Linux kernel stable tree https://git.rulkc.org/pub/scm/linux/kernel/git/stable/linux.git/atom?h=linux-3.4.y 2014-02-13T19:51:09+00:00 2014-02-13T19:51:09+00:00 Josh Triplett josh@joshtriplett.org 2013-08-21T00:20:14+00:00 urn:sha1:4c6544f60383bf6e95744f874598f7e5dd952110 commit 2b92865e648ce04a39fda4f903784a5d01ecb0dc upstream. turbostat uses inline assembly to call cpuid. On 32-bit x86, on systems that have certain security features enabled by default that make -fPIC the default, this causes a build error: turbostat.c: In function ‘check_cpuid’: turbostat.c:1906:2: error: PIC register clobbered by ‘ebx’ in ‘asm’ asm("cpuid" : "=a" (fms), "=c" (ecx), "=d" (edx) : "a" (1) : "ebx"); ^ GCC provides a header cpuid.h, containing a __get_cpuid function that works with both PIC and non-PIC. (On PIC, it saves and restores ebx around the cpuid instruction.) Use that instead. Signed-off-by: Josh Triplett <josh@joshtriplett.org> Signed-off-by: Len Brown <len.brown@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 2012-03-30T02:27:19+00:00 Len Brown len.brown@intel.com 2012-03-30T02:19:58+00:00 urn:sha1:15aaa34654831e98dd76f7738b6c7f5d05a66430 Sometimes users have turbostat running in interval mode when they take processors offline/online. Previously, turbostat would survive, but not gracefully. Tighten up the error checking so turbostat notices changesn sooner, and print just 1 line on change: turbostat: re-initialized with num_cpus %d Signed-off-by: Len Brown <len.brown@intel.com> 2012-03-30T02:04:58+00:00 Len Brown len.brown@intel.com 2012-03-30T01:44:40+00:00 urn:sha1:88c3281f7ba449992f7a33bd2452a8c6fa5503cb turbostat uses /dev/cpu/*/msr interface to read MSRs. For modern systems, it reads 10 MSR/CPU. This can be observed as 10 "Function Call Interrupts" per CPU per sample added to /proc/interrupts. This overhead is measurable on large idle systems, and as Yoquan Song pointed out, it can even trick cpuidle into thinking the system is busy. Here turbostat re-schedules itself in-turn to each CPU so that its MSR reads will always be local. This replaces the 10 "Function Call Interrupts" with a single "Rescheduling interrupt" per sample per CPU. On an idle 32-CPU system, this shifts some residency from the shallow c1 state to the deeper c7 state: # ./turbostat.old -s %c0 GHz TSC %c1 %c3 %c6 %c7 %pc2 %pc3 %pc6 %pc7 0.27 1.29 2.29 0.95 0.02 0.00 98.77 20.23 0.00 77.41 0.00 0.25 1.24 2.29 0.98 0.02 0.00 98.75 20.34 0.03 77.74 0.00 0.27 1.22 2.29 0.54 0.00 0.00 99.18 20.64 0.00 77.70 0.00 0.26 1.22 2.29 1.22 0.00 0.00 98.52 20.22 0.00 77.74 0.00 0.26 1.38 2.29 0.78 0.02 0.00 98.95 20.51 0.05 77.56 0.00 ^C i# ./turbostat.new -s %c0 GHz TSC %c1 %c3 %c6 %c7 %pc2 %pc3 %pc6 %pc7 0.27 1.20 2.29 0.24 0.01 0.00 99.49 20.58 0.00 78.20 0.00 0.27 1.22 2.29 0.25 0.00 0.00 99.48 20.79 0.00 77.85 0.00 0.27 1.20 2.29 0.25 0.02 0.00 99.46 20.71 0.03 77.89 0.00 0.28 1.26 2.29 0.25 0.01 0.00 99.46 20.89 0.02 77.67 0.00 0.27 1.20 2.29 0.24 0.01 0.00 99.48 20.65 0.00 78.04 0.00 cc: Youquan Song <youquan.song@intel.com> Signed-off-by: Len Brown <len.brown@intel.com> 2012-03-29T17:22:06+00:00 Len Brown len.brown@intel.com 2012-02-06T23:37:16+00:00 urn:sha1:e23da0370f80834e971142e50253f5b79be83631 turbostat -s cuts down on the amount of output, per user request. also treak some output whitespace and the man page. Signed-off-by: Len Brown <len.brown@intel.com> 2012-01-18T23:51:48+00:00 Linus Torvalds torvalds@linux-foundation.org 2012-01-18T23:51:48+00:00 urn:sha1:507a03c1cba0e32309223d23d19a1bfc0916c140 This includes initial support for the recently published ACPI 5.0 spec. In particular, support for the "hardware-reduced" bit that eliminates the dependency on legacy hardware. APEI has patches resulting from testing on real hardware. Plus other random fixes. * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux: (52 commits) acpi/apei/einj: Add extensions to EINJ from rev 5.0 of acpi spec intel_idle: Split up and provide per CPU initialization func ACPI processor: Remove unneeded variable passed by acpi_processor_hotadd_init V2 ACPI processor: Remove unneeded cpuidle_unregister_driver call intel idle: Make idle driver more robust intel_idle: Fix a cast to pointer from integer of different size warning in intel_idle ACPI: kernel-parameters.txt : Add intel_idle.max_cstate intel_idle: remove redundant local_irq_disable() call ACPI processor: Fix error path, also remove sysdev link ACPI: processor: fix acpi_get_cpuid for UP processor intel_idle: fix API misuse ACPI APEI: Convert atomicio routines ACPI: Export interfaces for ioremapping/iounmapping ACPI registers ACPI: Fix possible alignment issues with GAS 'address' references ACPI, ia64: Use SRAT table rev to use 8bit or 16/32bit PXM fields (ia64) ACPI, x86: Use SRAT table rev to use 8bit or 32bit PXM fields (x86/x86-64) ACPI: Store SRAT table revision ACPI, APEI, Resolve false conflict between ACPI NVS and APEI ACPI, Record ACPI NVS regions ACPI, APEI, EINJ, Refine the fix of resource conflict ... 2012-01-18T06:15:54+00:00 Len Brown len.brown@intel.com 2012-01-18T06:15:54+00:00 urn:sha1:79ba0db69c5887f1ad4ed51d58894e7e889084b0 2011-12-15T15:34:20+00:00 Arun Thomas arun.thomas@gmail.com 2011-08-16T22:34:14+00:00 urn:sha1:9b6cf1a0120a80ec342f10c297efaa0ba79f7ab7 Field names were shortened: "pkg" is now "pk", "core" is now "cr" Signed-off-by: Arun Thomas <arun.thomas@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz> 2011-11-18T08:32:01+00:00 Len Brown len.brown@intel.com 2011-11-18T08:32:01+00:00 urn:sha1:553575f1ae048aa44682b46b3c51929a0b3ad337 Signed-off-by: Len Brown <len.brown@intel.com> 2011-11-07T03:14:50+00:00 Len Brown len.brown@intel.com 2011-11-07T03:14:50+00:00 urn:sha1:efb90582c575084723cc14302c1300cb26c7e01f 2011-08-02T22:33:31+00:00 Len Brown len.brown@intel.com 2011-07-31T22:19:33+00:00 urn:sha1:d30c4b7a87e8b19583d5ef1402d9b38f51e30f44 Reduce columns for package number to 1. If you can afford more than 9 packages, you can also afford a terminal with more than 80 columns:-) Also shave a column also off the package C-states Signed-off-by: Len Brown <len.brown@intel.com>