Messages in this thread |  | | Date | Tue, 13 Nov 2001 12:51:26 +0100 | From | Jakob Østergaard <> | Subject | High UNIX socket latency |
| |
Hello all,
One program that creates a pipe between two processes and measures the ping/pong latency of messages between the two processes gives me something like;
1000 iterations - ping/pong time max = 3495 us min = 6 us avg = 47.212 us
In another application where I use a UNIX STREAM socket, I get a typical latency of one send() of around 1 ms.
I cannot set TCP_NODELAY on a UNIX socket, and I can't really see why I get the high latency. Is there some undocumented option like TCP_NODELAY for UNIX STREAM connections, or are there other tricks I can play to get the latency down ?
One process does a send(), the other one does a select() and a recv() - and the time from the send() to the recv() is around 1 ms which I think seems far too high.
Hints, suggestions ?
Thank you
-- ................................................................ : jakob@unthought.net : And I see the elder races, : :.........................: putrid forms of man : : Jakob Østergaard : See him rise and claim the earth, : : OZ9ABN : his downfall is at hand. : :.........................:............{Konkhra}...............: - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
|  |