Skip to content

Q
qemu

openeuler / qemu

通知 10
Star 0
Fork 0
Q
qemu
切换分支/标签
  1. 03 2月, 2016 4 次提交
  3. 07 1月, 2016 2 次提交
    • S
      trace: add make dependencies on tracetool source · cef517ca
      由 Stefan Hajnoczi 提交于 
      Patches that change tracetool can break the build if old build output
files are lying around.

This happens because the Makefile does not specify dependencies on
tracetool.  The build will use old object files that do not match the
current source code.
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
      cef517ca
    • S
      trace: fix make foo-timestamp rules · 9967e4fe
      由 Stefan Hajnoczi 提交于 
      The Makefile uses intermediate timestamp files to avoid rebuilding if
tracetool output is unchanged.

Timestamps are implemented incorrectly.  This was fixed for rules.mak in
commit 4b25966a ("rules.mak: cleanup
config generation rules") but never fixed in trace/Makefile.objs.

The problem with the old timestamp implementation was that make doesn't
notice the updated file modification time until the next time it is run.
It was necessary to run make twice in a row to achieve a full rebuild.
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
      9967e4fe
  5. 30 11月, 2015 1 次提交
    • S
      trace/simple: Fix warning and wrong trace file name for MinGW · 857a0e38
      由 Stefan Weil 提交于 
      On Windows, getpid() always returns an int value, but pid_t (which is
expected by the format string) is either a 32 bit or a 64 bit value.

Without a type cast (or a modified format string), the compiler prints
a warning when building for 64 bit Windows and the resulting trace_file_name
will include a wrong pid:

trace/simple.c:332:9: warning:
 format ‘%lld’ expects argument of type ‘long long int’,
 but argument 2 has type ‘int’ [-Wformat=]
Signed-off-by: NStefan Weil <sw@weilnetz.de>
      857a0e38
  7. 10 3月, 2015 1 次提交
  9. 26 9月, 2014 2 次提交
  11. 09 9月, 2014 1 次提交
  13. 12 8月, 2014 4 次提交
  15. 10 6月, 2014 1 次提交
    • M
      glib-compat.h: add new thread API emulation on top of pre-2.31 API · 86946a2d
      由 Michael Tokarev 提交于 
      Thread API changed in glib-2.31 significantly.  Before that version,
conditionals and mutexes were only allocated dynamically, using
_new()/_free() interface.  in 2.31 and up, they're allocated statically
as regular variables, and old interface is deprecated.

(Note: glib docs says the new interface is available since version
2.32, but it was actually introduced in version 2.31).

Create the new interface using old primitives, by providing non-opaque
definitions of the base types (GCond and GMutex) using GOnces.

Replace #ifdeffery around GCond and GMutex in trace/simple.c and
coroutine-gthread.c too because it does not work anymore with the new
glib-compat.h.
Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>
Reviewed-by: NStefan Hajnoczi <stefanha@redhat.com>
[Use GOnce to support lazy initialization; introduce CompatGMutex
 and CompatGCond.  - Paolo]
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
      86946a2d
  17. 09 6月, 2014 4 次提交
  19. 08 5月, 2014 2 次提交
  21. 25 3月, 2014 1 次提交
    • S
      osdep: initialize glib threads in all QEMU tools · ae2990c2
      由 Stefan Hajnoczi 提交于 
      glib versions prior to 2.31.0 require an explicit g_thread_init() call
to enable multi-threading.

Failure to initialize threading causes glib to take single-threaded code
paths without synchronization.  For example, the g_slice allocator will
crash due to race conditions.

Fix this for all QEMU tool programs (qemu-nbd, qemu-io, qemu-img) by
moving the g_thread_init() call from vl.c:main() into a new
osdep.c:thread_init() constructor function.

thread_init() has __attribute__((constructor)) and is automatically
invoked by the runtime during startup.

We can now drop the "simple" trace backend's g_thread_init() call since
thread_init() already called it.

Note that we must keep coroutine-gthread.c's g_thread_init() call which
is located in a constructor function.  There is no guarantee for
constructor function ordering so thread_init() may only be called later.
Reported-by: NMario de Chenno <mario.dechenno@unina2.it>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
      ae2990c2
  23. 12 3月, 2014 1 次提交
  25. 19 2月, 2014 1 次提交
  27. 27 1月, 2014 2 次提交
  29. 03 5月, 2013 1 次提交
    • E
      trace: Add ftrace tracing backend · 781e9545
      由 Eiichi Tsukata 提交于 
      This patch adds a ftrace tracing backend which sends trace event to
ftrace marker file. You can effectively compare qemu trace data and
kernel(especially, kvm.ko when using KVM) trace data.
The ftrace backend is restricted to Linux only.

To try out the ftrace backend:

 $ ./configure --trace-backend=ftrace
 $ make

if you use KVM, enable kvm events in ftrace:

 # sudo echo 1 > /sys/kernel/debug/tracing/events/kvm/enable

After running qemu by root user, you can get the trace:

 # cat /sys/kernel/debug/tracing/trace
Signed-off-by: NEiichi Tsukata <eiichi.tsukata.xh@hitachi.com>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
      781e9545
  31. 28 3月, 2013 6 次提交
  33. 13 2月, 2013 2 次提交
  35. 06 2月, 2013 3 次提交
  37. 30 1月, 2013 1 次提交