Date: Wed, 09 Aug 1995 09:25:18 +0100 From: Marc van Kempen <wmbfmk@urc.tue.nl> To: questions@freebsd.org Subject: funny network speeds Message-ID: <199508090825.JAA27577@nietzsche>
next in thread | raw e-mail | index | archive | help
Hi, I notice a strange difference in the network speed, wether I upload something with ftp, or download it. I have two machines: Nietzsche: Pentium 90 16 MB 550 MB scsi WD8013EPC ed0 at 0x280-0x29f irq 15 maddr 0xd8000 msize 16384 on isa ed0: address 00:00:c0:40:9c:56, type WD8013EPC (16 bit) Zola: 486DX33 16 MB 220 MB ide 3c509 ep0 at 0x300-0x30f irq 10 on isa ep0: aui/bnc/utp[*BNC*] address 00:20:af:27:6e:66 irq 10 nietzsche$ ftp zola ftp> get kernel local: kernel remote: kernel 200 PORT command successful. 150 Opening BINARY mode data connection for 'kernel' (785548 bytes). 226 Transfer complete. 785548 bytes received in 27 seconds (29 Kbytes/s) ftp> put kernel local: kernel remote: kernel 200 PORT command successful. 150 Opening BINARY mode data connection for 'kernel'. 226 Transfer complete. 785548 bytes sent in 1.6 seconds (4.7e+02 Kbytes/s) ftp> zola$ ftp nietzsche ftp> get kernel local: kernel remote: kernel 200 PORT command successful. 150 Opening BINARY mode data connection for 'kernel' (785548 bytes). 226 Transfer complete. 785548 bytes received in 1.1 seconds (7.2e+02 Kbytes/s) ftp> put kernel local: kernel remote: kernel 200 PORT command successful. 150 Opening BINARY mode data connection for 'kernel'. 226 Transfer complete. 785548 bytes sent in 16 seconds (49 Kbytes/s) ftp> It appears that data going from Nietzsche to Zola goes at ~500k/s, where data going from Zola to Nietzsche goes at ~40k/s. When I enabling hashing in ftp (print the # marks) then it is obvious that the dataflow stops after every 40 or 50k for an instant and then continues again. I would say that the interface gets flooded somehow. Any advice on how to tune/change this behaviour would be very much appreciated. Thanks, Marc. ---------------------------------------------------- Marc van Kempen wmbfmk@urc.tue.nl He's dead Jim ..., kick him if you don't believe me.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199508090825.JAA27577>