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build_image: set verity_depth default to 3

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This is in preparation for moving to a level 0 count of 1.

Seems to give about 200ms boot speedup.

Before(verity_depth = 1):

  seconds_power_on_to_login                                       7.73
  seconds_power_on_to_login{1}                                    7.97
  seconds_power_on_to_login{2}                                    7.8
  seconds_power_on_to_login{3}                                    7.86
  seconds_power_on_to_login{4}                                    7.84
  seconds_power_on_to_login{5}                                    7.81
  seconds_power_on_to_login{6}                                    7.85
  seconds_power_on_to_login{7}                                    7.85
  seconds_power_on_to_login{8}                                    7.85
  seconds_power_on_to_login{9}                                    7.82

After(verity_depth = 3)

  seconds_power_on_to_login                                       7.57
  seconds_power_on_to_login{1}                                    7.89
  seconds_power_on_to_login{2}                                    7.54
  seconds_power_on_to_login{3}                                    7.56
  seconds_power_on_to_login{4}                                    7.53
  seconds_power_on_to_login{5}                                    7.56
  seconds_power_on_to_login{6}                                    7.79
  seconds_power_on_to_login{7}                                    7.58
  seconds_power_on_to_login{8}                                    7.56
  seconds_power_on_to_login{9}                                    7.62

BUG=chromium-os:9752
TEST=platform_BootPerfServer

Change-Id: I7f6e39ad2ed2c2e8ebc463860578c3f97b8295a2

R=wad@chromium.org,jrbarnette@chromium.org

Review URL: http://codereview.chromium.org/6759016
This commit is contained in:
Mandeep Singh Baines 2011-03-30 10:47:48 -07:00
parent 9cac2869c7
commit 63ca269c69
1 changed files with 2 additions and 2 deletions
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4
build_image
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@ -99,8 +99,8 @@ DEFINE_boolean enable_rootfs_verification ${FLAGS_TRUE} \
DEFINE_integer verity_error_behavior 3 \
"Kernel verified boot error behavior (0: I/O errors, 1: panic, 2: nothing, \
3: cros) Default: 3"
DEFINE_integer verity_depth 1 \
"Kernel verified boot hash tree depth. Default: 1"
DEFINE_integer verity_depth 3 \
"Kernel verified boot hash tree depth. Default: 3"
DEFINE_integer verity_max_ios -1 \
"Number of outstanding I/O operations dm-verity caps at. Default: -1"
DEFINE_string verity_algorithm "sha1" \