EdenFS stats Counters and Duration

There are EdenFS stats all over eden layers. You can check the stats value with any of the following way:

• You can see the list of all the EdenFS counters and their current values by running

$ eden debug thrift getCounters --json

• You can limit the output of this command by using getRegexCounters

eden debug thrift getRegexCounters "^inodemap.*" --json

Also the following eden commands show some stats

• eden rage : divide them into EdenFS Counters and Thrift Counters
• eden stats : show some of the inodes dynamic counters
• eden top : show some live and pending dynamic counters for fuse and object requests

There are three set of stats in Eden:

1. Stats which are listed in EdenStats.h - Most common
2. Dynamic Counters that are registered with a callback. Usually in EdenServer.cpp
3. EdenFS exposed Sapling counters

Testing stats

There are some integration tests for the availability and the value of the stats. e.g.

• stats_test.py For some of EdenStats.h and dynamic counters
• filteredhg_test.py for FilteredFS Sapling counters
• Also, there is .t test for Sapling counters. e.g. test-remotefilelog-prefetch.t