10218ae6d0
Let's make it easier to pin threads created via a ThreadContext to
all host CPUs currently belonging to a given set of host NUMA nodes --
which is the common case.
"node-affinity" is simply a shortcut for setting "cpu-affinity" manually
to the list of host CPUs belonging to the set of host nodes. This property
can only be written.
A simple QEMU example to set the CPU affinity to host node 1 on a system
with two nodes, 24 CPUs each, whereby odd-numbered host CPUs belong to
host node 1:
qemu-system-x86_64 -S \
-object thread-context,id=tc1,node-affinity=1
And we can query the cpu-affinity via HMP/QMP:
(qemu) qom-get tc1 cpu-affinity
[
1,
3,
5,
7,
9,
11,
13,
15,
17,
19,
21,
23,
25,
27,
29,
31,
33,
35,
37,
39,
41,
43,
45,
47
]
We cannot query the node-affinity:
(qemu) qom-get tc1 node-affinity
Error: Insufficient permission to perform this operation
But note that due to dynamic library loading this example will not work
before we actually make use of thread_context_create_thread() in QEMU
code, because the type will otherwise not get registered. We'll wire
this up next to make it work.
Note that if the host CPUs for a host node change due do CPU hot(un)plug
CPU onlining/offlining (i.e., lscpu output changes) after the ThreadContext
was started, the CPU affinity will not get updated.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20221014134720.168738-5-david@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
102 lines
3.9 KiB
Meson
102 lines
3.9 KiB
Meson
util_ss.add(files('osdep.c', 'cutils.c', 'unicode.c', 'qemu-timer-common.c'))
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util_ss.add(files('thread-context.c'), numa)
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if not config_host_data.get('CONFIG_ATOMIC64')
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util_ss.add(files('atomic64.c'))
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endif
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util_ss.add(when: 'CONFIG_POSIX', if_true: files('aio-posix.c'))
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util_ss.add(when: 'CONFIG_POSIX', if_true: files('fdmon-poll.c'))
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if config_host_data.get('CONFIG_EPOLL_CREATE1')
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util_ss.add(files('fdmon-epoll.c'))
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endif
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util_ss.add(when: linux_io_uring, if_true: files('fdmon-io_uring.c'))
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util_ss.add(when: 'CONFIG_POSIX', if_true: files('compatfd.c'))
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util_ss.add(when: 'CONFIG_POSIX', if_true: files('event_notifier-posix.c'))
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util_ss.add(when: 'CONFIG_POSIX', if_true: files('mmap-alloc.c'))
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freebsd_dep = []
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if targetos == 'freebsd'
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freebsd_dep = util
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endif
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util_ss.add(when: 'CONFIG_POSIX', if_true: [files('oslib-posix.c'), freebsd_dep])
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util_ss.add(when: 'CONFIG_POSIX', if_true: files('qemu-thread-posix.c'))
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util_ss.add(when: 'CONFIG_POSIX', if_true: files('memfd.c'))
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util_ss.add(when: 'CONFIG_WIN32', if_true: files('aio-win32.c'))
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util_ss.add(when: 'CONFIG_WIN32', if_true: files('event_notifier-win32.c'))
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util_ss.add(when: 'CONFIG_WIN32', if_true: files('oslib-win32.c'))
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util_ss.add(when: 'CONFIG_WIN32', if_true: files('qemu-thread-win32.c'))
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util_ss.add(when: 'CONFIG_WIN32', if_true: winmm)
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util_ss.add(when: 'CONFIG_WIN32', if_true: pathcch)
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util_ss.add(files('envlist.c', 'path.c', 'module.c'))
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util_ss.add(files('host-utils.c'))
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util_ss.add(files('bitmap.c', 'bitops.c'))
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util_ss.add(files('fifo8.c'))
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util_ss.add(files('cacheflush.c'))
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util_ss.add(files('error.c', 'error-report.c'))
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util_ss.add(files('qemu-print.c'))
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util_ss.add(files('id.c'))
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util_ss.add(files('qemu-config.c', 'notify.c'))
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util_ss.add(files('qemu-option.c', 'qemu-progress.c'))
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util_ss.add(files('keyval.c'))
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util_ss.add(files('crc32c.c'))
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util_ss.add(files('uuid.c'))
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util_ss.add(files('getauxval.c'))
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util_ss.add(files('rcu.c'))
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if have_membarrier
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util_ss.add(files('sys_membarrier.c'))
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endif
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util_ss.add(files('log.c'))
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util_ss.add(files('qdist.c'))
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util_ss.add(files('qht.c'))
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util_ss.add(files('qsp.c'))
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util_ss.add(files('range.c'))
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util_ss.add(files('stats64.c'))
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util_ss.add(files('systemd.c'))
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util_ss.add(files('transactions.c'))
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util_ss.add(when: 'CONFIG_POSIX', if_true: files('drm.c'))
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util_ss.add(files('guest-random.c'))
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util_ss.add(files('yank.c'))
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util_ss.add(files('int128.c'))
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util_ss.add(files('memalign.c'))
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if have_user
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util_ss.add(files('selfmap.c'))
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endif
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if have_system
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util_ss.add(files('crc-ccitt.c'))
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util_ss.add(when: gio, if_true: files('dbus.c'))
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util_ss.add(when: 'CONFIG_LINUX', if_true: files('userfaultfd.c'))
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endif
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if have_block
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util_ss.add(files('aiocb.c', 'async.c', 'aio-wait.c'))
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util_ss.add(files('base64.c'))
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util_ss.add(files('buffer.c'))
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util_ss.add(files('bufferiszero.c'))
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util_ss.add(files('coroutine-@0@.c'.format(config_host['CONFIG_COROUTINE_BACKEND'])))
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util_ss.add(files('hbitmap.c'))
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util_ss.add(files('hexdump.c'))
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util_ss.add(files('iova-tree.c'))
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util_ss.add(files('iov.c', 'qemu-sockets.c', 'uri.c'))
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util_ss.add(files('lockcnt.c'))
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util_ss.add(files('main-loop.c'))
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util_ss.add(files('nvdimm-utils.c'))
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util_ss.add(files('qemu-coroutine.c', 'qemu-coroutine-lock.c', 'qemu-coroutine-io.c'))
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util_ss.add(when: 'CONFIG_LINUX', if_true: [
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files('vhost-user-server.c'), vhost_user
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])
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util_ss.add(files('block-helpers.c'))
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util_ss.add(files('qemu-coroutine-sleep.c'))
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util_ss.add(files('qemu-co-shared-resource.c'))
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util_ss.add(files('qemu-co-timeout.c'))
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util_ss.add(files('thread-pool.c', 'qemu-timer.c'))
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util_ss.add(files('readline.c'))
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util_ss.add(files('throttle.c'))
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util_ss.add(files('timed-average.c'))
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if config_host_data.get('CONFIG_INOTIFY1')
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util_ss.add(files('filemonitor-inotify.c'))
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else
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util_ss.add(files('filemonitor-stub.c'))
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endif
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util_ss.add(when: 'CONFIG_LINUX', if_true: files('vfio-helpers.c'))
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endif
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