Thanks for the help. I'm going to close this per discussion above. I
may end up opening a new bug (as per c#8) on trusty in LXC vs trusty on
bare medal depending on the results of further testing.
** Changed in: lxc (Ubuntu)
Status: Confirmed = Invalid
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I would say that this points more likely to apache itself (or maybe some
plumbing user-space parts). With that setup both containers use the same
kernel and lxc parts. Only the user-space is from the given distro. I
would not think udev is having much impact as that only runs when
devices change
There definitely is a drop in performance from Ubuntu vs Debian
normally.. see Virtualbox results:
http://openbenchmarking.org/result/1405217-SO-1405214PL68
However, what can explain the drop in Ubuntu Trusty Native vs Ubuntu
Trusty on LXC?
Oh, btw, about the ping yesterday, I think I should
I assume that apache test is running against the local network
interface, so we can rule out the additional network layers you get for
lxc. Not sure here, Stéphane and Serge can probably come up with
details, but all processes running inside the container probably belong
to the same task group (as
I installed the jessie apache2 packages (locally built) on trusty, and
ran the benchmarks using first it and then with a (hand-built) trusty
apache package. The results are at
http://openbenchmarking.org/result/1405218-PL-TRUSTYHOS17 . The
difference there is within SE. It could still be
I'm not sure if PTS actually uses the system installed apache for it's
tests.
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https://bugs.launchpad.net/bugs/1321415
Title:
Big performance difference between debian
** Changed in: lxc (Ubuntu)
Importance: Undecided = Medium
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https://bugs.launchpad.net/bugs/1321415
Title:
Big performance difference between debian and ubuntu guest
My results in unprivileged containers on my own host:
http://openbenchmarking.org/result/1405216-PL-HETZNERUN74
http://openbenchmarking.org/result/1405216-PL-HETZNERUN44
** Changed in: lxc (Ubuntu)
Status: New = Confirmed
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Note that while I marked it confirmed, I don't see this as a bug in lxc.
Since we get the same results on bare metal, I would expect it to be the
case in containers as well, barring drastic differences in kernel
configurations.
I do wonder how much of this could be due to toolchain hardening
Quoting Bryan Quigley (gqu...@gmail.com):
I'm not sure if PTS actually uses the system installed apache for it's
tests.
Indeed looking more closely at the install logs suggests it builds its
own. You can find it in the jessie install under
I wonder if we copy all of .phoronix-test-suite from one container to
the other and run it, what the results will look like.
Indeed, that's the best way to confirm this. I'll give that a try.
Thanks!
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Copying failed on missing/different libs.. I'm going to try to recreate
the tests using the ab command/locally installed apache.
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https://bugs.launchpad.net/bugs/1321415
Basically it looks like Debian in LXC might be faster looping back to
itself, but once you do the test even from the host machine, they even
out. Also results from Ubuntu apache installed on Debian Jessie.
I'm going to check to see where the other tests were run from.
Summary Results:
Very small performance loss when installing udev on debian
(http://openbenchmarking.org/result/1405208-PL-1405209PL62). May not be
significant.
My attempt to remove udev from Ubuntu did not succeed...
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