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drm/v3d: Add more tracepoints for V3D GPU rendering. 

The core scheduler tells us when the job is pushed to the scheduler's
queue, and I had the job_run functions saying when they actually queue
the job to the hardware.  By adding tracepoints for the very top of
the ioctls and the IRQs signaling job completion, "perf record -a -e
v3d:.\* -e gpu_scheduler:.\* <job>; perf script" gets you a pretty
decent timeline.

Signed-off-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20181201005759.28093-5-eric@anholt.net
Reviewed-by: Dave Emett <david.emett@broadcom.com>
This commit is contained in:
Eric Anholt 2018-11-30 16:57:58 -08:00
parent db176f6ba1
commit 55a9b74846
3 changed files with 121 additions and 3 deletions
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4
drivers/gpu/drm/v3d/v3d_gem.c
View File

@ -521,6 +521,8 @@ v3d_submit_cl_ioctl(struct drm_device *dev, void *data,
struct drm_syncobj *sync_out;
int ret = 0;
trace_v3d_submit_cl_ioctl(&v3d->drm, args->rcl_start, args->rcl_end);
if (args->pad != 0) {
DRM_INFO("pad must be zero: %d\n", args->pad);
return -EINVAL;
@ -648,6 +650,8 @@ v3d_submit_tfu_ioctl(struct drm_device *dev, void *data,
int ret = 0;
int bo_count;
trace_v3d_submit_tfu_ioctl(&v3d->drm, args->iia);
job = kcalloc(1, sizeof(*job), GFP_KERNEL);
if (!job)
return -ENOMEM;

19
drivers/gpu/drm/v3d/v3d_irq.c
View File

@ -15,6 +15,7 @@
#include "v3d_drv.h"
#include "v3d_regs.h"
#include "v3d_trace.h"
#define V3D_CORE_IRQS ((u32)(V3D_INT_OUTOMEM | \
V3D_INT_FLDONE | \
@ -88,12 +89,20 @@ v3d_irq(int irq, void *arg)
}
if (intsts & V3D_INT_FLDONE) {
dma_fence_signal(v3d->bin_job->bin.done_fence);
struct v3d_fence *fence =
to_v3d_fence(v3d->bin_job->bin.done_fence);
trace_v3d_bcl_irq(&v3d->drm, fence->seqno);
dma_fence_signal(&fence->base);
status = IRQ_HANDLED;
}
if (intsts & V3D_INT_FRDONE) {
dma_fence_signal(v3d->render_job->render.done_fence);
struct v3d_fence *fence =
to_v3d_fence(v3d->render_job->render.done_fence);
trace_v3d_rcl_irq(&v3d->drm, fence->seqno);
dma_fence_signal(&fence->base);
status = IRQ_HANDLED;
}
@ -119,7 +128,11 @@ v3d_hub_irq(int irq, void *arg)
V3D_WRITE(V3D_HUB_INT_CLR, intsts);
if (intsts & V3D_HUB_INT_TFUC) {
dma_fence_signal(v3d->tfu_job->done_fence);
struct v3d_fence *fence =
to_v3d_fence(v3d->tfu_job->done_fence);
trace_v3d_tfu_irq(&v3d->drm, fence->seqno);
dma_fence_signal(&fence->base);
status = IRQ_HANDLED;
}

101
drivers/gpu/drm/v3d/v3d_trace.h
View File

@ -12,6 +12,28 @@
#define TRACE_SYSTEM v3d
#define TRACE_INCLUDE_FILE v3d_trace
TRACE_EVENT(v3d_submit_cl_ioctl,
TP_PROTO(struct drm_device *dev, u32 ct1qba, u32 ct1qea),
TP_ARGS(dev, ct1qba, ct1qea),
TP_STRUCT__entry(
__field(u32, dev)
__field(u32, ct1qba)
__field(u32, ct1qea)
),
TP_fast_assign(
__entry->dev = dev->primary->index;
__entry->ct1qba = ct1qba;
__entry->ct1qea = ct1qea;
),
TP_printk("dev=%u, RCL 0x%08x..0x%08x",
__entry->dev,
__entry->ct1qba,
__entry->ct1qea)
);
TRACE_EVENT(v3d_submit_cl,
TP_PROTO(struct drm_device *dev, bool is_render,
uint64_t seqno,
@ -42,6 +64,85 @@ TRACE_EVENT(v3d_submit_cl,
__entry->ctnqea)
);
TRACE_EVENT(v3d_bcl_irq,
TP_PROTO(struct drm_device *dev,
uint64_t seqno),
TP_ARGS(dev, seqno),
TP_STRUCT__entry(
__field(u32, dev)
__field(u64, seqno)
),
TP_fast_assign(
__entry->dev = dev->primary->index;
__entry->seqno = seqno;
),
TP_printk("dev=%u, seqno=%llu",
__entry->dev,
__entry->seqno)
);
TRACE_EVENT(v3d_rcl_irq,
TP_PROTO(struct drm_device *dev,
uint64_t seqno),
TP_ARGS(dev, seqno),
TP_STRUCT__entry(
__field(u32, dev)
__field(u64, seqno)
),
TP_fast_assign(
__entry->dev = dev->primary->index;
__entry->seqno = seqno;
),
TP_printk("dev=%u, seqno=%llu",
__entry->dev,
__entry->seqno)
);
TRACE_EVENT(v3d_tfu_irq,
TP_PROTO(struct drm_device *dev,
uint64_t seqno),
TP_ARGS(dev, seqno),
TP_STRUCT__entry(
__field(u32, dev)
__field(u64, seqno)
),
TP_fast_assign(
__entry->dev = dev->primary->index;
__entry->seqno = seqno;
),
TP_printk("dev=%u, seqno=%llu",
__entry->dev,
__entry->seqno)
);
TRACE_EVENT(v3d_submit_tfu_ioctl,
TP_PROTO(struct drm_device *dev, u32 iia),
TP_ARGS(dev, iia),
TP_STRUCT__entry(
__field(u32, dev)
__field(u32, iia)
),
TP_fast_assign(
__entry->dev = dev->primary->index;
__entry->iia = iia;
),
TP_printk("dev=%u, IIA 0x%08x",
__entry->dev,
__entry->iia)
);
TRACE_EVENT(v3d_submit_tfu,
TP_PROTO(struct drm_device *dev,
uint64_t seqno),