Socket timeout semantics

[Alan Bateman]

On 24/09/2019 16:32, Milan Mimica wrote:
> :
>
> I looked into it and found this:
> The difference is how Java_sun_nio_ch_Net_poll is implemented. On unix
> it uses poll(2), on Windows it uses select(2). Regarding timeouts,
> poll() has "wait at least"[2] semantics and overruns by design, while
> select() on windows has "waits at most" semantics, or how they put
> it: "specifies the maximum time that select should wait before
> returning."[3]. It returns early by design! Old, "plain" socket impl
> are not much different.
>
>
System.nanoTime is implemented on QueryPerformanceCounter to read the 
high res time stamp. It's not clear which timer is used by Windows to 
support select (and WSAPoll) - were you able to get any info on that?

-Alan