1)
Message boards :
Number crunching :
Issues Controlling Number of Threads Used
(Message 42144)
Posted 12 Apr 2020 by RueiKe Post: Thanks @computezrmle and @Gunde for the helpful feedback. I was expecting a waiting for memory error on the 2990WX systems and assumed they were not attempting to run more than 16 threads for some other reason. It make sense that it limits the amount of threads based on memory. I wonder of the cost of memory has come down.. I will get a quote. For the Intel system, I had fixed the virtualization setting in BIOS at the time of my post. The system had been running on LHC for a while, so I wrongly assumed it was already enabled. Once I enabled, I observed no issues. Not sure why I saw one of the 1950X systems running more threads than the system has. Well actually the sum of the MT allocation for the Atlas tasks plus the other tasks was greater than number of threads, but maybe actually used was lower. When in this state, it would sporadically stop tasks and indicate it was waiting for memory. Seems ok now Perhaps an app_config.xml is needed here. I did have an VM become corrupt on the Epyc system. Not sure why, but perhaps an upgrade to virtualbox is needed. What is the best version people are using on Ubuntu?3 Seems like it is tricky to make sure systems don't download CMS. I thought I had it so all of my systems would only download Atlas and Sixtrack, but one system is still downloading Theory. One more question, if I set MT to 4 CPUs, will it select cores based on NUMA nodes? |
2)
Message boards :
Number crunching :
Issues Controlling Number of Threads Used
(Message 42140)
Posted 12 Apr 2020 by RueiKe Post: I am having trouble controlling the number of task running on my machines. In the past, I only had LHC download a limited number of tasks and run whenever available. So I had not experienced problems in the past few years. Now I am ramping up LHC on all of my systems as the primary project. My experience with loading has varied by system types: 1) Intel 10core 20 thread, running windows and latest client loads as the options->computing-preferences-usage_limits specifies. No issues 2) Two Threadripper 1950Xs (32 threads) in Windows, seems to max out loading (> number of threads available), ignoring options->computing-preferences-usage_limits. These are running 17.4.2 boincmgr. 3) Two Threadripper 2990WXs (32 threads) in Linux, only run 16 threads each, no matter what I set options->computing-preferences-usage_limits to. I am using TBar's 7.8.3 build of boincmgr from previous SETI work. 4) A 7702p on Linux seems to follow options->computing-preferences-usage_limits. It is also running TBar's build, same as my other 2 Linux systems.
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3)
Message boards :
Number crunching :
Notices: Needs More Disk Space
(Message 42112)
Posted 9 Apr 2020 by RueiKe Post: You may set a value for "Use no more than...". Just set to 250GB and will monitor... |
4)
Message boards :
Number crunching :
Notices: Needs More Disk Space
(Message 42110)
Posted 9 Apr 2020 by RueiKe Post: I should probably add that this is a 64core 7702P Rome CPU with 256GB of memory, 1TB ssd for home partition and 250GB ssd for system: Filesystem 1K-blocks Used Available Use% Mounted on udev 131950444 0 131950444 0% /dev tmpfs 26401552 2200 26399352 1% /run /dev/nvme0n1p2 238798492 16285752 210312704 8% / tmpfs 132007740 494736 131513004 1% /dev/shm tmpfs 5120 4 5116 1% /run/lock tmpfs 132007740 0 132007740 0% /sys/fs/cgroup /dev/nvme0n1p1 523248 6152 517096 2% /boot/efi /dev/nvme1n1 960381672 235680796 675846364 26% /home tmpfs 26401548 48 26401500 1% /run/user/1000 |
5)
Message boards :
Number crunching :
Notices: Needs More Disk Space
(Message 42109)
Posted 9 Apr 2020 by RueiKe Post: Looks more like a BOINC client message. boincmgr indicates 644 GB free and available to BOINC In computing preferences: Use no more than ___ is unchecked Leave at least 0.1GB free is checked Use no more than 90% of total is checked. |
6)
Message boards :
Number crunching :
Notices: Needs More Disk Space
(Message 42107)
Posted 9 Apr 2020 by RueiKe Post: On one of my systems, I get the following messages: LHC@home: Notice from server SixTrack needs 190.73MB more disk space. You currently have 0.00 MB available and it needs 190.73 MB. Thu 09 Apr 2020 07:16:09 PM CST LHC@home: Notice from server ATLAS Simulation needs 9536.74MB more disk space. You currently have 0.00 MB available and it needs 9536.74 MB. Thu 09 Apr 2020 07:16:09 PM CST LHC@home: Notice from server Theory Simulation needs 7629.39MB more disk space. You currently have 0.00 MB available and it needs 7629.39 MB. Thu 09 Apr 2020 07:16:09 PM CST I have plenty of empty disk space, but noticed many /dev/loop devices that appear to be full. Is the low disk space message due to low space in a VM? If so, can I configure the VM to be larger? |
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