UDP Emitter Signal Characterization Results

Description:

  • The results here show the effect of interrupt coalescing in measurements at the NIC layer. Basically, as we can see in the smallest granularity histograms, we have packets 3-5 usecs apart, but this should be impossible under per packet interrupt, therefore we suffer some interrupt coalescing (Intel 1000MT card have an absolute, per packet and throttle interrupt delays). The results are under a variety of offered loads 100Mbps to 1000Mbps.

    • Rate = 100Mbps
    in order Histogram (1 msec) (30usec) and Empirical CDF (800usec)
        
    Rate = 200Mbps
    in order Histogram (1 msec) (30usec) and Empirical CDF (800usec)
        
    Rate = 300Mbps
    in order Histogram (1 msec) (30usec) and Empirical CDF (800usec)
        
    Rate = 400Mbps
    in order Histogram (1 msec) (30usec) and Empirical CDF (800usec)
        
    Rate = 500Mbps
    in order Histogram (1 msec) (30usec) and Empirical CDF (800usec)
        
    Rate = 600Mbps
    in order Histogram (400 usec) (30usec) and Empirical CDF (800usec)
        
    Rate = 700Mbps
    in order Histogram (400 usec) (30usec) and Empirical CDF (800usec)
        
    Rate = 800Mbps
    in order Histogram (400 usec) (30usec) and Empirical CDF (800usec)
        
    Rate = 900Mbps
    in order Histogram (400 usec) (30usec) and Empirical CDF (800usec)
        
    Rate = 1000Mbps
    in order Histogram (400 usec) (30usec) and Empirical CDF (800usec)