Network DEV Analysis

Here is an example to evaluate the time elapsed on a net_dev handler and on which cpu it runs.

global value
global netpstats
global cpustats
global init_time
probe begin
{
    init_time = gettimeofday_ms()
}
probe module("e1000").function("e1000_xmit_frame")
{
    value = gettimeofday_ns()
    cpustats <<< cpu()
}
probe module("e1000").function("e1000_xmit_frame").return
{
    diff = gettimeofday_ns() - value
    netpstats <<< diff
}
probe timer.s(5)
{
    exit();
}
probe end
{
    print(@hist_linear(netpstats,0, 15000, 500))
    print(@hist_log(cpustats))
    printf("Total time: %d miliseconds\n", gettimeofday_ms() - init_time)
}