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[Qemu-devel] [PATCH v5 0/5] migration: Dynamic cpu throttling for auto-c
From: |
Jason J. Herne |
Subject: |
[Qemu-devel] [PATCH v5 0/5] migration: Dynamic cpu throttling for auto-converge |
Date: |
Tue, 1 Sep 2015 10:45:58 -0400 |
This patch set provides a new method for throttling a vcpu and makes use of said
method to dynamically increase cpu throttling during an autoconverge
migration until the migration completes.
This work is related to the following discussion:
https://lists.gnu.org/archive/html/qemu-devel/2015-03/msg00287.html
Previous version review is here:
https://lists.gnu.org/archive/html/qemu-devel/2015-07/msg00734.html
Changelog
-----------
v5
- Add cpu->throttle_thread_scheduled flag to prevent callbacks from stacking up
- Correct error in formula used to reset the timer
- Add atomic operations to protect throttle_percentage
- Make use of cpu_throttle_get_percentage() instead of accessing data directly
- Various small formatting/style fixes
v4
- Switch to a static timer
- Use QEMU_CLOCK_VIRTUAL_RT instead of QEMU_CLOCK_REALTIME
- Get rid of throttle_timer_stop, use throttle_percentage = 0 instead
- Calculate throttle_ratio directly in cpu_throttle_thread
- Consolidate timer mod operations to single function
- Remove some unneeded cpu_throttle_active() checks
- Check for throttle_percentage == 0 in cpu_throttle_thread
- Change throttle_percentage to unsigned int
- Renamed cpu_throttle_timer_pop to cpu_throttle_timer_tick
v3
- Cpu throttling parameters moved from CPUState to global scope
- Throttling interface now uses a percentage instead of ratio
- Migration parameters added to allow tweaking of how aggressive throttling is
- Add throttle active check to the throttle stop routine.
- Remove asserts from throttle start/stop functions and instead force the input
to fall within the acceptable range
- Rename cpu_throttle_start to cpu_throttle_set to better describe its purpose
- Remove unneeded object casts
- Fixed monitor output formatting
- Comment cleanups
v2
- Add cpu throttle ratio output to hmp/qmp info/query migrate commands
v1
- Initial
Jason J. Herne (5):
cpu: Provide vcpu throttling interface
migration: Parameters for auto-converge cpu throttling
migration: Dynamic cpu throttling for auto-converge
qmp/hmp: Add throttle ratio to query-migrate and info migrate
migration: Disambiguate MAX_THROTTLE
arch_init.c | 88 ++++++++++++++++++---------------------------------
cpus.c | 78 +++++++++++++++++++++++++++++++++++++++++++++
hmp.c | 21 ++++++++++++
include/qom/cpu.h | 43 +++++++++++++++++++++++++
migration/migration.c | 57 +++++++++++++++++++++++++++++++--
qapi-schema.json | 40 ++++++++++++++++++++---
6 files changed, 263 insertions(+), 64 deletions(-)
--
1.9.1
- [Qemu-devel] [PATCH v5 0/5] migration: Dynamic cpu throttling for auto-converge,
Jason J. Herne <=