changes to the documentation

src/network-workloads/README_synthetic.txt

@@ -14,11 +14,17 @@ SAMPLING:
       an end time. Over this end time, dragonfly model will collect compute
       node and router samples after every "t" simulated nanoseconds. The
       sampling output files can be specified in the config file using
-      cn_sample_file and rt_sample_file arguments. An example utility that
-      reads the binary files and translates it into text can be found at
+      cn_sample_file and rt_sample_file arguments. By default the compute node
+      and router outputs will be sent to dragonfly-cn-sampling-%d.bin and
+      dragonfly-router-sampling-%d.bin. Corresponding metadata files for also
+      generated that gives information on the file format, dragonfly
+      configuration being used, router radix etc. 
+      
+      An example utility that reads the binary files and translates it into
+      text format can be found at
       src/networks/model-net/read-dragonfly-sample.c (Note that the router
-      radix aka RADIX needs to be tuned with the dragonfly configuration 
-      in the utility to enable continguous array allocation).
+      radix aka RADIX needs to be tuned with the dragonfly configuration in the
+      utility to enable continguous array allocation).
 
 HOW TO RUN:
 

src/networks/model-net/dragonfly.c

@@ -1986,8 +1986,8 @@ void dragonfly_rsample_fin(router_state * s,
         sprintf(meta_fname, "dragonfly-router-sampling.meta");
 
         FILE * fp = fopen(meta_fname, "w");
-        fprintf(fp, "\n Router sample format: router_id \t busy time for each of the %d links \t"
-                "link traffic for each of the %d links \t sample end time ",
+        fprintf(fp, "Router sample struct format: router_id (tw_lpid) \t busy time for each of the %d links (double) \t"
+                "link traffic for each of the %d links (int64_t) \t sample end time (double)",
                 p->radix, p->radix);
         fclose(fp);
     }
@@ -2140,8 +2140,9 @@ void dragonfly_sample_fin(terminal_state * s,
         sprintf(meta_fname, "dragonfly-cn-sampling.meta");
 
         FILE * fp = fopen(meta_fname, "w");
-        fprintf(fp, "\n Compute node sample format: terminal_id \t finished chunks \t"
-                "data size per sample \t finished hops \t time to finish chunks \t busy time \t sample end time");
+        fprintf(fp, "Compute node sample format: terminal_id (tw_lpid) \t finished chunks (long) \t"
+                "data size per sample (long) \t finished hops (double) \t time to finish chunks (double) \t "
+                "busy time (double)\t sample end time(double)");
         fclose(fp);
     }
     char rt_fn[MAX_NAME_LENGTH];