diff options
| author | Thomas Schwinge <thomas@codesourcery.com> | 2012-05-24 23:08:09 +0200 |
|---|---|---|
| committer | Thomas Schwinge <thomas@codesourcery.com> | 2012-05-24 23:08:09 +0200 |
| commit | 2910b7c5b1d55bc304344b584a25ea571a9075fb (patch) | |
| tree | bfbfbc98d4c0e205d2726fa44170a16e8421855e /open_issues/performance/io_system/binutils_ld_64ksec.mdwn | |
| parent | 35b719f54c96778f571984065579625bc9f15bf5 (diff) | |
Prepare toolchain/logs/master branch.
Diffstat (limited to 'open_issues/performance/io_system/binutils_ld_64ksec.mdwn')
| -rw-r--r-- | open_issues/performance/io_system/binutils_ld_64ksec.mdwn | 39 |
1 files changed, 0 insertions, 39 deletions
diff --git a/open_issues/performance/io_system/binutils_ld_64ksec.mdwn b/open_issues/performance/io_system/binutils_ld_64ksec.mdwn deleted file mode 100644 index 931fd0ee..00000000 --- a/open_issues/performance/io_system/binutils_ld_64ksec.mdwn +++ /dev/null @@ -1,39 +0,0 @@ -[[!meta copyright="Copyright © 2010, 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_hurd]] - -This one may be considered as a testcase for [[I/O system -optimization|community/gsoc/project_ideas/disk_io_performance]]. - -It is taken from the [[binutils testsuite|binutils]], -`ld/ld-elf/sec64k.exp`, where this -test may occasionally [[trigger a timeout|binutils#64ksec]]. It is -extracted from cdf7c161ebd4a934c9e705d33f5247fd52975612 sources, 2010-10-24. - - $ wget -O - http://www.gnu.org/software/hurd/open_issues/performance/io_system/binutils_ld_64ksec/test.tar.xz | xz -d | tar -x - $ cd test/ - $ \time ./ld-new.stripped -o dump dump?.o dump??.o - 0.00user 0.00system 2:46.11elapsed 0%CPU (0avgtext+0avgdata 0maxresident)k - 0inputs+0outputs (0major+0minor)pagefaults 0swaps - -On the idle grubber, this one repeatedly takes a few minutes wall time to -complete successfully, contrary to a few seconds on a GNU/Linux system. - -While processing the object files, there is heavy interaction with the relevant -[[hurd/translator/ext2fs]] process. Running [[hurd/debugging/rpctrace]] on -the testee shows that (primarily) an ever-repeating series of `io_seek` and -`io_read` is being processed. Running the testee on GNU/Linux with strace -shows the equivalent thing (`_llseek`, `read`) -- but Linux' I/O system isn't -as slow as the Hurd's. - -As Samuel figured out later, this slowness may in fact be due to a Xen-specific -issue, see [[Xen_lseek]]. After the latter has been addressed, we can -re-evaluate this issue here. |