tree f5c1e30ac59e514fee320fe22f6ab819c97851fc
parent 4d9abd9392ab0697548bd9c4c7a25617886a8980
author Jerry Zhang <zhangjerry@google.com> 1521079402 -0700
committer Jerry Zhang <zhangjerry@google.com> 1522192699 -0700

Switch to a thread pool for aio operations

Creating a thread for each operation was
slightly wasteful. This also makes traces
easier to read.

Test: Transfer files, view traces
Bug: 76154677
Change-Id: I6028f113b9e5a84f01fb020a209a4dccadfdece4