Exporting cpu on/offline and memory on/offline hotplug interfaces,
so that users can do those (memory/cpu) hotplug actions with
following command line freely:
usage: xen-hptool <command> [args]
xen-hptool command list:\n\n
cpu-online <cpuid> online CPU <cpuid>
cpu-offline <cpuid> offline CPU <cpuid>
mem-online <mfn> online MEMORY <mfn>
mem-offline <mfn> offline MEMORY <mfn>
mem-status <mfn> query Memory status<mfn>
Signed-off-by: Yunhong Jiang<yunhong.jiang@intel.com>
Signed-off-by: Liping Ke <liping.ke@intel.com>
Refactor the existing code that supports the Intel Turbo feature to
move all the driver specific bits in the cpufreq driver. Create
a tri-state interface for the Turbo feature that can distinguish
amongst enabled Turbo, disabled Turbo, and processors that don't
support Turbo at all.
Signed-off-by: Mark Langsdorf <mark.langsdorf@amd.com>
Add "page deduplication" capability (with optional compression
and trailing-zero elimination) to Xen's tmem.
(Transparent to tmem-enabled guests.) Ephemeral pages
that have the exact same content are "combined" so that only
one page frame is needed. Since ephemeral pages are essentially
read-only, no C-O-W (and thus no equivalent of swapping) is
necessary. Deduplication can be combined with compression
or "trailing zero elimination" for even more space savings.
Signed-off-by: Dan Magenheimer <dan.magenheimer@oracle.com>
F12 introduces a tool to automatically report bugs when there are core
dumps. Since xen-detect relies on fork+waitpid in order to trap a
SIGILL from a child, every time someone runs xen-detect on a bare
metal kernel a bug is reported into Red Hat's Bugzilla. :-)
However, even without this contingent need, leaving core dumps around
is not nice. So this patch just traps SIGILL using
signal/sentjmp/longjmp, without the need to fork.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
pygrub currently has a hardcoded path of /usr/bin/python which is not
correct if the version of python at install time is not the same as
that at build time. This patch uses the existing install-wrap and
python/get-path machinery.
(It does not address the currently-existing bug that the get-path
machinery works by assuming that `python' is a symlink, rather than
querying the python interpreter for its version.)
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
xenpm trace utility gtraceview cleanup
- add gtraceview help info on how to get raw data by xentrace
- make trace_exit_reason compiled in non-debug mode. trace_exit_reason
can be enable/disabled by xentrace at runtime, so no need to disable
it at build time.
Signed-off-by: Yu Ke <ke.yu@intel.com>
Attached patch introduces xenbackendd. It is used on NetBSD
to launch the hotplug scripts. Later xenbackendd can be improved to
also launch qemu-dm as child process and will notice when qemu-dm
crashes.
The changes the patch makes:
- rename hotplug scripts as xenbackendd expects them
(current names were taken from pkgsrc)
- install hotplug scripts as executable scripts
- introduce xenbackendd
- build/install/launch on NetBSD only
Signed-off-by: Christoph Egger <Christoph.Egger@amd.com>
Tmem can share clean page cache pages for Linux domains
in a virtual cluster (currently only the ocfs2 filesystem
has a patch on the Linux side). So when one domain
"puts" (evicts) a page, any domain in the cluster can
"get" it, thus saving disk reads. This functionality
is already present; these are only bug fixes.
- fix bugs when an SE pool is destroyed
- fixes in parsing tool for xm tmem-list output for SE pools
- incorrect locking in one case for destroying an SE pool
- clearer verbosity for transfer when an SE pool is destroyed
- minor cleanup: merge routines that are mostly duplicate
Signed-off-by: Dan Magenheimer <dan.magenheimer@oracle.com>
Tmem, when called from a tmem-capable (paravirtualized) guest, makes
use of otherwise unutilized ("fallow") memory to create and manage
pools of pages that can be accessed from the guest either as
"ephemeral" pages or as "persistent" pages. In either case, the pages
are not directly addressible by the guest, only copied to and fro via
the tmem interface. Ephemeral pages are a nice place for a guest to
put recently evicted clean pages that it might need again; these pages
can be reclaimed synchronously by Xen for other guests or other uses.
Persistent pages are a nice place for a guest to put "swap" pages to
avoid sending them to disk. These pages retain data as long as the
guest lives, but count against the guest memory allocation.
Tmem pages may optionally be compressed and, in certain cases, can be
shared between guests. Tmem also handles concurrency nicely and
provides limited QoS settings to combat malicious DoS attempts.
Save/restore and live migration support is not yet provided.
Tmem is primarily targeted for an x86 64-bit hypervisor. On a 32-bit
x86 hypervisor, it has limited functionality and testing due to
limitations of the xen heap. Nearly all of tmem is
architecture-independent; three routines remain to be ported to ia64
and it should work on that architecture too. It is also structured to
be portable to non-Xen environments.
Tmem defaults off (for now) and must be enabled with a "tmem" xen boot
option (and does nothing unless a tmem-capable guest is running). The
"tmem_compress" boot option enables compression which takes about 10x
more CPU but approximately doubles the number of pages that can be
stored.
Tmem can be controlled via several "xm" commands and many interesting
tmem statistics can be obtained. A README and internal specification
will follow, but lots of useful prose about tmem, as well as Linux
patches, can be found at http://oss.oracle.com/projects/tmem .
Signed-off-by: Dan Magenheimer <dan.magenheimer@oracle.com>
'SBDF' format is "[SEG#:]BUS#:DEV#.FUNC#"
ex) 0000:0a:1f.3
Device path format is "HID[:UID]-DEV#.FUNC#[-DEV#.FUNC#[...]]"
ex) PNP0A08:0-2.0-0.0
The command can be executed as follows.
# sbdf2devicepath 0a:1f.3
PNP0A08:0-2.0-0.0
Signed-off-by: Yuji Shimada <shimada-yxb@necst.nec.co.jp>
Previously, by default we would install our python modules into
/usr/lib/python/xen, for example /usr/lib/python/xen/__init__.py.
Upstream python's standard install location (a) includes the Python
version number and (b) puts things in site-packages by default.
Our best conjecture for the reason for this was an attempt to make the
installs portable between different python versions. However, that
doesn't work because compiled python modules (.pyc), and C python
extensions corresponding to one version of python, are not compatible
across different versions of python.
This is why upstream include the version number.
site-packages is the standard location for locally-installed packages
and is automatically included on the python search path.
In this change, we abandon our own unusual python path setup:
* Invoke setup.py in an entirely standard manner. We pass
PREFIX and DESTDIR using the appropriate options provided by
setup.py for those purposes (adding them to setup.py calls
which were previously lacking them).
* Since the installation locations are now on the standard
python path, we no longer need to add anything to the path
in any of our python utilities. Therefore remove all that
code from every python script. (Many of these scripts
unconditionally added /usr/lib/python and /usr/lib64/python which
is wrong even in the old world.)
* There is no longer any special `Xen python path'. xen-python-path
is no longer needed. It is no longer called by anything in our
tree. However since out-of-tree callers may still invoke it, we
retain it. It now prints a fixed string referring to a directory
which does not to exist; callers (who use it to augment their
python path) will thus add a nonexistent directory to their python
path which is harmless.
* Remove various workarounds including use of setup.py --home
(which is intended for something completely different).
* Remove tests for the XEN_PYTHON_NATIVE_INSTALL build-time
environment variable. The new behaviour is the behaviour which we
should have had if this variable had been set. That is, it is now
as if this variable was always set but also bugs in the resulting
install have been fixed.
This should be a proper fix for the bug addressed by c/s 19515.
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
'SBDF' format is "[SEG#:]BUS#:DEV#.FUNC#"
ex) 0000:0a:1f.3
Device path format is "HID[:UID]-DEV#.FUNC#[-DEV#.FUNC#[...]]"
ex) PNP0A08:0-2.0-0.0
The command can be executed as follows.
# device_path 0a:1f.3
PNP0A08:0-2.0-0.0
Signed-off-by: Yuji Shimada <shimada-yxb@necst.nec.co.jp>
Current scheduler only care performance, thus always picks pCPU from
the most idle package. This knob provides another option to pick pCPU from
least idle package, for user who want performance power balance.
Signed-off-by: Yu Ke <ke.yu@intel.com>
Signed-off-by: Tian Kevin <kevin.tian@intel.com>
CPU topology info is necessary for power management analysis. For
example, to analysis the effect of Px state coordination, Cx
package/core coordination, the thread/core/socket topology
information is needed.
This patch add new command "get-cpu-topology" in xenpm to print the
CPU topology info:
Signed-off-by: Yu Ke <ke.yu@intel.com>
If you use -MMD -MF then the correct .o filename is written to the
.*.d file as the compiler driver arranges everything. This was done
in 19010:275abe1c5d24 for the hypervisor.
In this patch we do the same elsewhere in the xen-unstable tree,
particularly tools/. Specifically:
* Change tools/Rules.mk to add -MMD -MF ... to CFLAGS and set DEPS.
* Remove -Wp,-MD... from every other Makefile
* Remove setting of DEPS from every other Makefile
* Ensure that every Makefile says -include $(DEPS)
* Ensure that every Makefile's clean target removes $(DEPS)
Some Makefiles were already halfway there, but often for a different
variable name eg PROG_DEP. The variable name is now standardised in
Rules.mk as DEPS.
I have done a test build with this change, on Debian etch.
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Two enhancements are made in this patch:
1. Make cpuid in command line optional: if user does not provide
cpuid, xenpm will operate on all the CPUs. this will easy the xenpm
usage. e.g. to set the cpufreq governor, user usually want to set the
governor on all CPUs. User can accomplish this easily with this
enhancement.
2. Add another option "xenpm start" to calculate the Cx/Px state
residency percentage during specified period. when user issue "xenpm
start", xenpm will start to record the Cx/Px state residency. when
user issue CTRL-C, xenpm will stop and show the Cx/Px state residency
and percentage of this period. this is helpful to measure the xenpm
effect for speficied workload.
Signed-off-by: Guanqun Lu <guanqun.lu@intel.com>Signed-off-by: Ke Yu <ke.yu@intel.com>
tune the parameters manually.
Now, xenpm can be invoked with the following options:
Usage:
xenpm get-cpuidle-states [cpuid]: list cpu idle information on
CPU cpuid or all CPUs.
xenpm get-cpufreq-states [cpuid]: list cpu frequency
information on CPU cpuid or all CPUs.
xenpm get-cpufreq-para [cpuid]: list cpu frequency information
on CPU cpuid or all CPUs.
xenpm set-scaling-maxfreq <cpuid> <HZ>: set max cpu frequency
<HZ> on CPU <cpuid>.
xenpm set-scaling-minfreq <cpuid> <HZ>: set min cpu frequency
<HZ> on CPU <cpuid>.
xenpm set-scaling-governor <cpuid> <name>: set scaling governor
on CPU <cpuid>.
xenpm set-scaling-speed <cpuid> <num>: set scaling speed on CPU
<cpuid>.
xenpm set-sampling-rate <cpuid> <num>: set sampling rate on CPU
<cpuid>.
xenpm set-up-threshold <cpuid> <num>: set up threshold on CPU
<cpuid>.
To ease the use of this tool, the shortcut option is supported,
i.e. `xenpm get-cpui' is equal to `xenpm get-cpuidle-states'.
Signed-off-by: Guanqun Lu <guanqun.lu@intel.com>
Keir Fraser