I've tried to use Mr. Gearheart's patch for Kernel 2.4.18 and rtlinux-3.1, found on ftp.fsmlabs.com/pub/rtlinux/contrib/gearheart/. Mostly it went smooth, but I've found strange behaviour. I would like to get some information about this.
I've used NI's 8176(PentiumIII-S 1.26GHz, 128MByte) SBC for PXI (CompactPCI + PXI extention) system. Kernel 2.4.18 + rtl3.1 with above patch shows 400 to 500 microsec latency, which is unexpectedly large, with examples/measurement test-program. Kernel 2.4.4 + rtl3.0 on the same machine gives acceptable value, well below 10 microsec (1.5 most of the time, 5 to 6 sometimes). Has anybody seen this kind of behaviour with 2.4.18 + rtl3.1 ? Any insight given will be much appreciated. (Actually I've tried 2.2.19 and 2.2.21 kernel on that machine, but those kernels don't seem to support PentiumIII-S properly. "insmod rtl_time.o" causes kernel panic, so does "cat /proc/interrupts". That's why I'm trying 2.4 kernel.) ================================= Masahiro ABE, A&D Co., Ltd. Japan -- [rtl] --- To unsubscribe: echo "unsubscribe rtl" | mail [EMAIL PROTECTED] OR echo "unsubscribe rtl <Your_email>" | mail [EMAIL PROTECTED] -- For more information on Real-Time Linux see: http://www.rtlinux.org/
