Changeset b002261

Timestamp:

Mar 1, 2018, 9:28:48 AM (6 years ago)

Author:

Thierry Delisle <tdelisle@…>

Branches:

ADT, aaron-thesis, arm-eh, ast-experimental, cleanup-dtors, deferred_resn, demangler, enum, forall-pointer-decay, jacob/cs343-translation, jenkins-sandbox, master, new-ast, new-ast-unique-expr, new-env, no_list, persistent-indexer, pthread-emulation, qualifiedEnum, resolv-new, with_gc

Children:

dcbb03b

Parents:

807d8c3

Message:

Busy program now supports variable number of threads

File:

• tools/busy.c (modified) (2 diffs)

tools/busy.c

@@ -1 +1 @@
 #include <stdbool.h>
+#include <stdio.h>
 #include <stdlib.h>
 #include <pthread.h>
@@ -31 +32 @@
 }
 
-int main() {
-    while(true) {
-            pthread_t t[15];
-            for(int i = 0; i < 15; i++) {
-                    pthread_create( &t[i], NULL, CallingMalloc, NULL );
-            }
+int main(int argc, const char * const argv[]) {
+        char * endptr;
+        int nThreads = 15;
+        switch(argc) {
+        case 1:
+                break;
+        case 2:
+                nThreads = strtol(argv[1], &endptr, 10);
+                if( *endptr != 0 || nThreads <= 0 ) {
+                        fprintf(stderr, "Invalid number of threads %s\n", argv[1]);
+                        return 1;
+                }
+                break;
+        default:
+                fprintf(stderr, "Usage: %s [no of threads]\n", argv[0]);
+                return 1;
+        }
+        printf("Running %d threads\n", nThreads);
+        while(true) {
+                pthread_t t[nThreads];
+                for(int i = 0; i < nThreads; i++) {
+                        pthread_create( &t[i], NULL, CallingMalloc, NULL );
+                }
 
-            for(int i = 0; i < 15; i++) {
-                    pthread_join( t[i], NULL );
-            }
-    }
+                for(int i = 0; i < nThreads; i++) {
+                        pthread_join( t[i], NULL );
+                }
+        }
+        return 0;
 }