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1a1da38248
Summary: # Intercept manifest.revision(..). The cache is checked, and if it's not there, resume the normal path. Once the normal path is complete, write to the cache. # Intercept manifest._addrevision(..). This may be used in bulk operations, such as pull. Since we don't want to flood the cache with a lot of entries we may not care about, we record all the nodes that are added. We add an atexit hook to then record the last N nodes to the cache. # Writes to the cache are done to a temp file, then atomically renamed into place. # On reads, we run the checkhash function. This costs us ~100ms per manifest in fbsource, but ensures a corrupt cache doesn't break us. Love to debate this matter. # On each batch of writes, we spawn a background copy of ourselves to prune the cache. We use the mtime of a marker file to determine the last time the prune happened. We calculate the odds that we should be doing the prune using a couple constants and the time since the last prune. If another prune happened recently, the dominant factor is a small probability that we run the prune, regardless of the interval. If no prune has happened recently, the dominant factor is the seconds-since-prune configuration variable. Some performance numbers (all averaged across 10 runs) * diff between two revs: 2.29s without caching; 1.75s with caching * rebasing 4 diffs: 12.1s without caching; 10.7s with caching Test Plan: passed the rudimentary correctness unit tests. with fbsource, ran a small handful of commands without anybody tripping and falling. Reviewers: rmcelroy, ericsumner, mpm, pyd, durham Reviewed By: durham Subscribers: akushner, mitrandir, cdelahousse Differential Revision: https://phabricator.fb.com/D2564490 Signature: t1:2564490:1449075868:70974c62e6bff6521b6f500b5bff3a260ddd6c6d |
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| .. | ||
| conduithttp.py | ||
| copytrace.sh | ||
| dummyssh | ||
| histedit-helpers.sh | ||
| killdaemons.py | ||
| printenv.py | ||
| run-tests.py | ||
| test-automv.t | ||
| test-bundle2.t | ||
| test-catnotate.t | ||
| test-commitextras.t | ||
| test-copytrace.t | ||
| test-dirsync.t | ||
| test-fbamend.t | ||
| test-fbconduit.t | ||
| test-fbhistedit-exec-obsolete.t | ||
| test-fbhistedit-exec.t | ||
| test-fbhistedit-stop-obsolete.t | ||
| test-fbhistedit-stop.t | ||
| test-filldb.t | ||
| test-git-getmeta.t | ||
| test-githelp.t | ||
| test-gitlikebookmarks.t | ||
| test-inhibitwarn.t | ||
| test-manifestdiskcache.t | ||
| test-mergedriver.t | ||
| test-morestatus.t | ||
| test-perftweaks.t | ||
| test-phabdiff.t | ||
| test-pushrebase-protection.t | ||
| test-pushrebase-remotenames.t | ||
| test-pushrebase.t | ||
| test-pushvars-remotenames.t | ||
| test-pushvars.t | ||
| test-reflog-remotenames.t | ||
| test-reflog.t | ||
| test-reset-remotenames.t | ||
| test-reset.t | ||
| test-simplecache.t | ||
| test-smartlog-remotenames.t | ||
| test-smartlog.t | ||
| test-sparse-extensions.t | ||
| test-sparse-merges.t | ||
| test-sparse-profiles.t | ||
| test-sparse.t | ||
| test-tweakdefaults-ordering.t | ||
| test-tweakdefaults-remotenames.t | ||
| test-tweakdefaults.t | ||
| test-writecg2.t | ||