Created attachment 284677 log of read_vmstat when filling RAM with new tabs in Chromium
(In reply to Michal Hocko from comment #8) > Created attachment 258067 [details] > read_vmstat.c > > On Tue 22-08-17 15:55:30, Andrew Morton wrote: > > > > (switched to email. Please respond via emailed reply-to-all, not via the > > bugzilla web interface). > > > > On Tue, 22 Aug 2017 11:17:08 +0000 bugzilla-dae...@bugzilla.kernel.org > wrote: > [...] > > Sadly I haven't been able to capture this information > > > fully yet due to said unresponsiveness. > > Please try to collect /proc/vmstat in the bacground and provide the > collected data. Something like > > while true > do > cp /proc/vmstat > vmstat.$(date +%s) > sleep 1s > done > > If the system turns out so busy that it won't be able to fork a process > or write the output (which you will see by checking timestamps of files > and looking for holes) then you can try the attached proggy > ./read_vmstat output_file timeout output_size > > Note you might need to increase the mlock rlimit to lock everything into > memory. I am facing the following issue on this [1] hardware: - when new tabs are openned in Chromium, swap (on SSD) is not used, 0K of swap is used. After about 2.5 GB out of total 4 GB RAM becomes used, about 15-50 MB of swap can be used, sometimes up to ~570 MB, but not more; - this leads to that Load Everage bumps from normal ~0.9 to 9-15 when loading a new tab in Chromium; - so the system in general freezes from time to time when working in the web browser and switching between tabs and/or openning new ones I have run your program read_vmstat (./read_vmstat vmstat.log 5s) and then ran a script that openned many tabs in Chromium, a new tab each 5s; after all tabs were openned, about ~3.5 GB of RAM became used, but only about 15 MB were swapped; then I ctrl+c'ed ./read_vmstat. Collected log is attached. Kernel was 4.15.0-58-generic in Ubuntu. [1] https://linux-hardware.org/?probe=414558f152 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1833281 Title: System freeze when memory is put on SWAP in Linux >4.10.x To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1833281/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
