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2019-08-21qapi: Move query-target from misc.json to machine.jsonMarkus Armbruster1-11/+0
Move query-target and its return type TargetInfo from misc.json to machine.json, where they are covered by MAINTAINERS section "Machine core". Also move its implementation from arch_init.c to hw/core/machine-qmp-cmds, where it is likewise covered. All users of SysEmuTarget are now in machine.json. Move it there from common.json. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20190709152053.16670-3-armbru@redhat.com>
2019-06-12Include qemu-common.h exactly where neededMarkus Armbruster1-1/+0
No header includes qemu-common.h after this commit, as prescribed by qemu-common.h's file comment. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20190523143508.25387-5-armbru@redhat.com> [Rebased with conflicts resolved automatically, except for include/hw/arm/xlnx-zynqmp.h hw/arm/nrf51_soc.c hw/arm/msf2-soc.c block/qcow2-refcount.c block/qcow2-cluster.c block/qcow2-cache.c target/arm/cpu.h target/lm32/cpu.h target/m68k/cpu.h target/mips/cpu.h target/moxie/cpu.h target/nios2/cpu.h target/openrisc/cpu.h target/riscv/cpu.h target/tilegx/cpu.h target/tricore/cpu.h target/unicore32/cpu.h target/xtensa/cpu.h; bsd-user/main.c and net/tap-bsd.c fixed up]
2018-06-01arch_init: sort architecturesMichael S. Tsirkin1-8/+8
Sort alphabetically. Will help us see if anything is missing (e.g. tile is not there now). Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com>
2018-05-04qapi: change the type of TargetInfo.arch from string to enum SysEmuTargetLaszlo Ersek1-1/+3
Now that we have @SysEmuTarget, it makes sense to restrict @TargetInfo.@arch to valid sysemu targets at the schema level. Cc: "Daniel P. Berrange" <berrange@redhat.com> Cc: Eric Blake <eblake@redhat.com> Cc: Markus Armbruster <armbru@redhat.com> Signed-off-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20180427192852.15013-4-lersek@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2018-03-07RISC-V Build InfrastructureMichael Clark1-0/+2
This adds RISC-V into the build system enabling the following targets: - riscv32-softmmu - riscv64-softmmu - riscv32-linux-user - riscv64-linux-user This adds defaults configs for RISC-V, enables the build for the RISC-V CPU core, hardware, and Linux User Emulation. The 'qemu-binfmt-conf.sh' script is updated to add the RISC-V ELF magic. Expected checkpatch errors for consistency reasons: ERROR: line over 90 characters FILE: scripts/qemu-binfmt-conf.sh Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Sagar Karandikar <sagark@eecs.berkeley.edu> Signed-off-by: Michael Clark <mjc@sifive.com>
2018-03-02qapi: Empty out qapi-schema.jsonMarkus Armbruster1-1/+1
The previous commit improved compile time by including less of the generated QAPI headers. This is impossible for stuff defined directly in qapi-schema.json, because that ends up in headers that that pull in everything. Move everything but include directives from qapi-schema.json to new sub-module qapi/misc.json, then include just the "misc" shard where possible. It's possible everywhere, except: * monitor.c needs qmp-command.h to get qmp_init_marshal() * monitor.c, ui/vnc.c and the generated qapi-event-FOO.c need qapi-event.h to get enum QAPIEvent Perhaps we'll get rid of those some other day. Adding a type to qapi/migration.json now recompiles some 120 instead of 2300 out of 5100 objects. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20180211093607.27351-25-armbru@redhat.com> [eblake: rebase to master] Signed-off-by: Eric Blake <eblake@redhat.com>
2018-01-30target/hppa: Skeleton support for hppa-softmmuHelge Deller1-0/+2
With the addition of default-configs/hppa-softmmu.mak, this will compile. It is not enabled with this patch, however. Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2017-05-19audio: Rename hw/audio/audio.h to hw/audio/soundhw.hEduardo Habkost1-1/+1
All the functions in hw/audio/audio.h are called "soundhw_*()" and live in hw/audio/audiohw.c. Rename the header file for consistency. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Reviewed-by: Hervé Poussineau <hpoussin@reactos.org> Message-id: 20170508205735.23444-4-ehabkost@redhat.com Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2017-05-19audio: Move arch_init audio code to hw/audio/soundhw.cEduardo Habkost1-124/+0
There's no reason to keep the soundhw table in arch_init.c. Move that code to a new hw/audio/soundhw.c file. While moving the code, trivial coding style issues were fixed. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Reviewed-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-id: 20170508205735.23444-2-ehabkost@redhat.com Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2017-01-24nios2: Add support for Nios-II R1Marek Vasut1-0/+2
Add remaining bits of the Altera NiosII R1 support into qemu, which is documentation, MAINTAINERS file entry, configure bits, arch_init and configuration files for both linux-user (userland binaries) and softmmu (hardware emulation). Signed-off-by: Marek Vasut <marex@denx.de> Cc: Chris Wulff <crwulff@gmail.com> Cc: Jeff Da Silva <jdasilva@altera.com> Cc: Ley Foon Tan <lftan@altera.com> Cc: Sandra Loosemore <sandra@codesourcery.com> Cc: Yves Vandervennet <yvanderv@altera.com> Reviewed-by: Alexander Graf <agraf@suse.de> Message-Id: <20170118220146.489-8-marex@denx.de> Signed-off-by: Richard Henderson <rth@twiddle.net>
2017-01-23arch_init: Remove unnecessary default_config_files tableEduardo Habkost1-27/+0
The existing default_config_files table in arch_init.c has a single entry, making it completely unnecessary. The whole code can be replaced by a single qemu_read_config_file() call in vl.c. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Message-Id: <20170117180051.11958-1-ehabkost@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2017-01-16acpi: filter based on CONFIG_ACPI_X86 rather than TARGETPaolo Bonzini1-13/+0
Copy the mechanism of hw/smbios/smbios-stub.c to implement an ACPI-stub instead, so that -acpitable can be later extended to ARM. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-01-16smbios: filter based on CONFIG_SMBIOS rather than TARGETLeif Lindholm1-8/+0
-smbios command line options were accepted but silently ignored on TARGET_ARM, due to a test for TARGET_I386 in arch_init.c. Copy the mechanism of hw/pci/pci-stub.c to implement an smbios-stub instead, enabled for all targets without CONFIG_SMBIOS. Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org> Message-Id: <20161222151828.28292-1-leif.lindholm@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-09-23util: Add UUID APIFam Zheng1-19/+0
A number of different places across the code base use CONFIG_UUID. Some of them are soft dependency, some are not built if libuuid is not available, some come with dummy fallback, some throws runtime error. It is hard to maintain, and hard to reason for users. Since UUID is a simple standard with only a small number of operations, it is cleaner to have a central support in libqemuutil. This patch adds qemu_uuid_* functions that all uuid users in the code base can rely on. Except for qemu_uuid_generate which is new code, all other functions are just copy from existing fallbacks from other files. Note that qemu_uuid_parse is moved without updating the function signature to use QemuUUID, to keep this patch simple. Signed-off-by: Fam Zheng <famz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Jeff Cody <jcody@redhat.com> Message-Id: <1474432046-325-2-git-send-email-famz@redhat.com>
2016-05-23cpu: Eliminate cpudef_init(), cpudef_setup()Eduardo Habkost1-7/+0
x86_cpudef_init() doesn't do anything anymore, cpudef_init(), cpudef_setup(), and x86_cpudef_init() can be finally removed. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2016-05-19qemu-common: push cpu.h inclusion out of qemu-common.hPaolo Bonzini1-0/+2
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-03-22util: move declarations out of qemu-common.hVeronia Bahaa1-0/+1
Move declarations out of qemu-common.h for functions declared in utils/ files: e.g. include/qemu/path.h for utils/path.c. Move inline functions out of qemu-common.h and into new files (e.g. include/qemu/bcd.h) Signed-off-by: Veronia Bahaa <veroniabahaa@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-02-04all: Clean up includesPeter Maydell1-1/+1
Clean up includes so that osdep.h is included first and headers which it implies are not included manually. This commit was created with scripts/clean-includes. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 1454089805-5470-16-git-send-email-peter.maydell@linaro.org
2016-01-13error: Use error_reportf_err() where it makes obvious senseMarkus Armbruster1-3/+1
Done with this Coccinelle semantic patch @@ expression FMT, E, S; expression list ARGS; @@ - error_report(FMT, ARGS, error_get_pretty(E)); + error_reportf_err(E, FMT/*@@@*/, ARGS); ( - error_free(E); | exit(S); | abort(); ) followed by a replace of '%s"/*@@@*/' by '"' and some line rewrapping, because I can't figure out how to make Coccinelle transform strings. We now use the error whole instead of just its message obtained with error_get_pretty(). This avoids suppressing its hint (see commit 50b7b00), but I can't see how the errors touched in this commit could come with hints. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <1450452927-8346-12-git-send-email-armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2015-08-13smbios: move smbios code into a common folderWei Huang1-1/+1
To share smbios among different architectures, this patch moves SMBIOS code (smbios.c and smbios.h) from x86 specific folders into new hw/smbios directories. As a result, CONFIG_SMBIOS=y is defined in x86 default config files. Acked-by: Gabriel Somlo <somlo@cmu.edu> Tested-by: Gabriel Somlo <somlo@cmu.edu> Reviewed-by: Laszlo Ersek <lersek@redhat.com> Tested-by: Leif Lindholm <leif.lindholm@linaro.org> Signed-off-by: Wei Huang <wei@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2015-06-12migration: reduce include filesJuan Quintela1-23/+0
To make changes easier, with the copy, I maintained almost all include files. Now I remove the unnecessary ones on this patch. This compiles on linux x64 with all architectures configured, and cross-compiles for windows 32 and 64 bits. Signed-off-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2015-06-12migration: move ram stuff to migration/ramJuan Quintela1-1588/+0
For historic reasons, ram migration have been on arch_init.c. Just split it into migration/ram.c, the same that happened with block.c. There is only code movement, no changes altogether. Signed-off-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2015-06-05migration: move dirty bitmap sync to ram_addr.hStefan Hajnoczi1-44/+2
The dirty memory bitmap is managed by ram_addr.h and copied to migration_bitmap[] periodically during live migration. Move the code to sync the bitmap to ram_addr.h where related code lives. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Message-Id: <1417519399-3166-5-git-send-email-stefanha@redhat.com> Reviewed-by: Fam Zheng <famz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-06-02arch_init: Drop target-x86_64.confIkey Doherty1-1/+0
The target-x86_64.conf sysconfig file has been empty and essentially ignored now for several years. This change removes the unused file to enable moving towards a stateless configuration. Signed-off-by: Ikey Doherty <michael.i.doherty@intel.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2015-05-07migration: Fix migration state update issueLiang Li1-1/+1
If live migration is very fast and can be completed in 1 second, the dirty_sync_count of MigrationState will not be updated. Then you will see "dirty sync count: 0" in qemu monitor even if the actual dirty sync count is not 0. Signed-off-by: Liang Li <liang.z.li@intel.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Dr.David Alan Gilbert <dgilbert@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
2015-05-07migration: avoid divide by zero in xbzrle cache miss rateMichael Chapman1-3/+5
This bug manifested itself as a VM that could not be resumed by libvirt following a migration: # virsh resume example error: Failed to resume domain example error: internal error: cannot parse json {"return": {"xbzrle-cache": {..., "cache-miss-rate": -nan, ...}, ... } }: lexical error: malformed number, a digit is required after the minus sign. This patch also ensures xbzrle_cache_miss_prev and iterations_prev are cleared at the start of the migration. Signed-off-by: Michael Chapman <mike@very.puzzling.org> Reviewed-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
2015-05-07migration: Add the core code for decompressionLiang Li1-2/+48
Implement the core logic of multiple thread decompression, the decompression can work now. Signed-off-by: Liang Li <liang.z.li@intel.com> Signed-off-by: Yang Zhang <yang.z.zhang@intel.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
2015-05-07migration: Make compression co-work with xbzrleLiang Li1-1/+11
Now, multiple thread compression can co-work with xbzrle. when xbzrle is on, multiple thread compression will only work at the first round of RAM data sync. Signed-off-by: Liang Li <liang.z.li@intel.com> Signed-off-by: Yang Zhang <yang.z.zhang@intel.com> Reviewed-by: Dr.David Alan Gilbert <dgilbert@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
2015-05-07migration: Add the core code of multi-thread compressionLiang Li1-7/+178
Implement the core logic of the multiple thread compression. At this point, multiple thread compression can't co-work with xbzrle yet. Signed-off-by: Liang Li <liang.z.li@intel.com> Signed-off-by: Yang Zhang <yang.z.zhang@intel.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
2015-05-06migration: Split save_zero_page from ram_save_pageLiang Li1-18/+43
Split the function save_zero_page from ram_save_page so that we can reuse it later. Signed-off-by: Liang Li <liang.z.li@intel.com> Signed-off-by: Yang Zhang <yang.z.zhang@intel.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
2015-05-06arch_init: Add and free data struct for decompressionLiang Li1-1/+12
Define the data structure and variables used to do multiple thread decompression, and add the code to initialize and free them. Signed-off-by: Liang Li <liang.z.li@intel.com> Signed-off-by: Yang Zhang <yang.z.zhang@intel.com> Reviewed-by: Dr.David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
2015-05-06arch_init: Alloc and free data struct for compressionLiang Li1-1/+34
Define the data structure and variables used to do multiple thread compression, and add the code to initialize and free them. Signed-off-by: Liang Li <liang.z.li@intel.com> Signed-off-by: Yang Zhang <yang.z.zhang@intel.com> Reviewed-by: Dr.David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
2015-05-06migration: Add the framework of multi-thread decompressionLiang Li1-0/+77
Add the code to create and destroy the multiple threads those will be used to do data decompression. Left some functions empty just to keep clearness, and the code will be added later. Signed-off-by: Liang Li <liang.z.li@intel.com> Signed-off-by: Yang Zhang <yang.z.zhang@intel.com> Reviewed-by: Dr.David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
2015-05-06migration: Add the framework of multi-thread compressionLiang Li1-2/+92
Add the code to create and destroy the multiple threads those will be used to do data compression. Left some functions empty to keep clearness, and the code will be added later. Signed-off-by: Liang Li <liang.z.li@intel.com> Signed-off-by: Yang Zhang <yang.z.zhang@intel.com> Reviewed-by: Dr.David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
2015-03-26migration: remove last_sent_block from save_page_headerJuan Quintela1-6/+6
Compression code (still not on tree) want to call this funtion from outside the migration thread, so we can't write to last_sent_block. Instead of reverting full patch: [PULL 07/11] save_block_hdr: we can recalculate Just revert the parts that touch last_sent_block. Signed-off-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2015-03-17arch_init: Count the total number of pages by using helper functionzhanghailiang1-7/+1
There is already a helper function ram_bytes_total(), we can use it to help counting the total number of pages used by ram blocks. Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
2015-03-16rename save_block_hdr to save_page_headerJuan Quintela1-8/+19
It has always been a page header, not a block header. Once there, the flag argument was only passed to make a bit or with it, just do the or on the caller. Signed-off-by: Juan Quintela <quintela@redhat.com>
2015-03-16save_block_hdr: we can recalculate the cont parameter hereJuan Quintela1-23/+24
No need to pass it through all the callers. Once there, update last_sent_block here. Signed-off-by: Juan Quintela <quintela@redhat.com>
2015-03-16save_xbzrle_page: change calling conventionJuan Quintela1-19/+25
Add a parameter to pass the number of bytes written, and make it return the number of pages written instead. Signed-off-by: Juan Quintela <quintela@redhat.com>
2015-03-16ram_save_page: change calling coventionJuan Quintela1-19/+38
Add a parameter to pass the number of bytes written, and make it return the number of pages written instead. Signed-off-by: Juan Quintela <quintela@redhat.com>
2015-03-16ram_find_and_save_block: change calling conventionJuan Quintela1-22/+23
Add a parameter to pass the number of bytes written, and make it return the number of pages written instead. Signed-off-by: Juan Quintela <quintela@redhat.com>
2015-03-16ram: make all save_page functions take a uint64_t parameterJuan Quintela1-3/+8
It used to be an int, but then we can't pass directly the bytes_transferred parameter, that would happen later in the series. Signed-off-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Amit Shah <amit.shah@redhat.com>
2015-02-26Merge remote-tracking branch 'remotes/armbru/tags/pull-error-2015-02-18' ↵Peter Maydell1-2/+1
into staging Clean up around error_get_pretty(), qerror_report_err() # gpg: Signature made Wed Feb 18 10:10:07 2015 GMT using RSA key ID EB918653 # gpg: Good signature from "Markus Armbruster <armbru@redhat.com>" # gpg: aka "Markus Armbruster <armbru@pond.sub.org>" * remotes/armbru/tags/pull-error-2015-02-18: qemu-char: Avoid qerror_report_err() outside QMP command handlers qemu-img: Avoid qerror_report_err() outside QMP command handlers vl: Avoid qerror_report_err() outside QMP command handlers tpm: Avoid qerror_report_err() outside QMP command handlers numa: Avoid qerror_report_err() outside QMP command handlers net: Avoid qerror_report_err() outside QMP command handlers monitor: Avoid qerror_report_err() outside QMP command handlers monitor: Clean up around monitor_handle_fd_param() error: Use error_report_err() where appropriate error: New convenience function error_report_err() vhost-scsi: Improve error reporting for invalid vhostfd Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-02-18error: Use error_report_err() where appropriateMarkus Armbruster1-2/+1
Coccinelle semantic patch: @@ expression E; @@ - error_report("%s", error_get_pretty(E)); - error_free(E); + error_report_err(E); @@ expression E, S; @@ - error_report("%s", error_get_pretty(E)); + error_report_err(E); ( exit(S); | abort(); ) Trivial manual touch-ups in block/sheepdog.c. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2015-02-16Convert ram_list to RCUMike Day1-18/+47
Allow "unlocked" reads of the ram_list by using an RCU-enabled QLIST. The ramlist mutex is kept. call_rcu callbacks are run with the iothread lock taken, but that may change in the future. Writers still take the ramlist mutex, but they no longer need to assume that the iothread lock is taken. Readers of the list, instead, no longer require either the iothread or ramlist mutex, but they need to use rcu_read_lock() and rcu_read_unlock(). One place in arch_init.c was downgrading from write side to read side like this: qemu_mutex_lock_iothread() qemu_mutex_lock_ramlist() ... qemu_mutex_unlock_iothread() ... qemu_mutex_unlock_ramlist() and the equivalent idiom is: qemu_mutex_lock_ramlist() rcu_read_lock() ... qemu_mutex_unlock_ramlist() ... rcu_read_unlock() Reviewed-by: Fam Zheng <famz@redhat.com> Signed-off-by: Mike Day <ncmike@ncultra.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-02-16exec: convert ram_list to QLISTMike Day1-9/+10
QLIST has RCU-friendly primitives, so switch to it. Reviewed-by: Fam Zheng <famz@redhat.com> Signed-off-by: Mike Day <ncmike@ncultra.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-02-16cosmetic changes preparing for the following patchesMike Day1-5/+4
Reviewed-by: Fam Zheng <famz@redhat.com> Signed-off-by: Mike Day <ncmike@ncultra.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-01-15xbzrle: optimize XBZRLE to decrease the cache missesChenLiang1-3/+5
Avoid hot pages being replaced by others to remarkably decrease cache misses Sample results with the test program which quote from xbzrle.txt ran in vm:(migrate bandwidth:1GE and xbzrle cache size 8MB) the test program: include <stdlib.h> include <stdio.h> int main() { char *buf = (char *) calloc(4096, 4096); while (1) { int i; for (i = 0; i < 4096 * 4; i++) { buf[i * 4096 / 4]++; } printf("."); } } before this patch: virsh qemu-monitor-command test_vm '{"execute": "query-migrate"}' {"return":{"expected-downtime":1020,"xbzrle-cache":{"bytes":1108284, "cache-size":8388608,"cache-miss-rate":0.987013,"pages":18297,"overflow":8, "cache-miss":1228737},"status":"active","setup-time":10,"total-time":52398, "ram":{"total":12466991104,"remaining":1695744,"mbps":935.559472, "transferred":5780760580,"dirty-sync-counter":271,"duplicate":2878530, "dirty-pages-rate":29130,"skipped":0,"normal-bytes":5748592640, "normal":1403465}},"id":"libvirt-706"} 18k pages sent compressed in 52 seconds. cache-miss-rate is 98.7%, totally miss. after optimizing: virsh qemu-monitor-command test_vm '{"execute": "query-migrate"}' {"return":{"expected-downtime":2054,"xbzrle-cache":{"bytes":5066763, "cache-size":8388608,"cache-miss-rate":0.485924,"pages":194823,"overflow":0, "cache-miss":210653},"status":"active","setup-time":11,"total-time":18729, "ram":{"total":12466991104,"remaining":3895296,"mbps":937.663549, "transferred":1615042219,"dirty-sync-counter":98,"duplicate":2869840, "dirty-pages-rate":58781,"skipped":0,"normal-bytes":1588404224, "normal":387794}},"id":"libvirt-266"} 194k pages sent compressed in 18 seconds. The value of cache-miss-rate decrease to 48.59%. Signed-off-by: ChenLiang <chenliang88@huawei.com> Signed-off-by: Gonglei <arei.gonglei@huawei.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Amit Shah <amit.shah@redhat.com>
2015-01-08arch_init: support resizing on incoming migrationMichael S. Tsirkin1-5/+8
If block used_length does not match, try to resize it. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
2015-01-08exec: split length -> used_length/max_lengthMichael S. Tsirkin1-9/+10
This patch allows us to distinguish between two length values for each block: max_length - length of memory block that was allocated used_length - length of block used by QEMU/guest Currently, we set used_length - max_length, unconditionally. Follow-up patches allow used_length <= max_length. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
generated by cgit v1.1 at 2024-12-28 11:04:25 +0000