Re^3: Socket IO with large (>1000) numbers of open sockets

[BrowserUk]

I seams that the time is taken by checkintg to see if there are ready sockets...

There is no way to know from the information you are supplying. Ie. a profile; and either entirely non-representative code or no code at all; and no indication of how much cpu your application is typically using.

You say that you are doing lots of "other stuff" when no input is available, but what if there is none of that 'other stuff' to do either?

In that case, you'll check for input and find nothing and wait no time. You'll check for 'other stuff' and find nothing to do, so you'll go back and check for input again and find nothing, so you'll check for...

It's a tight loop with most of the work (polling 1000 sockets) occuring inside can_read(). So that what profiling shows you.

Again, unless you are using an abnormal amount of cpu when there is little or no socket traffic, the profiles you are posting are not necessarily indicative of a problem.

If you are using a large amount of cpu when there is little or no socket traffic, then it would probably benefit your application to insert a small sleep somewhere.

Eg. if( @ready = can_read( .01 ) ){. That would reduce the 'busy loop' effect when there is nothing to do, and so reduce your cpu usage, but it would probably increase the proportion of time spent in can_read().

But really, without more information, it's just speculation.