole specific code
2014-05-18 19:01:29 -07:00
dma.c
…
ds.c
sparc64: Fix build warnings with gcc 7.
2017-06-01 09:42:46 -07:00
dtlb_miss.S
…
dtlb_prot.S
sparc: Don't leak context bits into thread->fault_address
2016-07-27 17:50:26 -07:00
ebus.c
sparc: delete non-required instances of include <linux/init.h>
2014-01-28 23:38:23 -08:00
entry.h
sparc: Resolve conflict between sparc v9 and M7 on usage of bit 9 of TTE
2015-05-31 22:15:01 -07:00
entry.S
sparc: move exports to definitions
2016-08-07 23:55:43 -04:00
etrap_32.S
sparc32: introduce support for run-time patching for all shared assembler code
2012-05-27 23:52:49 -07:00
etrap_64.S
sparc64: clear syscall_noerror on the entry to syscall, not on the exit
2012-10-14 19:26:52 -04:00
fpu_traps.S
sparc64: Fix bootup regressions on some Kconfig combinations.
2016-04-27 17:27:37 -04:00
ftrace.c
sparc/ftrace: Fix ftrace graph time measurement
2017-05-17 12:07:47 -07:00
getsetcc.S
…
head_32.S
sparc32: kill __ret_efault()
2017-03-28 18:24:00 -04:00
head_64.S
sparc64: fix fault handling in NGbzero.S and GENbzero.S
2017-05-09 12:16:25 -07:00
helpers.S
sparc: move exports to definitions
2016-08-07 23:55:43 -04:00
hvapi.c
sparc64: Add ATU (new IOMMU) support
2016-11-18 11:16:59 -08:00
hvcalls.S
sparc: move exports to definitions
2016-08-07 23:55:43 -04:00
hvtramp.S
sparc64: Fix register corruption in top-most kernel stack frame during boot.
2014-10-24 09:52:49 -07:00
idprom.c
net: Add eth_platform_get_mac_address() helper.
2016-01-06 16:31:56 -05:00
iommu_common.h
sparc: drop duplicate header scatterlist.h
2016-11-19 10:43:07 -05:00
iommu.c
treewide: Constify most dma_map_ops structures
2017-01-24 12:23:35 -05:00
ioport.c
treewide: Constify most dma_map_ops structures
2017-01-24 12:23:35 -05:00
irq_32.c
sparc32: off by ones in BUG_ON()
2016-07-27 22:53:17 -07:00
irq_64.c
arch/sparc: support NR_CPUS = 4096
2017-06-06 16:41:47 -04:00
irq.h
sparc: drop use of extern for prototypes in arch/sparc/*
2014-05-18 19:01:29 -07:00
itlb_miss.S
…
ivec.S
…
jump_label.c
sparc: Handle negative offsets in arch_jump_label_transform
2016-10-25 19:11:17 -07:00
kernel.h
sparc64: delete old wrap code
2017-06-06 13:45:29 -07:00
kgdb_32.c
sparc32: use proper prototype for trapbase
2016-05-20 17:55:41 -07:00
kgdb_64.c
sparc64: fix sparse warning in kgdb_64.c
2014-05-18 19:01:34 -07:00
kprobes.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
kstack.h
…
ktlb.S
sparc: Don't leak context bits into thread->fault_address
2016-07-27 17:50:26 -07:00
ldc.c
sparc64: print debug messages when reading from LDC channel
2017-06-10 14:10:55 -07:00
led.c
sparc: use memdup_user_nul in sun4m LED driver
2017-05-09 12:16:25 -07:00
leon_kernel.c
sparc: leon: Fix a retry loop in leon_init_timers()
2016-12-11 18:15:49 -08:00
leon_pci_grpci1.c
genirq: Remove irq argument from irq flow handlers
2015-09-16 15:47:51 +02:00
leon_pci_grpci2.c
genirq: Remove irq argument from irq flow handlers
2015-09-16 15:47:51 +02:00
leon_pci.c
PCI: Cleanup control flow
2015-03-19 10:17:22 -05:00
leon_pmc.c
sparc32: fix sparse warnings in leon_pmc.c
2014-04-29 01:12:27 -04:00
leon_smp.c
sched/headers: Move task->mm handling methods to <linux/sched/mm.h>
2017-03-03 01:43:28 +01:00
Makefile
sparc64:Support User Probes for sparc
2016-12-11 18:01:51 -08:00
mdesc.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
misctrap.S
arch/sparc: Avoid DCTI Couples
2017-03-27 21:51:40 -07:00
module.c
mm: vmalloc: pass additional vm_flags to __vmalloc_node_range()
2015-02-13 21:21:42 -08:00
nmi.c
sparc: implement watchdog_nmi_enable and watchdog_nmi_disable
2016-12-14 16:04:08 -08:00
of_device_32.c
sparc32: rename sparc_irq_config to sparc_config
2012-04-15 10:28:49 -07:00
of_device_64.c
devicetree: add helper inline for retrieving a node's full name
2012-07-06 07:16:34 -05:00
of_device_common.c
sparc: fix sparse warnings in of_device_common.c
2014-04-29 01:12:27 -04:00
of_device_common.h
…
pci_common.c
sparc/PCI: Add mem64 resource parsing for root bus
2015-10-29 17:35:46 -05:00
pci_fire.c
sparc: kernel: drop owner assignment from platform_drivers
2014-10-20 16:20:15 +02:00
pci_impl.h
sparc/PCI: Add mem64 resource parsing for root bus
2015-10-29 17:35:46 -05:00
pci_msi.c
PCI/MSI: Rename mask/unmask_msi_irq treewide
2014-11-23 13:01:45 +01:00
pci_psycho.c
sparc: kernel: drop owner assignment from platform_drivers
2014-10-20 16:20:15 +02:00
pci_sabre.c
sparc: kernel: drop owner assignment from platform_drivers
2014-10-20 16:20:15 +02:00
pci_schizo.c
Merge tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
2014-12-14 16:10:09 -08:00
pci_sun4v_asm.S
sparc64: Enable sun4v dma ops to use IOMMU v2 APIs
2016-11-18 11:17:00 -08:00
pci_sun4v.c
treewide: Constify most dma_map_ops structures
2017-01-24 12:23:35 -05:00
pci_sun4v.h
sparc64: Enable sun4v dma ops to use IOMMU v2 APIs
2016-11-18 11:17:00 -08:00
pci.c
PCI: Add BAR index argument to pci_mmap_page_range()
2017-04-20 08:47:47 -05:00
pcic.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
pcr.c
sparc: perf: Add support M7 processor
2015-03-19 18:54:49 -07:00
perf_event.c
perf core: Add a 'nr' field to perf_event_callchain_context
2016-05-16 23:11:51 -03:00
pmc.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
power.c
sparc: kernel: use builtin_platform_driver
2016-12-11 18:15:48 -08:00
process_32.c
sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h>
2017-03-02 08:42:36 +01:00
process_64.c
sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h>
2017-03-02 08:42:36 +01:00
prom_32.c
…
prom_64.c
sparc64: fix sparse warning in prom_64.c
2014-05-18 19:01:31 -07:00
prom_common.c
of: Fix locking vs. interrupts
2013-06-13 22:12:14 +01:00
prom_irqtrans.c
…
prom.h
sparc: drop use of extern for prototypes in arch/sparc/*
2014-05-18 19:01:29 -07:00
psycho_common.c
…
psycho_common.h
sparc: drop use of extern for prototypes in arch/sparc/*
2014-05-18 19:01:29 -07:00
ptrace_32.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
ptrace_64.c
sparc64: Fill in rest of HAVE_REGS_AND_STACK_ACCESS_API
2017-04-23 17:15:51 -07:00
reboot.c
Disintegrate asm/system.h for Sparc
2012-03-28 18:30:03 +01:00
rtrap_32.S
sparc32: introduce support for run-time patching for all shared assembler code
2012-05-27 23:52:49 -07:00
rtrap_64.S
arch/sparc: Avoid DCTI Couples
2017-03-27 21:51:40 -07:00
sbus.c
sparc: kernel/sbus.c: fix memory leakage
2013-01-21 14:33:00 -08:00
setup_32.c
sparc: Remove redundant tests in boot_flags_init().
2017-05-03 08:28:48 -07:00
setup_64.c
sparc64: remove trailing white spaces
2017-06-12 15:44:01 -07:00
signal32.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
signal_32.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
signal_64.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
sigutil_32.c
sparc: Harden signal return frame checks.
2016-05-29 11:24:05 -07:00
sigutil_64.c
sparc: Harden signal return frame checks.
2016-05-29 11:24:05 -07:00
sigutil.h
…
smp_32.c
cpu/hotplug: Remove CPU_STARTING and CPU_DYING notifier
2016-09-06 18:30:19 +02:00
smp_64.c
sparc64: delete old wrap code
2017-06-06 13:45:29 -07:00
sparc_ksyms.c
sparc: move exports to definitions
2016-08-07 23:55:43 -04:00
spiterrs.S
arch/sparc: Avoid DCTI Couples
2017-03-27 21:51:40 -07:00
sstate.c
sparc: Fixed typo in sstate.c. Replaced panicing with panicking
2017-01-16 22:31:51 -05:00
stacktrace.c
sched/headers: Prepare for new header dependencies before moving code to <linux/sched/debug.h>
2017-03-02 08:42:34 +01:00
starfire.c
arch: sparc: kernel: starfire.c: Remove unused function
2015-03-01 21:33:58 -08:00
sun4d_irq.c
sparc/irq: Use helper irq_data_get_irq_handler_data()
2015-07-31 22:20:05 +02:00
sun4d_smp.c
sched/headers: Move task->mm handling methods to <linux/sched/mm.h>
2017-03-03 01:43:28 +01:00
sun4m_irq.c
sched/headers: Prepare for new header dependencies before moving code to <linux/sched/debug.h>
2017-03-02 08:42:34 +01:00
sun4m_smp.c
sched/headers: Move task->mm handling methods to <linux/sched/mm.h>
2017-03-03 01:43:28 +01:00
sun4v_ivec.S
…
sun4v_tlb_miss.S
arch/sparc: Avoid DCTI Couples
2017-03-27 21:51:40 -07:00
sys32.S
sparc: Hook up renameat2 syscall.
2014-07-21 22:27:56 -07:00
sys_sparc32.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
sys_sparc_32.c
sched/headers: Prepare for new header dependencies before moving code to <linux/sched/debug.h>
2017-03-02 08:42:34 +01:00
sys_sparc_64.c
sched/headers: Prepare for new header dependencies before moving code to <linux/sched/debug.h>
2017-03-02 08:42:34 +01:00
syscalls.S
sparc: Fix system call tracing register handling.
2016-01-21 16:06:00 -08:00
sysfs.c
sparc/sysfs: Replace racy task affinity logic
2017-04-15 12:20:54 +02:00
systbls_32.S
sparc: Update syscall tables.
2017-04-23 18:28:55 -07:00
systbls_64.S
sparc: Update syscall tables.
2017-04-23 18:28:55 -07:00
systbls.h
sparc64: fix sparse warnings in sys_sparc32.c
2014-05-18 19:01:31 -07:00
time_32.c
sparc/time: Set ->min_delta_ticks and ->max_delta_ticks
2017-04-14 13:11:11 -07:00
time_64.c
sparc64: access tick function from variable
2017-06-12 15:44:02 -07:00
trampoline_32.S
sparc: delete non-required instances of include <linux/init.h>
2014-01-28 23:38:23 -08:00
trampoline_64.S
sparc64: Fix register corruption in top-most kernel stack frame during boot.
2014-10-24 09:52:49 -07:00
traps_32.c
sched/headers: Move task->mm handling methods to <linux/sched/mm.h>
2017-03-03 01:43:28 +01:00
traps_64.c
sched/headers: Move task->mm handling methods to <linux/sched/mm.h>
2017-03-03 01:43:28 +01:00
tsb.S
sparc64: mm: fix copy_tsb to correctly copy huge page TSBs
2017-06-06 13:45:02 -07:00
ttable_32.S
sparc32: move trap table to a separate file
2012-05-19 23:27:25 -07:00
ttable_64.S
sparc64: delete old wrap code
2017-06-06 13:45:29 -07:00
una_asm_32.S
…
una_asm_64.S
…
unaligned_32.c
sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h>
2017-03-02 08:42:29 +01:00
unaligned_64.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
uprobes.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
urtt_fill.S
arch/sparc: Avoid DCTI Couples
2017-03-27 21:51:40 -07:00
utrap.S
sparc64: Fix bootup regressions on some Kconfig combinations.
2016-04-27 17:27:37 -04:00
vio.c
sparc: Machine description indices can vary
2017-06-06 13:45:03 -07:00
viohs.c
sched/headers: Prepare for new header dependencies before moving code to <linux/sched/clock.h>
2017-03-02 08:42:27 +01:00
visemul.c
scripts/spelling.txt: add "partiton" pattern and fix typo instances
2017-02-27 18:43:46 -08:00
vmlinux.lds.S
nmi_backtrace: generate one-line reports for idle cpus
2016-10-07 18:46:30 -07:00
windows.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
winfixup.S
arch/sparc: Avoid DCTI Couples
2017-03-27 21:51:40 -07:00
wof.S
sparc32: introduce support for run-time patching for all shared assembler code
2012-05-27 23:52:49 -07:00
wuf.S
sparc32: introduce support for run-time patching for all shared assembler code
2012-05-27 23:52:49 -07:00