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authorVadim Bendebury <vbendeb@chromium.org>2012-09-27 19:24:07 -0700
committerStefan Reinauer <stefan.reinauer@coreboot.org>2012-11-12 03:35:20 +0100
commit6d18fd09c380d6195999c69ffa29310c4429f4f1 (patch)
tree22d259765e6c6ade08810e4e6c141be5e1dbdd03 /.gitignore
parent043d4e1be1f72647d8f7cfa8d99736d7ed351c3b (diff)
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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>
Diffstat (limited to '.gitignore')
-rw-r--r--.gitignore2
1 files changed, 2 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore
index 9bd71085a..259dac916 100644
--- a/.gitignore
+++ b/.gitignore
@@ -47,6 +47,8 @@ util/crossgcc/xgcc/
util/*/.dependencies
util/*/.test
util/cbfstool/cbfstool
+util/cbmem/.dependencies
+util/cbmem/cbmem
util/dumpmmcr/dumpmmcr
util/ectool/ectool
util/getpir/getpir