Hi Linus, please pull from: git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6.git tools This creates a power directory under tools/ and puts two new tools there, turbostat and x86_energy_perf_policy. While the tools/ directory is not the most organized part of the kernel tree, this patch ups the bar on some of code there by supplying Makefiles and man pages. This will update the files shown below. thanks! Len Brown Intel Open Source Technology Center ps. individual patches are available on linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx and a consolidated plain patch is available here: http://ftp.kernel.org/pub/linux/kernel/people/lenb/tools/patches/2.6.37/acpi-tools-20101013-2.6.37.diff.gz tools/power/x86/turbostat/Makefile | 8 + tools/power/x86/turbostat/turbostat.8 | 172 ++++ tools/power/x86/turbostat/turbostat.c | 1048 ++++++++++++++++++++ tools/power/x86/x86_energy_perf_policy/Makefile | 8 + .../x86_energy_perf_policy.8 | 104 ++ .../x86_energy_perf_policy.c | 325 ++++++ 6 files changed, 1665 insertions(+), 0 deletions(-) create mode 100644 tools/power/x86/turbostat/Makefile create mode 100644 tools/power/x86/turbostat/turbostat.8 create mode 100644 tools/power/x86/turbostat/turbostat.c create mode 100644 tools/power/x86/x86_energy_perf_policy/Makefile create mode 100644 tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.8 create mode 100644 tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.c through these commits: with this log: commit eca0bdd326d2cf9127bbb6ac602bfbcbf169c10d Merge: 3c0eee3 103a8fe d5532ee Author: Len Brown <len.brown@xxxxxxxxx> Date: Tue Jan 11 23:06:28 2011 -0500 Merge branches 'turbostat' and 'x86_energy_perf_policy' into tools commit d5532ee7b40b4a64e605e543b0387694430ecb79 Author: Len Brown <len.brown@xxxxxxxxx> Date: Fri Oct 22 23:53:03 2010 -0400 tools: create power/x86/x86_energy_perf_policy MSR_IA32_ENERGY_PERF_BIAS first became available on Westmere Xeon. It is implemented in all Sandy Bridge processors -- mobile, desktop and server. It is expected to become increasingly important in subsequent generations. x86_energy_perf_policy is a user-space utility to set the hardware energy vs performance policy hint in the processor. Most systems would benefit from "x86_energy_perf_policy normal" at system startup, as the hardware default is maximum performance at the expense of energy efficiency. See x86_energy_perf_policy.8 man page for more information. Background: Linux-2.6.36 added "epb" to /proc/cpuinfo to indicate if an x86 processor supports MSR_IA32_ENERGY_PERF_BIAS, without actually modifying the MSR. In March, 2010, Venkatesh Pallipadi proposed a small driver that programmed MSR_IA32_ENERGY_PERF_BIAS, based on the cpufreq governor in use. It also offered a boot-time cmdline option to override. http://lkml.org/lkml/2010/3/4/457 But hiding the hardware policy behind the governor choice was deemed "kinda icky". In June, 2010, I proposed a generic user/kernel API to generalize the power/performance policy trade-off. "RFC: /sys/power/policy_preference" http://lkml.org/lkml/2010/6/16/399 That is my preference for implementing this capability, but I received no support on the list. So in September, 2010, I sent x86_energy_perf_policy.c to LKML, a user-space utility that scribbles directly to the MSR. http://lkml.org/lkml/2010/9/28/246 Here is that same utility, after responding to some review feedback, to live in tools/power/, where it is easily found. Signed-off-by: Len Brown <len.brown@xxxxxxxxx> commit 103a8fea9b420d5faef43bb87332a28e2129816a Author: Len Brown <len.brown@xxxxxxxxx> Date: Fri Oct 22 23:53:03 2010 -0400 tools: create power/x86/turbostat turbostat is a Linux tool to observe proper operation of Intel(R) Turbo Boost Technology. turbostat displays the actual processor frequency on x86 processors that include APERF and MPERF MSRs. Note that turbostat is of limited utility on Linux kernels 2.6.29 and older, as acpi_cpufreq cleared APERF/MPERF up through that release. On Intel Core i3/i5/i7 (Nehalem) and newer processors, turbostat also displays residency in idle power saving states, which are necessary for diagnosing any cpuidle issues that may have an effect on turbo-mode. See the turbostat.8 man page for example usage. Signed-off-by: Len Brown <len.brown@xxxxxxxxx> _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
