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qemu/include/sysemu
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Hyman Huang 52ac968ab2 migration: Support periodic RAMBlock dirty bitmap sync 
When VM is configured with huge memory, the current throttle logic
doesn't look like to scale, because migration_trigger_throttle()
is only called for each iteration, so it won't be invoked for a long
time if one iteration can take a long time.

The periodic dirty sync aims to fix the above issue by synchronizing
the ramblock from remote dirty bitmap and, when necessary, triggering
the CPU throttle multiple times during a long iteration.

This is a trade-off between synchronization overhead and CPU throttle
impact.

Signed-off-by: Hyman Huang <yong.huang@smartx.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Link: https://lore.kernel.org/r/f61f1b3653f2acf026901103e1c73d157d38b08f.1729146786.git.yong.huang@smartx.com
[peterx: make prev_cnt global, and reset for each migration]
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-10-31 15:48:18 -04:00
..
accel-blocker.h bulk: Do not declare function prototypes using 'extern' keyword 2023-08-31 19:47:43 +02:00
accel-ops.h sysemu: add set_virtual_time to accel ops 2024-06-24 10:14:34 +01:00
arch_init.h system: Remove support for CRIS target 2024-09-13 20:11:13 +02:00
balloon.h qapi: Restrict balloon-related commands to machine code 2020-09-29 15:41:35 +02:00
block-backend-common.h block: drain from main loop thread in bdrv_co_yield_to_drain() 2023-05-30 17:32:02 +02:00
block-backend-global-state.h block-backend: Remove deadcode 2024-10-03 17:26:06 +03:00
block-backend-io.h util/defer-call: move defer_call() to util/ 2023-10-31 15:41:42 +01:00
block-backend.h include/sysemu/block-backend: split header into I/O and global state (GS) API 2022-03-04 18:18:25 +01:00
block-ram-registrar.h block: add BlockRAMRegistrar 2022-10-26 14:56:42 -04:00
blockdev.h include/sysemu/blockdev.h: global state API 2022-03-04 18:18:25 +01:00
cpu-throttle.h migration: Support periodic RAMBlock dirty bitmap sync 2024-10-31 15:48:18 -04:00
cpu-timers-internal.h system: Rename softmmu/ directory as system/ 2023-10-08 21:08:08 +02:00
cpu-timers.h sysemu: add set_virtual_time to accel ops 2024-06-24 10:14:34 +01:00
cpus.h cpus: Remove unused smp_cores/smp_threads declarations 2023-10-12 00:37:39 +03:00
cryptodev-vhost-user.h cryptodev: Fix Lesser GPL version number 2020-10-27 16:48:49 +01:00
cryptodev-vhost.h include/: spelling fixes 2023-09-08 13:08:52 +03:00
cryptodev.h qapi/cryptodev: Rename QCryptodevBackendAlgType to *Algo, and drop prefix 2024-09-10 14:03:30 +02:00
device_tree.h kconfig: allow compiling out QEMU device tree code per target 2024-05-10 15:45:15 +02:00
dirtylimit.h migration: Extend query-migrate to provide dirty page limit info 2023-07-26 10:55:56 +02:00
dirtyrate.h include: Include headers where needed 2023-01-08 01:54:22 -05:00
dma.h dma: Fix function names in documentation 2024-10-15 15:16:17 +01:00
dump-arch.h dump: Add arch cleanup function 2023-11-14 10:42:32 +01:00
dump.h dump: Allow directly outputting raw kdump format 2023-11-02 18:05:02 +04:00
event-loop-base.h Don't include headers already included by qemu/osdep.h 2023-02-08 07:28:05 +01:00
host_iommu_device.h vfio/iommufd: Add hw_caps field to HostIOMMUDeviceCaps 2024-07-23 17:14:52 +02:00
hostmem.h backends/hostmem: Report error when memory size is unaligned 2024-06-08 10:33:38 +02:00
hvf_int.h hvf: Split up hv_vm_create logic per arch 2024-09-13 15:31:46 +01:00
hvf.h exec: Rename NEED_CPU_H -> COMPILING_PER_TARGET 2024-04-26 09:49:51 +02:00
hw_accel.h accel: Remove HAX accelerator 2023-08-31 19:46:43 +02:00
iommufd.h vfio/iommufd: Implement VFIOIOMMUClass::query_dirty_bitmap support 2024-07-23 17:14:52 +02:00
iothread.h include/: spelling fixes 2023-09-08 13:08:52 +03:00
kvm_int.h KVM: Rename KVMState->nr_slots to nr_slots_max 2024-10-17 19:41:30 +02:00
kvm_xen.h hw/xen: select kernel mode for per-vCPU event channel upcall vector 2023-11-06 10:03:45 +00:00
kvm.h kvm: Allow kvm_arch_get/put_registers to accept Error** 2024-10-03 22:04:19 +02:00
memory_mapping.h memory: follow Error API guidelines 2023-10-19 23:13:27 +02:00
numa.h numa: remove types from typedefs.h 2024-05-03 15:47:48 +02:00
nvmm.h exec: Rename NEED_CPU_H -> COMPILING_PER_TARGET 2024-04-26 09:49:51 +02:00
os-posix.h qemu_init: increase NOFILE soft limit on POSIX 2024-02-09 12:47:58 +00:00
os-win32.h qemu_init: increase NOFILE soft limit on POSIX 2024-02-09 12:47:58 +00:00
qtest.h qtest: move qtest_{get, set}_virtual_clock to accel/qtest/qtest.c 2024-06-24 10:14:56 +01:00
replay.h replay: Remove unused replay_disable_events 2024-10-03 17:26:06 +03:00
reset.h reset: Use ResetType for qemu_devices_reset() and MachineClass::reset() 2024-09-24 11:33:34 +02:00
rng-random.h Use OBJECT_DECLARE_SIMPLE_TYPE when possible 2020-09-18 14:12:32 -04:00
rng.h qom: Remove module_obj_name parameter from OBJECT_DECLARE* macros 2020-09-18 14:12:32 -04:00
rtc.h rtc: Use time_t for passing and returning time offsets 2023-08-31 09:45:18 +01:00
runstate-action.h system: Rename softmmu/ directory as system/ 2023-10-08 21:08:08 +02:00
runstate.h replay: allow runstate shutdown->running when replaying trace 2024-08-16 14:04:19 +01:00
seccomp.h sandbox: disable -sandbox if CONFIG_SECCOMP undefined 2018-06-01 13:44:15 +02:00
spdm-socket.h backends: Initial support for SPDM socket support 2024-07-22 20:15:42 -04:00
stats.h include/: spelling fixes 2023-09-08 13:08:52 +03:00
sysemu.h vl.c: Remove pxa2xx-specific -portrait and -rotate options 2024-10-15 15:16:17 +01:00
tcg.h accel: Document generic accelerator headers 2023-06-28 13:55:35 +02:00
tpm_backend.h include/: spelling fixes 2023-09-08 13:08:52 +03:00
tpm_util.h tpm: Fix Lesser GPL version number 2020-11-15 16:44:18 +01:00
tpm.h sysemu/tpm: Clean up global variable shadowing 2023-10-06 13:27:48 +02:00
vhost-user-backend.h qom: Remove module_obj_name parameter from OBJECT_DECLARE* macros 2020-09-18 14:12:32 -04:00
watchdog.h watchdog: remove -watchdog option 2022-09-29 11:40:28 +02:00
whpx.h exec: Rename NEED_CPU_H -> COMPILING_PER_TARGET 2024-04-26 09:49:51 +02:00
xen-mapcache.h xen: mapcache: Pass the ram_addr offset to xen_map_cache() 2024-06-09 20:16:14 +02:00
xen.h xen: mapcache: Add support for grant mappings 2024-06-09 20:16:14 +02:00