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uftrace: add support for UTC offset information #26

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MatthewKhouzam
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@MatthewKhouzam MatthewKhouzam commented May 10, 2024

This is a soon to be released feature in uftrace, allows correlation with lttng kernel traces.

This fixes all traces being from boot time and helps with correlation.
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Fixes namhyung/uftrace#1923

@honggyukim
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Hi @MatthewKhouzam, namhyung/uftrace#1923 is now on master so you can use it.

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Code looks good. Just some formatting issues. I'm not able to test it though.

@MatthewKhouzam MatthewKhouzam force-pushed the uftrace-utc branch 2 times, most recently from 5163224 to fe7bc9a Compare May 27, 2024 19:45
@honggyukim
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I didn't read the code carefully but please make sure to handle backward compatibiliy since the previous uftrace data doesn't have utc_offset field in its info.

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LGTM. Thanks!

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Incubator build is still broken. It needs the PR #28 to be merged first and then a rebase.

@MatthewKhouzam
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I didn't read the code carefully but please make sure to handle backward compatibiliy since the previous uftrace data doesn't have utc_offset field in its info.

I should have replied earlier.

It assumes UTC Offset is 0. If there is a field named UTC Offset and it is NOT "0" it tries to parse the number. If it succeeds in parsing, it assigns the offset to the non-zero value.

This is a soon to be released feature in uftrace, allows correlation with
lttng kernel traces.

Signed-off-by: Matthew Khouzam <matthew.khouzam@ericsson.com>
Change-Id: I76ee112ba5c407d7e4810df77882c9e11bfaa43d
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Simple rebase

@MatthewKhouzam MatthewKhouzam merged commit f230c18 into eclipse-tracecompass-incubator:master May 28, 2024
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@MatthewKhouzam MatthewKhouzam deleted the uftrace-utc branch May 28, 2024 15:29
@honggyukim
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I didn't read the code carefully but please make sure to handle backward compatibiliy since the previous uftrace data doesn't have utc_offset field in its info.

I should have replied earlier.

It assumes UTC Offset is 0. If there is a field named UTC Offset and it is NOT "0" it tries to parse the number. If it succeeds in parsing, it assigns the offset to the non-zero value.

Sounds good. Thanks your work!

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3 participants