1 #include "stdinc.h"
2 
3 enum {
4 	Nblock = 300000,
5 	BlockSize = 8*1024
6 };
7 
8 uchar data[Nblock*VtScoreSize];
9 int rflag;
10 int nblock = 10000;
11 int perm[Nblock];
12 
13 void
14 main(int argc, char *argv[])
15 {
16 	VtSession *z;
17 	int i, j, t;
18 	int start;
19 	uchar buf[BlockSize];
20 
21 	srand(time(0));
22 
23 	ARGBEGIN{
24 	case 'r':
25 		rflag++;
26 		break;
27 	case 'n':
28 		nblock = atoi(ARGF());
29 		break;
30 	}ARGEND
31 
32 	for(i=0; i<nblock; i++)
33 		perm[i] = i;
34 
35 	if(rflag) {
36 		for(i=0; i<nblock; i++) {
37 			j = nrand(nblock);
38 			t = perm[j];
39 			perm[j] = perm[i];
40 			perm[i] = t;
41 		}
42 	}
43 
44 	if(readn(0, data, VtScoreSize*nblock) < VtScoreSize*nblock)
45 		sysfatal("read failed: %r");
46 
47 	vtAttach();
48 
49 	z = vtDial("iolaire2");
50 	if(z == nil)
51 		sysfatal("cound not connect to venti");
52 	if(!vtConnect(z, 0))
53 		vtFatal("vtConnect: %s", vtGetError());
54 
55 	print("starting\n");
56 
57 	start = times(0);
58 
59 	if(rflag && nblock > 10000)
60 		nblock = 10000;
61 
62 	for(i=0; i<nblock; i++) {
63 		if(vtRead(z, data+perm[i]*VtScoreSize, VtDataType, buf, BlockSize) < 0)
64 			vtFatal("vtRead failed: %d: %s", i, vtGetError());
65 	}
66 
67 	print("time = %f\n", (times(0) - start)*0.001);
68 
69 	vtClose(z);
70 	vtDetach();
71 }