func TestSpc1Init(t *testing.T) {
// initialize
var cache *cache.CacheMap
usedirectio := false
blocksize := 4 * KB
s := NewSpcInfo(cache, usedirectio, blocksize)
// Set fake len
s.asus[ASU1].len = 5500
s.asus[ASU2].len = 4500
// Set asu3 to a value that is too small
s.asus[ASU3].len = 1
bsu := 50
contexts := 1
err := s.Spc1Init(bsu, contexts)
// It should not accept a value of asu3
// because it is too small
tests.Assert(t, err != nil)
// Set fake len
s.asus[ASU1].len = 5500
s.asus[ASU2].len = 4500
s.asus[ASU3].len = 1000
err = s.Spc1Init(bsu, contexts)
// Now it should succeed
tests.Assert(t, err == nil)
// Check that the sizes where adjusted
tests.Assert(t, s.asus[ASU1].len == 4500)
tests.Assert(t, s.asus[ASU2].len == 4500)
tests.Assert(t, s.asus[ASU3].len == 1000)
// Check spc1 was initialized
io := spc1.NewSpc1Io(1)
err = io.Generate()
tests.Assert(t, err == nil)
}
// Use as a goroutine to start the io workload
// Create one of these per context set on Spc1Init()
func (s *SpcInfo) Context(wg *sync.WaitGroup,
iotime chan<- *IoStats,
quit <-chan struct{},
runlen, context int) {
defer wg.Done()
// Spc generator specifies that each context have
// 8 io streams. Spc generator will specify which
// io stream to use.
streams := 8
iostreams := make([]chan *IoStats, streams)
var iostreamwg sync.WaitGroup
for stream := 0; stream < streams; stream++ {
// Allow for queued requests
iostreams[stream] = make(chan *IoStats, 64)
// Create 32 io contexts per stream
for i := 0; i < 32; i++ {
iostreamwg.Add(1)
go s.sendio(&iostreamwg, iostreams[stream], iotime)
}
}
start := time.Now()
lastiotime := start
stop := time.After(time.Second * time.Duration(runlen))
ioloop := true
for ioloop {
select {
case <-quit:
ioloop = false
case <-stop:
ioloop = false
default:
// Get the next io
io := spc1.NewSpc1Io(context)
err := io.Generate()
godbc.Check(err == nil)
godbc.Invariant(io)
// Check how much time we should wait
sleep_time := start.Add(io.When).Sub(lastiotime)
if sleep_time > 0 {
time.Sleep(sleep_time)
}
// Send io to io stream
iostreams[io.Stream] <- &IoStats{
Io: io,
Start: time.Now(),
}
lastiotime = time.Now()
}
}
// close the streams for this context
for stream := 0; stream < streams; stream++ {
close(iostreams[stream])
}
iostreamwg.Wait()
}