Re: [Xen-devel] [PATCH] vpmu intel: Add dumping vpmu infos in 'q' keyhandler

[Dietmar Hahn <dietmar.hahn@xxxxxxxxxxxxxx>]

Am Donnerstag 14 MÃrz 2013, 10:36:25 schrieb Dietmar Hahn:
> 
> This patch extends the printout of the VPCU infos of the keyhandler 'q'.
> If vPMU is enabled is on the VCPU and active a line is printed like;
> (XEN)     vPMU running: fixed=0x2 general=0x1
> 
> This means from the fixed counters the counter 3 and the general
> counter 1 are enabled.
> As example this picture happens on linux-3.4.6 with watchdog and 'perf top'.
> This patch supports only Intel as I don't have Amd machines.
> Thanks.
> 
> Dietmar.

Ping?
 
> Signed-off-by: Dietmar Hahn <dietmar.hahn@xxxxxxxxxxxxxx>
> 
> diff -r a6b81234b189 xen/arch/x86/domain.c
> --- a/xen/arch/x86/domain.c   Mon Mar 11 16:13:42 2013 +0000
> +++ b/xen/arch/x86/domain.c   Thu Mar 14 10:25:49 2013 +0100
> @@ -2093,6 +2093,9 @@ void arch_dump_domain_info(struct domain
>  void arch_dump_vcpu_info(struct vcpu *v)
>  {
>      paging_dump_vcpu_info(v);
> +
> +    if ( is_hvm_vcpu(v) )
> +        vpmu_dump(v);
>  }
>  
>  void domain_cpuid(
> diff -r a6b81234b189 xen/arch/x86/hvm/vmx/vpmu_core2.c
> --- a/xen/arch/x86/hvm/vmx/vpmu_core2.c       Mon Mar 11 16:13:42 2013 +0000
> +++ b/xen/arch/x86/hvm/vmx/vpmu_core2.c       Thu Mar 14 10:25:49 2013 +0100
> @@ -611,6 +611,41 @@ static void core2_vpmu_do_cpuid(unsigned
>      }
>  }
>  
> +static void core2_vpmu_dump(struct vcpu *v)
> +{
> +    struct vpmu_struct *vpmu = vcpu_vpmu(v);
> +    int i, num, fixed, general;
> +    struct core2_vpmu_context *core2_vpmu_cxt = NULL;
> +
> +    if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) )
> +         return;
> +
> +    if ( !vpmu_is_set(vpmu, VPMU_RUNNING) )
> +    {
> +        if ( vpmu_set(vpmu, VPMU_CONTEXT_LOADED) )
> +            printk("    vPMU loaded\n");
> +        else
> +            printk("    vPMU allocated\n");
> +        return;
> +    }
> +
> +    core2_vpmu_cxt = vpmu->context;
> +    num = core2_get_pmc_count();
> +    general = 0;
> +    for ( i = 0; i < num; i++ )
> +    {
> +        if ( core2_vpmu_cxt->pmu_enable->arch_pmc_enable[i] )
> +            general |= 1 << i;
> +    }
> +    fixed = 0;
> +    for ( i = 0; i < 3; i++ )
> +    {
> +        if ( core2_vpmu_cxt->pmu_enable->fixed_ctr_enable[i] )
> +            fixed |= 1 << i;
> +    }
> +    printk("    vPMU running: fixed=0x%x general=0x%x\n", fixed, general);
> +}
> +
>  static int core2_vpmu_do_interrupt(struct cpu_user_regs *regs)
>  {
>      struct vcpu *v = current;
> @@ -724,7 +759,8 @@ struct arch_vpmu_ops core2_vpmu_ops = {
>      .do_cpuid = core2_vpmu_do_cpuid,
>      .arch_vpmu_destroy = core2_vpmu_destroy,
>      .arch_vpmu_save = core2_vpmu_save,
> -    .arch_vpmu_load = core2_vpmu_load
> +    .arch_vpmu_load = core2_vpmu_load,
> +    .arch_vpmu_dump = core2_vpmu_dump
>  };
>  
>  int vmx_vpmu_initialise(struct vcpu *v, unsigned int vpmu_flags)
> diff -r a6b81234b189 xen/arch/x86/hvm/vpmu.c
> --- a/xen/arch/x86/hvm/vpmu.c Mon Mar 11 16:13:42 2013 +0000
> +++ b/xen/arch/x86/hvm/vpmu.c Thu Mar 14 10:25:49 2013 +0100
> @@ -157,3 +157,12 @@ void vpmu_destroy(struct vcpu *v)
>          vpmu->arch_vpmu_ops->arch_vpmu_destroy(v);
>  }
>  
> +/* Dump some vpmu informations on console. Used in keyhandler 
> dump_domains(). */
> +void vpmu_dump(struct vcpu *v)
> +{
> +    struct vpmu_struct *vpmu = vcpu_vpmu(v);
> +
> +    if ( vpmu->arch_vpmu_ops && vpmu->arch_vpmu_ops->arch_vpmu_dump )
> +        vpmu->arch_vpmu_ops->arch_vpmu_dump(v);
> +}
> +
> diff -r a6b81234b189 xen/include/asm-x86/hvm/vpmu.h
> --- a/xen/include/asm-x86/hvm/vpmu.h  Mon Mar 11 16:13:42 2013 +0000
> +++ b/xen/include/asm-x86/hvm/vpmu.h  Thu Mar 14 10:25:49 2013 +0100
> @@ -54,6 +54,7 @@ struct arch_vpmu_ops {
>      void (*arch_vpmu_destroy)(struct vcpu *v);
>      void (*arch_vpmu_save)(struct vcpu *v);
>      void (*arch_vpmu_load)(struct vcpu *v);
> +    void (*arch_vpmu_dump)(struct vcpu *v);
>  };
>  
>  int vmx_vpmu_initialise(struct vcpu *, unsigned int flags);
> @@ -87,6 +88,7 @@ void vpmu_initialise(struct vcpu *v);
>  void vpmu_destroy(struct vcpu *v);
>  void vpmu_save(struct vcpu *v);
>  void vpmu_load(struct vcpu *v);
> +void vpmu_dump(struct vcpu *v);
>  
>  extern int acquire_pmu_ownership(int pmu_ownership);
>  extern void release_pmu_ownership(int pmu_ownership);
> 
> 
-- 
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