[lustre-devel] Cannot find documentation or comment blocks specifically defining lnet metrics

[lustre-devel] Cannot find documentation or comment blocks specifically defining lnet metrics

[Jeff Johnson]

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Greetings all...

I'm modifying a Lustre metrics reporting tool and incorporating lnet
metrics into the data gathered. I dug through all the documentation I could
find and looked through source for comment blocks and didn't find anything
definitive. I'm hoping someone here could clarify. While some metrics are
obvious (*_drop) others I would rather not develop to based on assumptions.

msgs_alloc
msgs_max
rst_alloc
send_count
recv_count
route_count
drop_count
send_length
recv_length
route_length
drop_length

If someone can point me to the document that clearly defines the above I'd
appreciate it, so far I can't find any. As I said I don't want to develop
based on assumptions.

For example, when sampled over a short period of time does...

((X_length / X_count) / # samples) = avg rpc size of X type?

Send, Recv, Route and Drop are fairly clear. Length and Count I am assuming
are just that, n bytes and IOs. msgs_alloc, msgs_max, rst_alloc are less
obvious.

Thanks!

--Jeff

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Re: [lustre-devel] Cannot find documentation or comment blocks specifically defining lnet metrics

[Andreas Dilger via lustre-devel]

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Did you try wiki.whamcloud.com<http://wiki.whamcloud.com>?  Amir used to like creating pages for LNet there, so there might be something.

Otherwise, I can't really help with the LNet questions.

On Jan 22, 2024, at 12:35, Jeff Johnson <jeff.johnson@aeoncomputing.com<mailto:jeff.johnson@aeoncomputing.com>> wrote:

Greetings all...

I'm modifying a Lustre metrics reporting tool and incorporating lnet metrics into the data gathered. I dug through all the documentation I could find and looked through source for comment blocks and didn't find anything definitive. I'm hoping someone here could clarify. While some metrics are obvious (*_drop) others I would rather not develop to based on assumptions.

msgs_alloc
msgs_max
rst_alloc
send_count
recv_count
route_count
drop_count
send_length
recv_length
route_length
drop_length

If someone can point me to the document that clearly defines the above I'd appreciate it, so far I can't find any. As I said I don't want to develop based on assumptions.

For example, when sampled over a short period of time does...

((X_length / X_count) / # samples) = avg rpc size of X type?

Send, Recv, Route and Drop are fairly clear. Length and Count I am assuming are just that, n bytes and IOs. msgs_alloc, msgs_max, rst_alloc are less obvious.

Thanks!

--Jeff

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Cheers, Andreas
--
Andreas Dilger
Lustre Principal Architect
Whamcloud








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Re: [lustre-devel] Cannot find documentation or comment blocks specifically defining lnet metrics

[Jeff Johnson]

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Thanks! I dug around there before and didn’t find the info. I’ll look
again. If anyone else on the list can opine, please do.

—Jeff

On Mon, Jan 22, 2024 at 12:39 Andreas Dilger <adilger@whamcloud.com> wrote:

> Did you try wiki.whamcloud.com?  Amir used to like creating pages for
> LNet there, so there might be something.
>

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