Fix gamma parameter passing

doc/chapters/perf-optimization.texi

@@ -495,7 +495,7 @@ application, specifying the requested number of devices:
 @cartouche
 @smallexample
 $ ./configure --enable-simgrid && make
-$ STARPU_SCHED=dmda STARPU_NCPU=12 STARPU_NCUDA=0 STARPU_NOPENCL=1 ./examples/matvecmult/matvecmult --cfg=network/TCP_gamma:1000000000
+$ STARPU_SCHED=dmda STARPU_NCPU=12 STARPU_NCUDA=0 STARPU_NOPENCL=1 ./examples/matvecmult/matvecmult
 TEST FAILED !!!
 @end smallexample
 @end cartouche
@@ -503,15 +503,12 @@ TEST FAILED !!!
 It is normal that the test fails: since the computation are not actually done
 (that is the whole point of simgrid), the result is wrong, of course.
 
-The @code{cfg=network/TCP_gamma} is needed for now to fix CPU/GPU transfer
-simulation.
-
 If the performance model is not calibrated enough, the following error
 message will be displayed
 
 @cartouche
 @smallexample
-$ STARPU_SCHED=dmda STARPU_NCPU=12 STARPU_NCUDA=0 STARPU_NOPENCL=1 ./examples/matvecmult/matvecmult --cfg=network/TCP_gamma:1000000000
+$ STARPU_SCHED=dmda STARPU_NCPU=12 STARPU_NCUDA=0 STARPU_NOPENCL=1 ./examples/matvecmult/matvecmult
 [0.000000] [xbt_cfg/INFO] type in variable = 2
 [0.000000] [surf_workstation/INFO] surf_workstation_model_init_ptask_L07
 [starpu][_starpu_load_history_based_model] Warning: model matvecmult is not calibrated, forcing calibration for this run. Use the STARPU_CALIBRATE environment variable to control this.
@@ -528,7 +525,7 @@ parameter @code{--cfg=contexts/stack_size}, for example:
 
 @cartouche
 @smallexample
-$ STARPU_NCPU=12 STARPU_NCUDA=2 STARPU_NOPENCL=0 ./example --cfg=contexts/stack_size:8192 --cfg=network/TCP_gamma:1000000000
+$ STARPU_NCPU=12 STARPU_NCUDA=2 STARPU_NOPENCL=0 ./example --cfg=contexts/stack_size:8192
 [0.000000] [xbt_cfg/INFO] type in variable = 2
 [0.000000] [surf_workstation/INFO] surf_workstation_model_init_ptask_L07
 TEST FAILED !!!

src/core/simgrid.c

@@ -69,9 +69,6 @@ int main(int argc, char **argv)
 	}
 
 	MSG_init(&argc, argv);
-	//MSG_config("network/TCP_gamma", "1000000000");
-	//MSG_config("network/latency_factor", "1");
-	//MSG_config("network/bandwidth_factor", "1");
 	MSG_config("workstation/model", "ptask_L07");
 
 	/* Create platform file */
@@ -116,6 +113,11 @@ int main(int argc, char **argv)
 "<?xml version='1.0'?>\n"
 " <!DOCTYPE platform SYSTEM 'http://simgrid.gforge.inria.fr/simgrid.dtd'>\n"
 " <platform version='3'>\n"
+" <config id='General'>\n"
+"   <prop id='network/TCP_gamma' value='1000000000'></prop>\n"
+"   <prop id='network/latency_factor' value='1'></prop>\n"
+"   <prop id='network/bandwidth_factor' value='1'></prop>\n"
+" </config>\n"
 " <AS  id='AS0'  routing='Full'>\n"
 "   <host id='MAIN' power='1'/>\n"
 		);