Add png curve generation to starpu_perfmodel_plot

ChangeLog

@@ -37,6 +37,11 @@ Small features:
   * Allow scheduling policies to be loaded with STARPU_SCHED&co but
     not to be in the list of predefined policies
 
+StarPU 1.4.8
+==============================================
+Small features:
+  * Add png curve generation to starpu_perfmodel_plot
+
 StarPU 1.4.7
 ==============================================
 Small changes:

doc/doxygen/chapters/starpu_faq/check_list_performance.doxy

@@ -429,7 +429,7 @@ execution time on CPUs was about 25ms, with a 0.2ms standard deviation, over
 8 samples. It is a good idea to check this before doing actual performance
 measurements.
 
-A graph can be drawn by using the tool <c>starpu_perfmodel_plot</c>:
+A graph (both in postscript and png format) can be drawn by using the tool <c>starpu_perfmodel_plot</c>:
 
 \verbatim
 $ starpu_perfmodel_plot -s starpu_slu_lu_model_getrf

doc/doxygen/chapters/starpu_performances/offline_performance_tools.doxy

@@ -615,12 +615,14 @@ $ tools/starpu_perfmodel_display -x -s non_linear_memset_regression_based
 
 The tool <c>starpu_perfmodel_plot</c> can be used to draw performance
 models. It writes a <c>.gp</c> file in the current directory, to be
-run with the tool <c>gnuplot</c>, which shows the corresponding curve.
+run with the tool <c>gnuplot</c>, which generates the corresponding
+curve both in postscript and png format.
 
 \verbatim
 $ tools/starpu_perfmodel_plot -s non_linear_memset_regression_based
 $ gnuplot starpu_non_linear_memset_regression_based.gp
-$ gv starpu_non_linear_memset_regression_based.png
+$ gv starpu_non_linear_memset_regression_based.eps
+$ geeqie starpu_non_linear_memset_regression_based.png
 \endverbatim
 
 \image html starpu_non_linear_memset_regression_based.png
@@ -697,7 +699,7 @@ proper unit in the graph:
 \verbatim
 $ tools/starpu_perfmodel_plot -e -s non_linear_memset_regression_based_energy
 $ gnuplot starpu_non_linear_memset_regression_based_energy.gp
-$ gv starpu_non_linear_memset_regression_based_energy.png
+$ gv starpu_non_linear_memset_regression_based_energy.eps
 \endverbatim
 
 \image html starpu_non_linear_memset_regression_based_energy.png
@@ -708,7 +710,7 @@ The <c>-f</c> option can also be used to display the performance in terms of GFl
 \verbatim
 $ tools/starpu_perfmodel_plot -f -e -s non_linear_memset_regression_based_energy
 $ gnuplot starpu_gflops_non_linear_memset_regression_based_energy.gp
-$ gv starpu_gflops_non_linear_memset_regression_based_energy.png
+$ gv starpu_gflops_non_linear_memset_regression_based_energy.eps
 \endverbatim
 
 \image html starpu_gflops_non_linear_memset_regression_based_energy.png

tools/starpu_perfmodel_plot.c

@@ -567,6 +567,9 @@ static void display_selected_models(FILE *gnuplot_file, struct starpu_perfmodel
 		display_all_perf_models(gnuplot_file, model, &first, options);
 	display_history_based_perf_models(gnuplot_file, model, energy_model, &first, options);
 
+	fprintf(gnuplot_file, "\nset term png\n");
+	fprintf(gnuplot_file, "set output \"starpu_%s%s.png\"\n", options->energy_symbol?"power_":options->gflops?"gflops_":"", options->symbol);
+	fprintf(gnuplot_file, "replot\n");
 	free(symbol);
 }