From cce66a283e36e7479774de47ae9f33f7db2b8fcf Mon Sep 17 00:00:00 2001 From: Ben Widawsky Date: Tue, 27 Mar 2012 18:59:38 -0700 Subject: drm/i915: add rc6 residency times to debugfs 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 Reviewed-by: Eugeni Dodonov Signed-off-by: Ben Widawsky Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_debugfs.c | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'drivers/gpu/drm/i915/i915_debugfs.c') diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index 967fb928c577..97c963082d4d 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -1171,6 +1171,17 @@ static int gen6_drpc_info(struct seq_file *m) 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; } -- cgit v1.2.2