[Mesa-dev] [PATCH v3 01/13] mesa/st/glsl_to_tgsi: Add method to collect some statistics
Gert Wollny
gw.fossdev at gmail.com
Sat Apr 28 19:30:01 UTC 2018
When mesa is compiled in debug mode then this adds the possibility
to print out some statistics about the translated shaders to a file.
The functionality is enabled by setting the environment variable
GLSL_TO_TGSI_PRINT_STATS
to the file name where the statistics should be collected. The file is
opened in append mode so that statistics from various runs will be
accumulated.
Signed-off-by: Gert Wollny <gw.fossdev at gmail.com>
---
src/mesa/state_tracker/st_glsl_to_tgsi.cpp | 55 ++++++++++++++++++++++++++++++
1 file changed, 55 insertions(+)
diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
index b321112cf8..1614367a01 100644
--- a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
@@ -66,6 +66,38 @@
#define MAX_GLSL_TEXTURE_OFFSET 4
+#ifndef NDEBUG
+#include <fstream>
+#include <ios>
+/* Prepare to make it possible to specify log file */
+static std::ofstream stats_log;
+
+/* Helper function to check whether we want to write some statistics
+ * of the shader conversion.
+ */
+static inline bool print_stats_enabled ()
+{
+ static int stats_enabled = 0;
+ if (!stats_enabled) {
+ const char *stats_filename = getenv("GLSL_TO_TGSI_PRINT_STATS");
+ if (stats_filename) {
+ bool write_header = std::ifstream(stats_filename).fail();
+ stats_log.open(stats_filename, std::ios_base::out | std::ios_base::app);
+ stats_enabled = stats_log.good() ? 1 : -1;
+ if (write_header)
+ stats_log << "arrays,temps,temps in arrays,total,instructions\n";
+ } else {
+ stats_enabled = -1;
+ }
+ }
+ return stats_enabled > 0;
+}
+#define PRINT_STATS(X) if (print_stats_enabled()) do { X; } while (false);
+#else
+#define PRINT_STATS(X)
+#endif
+
+
static unsigned is_precise(const ir_variable *ir)
{
if (!ir)
@@ -345,6 +377,8 @@ public:
st_dst_reg *l, st_src_reg *r,
st_src_reg *cond, bool cond_swap);
+ void print_stats();
+
void *mem_ctx;
};
@@ -5419,6 +5453,25 @@ glsl_to_tgsi_visitor::renumber_registers(void)
ralloc_free(first_writes);
}
+#ifndef NDEBUG
+void glsl_to_tgsi_visitor::print_stats()
+{
+ int narray_registers = 0;
+ for (unsigned i = 0; i < this->next_array; ++i)
+ narray_registers += this->array_sizes[i];
+
+ int ninstructions = 0;
+ foreach_in_list(glsl_to_tgsi_instruction, inst, &instructions) {
+ ++ninstructions;
+ }
+
+ stats_log << next_array << ", "
+ << next_temp << ", "
+ << narray_registers << ", "
+ << next_temp + narray_registers << ", "
+ << ninstructions << "\n";
+}
+#endif
/* ------------------------- TGSI conversion stuff -------------------------- */
/**
@@ -6928,6 +6981,8 @@ get_mesa_program_tgsi(struct gl_context *ctx,
return NULL;
}
+ PRINT_STATS(v->print_stats());
+
return prog;
}
--
2.16.1
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