Re: Process wakeups when idle and power consumption

On Mon, May 9, 2011 at 8:27 PM, Peter Geoghegan <peter(at)2ndquadrant(dot)com> wrote:
> On 9 May 2011 11:19, Heikki Linnakangas
> <heikki(dot)linnakangas(at)enterprisedb(dot)com> wrote:
>
>> Can't we use the pipe trick on Windows? The API is different, but we use
>> pipes on Windows for other things already. When a process is launched, open
>> a pipe between postmaster and the child process. In the child, spawn a
>> thread that just calls ReadFile() on the pipe, which blocks. If postmaster
>> dies, the ReadFile() call will return with an error.
>
> Alright. I'm currently working on a proof-of-concept implementation of
> that. In the meantime, any thoughts on how this should meld with the
> existing latch implementation?

How about making WaitLatch monitor the file descriptor for the pipe
by using select()?

Regards,

--
Fujii Masao
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
NTT Open Source Software Center