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st/mesa: Only pause queries if there are any active queries to pause.

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Previously, ReadPixels, PBO upload/download, and clears would call
cso_save_state with CSO_PAUSE_QUERIES, causing cso_context to call
pipe->set_active_query_state() twice for each operation.  This can
potentially cause driver work to enable/disable statistics counters.

But often, there are no queries happening which need to be paused.
By keeping a simple tally of active queries, we can skip this work.

Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
This commit is contained in:
Kenneth Graunke
2019-09-09 15:36:16 -07:00
parent 2c1983f757
commit 73e4f974b8
5 changed files with 17 additions and 4 deletions
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src/mesa/state_tracker/st_cb_clear.c
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@@ -267,7 +267,7 @@ clear_with_quad(struct gl_context *ctx, unsigned clear_buffers)
CSO_BIT_STREAM_OUTPUTS |
CSO_BIT_VERTEX_ELEMENTS |
CSO_BIT_AUX_VERTEX_BUFFER_SLOT |
CSO_BIT_PAUSE_QUERIES |
(st->active_queries ? CSO_BIT_PAUSE_QUERIES : 0) |
CSO_BITS_ALL_SHADERS));
/* blend state: RGBA masking */