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Date:      Sun, 23 May 2004 23:12:49 +0200
From:      Joan Picanyol <lists-freebsd@biaix.org>
To:        freebsd-questions@freebsd.org
Subject:   bad gnome responsiveness with network load
Message-ID:  <20040523211249.GA19381@grummit.biaix.org>

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--pWyiEgJYm5f9v55/
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Hi,

Summary: with /home NFS mounted at 10Mbit/s, network i/o
makes my sytem noticeably slower (as in GNOME interactivity). I'm running
RELENG_5_2, with SCHED_ULE and ADAPTIVE_MUTEXES. 

[look at the end for the -questions]

Some system details (long lines):

528,p4,0$ dmesg | grep -v Preloaded | head -16
Copyright (c) 1992-2004 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
        The Regents of the University of California. All rights reserved.
FreeBSD 5.2.1-RELEASE #0: Sun Apr 11 15:23:13 CEST 2004
    joan@calvin.biaix.org:/usr/obj/usr/src/sys/CALVIN
module_register: module vesa already exists!
Module vesa failed to register: 17
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: AMD Athlon(tm) MP 2400+ (2000.08-MHz 686-class CPU)
  Origin = "AuthenticAMD"  Id = 0x681  Stepping = 1
  Features=0x383fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE>
  AMD Features=0xc0480000<MP,AMIE,DSP,3DNow!>
real memory  = 536346624 (511 MB)
avail memory = 515440640 (491 MB)
ACPI APIC Table: <PTLTD          APIC  >
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs

521,p4,0$ cat /etc/libmap.conf
libc_r.so.5     libkse.so.1
libc_r.so       libkse.so

I've started to use pan (the GNOME newsreader), and when I "Get New
Headers" it slows the system down: I get long delays when trying to
start gnome-terminal, vim, ssh -X host 'xterm -e mutt', switching
desktops or windows... During this time I see the network load go up
(output of 'netstat -w 5' and 'vmstat -w 5' attached), which I assume
it's because it does heavy i/o from ~/.pan/ (NFS mounted). This doesn't
happen if the system is under high cpu load, and neither does the cpu
load go up when it happens. 

Given it's a fast machine and that pan uses at least 4 threads, I wouldn't
expect that one program waiting for the network slows everything down.
Is there anything I might have misconfigured? What else should I look at
to find out what's happening?

tks
-- 
pica

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Content-Disposition: attachment; filename="netstat-i5.out"

            input        (Total)           output
   packets  errs      bytes    packets  errs      bytes colls
        14     0       2252         14     0       2412     0
         6     0        972          6     0       1020     0
         4     0        648          4     0        680     0
         3     0        486          3     0        510     0
         7     0       1158          7     0       1214     0
         7     0       1042          7     0       1114     0
        51     0       5282         51     0       6266     0
         3     0        486          3     0        510     0
         3     0        486          3     0        510     0
        11     0       1774         11     0       1886     0
        11     0       1750         11     0       1934     0
      1124     0    1454225        298     0      57734     0
      4339     0    5672230       1057     0     188616     0
      4222     0    5718896        891     0     156866     0
      4119     0    5713968        782     0     142022     0
      1070     0    1409540        604     0     601633     0
       310     0      62440       2674     0    3795940     0
       293     0      59298       2334     0    3294460     0
       503     0     109436       3410     0    4740849     0
       360     0      90464       2534     0    3510504     0
            input        (Total)           output
   packets  errs      bytes    packets  errs      bytes colls
       486     0      93290       2887     0    3920730     0
       494     0     110604       3009     0    4133536     0
       286     0      57404       2320     0    3262816     0
       223     0      45536       1190     0    1568384     0
         0     0          0          0     0          0     0
         6     0        972          6     0       1020     0
         3     0        486          3     0        510     0
         3     0        486          3     0        510     0
        96     0      27776         57     0       4634     0
       122     0      37352         82     0       7824     0
        49     0       9330         28     0       2320     0
         4     0        546          3     0        510     0
         3     0        486          3     0        510     0
         7     0       1134          7     0       1190     0
        34     0      12756         24     0       2376     0
        15     0       2324         18     0       1907     0

--pWyiEgJYm5f9v55/
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment; filename="vmstat-w5.out"

 procs      memory      page                    disks     faults      cpu
 r b w     avm    fre  flt  re  pi  po  fr  sr ad0 ad2   in   sy  cs us sy id
 0 3 0  687424  23524  173   0   0   0 165  22   0   0  382    0 701  3  1 96
 0 3 0  684448  25048   63   0   0   0 132   0   0   0  456    0 2175  5  2 92
 0 3 0  685572  24864   20   0   0   0  12   0   0   1  341    0 815  2  2 96
 0 3 0  685572  24864    0   0   0   0   0   0   0   0  339    0 532  1  1 98
 0 3 0  686680  24704   20   0   0   0  12   0   0   1  340    0 582  2  2 97
 0 3 0  686712  24672   25   0   0   0  24   0   0   1  365    0 636  2  1 97
 0 3 1  687820  24512   16   0   0   0   9   0   0   1  341    0 721  2  1 97
 1 3 1  687820  24508  179   0   0   0 162   0   0   0  362    0 540  1  2 97
 0 3 0  688924  24344   20   0   0   0   7   0   0   1  342    0 906  2  2 96
 0 3 0  688928  24340    4   0   0   0   4   0   0   0  374    0 743  3  2 95
 0 3 0  688928  24340    3   0   0   0   3   0   0   2  395    0 813  2  2 96
 0 3 0  688928  24340   88   0   0   0  88   0   0   0  443    0 2257  5  3 92
 0 4 0  688928  40936  103   0   0   0 1026   0   0   3 1116    0 4204  7  4 89
 0 5 0  691184  33688  652   0   0   0 371   0   0   0 2369    0 8276 13  7 80
 0 4 1  692276  28512  220   0   0   0 124   0   0   1 2200    0 6755  7  7 87
 0 4 0  690956  23200  553   0   0   0 316   0   0   0 2262    0 8075 13  8 79
 0 4 0  696272  31672  590   7  10   0 780 738   0  16  859    0 3410 27  4 68
 0 6 0  692240  30272  110   1   1   0 141   0   0  10 1073    0 4432  4  5 91
 procs      memory      page                    disks     faults      cpu
 r b w     avm    fre  flt  re  pi  po  fr  sr ad0 ad2   in   sy  cs us sy id
 0 5 1  692240  28040   24   0   0   0  39   0   0   2  967    0 3654  3  5 93
 0 6 0  692240  24896    3   0   0   0 159   0   0  10 1214    0 5034  2  5 92
 0 4 0  692240  23072   32   1   1   0 137   0   0   2  982    0 3609  3  4 93
 0 5 0  692372  19976   26   0   0   0 154   0   0   2 1090    0 4276  1  5 94
 0 4 1  692500  29840    7   0   0   1 137 4300   0   1 1089    0 4096  1  5 94
 0 4 0  692500  27784    1   0   0   0 103   0   0   2  887    0 2923  0  4 96
 0 3 0  692500  27468    0   0   0   0  16   0   0   0  584    0 1730  3  2 95
 0 3 0  692500  27468    0   0   0   0   0   0   0   0  331    0 363  0  1 99
 0 3 1  692500  27468    0   0   0   0   0   0   0   1  332    0 368  0  1 99
 0 3 0  692500  27468    0   0   0   0   0   0   0   0  331    0 366  0  1 99
 0 3 0  692500  27468    0   0   0   0   0   0   0   0  331    0 361  0  1 98
 0 3 0  692500  27464    0   0   0   0   0   0   0   0  386    0 584  0  2 98
 1 3 0  692500  27464    1   0   0   0   0   0   0   0  393    0 689  0  1 98
 0 3 0  692500  27464    1   0   0   0   0   0   0   0  355    0 443  0  1 99
 0 3 0  692500  27464    0   0   0   0   1   0   0   0  332    0 355  0  1 99
 0 3 0  692500  27464    0   0   0   0   0   0   0   1  335    0 356  0  1 99
 1 3 0  692500  27464    0   0   0   0   0   0   0   0  331    0 331  0  1 99
 0 3 1  692500  27464    0   0   0   0   1   0   0   2  354    0 535  0  2 98
 procs      memory      page                    disks     faults      cpu
 r b w     avm    fre  flt  re  pi  po  fr  sr ad0 ad2   in   sy  cs us sy id
 1 3 0  689648  28456   37   0   0   0  76   0   0   0  696    0 2226  6  3 92

--pWyiEgJYm5f9v55/--



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