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Posts by cuphi

1) Message boards : Number crunching : Weird issue with "Ghost work units" on one host (Message 2257)
Posted 15 Feb 2024 by Profile cuphi
Post:
this is an issue with BOINC RPC protocol
if certain packets get lost in transit, the server has sent the tasks to the client and records that fact, the client never got them so they don't show up, and the protocol issue is that there is no acknowledgement to cope with the data loss
i believe there is a server option to resend lost tasks, but that it has been known to be awkward, so it isn't widely used
the "workaround" is just to wait until the server expires them and resends the tasks



This sounds plausible. Remote Procedure Calls (RPC) often use User Datagram Protocol (UPD) which which broadcasts packets and doesn't care if they get to where they should go. It's a well know tradeoff in the IP portion of TCP/IP.
2) Message boards : Number crunching : ARM/ARM64 (Raspberry Pi) support (Message 1887)
Posted 20 Aug 2022 by Profile cuphi
Post:
...We have uploaded a new version for ARM forcing the static link to try to solve the issue. Could you check the new app? Especially the ones with problems. Thank you...
Jesús.


Thank *you* Jesús! My Odroid-N2+ is working on four DENIS tasks now.
3) Message boards : Number crunching : ARM/ARM64 (Raspberry Pi) support (Message 1871)
Posted 18 Aug 2022 by Profile cuphi
Post:
Well, maybe Jesus can tell us what's missing for sure. I am running Einstein@home WU's with no problems right now.
4) Message boards : Number crunching : ARM/ARM64 (Raspberry Pi) support (Message 1869)
Posted 18 Aug 2022 by Profile cuphi
Post:
I tested it now on Odroid-N2+, Odroid-M1, Odroid-C2 and Odroid-C4 running with Ubuntu 20.04.1 LTS/20.04.4 LTS.
All work fine.

On all my ARMs i have added some lib to work on all Boincprojects:

sudo apt install libsfstdc++6
sudo apt install libstdc++6


Maybe this help.


It turns out that libstdc++6 is already installed and that the libsfstdc++6 doesn't apply to my platform. It's for armhf and I running aarch64.
5) Message boards : Number crunching : ARM/ARM64 (Raspberry Pi) support (Message 1867)
Posted 18 Aug 2022 by Profile cuphi
Post:
I just tried an switching to Armbian's Jammy release (https://www.armbian.com/) and have the same error message. It seems that DENIS doesn't like Ubuntu based distros on this board.
6) Message boards : Number crunching : ARM/ARM64 (Raspberry Pi) support (Message 1866)
Posted 18 Aug 2022 by Profile cuphi
Post:
all the wu's go wrong
<core_client_version>7.16.16</core_client_version>
<![CDATA[
<message>
process exited with code 2 (0x2, -254)</message>
<stderr_txt>
Process creation (../../projects/denis.usj.es_denisathome/DENIS_Myocyte_Beta_0.18_aarch64-unknown-linux-gnu) failed: Error -1, errno=2
execv: No such file or directory

</stderr_txt>
]]>



All WU's are failing on my Odroid-N2+ with this same message.

Link to computer: https://denis.usj.es/denisathome/show_host_detail.php?hostid=215972

root@aarch64-chunk:~# uname -a
Linux aarch64-chunk 4.9.312-125 #1 SMP PREEMPT Sat Jun 18 18:58:41 UTC 2022 aarch64 aarch64 aarch64 GNU/Linux
root@aarch64-chunk:~# lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 20.04.4 LTS
Release:	20.04
Codename:	focal
root@aarch64-chunk:~# boinc --version
7.16.6 aarch64-unknown-linux-gnu
7) Message boards : Cafe : Why DENIS? (Message 1858)
Posted 16 Aug 2022 by Profile cuphi
Post:
I know people donate CPU time to distributed computing projects for a wide variety of reasons. So I making this thread so that we can all share our reasons for paying electricity bills and hardware purchases just to donate to this project.

Years ago, my mother died of a heart attack and the doctors couldn't tell us what caused it. It was "out of the blue and into the black." I couldn't accept the lack of answers and started digging deeper. I learned that for over 50% of all women their first heart attack is fatal. No one could say why. There are still many ideas but not any proof because very few studies in cartiological science are based on gender. At least not the big ones.

I am donating my money and CPU time to DENIS because it is looking for reasons at cellular level and therefor should save as many women as men.
8) Message boards : Number crunching : Myocyte beta 0.18 (Message 1857)
Posted 16 Aug 2022 by Profile cuphi
Post:
From my perspective things are looking great. I am less than 12 hours away from completing 7 consecutive days of work and have not had a single task error out. That is 7237 valid tasks and 480 tasks pending validation at the time I am writing this.
9) Message boards : Number crunching : Myocyte beta 0.18 (Message 1845)
Posted 9 Aug 2022 by Profile cuphi
Post:
Hello World.

I am new to the project and just finished my first batch of WU's. I see this at the end of log file for each WU:

05:14:49 (8752): called boinc_finish(0)
profiling:/denis-myocyte:Cannot create directory
profiling:/denis-myocyte/cmake-linux-64/models/CMakeFiles/models_lib.dir/models.cpp.gcda:Skip
profiling:/denis-myocyte:Cannot create directory
profiling:/denis-myocyte/cmake-linux-64/models/CMakeFiles/models_lib.dir/Model.cpp.gcda:Skip
profiling:/denis-myocyte:Cannot create directory
profiling:/denis-myocyte/cmake-linux-64/denis-myocyte-lib/CMakeFiles/denis_myocyte_lib.dir/tinyxml2.cpp.gcda:Skip
profiling:/denis-myocyte:Cannot create directory
profiling:/denis-myocyte/cmake-linux-64/denis-myocyte-lib/CMakeFiles/denis_myocyte_lib.dir/solvers/RK4Solver.cpp.gcda:Skip
profiling:/denis-myocyte:Cannot create directory
profiling:/denis-myocyte/cmake-linux-64/denis-myocyte-lib/CMakeFiles/denis_myocyte_lib.dir/solvers/RK2Solver.cpp.gcda:Skip
profiling:/denis-myocyte:Cannot create directory
profiling:/denis-myocyte/cmake-linux-64/denis-myocyte-lib/CMakeFiles/denis_myocyte_lib.dir/solvers/ForwardEulerSolver.cpp.gcda:Skip
profiling:/denis-myocyte:Cannot create directory
profiling:/denis-myocyte/cmake-linux-64/denis-myocyte-lib/CMakeFiles/denis_myocyte_lib.dir/solvers/Solver.cpp.gcda:Skip
profiling:/denis-myocyte:Cannot create directory
profiling:/denis-myocyte/cmake-linux-64/denis-myocyte-lib/CMakeFiles/denis_myocyte_lib.dir/Simulation.cpp.gcda:Skip
profiling:/denis-myocyte:Cannot create directory
profiling:/denis-myocyte/cmake-linux-64/denis-myocyte-lib/CMakeFiles/denis_myocyte_lib.dir/Postprocessing.cpp.gcda:Skip
profiling:/denis-myocyte:Cannot create directory
profiling:/denis-myocyte/cmake-linux-64/denis-myocyte-lib/CMakeFiles/denis_myocyte_lib.dir/Output.cpp.gcda:Skip
profiling:/denis-myocyte:Cannot create directory
profiling:/denis-myocyte/cmake-linux-64/denis-myocyte-lib/CMakeFiles/denis_myocyte_lib.dir/DenisConfig.cpp.gcda:Skip
profiling:/denis-myocyte:Cannot create directory
profiling:/denis-myocyte/cmake-linux-64/denis-myocyte-lib/CMakeFiles/denis_myocyte_lib.dir/BoincConnection.cpp.gcda:Skip
profiling:/denis-myocyte:Cannot create directory
profiling:/denis-myocyte/cmake-linux-64/CMakeFiles/denis_myocyte.dir/denis_myocyte.cpp.gcda:Skip


My computer: https://denis.usj.es/denisathome/show_host_detail.php?hostid=215671