Hi all.
Suppose I have an application that needs to send the very same data to
several sockets already connected. In this case, the application has
to call the sendto() syscall several times:
for(...)
sendto(...)
This makes the application waste time in entering/exiting the kernel
level several times.
Moreover, if I'm not wrong, the kernel is free to execute pending work
(e.g., softirqs) when returning from a syscall, making the application
experience further latency.
I therefore wonder if a mechanism exists for sending the data to
several sockets using just a single syscall. If not, has anybody ever
thought about adding a syscall like the following ?
sendto-multicast(..., int number_of_sockets, int* const sockets [])
I can't see any obvious reason why such an approach could be wrong.
Many thanks,
Claudio
