Re: [Freedreno] [PATCH 2/3] drm/msm: Convert shrinker msgs to tracepoints

[Jordan Crouse]

On Tue, Sep 01, 2020 at 08:41:55AM -0700, Rob Clark wrote:
> From: Rob Clark <robdclark@xxxxxxxxxxxx>
> 
> This reduces the spam in dmesg when we start hitting the shrinker, and
> replaces it with something we can put on a timeline while profiling or
> debugging system issues.

Reviewed-by: Jordan Crouse <jcrouse@xxxxxxxxxxxxxx>

> Signed-off-by: Rob Clark <robdclark@xxxxxxxxxxxx>
> ---
>  drivers/gpu/drm/msm/msm_gem_shrinker.c |  5 +++--
>  drivers/gpu/drm/msm/msm_gpu_trace.h    | 26 ++++++++++++++++++++++++++
>  2 files changed, 29 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/msm_gem_shrinker.c b/drivers/gpu/drm/msm/msm_gem_shrinker.c
> index 722d61668a97..482576d7a39a 100644
> --- a/drivers/gpu/drm/msm/msm_gem_shrinker.c
> +++ b/drivers/gpu/drm/msm/msm_gem_shrinker.c
> @@ -6,6 +6,7 @@
>  
>  #include "msm_drv.h"
>  #include "msm_gem.h"
> +#include "msm_gpu_trace.h"
>  
>  static bool msm_gem_shrinker_lock(struct drm_device *dev, bool *unlock)
>  {
> @@ -87,7 +88,7 @@ msm_gem_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc)
>  		mutex_unlock(&dev->struct_mutex);
>  
>  	if (freed > 0)
> -		pr_info_ratelimited("Purging %lu bytes\n", freed << PAGE_SHIFT);
> +		trace_msm_gem_purge(freed << PAGE_SHIFT);
>  
>  	return freed;
>  }
> @@ -123,7 +124,7 @@ msm_gem_shrinker_vmap(struct notifier_block *nb, unsigned long event, void *ptr)
>  	*(unsigned long *)ptr += unmapped;
>  
>  	if (unmapped > 0)
> -		pr_info_ratelimited("Purging %u vmaps\n", unmapped);
> +		trace_msm_gem_purge_vmaps(unmapped);
>  
>  	return NOTIFY_DONE;
>  }
> diff --git a/drivers/gpu/drm/msm/msm_gpu_trace.h b/drivers/gpu/drm/msm/msm_gpu_trace.h
> index 07572ab179fa..1079fe551279 100644
> --- a/drivers/gpu/drm/msm/msm_gpu_trace.h
> +++ b/drivers/gpu/drm/msm/msm_gpu_trace.h
> @@ -114,6 +114,32 @@ TRACE_EVENT(msm_gmu_freq_change,
>  		TP_printk("freq=%u, perf_index=%u", __entry->freq, __entry->perf_index)
>  );
>  
> +
> +TRACE_EVENT(msm_gem_purge,
> +		TP_PROTO(u32 bytes),
> +		TP_ARGS(bytes),
> +		TP_STRUCT__entry(
> +			__field(u32, bytes)
> +			),
> +		TP_fast_assign(
> +			__entry->bytes = bytes;
> +			),
> +		TP_printk("Purging %u bytes", __entry->bytes)
> +);
> +
> +
> +TRACE_EVENT(msm_gem_purge_vmaps,
> +		TP_PROTO(u32 unmapped),
> +		TP_ARGS(unmapped),
> +		TP_STRUCT__entry(
> +			__field(u32, unmapped)
> +			),
> +		TP_fast_assign(
> +			__entry->unmapped = unmapped;
> +			),
> +		TP_printk("Purging %u vmaps", __entry->unmapped)
> +);
> +
>  #endif
>  
>  #undef TRACE_INCLUDE_PATH
> -- 
> 2.26.2
> 
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