LHC@home

A lot of very short tasks at the moment. Some of them take less than 10 seconds, mostly less than 30 seconds. They do get validated and get credit.
[edit] Here's one: https://lhcathome.cern.ch/lhcathome/result.php?resultid=428268819

Getting the same, mine are running 20-40 seconds. Probably some extreme settings that kill all particles very quickly.

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"“Life is short. Live passionately.” & “Enjoy the ride.”
- The last received messages from the particles that crashed into the wall within this one

https://lhcathome.cern.ch/lhcathome/result.php?resultid=428280183

"“Life is short. Live passionately.” & “Enjoy the ride.”
- The last received messages from the particles that crashed into the wall within this one

https://lhcathome.cern.ch/lhcathome/result.php?resultid=428280183

Hahaha, 1 second, jeeze. My fastest one is 10.03.

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A faster one had finished while I was writing. There's no CPU time but in the valid tasks list it was visible: Run time 2.01s , CPU time 0.72s. :D

https://lhcathome.cern.ch/lhcathome/result.php?resultid=428285638

I had a few hundred of those less than 10 second ones but just got a Run time 1 hours 23 min 16 sec and dozens more that look like they will run close to 90 minutes and more (93 credits)
(If you were here in the early days 2004 until we started VB you remember we had all of the Sixtracks running for a few seconds and around 1 credit each)

I’ll also be presenting the project at the upcoming HL-LHC collaboration meeting, where I’m sure we’ll attract even more colleagues eager to run exciting simulations with your help, all for the advancement of accelerator physics :D

This is the presentation (and it's VERY interesting!!)

This is the presentation (and it's VERY interesting!!)

Thanks for sharing!


In other news: getting decent credits/CPU time (even on Windows) with the latest batch that was released a few hours ago.

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Greetings!
Please let me know how/when you were able to download xtrack WU?

I have been trying for days with no luck.

Thanks in advance,
Jay

I got the first ones at 14:39 UTC. Didn't do anything, one of the laptops picked them up by chance. Then the others followed. Been running Einstein/Asteroids with 0 resource share while waiting for new tasks here.

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I have been trying for days with no luck.

Hi !
Have you enabled "Run test applications" in the Project settings ?
What does Boinc Event Log say when you force a project update ?

Thank you for your response!
--edit-- The 'test' was the trick!! I just downloaded 7 WU. YAY!
-- end edit--
I had not checked "test" . I just changed project preferences and enabled 'test'

my Boinc Logs says:

Sun 12 Oct 2025 07:17:06 PM EDT | LHC@home | Scheduler request completed: got 0 new tasks
Sun 12 Oct 2025 07:17:06 PM EDT | LHC@home | No tasks sent
Sun 12 Oct 2025 07:17:06 PM EDT | LHC@home | No tasks are available for XTrack
Sun 12 Oct 2025 07:17:06 PM EDT | LHC@home | Tasks for AMD/ATI GPU are available, but your preferences are set to not accept them

i wrote a shell script to update LHC every 4 to 6 minutes. Will keep you posted on the outcome.

A question for you:
are you using a 'standard' BOINC -LHC install?

FYI, I am running

Sun 12 Oct 2025 05:33:10 PM EDT |  | Starting BOINC client version 7.24.1 for x86_64-pc-linux-gnu
Sun 12 Oct 2025 05:33:10 PM EDT |  | log flags: file_xfer, sched_ops, task
Sun 12 Oct 2025 05:33:10 PM EDT |  | Libraries: libcurl/8.5.0 OpenSSL/3.0.13 zlib/1.3 brotli/1.1.0 zstd/1.5.5 libidn2/2.3.7 libpsl/0.21.2 (+libidn2/2.3.7) libssh/0.10.6/openssl/zlib nghttp2/1.59.0 librtmp/2.3 OpenLDAP/2.6.7
Sun 12 Oct 2025 05:33:10 PM EDT |  | Data directory: /var/lib/boinc-client
Sun 12 Oct 2025 05:33:11 PM EDT |  | No usable GPUs found
Sun 12 Oct 2025 05:33:11 PM EDT |  | libc:  version 2.39
Sun 12 Oct 2025 05:33:11 PM EDT |  | Host name: pc-17
Sun 12 Oct 2025 05:33:11 PM EDT |  | Processor: 8 GenuineIntel Intel(R) Core(TM) i7-8665U CPU @ 1.90GHz [Family 6 Model 142 Stepping 12]
Sun 12 Oct 2025 05:33:11 PM EDT |  | Processor features: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb ssbd ibrs ibpb stibp ibrs_enhanced tpr_shadow flexpriority ept vpid ept_ad fsgsbase tsc_adjust sgx bmi1 avx2 smep bmi2 erms invpcid mpx rdseed adx smap clflushopt intel_pt xsaveopt xsavec xgetbv1 xsaves dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp vnmi md_clear flush_l1d arch_capabilities
Sun 12 Oct 2025 05:33:11 PM EDT |  | OS: Linux Linuxmint: Linux Mint 22.2 [6.14.0-33-generic|libc 2.39]
Sun 12 Oct 2025 05:33:11 PM EDT |  | Memory: 31.00 GB physical, 19.53 GB virtual
Sun 12 Oct 2025 05:33:11 PM EDT |  | Disk: 191.19 GB total, 179.66 GB free
Sun 12 Oct 2025 05:33:11 PM EDT |  | Local time is UTC -4 hours
Sun 12 Oct 2025 05:33:11 PM EDT |  | VirtualBox version: 7.0.16_Ubuntur162802

T H A N K S !!
Jay

I got quite a few tasks, with work request for keeping the pc full for one day.

The predicted time for the running of the work units of _232 and _234 was about 0:40 hours, but it seems like they all end up going for 3-4 hours. I also got _239 and _240, but haven't started on those yet.

So it looks like I actually have work for 4 days, hopefully I can finish all the task before the deadline, but I might have to cancel a few.

Had 4 Linux tasks failed with BOINC exit code 132.
Most recent was task 428532961
Tasks name: camontan__oct_scan_end_of_collapse_round_scan_478__ScanShort_26_5__AcEdbO4MEh2R_0

Stderr output
<core_client_version>8.2.5</core_client_version>
<![CDATA[
<message>
process got signal 4</message>
<stderr_txt>

</stderr_txt>
]]>

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I have a 8 threads linux host that says

10096 LHC@home 13 oct. 2025, 19:43:05 This computer has reached a limit on tasks in progress

Why this ? there are only a modest 127 tasks validated since yesterday on it (only 1 error with 0 sec calculation).

I have another 4 threads linux host that has much more tasks without problem (currently 148 in cache), which does not seem crazy to me.

Bugged WU, might be interesting to find out what's wrong with it.

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Bugged WU, might be interesting to find out what's wrong with it.

Just the switch from 0.41 to 0.5. Same issue as this post

https://lhcathome.cern.ch/lhcathome/forum_thread.php?id=6378&postid=52500

Oh, right, forgot that there might be old 0.41 tasks lingering... Sorry.

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I roughly got like 700 WUs downloaded for Xtrack. But I think my computer can finish all this work before Sunday this week.

so next time.. Cache 0.01 day .. With this unstable setting of times .. Its like that . ALWAYS

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I have a 8 threads linux host that says

10096 LHC@home 13 oct. 2025, 19:43:05 This computer has reached a limit on tasks in progress

Why this ? there are only a modest 127 tasks validated since yesterday on it (only 1 error with 0 sec calculation).

I have another 4 threads linux host that has much more tasks without problem (currently 148 in cache), which does not seem crazy to me.

I'm still receiving tasks, but only 1 by 1, when 1 terminates, there is no cache available.

I didn't change anything on that host, at start I had some reasonable cache (not hundreds, and that was fine), but now I can't.

As long as I still get some tasks, it doesn't make much difference (except time to send back / get a new one I guess), but still this is very strange.