// handler -
func handler(w http.ResponseWriter, r *http.Request) {
tr := trace.Get(r.URL.Path[1:])
dy := divup(trace.MaxBlock(tr), dx)
m := Image{image.Rect(0, 0, dx, dy), make([][dx]bool, dy)}
for _, t := range tr {
for j := 0; j < int(t.Count); j++ {
block := int(t.Block) + j
y := block / dx
x := block % dx
m.Used[y][x] = true
}
}
io.Copy(w, ShowImage(m))
}
func simulateCache(name string) {
tr := trace.Get(name)
noglass(tr)
fmt.Println("size K #segs MiB secs opt avg eff")
for shift := uint(0); shift < MaxShift; shift++ {
segment := make([]uint64, Segment(uint64(trace.MaxBlock(tr)), shift)+1)
for _, t := range tr {
for j := uint32(0); j < t.Count; j++ {
segment[Segment(uint64(t.Block+j), shift)]++
}
}
numsegs := nonzero(segment)
avg := avgHits(segment)
segsize := 1 << shift
fmt.Printf(" %5d %5.3d %5.3d %6.2f %6.2f %6.2f %6.2f%%\n",
4*segsize, numsegs, (numsegs<<shift)*PageSize/Meg,
cost(shift, numsegs), ideal(shift, numsegs),
avg, avg/float64(segsize)*100.)
}
}