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Unexpected with -M #111

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hakavlad opened this issue Feb 6, 2019 · 5 comments
Closed

Unexpected with -M #111

hakavlad opened this issue Feb 6, 2019 · 5 comments

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@hakavlad
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hakavlad commented Feb 6, 2019 •
edited by rfjakob 

sudo earlyoom -M 1
// I expect 1 KiB threshold
earlyoom v1.2-19-ga48e825
mem total: 13855 MiB, swap total:    0 MiB
Sending SIGTERM when mem <=  0 % and swap <= 10 %,
        SIGKILL when mem <=  0 % and swap <=  5 %
mem avail: 12488 of 13855 MiB (90 %), swap free:    0 of    0 MiB ( 0 %)
mem avail: 12480 of 13855 MiB (90 %), swap free:    0 of    0 MiB ( 0 %)
mem avail: 12481 of 13855 MiB (90 %), swap free:    0 of    0 MiB ( 0 %)
mem avail: 12480 of 13855 MiB (90 %), swap free:    0 of    0 MiB ( 0 %)
mem avail: 12480 of 13855 MiB (90 %), swap free:    0 of    0 MiB ( 0 %)
mem avail: 12481 of 13855 MiB (90 %), swap free:    0 of    0 MiB ( 0 %)
mem avail: 12481 of 13855 MiB (90 %), swap free:    0 of    0 MiB ( 0 %)
mem avail: 12480 of 13855 MiB (90 %), swap free:    0 of    0 MiB ( 0 %)
...
mem avail:  390 of 13855 MiB ( 2 %), swap free:    0 of    0 MiB ( 0 %)
mem avail:  307 of 13855 MiB ( 2 %), swap free:    0 of    0 MiB ( 0 %)
mem avail:  224 of 13855 MiB ( 1 %), swap free:    0 of    0 MiB ( 0 %)
mem avail:  141 of 13855 MiB ( 1 %), swap free:    0 of    0 MiB ( 0 %)
Low memory! At or below SIGKILL limits (mem: 0 %, swap: 5 %)
mem avail:  **132 of 13855 MiB ( 0 %)**, swap free:    0 of    0 MiB ( 0 %)
Killing process 'python3' with signal 9, pid: 3543, badness: 890, VmRSS: 12313 MiB
mem avail: 12471 of 13855 MiB (90 %), swap free:    0 of    0 MiB ( 0 %)
mem avail: 12465 of 13855 MiB (89 %), swap free:    0 of    0 MiB ( 0 %)
mem avail: 12465 of 13855 MiB (89 %), swap free:    0 of    0 MiB ( 0 %)
  • 132 MiB is 1%
  • 132 MiB is not 1 KiB (it was set via -M 1)

I expect termination at 1 KiB, not killing at 132 MiB.
@rfjakob
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rfjakob commented Feb 6, 2019

Well, all the thresholds have percent granularity, which is why you cannot have 1kib.

@hakavlad
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hakavlad commented Feb 6, 2019 •
edited by rfjakob

Can I set 1% for SIGTERM?

sudo earlyoom -m 1 -d
earlyoom v1.2-19-ga48e825
mem total: 13855 MiB, swap total:    0 MiB
Sending SIGTERM when mem <=  1 % and swap <= 10 %,
        SIGKILL when mem <=  0 % and swap <=  5 %
pid   383: badness   0 vm_rss   2372 systemd-udevd
    ^ new victim (higher vm_rss)
pid   774: badness   0 vm_rss    548 systemd-timesyn
pid   790: badness   0 vm_rss    956 iio-sensor-prox
...
adaptive sleep time: 100 ms
adaptive sleep time: 100 ms
mem avail:  279 of 13855 MiB ( 2 %), swap free:    0 of    0 MiB ( 0 %)
adaptive sleep time: 100 ms
adaptive sleep time: 100 ms
Low Memory! At or below SIGTERM limits (mem: 1 %, swap: 10 %)
mem avail:  **275** of 13855 MiB ( 1 %), swap free:    0 of    0 MiB ( 0 %)
pid   383: badness   0 vm_rss   2372 systemd-udevd
    ^ new victim (higher vm_rss)
pid   774: badness   0 vm_rss    548 systemd-timesyn
pid   790: badness   0 vm_rss    956 iio-sensor-prox
pid   791: badness   0 vm_rss    952 smartd
pid   793: badness   0 vm_rss   1648 ModemManager
pid   795: badness   0 vm_rss    404 avahi-daemon

mem avail: 275 of 13855 MiB ( 1 %)

275 is 2%, not 1%.

@hakavlad
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hakavlad commented Feb 6, 2019

Well, all the thresholds have percent granularity, which is why you cannot have 1kib.

Seems like I can not set -m less than 1% or 2%. This should be documented.

@hakavlad
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hakavlad commented Feb 27, 2019 •
edited

you cannot have 1kib

I cannot have even 100 MiB. Also, I expected SIGTERM, but earlyoom sends SIGKILL.

$ earlyoom -r 0.001 -M 102400
earlyoom v1.2-34-g2391f96
mem total: 13855 MiB, swap total:    0 MiB
Sending SIGTERM when mem <=  0 % and swap <= 10 %,
        SIGKILL when mem <=  0 % and swap <=  5 %
Could not lock memory - continuing anyway: Cannot allocate memory
mem avail: 10212 of 13855 MiB (73 %), swap free:    0 of    0 MiB ( 0 %)
mem avail: 10211 of 13855 MiB (73 %), swap free:    0 of    0 MiB ( 0 %)
...
mem avail:  148 of 13855 MiB ( 1 %), swap free:    0 of    0 MiB ( 0 %)
mem avail:  140 of 13855 MiB ( 1 %), swap free:    0 of    0 MiB ( 0 %)
Low memory! At or below SIGKILL limits (mem: 0 %, swap: 5 %)
mem avail:  131 of 13855 MiB ( 0 %), swap free:    0 of    0 MiB ( 0 %)
Killing process 'python3' with signal 9, pid: 7981, badness: 725, VmRSS: 10031 MiB
mem avail: 2589 of 13855 MiB (18 %), swap free:    0 of    0 MiB ( 0 %)
mem avail: 10175 of 13855 MiB (73 %), swap free:    0 of    0 MiB ( 0 %)

@yangfl yangfl mentioned this issue Mar 12, 2020
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@rfjakob
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rfjakob commented Mar 15, 2020

Fixed now. Granularity is virtually unlimited by using double floating point numbers.

@rfjakob rfjakob closed this as completed Mar 15, 2020
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Save absolute memory limit alongside with percent
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@rfjakob @hakavlad