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i965: Add an INTEL_DEBUG=submit option for printing batch statistics.

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When a batch is submitted, INTEL_DEBUG=bat prints a message indicating
which part of the code triggered the flush, and some statistics about
the batch/state buffer utilization.

It also decodes the batchbuffer in debug builds...which is so much
output that it drowns out the utilization messages, if that's all you
care about.

INTEL_DEBUG=submit now just does the utilization messages.
INTEL_DEBUG=bat continues to do both (as the message is a good indicator
that we're starting decode of a new batch).

v2: Rename from "flush" to "submit" (suggested by Chris) because we
    might want "flush" for PIPE_CONTROL debugging someday.

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Kenneth Graunke 2017-09-05 15:46:30 -07:00
parent 64d9bd149a
commit edfd8d42a9
4 changed files with 4 additions and 2 deletions
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1
docs/envvars.html
View file

@ -197,6 +197,7 @@ See the <a href="xlibdriver.html">Xlib software driver page</a> for details.
<li>spill_fs - force spilling of all registers in the scalar backend (useful to debug spilling code)</li>
<li>spill_vec4 - force spilling of all registers in the vec4 backend (useful to debug spilling code)</li>
<li>state - emit messages about state flag tracking</li>
<li>submit - emit batchbuffer usage statistics</li>
<li>sync - after sending each batch, emit a message and wait for that batch to finish rendering</li>
<li>tcs - dump shader assembly for tessellation control shaders</li>
<li>tes - dump shader assembly for tessellation evaluation shaders</li>

1
src/intel/common/gen_debug.c
View file

@ -57,6 +57,7 @@ static const struct debug_control debug_control[] = {
{ "vert", DEBUG_VERTS },
{ "dri", DEBUG_DRI },
{ "sf", DEBUG_SF },
{ "submit", DEBUG_SUBMIT },
{ "wm", DEBUG_WM },
{ "urb", DEBUG_URB },
{ "vs", DEBUG_VS },

2
src/intel/common/gen_debug.h
View file

@ -57,7 +57,7 @@ extern uint64_t INTEL_DEBUG;
#define DEBUG_VERTS (1ull << 13)
#define DEBUG_DRI (1ull << 14)
#define DEBUG_SF (1ull << 15)
/* Hole - feel free to reuse (1ull << 16) */
#define DEBUG_SUBMIT (1ull << 16)
#define DEBUG_WM (1ull << 17)
#define DEBUG_URB (1ull << 18)
#define DEBUG_VS (1ull << 19)

2
src/mesa/drivers/dri/i965/intel_batchbuffer.c
View file

@ -731,7 +731,7 @@ _intel_batchbuffer_flush_fence(struct brw_context *brw,
brw_bo_reference(brw->throttle_batch[0]);
}
if (unlikely(INTEL_DEBUG & DEBUG_BATCH)) {
if (unlikely(INTEL_DEBUG & (DEBUG_BATCH | DEBUG_SUBMIT))) {
int bytes_for_commands = 4 * USED_BATCH(brw->batch);
int bytes_for_state = brw->batch.bo->size - brw->batch.state_batch_offset;
int total_bytes = bytes_for_commands + bytes_for_state;