tree afbea798a6661542cb7e9eba3a73723615978a33
parent 20642ae71aa93ec2658d09c92a1ffc3844f5a555
author Jeff Sharkey <jsharkey@android.com> 1438186461 -0700
committer Jeff Sharkey <jsharkey@android.com> 1438189391 -0700

Use random data for benchmark instead of zeros.

If we always write zeros, we're leaving a giant pile of known
plaintext at an almost deterministic location on newly formatted
volumes.  To avoid this, repeat a 64K chunk of random data.

Bug: 22816936
Change-Id: Iedc067a519bd676a93b9d74ea4f9f77c84c8461c