Commit Graph

53 Commits

Author SHA1 Message Date
Stefan Reinauer 1e0e55615f cbmem utility: support command line options
The tool could print much more useful information than
just time stamps, for example the cbmem console on systems
that don't have a kernel patched to support /sys/firmware/log.

Hence, add command line option parsing to make adding such
features easier in the future.

Change-Id: Ib2b2584970f8a4e4187da803fcc5a95469f23a6a
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/2091
Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
Tested-by: build bot (Jenkins)
2013-01-03 01:09:50 +01:00
Vadim Bendebury 7c6b6bb593 cbmem compilation needs to use the hardened toolchain
The appropriate compiler (provided by the build system) is used to
ensure proper toolchain options are used.

cbmem.c is being modified to suppress pointer to integer typecast
warnings.

Change-Id: Ibab2faacbd7bdfcf617ce9ea4296ebe7d7b64562
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: http://review.coreboot.org/1791
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2012-11-12 17:12:23 +01:00
Vadim Bendebury 6d18fd09c3 Utility to dump boot timing table
Coreboot and u-boot create a table of timestamps which allows to see
the boot process performance. The util/cbmem/cbmem.py script allows to
access the table after ChromeOS boots up and display its contents on
the console. The problem is that shipping images do not include Python
interpreter, so there is no way to access the table on a production
machine.

This change introduces a utility which is a Linux app displaying the
timestamp table. Conceivably the output of this utility might be
included in one of the ChromeOS :/system sections, so it was attempted
to write this procedure 'fail safe', namely reporting errors and not
continuing processing if something goes wrong.

Including of coreboot/src .h files will allow to keep the firmware
timestamp implementation and this utility in sync in the future.

Test:
    . build the utility (run 'make' while in chroot in  util/cbmem)
    . copy `cbmem' and 'cbmem.py' to the target
    . run both utilities (limiting cbmem.py output to 25 lines or so)
    . observe that the generated tables are identical (modulo rounding
      up of int division, resulting in 1 ns discrepancies in some
      cases)

      localhost var # ./cbmem
      18 entries total:

         1:62,080
         2:64,569 (2,489)
         3:82,520 (17,951)
         4:82,695 (174)
         8:84,384 (1,688)
         9:131,731 (47,347)
        10:131,821 (89)
        30:131,849 (27)
        40:132,618 (769)
        50:134,594 (1,975)
        60:134,729 (134)
        70:363,440 (228,710)
        75:363,453 (13)
        80:368,165 (4,711)
        90:370,018 (1,852)
        99:488,217 (118,199)
      1000:491,324 (3,107)
      1100:760,475 (269,150)

      localhost var # ./cbmem.py | head -25

      time base 4249800, total entries 18
      1:62,080
      2:64,569  (2,489)
      3:82,520  (17,951)
      4:82,695  (174)
      8:84,384  (1,688)
      9:131,731  (47,347)
      10:131,821  (89)
      30:131,849  (27)
      40:132,618  (769)
      50:134,594  (1,975)
      60:134,729  (134)
      70:363,440  (228,710)
      75:363,453  (13)
      80:368,165  (4,711)
      90:370,018  (1,852)
      99:488,217  (118,199)
      1000:491,324  (3,107)
      1100:760,475  (269,150)

Change-Id: I013e594d4afe323106d88e7938dd40b17760621c
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: http://review.coreboot.org/1759
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
2012-11-12 03:35:20 +01:00