Messages in this thread Patch in this message | | | Date | Thu, 20 May 1999 02:46:24 +0200 | From | Jochen Heuer <> | Subject | [2.2.9] performance problem on 100MBit network |
| |
Hello,
using 2.2.9 on my server or my client brings down the performance on my local network. I'm using SMC Etherpower II on both machines which are connected via a 100MBit hub.
Using ftp the transferrates drop to ~200 k/s (>6 M/s with 2.2.8). If I revert the following part of patch-2.2.9 the network runs at full speed again:
diff -u --recursive --new-file v2.2.8/linux/include/net/tcp.h linux/include/net/tcp.h --- v2.2.8/linux/include/net/tcp.h Tue May 11 13:10:32 1999 +++ linux/include/net/tcp.h Thu May 13 10:33:17 1999 @@ -728,7 +728,7 @@ */ extern __inline__ __u32 tcp_recalc_ssthresh(struct tcp_opt *tp) { - __u32 snd_wnd_packets = tp->snd_wnd / tp->mss_cache; + __u32 snd_wnd_packets = tp->snd_wnd / max(tp->mss_cache, 1); return max(min(snd_wnd_packets, tp->snd_cwnd) >> 1, 2); }
What is the reason behind this patch or can I tune my system using /proc/sys/net ?
Regards,
Jogi
--
Well, yeah ... I suppose there's no point in getting greedy, is there?
<< Calvin & Hobbes >>
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
| |