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  Thread: No more Linux WUs ?

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No more Linux WUs ?
Hi,

I've moved one crunching machine to a minimalist Linux environment (Debian Etch, minimal install) to get less CPU overhead, and installed the boinc client from apt-get.
I'm using a shared partition between Windows and Linux, hosting the BOINC projet.

The BOINC client starts fine (boinc --dir /mnt/data/boinc &), no error in the logs, but it just won't download any WU :
$:BOINC\] 12-Jun-2012 14:24:26 [World Community Grid] update requested by user
12-Jun-2012 14:24:29 [World Community Grid] Sending scheduler request: Requested by user.
12-Jun-2012 14:24:29 [World Community Grid] Requesting new tasks
12-Jun-2012 14:24:33 [World Community Grid] Scheduler request completed: got 0 new tasks
The updates then get deferred for 2h, and any manual update gets 0 task.

The machine is remote controlled through RPC binding and ssh.
As I said, there is no error message in the logs.

Any help with this?

Thanks!
[Jun 12, 2012 12:32:34 PM]   Link   Report threatening or abusive post: please login first  Go to top 
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Re: No more Linux WUs ?
If there were no Linux CEP2 you'd have seen a current flamy thread on the forums and there is not ;>)

Have you set the override of 2 or more CEP2 tasks allowed, as that is needed if the BOINC average measured DL bandwidth has slipped too much, but that's puzzling as that would give a BW message.

edit: As is customary [here], plz give us the full messages from start up of client. Then we can asses the rest of your minimalist settings.

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[Edit 1 times, last edit by Former Member at Jun 12, 2012 12:45:34 PM]
[Jun 12, 2012 12:43:19 PM]   Link   Report threatening or abusive post: please login first  Go to top 
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Re: No more Linux WUs ?
Thank you SekeRob for your fast answer.

Here is the full message :

$:BOINC\] boinc --dir ./
12-Jun-2012 15:02:39 [---] Starting BOINC client version 6.10.58 for i686-pc-linux-gnu
12-Jun-2012 15:02:39 [---] Config: report completed tasks immediately
12-Jun-2012 15:02:39 [---] Config: GUI RPC allowed from any host
12-Jun-2012 15:02:39 [---] Config: GUI RPC allowed from:
12-Jun-2012 15:02:39 [---] Config: 192.168.0.5
12-Jun-2012 15:02:39 [---] Config: 192.168.0.1
12-Jun-2012 15:02:39 [---] log flags: file_xfer, sched_ops, task
12-Jun-2012 15:02:39 [---] Libraries: libcurl/7.21.0 OpenSSL/0.9.8o zlib/1.2.3.4 libidn/1.15 libssh2/1.2.6
12-Jun-2012 15:02:39 [---] Data directory: /mnt/docs/BOINC
12-Jun-2012 15:02:39 [---] Processor: 2 GenuineIntel Genuine Intel(R) CPU T2300 @ 1.66GHz [Family 6 Model 14 Stepping 8]
12-Jun-2012 15:02:39 [---] Processor: 2.00 MB cache
12-Jun-2012 15:02:39 [---] Processor features: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon bts aperfmperf pni monitor est tm2 xtpr pdcm dts
12-Jun-2012 15:02:39 [---] OS: Linux: 2.6.38-bpo.2-686
12-Jun-2012 15:02:39 [---] Memory: 2.96 GB physical, 66.41 MB virtual
12-Jun-2012 15:02:39 [---] Disk: 80.06 GB total, 38.52 GB free
12-Jun-2012 15:02:39 [---] Local time is UTC +0 hours
12-Jun-2012 15:02:39 [---] No usable GPUs found
12-Jun-2012 15:02:39 [World Community Grid] URL http://www.worldcommunitygrid.org/; Computer ID 2018876; resource share 100
12-Jun-2012 15:02:39 [World Community Grid] General prefs: from World Community Grid (last modified 14-May-2012 22:26:02)
12-Jun-2012 15:02:39 [World Community Grid] Host location: none
12-Jun-2012 15:02:39 [World Community Grid] General prefs: using your defaults
12-Jun-2012 15:02:39 [---] Reading preferences override file
12-Jun-2012 15:02:39 [---] Preferences:
12-Jun-2012 15:02:39 [---] max memory usage when active: 1516.51MB
12-Jun-2012 15:02:39 [---] max memory usage when idle: 2729.71MB
12-Jun-2012 15:02:39 [---] max disk usage: 10.00GB
12-Jun-2012 15:02:39 [---] don't use GPU while active
12-Jun-2012 15:02:39 [---] (to change preferences, visit the web site of an attached project, or select Preferences in the Manager)
12-Jun-2012 15:02:39 [---] Not using a proxy
Initialization completed
12-Jun-2012 15:02:39 [---] Suspending computation - initial delay
12-Jun-2012 15:13:45 [World Community Grid] Sending scheduler request: To fetch work.
12-Jun-2012 15:13:45 [World Community Grid] Requesting new tasks
12-Jun-2012 15:13:48 [World Community Grid] Scheduler request completed: got 0 new tasks

Notes:
- The initial delay is HUGE
- That's an old laptop which WCG saved from gathering dust.
The CPU isn't a fire breathing monster but it completes every WU up to checkpoint 14 or 15.
- I have set my account for 2 simultaneous WUs (one on each physical core)
- OS is a Debian Etch with an official backported Debian kernel + libc.

The very same machine crunches fine on Windows.
[Jun 12, 2012 1:23:14 PM]   Link   Report threatening or abusive post: please login first  Go to top 
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Re: No more Linux WUs ?
A note of warning on Linux versus Windows: Latter is substantially more efficient [for CEP2], so even if you gain a percent of cycles by a minimalist Linux, the net throughput on Windows is greater. Getting 99%+ on my W7-64 8 core if left alone. Never seen my Linux get better than 96-97%. Standard issue device.

Edit: And, we need no guesshing, the setup tells the story. VM needs 2GB, though Linux tends not to use it... tries to max out RAM utilization.

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[Edit 1 times, last edit by Former Member at Jun 12, 2012 1:50:49 PM]
[Jun 12, 2012 1:48:23 PM]   Link   Report threatening or abusive post: please login first  Go to top 
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Re: No more Linux WUs ?
Very insightful message, SekeRob.
I guess the science code must be the same on both platforms, so if efficiency is better on Windows, it must come from the toolchain and compiler (msvc vs gcc/llvm).
Maybe the CEP team could try compiling the linux client with ICC instead of GCC?

So, moving back to Windows in the meantime. Hopefully this efficiency issue will be sorted out.

Thanks!
[Jun 12, 2012 2:06:10 PM]   Link   Report threatening or abusive post: please login first  Go to top 
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Re: No more Linux WUs ?
@SekeRob: Thanks for sorting this out. There really should be a Community Advisor Appreciation Day ;).
@Theor: Thanks for your suggestion - alas the compiler choice lies with the IBM WCG team.
Best wishes
Your Harvard CEP team
[Jun 13, 2012 4:08:54 PM]   Link   Report threatening or abusive post: please login first  Go to top 
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Re: No more Linux WUs ?
Some insight from the Apple Developers Conference: The dead end for Mac-OS is clearly near...
http://xkcd.com/1056/
[Jun 13, 2012 5:40:40 PM]   Link   Report threatening or abusive post: please login first  Go to top 
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