[Qemu-devel] [PATCH v2 0/3] Fix guest time drift under heavy load.

[Gleb Natapov]

Qemu device emulation for timers might be inaccurate and
causes coalescing of several IRQs into one. It happens when the
load on the host is high and the guest did not manage to ack the
previous IRQ. The first patch in the series fixes this by changing
qemu_irq subsystem to return IRQ delivery status information.
If device is notified that IRQs where lost it can regenerate them
as needed. The following two patches add IRQ regeneration to PIT and RTC
devices.

---

Gleb Natapov (3):
      Fix time drift problem under high load when RTC is in use.
      Fix time drift problem under high load when PIT is in use.
      Change qemu_set_irq() to return status information.


 hw/apic.c          |  103 +++++++++++++++++++++++++++++++++-------------------
 hw/arm_gic.c       |    6 ++-
 hw/arm_pic.c       |    4 ++
 hw/arm_timer.c     |    4 +-
 hw/cbus.c          |   12 +++++-
 hw/esp.c           |    4 ++
 hw/etraxfs_pic.c   |   12 ++++--
 hw/fdc.c           |    4 ++
 hw/heathrow_pic.c  |    4 ++
 hw/i8254.c         |   23 +++++++++++-
 hw/i8259.c         |   19 +++++++---
 hw/ide.c           |    8 +++-
 hw/integratorcp.c  |    4 ++
 hw/irq.c           |   10 +++--
 hw/irq.h           |   35 ++++++++++++------
 hw/max7310.c       |    4 ++
 hw/mc146818rtc.c   |   11 +++++-
 hw/mcf5206.c       |    4 ++
 hw/mcf_intc.c      |    6 ++-
 hw/mips_int.c      |    6 ++-
 hw/mpcore.c        |    4 ++
 hw/mst_fpga.c      |    4 ++
 hw/musicpal.c      |    4 ++
 hw/nseries.c       |    7 +++-
 hw/omap.h          |    2 +
 hw/omap1.c         |   44 +++++++++++++++++-----
 hw/omap2.c         |   12 +++++-
 hw/omap_dma.c      |    8 +++-
 hw/omap_mmc.c      |    4 ++
 hw/openpic.c       |    4 ++
 hw/palm.c          |    4 ++
 hw/pc.c            |    6 ++-
 hw/pc.h            |    2 +
 hw/pci.c           |    8 +++-
 hw/pcnet.c         |    4 ++
 hw/pl061.c         |    4 ++
 hw/pl190.c         |    4 ++
 hw/ppc.c           |   18 ++++++---
 hw/ppc4xx_devs.c   |    6 ++-
 hw/pxa2xx.c        |    4 ++
 hw/pxa2xx_gpio.c   |    6 ++-
 hw/pxa2xx_pcmcia.c |    6 ++-
 hw/pxa2xx_pic.c    |    4 ++
 hw/rc4030.c        |    4 ++
 hw/sbi.c           |    6 ++-
 hw/sharpsl.h       |    2 +
 hw/slavio_intctl.c |    8 +++-
 hw/sparc32_dma.c   |    4 ++
 hw/spitz.c         |   20 ++++++++--
 hw/ssd0323.c       |    4 ++
 hw/stellaris.c     |   10 ++++-
 hw/sun4c_intctl.c  |    4 ++
 hw/sun4m.c         |    7 +++-
 hw/tc6393xb.c      |    5 ++-
 hw/tusb6010.c      |    4 ++
 hw/twl92230.c      |    8 +++-
 hw/versatilepb.c   |    4 ++
 hw/zaurus.c        |    4 ++
 58 files changed, 385 insertions(+), 161 deletions(-)

-- 
        Gleb.