Messages in this thread | | | Date | Wed, 02 Jan 2002 19:26:15 +0100 | From | Edgar Toernig <> | Subject | Re: strange TCP stack behiviour with write()es in pieces |
| |
Michal Moskal wrote: > > So, it occurs in programs doing packet communication over TCP, when > peer waits for a packet to send an answer. If they send data with two > write() calls (for example to write packet header and packet data), > the performance dramaticly decrases (down to exactly 100 (2.2.19) > or 25 (2.4.[57]) packet exchanges per second on x86, from several > thousands. 100 seems to be related to HZ variable, see also AXP results, > where HZ is 10 times bigger).
Try disabling the nagle algorithm:
int i = 1; if (setsockopt(fd, SOL_TCP, TCP_NODELAY, &i, sizeof(i)) == -1) perror("TCP_NODELAY");
Ciao, ET. - 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/
| |