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store file access logging percentage as a denominator

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Reviewed By: chadaustin

Differential Revision: D29475156

fbshipit-source-id: efe207f1a4a09d4a718b9392294dbb7e91a2b98f
This commit is contained in:
Genevieve Helsel 2021-06-30 14:56:26 -07:00 committed by Facebook GitHub Bot
parent cf3c02b1f0
commit c6f74709b9
1 changed files with 7 additions and 5 deletions
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12
eden/fs/config/EdenConfig.h
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@ -615,13 +615,15 @@ class EdenConfig : private ConfigSettingManager {
this};
/**
* A number from 0 - 100 to determine how often we should log file access
* A number from 0 - x to determine how often we should log file access
* events. This is currectly agnostic to the type of file access. If this
* is not at 100, we will not log filenames and we will only log directory
* paths
* is not at 100%, we will not log filenames and we will only log directory
* paths. In the following equation, 1/x = percentage, x is this variable.
* For 50% rollout, 1/x = .5, so x = 2, so this would be set to 2. 0
* indicates that the feature is off.
*/
ConfigSetting<uint32_t> logFileAccessesPercentage{
"prefetch-profiles:file-access-logging-percentage",
ConfigSetting<uint32_t> logFileAccessesSamplingDenominator{
"prefetch-profiles:file-access-logging-sampling-denominator",
0,
this};