RC6 residency should be in intervals of 1.28us, and the counter wraps.
Here is an example using awk to get the various RC6 and RC6+ residency
times in seconds, since boot.
cat /sys/kernel/debug/dri/0/i915_drpc_info | grep residency | awk -F':' -F' ' '{print $5 * 1.28 /
1000000}'
This is primarily for QA, but has other applications as well. An
upcoming patch to add interfaces should be more interesting to
application developers.
v2: move comment to the correct place
v3: display with %u instead of %d, for Ouping
CC: Ouping Zhang <ouping.zhang@intel.com>
Reviewed-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
Signed-off-by: Ben Widawsky <benjamin.widawsky@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
seq_printf(m, "Core Power Down: %s\n",
yesno(gt_core_status & GEN6_CORE_CPD_STATE_MASK));
+
+ /* Not exactly sure what this is */
+ seq_printf(m, "RC6 \"Locked to RPn\" residency since boot: %u\n",
+ I915_READ(GEN6_GT_GFX_RC6_LOCKED));
+ seq_printf(m, "RC6 residency since boot: %u\n",
+ I915_READ(GEN6_GT_GFX_RC6));
+ seq_printf(m, "RC6+ residency since boot: %u\n",
+ I915_READ(GEN6_GT_GFX_RC6p));
+ seq_printf(m, "RC6++ residency since boot: %u\n",
+ I915_READ(GEN6_GT_GFX_RC6pp));
+
return 0;
}
GEN6_PM_RP_DOWN_THRESHOLD | \
GEN6_PM_RP_DOWN_TIMEOUT)
+#define GEN6_GT_GFX_RC6_LOCKED 0x138104
+#define GEN6_GT_GFX_RC6 0x138108
+#define GEN6_GT_GFX_RC6p 0x13810C
+#define GEN6_GT_GFX_RC6pp 0x138110
+
#define GEN6_PCODE_MAILBOX 0x138124
#define GEN6_PCODE_READY (1<<31)
#define GEN6_READ_OC_PARAMS 0xc