This page is intended for recording steps we have taken over time to improve RAMCloud performance, along with measurements of the resulting performance gains. Add new entries at the beginning of the page, so that the entries are in reverse chronological order.
Merging the check for tablet existence with incrementing the read count on the tablet. (July 2014, Henry Qin)
Before this optimization, reading an object required first checking for existence of the tablet containing the Key, reading the Object, and then looking at the same tablet to increment the read count on it. It also involved copying a TabletManager::Tablet object onto the stack.
This optimization combines the two operations which require tablet lookup into a single operation, saving roughly 40 ns of time for the repeated look-up.
Prefetching on Incoming Packet and Log Entry (June 2014, Henry Qin)
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