From 1c5d22f76dc721f3acb7a3dadc657a221e487fb7 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Tue, 25 Aug 2009 11:15:50 +0100 Subject: drm/i915: Add tracepoints By adding tracepoint equivalents for WATCH_BUF/EXEC we are able to monitor the lifetimes of objects, requests and significant events. These events can then be probed using the tracing frameworks, such as systemtap and, in particular, perf. For example to record the stack trace for every GPU stall during a run, use $ perf record -e i915:i915_gem_request_wait_begin -c 1 -g And $ perf report to view the results. [Updated to fix compilation issues caused.] Cc: Arjan van de Ven Cc: Ben Gamari Signed-off-by: Chris Wilson --- drivers/gpu/drm/i915/i915_irq.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) (limited to 'drivers/gpu/drm/i915/i915_irq.c') diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index 13e664ddb611..4dfeec7cdd42 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -31,6 +31,7 @@ #include "drm.h" #include "i915_drm.h" #include "i915_drv.h" +#include "i915_trace.h" #include "intel_drv.h" #define MAX_NOPID ((u32)~0) @@ -279,7 +280,9 @@ irqreturn_t igdng_irq_handler(struct drm_device *dev) } if (gt_iir & GT_USER_INTERRUPT) { - dev_priv->mm.irq_gem_seqno = i915_get_gem_seqno(dev); + u32 seqno = i915_get_gem_seqno(dev); + dev_priv->mm.irq_gem_seqno = seqno; + trace_i915_gem_request_complete(dev, seqno); DRM_WAKEUP(&dev_priv->irq_queue); } @@ -622,7 +625,9 @@ irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS) } if (iir & I915_USER_INTERRUPT) { - dev_priv->mm.irq_gem_seqno = i915_get_gem_seqno(dev); + u32 seqno = i915_get_gem_seqno(dev); + dev_priv->mm.irq_gem_seqno = seqno; + trace_i915_gem_request_complete(dev, seqno); DRM_WAKEUP(&dev_priv->irq_queue); dev_priv->hangcheck_count = 0; mod_timer(&dev_priv->hangcheck_timer, jiffies + DRM_I915_HANGCHECK_PERIOD); -- cgit v1.2.3-55-g7522