Also, to clarify, in the absence of more details, I would consider netlink.RouteReplace to be an IO operation - it is calling into the kernel (most likely). Whether that should be considered IO is probably a matter of opinion.
> On Feb 4, 2019, at 9:32 AM, Andrew Medvedev <andrew.y.medve...@gmail.com> > wrote: > > Hi Robert > > The program is not IO bound. Sorry for not giving out the source code in the > first place, here is a no-channel version > https://github.com/andrewmed/loadroutes/blob/master/cmd/main.go and here is a > slower channels version > https://github.com/andrewmed/loadroutes/blob/test/channels/cmd/main.go both > versions use bufio and profiling info does not suggest substantial IO waiting > times. > > In terminology of boundness, I think, the program is "syscall" bound, it is > the receiving end for the program. Again I am not sure I personally am able > to do anything about it > > My question is, how comes that adding one channel on producer where slower > part is the "receiver" end (that is, producer is blocked waiting for receiver > channel become available) adds to total runtime 2s compared to no-channels > "only fn-callback" version. > > Is this a necessary cost of synchronizing on over 400_000 values over a > channel? > > On Monday, February 4, 2019 at 3:56:32 PM UTC+3, Robert Engels wrote: > Reading and writing to a channel has locks behind the scenes. Locks are > implemented with futexes. > > If your program is IO bound the simplest solution is often to use buffering > in the IO to perform more work per IO operation. >> > > > -- > You received this message because you are subscribed to the Google Groups > "golang-nuts" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to golang-nuts+unsubscr...@googlegroups.com > <mailto:golang-nuts+unsubscr...@googlegroups.com>. > For more options, visit https://groups.google.com/d/optout > <https://groups.google.com/d/optout>. -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
