Messages in this thread | | | Date | Tue, 22 Jul 1997 13:39:47 -0600 (MDT) | From | Rob Riggs <> | Subject | Re: 2.0.30 serial.c, ppp.c and pppd-2.2 questions |
| |
On 22-Jul-97 Theodore Y. Ts'o wrote: >Rob, what else do you have on your system? Although I haven't done the >test in a while, the serial driver was originally written to be able to >support 115kbaud on a 386/40. (Granted this was a kermit transfers, not >PPP; but it was a looped back 115kbaud transfer where the transmitting >and receiving ports were on the same CPU, doubling the work.) > >The fact that your 486/66 isn't keeping up makes me wonder what other >sources of interrupts you are having on your system.
I have a caching IDE controller (UltraStor) running 'hdparm -u 1', an NE2000 clone NIC, a MS busmouse, and 3 other serial ports (of which only one is occasionally in use at 38400bps). The buffer overruns occur when transfering across the net via a masqueraded connection or NFS, or when writing directly to the local HD.
None of the devices seem to generate an extrordinary number of interrupts (guaged by viewing /proc/interrupts).
-Rob
| |