Merge tag 'migration-20241030-pull-request' of https://gitlab.com/peterx/qemu into staging

Migration pull request for softfreeze

v2:
- Patch "migration: Move cpu-throttle.c from system to migration

Merge tag 'migration-20241030-pull-request' of https://gitlab.com/peterx/qemu into staging

Migration pull request for softfreeze

v2:
- Patch "migration: Move cpu-throttle.c from system to migration",
fix build on MacOS, and subject spelling

NOTE: checkpatch.pl could report a false positive on this branch:

WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
#21:
{include/sysemu => migration}/cpu-throttle.h | 0

That's covered by "F: migration/" entry.

Changelog:

- Peter's cleanup patch on migrate_fd_cleanup()
- Peter's cleanup patch to introduce thread name macros
- Hanna's error path fix for vmstate subsection save()s
- Hyman's auto converge enhancement on background dirty sync
- Peter's additional tracepoints for save state entries
- Thomas's build fix for OpenBSD in dirtyrate.c
- Peter's deprecation of query-migrationthreads command
- Peter's cleanup/fixes from the "export misc.h" series
- Maciej's two small patches from multifd+vfio series

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# gpg: issuer "peterx@redhat.com"
# gpg: Good signature from "Peter Xu <xzpeter@gmail.com>" [marginal]
# gpg: aka "Peter Xu <peterx@redhat.com>" [marginal]
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg: It is not certain that the signature belongs to the owner.
# Primary key fingerprint: B918 4DC2 0CC4 57DA CF7D D1A9 3B5F CCCD F3AB D706

* tag 'migration-20241030-pull-request' of https://gitlab.com/peterx/qemu:
migration/multifd: Zero p->flags before starting filling a packet
migration/ram: Add load start trace event
migration: Drop migration_is_idle()
migration: Drop migration_is_setup_or_active()
migration: Unexport ram_mig_init()
migration: Unexport dirty_bitmap_mig_init()
migration: Take migration object refcount earlier for threads
migration: Deprecate query-migrationthreads command
migration/dirtyrate: Silence warning about strcpy() on OpenBSD
tests/migration: Add case for periodic ramblock dirty sync
migration: Support periodic RAMBlock dirty bitmap sync
migration: Remove "rs" parameter in migration_bitmap_sync_precopy
migration: Move cpu-throttle.c from system to migration
migration: Stop CPU throttling conditionally
accel/tcg/icount-common: Remove the reference to the unused header file
migration: Ensure vmstate_save() sets errp
migration: Put thread names together with macros
migration: Cleanup migrate_fd_cleanup() on accessing to_dst_file

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

show more ...

migration/dirtyrate: Silence warning about strcpy() on OpenBSD

The linker on OpenBSD complains:

ld: warning: dirtyrate.c:447 (../src/migration/dirtyrate.c:447)(...):
warning: strcpy() is almost a

migration/dirtyrate: Silence warning about strcpy() on OpenBSD

The linker on OpenBSD complains:

ld: warning: dirtyrate.c:447 (../src/migration/dirtyrate.c:447)(...):
warning: strcpy() is almost always misused, please use strlcpy()

It's currently not a real problem in this case since both arrays
have the same size (256 bytes). But just in case somebody changes
the size of the source array in the future, let's better play safe
and use g_strlcpy() here instead, with an additional check that the
string has been copied as a whole.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Hyman Huang <yong.huang@smartx.com>
Link: https://lore.kernel.org/r/20241022063402.184213-1-thuth@redhat.com
[peterx: Fix over-80 chars]
Signed-off-by: Peter Xu <peterx@redhat.com>

show more ...

migration: Put thread names together with macros

Keep migration thread names together, so it's easier to see a list of all
possible migration threads.

Still two functional changes below besides the

migration: Put thread names together with macros

Keep migration thread names together, so it's easier to see a list of all
possible migration threads.

Still two functional changes below besides the macro defintions:

- There's one dirty rate thread that we overlooked before, now we add
that too and name it as "mig/dirtyrate" following the old rules.

- The old name "mig/src/rp-thr" has "-thr" but it may not be useful if
it's a thread name anyway, while "rp" can be slightly hard to read.
Taking this chance to rename it to "mig/src/return", hopefully a better
name.

Reviewed-by: Fabiano Rosas <farosas@suse.de>
Acked-by: Hyman Huang <yong.huang@smartx.com>
Reviewed-by: Zhang Chen <chen.zhang@intel.com>
Link: https://lore.kernel.org/r/20241011153652.517440-1-peterx@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>

show more ...

Merge tag 'warn-pull-request' of https://gitlab.com/marcandre.lureau/qemu into staging

-Werror=maybe-uninitialized fixes

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Merge tag 'warn-pull-request' of https://gitlab.com/marcandre.lureau/qemu into staging

-Werror=maybe-uninitialized fixes

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# gpg: Good signature from "Marc-André Lureau <marcandre.lureau@redhat.com>" [full]
# gpg: aka "Marc-André Lureau <marcandre.lureau@gmail.com>" [full]
# Primary key fingerprint: 87A9 BD93 3F87 C606 D276 F62D DAE8 E109 7596 9CE5

* tag 'warn-pull-request' of https://gitlab.com/marcandre.lureau/qemu: (22 commits)
qom/object: fix -Werror=maybe-uninitialized
fsdep/9p: fix -Werror=maybe-uninitialized false-positive
block: fix -Werror=maybe-uninitialized false-positive
hw/virtio: freeing leaked memory from vhost_svq_get_buf in vhost_svq_poll
hw/virtio: fix -Werror=maybe-uninitialized
tests: fix -Werror=maybe-uninitialized false-positive
target/loongarch: fix -Werror=maybe-uninitialized false-positive
linux-user/hppa: fix -Werror=maybe-uninitialized false-positive
migration: fix -Werror=maybe-uninitialized false-positive
hw/virtio-blk: fix -Werror=maybe-uninitialized false-positive
migration: fix -Werror=maybe-uninitialized false-positives
block/block-copy: fix -Werror=maybe-uninitialized false-positive
hw/sdhci: fix -Werror=maybe-uninitialized false-positive
hw/vhost-scsi: fix -Werror=maybe-uninitialized
hw/ahci: fix -Werror=maybe-uninitialized false-positive
block/stream: fix -Werror=maybe-uninitialized false-positives
block/mirror: fix -Werror=maybe-uninitialized false-positive
block/mirror: fix -Werror=maybe-uninitialized false-positive
nbd: fix -Werror=maybe-uninitialized false-positive
hw/qxl: fix -Werror=maybe-uninitialized false-positives
...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

show more ...

migration: fix -Werror=maybe-uninitialized false-positives

../migration/dirtyrate.c:186:5: error: ‘records’ may be used uninitialized [-Werror=maybe-uninitialized]
../migration/dirtyrate.c:168:12: e

migration: fix -Werror=maybe-uninitialized false-positives

../migration/dirtyrate.c:186:5: error: ‘records’ may be used uninitialized [-Werror=maybe-uninitialized]
../migration/dirtyrate.c:168:12: error: ‘gen_id’ may be used uninitialized [-Werror=maybe-uninitialized]
../migration/migration.c:2273:5: error: ‘file’ may be used uninitialized [-Werror=maybe-uninitialized]

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Acked-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Hyman Huang <yong.huang@smartx.com>

show more ...

Merge tag 'pull-request-2024-09-25' of https://gitlab.com/thuth/qemu into staging

* Convert more Avocado tests to the new functional test framework
* Clean up assert() statements, use g_assert_not_r

Merge tag 'pull-request-2024-09-25' of https://gitlab.com/thuth/qemu into staging

* Convert more Avocado tests to the new functional test framework
* Clean up assert() statements, use g_assert_not_reached() when possible
* Improve output of the gitlab CI jobs

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# gpg: Good signature from "Thomas Huth <th.huth@gmx.de>" [full]
# gpg: aka "Thomas Huth <thuth@redhat.com>" [full]
# gpg: aka "Thomas Huth <huth@tuxfamily.org>" [full]
# gpg: aka "Thomas Huth <th.huth@posteo.de>" [unknown]
# Primary key fingerprint: 27B8 8847 EEE0 2501 18F3 EAB9 2ED9 D774 FE70 2DB5

* tag 'pull-request-2024-09-25' of https://gitlab.com/thuth/qemu: (44 commits)
.gitlab-ci.d: Make separate collapsible log sections for build and test
.gitlab-ci.d: Split build and test in cross build job templates
scripts/checkpatch.pl: emit error when using assert(false)
tests/qtest: remove return after g_assert_not_reached()
qom: remove return after g_assert_not_reached()
qobject: remove return after g_assert_not_reached()
migration: remove return after g_assert_not_reached()
hw/ppc: remove return after g_assert_not_reached()
hw/pci: remove return after g_assert_not_reached()
hw/net: remove return after g_assert_not_reached()
hw/hyperv: remove return after g_assert_not_reached()
include/qemu: remove return after g_assert_not_reached()
tcg/loongarch64: remove break after g_assert_not_reached()
fpu: remove break after g_assert_not_reached()
target/riscv: remove break after g_assert_not_reached()
target/arm: remove break after g_assert_not_reached()
hw/tpm: remove break after g_assert_not_reached()
hw/scsi: remove break after g_assert_not_reached()
hw/net: remove break after g_assert_not_reached()
hw/acpi: remove break after g_assert_not_reached()
...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

show more ...

migration: remove return after g_assert_not_reached()

This patch is part of a series that moves towards a consistent use of
g_assert_not_reached() rather than an ad hoc mix of different
assertion me

migration: remove return after g_assert_not_reached()

This patch is part of a series that moves towards a consistent use of
g_assert_not_reached() rather than an ad hoc mix of different
assertion mechanisms.

Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20240919044641.386068-31-pierrick.bouvier@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>

show more ...

migration: replace assert(false) with g_assert_not_reached()

This patch is part of a series that moves towards a consistent use of
g_assert_not_reached() rather than an ad hoc mix of different
asser

migration: replace assert(false) with g_assert_not_reached()

This patch is part of a series that moves towards a consistent use of
g_assert_not_reached() rather than an ad hoc mix of different
assertion mechanisms.

Reviewed-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Message-ID: <20240919044641.386068-14-pierrick.bouvier@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>

show more ...

Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into staging

Build system and target/i386/translate.c cleanups

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Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into staging

Build system and target/i386/translate.c cleanups

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# gpg: aka "Paolo Bonzini <pbonzini@redhat.com>" [full]

* tag 'for-upstream' of https://gitlab.com/bonzini/qemu: (24 commits)
migration: remove unnecessary zlib dependency
meson: do not query modules before they are processed
tcg: include dependencies in static_library()
meson: remove unnecessary dependency
meson: remove unnecessary reference to libm
target/i386: remove aflag argument of gen_lea_v_seg
target/i386: clean up repeated string operations
target/i386: introduce gen_lea_ss_ofs
target/i386: use mo_stacksize more
target/i386: inline gen_add_A0_ds_seg
target/i386: split gen_ldst_modrm for load and store
target/i386: reg in gen_ldst_modrm is always OR_TMP0
target/i386: raze the gen_eob* jungle
target/i386: assert that gen_update_eip_cur and gen_update_eip_next are the same in tb_stop
target/i386: avoid calling gen_eob_inhibit_irq before tb_stop
target/i386: avoid calling gen_eob_syscall before tb_stop
target/i386: document and group DISAS_* constants
target/i386: set CC_OP in helpers if they want CC_OP_EFLAGS
target/i386: cpu_load_eflags already sets cc_op
target/i386: remove unnecessary gen_update_cc_op before gen_eob*
...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

show more ...

migration: remove unnecessary zlib dependency

zlib code is only used by the emulators, not by the tests.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

Merge tag 'migration-20240423-pull-request' of https://gitlab.com/peterx/qemu into staging

Migration pull for 9.1

- Het's new test cases for "channels"
- Het's fix for a typo for vsock parsing
- Ce

Merge tag 'migration-20240423-pull-request' of https://gitlab.com/peterx/qemu into staging

Migration pull for 9.1

- Het's new test cases for "channels"
- Het's fix for a typo for vsock parsing
- Cedric's VFIO error report series
- Cedric's one more patch for dirty-bitmap error reports
- Zhijian's rdma deprecation patch
- Yuan's zeropage optimization to fix double faults on anon mem
- Zhijian's COLO fix on a crash

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# gpg: Good signature from "Peter Xu <xzpeter@gmail.com>" [unknown]
# gpg: aka "Peter Xu <peterx@redhat.com>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: B918 4DC2 0CC4 57DA CF7D D1A9 3B5F CCCD F3AB D706

* tag 'migration-20240423-pull-request' of https://gitlab.com/peterx/qemu: (26 commits)
migration/colo: Fix bdrv_graph_rdlock_main_loop: Assertion `!qemu_in_coroutine()' failed.
migration/multifd: solve zero page causing multiple page faults
migration: Add Error** argument to add_bitmaps_to_list()
migration: Modify ram_init_bitmaps() to report dirty tracking errors
migration: Add Error** argument to xbzrle_init()
migration: Add Error** argument to ram_state_init()
memory: Add Error** argument to the global_dirty_log routines
migration: Introduce ram_bitmaps_destroy()
memory: Add Error** argument to .log_global_start() handler
migration: Add Error** argument to .load_setup() handler
migration: Add Error** argument to .save_setup() handler
migration: Add Error** argument to qemu_savevm_state_setup()
migration: Add Error** argument to vmstate_save()
migration: Always report an error in ram_save_setup()
migration: Always report an error in block_save_setup()
vfio: Always report an error in vfio_save_setup()
s390/stattrib: Add Error** argument to set_migrationmode() handler
tests/qtest/migration: Fix typo for vsock in SocketAddress_to_str
tests/qtest/migration: Add negative tests to validate migration QAPIs
tests/qtest/migration: Add multifd_tcp_plain test using list of channels instead of uri
...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

show more ...

memory: Add Error** argument to the global_dirty_log routines

Now that the log_global*() handlers take an Error** parameter and
return a bool, do the same for memory_global_dirty_log_start() and
mem

memory: Add Error** argument to the global_dirty_log routines

Now that the log_global*() handlers take an Error** parameter and
return a bool, do the same for memory_global_dirty_log_start() and
memory_global_dirty_log_stop(). The error is reported in the callers
for now and it will be propagated in the call stack in the next
changes.

To be noted a functional change in ram_init_bitmaps(), if the dirty
pages logger fails to start, there is no need to synchronize the dirty
pages bitmaps. colo_incoming_start_dirty_log() could be modified in a
similar way.

Cc: Stefano Stabellini <sstabellini@kernel.org>
Cc: Anthony Perard <anthony.perard@citrix.com>
Cc: Paul Durrant <paul@xen.org>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Hyman Huang <yong.huang@smartx.com>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Acked-by: Peter Xu <peterx@redhat.com>
Link: https://lore.kernel.org/r/20240320064911.545001-12-clg@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>

show more ...

Merge tag 'block-pull-request' of https://gitlab.com/stefanha/qemu into staging

Pull request

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Merge tag 'block-pull-request' of https://gitlab.com/stefanha/qemu into staging

Pull request

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# -----END PGP SIGNATURE-----
# gpg: Signature made Mon 08 Jan 2024 16:37:25 GMT
# gpg: using RSA key 8695A8BFD3F97CDAAC35775A9CA4ABB381AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>" [full]
# gpg: aka "Stefan Hajnoczi <stefanha@gmail.com>" [full]
# Primary key fingerprint: 8695 A8BF D3F9 7CDA AC35 775A 9CA4 ABB3 81AB 73C8

* tag 'block-pull-request' of https://gitlab.com/stefanha/qemu:
Rename "QEMU global mutex" to "BQL" in comments and docs
Replace "iothread lock" with "BQL" in comments
qemu/main-loop: rename qemu_cond_wait_iothread() to qemu_cond_wait_bql()
qemu/main-loop: rename QEMU_IOTHREAD_LOCK_GUARD to BQL_LOCK_GUARD
system/cpus: rename qemu_mutex_lock_iothread() to bql_lock()
iothread: Remove unused Error** argument in aio_context_set_aio_params

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

show more ...

system/cpus: rename qemu_mutex_lock_iothread() to bql_lock()

The Big QEMU Lock (BQL) has many names and they are confusing. The
actual QemuMutex variable is called qemu_global_mutex but it's commonl

system/cpus: rename qemu_mutex_lock_iothread() to bql_lock()

The Big QEMU Lock (BQL) has many names and they are confusing. The
actual QemuMutex variable is called qemu_global_mutex but it's commonly
referred to as the BQL in discussions and some code comments. The
locking APIs, however, are called qemu_mutex_lock_iothread() and
qemu_mutex_unlock_iothread().

The "iothread" name is historic and comes from when the main thread was
split into into KVM vcpu threads and the "iothread" (now called the main
loop thread). I have contributed to the confusion myself by introducing
a separate --object iothread, a separate concept unrelated to the BQL.

The "iothread" name is no longer appropriate for the BQL. Rename the
locking APIs to:
- void bql_lock(void)
- void bql_unlock(void)
- bool bql_locked(void)

There are more APIs with "iothread" in their names. Subsequent patches
will rename them. There are also comments and documentation that will be
updated in later patches.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Paul Durrant <paul@xen.org>
Acked-by: Fabiano Rosas <farosas@suse.de>
Acked-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Acked-by: Peter Xu <peterx@redhat.com>
Acked-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
Acked-by: Hyman Huang <yong.huang@smartx.com>
Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Message-id: 20240102153529.486531-2-stefanha@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

show more ...

Merge tag 'dirtylimit-dirtyrate-pull-request-20231225' of https://github.com/newfriday/qemu into staging

dirtylimit dirtyrate pull request 20231225

Nitpick about an unused parameter
Please apply, t

Merge tag 'dirtylimit-dirtyrate-pull-request-20231225' of https://github.com/newfriday/qemu into staging

dirtylimit dirtyrate pull request 20231225

Nitpick about an unused parameter
Please apply, thanks,
Yong

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# gpg: Signature made Mon 25 Dec 2023 05:18:01 EST
# gpg: using RSA key 685D0220DC264828152E57C2DFF223D6B3FECB9C
# gpg: issuer "yong.huang@smartx.com"
# gpg: Good signature from "Yong Huang <yong.huang@smartx.com>" [unknown]
# gpg: WARNING: The key's User ID is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 685D 0220 DC26 4828 152E 57C2 DFF2 23D6 B3FE CB9C

* tag 'dirtylimit-dirtyrate-pull-request-20231225' of https://github.com/newfriday/qemu:
migration/dirtyrate: Remove an extra parameter

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

show more ...

migration/dirtyrate: Remove an extra parameter

vcpu_dirty_stat_collect() has an unused parameter so remove it.

Signed-off-by: Wafer <wafer@jaguarmicro.com>
Reviewed-by: Hyman Huang <yong.huang@smar

migration/dirtyrate: Remove an extra parameter

vcpu_dirty_stat_collect() has an unused parameter so remove it.

Signed-off-by: Wafer <wafer@jaguarmicro.com>
Reviewed-by: Hyman Huang <yong.huang@smartx.com>
Message-Id: <20231204012230.4123-1-wafer@jaguarmicro.com>

show more ...

Merge tag 'dirtylimit-dirtyrate-pull-request-20231010' of https://github.com/newfriday/qemu into staging

Dirtylimit and dirtyrate 20231010 patches PULL request

Dirty page rate measurement optimizat

Merge tag 'dirtylimit-dirtyrate-pull-request-20231010' of https://github.com/newfriday/qemu into staging

Dirtylimit and dirtyrate 20231010 patches PULL request

Dirty page rate measurement optimization.
Please apply, thanks, Yong.

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# gpg: Signature made Mon 09 Oct 2023 20:08:45 EDT
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# gpg: Good signature from "Yong Huang <yong.huang@smartx.com>" [unknown]
# gpg: WARNING: The key's User ID is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 685D 0220 DC26 4828 152E 57C2 DFF2 23D6 B3FE CB9C

* tag 'dirtylimit-dirtyrate-pull-request-20231010' of https://github.com/newfriday/qemu:
migration/dirtyrate: use QEMU_CLOCK_HOST to report start-time
migration/calc-dirty-rate: millisecond-granularity period

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

show more ...

migration/dirtyrate: use QEMU_CLOCK_HOST to report start-time

Currently query-dirty-rate uses QEMU_CLOCK_REALTIME as
the source for start-time field. This translates to
clock_gettime(CLOCK_MONOTONIC

migration/dirtyrate: use QEMU_CLOCK_HOST to report start-time

Currently query-dirty-rate uses QEMU_CLOCK_REALTIME as
the source for start-time field. This translates to
clock_gettime(CLOCK_MONOTONIC), i.e. number of seconds
since host boot. This is not very useful. The only
reasonable use case of start-time I can imagine is to
check whether previously completed measurements are
too old or not. But this makes sense only if start-time
is reported as host wall-clock time.

This patch replaces source of start-time from
QEMU_CLOCK_REALTIME to QEMU_CLOCK_HOST.

Signed-off-by: Andrei Gudkov <gudkov.andrei@huawei.com>
Reviewed-by: Hyman Huang <yong.huang@smartx.com>
Message-Id: <399861531e3b24a1ecea2ba453fb2c3d129fb03a.1693905328.git.gudkov.andrei@huawei.com>
Signed-off-by: Hyman Huang <yong.huang@smartx.com>

show more ...

migration/calc-dirty-rate: millisecond-granularity period

This patch allows to measure dirty page rate for
sub-second intervals of time. An optional argument is
introduced -- calc-time-unit. For exa

migration/calc-dirty-rate: millisecond-granularity period

This patch allows to measure dirty page rate for
sub-second intervals of time. An optional argument is
introduced -- calc-time-unit. For example:
{"execute": "calc-dirty-rate", "arguments":
{"calc-time": 500, "calc-time-unit": "millisecond"} }

Millisecond granularity allows to make predictions whether
migration will succeed or not. To do this, calculate dirty
rate with calc-time set to max allowed downtime (e.g. 300ms),
convert measured rate into volume of dirtied memory,
and divide by network throughput. If the value is lower
than max allowed downtime, then migration will converge.

Measurement results for single thread randomly writing to
a 1/4/24GiB memory region:

+----------------+-----------------------------------------------+
| calc-time | dirty rate MiB/s |
| (milliseconds) +----------------+---------------+--------------+
| | theoretical | page-sampling | dirty-bitmap |
| | (at 3M wr/sec) | | |
+----------------+----------------+---------------+--------------+
| 1GiB |
+----------------+----------------+---------------+--------------+
| 100 | 6996 | 7100 | 3192 |
| 200 | 4606 | 4660 | 2655 |
| 300 | 3305 | 3280 | 2371 |
| 400 | 2534 | 2525 | 2154 |
| 500 | 2041 | 2044 | 1871 |
| 750 | 1365 | 1341 | 1358 |
| 1000 | 1024 | 1052 | 1025 |
| 1500 | 683 | 678 | 684 |
| 2000 | 512 | 507 | 513 |
+----------------+----------------+---------------+--------------+
| 4GiB |
+----------------+----------------+---------------+--------------+
| 100 | 10232 | 8880 | 4070 |
| 200 | 8954 | 8049 | 3195 |
| 300 | 7889 | 7193 | 2881 |
| 400 | 6996 | 6530 | 2700 |
| 500 | 6245 | 5772 | 2312 |
| 750 | 4829 | 4586 | 2465 |
| 1000 | 3865 | 3780 | 2178 |
| 1500 | 2694 | 2633 | 2004 |
| 2000 | 2041 | 2031 | 1789 |
+----------------+----------------+---------------+--------------+
| 24GiB |
+----------------+----------------+---------------+--------------+
| 100 | 11495 | 8640 | 5597 |
| 200 | 11226 | 8616 | 3527 |
| 300 | 10965 | 8386 | 2355 |
| 400 | 10713 | 8370 | 2179 |
| 500 | 10469 | 8196 | 2098 |
| 750 | 9890 | 7885 | 2556 |
| 1000 | 9354 | 7506 | 2084 |
| 1500 | 8397 | 6944 | 2075 |
| 2000 | 7574 | 6402 | 2062 |
+----------------+----------------+---------------+--------------+

Theoretical values are computed according to the following formula:
size * (1 - (1-(4096/size))^(time*wps)) / (time * 2^20),
where size is in bytes, time is in seconds, and wps is number of
writes per second.

Signed-off-by: Andrei Gudkov <gudkov.andrei@huawei.com>
Reviewed-by: Hyman Huang <yong.huang@smartx.com>
Message-Id: <d802e6b8053eb60fbec1a784cf86f67d9528e0a8.1693895970.git.gudkov.andrei@huawei.com>
Signed-off-by: Hyman Huang <yong.huang@smartx.com>

show more ...

Merge tag 'dirtylimit-dirtyrate-pull-request' of https://github.com/newfriday/qemu into staging

Dirtylimit and dirtyrate 20230829 patches PULL request

Correct memory leaks in dirtylimit and accurac

Merge tag 'dirtylimit-dirtyrate-pull-request' of https://github.com/newfriday/qemu into staging

Dirtylimit and dirtyrate 20230829 patches PULL request

Correct memory leaks in dirtylimit and accuracy losses in
dirtyrate, respectively; make minor corrections to overshoot
and memory deallocation.

This is v3 with a signed tag. Please apply.

Thanks, Yong.

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* tag 'dirtylimit-dirtyrate-pull-request' of https://github.com/newfriday/qemu:
migration/dirtyrate: Fix precision losses and g_usleep overshoot
softmmu/dirtylimit: Convert free to g_free
softmmu: Fix dirtylimit memory leak

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

show more ...

migration/dirtyrate: Fix precision losses and g_usleep overshoot

Signed-off-by: Andrei Gudkov <gudkov.andrei@huawei.com>
Reviewed-by: Hyman Huang <yong.huang@smartx.com>
Message-Id: <8ddb0d40d143f77

migration/dirtyrate: Fix precision losses and g_usleep overshoot

Signed-off-by: Andrei Gudkov <gudkov.andrei@huawei.com>
Reviewed-by: Hyman Huang <yong.huang@smartx.com>
Message-Id: <8ddb0d40d143f77aab8f602bd494e01e5fa01614.1691161009.git.gudkov.andrei@huawei.com>
Signed-off-by: Hyman Huang <yong.huang@smartx.com>

show more ...

Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into staging

* kvm: enable dirty ring for arm64
* target/i386: new features
* target/i386: AVX fixes
* configure: create a python venv unc

Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into staging

* kvm: enable dirty ring for arm64
* target/i386: new features
* target/i386: AVX fixes
* configure: create a python venv unconditionally
* meson: bump to 0.63.0 and move tests from configure
* meson: Pass -j option to sphinx
* drop support for Python 3.6
* fix check-python-tox
* fix "make clean" in the source directory

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# gpg: Signature made Thu 18 May 2023 04:35:32 AM PDT
# gpg: using RSA key F13338574B662389866C7682BFFBD25F78C7AE83
# gpg: issuer "pbonzini@redhat.com"
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" [undefined]
# gpg: aka "Paolo Bonzini <pbonzini@redhat.com>" [undefined]
# gpg: WARNING: This key is not certified with a trusted signature!
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# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4 E2F7 7E15 100C CD36 69B1
# Subkey fingerprint: F133 3857 4B66 2389 866C 7682 BFFB D25F 78C7 AE83

* tag 'for-upstream' of https://gitlab.com/bonzini/qemu: (68 commits)
docs/devel: update build system docs
configure: remove unnecessary check
configure: reorder option parsing code
configure: remove unnecessary mkdir
configure: do not rerun the tests with -Werror
configure: remove compiler sanity check
build: move --disable-debug-info to meson
build: move compiler version check to meson
build: move remaining compiler flag tests to meson
build: move warning flag selection to meson
build: move stack protector flag selection to meson
build: move coroutine backend selection to meson
build: move SafeStack tests to meson
build: move sanitizer tests to meson
meson: prepare move of QEMU_CFLAGS to meson
configure, meson: move --enable-modules to Meson
configure: remove pkg-config functions
build: move glib detection and workarounds to meson
meson: drop unnecessary declare_dependency()
meson: add more version numbers to the summary
...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

show more ...

migration: Add last stage indicator to global dirty log

The global dirty log synchronization is used when KVM and dirty ring
are enabled. There is a particularity for ARM64 where the backup
bitmap i

migration: Add last stage indicator to global dirty log

The global dirty log synchronization is used when KVM and dirty ring
are enabled. There is a particularity for ARM64 where the backup
bitmap is used to track dirty pages in non-running-vcpu situations.
It means the dirty ring works with the combination of ring buffer
and backup bitmap. The dirty bits in the backup bitmap needs to
collected in the last stage of live migration.

In order to identify the last stage of live migration and pass it
down, an extra parameter is added to the relevant functions and
callbacks. This last stage indicator isn't used until the dirty
ring is enabled in the subsequent patches.

No functional change intended.

Signed-off-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Tested-by: Zhenyu Zhang <zhenyzha@redhat.com>
Message-Id: <20230509022122.20888-2-gshan@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

show more ...

Merge tag 'pull-request-2023-05-15v2' of https://gitlab.com/thuth/qemu into staging

* Various small test updates
* Some small doc updates
* Introduce replacement for -async-teardown that shows up in

Merge tag 'pull-request-2023-05-15v2' of https://gitlab.com/thuth/qemu into staging

* Various small test updates
* Some small doc updates
* Introduce replacement for -async-teardown that shows up in the QAPI
* Make machine-qmp-cmds.c and xilinx_ethlite.c target-independent
* Fix s390x LDER instruction
* Fix s390x EXECUTE instruction with relative branches

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# -----END PGP SIGNATURE-----
# gpg: Signature made Tue 16 May 2023 04:33:25 AM PDT
# gpg: using RSA key 27B88847EEE0250118F3EAB92ED9D774FE702DB5
# gpg: issuer "thuth@redhat.com"
# gpg: Good signature from "Thomas Huth <th.huth@gmx.de>" [undefined]
# gpg: aka "Thomas Huth <thuth@redhat.com>" [undefined]
# gpg: aka "Thomas Huth <th.huth@posteo.de>" [unknown]
# gpg: aka "Thomas Huth <huth@tuxfamily.org>" [undefined]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 27B8 8847 EEE0 2501 18F3 EAB9 2ED9 D774 FE70 2DB5

* tag 'pull-request-2023-05-15v2' of https://gitlab.com/thuth/qemu: (21 commits)
tests/tcg/s390x: Test EXECUTE of relative branches
target/s390x: Fix EXECUTE of relative branches
tests/tcg/s390x: Enable the multiarch system tests
tests/tcg/multiarch: Make the system memory test work on big-endian
s390x/tcg: Fix LDER instruction format
hw/net: Move xilinx_ethlite.c to the target-independent source set
hw/core: Move machine-qmp-cmds.c into the target independent source set
cpu: Introduce a wrapper for being able to use TARGET_NAME in common code
hw/core: Use a callback for target specific query-cpus-fast information
docs/about/emulation: fix typo
docs/devel: remind developers to run CI container pipeline when updating images
s390x/pv: Fix spurious warning with asynchronous teardown
util/async-teardown: wire up query-command-line-options
tests/lcitool: Add mtools and xorriso and remove genisoimage as dependencies
tests: libvirt-ci: Update to commit 'c8971e90ac' to pull in mformat and xorriso
Add information how to fix common build error on Windows in symlink-install-tree
hw/pci-bridge: Fix release ordering by embedding PCIBridgeWindows within PCIBridge
tests/qtest: replace qmp_discard_response with qtest_qmp_assert_success
net: stream: test reconnect option with an unix socket
sysemu/kvm: Remove unused headers
...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

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sysemu/kvm: Remove unused headers

All types used are forward-declared in "qemu/typedefs.h".

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20230405160454.97436-2-philmd@lina

sysemu/kvm: Remove unused headers

All types used are forward-declared in "qemu/typedefs.h".

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20230405160454.97436-2-philmd@linaro.org>
[thuth: Add hw/core/cpu.h to migration/dirtyrate.c to fix compile failure]
Signed-off-by: Thomas Huth <thuth@redhat.com>

show more ...