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Make sending large eBPF events more memory efficient #73

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MatteoNardi opened this issue Oct 10, 2022 · 1 comment · Fixed by #119
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Make sending large eBPF events more memory efficient #73

MatteoNardi opened this issue Oct 10, 2022 · 1 comment · Fixed by #119
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@MatteoNardi
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MatteoNardi commented Oct 10, 2022 •
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When sending events from eBPF programs to userspace, we always allocate the max length of bytes the given field supports. For example, in file-system-monitor, we send filenames of NAME_MAX length (1024) even when it's much shorter. Moreover, this leads us to being excessively conservative with the maximum field lengths.

We should design a data structure/protocol which allows to send only the data actually needed.
@MatteoNardi MatteoNardi added the enhancement New feature or request label Oct 10, 2022
@MatteoNardi MatteoNardi mentioned this issue Oct 10, 2022
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Once this if fixed, we increase the following constants:

  • file-system-monitor. The maximum file paths should be 4096
  • process-monitor. The maximum path of binaries should be 4096
  • process-monitor. Ideally, the maximum arguments size should be 2097152

MatteoNardi added a commit that referenced this issue Oct 11, 2022
@MatteoNardi
misc(process-monitor): improve warning message
73fabdf 
This also makes sure so send as much data as possibile when the argument
list is too long.

Ref #73
@MatteoNardi MatteoNardi mentioned this issue Oct 11, 2022
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MatteoNardi added a commit that referenced this issue Oct 11, 2022
@MatteoNardi
misc(process-monitor): improve warning message
bd40931 
This also makes sure so send as much data as possibile when the argument
list is too long.

Ref #73
@MatteoNardi MatteoNardi self-assigned this Nov 30, 2022
@MatteoNardi MatteoNardi linked a pull request Dec 2, 2022 that will close this issue
Make sending large eBPF events more memory efficient #119
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@MatteoNardi MatteoNardi mentioned this issue Dec 2, 2022
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enhancement New feature or request
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Pulsar
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Make sending large eBPF events more memory efficient exein-io/pulsar
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