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How do I set oomd to kill process instead of cgroup? #125

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minecraft2048 opened this issue Apr 12, 2020 · 2 comments
Closed

How do I set oomd to kill process instead of cgroup? #125

minecraft2048 opened this issue Apr 12, 2020 · 2 comments

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@minecraft2048
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I'm running oomd on ubuntu 19.10 with default configuration, except that I changed "user pressure above 60 for 30s", to

                        "name": "pressure_above",
                        "args": {
                            "cgroup": "user.slice",
                            "resource": "memory",
                            "threshold": "5",
                            "duration": "5"
                        }

so that I can trigger it more easily using stress, then when I trigger it, this happens:

Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/plugins/PressureAbove.cpp:132] 10s pressure 7.08 is over the threshold of 5 for 5 seconds , total usage is 7345MB
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/engine/Ruleset.cpp:97] DetectorGroup=user pressure above 60 for 30s has fired for Ruleset=user session protection. Running action chain.
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/engine/Ruleset.cpp:112] Running Action=kill_by_memory_size_or_growth
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/OomdContext.cpp:128] Dumping OomdContext:
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/OomdContext.cpp:150] name=user.slice/user-1000.slice/session-12.scope
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/OomdContext.cpp:151]   pressure=7.09:2.07:0.46-20.19:5.64:1.4
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/OomdContext.cpp:156]   mem=7295MB mem_avg=7123MB mem_low=0MB mem_min=0MB mem_high=8796093022207MB mem_high_tmp=0MB mem_max=8796093022207MB mem_prot=0MB anon=6804MB swap_usage=0MB
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/OomdContext.cpp:166]   io_cost_cumulative=0 io_cost_rate=0
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/OomdContext.cpp:150] name=system.slice/sddm.service
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/OomdContext.cpp:151]   pressure=1.67:0.53:0.18-6.09:1.87:0.67
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/OomdContext.cpp:156]   mem=25MB mem_avg=29MB mem_low=0MB mem_min=0MB mem_high=8796093022207MB mem_high_tmp=0MB mem_max=8796093022207MB mem_prot=0MB anon=6MB swap_usage=0MB
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/OomdContext.cpp:166]   io_cost_cumulative=0 io_cost_rate=0
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/OomdContext.cpp:150] name=system.slice/systemd-udevd.service
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/OomdContext.cpp:151]   pressure=0.39:0.11:0.02-1.88:0.57:0.19
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/OomdContext.cpp:156]   mem=12MB mem_avg=12MB mem_low=0MB mem_min=0MB mem_high=8796093022207MB mem_high_tmp=0MB mem_max=8796093022207MB mem_prot=0MB anon=0MB swap_usage=0MB
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/OomdContext.cpp:166]   io_cost_cumulative=0 io_cost_rate=0
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/OomdContext.cpp:150] name=system.slice/systemd-journald.service
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/OomdContext.cpp:151]   pressure=0.29:0.08:0.01-1.53:0.46:0.16
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/OomdContext.cpp:156]   mem=8MB mem_avg=8MB mem_low=0MB mem_min=0MB mem_high=8796093022207MB mem_high_tmp=0MB mem_max=8796093022207MB mem_prot=0MB anon=0MB swap_usage=0MB
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/OomdContext.cpp:166]   io_cost_cumulative=0 io_cost_rate=0
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/OomdContext.cpp:150] name=user.slice/user-1000.slice/user@1000.service/dbus.service
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/OomdContext.cpp:151]   pressure=0.39:0.11:0.02-1.54:0.45:0.15
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/OomdContext.cpp:156]   mem=7MB mem_avg=8MB mem_low=0MB mem_min=0MB mem_high=8796093022207MB mem_high_tmp=0MB mem_max=8796093022207MB mem_prot=0MB anon=0MB swap_usage=0MB
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/OomdContext.cpp:166]   io_cost_cumulative=0 io_cost_rate=0
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/OomdContext.cpp:150] name=system.slice/oomd.service
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/OomdContext.cpp:151]   pressure=1.23:0.33:0.07-3.17:0.82:0.18
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/OomdContext.cpp:156]   mem=5MB mem_avg=5MB mem_low=64MB mem_min=0MB mem_high=8796093022207MB mem_high_tmp=0MB mem_max=8796093022207MB mem_prot=0MB anon=0MB swap_usage=0MB
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/OomdContext.cpp:166]   io_cost_cumulative=0 io_cost_rate=0
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/OomdContext.cpp:150] name=system.slice/accounts-daemon.service
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/OomdContext.cpp:151]   pressure=0.64:0.17:0.04-1.15:0.33:0.1
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/OomdContext.cpp:156]   mem=2MB mem_avg=2MB mem_low=0MB mem_min=0MB mem_high=8796093022207MB mem_high_tmp=0MB mem_max=8796093022207MB mem_prot=0MB anon=0MB swap_usage=0MB
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/OomdContext.cpp:166]   io_cost_cumulative=0 io_cost_rate=0
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/OomdContext.cpp:150] name=system.slice/rsyslog.service
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/OomdContext.cpp:151]   pressure=0.29:0.08:0.01-1.38:0.38:0.08
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/OomdContext.cpp:156]   mem=1MB mem_avg=1MB mem_low=0MB mem_min=0MB mem_high=8796093022207MB mem_high_tmp=0MB mem_max=8796093022207MB mem_prot=0MB anon=0MB swap_usage=0MB
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/OomdContext.cpp:166]   io_cost_cumulative=0 io_cost_rate=0
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/plugins/KillMemoryGrowth-inl.h:163] Picked "user.slice/user-1000.slice/session-12.scope" (7295MB) based on size > 50% of total 7425MB
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/plugins/BaseKillPlugin.cpp:101] Trying to kill /sys/fs/cgroup/user.slice/user-1000.slice/session-12.scope
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/plugins/BaseKillPlugin.cpp:206] Set xattr trusted.oomd_kill_uuid=d7382f70a83ec2e3d923d63cd1a6b73e on /sys/fs/cgroup/user.slice/user-1000.slice/session-12.scope
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/plugins/BaseKillPlugin.cpp:184] Set xattr trusted.oomd_ooms=1 on /sys/fs/cgroup/user.slice/user-1000.slice/session-12.scope
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/plugins/BaseKillPlugin.cpp:147] Killed 20: 13468(sddm-helper) 13472(kwalletd5) 13473(startkde) 13521(ssh-agent) 13551(start_kdeinit) 13553(kdeinit5) 13554(klauncher) 13569(kded5) 13578(kaccess) 13601(kwrapper5) 13605(ksmserver) 13614(kwin_x11) 13619(baloo_file) 13621(krunner) 13624(plasmashell) 13630(polkit-k
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/plugins/BaseKillPlugin.cpp:147] Killed 20: 13666(okular) 13690(okular) 13693(firefox) 13782(at-spi-bus-laun) 13784(agent) 13790(dbus-daemon) 13798(org_kde_powerde) 13908(desktop.so) 13914(file.so) 13949(Web Content) 14006(Web Content) 14026(WebExtensions) 14048(file.so) 14105(plasma-browser-) 14112(Web Conten
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/plugins/BaseKillPlugin.cpp:147] Killed 8: 14395(Web Content) 14432(Web Content) 14551(Web Content) 14665(konsole) 14680(fish) 14737(stress) 14738(stress) 14766(journalctl)
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/plugins/BaseKillPlugin.cpp:197] Set xattr trusted.oomd_kill=48 on /sys/fs/cgroup/user.slice/user-1000.slice/session-12.scope
Apr 12 20:40:03 seireitei oomd[14628]: [../src/oomd/Log.cpp:113] 7.09 2.07 0.46 user.slice/user-1000.slice/session-12.scope 7650164736 ruleset:[user session protection] detectorgroup:[user pressure above 60 for 30s] killer:kill_by_memory_size_or_growth v2
Apr 12 20:40:33 seireitei oomd[14628]: [../src/oomd/engine/Ruleset.cpp:134] Action=kill_by_memory_size_or_growth returned STOP. Terminating action chain.

It kills everything in user cgroup, killing my desktop. Is there a way to set it up so it only kills the process with highest memory usage?
@hakavlad
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hakavlad commented Apr 12, 2020 •
edited

@minecraft2048 oomd kills only whole cgroup. It cannot kill separate process. If you looking for low memory handler for desktop computer that can work wih PSI look at https://github.com/hakavlad/nohang

@minecraft2048
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Looks like thats the thing that I need

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