Re: [Qemu-devel] [PATCH 2/5] kvm-all: add kvm_ioctl, kvm_vm_ioctl, kvm_vcpu_ioctl tracepoints

[Paolo Bonzini <pbonzini@redhat.com>]

Il 22/03/2013 09:27, Kazuya Saito ha scritto:
> This patch adds tracepoints at ioctl to kvm. Tracing these ioctl is
> useful for clarification whether the cause of troubles is qemu or kvm.
> 
> Signed-off-by: Kazuya Saito <saito.kazuya@jp.fujitsu.com>
> ---
>  kvm-all.c    |    4 ++++
>  trace-events |    5 +++++
>  2 files changed, 9 insertions(+), 0 deletions(-)
> 
> diff --git a/kvm-all.c b/kvm-all.c
> index 4decfdc..da15623 100644
> --- a/kvm-all.c
> +++ b/kvm-all.c
> @@ -33,6 +33,7 @@
>  #include "exec/memory.h"
>  #include "exec/address-spaces.h"
>  #include "qemu/event_notifier.h"
> +#include "trace.h"
> 
>  /* This check must be after config-host.h is included */
>  #ifdef CONFIG_EVENTFD
> @@ -1636,6 +1637,7 @@ int kvm_ioctl(KVMState *s, int type, ...)
>      arg = va_arg(ap, void *);
>      va_end(ap);
> 
> +    trace_kvm_ioctl(type);
>      ret = ioctl(s->fd, type, arg);
>      if (ret == -1) {
>          ret = -errno;
> @@ -1653,6 +1655,7 @@ int kvm_vm_ioctl(KVMState *s, int type, ...)
>      arg = va_arg(ap, void *);
>      va_end(ap);
> 
> +    trace_kvm_vm_ioctl(type);
>      ret = ioctl(s->vmfd, type, arg);
>      if (ret == -1) {
>          ret = -errno;
> @@ -1670,6 +1673,7 @@ int kvm_vcpu_ioctl(CPUState *cpu, int type, ...)
>      arg = va_arg(ap, void *);
>      va_end(ap);
> 
> +    trace_kvm_vcpu_ioctl(type);
>      ret = ioctl(cpu->kvm_fd, type, arg);
>      if (ret == -1) {
>          ret = -errno;
> diff --git a/trace-events b/trace-events
> index 1e352a7..1af7060 100644
> --- a/trace-events
> +++ b/trace-events
> @@ -1096,3 +1096,8 @@ virtio_ccw_new_device(int cssid, int ssid, int schid, int devno, const char *dev
> 
>  # migration.c
>  migrate_set_state(int new_state) "new state %d"
> +
> +# kvm-all.c
> +kvm_ioctl(int type) "type %d"
> +kvm_vm_ioctl(int type) "type %d"
> +kvm_vcpu_ioctl(int type) "type %d"
> 

Please add arg as well and, for kvm_vcpu_ioctl, the CPU number too.

Thanks!

Paolo