Posts by ivan


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1) Message boards : Number crunching : SETI/BOINC Milestones [ v2.0 ] - XXVIII (Message 1627389)
Posted 15 days ago by Profile ivan
Phew! Made it to 150M at last. The last bit has been a bit of a slog, with the recent problems, failures in my machines, and trying to (mis)manage it all for a month from the other side of the world, but I made it in the end!
Oh, and I see my team has made it to 200M.
2) Message boards : Number crunching : Strange, utterly strange MB v7 run as MB v6 with MB v7 app.... (Message 1625886)
Posted 20 days ago by Profile ivan
Just check your folder for those tasks.
I have none left in my cache.


6 of them sitting in my invalids.

I've got 14 in invalids and another four in inconclusive.
This one has been out to eight hosts already.
3) Message boards : Number crunching : Panic Mode On (93) Server Problems? (Message 1620705)
Posted 30 Dec 2014 by Profile ivan
I badly needed some WUs here. Its -20C outside.

It's +30 C outside here [28.641° S, 153.608° E] -- at 2330 local! Meanwhile, back home in London it's -5 C. Supposed to be warmer (~7 C) when I get back Friday night. Hope the warmth from my three home servers has kept Jack Frost at bay -- at the moment they are all still running and reporting results.
4) Message boards : Number crunching : SSD and Bionic??? (Message 1619894)
Posted 28 Dec 2014 by Profile ivan
Ok Guys,

If things NEVER fail...why do they sell replacement parts??....hmm

Because one-in-a-million events happen nine times out of ten...
5) Message boards : Number crunching : No GPU Units Under Linux (Message 1619749)
Posted 28 Dec 2014 by Profile ivan
The only GPU app currently for Linux is Astropulse,..."


Is there a technical reason that prevents the development or porting of a GPU app for MB WUs under Linux, or is it a case of no one taking or having the time to do it?

Various of us have our own ports, but it's hard to make a "standard" version due to the large variability between different versions, distributions and libraries. Also, you really need to have a compatible version of BOINC and even that is hard to compile, especially if you want the graphical boincmgr (the standard distribution doesn't work on most of my Linux systems, due to its requiring specific libraries).
6) Message boards : Number crunching : Panic Mode On (93) Server Problems? (Message 1618852)
Posted 25 Dec 2014 by Profile ivan
Fun fact: the default Intel CPU fan for socket 1156 CPUs has no rubber plug underneath the sticker.

Probably the case for a lot of smaller computer fans these days.
The fans on my GTX 560Ti were the same- it was a case of carefully (and quite forcefully) levering the fan blade assembly out of the motor assembly.

+1
7) Message boards : Number crunching : Problem with BOINC right click (Message 1618711)
Posted 25 Dec 2014 by Profile ivan
Whenever I right click the BOINC taskbar icon it opens the notices tab instead of the menu so I can snooze BOINC. It happened after I upgraded from 6.10.60 to 7.2.42, did try running the installer to repair and it worked, but next time it opened the notice tab again. Installing 7.4.36 didn't help. Any ideas?

Have you tried double-(left-)clicking the icon?
8) Message boards : Number crunching : Panic Mode On (93) Server Problems? (Message 1618275)
Posted 24 Dec 2014 by Profile ivan
I had to take the thing apart a moment ago anyway, as the AMD HD6850 in it ran 52C at idle, a tad too much. So after cleaning that out and cleaning the CPU heat sink, I took my spray can of WD40, put the straw in, wrapped the CPU fan up in a paper towel and sprayed the tiniest bit of WD40 in the opening between the fan head and the spindle. Turned the fan a couple of times, repeated the oiling, then put the system together again.

Immediately upon starting up the difference was noticeable. The whole system starts up ultra quiet now. So thanks to you, unknown person, for telling on these forums that you would oil your fan(s) regularly as well. You made me a believer. :)

Just remember that WD40 is not a lubricant, it is a Water Displacer (not surprisingly, the 40th formulation the US Navy tested...). Don't rely on it for long-term service, though it usually works as a short-term solution. [When you're in an aged Mini, coming back from London, Ont., to catch a flight from Toronto back to Switzerland, in a streaming sleet-storm, you tend to be very glad that the service-station you limped into on less than three cylinders has WD40 for sale, to spray on your spark-plug caps, leads, and the distributor. DAMHIK,IJD-OK?]
9) Message boards : News : Marvin crashed (Message 1618271)
Posted 24 Dec 2014 by Profile ivan
It's easy

If it doesn't move and it should you need a hammer

If it does move and it shouldn't use duct tape

If non of the above then it's an electrical problem and you need an electrician

Merry Christmas to ALL

Ronald Reagan: If it ain't broke, don't fix it!
US Marine Corps Engineers: If we can't fix it, it ain't broke...
10) Message boards : Number crunching : How To Do A "Headless Linux CLI Multiple GPU Boinc Server" Semi-Pro Cruncher ;) (Message 1613238)
Posted 13 Dec 2014 by Profile ivan
I'm also interested.

Faster graphics cards would of course be better. I know nothing about rack cases. Do they make them taller so you could put full height cards in them?

Yeah, there are a number of different configurations. One of my Supermicros is only 1U high but it has a C1060 and a GTX460 (sans fan!) in it -- they lie flat so height isn't really an issue. Similarly with my latest 2U chassis -- it has two slide-in dual-Xeon systems, each of which can take a full-size PCI-e card; we have the same chasses in our Grid cluster with four smaller slide-in dual-Xeons, but they can only take low-profile cards (like the GT640 with appropriate hardware). One of the other groups in our Department tested an Intel system a while ago that could take eight (IIRC) PCI-e cards, standing up, but I don't remember the chassis size or whether they were full-height or low-profile slots.
11) Message boards : News : Database Rebuild Status update. (Message 1611451)
Posted 10 Dec 2014 by Profile ivan

WEATHER CANBERRA Daily forecast
Day Weather Maximum Day Temperature Minimum Night Temperature Wind Direction and Speed
Tuesday Sunny Interval 25°C 16°C East North Easterly 4mph
Wednesday Light Rain 27°C 18°C North Easterly 3mph
Sunrise 05:42 Sunset 20:10


Curious Ivan you have a pommy flag and you Quote the weather in Canberra ?

Working in our nations capital mate ?

Don't worry about the U.V summer has only just started mate , just wait till January !!

Just visiting, Australian Institute of Physics Congress (gwgl AIP2014). Then back home to Byron Bay for the rest of the month before returning to London (any local s@h-ers in BB feel welcome to contact me).
12) Message boards : News : Database Rebuild Status update. (Message 1610934)
Posted 8 Dec 2014 by Profile ivan
Ugh, these people have the luxury to only work when the sun is up? Bah!

When I'm at work at 8am this time of year at the Northern Hemisphere, there's not been a sun in my life yet! If it wasn't dreary as today, it usually is down as well when I go back home at 4.45pm. I'll have to wait till end-of-January to be able to see the sun still at the end of the day.

;-)


Sunrise Tuesday 9th : 9:45am, Sundown Tuesday 9th: 2:55pm. Length of the day: 5 h 10 min.

And I wonder why people think that us Finns are grumpy people ;)


Kingman, AZ
Sunrise: 07:31:57 Sunset: 17:22:52 Transit: 12:27:24 Length of daytime: 9h 50m 55s

WEATHER CANBERRA Daily forecast Day Weather Maximum Day Temperature Minimum Night Temperature Wind Direction and Speed Tuesday Sunny Interval 25°C 16°C East North Easterly 4mph Wednesday Light Rain 27°C 18°C North Easterly 3mph Sunrise 05:42 Sunset 20:10

So far I've not got too much UV...
13) Message boards : Number crunching : Panic Mode On (92) Server Problems? (Message 1606856)
Posted 29 Nov 2014 by Profile ivan
Down to one in-process job. Now have Einstein running on several of my "best" machines in the interim. I did have a problem with it on my work Win7 desktop -- a quad-core i7 (with hyper-threading) with 4 GB of RAM. It spawned eight tasks of 400 MB each, and sent the machine into swap territory! I eventually managed to regain enough control to be able to set local preferences to "use at most 50% memory" but it took a while! I'm away, imminently, for the next five weeks so I'm not overly concerned about interactive response for the nonce.
14) Message boards : News : Running out of workunits (Message 1606854)
Posted 29 Nov 2014 by Profile ivan
I'm going to blame the NSA, China and Russian's for the problems
November 5th I had a total system crash, damaged Windows and lost Linux Mint 17 including all the work units I had downloaded.
Everything had been running fine for months
I had to fit hard drive with a Linux Ubuntu 12.04LTS to get system running again. No chance of repairing Mint installation, may be able to repair Windows but OS now says I only have a single core processor instead of 4 core, BIOS still sees 4 core so that doesn't look damaged

Just a word of advice (ignore it if you already know...). On Linux, make the /home directory a separate partition. Then, if you have to change/upgrade the OS, your personal files remain intact (you have to do a manual disk allocation in the OS set-up of course). I used to also have a separate partition for /boot but when Ubuntu decided not to delete older versions of the kernel I got into awful trouble having to resize it manually (very manually) to get things working again. These days I usually have just three partitions -- /, /home, and swap. If it's a data-handling machine than a /data would also make sense. OTOH, there's the 11th commandment, Thou shalt make backups!
15) Message boards : Technical News : I was right... (Nov 24, 2014) (Message 1606321)
Posted 27 Nov 2014 by Profile ivan
Tuht mir leid wenn ich auf Deutsch Poste aber Mein English Reicht gerade für kleine Sätze aus und nicht für große also Translat this with Google Translator or Bing Thanks and Habby gobble Gobble Day from Germany now in German Wan wirds entlich fertig mit dem Umbau ?


Yep, he's right. This must be the worst ever Google translation from German to English:

Tuht'm sorry but if I My English to German wirds Poste enough, especially for small sets and not so great for Translat this with Google Translator or Bing Thanks and Gobble gobble Habby Day from Germany now in German Wan entlich finished remodeling?

Sheesh! Even I can do better, and I only lived in der Schweiz for 13 years:
"Sorry that I post in German but my English is only good enough for short sentences and not long ones -- so translate this with Google or Bing. Thanks, and Happy Thanksgiving from Deutschland. Jetz auf Deutsch; When will the rebuild finally be finished?"
Tja, niemand weiss. Wann es fertig ist!
16) Message boards : Technical News : What's happening... (Nov 8, 2014) (Message 1604124)
Posted 22 Nov 2014 by Profile ivan
Life is too short to drink cheap beer..........

Life is also too short to drink 11% wine! (California vintners, please note...)
17) Message boards : Number crunching : Panic Mode On (92) Server Problems? (Message 1603794)
Posted 21 Nov 2014 by Profile ivan
From the home page,

The science database server crashed a few hours ago. The project is down until the database recovery is complete.


Cheers.

Who woulda thunk to look there?

When I was a little kid, the general store in Byron Bay (back before self-service, you asked at the counter for what you wanted, and they fired your money and the bill on overhead wires up to the cashier above, who returned the little trolley with your change and receipt...) there was a sign on the counter, "When all else fails, raise this flap!" Should you actually raise the flap, you saw the message, "Not now, stupid, when all else fails!"
Given the reluctance of physicists to read the documentation, I've often thought of prefacing an instruction manual with, "When all else fails, read the instructions." With, of course, the obvious riposte on the first page...
[Edit] Oops, put that reply to the wrong post! [/Edit]
18) Message boards : Number crunching : Best performing hardware (Message 1602713)
Posted 19 Nov 2014 by Profile ivan
Then there's the memory problem -- our particular model only has 8 GB of ram, which has to contain the OS as well as applications. At the moment top reports 7.6 GB free, so for 60 cores x 4 threads that'd be only around 30 MB available per thread; currently on an Ubuntu box s@h reports 104 or 164 MB virtual memory per process, 40 or 96 MB resident per process, and 12 MB KB shared. (Similar figures on a RHEL box; the one job on Ubuntu that's taking more RAM is not the vlar WU running at the moment.)

If you are running stock apps, those are UPX compressed. Decompress them and see what figures you get then. Although, iirc, the apps use more than 30 MB for data.

Those are in-memory figures from top -- compression of the executable wouldn't affect that (only the space on disk), surely?
19) Message boards : Number crunching : Best performing hardware (Message 1602580)
Posted 19 Nov 2014 by Profile ivan
[quote]
Then there's the memory problem -- our particular model only has 8 GB of ram, which has to contain the OS as well as applications. At the moment top reports 7.6 GB free, so for 60 cores x 4 threads that'd be only around 30 MB available per thread; currently on an Ubuntu box s@h reports 104 or 164 MB virtual memory per process, 40 or 96 MB resident per process, and 12 MB KB shared. (Similar figures on a RHEL box; the one job on Ubuntu that's taking more RAM is not the vlar WU running at the moment.)
This might all change with the new Phis, which slot into motherboard sockets and can access main memory, but Intel hasn't offered me one to play with yet...

Would it be possible to use massively-parallel system via OpenCL drivers and not to run separate instance on each node/core ?

Perhaps, you have more experience there than I. I've done a few OpenMP things but not really had the chance to play with it otherwise. Do you have to explicitly parallelise everything in OpenCL or does the system work that out for you? (Guess I should dig out your code if I get an idle moment.)
Another possibility would be to try to get the shareable section much larger by using shared libraries:
[eesridr:~] > ldd BOINC/projects/setiathome.berkeley.edu/setiathome_7.01_x86_64-pc-linux-gnu not a dynamic executable
20) Message boards : Number crunching : HDD Questions For The Elite - [PROBLEM RETURNED] (Message 1602303)
Posted 18 Nov 2014 by Profile ivan
[I don't do media sharing, at least I don't think I am. ;) Nothing is hogging a lot of resources. I'm still leaning toward the controller getting wonky. The light is not showing any disk access. It is "burning bright" just as my power switch is, no winking, flickering or anything, just solid on.

Keep on BOINCing...! :)

It could just be the driver transistor/gate gone short-circuit and pulling the LED permanently on. I had something similar with one of my new Xeons lately, the front panel indicators showed that the RAID array was continually being rebuilt. After replacing the disks, and the motherboard, it finally went away when we wiggled the SAS disk cables, so we replaced them too. Should have traced it down from the schematics, but they don't seem to provide them these days -- it's just "keep replacing components until the problem goes away."


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