[Qemu-devel] [PATCH 06/22] ehci: Speed up the timer of raising int from the async schedule

2012-10-24 Thread Hans de Goede
Often the guest will queue up new packets in response to a packet, in the async schedule with its IOC flag set, completing. By speeding up the frame-timer, we notice these new packets earlier. This increases the speed (MB/s) of a Linux guest reading from a USB mass storage device by a factor of 1.1

Re: [Qemu-devel] [PATCH 06/22] ehci: Speed up the timer of raising int from the async schedule

2012-10-17 Thread Gerd Hoffmann
Hi, > 1) It causes migration issues when migrating to / from an old version With -1 yes, shifting the scale shoudn't be a that big issue though as it is just a optimization. > 2) We don't want to change the wakeup rate when the interrupt flag gets set > as pending, but when it actually gets co

Re: [Qemu-devel] [PATCH 06/22] ehci: Speed up the timer of raising int from the async schedule

2012-10-17 Thread Hans de Goede
Hi, On 10/17/2012 01:01 PM, Gerd Hoffmann wrote: On 10/15/12 15:00, Hans de Goede wrote: Hi, On 10/15/2012 01:17 PM, Gerd Hoffmann wrote: On 10/15/12 12:38, Hans de Goede wrote: Often the guest will queue up new packets in response to a packet, in the async schedule with its IOC flag set, co

Re: [Qemu-devel] [PATCH 06/22] ehci: Speed up the timer of raising int from the async schedule

2012-10-17 Thread Gerd Hoffmann
On 10/15/12 15:00, Hans de Goede wrote: > Hi, > > On 10/15/2012 01:17 PM, Gerd Hoffmann wrote: >> On 10/15/12 12:38, Hans de Goede wrote: >>> Often the guest will queue up new packets in response to a packet, in >>> the >>> async schedule with its IOC flag set, completing. By speeding up the >>> f

Re: [Qemu-devel] [PATCH 06/22] ehci: Speed up the timer of raising int from the async schedule

2012-10-15 Thread Hans de Goede
Hi, On 10/15/2012 01:17 PM, Gerd Hoffmann wrote: On 10/15/12 12:38, Hans de Goede wrote: Often the guest will queue up new packets in response to a packet, in the async schedule with its IOC flag set, completing. By speeding up the frame-timer, we notice these new packets earlier. This increase

Re: [Qemu-devel] [PATCH 06/22] ehci: Speed up the timer of raising int from the async schedule

2012-10-15 Thread Gerd Hoffmann
On 10/15/12 12:38, Hans de Goede wrote: > Often the guest will queue up new packets in response to a packet, in the > async schedule with its IOC flag set, completing. By speeding up the > frame-timer, we notice these new packets earlier. This increases the > speed (MB/s) of a Linux guest reading f

[Qemu-devel] [PATCH 06/22] ehci: Speed up the timer of raising int from the async schedule

2012-10-15 Thread Hans de Goede
Often the guest will queue up new packets in response to a packet, in the async schedule with its IOC flag set, completing. By speeding up the frame-timer, we notice these new packets earlier. This increases the speed (MB/s) of a Linux guest reading from a USB mass storage device by a factor of 1.1