On Wed, Dec 14, 2011 at 1:36 PM, Vincent Autefage <899...@bugs.launchpad.net> wrote: > I have checked differences between the GIT repository (V0.14.0) and the > Ubuntu version (V0.14.0) and generated patch diff file. > The patch contains about 5000 lines... > > What's the next step ?
Okay, so when you rebuild the Ubuntu package from source the bug is not present and the largish diff suggests they have added patches on top of vanilla 0.14.0. If the Ubuntu source ships with a number of .diff/.patch files that get applied during the build then you could manually bisect this. That means rerunning the Ubuntu build but with only the first half of the list of patches applied. If that has the bug then split the untested patches in half too and continue the test cycle. If the bug is not present then split the patches in half and continue testing until you reach the point where the bug goes from present to fixed. Stefan -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/899140 Title: Problem with Linux Kernel Traffic Control Status in QEMU: New Bug description: Hi, The last main versions of QEMU (0.14.1, 0.15 and 1.0) have an important problem when running on a Linux distribution which running itself a Traffic Control (TC) instance. Indeed, when TC is configured with a Token Bucket Filter (TBF) with a particular rate, the effective rate is very slower than the desired one. For instance, lets consider the following configuration : # tc qdisc add dev eth0 root tbf rate 20mbit burst 20k latency 50ms The effective rate will be about 100kbit/s ! (verified with iperf) I've encountered this problem on versions 0.14.1, 0.15 and 1.0 but not with the 0.14.0... In the 0.14.0, we have a rate of 19.2 mbit/s which is quiet normal. I've done the experimentation on several hosts : - Debian 32bit core i7, 4GB RAM - Debian 64bit core i7, 8GB RAM - 3 different high performance servers : Ubuntu 64 bits, 48 AMD Opteron, 128GB of RAM The problem is always the same... The problem is also seen with a Class Based Queuing (CBQ) in TC. Thanks To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/899140/+subscriptions
