fix(trace): use microseconds for chrome trace timestamps#13911
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Alizter merged 4 commits intoocaml:mainfrom Mar 25, 2026
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fix(trace): use microseconds for chrome trace timestamps#13911Alizter merged 4 commits intoocaml:mainfrom
Alizter merged 4 commits intoocaml:mainfrom
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Chrome Trace Event Format requires timestamps in microseconds, but json_of_event was emitting seconds (regression from c01c7d1). Convert from nanoseconds using integer division (to_ns / 1000) for both ts and dur fields in chrome mode. Signed-off-by: Ali Caglayan <alizter@gmail.com>
rgrinberg
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Signed-off-by: Ali Caglayan <alizter@gmail.com>
Signed-off-by: Ali Caglayan <alizter@gmail.com>
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Thanks. A CHANGES entry would be appropriate as well.
Signed-off-by: Ali Caglayan <alizter@gmail.com>
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CHANGES: ### Fixed - Restore compatibility with Windows 7 (ocaml/dune#13905, @nojb) - `dune test` now runs tests in the default context only. When there is a single context, it is treated as the default. This fixes a crash when the workspace has no context named "default". (ocaml/dune#13930, fixes ocaml/dune#13904, @Alizter) - Fix `dune trace cat --chrome-trace` to adhere to the Chrome Trace Event Format by providing timestamps and durations at microsecond granularity (ocaml/dune#13911, fixes ocaml/dune#13906, @Alizter)
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Chrome Trace Event Format requires timestamps in microseconds, but
json_of_eventwas emitting seconds. We therefore now convert for both thetsanddurfields in chrome trace mode.dune trace cat --chrome-tracehas wrong timing units #13906