This patch causes libdrm, when NOUVEAU_DUMP=1 is set, to write the
pushbuffer to stdout instead of submitting it to the card.
renouveau-parse can then be used to parse it and obtain a readable
trace.
This is very useful for debugging and optimizing the Gallium driver.
---
nouveau/nouveau_private.h | 1 +
nouveau/nouveau_pushbuf.c | 13 +++++++++++--
2 files changed, 12 insertions(+), 2 deletions(-)
diff --git a/nouveau/nouveau_private.h b/nouveau/nouveau_private.h
index 0e526a1..bed117a 100644
--- a/nouveau/nouveau_private.h
+++ b/nouveau/nouveau_private.h
@@ -40,6 +40,7 @@
#define CALPB_BUFSZ 16384
struct nouveau_pushbuf_priv {
int no_aper_update;
+ int use_dump;
int use_cal;
uint32_t cal_suffix0;
uint32_t cal_suffix1;
diff --git a/nouveau/nouveau_pushbuf.c b/nouveau/nouveau_pushbuf.c
index b6af216..4cb8985 100644
--- a/nouveau/nouveau_pushbuf.c
+++ b/nouveau/nouveau_pushbuf.c
@@ -148,7 +148,10 @@ nouveau_pushbuf_init(struct nouveau_channel *chan)
struct nouveau_pushbuf_priv *nvpb = &nvchan->pb;
int ret;
- nouveau_pushbuf_init_call(chan);
+ if(getenv("NOUVEAU_DUMP"))
+ nvpb->use_dump = 1;
+ if(!nvpb->use_dump)
+ nouveau_pushbuf_init_call(chan);
ret = nouveau_pushbuf_space(chan, 0);
if (ret) {
@@ -190,7 +193,13 @@ nouveau_pushbuf_flush(struct nouveau_channel *chan,
unsigned min)
if (chan->cur == nvpb->pushbuf)
return 0;
- if (nvpb->use_cal) {
+ if (nvpb->use_dump) {
+ uint32_t* p;
+ printf("# begin %i dwords %i buffers %i relocs\n", chan->cur -
nvpb->pushbuf, nvpb->nr_buffers, nvpb->nr_relocs);
+ for(p = nvpb->pushbuf; p != chan->cur; ++p)
+ printf("%08x\n", *p);
+ printf("# end\n");
+ } else if (nvpb->use_cal) {
struct drm_nouveau_gem_pushbuf_call req;
*(chan->cur++) = nvpb->cal_suffix0;
--
1.6.6.1.476.g01ddb
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