Date: Thu, 07 Oct 2004 07:58:52 -0400 From: "Thomas Laus" <lausts@acm.org> To: freebsd-alpha@freebsd.org Subject: AlphaStation 255 tty-level buffer overflows Message-ID: <4164F73C.14149.527131@localhost>
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Group: Are there any known problems with the serial ports in FreeBSD 4.10 Alpha implementation? I have a Oncore GPS Reference Clock on sio1 and a Belkin UPS on sio0. I seem to be getting tty-level buffer overflows from the sio1 port. I am running ntpd from the FreeBSD release. The ntp reference clock is polled every 16 seconds. The ups connection to sio0 is also a polled operation every 5 seconds. This setup has been running fine on my Athlon 1GHz server for the past few years. I became the owner of a few AS255's and decided to put one of them to use as my ntp server. My Athlon is also running 4.10 and the same version of all of the base system as the AS255. It's dmesg lists a 16550A serial controller, the same as the AlphaStation. I looked through the FreeBSD mailing list archives for any reference to problems with the AlphaStation serial ports running under FreeBSD, but came up short. My system log: Oct 7 04:04:06 as255 /kernel: sio1: 320 more tty-level buffer overflows (total 117556) Oct 7 04:04:07 as255 /kernel: sio1: 24 more tty-level buffer overflows (total 117580) Oct 7 04:12:18 as255 /kernel: sio1: 111 more tty-level buffer overflows (total 117691) Oct 7 04:12:19 as255 /kernel: sio1: 88 more tty-level buffer overflows (total 117779) Oct 7 04:12:20 as255 ntpd[553]: pps sync disabled Oct 7 04:20:28 as255 ntpd[553]: pps sync enabled Oct 7 05:01:29 as255 /kernel: sio1: 33 more tty-level buffer overflows (total 117880) Oct 7 05:01:30 as255 /kernel: sio1: 228 more tty-level buffer overflows (total 118108) Oct 7 05:01:30 as255 /kernel: sio1: 161 more tty-level buffer overflows (total 118269) Oct 7 05:01:30 as255 /kernel: sio1: 161 more tty-level buffer overflows (total 118430) Oct 7 05:01:32 as255 /kernel: sio1: 104 more tty-level buffer overflows (total 118534) .... shutdown restart .... Oct 7 06:53:27 as255 /kernel: sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0 Oct 7 06:53:27 as255 /kernel: sio0: type 16550A Oct 7 06:53:27 as255 /kernel: sio0: interrupting at ISA irq 4 Oct 7 06:53:27 as255 /kernel: sio1 at port 0x2f8-0x2ff irq 3 on isa0 Oct 7 06:53:27 as255 /kernel: sio1: type 16550A Oct 7 06:53:27 as255 /kernel: sio1: interrupting at ISA irq 3 Tom -- Public Keys: PGP KeyID = 0x5F22FDC1 GnuPG KeyID = 0x620836CF
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