Aperf mperf

5 introduced a new esxtop tool indicator called “Aperf/Mperf” to show the effects of Turbo boost as a ratio of clock speeds with and without Turbo. 3. git0. 2019-11-28 - trenn@suse. 5-rc1 kernel version latest mainline commit: commit b3abfd778bf1dbdd - Update cpupower to latest 5. The APERF, MPERF MSRs are defined to count non-halted cycles. Applies to SUSE Linux Enterprise Server 15 SP1 Cause: Not available Workaround Not available Systems affected All Dell EMC PowerEdge servers Tracking esxi clock speeds and turbo,idle states So the system is a ryzen 2600X on a b450 pro board, supposedly according to the AMD community the turbo clocks AKA precision boost is enabled by default. The smaller the sampling interval is, the closer the metric is to the real HW frequency. The Model information value is this guaranteed  30 Oct 2014 pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor  constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2  4 Dec 2018 pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good nopl aperfmperf eagerfpu pni dtes64 monitor ds_cpl vmx smx est tm2 ssse3  17 Aug 2018 arch_perfmon pebs bts aperfmperf eagerfpu pni dtes64 monitor ds_cpl est tm2 ssse3 xtpr pdcm movbe lahf_lm dtherm bogomips : 3199. Turbostat data collection is not atomic. These unobtrusive sensors have already been used in mHealth research to identify biomarkers of stress and other behaviors related to health and wellness. Apr 13, 2020 · Our research began with trapping on all various MSRs: VMX MSRs, EFER, Feature Control, APERF, MPERF, DEBUGCTL, and LSTAR. For the math, you multiply the percentage by  15 Jul 2016 APERF (average) and MPERF (maximum) are MSR registers that can provide feedback on current CPU frequency. May 22, 2012 · Hi, while testing some APERF/MPERF semantics I discovered that this feature is enabled in Xen Dom0, but is not reliable. void dump_clocks_data_terse_label (FILE *writedest) Print the label for the abbreviated clocks data print out. Here is the code I use: ; Read MPERF register mov ecx, 0xe7 rdmsr The code breaks on rdmsr. Additional information is reported depending on hardware counter support. However, when I do so, the machine reboots, probably because of a GP exception. rc2. The fact that on all recent hardware the mperf timer stops ticking in any idle state it is also used to show C0 (processor is active) and Cx (processor is in any The APERF, MPERF MSRs are defined to count non-halted cycles. Aug 04, 2015 · On Tue, Aug 4, 2015 at 2:01 AM, tip-bot for Andy Lutomirski <tipbot@zytor. i686 I also have a rawhide VM with the same symptom: kernel-PAE-3. Governors close-up  pdpe1gb rdtscp lm constant_tsc rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe  Updated frequency code with APERF and MPERF MSR calculations. The virtualization environment (of QEMU) is being run from a VMware virtual Intel Core 2之后的CPU有两个寄存器和CPU频率相关: IA32_MPERF 以及 IA32_APERF. For example: CPU Performance Profile - High Performance; E5-2699 v3 (18c) - base frequency 2300 MHz; 16vCPU CPUStress VM Looking at ESXTOP, A/MPERF = 121. It shows the average frequency (including boost frequencies). Guest kernel reports a fixed cpu frequency in /proc/cpuinfo, this is confused to user when turbo is enable, and aperf/mperf can be used to show current cpu frequency after 7d5905dc14a "(x86 / CPU: Always show current CPU frequency in /proc/cpuinfo)" so guest should support aperf/mperf capability This patch implements aperf/mperf by three mode: none, software emulation, and pass-through None The standard way of doing this on recent Intel processors is to read the APERF and/or MPERF model specific registers and take the delta (one of them is a reference clock, the other measures actual CPU cycles, as they’ll change as turbo or RAPL dit The name comes from the aperf/mperf (average and maximum) MSR registers used which are available on recent X86 processors. For example, with a 2. 9. A deliberate design goal of the in-process iteration runners is to minimise timing noise and distortion from measurements. cpupower tool is unable to read the mperf/aperf registers in the AMD Rome processor, and thus unable to collect the information about boost states. c diff --git  ratio APERF/MPERF architecturally defined. Note that it would be possible to get a clock speed higher than the actual system clock speed, as we have summed N-cores worth of APERF/MPERF. 3 GHz, ratios higher than 1. The Linux kernel's scheduler uses this feature if it sees the CPUID bit, [patch -rt 10/17] x86: Add generic aperf/mperf code From: dino Date: Thu Oct 22 2009 - 08:41:46 EST Next message: dino: "[patch -rt 06/17] sched: scale down cpu_power due to RT tasks" The name comes from the aperf/mperf (average and maximum) MSR registers used which are available on recent X86 processors. 06H. It supports tuning of various parameters related to timing, buffers and protocols (TCP, UDP, SCTP with IPv4 and IPv6). that's a case where it really makes sense; it's the case where the thing that controls the cpu P-state actually learns about how much work was done to APERF (average) and MPERF (maximum) are MSR registers that can provide feedback on current CPU frequency. 5-rc1 kernel version latest mainline commit: commit 4611a4fb0cce3 Fixes aperf/mperf monitoring on latest AMD Rome CPUs (bsc#1152967) - Fix library API breakage (bsc#1154240) A Jan 29, 2020 · APERF/MPERF. These issues are usually caused by an extremely short measurement interval (much less than 1 second), or system activity that prevents turbostat from being able to run on all CPUS to quickly collect data. . Displays the real-time aperf to mperf ratio in the last esxtop update period. Allocate array for storing raw register data from IA32_APERF, IA32_MPERF, and IA32_TIME_STAMP_COUNTER. The interval is defined to be I'm trying to create a QEMU image of a 64-bit Windows 2008 Server install. For context, a large value for arch_max_freq_ratio would be 5000, corresponding to a turbo_freq/base_freq ratio of 5 (normally it's more like 1500-2000). It seems that Windows 7 and Windows 8 read and reset the writeable APERF/MPERF counters on AMD processors. $ perf stat -a -e msr/tsc/,msr/mperf/ -I  cpupower-monitor(1) - Linux man page linux. I'm running in long mode. Listing 2. May 30, 2020 · this is confused to user when turbo is enable, and aperf/mperf can be used to show current cpu frequency after 7d5905dc14a "(x86 / CPU: Always show current CPU frequency in /proc/cpuinfo)" so guest should support aperf/mperf capability This patch implements aperf/mperf by three mode: none, software emulation, and pass-through Hi RongQing, On 2020/6/8 17:34, Li RongQing wrote: Guest kernel reports a fixed cpu frequency in /proc/cpuinfo, this is confused to user when turbo is enable, and aperf/mperf can be used to show current cpu frequency after 7d5905dc14a "(x86 / CPU: Always show current CPU frequency in /proc/cpuinfo)" so guest should support aperf/mperf capability Sep 16, 2016 · aperf_data: The sum of the differences between the APERF counters at the beginning and end of the iteration for all cores. mperf pni pclmulqdq dtes64 monitor ds_cpl vmx e. Kernel. The fact that on all recent hardware the mperf timer stops ticking in any idle state it is also used to show C0 (processor is active) and Cx (processor is in any ESXTOP -> P (Power) -> F (Fields) -> F (APerf)% The %A/MPERF shows the % above base frequency that you are running at per core. 7% * 2300 = 2799. CPU doesn't support APERF/MPERF Our application can REALLY benefit from having visibility into the CPU speed as well as how much time it has spent in the various speeds. Apr 01, 2016 · From: Len Brown <> Subject [PATCH] x86: Calculate MHz using APERF/MPERF for cpuinfo and scaling_cur_freq: Date: Fri, 1 Apr 2016 00:37:00 -0400 Because that hint guarantees we have a 1:1 > > vCPU:CPU binding and guaranteed no over-commit. ECX[Bit 0] = 1 indicates IA32_MPERF MSR and IA32_APERF MSR are rep_good nopl xtopology nonstop_tsc cpuid aperf. I'm trying to read the MPERF and APERF MSRs. Sudeep works on Linux kernel’s power management code, cpuidle, cpufreq, and the ACPI subsystem. APERF was established in 1990 in Melbourne, Australia. Added: Intel CPUs after Core Duo support two Model-Specific registers called IA32_MPERF and IA32_APERF. de - Update intel-speed-select to latest 5. int TSC, APERF, MPERF exposed! Provide a way to add free-running counters support free-running: non-stop, no-interrupt, fixed register Patch adds TSC, APERF, MPERF APERF:increments in proportion to actual performance MPERF: increments in proportion to a fixed frequency ratio APERF/MPERF architecturally defined What is iPerf / iPerf3 ? iPerf3 is a tool for active measurements of the maximum achievable bandwidth on IP networks. Mirror of the canonical repository (updated automatically). Provided by: cpufrequtils_008-1_amd64 NAME cpufreq-aperf - Calculates the average frequency over a time period SYNTAX cpufreq-aperf [options] DESCRIPTION On latest processors exist two MSR registers refered to as: - MPERF increasing with maxium (P0) frequency in C0 - APERF increasing with current/actual frequency in C0 From this information the average frequency over a time period can be mPerf: Using mobile sensors to support productivity and employee well-being Current workforce evaluation tools, such as interviews, cognitive assessments, and questionnaires, can be helpful in assessing job performance, but do not always accurately reflect how an individual is performing. 0-0. By default, turbostat prints a summary of counter results for the entire system, followed by counter results every 5 seconds, under the following headings: LINUX-2626-内核源代码 ―― Re: What Options do I have to obtain help? Hi Sebastian, Again I have followed your advice and changed the driver to the one you have listed and unfortunately I am still experiencing the same problems marginally better in that I was able to create 17No holes before it locks up - this is not a consistent improvement as I can create only 3 holes intel_pstate is a part of the CPU performance scaling subsystem in the Linux kernel (CPUFreq). A utility which uses aperf/mperf is necessary to determine if your CPU is operating above the guaranteed speed. Check our new online training! Stuck at home? Frequency calculated with APERF/MPERF MSR registers captured on the clockcycles event. " dtes64: 64-bit Debug Store; monitor: Monitor/Mwait support (Intel SSE3 supplements) ds_cpl: CPL Qual. indicates IA32_MPERF MSR and IA32_APERF MSR are present. mperf_data : as above, but for MPERF. He works at ARM Ltd, Cambridge as a Linux Kernel Engineer mainly focusing on power management in Linux kernel, ACPI and other platform/power interfaces like PSCI, SCPI, SCMI,. Note, however, that some of those processors may not be supported. BattlEye Procedures RDTSC/CPUID/RDTSC * Only IA32_APERF/IA32_MPERF ratio is architecturally defined and * no meaning should be associated with absolute values of these MSRs. It is a software frequency showing the average logical core frequency between two samples. 9). The -P option limits output to the 1st thread in each Package. Other tools to get the CPU  Note that the APERF/MPERF counters must be read in the same order before and after a benchmark. Although it is not guaranteed by the architecture, turbostat assumes that they count at TSC rate, which is true on all processors tested to date. 7% (per used core) 121. A large increment frequency for the MPERF counter would be 5GHz (the base clock of all CPUs on the market today is less than that). Use the %A/MPERF ratio column to identify at what frequency the processor is currently running. Currently these registers are used  On latest processors exist two MSR registers refered to as: - MPERF increasing with maxium (P0) frequency in C0 - APERF increasing with current/actual  I'm trying to read the MPERF and APERF MSRs. bool cpuid_timestamp_counter_avail (void) Check availability of the time-stamp counter. %A/MPERF *nominal frequency of the processor = current frequency of the processor Oct 23, 2018 · ESXi 6. The results were somewhat disappointing. Here is the code I use: 1 Apr 2016 For x86 processors with APERF/MPERF and TSC, return meaningful and create mode 100644 arch/x86/kernel/cpu/aperfmperf. aperf/mperf is Sep 26, 2017 · With an APERF/MPERF ratio of precisely 1, the processor is running at full speed; below 1 it is in a power-saving mode; and above 1, turbo boost is being used. org Bugzilla – Bug 66581 intel_pstate/powersave - cpu frequency remains at high level (Turbo) after suspend/resume Last modified: 2016-05-22 22:48:05 UTC Nov 28, 2019 · After that, it should be possible to calculate an average of the effective clock speed over that measurement time window by doing this: Content of APERF / content of MPERF × P0 clock frequency. Use CPUID to check the P-State hardware coordination feedback capability bit. Description of problem: My virtual machine crashes immediately on booting 3. MPERF counts at the maximum frequency the CPU supports, while APERF counts at the actual frequency. Version-Release number of selected component (if applicable): kernel-PAE-3. Currently these registers are used to detect current CPU frequency on each core in a multi-core x86 processor where the frequency of the entire package is changed. 10, “turbostat” . Please send Pull Requests here! - Feandil/collectd Aperf and mperf are two hardware registers used to keep track of the actual frequency and nominal frequency of the processor. The fact that on all recent hardware the mperf timer stops ticking in any idle state it is also used to show C0 (processor is active) and Cx (processor is in any Elixir Cross Referencer. ○ no sampling, no vmm. The esxtop power screen (obtained by pressing the p key) shows power information for the vSphere host. Use this command if you want to know about the latest filters. net/man/1/cpupower-monitor The aperf/mperf ratio of about 150% on CPU 2 and CPU 4 means that the processor is running at around 3. 5GHz. blob APERF model-specific registers MPERF model-specific registers For more details about turbostat output and how to read it, see Section A. e. fc20. h. aperfmperf: APERF and MPERF are MSR registers "APERF and MPERF are MSR registers that can provide feedback on current CPU frequency. APERF and MPERF are calculated as a different over a measurement interval. Module Name: src Committed By: jruoho Date: Fri Feb 25 10:59:32 UTC 2011 Modified Files: src/sys/arch/x86/acpi: acpi_cpu_md. etc. The ratio tells you how fast the processor is running, which until now was difficult to see or /aperf filterhelp aperf. 6GHz core and a turbo limit of 3. IA32_APERF. MPERF 表示CPU支持的最高频率, 而 APERF 表示CPU实际的工作频率. Mar 21, 2018 · Esxtop in vSphere 6. > input: > registers APERF, MPERF (model-specific). rc3. You can add this new column by pressing the f key. Debug Store - CPL is the current privilege level (bits in CS register) vmx: Hardware virtualization: Intel VMX (a) : (b)) int aperf_mperf_unstable; int backwards_count; char *progname; cpu_set_t *cpu_present_set, *cpu_affinity_set; size_t cpu_present_setsize, cpu_affinity_setsize; struct thread_data { unsigned long long tsc; unsigned long long aperf; unsigned long long mperf; unsigned long long c1; unsigned long long extra_msr64; unsigned long long It also requires processor support for invariant time stamp counters, and APERF and MPERF model-specific registers. / arch / x86 / include / asm / processor. Bug 1263036 - [ThinkStation & ThinkPad][Skylake] Cpuscaling failed on Intel skylake processors: maximum and minimum frequency reported incorrectly. -036. android / kernel / common / dede17b8e931eeaa38b0288e8d545d558d904942 / . It is a scaling driver for the Sandy Bridge and later generations of Intel processors. I have an Intel Haswell processor. 26 May 2008 On x86 hardware, APERF and MPERF are MSR registers that can provide feedback on current CPU frequency. It reports the number of boost states as zero. We also trapped on execution of VMX/SVM instructions, and traced back all executions of RDTSC and CPUID. Extremely short measurement intervals (much less than 1 second), or system activity that prevents turbostat from being able to run on all CPUS to quickly collect data, will result in inconsistent results. IA32_MPERF MSR and IA32_APERF MSR for P-state Coordination. filterhelp Displays info about the filters in general and lists all possible filters with their description. On some of the latest AMD processors (Family 0x16 processors), those registers are not always supported. The system statistics collection daemon. [v2] x86: Calculate MHz using APERF/MPERF for cpuinfo and scaling_cur_freq The name comes from the aperf/mperf (average and maximum) MSR registers used which are available on recent X86 processors. I don't see a usable "/sys" filesystem interface for this either. I want to verify if its working, but it seems esxi lacks very basic functionality of reporting live cpu clock speed. i686 How reproducible: 100% Steps to Reproduce: 1. 1 mPerf will collect data from a suite of mobile sensors, both body-worn and situated in the workplace. Although it is not guaranteed by the architec†ture, turbostat assumes that they count at TSC  16 intel_pstate powersave governor (since Linux v3. A) get the time that a well-defined loop take to complete at different frequencies, and B) use IA32_MPERF MSR and IA32_APERF MSR (Chap 13, page 13-2) which division is the ratio of the processor frequency. 读取以及设置的话,可以通过rdmsr以及wrmsr设置。示例: Jan 16, 2011 · * Only IA32_APERF/IA32_MPERF ratio is architecturally defined and * no meaning should be associated with absolute values of these MSRs. 9 i686-PAE kernels. For this, I used the cpuctl driver and the cpucontrol command as well as the basic calculator bc . cpuid_mperf_and_aperf_avail (void) Check availability of p-state hardware coordination feedback, indicating presence of IA32_APERF and IA32_MPERF. Bug 49971 - no Turbo CORE on AMD C _available_frequencies 2800000 2200000 1500000 800000 # But turbostat can determine the effective frequency via APERF/MPERF Oct 27, 2019 · IA32_APERF MSR. fc19. cmd. Turbostat is lightweight, and its data collection is not atomic. 5 adds a new column %A/MPERF in the Power Management screen. > > Paolo Seem kernel should give the capability to userspace to disable the intercept mperf/aperf for KVM_HINTS_REALTIME So I will change this patch to support three mode mperfaperf: none, software emulate, and [PATCH] x86: Calculate MHz using APERF/MPERF for cpuinfo and scaling_cur_freq From: Len Brown Date: Fri Apr 01 2016 - 00:38:06 EST Next message: Jason Wang: "Re: [PATCH net-next 1/6] net: skbuff: don't use union for napi_id and sender_cpu" Patch adds TSC, APERF, MPERF APERF:increments in proportion to actual performance MPERF: increments in proportion to a fixed frequency ratio APERF/MPERF architecturally defined New msr PMU with new events: tsc, aperf, mperf no sampling, no vmm $ perf stat -a -e msr/tsc/,msr/mperf/ -I 1000 sleep 10 The CPU frequency driver/governer uses APERF/MPERF as well - we > could argue and say that it should not be using/exposing that data to > user space or using that data to make decisions. 2016-08-23 21:19:28 - get_mperf_aperf - cpuid[0x6][ecx] = 00000001 2016-08-23 21:19:28 - Get_MPERF_APERF - high perf counter freq = 4018614000 2016-08-23 21:19:29 - GetAMDMult - CPUDid_P = 0, CPUFid_P = 25 Sign in. Trick: APERF/MPERF can be also used to check the average frequency in the last period of time: CPU freq = (delta_APERF / delta_MPERF) * nominal_freq. 92 11 Jan 2012 pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor  4 Mar 2017 pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor  2017年12月29日 rep_good xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 popcnt lahf_lm  30 May 2017 lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx  pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf pni 10 1/19/2018 11:18:18 AM OS: . This has the desired effect of tracking each VCPU’s turbo history as it moves around the system’s CPUs. int cpuid_num_pmc (void) Determine which performance monitoring counters (PMCs) are available. %A/MPERF : aperf and mperf are two hardware registers used to keep track of the actual frequency and nominal frequency of the processor. • IA32_MPERF MSR (E7H) increments in proportion to a fixe d frequency, which is configured when the processor is booted. An elided version of the Python in-process iteration  The APERF, MPERF MSRs are defined to count non-halted cycles. IA32_MPERF. P-state = (delta_APERF / delta_MPERF) * max_pstate. 实际的频率为:freq=(maxfrequency*APERF)/MPERF. But there is a new issue. See Figure 14-1 for an overview of the two 64-bit MSRs and the bullets below for a detailed description: Figure 14-1. With the help of generous donations from the podiatry community – podiatrists, medical suppliers and patients, APERF has supported more than 70 research projects in the past 25 years. void perf_storage (struct perf_data **pd) Allocate array for storing raw register data from IA32_PERF_STATUS and IA32_PERF_CTL. die. So, you want to access the read-only APERF/MPERF counters at registers 0xc00000E7/E8. MLPerf's mission is to build fair and useful benchmarks for measuring training and inference performance of ML hardware, software, and services. help. It will be used on OpenStack as an instance. > > > > Yes but that's up to userspace. 0 may be seen. MLPerf is presently led by volunteer working group chairs. 07/09. Options The -p option limits output to the 1st thread in 1st core of each package. ○ New msr PMU with new events: tsc, aperf, mperf. • IA32_APERF MSR (E8H) increments in pr oportion to actual performance, while accounting for hardware coordi- May 26, 2008 · On x86 hardware, APERF and MPERF are MSR registers that can provide feedback on current CPU frequency. CPUID. com> wrote: APERF, MPERF, and nothing else, and someone asks for PPERF, then the check Host APERF and MPERF track Physical CPUs, so this code samples the APERF and MPERF deltas on the current Physical CPU while the VCPU is running there. the APERF to MPERF ratio  24 авг 2018 Значение столбца APERF/MPERF выше 100% само по себе не может служить достаточным доказательством функционирования  referred to as the “Core” algorithm), is based on the values read from the APERF and MPERF feedback registers and the previously requested target P- state. Corrected CPUID Function 04h text to specify EAX[31:26] is APIC IDs reserved  29 Mar 2011 When the processor is stalled due to memory access, bus activity, or the like, the feedback may appear lower, i. MLPerf was founded in February, 2018 as a collaboration of companies and researchers from educational institutions. turbostat must be run on root, andminimally requires that the processorsupports an "invariant" TSC, plus the APERF and MPERF MSRs. c Log Message: Add support for APERF and MPERF on AMD processors. Other tools to get the CPU frequency It looks like the following tools are less reliable to estimate the CPU frequency. aperf mperf

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