SparrowOSTS_121127.ISO

SparrowOS/Demo/MultiCore/MPAdd.CPP

@@ -0,0 +1,85 @@
+I64 mp_n;
+
+I64 MPSum(I64 my_mp_cnt)
+{ //We could use the formula n*(n+1)/2
+  I64 lo=mp_n*Gs->num/my_mp_cnt,
+     hi=mp_n*(Gs->num+1)/my_mp_cnt,
+     result=0,i;
+  for (i=lo;i<hi;i++)
+    result+=i;
+  return result;
+}
+
+I64 Sum(I64 n,I64 my_mp_cnt)
+{
+  CMPCmd *tempm[MP_MAX_PROCESSORS];
+  I64 result=0,i;
+  mp_n=n+1;
+  for (i=1;i<my_mp_cnt;i++)
+    tempm[i]=MPJob(&MPSum,my_mp_cnt,i,0);
+  result=MPSum(my_mp_cnt);
+  for (i=1;i<my_mp_cnt;i++)
+    result+=MPJobResult(tempm[i]);
+  return result;
+}
+
+
+#define SAMPLE_SIZE 100
+
+F64 Test(I64 n,I64 my_mp_cnt)
+{
+  I64 i,val=0;
+  F64 start,end;
+  start=tNP;
+  for (i=0;i<SAMPLE_SIZE;i++)
+    val+=Sum(n,my_mp_cnt);
+  end=tNP;
+  "Val:%,d\n",val/SAMPLE_SIZE;
+  "$$FG,RED$$N:%12,d Time:%10.8f$$FG$$\n",n,(end-start)/SAMPLE_SIZE;
+  return end-start;
+}
+
+#define NUM_TESTS	7
+#define MAX_PERCENT	200
+
+U0 MPAdd()
+{
+  I64 i,n,
+    h=Fs->win_pixel_width,
+    v=Fs->win_pixel_height;
+  F64 t1,t2,results[NUM_TESTS];
+  CDC *dc=DCAlias;
+
+  for (i=0,n=10;i<NUM_TESTS;i++,n*=10) {
+    t1=Test(n,1);
+    t2=Test(n,mp_cnt);
+    results[i]=t2*100.0/t1;
+    "$$FG,GREEN$$%8.4f%%$$FG$$\n\n",results[i];
+  }
+  PressAKey;
+
+  DocClear;
+
+  dc->color=BLUE;
+  for (i=0;i<MAX_PERCENT;i+=MAX_PERCENT/10) {
+    GrPrintF(dc,0,v-ToF64(i)/MAX_PERCENT*v-FONT_HEIGHT,"%3d%%",i);
+    GrLine(dc,0,v-ToF64(i)/MAX_PERCENT*v,h,v-ToF64(i)/MAX_PERCENT*v);
+  }
+
+  for (i=0;i<NUM_TESTS-1;i++) {
+    dc->color=RED;
+    dc->pen_width=2;
+    GrLine3(dc,i*h/(NUM_TESTS-1),v-results[i	]/MAX_PERCENT*v,0,
+		 (i+1)*h/(NUM_TESTS-1),v-results[i+1]/MAX_PERCENT*v,0);
+    dc->color=GREEN;
+    GrPrintF(dc,i*h/(NUM_TESTS-1),v-FONT_HEIGHT,"10e%d",i+1);
+    GrLine(dc,i*h/(NUM_TESTS-1),0,
+		i*h/(NUM_TESTS-1),v);
+  }
+  PressAKey;
+
+  DCFill;
+  DCDel(dc);
+}
+
+MPAdd;