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Re: [K12OSN] LTSP Lab Slow to Boot



I personally don't see anything out of line with your server, based on the 
info you've provided.  The only thing that comes to mind is a possible 
bandwidth issue if your 8 or 9 clients are doing any heavy screen updates (e. 
g. TuxType or any Flash).  If the TigerSwitch is indeed a 10/100 switch, then 
your server's on a 100Mbps port, and those are pretty easy to overwhelm with 
X11 traffic.  This could cause the symptoms that you're seeing.  That's why 
it's better to put the server (at least eth0) on Gig-E.

If your server's eth0 is on Gig-E, and you don't have any 10/100 bottlenecks 
between it and the clients, then there's one other possibility that comes to 
mind.  I've had some thin client stability issues with Edubuntu before, one 
of them in the middle of an LTSP demo.  Fortunately, I also had a K12LTSP 5EL 
box, which saved my butt big-time that day.  Do you have a spare machine that 
you can put K12LTSP 4EL or 5EL on and, for troubleshooting purposes only, 
swap out the Edubuntu box for this box?

--TP

On Friday 05 September 2008 12:52, Crampton, Stephen C. wrote:
> My LTSP clients take a long time to boot.  Some of the first ones boot in
> about a minute, but after about 8 or 9 are up, the others keep saying "No
> DHCP Offers Received."  If I leave them long enough, they eventually all
> boot.
>
> Another clue:  It takes over a minute for the first sudo command to accept
> the root password.
>
> Could someone please give me some suggestions?  Here's what I can tell you
> about the setup.
>
> Edubuntu 8.04
>
> SWITCH
>
> SMC TigerSwitch 10/100 6128L2
>
>
> CLIENTS
>
> Lenovo machines with Intel processors
>
>
> SERVER
>
> mrc Ada:/proc$ cat cpuinfo
> processor	: 0
> vendor_id	: AuthenticAMD
> cpu family	: 15
> model		: 107
> model name	: AMD Athlon(tm) 64 X2 Dual Core Processor 4000+
> stepping	: 1
> cpu MHz		: 2101.332
> cache size	: 512 KB
> physical id	: 0
> siblings	: 2
> core id		: 0
> cpu cores	: 2
> fdiv_bug	: no
> hlt_bug		: no
> f00f_bug	: no
> coma_bug	: no
> fpu		: yes
> fpu_exception	: yes
> cpuid level	: 1
> wp		: yes
> flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat
> pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt rdtscp lm
> 3dnowext 3dnow pni cx16 lahf_lm cmp_legacy svm extapic cr8_legacy
> 3dnowprefetch ts fid vid ttp tm stc 100mhzsteps bogomips	: 4205.03
> clflush size	: 64
>
> processor	: 1
> vendor_id	: AuthenticAMD
> cpu family	: 15
> model		: 107
> model name	: AMD Athlon(tm) 64 X2 Dual Core Processor 4000+
> stepping	: 1
> cpu MHz		: 2101.332
> cache size	: 512 KB
> physical id	: 0
> siblings	: 2
> core id		: 1
> cpu cores	: 2
> fdiv_bug	: no
> hlt_bug		: no
> f00f_bug	: no
> coma_bug	: no
> fpu		: yes
> fpu_exception	: yes
> cpuid level	: 1
> wp		: yes
> flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat
> pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt rdtscp lm
> 3dnowext 3dnow pni cx16 lahf_lm cmp_legacy svm extapic cr8_legacy
> 3dnowprefetch ts fid vid ttp tm stc 100mhzsteps bogomips	: 4202.52
> clflush size	: 64
>
>
>
> mrc Ada:/proc$ ifconfig
> eth0      Link encap:Ethernet  HWaddr 00:18:f8:0b:40:0d
>           inet addr:192.168.0.254  Bcast:192.168.0.255  Mask:255.255.255.0
>           inet6 addr: fe80::218:f8ff:fe0b:400d/64 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:253305 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:309896 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000
>           RX bytes:46515129 (44.3 MB)  TX bytes:301639706 (287.6 MB)
>           Interrupt:20 Base address:0xcc00
>
> eth1      Link encap:Ethernet  HWaddr 00:1d:60:b7:ad:a7
>           inet addr:169.157.241.64  Bcast:169.157.241.255 
> Mask:255.255.255.0 inet6 addr: fe80::21d:60ff:feb7:ada7/64 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:8010 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:1607 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000
>           RX bytes:1006100 (982.5 KB)  TX bytes:205995 (201.1 KB)
>           Interrupt:19 Base address:0x4800
>
> lo        Link encap:Local Loopback
>           inet addr:127.0.0.1  Mask:255.0.0.0
>           inet6 addr: ::1/128 Scope:Host
>           UP LOOPBACK RUNNING  MTU:16436  Metric:1
>           RX packets:1063 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:1063 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:0
>           RX bytes:56736 (55.4 KB)  TX bytes:56736 (55.4 KB)
>
>
> mrc Ada:/proc$ cat loadavg
> 0.09 0.14 0.06 4/626 16166
> mrc Ada:/proc$ cat meminfo
> MemTotal:      3107580 kB
> MemFree:       1828200 kB
> Buffers:         27004 kB
> Cached:         418752 kB
> SwapCached:          0 kB
> Active:         894940 kB
> Inactive:       274108 kB
> HighTotal:     2227904 kB
> HighFree:      1065644 kB
> LowTotal:       879676 kB
> LowFree:        762556 kB
> SwapTotal:     9100780 kB
> SwapFree:      9100780 kB
> Dirty:              48 kB
> Writeback:           0 kB
> AnonPages:      723452 kB
> Mapped:          71072 kB
> Slab:            37780 kB
> SReclaimable:    17272 kB
> SUnreclaim:      20508 kB
> PageTables:      10208 kB
> NFS_Unstable:        0 kB
> Bounce:              0 kB
> CommitLimit:  10654568 kB
> Committed_AS:  2302184 kB
> VmallocTotal:   114680 kB
> VmallocUsed:      8420 kB
> VmallocChunk:   106148 kB
> mrc Ada:/proc$
>
>
> mrc Ada:/proc$ cat modules
> snd_rtctimer 4640 1 - Live 0xf8fff000
> binfmt_misc 12808 1 - Live 0xf9040000
> via 43648 2 - Live 0xf9010000
> drm 82452 3 via, Live 0xf902a000
> rfcomm 41744 2 - Live 0xf9004000
> l2cap 25728 13 rfcomm, Live 0xf8fdb000
> bluetooth 61156 4 rfcomm,l2cap, Live 0xf8fe6000
> ppdev 10372 0 - Live 0xf8add000
> cpufreq_stats 7104 0 - Live 0xf8ab7000
> cpufreq_powersave 2688 0 - Live 0xf8867000
> cpufreq_conservative 8712 0 - Live 0xf8ad9000
> cpufreq_userspace 5284 0 - Live 0xf8ac5000
> cpufreq_ondemand 9740 0 - Live 0xf8ad0000
> freq_table 5536 2 cpufreq_stats,cpufreq_ondemand, Live 0xf8ac2000
> video 19856 0 - Live 0xf8aca000
> output 4736 1 video, Live 0xf8aba000
> sbs 15112 0 - Live 0xf8abd000
> sbshc 7680 1 sbs, Live 0xf8a97000
> container 5632 0 - Live 0xf8a9a000
> dock 11280 0 - Live 0xf8ab3000
> battery 14212 0 - Live 0xf8aae000
> iptable_filter 3840 0 - Live 0xf884e000
> ip_tables 14820 1 iptable_filter, Live 0xf8a9d000
> x_tables 16132 1 ip_tables, Live 0xf8a58000
> ac 6916 0 - Live 0xf8a62000
> parport_pc 36260 0 - Live 0xf8aa4000
> lp 12324 0 - Live 0xf8a5d000
> parport 37832 3 ppdev,parport_pc,lp, Live 0xf8a8c000
> loop 18948 0 - Live 0xf8a3d000
> af_packet 23812 4 - Live 0xf8a85000
> ipv6 267780 64 - Live 0xf8b37000
> usbhid 31872 0 - Live 0xf8a7c000
> hid 38784 1 usbhid, Live 0xf8a71000
> usblp 15872 0 - Live 0xf89f2000
> evdev 13056 4 - Live 0xf8a2b000
> snd_hda_intel 344728 5 - Live 0xf8ae1000
> snd_pcm_oss 42144 0 - Live 0xf8a65000
> snd_mixer_oss 17920 1 snd_pcm_oss, Live 0xf8a32000
> snd_pcm 78596 2 snd_hda_intel,snd_pcm_oss, Live 0xf8a43000
> snd_page_alloc 11400 2 snd_hda_intel,snd_pcm, Live 0xf89fb000
> snd_hwdep 10500 1 snd_hda_intel, Live 0xf89f7000
> snd_seq_dummy 4868 0 - Live 0xf89dc000
> snd_seq_oss 35584 0 - Live 0xf8a21000
> snd_seq_midi 9376 0 - Live 0xf89e0000
> amd64_agp 13444 0 - Live 0xf89ed000
> snd_rawmidi 25760 1 snd_seq_midi, Live 0xf89e5000
> via_agp 11136 1 - Live 0xf8983000
> button 9232 0 - Live 0xf89d3000
> snd_seq_midi_event 8320 2 snd_seq_oss,snd_seq_midi, Live 0xf8987000
> pcspkr 4224 0 - Live 0xf8980000
> shpchp 34452 0 - Live 0xf89c9000
> pci_hotplug 30880 1 shpchp, Live 0xf896f000
> agpgart 34760 3 drm,amd64_agp,via_agp, Live 0xf898c000
> snd_seq 54224 7 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_midi_event,
> Live 0xf89ba000 snd_timer 24836 3 snd_rtctimer,snd_pcm,snd_seq, Live
> 0xf8978000
> snd_seq_device 9612 5
> snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawmidi,snd_seq, Live 0xf8847000
> snd 56996 23
> snd_rtctimer,snd_hda_intel,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_hwdep,snd_
>seq_dummy,snd_seq_oss,snd_rawmidi,snd_seq,snd_timer,snd_seq_device, Live
> 0xf8952000 soundcore 8800 1 snd, Live 0xf893a000
> k8temp 6656 0 - Live 0xf889b000
> ext3 136712 1 - Live 0xf8997000
> jbd 48404 1 ext3, Live 0xf8962000
> mbcache 9600 1 ext3, Live 0xf882b000
> sr_mod 17956 0 - Live 0xf8941000
> cdrom 37408 1 sr_mod, Live 0xf8947000
> sg 36880 0 - Live 0xf8926000
> sd_mod 30720 3 - Live 0xf8931000
> pata_acpi 8320 0 - Live 0xf889f000
> pata_via 13316 0 - Live 0xf8921000
> ata_generic 8324 0 - Live 0xf8878000
> r8169 32900 0 - Live 0xf8917000
> uhci_hcd 27024 0 - Live 0xf8893000
> via_rhine 26632 0 - Live 0xf888b000
> mii 6400 1 via_rhine, Live 0xf884b000
> ehci_hcd 37900 0 - Live 0xf8880000
> usbcore 146028 5 usbhid,usblp,uhci_hcd,ehci_hcd, Live 0xf88f2000
> sata_via 12420 2 - Live 0xf8862000
> libata 159344 4 pata_acpi,pata_via,ata_generic,sata_via, Live 0xf88ca000
> scsi_mod 151436 4 sr_mod,sg,sd_mod,libata, Live 0xf88a4000
> thermal 16796 0 - Live 0xf885c000
> processor 36872 1 thermal, Live 0xf8869000
> fan 5636 0 - Live 0xf8844000
> fbcon 42912 0 - Live 0xf8850000
> tileblit 3456 1 fbcon, Live 0xf8833000
> font 9472 1 fbcon, Live 0xf882f000
> bitblit 6784 1 fbcon, Live 0xf8826000
> softcursor 3072 1 bitblit, Live 0xf8829000
> fuse 50708 19 - Live 0xf8836000
> mrc Ada:/proc$


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