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[Qemu-devel] [RFC v3 PATCH 00/45] Initial support of multi-process qemu
From: |
Jagannathan Raman |
Subject: |
[Qemu-devel] [RFC v3 PATCH 00/45] Initial support of multi-process qemu |
Date: |
Tue, 3 Sep 2019 16:37:26 -0400 |
Started with the presentation in October 2017 made by Marc-Andre (Red Hat)
and Konrad Wilk (Oracle) [1], and continued by Jag's BoF at KVM Forum 2018,
the multi-process project is now a prototype and presented in this patchset.
This first series enables the emulation of lsi53c895a in a separate process.
We posted the Proof Of Concept patches [2] before the BoF session in 2018.
Subsequently, we posted RFC v1 [3] & RFC v2 [4] of this series.
Thanks to the v1 & v2 review, we were able to incorporate the feedback into
our goals.
In the summer of 2019, we participated in a conference with folks at RedHat,
who provided us with feedback to improve the design of this project.
We want to present version 3 of this series which incorporates the feedback
we received for v2 & the enhancements suggested in the conference. Following
are the improvements made in this series:
- The command-line arguments are Orchestrator friendly. A new option
named "-remote" carries the command-line of the emulation process.
Added "rid" suboption to the "-device" option and moved "-drive"
option to the emulation process's command-line.
- Redesigned Monitor interface allows direct access to the remote process,
thereby making it more scalable, maintainable & Orchestrator friendly.
We also enabled more monitor commands for the remote process.
- Enabled the remote process to run multiple LSI controllers
- Redesigned the communication link to support multiple channels. MMIO
transactions are carried out in a separate channel.
- Fixed the bugs discovered during testing. Individual patches provide
the details of these fixes.
Following people contributed to this patchset:
John G Johnson <address@hidden>
Jagannathan Raman <address@hidden>
Elena Ufimtseva <address@hidden>
Kanth Ghatraju <address@hidden>
For full concept writeup about QEMU disaggregation refer to
docs/devel/qemu-multiprocess.txt. Please refer to
docs/qemu-multiprocess.txt for usage information.
We are planning on making the following improvements in the future:
- Live migration
- Performance improvements
- Libvirt support
- Enforcement of security policies
- blockdev support
We welcome all your ideas, concerns, and questions for this patchset.
Thank you!
[1]:
http://events17.linuxfoundation.org/sites/events/files/slides/KVM%20FORUM%20multi-process.pdf
[1]: https://www.youtube.com/watch?v=Kq1-coHh7lg
[2]: https://www.mail-archive.com/address@hidden/msg566538.html
[3]: https://www.mail-archive.com/address@hidden/msg602285.html
[4]: https://www.mail-archive.com/address@hidden/msg624877.html
Elena Ufimtseva (20):
multi-process: add a command line option for debug file
multi-process: introduce proxy object
mutli-process: build remote command line args
multi-process: add support of device id to communication channel
multi-process: modify BARs read/write to support dev_id
multi-process: support dev id in config read/write
multi-process: configure remote side devices
multi-process: add qdev_proxy_add to create proxy devices
multi-process: remote: add setup_devices and setup_drive msg
processing
multi-process: remote: use fd for socket from parent process
multi-process: remote: add create_done condition
multi-process: add processing of remote drive and device command line
multi-process: refractor vl.c code to re-use in remote
multi-process: add remote option
multi-process: add remote options parser
multi-process: add parse_cmdline in remote process
multi-process: add support for multiple devices
multi-process: add heartbeat timer and signal handler
multi-process: handle heartbeat messages in remote process
multi-process: add configure and usage information
Jagannathan Raman (24):
multi-process: memory: alloc RAM from file at offset
multi-process: util: Add qemu_thread_cancel() to cancel running thread
multi-process: Add stub functions to facilate build of multi-process
multi-process: Add config option for multi-process QEMU
multi-process: build system for remote device process
multi-process: define proxy-link object
multi-process: add functions to synchronize proxy and remote endpoints
multi-process: setup PCI host bridge for remote device
multi-process: setup a machine object for remote device process
multi-process: setup memory manager for remote device
multi-process: remote process initialization
multi-process: PCI BAR read/write handling for proxy & remote
endpoints
multi-process: Add LSI device proxy object
multi-process: Synchronize remote memory
multi-process: create IOHUB object to handle irq
multi-process: Introduce build flags to separate remote process code
multi-process: Use separate MMIO communication channel
multi-process: perform device reset in the remote process
multi-process/mon: stub functions to enable QMP module for remote
process
multi-process/mon: build system for QMP module in remote process
multi-process/mon: Refactor monitor/chardev functions out of vl.c
multi-process/mon: trim HMP command set for remote storage processes
multi-process/mon: Initialize QMP module for remote processes
multi-process: prevent duplicate memory initialization in remote
John G Johnson (1):
multi-process: add the concept description to
docs/devel/qemu-multiprocess
Makefile | 2 +
Makefile.objs | 33 ++
Makefile.target | 91 +++++-
accel/stubs/kvm-stub.c | 5 +
accel/stubs/tcg-stub.c | 95 ++++++
backends/Makefile.objs | 2 +
block/Makefile.objs | 2 +
configure | 15 +
docs/devel/qemu-multiprocess.txt | 627 ++++++++++++++++++++++++++++++++++++
docs/qemu-multiprocess.txt | 86 +++++
exec.c | 14 +-
hmp-scsi-commands-info.hx | 167 ++++++++++
hmp-scsi-commands.hx | 384 ++++++++++++++++++++++
hw/Makefile.objs | 9 +
hw/block/Makefile.objs | 2 +
hw/core/Makefile.objs | 16 +
hw/nvram/Makefile.objs | 2 +
hw/pci/Makefile.objs | 4 +
hw/proxy/Makefile.objs | 1 +
hw/proxy/memory-sync.c | 226 +++++++++++++
hw/proxy/proxy-lsi53c895a.c | 168 ++++++++++
hw/proxy/qemu-proxy.c | 615 +++++++++++++++++++++++++++++++++++
hw/scsi/Makefile.objs | 2 +
include/exec/address-spaces.h | 2 +
include/exec/ram_addr.h | 2 +-
include/glib-compat.h | 4 +
include/hw/pci/pci_ids.h | 3 +
include/hw/proxy/memory-sync.h | 51 +++
include/hw/proxy/proxy-lsi53c895a.h | 42 +++
include/hw/proxy/qemu-proxy.h | 106 ++++++
include/hw/qdev-core.h | 2 +
include/io/proxy-link.h | 202 ++++++++++++
include/monitor/qdev.h | 24 ++
include/qemu-common.h | 8 +
include/qemu/log.h | 1 +
include/qemu/mmap-alloc.h | 3 +-
include/qemu/thread.h | 1 +
include/remote/iohub.h | 63 ++++
include/remote/machine.h | 48 +++
include/remote/memory.h | 34 ++
include/remote/pcihost.h | 59 ++++
io/Makefile.objs | 2 +
io/proxy-link.c | 363 +++++++++++++++++++++
memory.c | 2 +-
migration/Makefile.objs | 2 +
monitor/Makefile.objs | 3 +
monitor/misc.c | 84 ++---
monitor/monitor-internal.h | 38 +++
qapi/Makefile.objs | 2 +
qdev-monitor.c | 257 ++++++++++++++-
qemu-options.hx | 21 ++
qom/Makefile.objs | 5 +
remote/Makefile.objs | 6 +
remote/iohub.c | 159 +++++++++
remote/machine.c | 133 ++++++++
remote/memory.c | 99 ++++++
remote/pcihost.c | 84 +++++
remote/remote-main.c | 626 +++++++++++++++++++++++++++++++++++
remote/remote-opts.c | 123 +++++++
remote/remote-opts.h | 31 ++
rules.mak | 2 +-
stubs/gdbstub.c | 21 ++
stubs/machine-init-done.c | 4 +
stubs/migration.c | 162 ++++++++++
stubs/monitor.c | 65 ++++
stubs/net-stub.c | 100 ++++++
stubs/qapi-misc.c | 41 +++
stubs/qapi-target.c | 49 +++
stubs/replay.c | 18 ++
stubs/ui-stub.c | 130 ++++++++
stubs/vl-stub.c | 169 ++++++++++
stubs/vmstate.c | 20 ++
stubs/xen-mapcache.c | 22 ++
ui/Makefile.objs | 2 +
util/log.c | 2 +
util/mmap-alloc.c | 7 +-
util/oslib-posix.c | 2 +-
util/qemu-thread-posix.c | 10 +
vl-parse.c | 249 ++++++++++++++
vl.c | 298 ++++++++---------
vl.h | 58 ++++
81 files changed, 6466 insertions(+), 228 deletions(-)
create mode 100644 docs/devel/qemu-multiprocess.txt
create mode 100644 docs/qemu-multiprocess.txt
create mode 100644 hmp-scsi-commands-info.hx
create mode 100644 hmp-scsi-commands.hx
create mode 100644 hw/proxy/Makefile.objs
create mode 100644 hw/proxy/memory-sync.c
create mode 100644 hw/proxy/proxy-lsi53c895a.c
create mode 100644 hw/proxy/qemu-proxy.c
create mode 100644 include/hw/proxy/memory-sync.h
create mode 100644 include/hw/proxy/proxy-lsi53c895a.h
create mode 100644 include/hw/proxy/qemu-proxy.h
create mode 100644 include/io/proxy-link.h
create mode 100644 include/remote/iohub.h
create mode 100644 include/remote/machine.h
create mode 100644 include/remote/memory.h
create mode 100644 include/remote/pcihost.h
create mode 100644 io/proxy-link.c
create mode 100644 remote/Makefile.objs
create mode 100644 remote/iohub.c
create mode 100644 remote/machine.c
create mode 100644 remote/memory.c
create mode 100644 remote/pcihost.c
create mode 100644 remote/remote-main.c
create mode 100644 remote/remote-opts.c
create mode 100644 remote/remote-opts.h
create mode 100644 stubs/migration.c
create mode 100644 stubs/net-stub.c
create mode 100644 stubs/qapi-misc.c
create mode 100644 stubs/qapi-target.c
create mode 100644 stubs/ui-stub.c
create mode 100644 stubs/vl-stub.c
create mode 100644 stubs/xen-mapcache.c
create mode 100644 vl-parse.c
create mode 100644 vl.h
--
1.8.3.1
- [Qemu-devel] [RFC v3 PATCH 00/45] Initial support of multi-process qemu,
Jagannathan Raman <=
- [Qemu-devel] [RFC v3 PATCH 02/45] multi-process: util: Add qemu_thread_cancel() to cancel running thread, Jagannathan Raman, 2019/09/03
- [Qemu-devel] [RFC v3 PATCH 05/45] multi-process: Add config option for multi-process QEMU, Jagannathan Raman, 2019/09/03
- [Qemu-devel] [RFC v3 PATCH 04/45] multi-process: Add stub functions to facilate build of multi-process, Jagannathan Raman, 2019/09/03
- [Qemu-devel] [RFC v3 PATCH 08/45] multi-process: add functions to synchronize proxy and remote endpoints, Jagannathan Raman, 2019/09/03
- [Qemu-devel] [RFC v3 PATCH 07/45] multi-process: define proxy-link object, Jagannathan Raman, 2019/09/03