Severe Network Slowdown

From: Bryan Whitehead (driver@technologist.com)
Date: Mon Mar 13 2000 - 05:24:38 EST


1. Major network slowdown on newer kernel's using RT8139.

2. Using Kernel 2.2.14 and 2.3.41 have no problems. Kernel 2.3.42-2.3.49
Had problems with my sound card so i havn't test those ones... But
Kerenl 2.3.50-2.3.51 My RT8139 NIC can only send at 100- 150k/sec. Just
rebooting to the 2.2.14 or 2.3.41 Kernel will keep my NIC at 1.07MB/sec
rate. Note that recieve has no problems just sending on Kernel
2.3.50-2.3.51.

3. NIC network tcpip 8139too slow send transmit

4. Linux version 2.3.51 (root@mrhankey) (gcc version 2.95.2 19991024
(release)) #2 Sat Mar 11 15:34:51 PST 2000

5. No oops

6. Used ncftp to send file (700MB). Link was direct - not sharing
bandwidth with anyone else.

7. Mandrake 7.0
7.1.
-- Versions installed: (if some fields are empty or look
-- unusual then possibly you have very old versions)
Linux mrhankey 2.3.51 #2 Sat Mar 11 15:34:51 PST 2000 i686 unknown
Kernel modules 2.1.121
Gnu C 2.95.2
Binutils 2.9.5.0.16
Linux C Library 2.1.2
Dynamic linker ldd (GNU libc) 2.1.2
Procps 2.0.6
Mount 2.9y
Net-tools 1.53
Console-tools 0.2.2
Sh-utils 2.0
Modules Loaded nfs lockd sunrpc 8139too vfat fat es1370
soundcore
7.2.
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 6
model name : Celeron (Mendocino)
stepping : 0
cpu MHz : 450.007957
cache size : 128 KB
fdiv_bug : no
hlt_bug : no
sep_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat
pse36 mmx fxsr
bogomips : 442.37
7.3.
nfs 33564 2 (autoclean)
lockd 50364 1 (autoclean) [nfs]
sunrpc 58820 1 (autoclean) [nfs lockd]
8139too 13932 1 (autoclean)
vfat 10348 0 (unused)
fat 31808 0 [vfat]
es1370 25748 0 (unused)
soundcore 3716 4 [es1370]
7.4.
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
  Vendor: IBM Model: DDRS-34560D Rev: DC1B
  Type: Direct-Access ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 05 Lun: 00
  Vendor: IOMEGA Model: ZIP 100 Rev: E.03
  Type: Direct-Access ANSI SCSI revision: 02
7.5.
Here's /proc/pci if needed....
PCI devices found:
  Bus 0, device 0, function 0:
    Host bridge: Intel Corporation 440BX/ZX - 82443BX/ZX Host bridge
(rev 3).
      Master Capable. Latency=32.
      Prefetchable 32 bit memory at 0xd8000000 [0xdbffffff].
  Bus 0, device 1, function 0:
    PCI bridge: Intel Corporation 440BX/ZX - 82443BX/ZX AGP bridge (rev
3).
      Master Capable. Latency=64. Min Gnt=128.
  Bus 0, device 7, function 0:
    ISA bridge: Intel Corporation 82371AB PIIX4 ISA (rev 2).
  Bus 0, device 7, function 1:
    IDE interface: Intel Corporation 82371AB PIIX4 IDE (rev 1).
      Master Capable. Latency=32.
      I/O at 0xf000 [0xf00f].
  Bus 0, device 7, function 2:
    USB Controller: Intel Corporation 82371AB PIIX4 USB (rev 1).
      IRQ 11.
      Master Capable. Latency=32.
      I/O at 0xe000 [0xe01f].
  Bus 0, device 7, function 3:
    Bridge: Intel Corporation 82371AB PIIX4 ACPI (rev 2).
  Bus 0, device 9, function 0:
    VGA compatible controller: S3 Inc. 86c968 [Vision 968 VRAM] rev 0
(rev 0).
      IRQ 10.
      Non-prefetchable 32 bit memory at 0x10000000 [0x13ffffff].
  Bus 0, device 11, function 0:
    SCSI storage controller: Adaptec AIC-7881U (rev 0).
      IRQ 12.
      Master Capable. Latency=32. Min Gnt=8.Max Lat=8.
      I/O at 0xe400 [0xe4ff].
      Non-prefetchable 32 bit memory at 0xe5000000 [0xe5000fff].
  Bus 0, device 13, function 0:
    Multimedia audio controller: Ensoniq ES1370 [AudioPCI] (rev 0).
      IRQ 7.
      Master Capable. Latency=32. Min Gnt=12.Max Lat=128.
      I/O at 0xe800 [0xe83f].
  Bus 0, device 15, function 0:
    Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139 (rev
16).
      IRQ 11.
      Master Capable. Latency=32. Min Gnt=32.Max Lat=64.
      I/O at 0xec00 [0xecff].
      Non-prefetchable 32 bit memory at 0xe5001000 [0xe50010ff].

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