diff options
| -rw-r--r-- | net/disk_cache/backend_impl.cc | 34 |
1 files changed, 28 insertions, 6 deletions
diff --git a/net/disk_cache/backend_impl.cc b/net/disk_cache/backend_impl.cc index 900ea08..b03ecda 100644 --- a/net/disk_cache/backend_impl.cc +++ b/net/disk_cache/backend_impl.cc @@ -172,13 +172,35 @@ bool InitExperiment(disk_cache::IndexHeader* header, uint32 mask) { return false; } - // The current experiment is closed for new profiles. - if (header->experiment < disk_cache::EXPERIMENT_DELETED_LIST_OUT) - header->experiment = disk_cache::EXPERIMENT_DELETED_LIST_OUT; - - // If we are part of the experiment, set up the field trial. - if (header->experiment > disk_cache::EXPERIMENT_DELETED_LIST_OUT) + // See if we already defined the group for this profile. + if (header->experiment > disk_cache::EXPERIMENT_DELETED_LIST_OUT) { SetFieldTrialInfo(header->experiment); + return true; + } + + if (!header->create_time || !header->lru.filled) + return true; // Wait untill we fill up the cache. + + int index_load = header->num_entries * 100 / (mask + 1); + if (index_load > 25) { + // Out of the experiment (~18% users). + header->experiment = disk_cache::EXPERIMENT_DELETED_LIST_OUT2; + return true; + } + + int option = base::RandInt(0, 4); + if (option > 1) { + // 60% out (49% of the total). + header->experiment = disk_cache::EXPERIMENT_DELETED_LIST_OUT2; + } else if (!option) { + // About 16% of the total. + header->experiment = disk_cache::EXPERIMENT_DELETED_LIST_CONTROL; + } else { + // About 16% of the total. + header->experiment = disk_cache::EXPERIMENT_DELETED_LIST_IN; + } + + SetFieldTrialInfo(header->experiment); return true; } |