- 15 4月, 2011 1 次提交
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由 Paolo Bonzini 提交于
The previous patch however is not enough, because if the virtual CPU goes to sleep waiting for a future timer interrupt to wake it up, qemu deadlocks. The timer interrupt never comes because time is driven by icount, but the vCPU doesn't run any insns. You could say that VCPUs should never go to sleep in icount mode if there is a pending vm_clock timer; rather time should just warp to the next vm_clock event with no sleep ever taking place. Even better, you can sleep for some time related to the time left until the next event, to avoid that the warps are too visible externally; for example, you could be sending network packets continously instead of every 100ms. This is what this patch implements. qemu_clock_warp is called: 1) whenever a vm_clock timer is adjusted, to ensure the warp_timer is synchronized; 2) at strategic points in the CPU thread, to make sure the insn counter is synchronized before the CPU starts running. In any case, the warp_timer is disabled while the CPU is running, because the insn counter will then be making progress on its own. Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com> Tested-by: NEdgar E. Iglesias <edgar.iglesias@gmail.com> Signed-off-by: NEdgar E. Iglesias <edgar.iglesias@gmail.com>
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- 21 3月, 2011 3 次提交
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由 Paolo Bonzini 提交于
These patches are already not doing a great service to out-of-tree modifications to QEMU. However, at least we can warn them by getting rid of the old confusing functions, or otherwise causing compilation errors. This patch removes qemu_get_clock; the previous one changed qemu_new_timer's signature. Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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由 Paolo Bonzini 提交于
This enables rt_clock timers to use nanosecond resolution, just by using the _ns functions; there is really no reason to forbid that. Migrated timers are all using vm_clock (of course; but I checked that anyway) so the timers in the savevm files are already in nanosecond resolution. So this patch makes no change to the migration format. Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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由 Paolo Bonzini 提交于
The code doesn't make much sense right now, but it will as soon as timers will be able to scale their resolution arbitrarily. Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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- 30 10月, 2010 1 次提交
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由 malc 提交于
Signed-off-by: Nmalc <av1474@comtv.ru>
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- 23 10月, 2010 1 次提交
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由 Blue Swirl 提交于
Move timer init functions to a new file, qemu-timer-common.c. Make other critical timer functions inlined to preserve performance in qemu-timer.c, also move muldiv64() (used by the inline functions) to qemu-timer.h. Adjust block/raw-posix.c and simpletrace.c to use get_clock() directly. Remove a similar/duplicate definition in qemu-tool.c. Adjust hw/omap_clk.c to include qemu-timer.h because muldiv64() is used there. After this change, tracing can be used also for user code and simpletrace on Win32. Cc: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Acked-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>
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- 27 4月, 2010 1 次提交
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由 Richard Henderson 提交于
Signed-off-by: NRichard Henderson <rth@twiddle.net> Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>
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- 18 4月, 2010 1 次提交
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由 Richard Henderson 提交于
There's a header file inclusion ordering problem between cpu-all.h and qemu-timer.h, such that cpu_get_real_ticks is not defined when we attempt to use it in profile_getclock. Signed-off-by: NRichard Henderson <rth@twiddle.net> Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>
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- 03 4月, 2010 1 次提交
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由 Alexander Graf 提交于
PowerPC CPUs have had two ways to read the time base for quite some time now. They provide it using the mfspr instruction or - if a special bit is set in that opcode - using mftb. For timekeeping we're currently using mftb. While trying to get Qemu up and running on an e500v2 system, I stumbled over the CPU not supporting mftbu. It just throws an illegal instruction trap. So let's read the SPR values instead. All PPC CPUs should support them anyways. I tested this patch on an e500v2 system where it makes qemu work and on my 970MP system with 32-bit user space where everything still works with this patch applied. Signed-off-by: NAlexander Graf <agraf@suse.de> Signed-off-by: Nmalc <av1474@comtv.ru>
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- 30 3月, 2010 1 次提交
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由 Blue Swirl 提交于
Arrange various declarations so that also non-CPU code can access them, adjust users. Move CPU specific code to cpus.c. Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>
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- 18 3月, 2010 1 次提交
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由 Paolo Bonzini 提交于
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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- 10 2月, 2010 1 次提交
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由 Paolo Bonzini 提交于
Some places use get_clock directly because they want to access the rt_clock with nanosecond precision. Add a function to do exactly that instead of using internal interfaces. Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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- 05 10月, 2009 1 次提交
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由 Jan Kiszka 提交于
Despite its name QEMU_CLOCK_REALTIME is (normally) not using CLOCK_REALTIME / the host system time as base. In order to allow also non-trivial RTC emulations (MC146818) to follow the host time instead of the virtual guest time, introduce the new clock type QEMU_CLOCK_HOST. It is unconditionally based on CLOCK_REALTIME, thus will follow system time changes of the host. The only limitation of its current implementation is that pending host_clock timers may not fire early if the host time is pushed forward beyond their expiry. So far no urgent need to overcome this limitation was identified, so it's left as simple as it is (expiry on next alarm timer tick). Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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- 12 9月, 2009 1 次提交
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由 Anthony Liguori 提交于
ticks_per_sec is a constant. There's no need to store it as a variable as it never changes since our time is based on units. Convert get_ticks_per_sec() to a static inline and move the constant into qemu-timer.h. Remove all references to QEMU_TIMER_BASE so that we consistently use this interface. Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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- 11 9月, 2009 1 次提交
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由 Juan Quintela 提交于
Signed-off-by: NJuan Quintela <quintela@redhat.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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- 11 8月, 2009 1 次提交
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由 Stefano Stabellini 提交于
This patch introduces dynamic timer intervals: we slow down the refresh rate when there in no much activity but we get back to a fast refresh rate when the activity resume. Please note that qemu_timer_expired is not an inline function any more because I needed to call it from vnc.c however I don't think this change should have any serious consequence. Signed-off-by: NStefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com> Message-Id:
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- 18 11月, 2007 1 次提交
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由 pbrook 提交于
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3674 c046a42c-6fe2-441c-8c8c-71466251a162
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