[PATCH v2 5/6] drm/i915/gvt: Add helper for tuning MMIO hash table
changbin.du at intel.com
changbin.du at intel.com
Tue Jun 6 02:48:07 UTC 2017
From: Changbin Du <changbin.du at intel.com>
We count all the tracked virtual MMIO registers, which can help us to
tune the MMIO hash table.
v2: Move num_tracked_mmio into gvt structure.
Signed-off-by: Changbin Du <changbin.du at intel.com>
---
drivers/gpu/drm/i915/gvt/gvt.h | 1 +
drivers/gpu/drm/i915/gvt/handlers.c | 4 ++++
2 files changed, 5 insertions(+)
diff --git a/drivers/gpu/drm/i915/gvt/gvt.h b/drivers/gpu/drm/i915/gvt/gvt.h
index 9653d73..3acf7fe 100644
--- a/drivers/gpu/drm/i915/gvt/gvt.h
+++ b/drivers/gpu/drm/i915/gvt/gvt.h
@@ -215,6 +215,7 @@ struct intel_gvt_mmio {
#define F_UNALIGN (1 << 6)
DECLARE_HASHTABLE(mmio_info_table, INTEL_GVT_MMIO_HASH_BITS);
+ unsigned int num_tracked_mmio;
};
struct intel_gvt_firmware {
diff --git a/drivers/gpu/drm/i915/gvt/handlers.c b/drivers/gpu/drm/i915/gvt/handlers.c
index 1fe1c30..a4f6712 100644
--- a/drivers/gpu/drm/i915/gvt/handlers.c
+++ b/drivers/gpu/drm/i915/gvt/handlers.c
@@ -124,6 +124,7 @@ static int new_mmio_info(struct intel_gvt *gvt,
gvt->mmio.mmio_attribute[info->offset / 4] = flags;
INIT_HLIST_NODE(&info->node);
hash_add(gvt->mmio.mmio_info_table, &info->node, info->offset);
+ gvt->mmio.num_tracked_mmio++;
}
return 0;
}
@@ -2934,6 +2935,9 @@ int intel_gvt_setup_mmio_info(struct intel_gvt *gvt)
if (ret)
goto err;
}
+
+ gvt_dbg_mmio("traced %u virtual mmio registers\n",
+ gvt->mmio.num_tracked_mmio);
return 0;
err:
intel_gvt_clean_mmio_info(gvt);
--
2.7.4
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