The average is calculated over the period of time from the last
xenpm report of the average CPU frequency.
Reporting the average CPU frequency helps confirm the level of turbo
boost being achieved per CPU.
Signed-off-by: Malcolm Crossley <malcolm.crossley@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
As recommended in http://www.gnu.org/licenses/gpl-howto.en.html.
This is the result of:
$ git grep -El Mass\|Temple\|Franklin | xargs ./fsf.pl
Where fsf.pl is:
#!/usr/bin/perl -w -pi.bak -0777
my $repl = 'If not, see <http://www.gnu.org/licenses/>.';
my $br = qr/(?:\s*\n\s*(?:[\*\#]|\/\/|\.\\" )?\s*|\s+)/;
my $inwt = qr/[Ii]f${br}not,${br}write${br}(?:to${br})?the${br}Free${br}Software${br}Foundation,(?:${br}Inc\.,)?/;
my $mass = qr/675${br}Mass${br}Ave,?${br}Cambridge,?${br}MA${br}02139,?${br}USA,?\.?/;
my $franklin = qr/51${br}Franklin${br}St(?:reet)?(?:,${br}| - )Fifth${br}Floor,?${br}Boston,?${br}MA,?${br}02110-1301,?${br}USA,?\.?/;
my $temple = qr/59${br}Temple${br}Place(?:,${br}| - )Suite${br}330,?${br}Boston,?${br}MA,?${br}021110?-1307,?${br}USA,?\.?/;
s|$inwt$br$mass|$repl|m;
s|$inwt$br$franklin|$repl|m;
s|$inwt$br$temple|$repl|m;
The only remaining mentions of these addresses are in COPYING files which I
haven't touched.
Some of the changed files are imports from elsewhere, however
filtering them out is tricky, I think it is tolerable to have these
files be modified here and then perhaps reverted on the next sync,
since it's only 1-2 lines and obvious what is going on.
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Commit 250f0b43af ("libxl/libxc: Move libxl_get_cpu_topology()'s
hypercall buffer management to libxc") broke non-debug compilation:
on error path we may have uninitialized cputopo pointer.
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reported-by: Olaf Hering <olaf@aepfle.de>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
xc_cputopoinfo() is not expected to be used on a hot path and therefore
hypercall buffer management can be pushed into libxc. This will simplify
life for callers.
Also update error reporting macros.
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
A number of changes to XEN_SYSCTL_topologyinfo interface:
* Instead of copying data for each field in xen_sysctl_topologyinfo separately
put cpu/socket/node into a single structure and do a single copy for each
processor.
* A NULL cputopo handle passed is a request for maximum number of CPUs
(num_cpus). If cputopo is valid and num_cpus is smaller than the number of
CPUs in the system then -ENOBUFS is returned (and correct num_cpus is provided)
* Do not use max_cpu_index, which is almost always used for calculating number
CPUs (thus requiring adding or subtracting one), replace it with num_cpus.
* There is no need to copy whole op in sysctl to user at the end, we only need
num_cpus.
* Rename xen_sysctl_topologyinfo and XEN_SYSCTL_topologyinfo to reflect the fact
that these are used for CPU topology. Subsequent patch will add support for
PCI topology sysctl.
* Replace INVALID_TOPOLOGY_ID with "XEN_"-prefixed macros for each invalid type
(core, socket, node).
Update sysctl version to 0x0000000C
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
With the number of these growing it becomes increasingly desirable to
not repeatedly alter the sysctl interface to accommodate them. Replace
the explicit listing of numbered states by arrays, unused fields of
which will remain untouched by the hypercall.
The adjusted sysctl interface at once fixes an unrelated shortcoming
of the original one: The "nr" field, specifying the size of the
"triggers" and "residencies" arrays, has to be an input (along with
being an output), which the previous implementation didn't obey to.
Note that the bouncing direction in the libxc interface at once gets
corrected to OUT (was BOTH).
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Acked-by: Keir Fraser <keir@xen.org>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Kevin Tian <kevin.tian@intel.com>
Currently cpufreq and xenpm are out of sync. Fix cpufreq reporting of
if turbo mode is enabled or not. Fix xenpm to not decode for tristate,
but a boolean.
Signed-off-by: Jacob Shin <jacob.shin@amd.com>
Specifically, what values are or aren't accepted as CPU identifier, and
how the values get interpreted should be consistent across sub-commands
(intended behavior now: non-negative values are okay, and along with
omitting the argument, specifying "all" will also be accepted).
For error handling, error messages should get consistently issued to
stderr, and the tool should now (hopefully) produce an exit code of
zero only in the (partial) success case (there may still be a small
number of questionable cases).
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Keir Fraser <keir@xen.org>
If CPU stays in the same idle state for the full duration of
xenpm sample then average residency may not be reported correctly
since usage counter will not be incremented.
In addition, in order to calculate averages correctly residence
time and usage counter should be read and written atomically.
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@amd.com>
Committed-by: Keir Fraser <keir@xen.org>
Idle state residence times as provided by pmstat_get_cx_stat() are not
reported precisely since remote core may be in idle state and
therefore has not updated its statistics at the time local core
collected them. This causes C0 residencies as calculated by xenpm to
sometimes become negative.
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@amd.com>
Committed-by: Keir Fraser <keir@xen.org>
- use consistent error values (stop mixing of [positive] errno values
with literal -E... ones)
- properly format output
- don't use leading zeros in decimal output
- move printing of average frequency into P-state conditional (rather
than a C-state one)
- don't print some C-state related info when CPU idle management is
disabled in the hypervisor
- use calloc() for array allocations that also got cleared via memset()
so far
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
Sandy bridge introduces new MSR to get cc7/pc2 residency (core C-state
7/package C-state 2). Print the cc7/pc2 residency when on sandy bridge
platform.
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Committed-by: Keir Fraser <keir@xen.org>
According to Intel 64 and IA32 Architectures SDM 3B Appendix B, Intel
Nehalem/Westmere processors provide h/w MSR to report the core/package
cstate residencies.Extend sysctl_get_pmstat interface to pass the
core/package cstate residencies, and modify xenpm to output those
information.
[tools part of the patch]
Signed-off-by: Wei Gang <gang.wei@intel.com>
This patch eliminate the global variables in libxenctrl (used for
logging and error reporting).
Instead the information which was in the global variables is now in a
new xc_interface* opaque structure, which xc_interface open returns
instead of the raw file descriptor; furthermore, logging is done via
xentoollog.
There are three new parameters to xc_interface_open to control the
logging, but existing callers can just pass "0" for all three to get
the old behaviour.
All libxc callers have been adjusted accordingly.
Also update QEMU_TAG for corresponding qemu change.
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Using the CPU number to compare with an index into an array containing
only a subset of CPUs isn't valid. And indicator isn't necessary here
at all since the CPU number being dealt with gets printed right before
this line.
Signed-off-by: Jan Beulich <jbeulich@novell.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>
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>
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>
Malcolm Crossley
Ian Campbell
Andrew Cooper
Boris Ostrovsky
Jan Beulich
Jacob Shin
Boris Ostrovsky
Yang Zhang
Kevin Tian
Ian Jackson
Keir Fraser