Re: [Qemu-devel] Migration speed throttling, max_throttle in migration.c

2011-02-09 Thread Yoshiaki Tamura
2011/2/10 Thomas Treutner : > Am 09.02.2011 21:02, schrieb Anthony Liguori: >> >> The reason it's still this today is mainly historic. I've thought about >> making the default limit unlimited. I'm not sure if anyone has strong >> opinions. > > Personally, I'd appreciate that. TCP's congestion contr

Re: [Qemu-devel] Migration speed throttling, max_throttle in migration.c

2011-02-09 Thread Thomas Treutner
Am 09.02.2011 21:02, schrieb Anthony Liguori: The reason it's still this today is mainly historic. I've thought about making the default limit unlimited. I'm not sure if anyone has strong opinions. Personally, I'd appreciate that. TCP's congestion control when using 100MBit Ethernet seems to w

Re: [Qemu-devel] Migration speed throttling, max_throttle in migration.c

2011-02-09 Thread Anthony Liguori
On 02/09/2011 07:13 PM, Thomas Treutner wrote: Hi, I was reading qemu's (qemu-kvm-0.13.0's, to be specific) live migration code to unterstand how the iterative dirty page transfer is implemented. During this I noticed that ram_save_live in arch_init.c is called quite often, more often than I

[Qemu-devel] Migration speed throttling, max_throttle in migration.c

2011-02-09 Thread Thomas Treutner
Hi, I was reading qemu's (qemu-kvm-0.13.0's, to be specific) live migration code to unterstand how the iterative dirty page transfer is implemented. During this I noticed that ram_save_live in arch_init.c is called quite often, more often than I expected (approx. 200 times for an idle 500MiB