Messages in this thread | | | Subject | Re: Linux-1.3.85 - ppp slowdowns gone (?) | Date | Tue, 09 Apr 1996 20:01:41 -0700 | From | Kevin Layer <> |
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For me, the slowness is not gone.
I find that when comparing kernels 1.3.72 and 1.3.85, the latter exhibits severe interactive slowness over CSLIP and PPP connections. When I use minicom to dial into the same system, there is no noticable lag when echo'ing typed characters.
Furthermore, all this talk about Solaris 2 vs. SunOS 4.1 is irrelevant in my case: I'm connecting (with CSLIP) to a Xylogics Micro Annex (where I can then login to either a SunOS 4.1 or Solaris 2 hosts, both of which behave the same). Btw, since the Micro Annex doesn't support PPP, I tested PPP to an ISP (slip.net). The interactive response was worse than CSLIP, but that's probably because of the load on the remote machine (as PPP with 1.3.72 is also worse than CSLIP to my Micro Annex).
The problem is not line noise, either. I've run the tests too many times (at least 30 times). 100% of the time with kernels after 1.3.72 I experience the problem, and 0% of the time with kernel 1.3.72.
The modem in question is a US Robotics 14.4. Linux distribution: Redhat 3.0.3. I use `dip' 3.3.7n to make the CSLIP connection.
Other system info:
/proc/cpuinfo: processor : 0 cpu : 586 model : Pentium 75+ vendor_id : GenuineIntel stepping : 5 fdiv_bug : no hlt_bug : no fpu : yes fpu_exception : yes cpuid : yes wp : yes flags : fpu vme de pse tsc msr mce cx8 bogomips: : 39.73
/proc/devices: Character devices: 1 mem 2 pty 3 ttyp 4 tty 5 cua 6 lp 7 vcs 9 st 14 sound
Block devices: 1 ramdisk 2 fd 3 ide0 8 sd 22 ide1
/proc/dma: 1: SB16 (8bit) 4: cascade 5: SB16 (16bit)
/proc/interrupts: 0: 16547 timer 1: 751 keyboard 2: 0 cascade 3: 828 + serial 5: 0 SoundBlaster 11: 1709 + aic7xxx 13: 1 math error 14: 5 + ide0 15: 0 + ide1
/proc/meminfo: total: used: free: shared: buffers: cached: Mem: 31723520 13283328 18440192 7258112 913408 6082560 Swap: 34582528 0 34582528 MemTotal: 30980 kB MemFree: 18008 kB MemShared: 7088 kB Buffers: 892 kB Cached: 5940 kB SwapTotal: 33772 kB SwapFree: 33772 kB
/proc/ioports: 0000-001f : dma1 0020-003f : pic1 0040-005f : timer 0060-006f : kbd 0070-007f : rtc 0080-009f : dma page reg 00a0-00bf : pic2 00c0-00df : dma2 00f0-00ff : npu 0170-0177 : ide1 01f0-01f7 : ide0 0220-022f : SoundBlaster 02f8-02ff : serial(set) 0376-0376 : ide1 0378-037f : lp 0388-038b : OPL3/OPL2 03c0-03df : vga+ 03f0-03f5 : floppy 03f6-03f6 : ide0 03f7-03f7 : floppy DIR 03f8-03ff : serial(auto) 1000-1007 : IDE DMA 1008-100f : IDE DMA 2000-20be : aic7xxx
/proc/version: Linux version 1.3.85 (root@slow-zone) (gcc version 2.7.2) #4 Tue Apr 9 19:27:46 PDT 1996
Kevin Layer layer@Franz.COM http://www.franz.com/ Franz Inc., 1995 University Avenue, Suite 275, Berkeley, CA 94704, USA Phone: (510) 548-3600 FAX: (510) 548-8253
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