diff options
Diffstat (limited to 'timings/JTimer/SConstruct')
| -rw-r--r-- | timings/JTimer/SConstruct | 21 |
1 files changed, 3 insertions, 18 deletions
diff --git a/timings/JTimer/SConstruct b/timings/JTimer/SConstruct index e1e38d20..95764a63 100644 --- a/timings/JTimer/SConstruct +++ b/timings/JTimer/SConstruct @@ -21,33 +21,18 @@ # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. # -""" -This configuration is for timing how we evaluate long chains of -dependencies, specifically when -j is used. - -We set up a chain of 100 targets that get built from a Python function -action with no source files (equivalent to "echo junk > $TARGET"). -Each target explicitly depends on the next target in turn, so the -Taskmaster will do a deep walk of the dependency graph. - -This test case was contributed by Kevin Massey. Prior to revision 1468, -we had a serious O(N^2) problem in the Taskmaster when handling long -dependency chains like this. That was fixed by adding reference counts -to the Taskmaster so it could be smarter about not re-evaluating Nodes. -""" - -target_cnt = 100 +target_count = int(ARGUMENTS['TARGET_COUNT']) env = Environment() def write_file( env, target, source ): - path_target = env.File( target ).path + path_target = env.File( target )[0].path outfile = open( path_target, 'w' ) outfile.write( 'junk' ) outfile.close() list = [] -for i in range( target_cnt ): +for i in range( target_count ): target = 'target_%03d' % i env.Command( target, [], write_file ) env.Depends( target, list ) |