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Diffstat (limited to 'open_issues/time.mdwn')
| -rw-r--r-- | open_issues/time.mdwn | 69 |
1 files changed, 0 insertions, 69 deletions
diff --git a/open_issues/time.mdwn b/open_issues/time.mdwn deleted file mode 100644 index ab239aef..00000000 --- a/open_issues/time.mdwn +++ /dev/null @@ -1,69 +0,0 @@ -[[!meta copyright="Copyright © 2009, 2011 Free Software Foundation, Inc."]] - -[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable -id="license" text="Permission is granted to copy, distribute and/or modify this -document under the terms of the GNU Free Documentation License, Version 1.2 or -any later version published by the Free Software Foundation; with no Invariant -Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license -is included in the section entitled [[GNU Free Documentation -License|/fdl]]."]]"""]] - -[[!tag open_issue_porting]] - -Neither the `time` executable from the GNU time package work completely -correctly, nor does the GNU Bash built-in one. - - tschwinge@flubber:~ $ \time sleep 2 - 0.00user 0.00system 9:38:00elapsed 0%CPU (0avgtext+0avgdata 0maxresident)k - 0inputs+0outputs (0major+0minor)pagefaults 0swaps - tschwinge@flubber:~ $ \time sleep 4 - 0.00user 0.00system 18:50:25elapsed 0%CPU (0avgtext+0avgdata 0maxresident)k - 0inputs+0outputs (0major+0minor)pagefaults 0swaps - tschwinge@flubber:~ $ \time sleep 6 - 0.00user 0.00system 28:00:53elapsed 0%CPU (0avgtext+0avgdata 0maxresident)k - 0inputs+0outputs (0major+0minor)pagefaults 0swaps - tschwinge@flubber:~ $ time sleep 2 - - real 0m2.093s - user 0m0.000s - sys 0m0.011s - tschwinge@flubber:~ $ time sleep 4 - - real 0m4.083s - user 0m0.000s - sys 0m0.010s - tschwinge@flubber:~ $ time sleep 6 - - real 0m6.164s - user 0m0.000s - sys 0m0.010s - -GNU time's *elapsed* value is off by some factor. - - $ \time factor 1111111111111111111 - 1111111111111111111: 1111111111111111111 - 0.00user 0.00system 52:39:24elapsed 0%CPU (0avgtext+0avgdata 0maxresident)k - 0inputs+0outputs (0major+0minor)pagefaults 0swaps - $ time factor 1111111111111111111 - 1111111111111111111: 1111111111111111111 - - real 0m11.424s - user 0m0.000s - sys 0m0.010s - -As above; also here all the running time should be attriuted to *user* time. -This is probably a [[!taglink open_issue_gnumach]]. - - -# 2011-09-02 - -Might want to revisit this, and take Xen [[!tag open_issue_xen]] into account --- I believe flubber has already been Xenified at that time. - - -## IRC, freenode, #hurd, 2011-09-02 - -While testing some [[performance/IPC_virtual_copy]] performance issues: - - <tschwinge> And I can confirm that with dd if=/dev/zero of=/dev/null bs=4k - running, a parallel sleep 10 takes about 20 s (on strauss). |