On platforms with C8-C10 support, the additional C-states cause
turbostat to overrun its output buffer of 128 bytes per CPU. Increase
this to 256 bytes per CPU.
[ As a bugfix, this should go into 3.10; however, since the C8-C10
support didn't go in until after 3.9, this need not go into any stable
kernel. ]
Signed-off-by: Josh Triplett <josh@joshtriplett.org>
Cc: Len Brown <len.brown@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Display residency in the new C-states, C8, C9, C10.
C8, C9, C10 are present on some:
"Fourth Generation Intel(R) Core(TM) Processors",
which are based on Intel(R) microarchitecture code name Haswell.
Signed-off-by: Kristen Carlson Accardi <kristen@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
The SMI counter is popular -- so display it by default
rather than requiring an option. What the heck,
we've blown the 80 column budget on many systems already...
Note that the value displayed is the delta
during the measurement interval.
The absolute value of the counter can still be seen with
the generic 32-bit MSR option, ie. -m 0x34
Signed-off-by: Len Brown <len.brown@intel.com>
When verbose is enabled, print the C1E-Enable
bit in MSR_IA32_POWER_CTL.
also delete some redundant tests on the verbose variable.
Signed-off-by: Len Brown <len.brown@intel.com>
This patch enables turbostat to run properly on the
next-generation Intel(R) Microarchitecture, code named "Haswell" (HSW).
HSW supports the BCLK and counters found in SNB.
Signed-off-by: Len Brown <len.brown@intel.com>
Pull powertool update from Len Brown:
"This updates the tree w/ the latest version of turbostat, which
reports temperature and - on SNB and later - Watts."
Fix up semantic merge conflict as per Len.
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux:
tools: Allow tools to be installed in a user specified location
tools/power: turbostat: make Makefile a bit more capable
tools/power x86_energy_perf_policy: close /proc/stat in for_every_cpu()
tools/power turbostat: v3.0: monitor Watts and Temperature
tools/power turbostat: fix output buffering issue
tools/power turbostat: prevent infinite loop on migration error path
x86 power: define RAPL MSRs
tools/power/x86/turbostat: share kernel MSR #defines
When building x86_energy_perf_policy or turbostat within the confines of
a packaging system such as RPM, we need to be able to have it install to
the buildroot and not the root filesystem of the build machine. This
adds a DESTDIR variable that when set will act as a prefix for the
install location of these tools.
Signed-off-by: Josh Boyer <jwboyer@redhat.com>
Signed-off-by: Len Brown <len.brown@intel.com>
The turbostat Makefile is pretty simple, its output is placed in the
same directory as the source, the install rule has no concept of a
prefix or sysroot, and you can set CC to use a specific compiler but
not use the more familiar CROSS_COMPILE. By making a few minor changes
these limitations are removed while leaving the default behavior
matching what it used to be.
Example build with these changes:
make CROSS_COMPILE=i686-wrs-linux-gnu- DESTDIR=/tmp install
or from the tools directory
make CROSS_COMPILE=i686-wrs-linux-gnu- DESTDIR=/tmp turbostat_install
Signed-off-by: Mark Asselstine <mark.asselstine@windriver.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Instead of returning out of for_every_cpu() we should break out of the loop=
which will then tidy up correctly by closing the file /proc/stat.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Show power in Watts and temperature in Celsius
when hardware support is present.
Intel's Sandy Bridge and Ivy Bridge processor generations support RAPL
(Run-Time-Average-Power-Limiting). Per the Intel SDM
(Intel® 64 and IA-32 Architectures Software Developer Manual)
RAPL provides hardware energy counters and power control MSRs
(Model Specific Registers). RAPL MSRs are designed primarily
as a method to implement power capping. However, they are useful
for monitoring system power whether or not power capping is used.
In addition, Turbostat now shows temperature from DTS
(Digital Thermal Sensor) and PTM (Package Thermal Monitor) hardware,
if present.
As before, turbostat reads MSRs, and never writes MSRs.
New columns are present in turbostat output:
The Pkg_W column shows Watts for each package (socket) in the system.
On multi-socket systems, the system summary on the 1st row shows the sum
for all sockets together.
The Cor_W column shows Watts due to processors cores.
Note that Core_W is included in Pkg_W.
The optional GFX_W column shows Watts due to the graphics "un-core".
Note that GFX_W is included in Pkg_W.
The optional RAM_W column on server processors shows Watts due to DRAM DIMMS.
As DRAM DIMMs are outside the processor package, RAM_W is not included in Pkg_W.
The optional PKG_% and RAM_% columns on server processors shows the % of time
in the measurement interval that RAPL power limiting is in effect on the
package and on DRAM.
Note that the RAPL energy counters have some limitations.
First, hardware updates the counters about once every milli-second.
This is fine for typical turbostat measurement intervals > 1 sec.
However, when turbostat is used to measure events that approach
1ms, the counters are less useful.
Second, the 32-bit energy counters are subject to wrapping.
For example, a counter incrementing 15 micro-Joule units
on a 130 Watt TDP server processor could (in theory)
roll over in about 9 minutes. Turbostat detects and handles
up to 1 counter overflow per measurement interval.
But when the measurement interval exceeds the guaranteed
counter range, we can't detect if more than 1 overflow occured.
So in this case turbostat indicates that the results are
in question by replacing the fractional part of the Watts
in the output with "**":
Pkg_W Cor_W GFX_W
3** 0** 0**
Third, the RAPL counters are energy (Joule) counters -- they sum up
weighted events in the package to estimate energy consumed. They are
not analong power (Watt) meters. In practice, they tend to under-count
because they don't cover every possible use of energy in the package.
The accuracy of the RAPL counters will vary between product generations,
and between SKU's in the same product generation, and with temperature.
turbostat's -v (verbose) option now displays more power and thermal configuration
information -- as shown on the turbostat.8 manual page.
For example, it now displays the Package and DRAM Thermal Design Power (TDP):
cpu0: MSR_PKG_POWER_INFO: 0x2f064001980410 (130 W TDP, RAPL 51 - 200 W, 0.045898 sec.)
cpu0: MSR_DRAM_POWER_INFO,: 0x28025800780118 (35 W TDP, RAPL 15 - 75 W, 0.039062 sec.)
cpu8: MSR_PKG_POWER_INFO: 0x2f064001980410 (130 W TDP, RAPL 51 - 200 W, 0.045898 sec.)
cpu8: MSR_DRAM_POWER_INFO,: 0x28025800780118 (35 W TDP, RAPL 15 - 75 W, 0.039062 sec.)
Signed-off-by: Len Brown <len.brown@intel.com>
In periodic mode, turbostat writes to stdout,
but users were un-able to re-direct stdout, eg.
turbostat > outputfile
would result in an empty outputfile.
Signed-off-by: Len Brown <len.brown@intel.com>
Turbostat assumed if it can't migrate to a CPU, then the CPU
must have gone off-line and turbostat should re-initialize
with the new topology.
But if turbostat can not migrate because it is restricted by
a cpuset, then it will fail to migrate even after re-initialization,
resulting in an infinite loop.
Spit out a warning when we can't migrate
and endure only 2 re-initialize cycles in a row
before giving up and exiting.
Signed-off-by: Len Brown <len.brown@intel.com>
Now that turbostat is built in the kernel tree,
it can share MSR #defines with the kernel.
Signed-off-by: Len Brown <len.brown@intel.com>
Cc: x86@kernel.org
Counting SMIs is popular, so add a dedicated "-s" option to do it,
and juggle some of the other option letters.
-S is now system summary (was -s)
-c is 32 bit counter (was -d)
-C is 64-bit counter (was -D)
-p is 1st thread in core (was -c)
-P is 1st thread in package (was -p)
bump the minor version number
Signed-off-by: Len Brown <len.brown@intel.com>
# turbostat -d 0x34
is useful for printing the number of SMI's within an interval
on Nehalem and newer processors.
where
# turbostat -m 0x34
will simply print out the total SMI count since reset.
Suggested-by: Andi Kleen
Signed-off-by: Len Brown <len.brown@intel.com>
The -M option dumps the specified 64-bit MSR with every sample.
Previously it was output at the end of each line.
However, with the v2 style of printing, the lines are now staggered,
making MSR output hard to read.
So move the MSR output column to the left where things are aligned.
Signed-off-by: Len Brown <len.brown@intel.com>
The "turbo-limit" is the maximum opportunistic processor
speed, assuming no electrical or thermal constraints.
For a given processor, the turbo-limit varies, depending
on the number of active cores. Generally, there is more
opportunity when fewer cores are active.
Under the "-v" verbose option, turbostat would
print the turbo-limits for the four cases
of 1 to 4 cores active.
Expand that capability to cover the cases of turbo
opportunities with up to 16 cores active.
Note that not all hardware platforms supply this information,
and that sometimes a valid limit may be specified for
a core which is not actually present.
Signed-off-by: Len Brown <len.brown@intel.com>
Under some conditions, c1% was displayed as very large number,
much higher than 100%.
c1% is not measured, it is derived as "that, which is left over"
from other counters. However, the other counters are not collected
atomically, and so it is possible for c1% to be calaculagted as
a small negative number -- displayed as very large positive.
There was a check for mperf vs tsc for this already,
but it needed to also include the other counters
that are used to calculate c1.
Signed-off-by: Len Brown <len.brown@intel.com>
Measuring large profoundly-idle configurations
requires turbostat to be more lightweight.
Otherwise, the operation of turbostat itself
can interfere with the measurements.
This re-write makes turbostat topology aware.
Hardware is accessed in "topology order".
Redundant hardware accesses are deleted.
Redundant output is deleted.
Also, output is buffered and
local RDTSC use replaces remote MSR access for TSC.
From a feature point of view, the output
looks different since redundant figures are absent.
Also, there are now -c and -p options -- to restrict
output to the 1st thread in each core, and the 1st
thread in each package, respectively. This is helpful
to reduce output on big systems, where more detail
than the "-s" system summary is desired.
Finally, periodic mode output is now on stdout, not stderr.
Turbostat v2 is also slightly more robust in
handling run-time CPU online/offline events,
as it now checks the actual map of on-line cpus rather
than just the total number of on-line cpus.
Signed-off-by: Len Brown <len.brown@intel.com>
