by
NIC's controller chip performance and the bus speed.
My benchmark also shows a interesting data: the throughput of a pass-
through device is higher than bare-mental sometime.(I use NetPIPE)
Thanks,
Tomoki Sekiyama
Thanks a lot.
Yang Minqiang
-Original Message-
From: Tomoki
(CPUState *env)
+{
+int r, slave = env-cpu_index == 0 ? 2 : env-cpu_index == 1 ? 3 : -1;
`slave' is the offlined CPU ID assigned, and `env-cpu_index' is
the virtual CPU ID. You need to modify here and recompile qemu-kvm
(or just offline cpu 2 and 3 for a 2vcpus guest ;) ).
Thanks,
Tomoki
(CPUState *env)
+{
+int r, slave = env-cpu_index == 0 ? 2 : env-cpu_index == 1 ? 3 : -1;
`slave' is the offlined CPU ID assigned, and `env-cpu_index' is
the virtual CPU ID. You need to modify here and recompile qemu-kvm
(or just offline cpu 2 and 3 for a 2vcpus guest ;) ).
Thanks,
Tomoki
Hi Paul,
Thank you for your comments, and sorry for my late reply.
On 2012/09/21 2:34, Paul E. McKenney wrote:
On Thu, Sep 06, 2012 at 08:27:40PM +0900, Tomoki Sekiyama wrote:
Initialize rcu related variables to avoid warnings about RCU usage while
slave CPUs is running specified functions
Hi Jan,
On 2012/09/07 17:26, Jan Kiszka wrote:
On 2012-09-06 13:27, Tomoki Sekiyama wrote:
This RFC patch series provides facility to dedicate CPUs to KVM guests
and enable the guests to handle interrupts from passed-through PCI devices
directly (without VM exit and relay by the host
/cpu3/online
- Launch qemu-kvm with -no-kvm-pit option.
The offlined CPU is booted as a slave CPU and guest is runs on that CPU.
* To-do
- Enable slave CPUs to handle access fault
- Support AMD SVM
- Support non-Linux guests
---
Tomoki Sekiyama (21):
x86: request TLB flush to slave
for the guest is resumed on an online CPU.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa...@redhat.com
Cc: Thomas Gleixner t...@linutronix.de
Cc: Ingo Molnar mi...@redhat.com
Cc: H. Peter Anvin h...@zytor.com
---
arch/x86/include
Add trace event kvm_set_direct_interrupt to trace enabling/disabling
direct interrupt delivery on slave CPUs. At the event, the guest rip and
whether the feature is enabled or not is logged.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo
CPU with IRQ remapper of IOMMU.
This is intended to be used to routing interrupts directly to KVM guest
which is running on slave CPUs which do not cause VM EXIT by external
interrupts.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti
, and
guest must use the same vector as host.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa...@redhat.com
Cc: Thomas Gleixner t...@linutronix.de
Cc: Ingo Molnar mi...@redhat.com
Cc: H. Peter Anvin h...@zytor.com
---
arch/x86
.
This patch adds kvm_arch_vcpu_prevent_run(), which causes VM exit right
after VM enter. The NMI handler uses this to ensure the execution of the
guest is cancelled after NMI.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa
to be routed either online CPUs or slave CPUs.
In this patch, if online CPUs are contained in specified affinity settings,
the affinity settings will be only applied to online CPUs. If every
specified CPU is slave, IRQ will be routed to slave CPUs.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama
Avoid exiting from a guest on slave CPU even if HLT instruction is
executed. Since the slave CPU is dedicated to a vCPU, exit on HLT is
not required, and avoiding VM exit will improve the guest's performance.
This is a partial revert of
10166744b80a (KVM: VMX: remove yield_on_hlt)
Cc:
Initialize rcu related variables to avoid warnings about RCU usage while
slave CPUs is running specified functions. Also notify RCU subsystem before
the slave CPU is entered into idle state.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo
for EXIT_REASON_PREEMPTION_TIMER,
which just goes back to VM execution soon.
These are currently intended only to be used with avoid entering the
guest on a slave CPU when vmx_prevent_run(vcpu, 1) is called.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa
after every virtual IRQ is handled.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa...@redhat.com
Cc: Thomas Gleixner t...@linutronix.de
Cc: Ingo Molnar mi...@redhat.com
Cc: H. Peter Anvin h...@zytor.com
---
arch/x86/kvm/vmx.c
. Then, NMI handler will check the
requests and handles the requests.
This implementation has an issue in scalability, and is just for PoC.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa...@redhat.com
Cc: Thomas Gleixner t
this, if the guest issues EOI when there are no
in-service interrupts in the virtual APIC, physical EOI is issued.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa...@redhat.com
Cc: Thomas Gleixner t...@linutronix.de
Cc: Ingo Molnar mi
on slave CPUs.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa...@redhat.com
Cc: Thomas Gleixner t...@linutronix.de
Cc: Ingo Molnar mi...@redhat.com
Cc: H. Peter Anvin h...@zytor.com
---
arch/x86/include/asm/kvm_host.h |1
Split memory hotplug function from cpu_up() as cpu_memory_up(), which will
be used for assigning memory area to off-lined cpus at following patch
in this series.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa...@redhat.com
Cc
to manage whether CPU is slave.
In addition, `cpu_online_or_slave_mask' is also provided for convenence of
APIC handling, etc.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa...@redhat.com
Cc: Thomas Gleixner t...@linutronix.de
are called with CPU_SLAVE_UP when a slave CPU
becomes active. When the slave CPU is stopped, callbacks are called with
CPU_SLAVE_DYING on slave CPUs, and with CPU_SLAVE_DEAD on online CPUs.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo
, kvm_arch_vcpu_put_migrate is used to avoid using IPI to
clear loaded vmcs from the old CPU. Instead, this immediately clears
vmcs.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa...@redhat.com
Cc: Thomas Gleixner t...@linutronix.de
Cc
-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa...@redhat.com
Cc: Thomas Gleixner t...@linutronix.de
Cc: Ingo Molnar mi...@redhat.com
Cc: H. Peter Anvin h...@zytor.com
---
arch/x86/include/asm/kvm_host.h |2 +
arch/x86/kvm/vmx.c
-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa...@redhat.com
Cc: Thomas Gleixner t...@linutronix.de
Cc: Ingo Molnar mi...@redhat.com
Cc: H. Peter Anvin h...@zytor.com
---
arch/x86/include/asm/kvm_host.h |5
arch/x86/kvm/mmu.c
If the slave CPU receives an interrupt in running a guest, current
implementation must once go back to onilne CPUs to handle the interupt.
This behavior will be replaced by later patch, which introduces direct
interrupt handling mechanism by the guest.
Signed-off-by: Tomoki Sekiyama
Enable virtualization when slave CPUs are activated, and disable when
the CPUs are dying using slave CPU notifier call chain.
In x86, TSC kHz must also be initialized by tsc_khz_changed when the
new slave CPUs are activated.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi
to move applications
around flexibly among nodes shared by many users.
Thanks,
--
Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Linux Technology Center
Hitachi, Ltd., Yokohama Research Laboratory
--
To unsubscribe from this list: send the line unsubscribe kvm in
the body of a message to majord
_IO(KVMIO, 0xaf)
#define KVM_DEV_ASSIGN_ENABLE_IOMMU(1 0)
Thanks,
--
Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Linux Technology Center
Hitachi, Ltd., Yokohama Research Laboratory
--
To unsubscribe from this list: send the line unsubscribe kvm in
the body of a message
,
--
Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Linux Technology Center
Hitachi, Ltd., Yokohama Research Laboratory
--
To unsubscribe from this list: send the line unsubscribe kvm in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo
On 2012/06/29 2:02, Avi Kivity wrote:
On 06/28/2012 09:07 AM, Tomoki Sekiyama wrote:
Add path to migrate execution of vcpu_enter_guest to a slave CPU when
vcpu-arch.slave_cpu is set.
After moving to the slave CPU, it goes back to the online CPU when the
guest is exited by reasons that cannot
On 2012/06/29 1:48, Avi Kivity wrote:
On 06/28/2012 09:08 AM, Tomoki Sekiyama wrote:
Since NMI can not be disabled around VM enter, there is a race between
receiving NMI to kick a guest and entering the guests on slave CPUs.If the
NMI is received just before entering VM, after the NMI handler
On 2012/06/29 1:38, Avi Kivity wrote:
On 06/28/2012 09:08 AM, Tomoki Sekiyama wrote:
For slave CPUs, it is inapropriate to request TLB flush using IPI.
because the IPI may be sent to a KVM guest when the slave CPU is running
the guest with direct interrupt routing.
Instead, it registers
);
+if (r 0)
+perror(kvm_set_slave_cpu);
+return r;
+}
+
static int _kvm_arch_init_vcpu(CPUState *env)
{
kvm_arch_reset_vcpu(env);
kvm_enable_tpr_access_reporting(env);
+kvm_set_slave_cpu(env);
+
return kvm_update_ioport_access(env);
}
---
Tomoki Sekiyama (18
Split memory hotplug function from cpu_up() as cpu_memory_up(), which will
be used for assigning memory area to off-lined cpus at following patch
in this series.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa...@redhat.com
Cc
' is provided to manage whether CPU is slave.
In addition, `cpu_online_or_slave_mask' is also provided for convenence of
APIC handling, etc.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa...@redhat.com
Cc: Thomas Gleixner t
Enable virtualization when slave CPUs are activated, and disable when
the CPUs are dying using slave CPU notifier call chain.
In x86, TSC kHz must also be initialized by tsc_khz_changed when the
new slave CPUs are activated.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi
, kvm_arch_vcpu_put_migrate is used to avoid using IPI to
clear loaded vmcs from the old CPU. Instead, this immediately clears
vmcs.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa...@redhat.com
Cc: Thomas Gleixner t...@linutronix.de
Cc
-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa...@redhat.com
Cc: Thomas Gleixner t...@linutronix.de
Cc: Ingo Molnar mi...@redhat.com
Cc: H. Peter Anvin h...@zytor.com
---
arch/x86/include/asm/kvm_host.h |2 +
arch/x86/kvm/vmx.c
If the slave CPU receives an interrupt in running a guest, current
implementation must once go back to onilne CPUs to handle the interupt.
This behavior will be replaced by later patch, which introduces direct
interrupt handling mechanism by the guest.
Signed-off-by: Tomoki Sekiyama
Replace local_irq_disable/enable with local_irq_save/restore in the path
where is executed on slave CPUs. This is required because irqs are disabled
while the guest is running on the slave CPUs.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc
Avoid exiting from a guest on slave CPU even if HLT instruction is
executed. Since the slave CPU is dedicated to a vCPU, exit on HLT is
not required, and avoiding VM exit will improve the guest's performance.
This is a partial revert of
10166744b80a (KVM: VMX: remove yield_on_hlt)
Cc:
CPU with IRQ remapper of IOMMU.
This is intended to be used to routing interrupts directly to KVM guest
which is running on slave CPUs which do not cause VM EXIT by external
interrupts.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti
to be routed either online CPUs or slave CPUs.
In this patch, if online CPUs are contained in specified affinity settings,
the affinity settings will be only applied to online CPUs. If every
specified CPU is slave, IRQ will be routed to slave CPUs.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama
for EXIT_REASON_PREEMPTION_TIMER,
which just goes back to VM execution soon.
These are currently intended only to be used with avoid entering the
guest on a slave CPU when vmx_prevent_run(vcpu, 1) is called.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa
-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa...@redhat.com
Cc: Thomas Gleixner t...@linutronix.de
Cc: Ingo Molnar mi...@redhat.com
Cc: H. Peter Anvin h...@zytor.com
---
arch/x86/include/asm/kvm_host.h |5
arch/x86/kvm/mmu.c
for the guest is resumed on an online CPU.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa...@redhat.com
Cc: Thomas Gleixner t...@linutronix.de
Cc: Ingo Molnar mi...@redhat.com
Cc: H. Peter Anvin h...@zytor.com
---
arch/x86/include
are called with CPU_SLAVE_UP when a slave CPU
becomes active. When the slave CPU is stopped, callbacks are called with
CPU_SLAVE_DYING on slave CPUs, and with CPU_SLAVE_DEAD on online CPUs.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo
this, if the guest issues EOI when there are no
in-service interrupts in the virtual APIC, physical EOI is issued.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa...@redhat.com
Cc: Thomas Gleixner t...@linutronix.de
Cc: Ingo Molnar mi
. Then, NMI handler will check the
requests and handles the requests.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa...@redhat.com
Cc: Thomas Gleixner t...@linutronix.de
Cc: Ingo Molnar mi...@redhat.com
Cc: H. Peter Anvin h
on slave CPUs.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa...@redhat.com
Cc: Thomas Gleixner t...@linutronix.de
Cc: Ingo Molnar mi...@redhat.com
Cc: H. Peter Anvin h...@zytor.com
---
arch/x86/kvm/vmx.c |4
arch
.
This patch adds kvm_arch_vcpu_prevent_run(), which causes VM exit right
after VM enter. The NMI handler uses this to ensure the execution of the
guest is cancelled after NMI.
Signed-off-by: Tomoki Sekiyama tomoki.sekiyama...@hitachi.com
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti mtosa
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