1 files changed, 125 insertions, 0 deletions
diff --git a/stress.c b/stress.c
new file mode 100644
index 0000000..0b7e999
--- /dev/null
+++ b/stress.c
@@ -0,0 +1,125 @@
+#include "stress.h"
+
+void usage(void)
+{
+    printf("Usage: stress [-t n] [-m n]\n");
+    printf("\t-t n\tRun n processes parallel\n");
+    printf("\t-m n\tTest n MiB of Memory\n");
+    printf("\n");
+    printf("\t\tCan be combined\n");
+    exit(0);
+}
+
+void testMemory(unsigned long long size)
+{
+    char *mem=malloc(size*sizeof(char));
+    unsigned long long i;
+    unsigned char run=0;
+
+    while(1==1)
+    {
+        for(i=0; i<size; i++)
+        {
+            mem[i]=(mem[i]+i+run)%256;
+        }
+        run++;
+    }
+}
+
+void testCPU(void)
+{
+    long double f=0;
+    long double res=0;
+    while(1==1)
+    {
+        for(f=0; f<LDBL_MAX; f+=LDBL_EPSILON)
+        {
+            res=sqrtl(f);
+        }
+    }
+}
+
+int main(int argc, char **argv)
+{
+    const char *optargs = "t:m:h";
+    char optc;
+    unsigned long long convtemp;
+
+    unsigned char errflags=0;
+    unsigned char optflags=0;
+
+    unsigned char threads = 1;
+    unsigned long long memory = 1048576LL;
+
+    int i, pid, wstatus;
+
+    while((optc=getopt(argc,argv,optargs))!=-1)
+    {
+        switch(optc)
+        {
+        case 't':
+            if((convtemp = strtoll(optarg, NULL, 10))==0)
+            {
+                errflags|=THREADS;
+                perror("Error with -t: ");
+            }
+            else
+            {
+                optflags|=THREADS;
+                threads=convtemp;
+            }
+            break;
+        case 'm':
+            if((convtemp = strtoll(optarg, NULL, 10))==0)
+            {
+                errflags|=MEMSIZE;
+                perror("Error with -m: ");
+            }
+            else
+            {
+                optflags|=MEMSIZE;
+                memory=convtemp*1024*1024;
+            }
+            break;
+        case 'h':
+        case '?':
+        default:
+            usage();
+        }
+    }
+
+    if(errflags>0)
+    {
+        usage();
+    }
+    if(optflags & THREADS)
+    {
+        printf("Threads: %d\n", threads);
+    }
+    if(optflags & MEMSIZE)
+    {
+        printf("Memsize: %llu\n", memory);
+    }
+
+    for(i=0; i<threads; i++)
+    {
+        switch(pid=fork())
+        {
+        case -1:
+            perror("fork()");
+            break;
+        case 0:
+            if(optflags&MEMSIZE)
+              testMemory(memory/threads);
+            else
+              testCPU();
+            break;
+        }
+    }
+    for(i=0; i<threads; i++)
+    {
+        wait(&wstatus);
+    }
+
+    return 0;
+}