Re: [Xen-devel] [PATCH 03/14] xen: sched: fi position of TRC_SCHED_DOM_{ADD, REM}

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Fri, Feb 05, 2016 at 07:33:50PM +0100, Dario Faggioli wrote:

On the title you have 'fi', but I think you meant 'fix'.

> so that they actually live in the functions that
> do the scheduling related domain initialization and
> destruction.
> 
> Signed-off-by: Dario Faggioli <dario.faggioli@xxxxxxxxxx>

.. would it make sense to have an overall high-level
'DOM_ADD' and 'DOM_REM' trace ?

Especially as it is useful for figuring out how long
an domain destruction takes time (based on the initial
trace to say this TRC_SCHED_REM)?

> ---
> Cc: George Dunlap <george.dunlap@xxxxxxxxxxxxx>
> ---
>  xen/common/domain.c   |    1 -
>  xen/common/schedule.c |    4 ++--
>  2 files changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/xen/common/domain.c b/xen/common/domain.c
> index 425767c..ddc7484 100644
> --- a/xen/common/domain.c
> +++ b/xen/common/domain.c
> @@ -867,7 +867,6 @@ void domain_destroy(struct domain *d)
>      cpupool_rm_domain(d);
>  
>      /* Delete from task list and task hashtable. */
> -    TRACE_1D(TRC_SCHED_DOM_REM, d->domain_id);
>      spin_lock(&domlist_update_lock);
>      pd = &domain_list;
>      while ( *pd != d ) 
> diff --git a/xen/common/schedule.c b/xen/common/schedule.c
> index c87922f..27695e3 100644
> --- a/xen/common/schedule.c
> +++ b/xen/common/schedule.c
> @@ -241,8 +241,6 @@ int sched_init_vcpu(struct vcpu *v, unsigned int 
> processor)
>      if ( v->sched_priv == NULL )
>          return 1;
>  
> -    TRACE_2D(TRC_SCHED_DOM_ADD, v->domain->domain_id, v->vcpu_id);
> -
>      /* Idle VCPUs are scheduled immediately, so don't put them in runqueue. 
> */
>      if ( is_idle_domain(d) )
>      {
> @@ -369,12 +367,14 @@ void sched_destroy_vcpu(struct vcpu *v)
>  int sched_init_domain(struct domain *d)
>  {
>      SCHED_STAT_CRANK(dom_init);
> +    TRACE_1D(TRC_SCHED_DOM_ADD, d->domain_id);
>      return SCHED_OP(DOM2OP(d), init_domain, d);
>  }
>  
>  void sched_destroy_domain(struct domain *d)
>  {
>      SCHED_STAT_CRANK(dom_destroy);
> +    TRACE_1D(TRC_SCHED_DOM_REM, d->domain_id);
>      SCHED_OP(DOM2OP(d), destroy_domain, d);
>  }
>  
> 
> 
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