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636a415bcc
linux/arch/parisc/kernel
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Helge Deller 636a415bcc parisc: Reduce irq overhead when run in qemu 
When run under QEMU, calling mfctl(16) creates some overhead because the
qemu timer has to be scaled and moved into the register. This patch
reduces the number of calls to mfctl(16) by moving the calls out of the
loops.

Additionally, increase the minimal time interval to 8000 cycles instead
of 500 to compensate possible QEMU delays when delivering interrupts.

Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org # 4.14+
2018-03-02 10:05:07 +01:00
..
.gitignore
asm-offsets.c parisc: Drop per_cpu uaccess related exception_data struct 2017-05-10 17:46:13 +02:00
audit.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
binfmt_elf32.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cache.c parisc: Fix ordering of cache and TLB flushes 2018-03-02 10:03:28 +01:00
compat_audit.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
drivers.c parisc: Show unhashed hardware inventory 2018-01-02 21:00:57 +01:00
entry.S parisc: Fix alignment of pa_tlb_lock in assembly on 32-bit SMP kernel 2018-01-02 22:21:54 +01:00
firmware.c parisc: Add wrapper for pdc_instr() firmware function 2017-09-22 19:46:44 +02:00
ftrace.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
hardware.c parisc: add serial ports of C8000/1GHz machine to hardware database 2014-07-13 15:51:58 +02:00
head.S parisc: Check if secondary CPUs want own PDC calls 2018-03-02 10:04:46 +01:00
hpmc.S parisc: Align os_hpmc_size on word boundary 2017-12-17 21:06:25 +01:00
inventory.c parisc: Add Page Deallocation Table (PDT) support 2017-05-12 09:14:15 +02:00
irq.c parisc: Increase thread and stack size to 32kb 2017-07-31 08:41:26 +02:00
Makefile parisc: Add CPU topology support 2017-11-17 15:27:22 +01:00
module.c mm, vmalloc: use __GFP_HIGHMEM implicitly 2017-05-08 17:15:13 -07:00
pa7300lc.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pacache.S parisc: Fix ordering of cache and TLB flushes 2018-03-02 10:03:28 +01:00
parisc_ksyms.c parisc: Export __cmpxchg_u64 unconditionally 2017-10-19 08:48:45 +02:00
pci-dma.c A couple of dma-mapping updates: 2017-11-14 16:54:12 -08:00
pci.c parisc: Use generic pci_mmap_resource_range() 2017-04-20 08:47:47 -05:00
pdc_chassis.c parisc: single_open() leaks 2013-05-05 00:10:41 -04:00
pdc_cons.c treewide: Switch DEFINE_TIMER callbacks to struct timer_list * 2017-11-21 15:57:05 -08:00
pdt.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
perf_asm.S
perf_images.h
perf.c parisc: Static initialization of spinlocks in perf and unwind code 2017-08-22 16:34:33 +02:00
process.c parisc: qemu idle sleep support 2018-01-06 12:28:04 +01:00
processor.c parisc: Add CPU topology support 2017-11-17 15:27:22 +01:00
ptrace.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
real2.S parisc: Make existing core files reuseable for bootloader 2017-08-22 16:34:35 +02:00
setup.c parisc: Add CPU topology support 2017-11-17 15:27:22 +01:00
signal32.c parisc: switch to {get,put}_compat_sigset() 2017-09-19 17:56:02 -04:00
signal32.h parisc: switch to {get,put}_compat_sigset() 2017-09-19 17:56:02 -04:00
signal.c Merge branch 'misc.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2017-11-17 11:54:55 -08:00
smp.c parisc: Check if secondary CPUs want own PDC calls 2018-03-02 10:04:46 +01:00
stacktrace.c
sys_parisc32.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sys_parisc.c mm: larger stack guard gap, between vmas 2017-06-19 21:50:20 +08:00
syscall_table.S parisc: use compat_sys_keyctl() 2017-07-02 22:10:47 +02:00
syscall.S parisc: Fix validity check of pointer size argument in new CAS implementation 2017-11-17 15:27:13 +01:00
time.c parisc: Reduce irq overhead when run in qemu 2018-03-02 10:05:07 +01:00
topology.c parisc: Add CPU topology support 2017-11-17 15:27:22 +01:00
traps.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
unaligned.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/debug.h> 2017-03-02 08:42:34 +01:00
unwind.c parisc: remove duplicate includes 2017-12-17 21:06:25 +01:00
vmlinux.lds.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00