On Tue, Sep 1, 2020 at 8:41 AM Rob Clark <robdclark@xxxxxxxxx> 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.
That is a good solution,
Reviewed-by: Kristian H. Kristensen <hoegsberg@xxxxxxxxxx>
> 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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