3
65%
develop: 68%

Ran 06 Oct 2016 08:57AM UTC

Files 141

Run time 7s

Badge

Embed ▾

Committed 06 Oct 2016 08:42AM UTC coverage: 64.929% (+0.05%) from 64.884%

Job # TEST_SUITE=unit

Build Type

push

travis-ci

Committed by

tgamblin

Commit Message

Use a single lock file for stages and a single file for prefixes.

- Locks now use fcntl range locks on a single file.

How it works for prefixes:

- Each lock is a byte range lock on the nth byte of a file.

- The lock file is ``spack.installed_db.prefix_lock`` -- the DB tells us
  what to call it and it lives alongside the install DB.  n is the
  sys.maxsize-bit prefix of the DAG hash.

For stages, we take the sha1 of the stage name and use that to select a
byte to lock.

With 100 concurrent builds, the likelihood of a false lock collision is
~5.36e-16, so this scheme should retain more than sufficient paralellism
(with no chance of false negatives), and get us reader-writer lock
semantics with a single file, so no need to clean up lots of lock files.

Coverage Stats

7846 of 12084 relevant lines covered (64.93%)

0.65 hits per line

LLNL / spack / 4315 / 3
65%
develop: 68%

README BADGES
x

Markdown

Textile

RDoc

HTML

Rst

Source Files on job 4315.3 (TEST_SUITE=unit)

LLNL / spack / 4315 / 3 65% develop: 68%

README BADGES x

Markdown

Textile

RDoc

HTML

Rst

Source Files on job 4315.3 (TEST_SUITE=unit)

LLNL / spack / 4315 / 3
65%
develop: 68%

README BADGES
x