redonkable/alistair23-linux
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alistair23-linux/include/asm-x86_64
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Arjan van de Ven e07e23e1fd [PATCH] non lazy "sleazy" fpu implementation 
Right now the kernel on x86-64 has a 100% lazy fpu behavior: after *every*
context switch a trap is taken for the first FPU use to restore the FPU
context lazily.  This is of course great for applications that have very
sporadic or no FPU use (since then you avoid doing the expensive
save/restore all the time).  However for very frequent FPU users...  you
take an extra trap every context switch.

The patch below adds a simple heuristic to this code: After 5 consecutive
context switches of FPU use, the lazy behavior is disabled and the context
gets restored every context switch.  If the app indeed uses the FPU, the
trap is avoided.  (the chance of the 6th time slice using FPU after the
previous 5 having done so are quite high obviously).

After 256 switches, this is reset and lazy behavior is returned (until
there are 5 consecutive ones again).  The reason for this is to give apps
that do longer bursts of FPU use still the lazy behavior back after some
time.

[akpm@osdl.org: place new task_struct field next to jit_keyring to save space]
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
2006-09-26 10:52:36 +02:00
..
8253pit.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
a.out.h [PATCH] x86_64: TASK_SIZE fixes for compatibility mode processes 2005-06-21 18:46:12 -07:00
acpi.h Revert "[PATCH] x86_64: Only do the clustered systems have unsynchronized TSC assumption on IBM systems" 2006-02-27 20:41:56 -08:00
agp.h [PATCH] AGP fix for Xen VMM 2005-06-07 12:35:43 -07:00
alternative-asm.i [PATCH] Support patchable lock prefix for pure assembly files 2006-09-26 10:52:28 +02:00
alternative.h [PATCH] x86_64: Remove alternative_smp 2006-08-30 16:05:15 -07:00
apic.h [PATCH] Don't access the APIC in safe_smp_processor_id when it is not mapped yet 2006-09-26 10:52:34 +02:00
apicdef.h x86_64: Remove stale lapic definition from apicdef.h 2006-04-01 22:50:03 -05:00
atomic.h [PATCH] x86_64: x86_64 version of the smp alternative patch. 2006-06-26 10:48:14 -07:00
auxvec.h [PATCH] auxiliary vector cleanups 2005-09-07 16:57:21 -07:00
bitops.h [PATCH] x86_64: x86_64 version of the smp alternative patch. 2006-06-26 10:48:14 -07:00
boot.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
bootsetup.h [PATCH] Increase number of e820 entries hard limit from 32 to 128 2005-05-01 08:58:51 -07:00
bug.h [PATCH] x86-64: reduce x86-64 bug frame by 4 bytes 2005-09-12 10:50:58 -07:00
bugs.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
byteorder.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
cache.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
cacheflush.h [PATCH] x86/x86_64: mark rodata section read-only: x86-64 support 2006-01-06 08:33:36 -08:00
calgary.h [PATCH] Calgary IOMMU: rearrange 'struct iommu_table' members 2006-09-26 10:52:31 +02:00
calling.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
checksum.h [NET]: Fix ipl=>ihl typo in ip_fast_csum 2005-08-29 16:02:48 -07:00
compat.h [PATCH] amd64: task_pt_regs() 2006-01-12 09:08:51 -08:00
cpu.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
cpufeature.h [PATCH] x86_64: i386/x86-64 Add nmi watchdog support for new Intel CPUs 2006-06-26 10:48:22 -07:00
cputime.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
current.h kbuild: alpha,x86_64 use generic asm-offsets.h support 2005-09-09 21:28:48 +02:00
debugreg.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
delay.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
desc.h [PATCH] x86_64: Align and pad x86_64 GDT on page boundary 2006-01-11 19:04:53 -08:00
div64.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
dma-mapping.h [PATCH] x86_64: Calgary IOMMU - move valid_dma_direction into the callers 2006-06-26 10:48:18 -07:00
dma.h [PATCH] x86_64: Remove long obsolete CVS 2006-06-26 10:48:16 -07:00
dmi.h [PATCH] x86_64: Implement early DMI scanning 2006-03-25 09:10:55 -08:00
dwarf2.h [PATCH] x86: Detect CFI support in the assembler at runtime 2006-09-26 10:52:30 +02:00
e820.h [PATCH] Convert x86-64 to early param 2006-09-26 10:52:32 +02:00
edac.h [PATCH] EDAC: core EDAC support code 2006-01-18 19:20:31 -08:00
elf.h [PATCH] Fix 'make headers_check' on x86_64 2006-09-16 12:54:32 -07:00
emergency-restart.h [PATCH] x86_64: Implemenent machine_emergency_restart 2005-07-26 14:35:42 -07:00
errno.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
fcntl.h [PATCH] Clean up struct flock definitions 2005-09-07 16:57:38 -07:00
fixmap.h [PATCH] Remove all ifdefs for local/io apic 2006-09-26 10:52:29 +02:00
floppy.h [PATCH] irq-flags: x86_64: Use the new IRQF_ constants 2006-07-02 13:58:49 -07:00
fpu32.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
futex.h [PATCH] lightweight robust futexes updates 2006-03-27 08:44:49 -08:00
genapic.h [PATCH] remove int_delivery_dest 2006-09-26 10:52:31 +02:00
hardirq.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
hpet.h [PATCH] x86_64: Rename oem_force_hpet_timer to apic_is_clustered_box 2006-06-26 10:48:19 -07:00
hw_irq.h [PATCH] genirq: add ->retrigger() irq op to consolidate hw_irq_resend() 2006-06-29 10:26:23 -07:00
i387.h [PATCH] non lazy "sleazy" fpu implementation 2006-09-26 10:52:36 +02:00
ia32.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
ia32_unistd.h [PATCH] x86_64: Remove most of ia32_unistd.h 2006-06-26 10:48:15 -07:00
ide.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
idle.h [PATCH] x86_64: Add idle notifiers 2006-01-11 19:04:55 -08:00
intel_arch_perfmon.h [PATCH] x86: i386/x86-64 Add nmi watchdog support for new Intel CPUs 2006-09-26 10:52:27 +02:00
io.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
io_apic.h [PATCH] Remove all ifdefs for local/io apic 2006-09-26 10:52:29 +02:00
ioctl.h [PATCH] Generic ioctl.h 2006-01-10 08:01:34 -08:00
ioctls.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ipcbuf.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ipi.h [PATCH] x86_64: Remove useless KDB vector 2006-01-11 19:05:00 -08:00
irq.h [PATCH] Remove all ifdefs for local/io apic 2006-09-26 10:52:29 +02:00
irqflags.h [PATCH] lockdep: irqtrace cleanup of include/asm-x86_64/irqflags.h 2006-07-03 15:27:03 -07:00
k8.h [PATCH] x86_64: Clean and enhance up K8 northbridge access code 2006-06-26 10:48:15 -07:00
Kbuild [HEADERS] One line per header in Kbuild files to reduce conflicts 2006-09-19 12:43:58 +01:00
kdebug.h [PATCH] lockdep: beautify x86_64 stacktraces 2006-07-03 15:27:02 -07:00
kexec.h [PATCH] Compilation of kexec/kdump broken 2006-02-03 08:32:09 -08:00
kmap_types.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
kprobes.h [PATCH] IA64: kprobe invalidate icache of jump buffer 2006-07-31 13:28:38 -07:00
ldt.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
linkage.h [PATCH] Add proper alignment to ENTRY 2006-09-26 10:52:29 +02:00
local.h [PATCH] x86_64: Fix race in cpu_local_* on preemptible kernels 2006-06-26 10:48:21 -07:00
mach_apic.h [PATCH] remove int_delivery_dest 2006-09-26 10:52:31 +02:00
mc146818rtc.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
mce.h [PATCH] x86_64: mce_amd support for family 0x10 processors 2006-06-26 10:48:20 -07:00
mman.h [PATCH] add asm-generic/mman.h 2006-02-15 15:32:22 -08:00
mmsegment.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
mmu.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
mmu_context.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
mmx.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
mmzone.h [PATCH] Delete unused definitions of kvaddr_to_nid 2006-06-23 07:42:52 -07:00
module.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
mpspec.h [PATCH] Replace mp bus array with bitmap for bus not pci 2006-09-26 10:52:30 +02:00
msgbuf.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
msi.h [PATCH] PCI: cleanup unused variable about msi driver 2006-06-21 12:00:00 -07:00
msr.h [PATCH] Add macros for rdtscp 2006-09-26 10:52:28 +02:00
mtrr.h Move inclusion of <linux/compat.h> out of user scope in asm-x86_64/mtrr.h 2006-05-21 22:51:13 +01:00
mutex.h [PATCH] Don't use lock section for mutexes and semaphores 2006-09-26 10:52:32 +02:00
namei.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
nmi.h [PATCH] Fix up panic messages for different NMI panics 2006-09-26 10:52:27 +02:00
node.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
numa.h [PATCH] Unify pxm_to_node() and node_to_pxm() 2006-06-23 07:42:48 -07:00
page.h [PATCH] x86_64: Enlarge debug stack for nested kprobes 2006-07-28 19:28:00 -07:00
param.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
parport.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
pci-direct.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
pci.h [PATCH] x86_64: Calgary IOMMU - Calgary specific bits 2006-06-26 10:48:19 -07:00
pda.h [PATCH] x86_64: Reorder one field of the PDA to reduce padding 2006-03-25 09:10:56 -08:00
percpu.h [PATCH] Auto size the per cpu area. 2006-09-26 10:52:35 +02:00
pgalloc.h [PATCH] x86_64: actively synchronize vmalloc area when registering certain callbacks 2006-03-25 09:10:53 -08:00
pgtable.h [PATCH] Convert x86-64 to early param 2006-09-26 10:52:32 +02:00
poll.h [PATCH] POLLRDHUP/EPOLLRDHUP handling for half-closed devices notifications 2006-03-25 08:22:56 -08:00
posix_types.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
prctl.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
processor.h [PATCH] x86_64: Save original IST values for checking stack addresses 2006-08-30 16:05:16 -07:00
proto.h [PATCH] x86: Remove unneeded externs in acpi/boot.c 2006-09-26 10:52:33 +02:00
ptrace.h [PATCH] xen: x86: Rename usermode macro 2005-06-23 09:45:14 -07:00
resource.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
rtc.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
rwlock.h [PATCH] Clean up spin/rwlocks 2006-09-26 10:52:32 +02:00
scatterlist.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
seccomp.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sections.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
segment.h [PATCH] Add the vgetcpu vsyscall 2006-09-26 10:52:28 +02:00
semaphore.h [PATCH] Don't use lock section for mutexes and semaphores 2006-09-26 10:52:32 +02:00
sembuf.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
serial.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
setup.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
shmbuf.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
shmparam.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sigcontext.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sigcontext32.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
siginfo.h [PATCH] consolidate SIGEV_PAD_SIZE 2005-05-01 08:59:08 -07:00
signal.h [PATCH] Add TIF_RESTORE_SIGMASK 2006-09-26 10:52:26 +02:00
smp.h [PATCH] Remove obsolete PIC mode 2006-09-26 10:52:30 +02:00
socket.h [AF_UNIX]: Datagram getpeersec 2006-06-29 16:58:06 -07:00
sockios.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sparsemem.h [PATCH] add x86-64 specific support for sparsemem 2005-06-23 09:45:07 -07:00
spinlock.h [PATCH] Clean up spin/rwlocks 2006-09-26 10:52:32 +02:00
spinlock_types.h [PATCH] spinlock consolidation 2005-09-10 10:06:21 -07:00
stacktrace.h [PATCH] Merge stacktrace and show_trace 2006-09-26 10:52:34 +02:00
stat.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
statfs.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
string.h [PATCH] x86_64: Use __always_inline for __inline_memcpy 2006-06-26 10:48:14 -07:00
suspend.h [PATCH] x86_64: eliminate set_debug() 2006-03-25 09:10:52 -08:00
swiotlb.h [PATCH] x86_64: Fix swiotlb=force 2006-07-29 20:59:55 -07:00
system.h [PATCH] remove set_wmb - arch removal 2006-07-14 21:56:14 -07:00
tce.h [PATCH] Calgary IOMMU: consolidate per bus data structures 2006-09-26 10:52:31 +02:00
termbits.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
termios.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
thread_info.h [PATCH] x86-64 TIF flags for debug regs and io bitmap in ctxsw 2006-09-26 10:52:28 +02:00
timex.h [PATCH] x86_64: fix sync before RDTSC on Intel cpus 2006-04-11 06:38:57 -07:00
tlb.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
tlbflush.h [PATCH] Clean up and minor fixes to TLB flush 2006-09-26 10:52:29 +02:00
topology.h [PATCH] sched: mc/smt power savings sched policy 2006-06-27 17:32:45 -07:00
types.h [PATCH] sab: consolidate kmem_bufctl_t 2005-09-05 00:05:48 -07:00
uaccess.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
ucontext.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
unaligned.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
unistd.h [PATCH] Add ppoll/pselect syscalls 2006-09-26 10:52:27 +02:00
unwind.h [PATCH] x86: Make backtracer fallback logic more bullet-proof 2006-08-30 16:05:15 -07:00
user.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
user32.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
vga.h [PATCH] vgacon: make VGA_MAP_MEM take size, remove extra use 2006-06-22 15:05:58 -07:00
vsyscall.h [PATCH] Add the vgetcpu vsyscall 2006-09-26 10:52:28 +02:00
vsyscall32.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
xor.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00