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Unified Diff: tools/metrics/histograms/histograms.xml

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Issue 617263007: Add 4 Variations.SeedDateSkew.* histograms to analyze whether the system clock or the build time co… (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: review:asvitkine Created 6 years, 2 months ago
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Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index e225050bcaa860786c5c188d42f6de4ebb4f4f8f..9bc0e39dbb9cc2b3a53ef688b7c21b7a01b8ec83 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -36503,6 +36503,46 @@ Therefore, the affected-histogram name has to have at least one dot in it.
</summary>
</histogram>
+<histogram name="Variations.SeedDateSkew.BuildTimeAheadBy" units="days">
+ <owner>gab@chromium.org</owner>
+ <summary>
+ Logged on startup when creating field trials from the variations seed if the
+ build time is ahead of or within 24 hours of the kVariationsSeedDate. Used
+ as an experiment to see whether the build time could be used to discard very
+ old seeds.
+ </summary>
+</histogram>
+
+<histogram name="Variations.SeedDateSkew.BuildTimeBehindBy" units="days">
+ <owner>gab@chromium.org</owner>
+ <summary>
+ Logged on startup when creating field trials from the variations seed if the
+ build time is behind the kVariationsSeedDate by a day or more. Used as an
+ experiment to see whether the build time could be used to discard very old
+ seeds.
+ </summary>
+</histogram>
+
+<histogram name="Variations.SeedDateSkew.SystemClockAheadBy" units="days">
+ <owner>gab@chromium.org</owner>
+ <summary>
+ Logged on startup when creating field trials from the variations seed if the
+ system clock is ahead of or within 24 hours of the kVariationsSeedDate. Used
+ as an experiment to see whether the system clock could be used to discard
+ very old seeds.
+ </summary>
+</histogram>
+
+<histogram name="Variations.SeedDateSkew.SystemClockBehindBy" units="days">
+ <owner>gab@chromium.org</owner>
+ <summary>
+ Logged on startup when creating field trials from the variations seed if the
+ system clock is behind the kVariationsSeedDate by a day or more. Used as an
+ experiment to see whether the system clock could be used to discard very old
+ seeds.
+ </summary>
+</histogram>
+
<histogram name="Variations.SeedEmpty" enum="VariationsSeedEmpty">
<owner>asvitkine@chromium.org</owner>
<summary>
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