Re: [Qemu-devel] Hang with migration multi-thread compression under high load

2016-04-28 Thread Li, Liang Z
> On Wed, Apr 27, 2016 at 03:20:23PM +0100, Daniel P. Berrange wrote: > > I've been testing various features of migration and have hit a problem > > with the multi-thread compression. It works fine when I have 2 or more > > threads, but if I tell it to only use a single thread, then it almost > > a

Re: [Qemu-devel] Hang with migration multi-thread compression under high load

2016-04-28 Thread Li, Liang Z
> On Thu, Apr 28, 2016 at 03:27:39AM +, Li, Liang Z wrote: > > > I've been testing various features of migration and have hit a > > > problem with the multi-thread compression. It works fine when I have > > > 2 or more threads, but if I tell it to only use a single thread, > > > then it almost

Re: [Qemu-devel] Hang with migration multi-thread compression under high load

2016-04-28 Thread Daniel P. Berrange
On Wed, Apr 27, 2016 at 03:20:23PM +0100, Daniel P. Berrange wrote: > I've been testing various features of migration and have hit a problem > with the multi-thread compression. It works fine when I have 2 or more > threads, but if I tell it to only use a single thread, then it almost > always hang

Re: [Qemu-devel] Hang with migration multi-thread compression under high load

2016-04-28 Thread Daniel P. Berrange
On Thu, Apr 28, 2016 at 03:27:39AM +, Li, Liang Z wrote: > > I've been testing various features of migration and have hit a problem with > > the multi-thread compression. It works fine when I have 2 or more threads, > > but if I tell it to only use a single thread, then it almost always hangs >

Re: [Qemu-devel] Hang with migration multi-thread compression under high load

2016-04-27 Thread Li, Liang Z
> I've been testing various features of migration and have hit a problem with > the multi-thread compression. It works fine when I have 2 or more threads, > but if I tell it to only use a single thread, then it almost always hangs > > I'm doing a migration between 2 guests on the same machine over

Re: [Qemu-devel] Hang with migration multi-thread compression under high load

2016-04-27 Thread Li, Liang Z
> On Wed, Apr 27, 2016 at 03:29:30PM +0100, Dr. David Alan Gilbert wrote: > > ccing in Liang Li > > > > * Daniel P. Berrange (berra...@redhat.com) wrote: > > > for some reason it isn't shown in the stack thrace for thread > > > 1 above, when initially connecting GDB it says the main thread is > > >

Re: [Qemu-devel] Hang with migration multi-thread compression under high load

2016-04-27 Thread Daniel P. Berrange
On Wed, Apr 27, 2016 at 03:29:30PM +0100, Dr. David Alan Gilbert wrote: > ccing in Liang Li > > * Daniel P. Berrange (berra...@redhat.com) wrote: > > for some reason it isn't shown in the stack thrace for thread > > 1 above, when initially connecting GDB it says the main thread > > is at: > > > >

Re: [Qemu-devel] Hang with migration multi-thread compression under high load

2016-04-27 Thread Dr. David Alan Gilbert
ccing in Liang Li * Daniel P. Berrange (berra...@redhat.com) wrote: > I've been testing various features of migration and have hit a problem > with the multi-thread compression. It works fine when I have 2 or more > threads, but if I tell it to only use a single thread, then it almost > always han

[Qemu-devel] Hang with migration multi-thread compression under high load

2016-04-27 Thread Daniel P. Berrange
I've been testing various features of migration and have hit a problem with the multi-thread compression. It works fine when I have 2 or more threads, but if I tell it to only use a single thread, then it almost always hangs I'm doing a migration between 2 guests on the same machine over a tcp loc