> > cpuid=['0xa:eax=0x07300403,ebx=0x00000004,ecx=0x00000000,edx=0x00000603' ] > > This cpuid config variable should not be needed if your cpu is supported in > vmx_vpmu_initialise() where you added a lot of processors with your patch. Edit Revision; Update Diff; Download Raw Diff; Edit Related Revisions... Edit Parent Revisions; Edit Child Revisions; Edit Related Objects... Edit Commits; Subscribe. PIT, HPET, etc. I'm not attaching any patches or logs. If Linux doesn’t have the same issue then go to Microsoft for help.). It is extremely helpful for me. + +**/ +UINT64 Intel? RAM installed is 8GB with only 3.20GB usable. The SDM says "The > returned information should not be used for any other purpose as the Intel processor identification and the cpuid instruction simple cpuid utility for uefi s musings intel processor identification and the cpuid instruction infosec handlers diary blog. You can rate examples to help us improve the quality of examples. Clean install of 1511 no issues, cpu hitting 1.4 to 4.7 ghz as it should. The IA32_TSC_ADJUST MSR is an example of an interface to adjust … 2020-11-30 Prevent race in single_thread_set() openbsd-t Martin Pieuch 5. FreeBSD src tree (read-only mirror). nasm-utils-inc.asm . The extended topology enumeration leaf of CPUID (leaf 11) is the preferred interface for system topology enumeration for future Intel 64 processor. Commit Message. The mtc_period value is converted to the MTC frequency as: CTC-frequency / (2 ^ value) e.g. 2020-11-30 [1] Re: [PATCH] Fix a bug where GDB could not display sym openbsd-t Masato Asou 2. embedded topics. o As we know CPUID signature could be hard to identify processor XTAL frequency is? Igor was right. CPUID leaf 0x16 stays the more or less the same and isn't related to ART. @Igor, Thanks for your comment about VirtualBox. I have a Windows 7 Professional 32-Bit PC, CPU is an Intel Core i5-3570 3.40GHz. * cpuid.c: Added print_f_0_edx to show L3 cache QoS monitoring support. Root partition could observe more CPUID features than Guest Partition. Message ID: 1547468699-17633-5-git-send-email-like.xu@linux.intel.com: State: New: Headers: show Series: Introduce cpu die topology and enable CPUID.1F for i386 Related: show. Authored by kib on Sep 24 2019, 10:22 AM. The workload is any benchmark/diagnostic program which uses TSC ratios to determine exact CPU frequency on Skylake. CPUID.0x15 takes precedence over CPU-frequency for TSC frequency discovery. msr-access.c . All leafs between 0xD and 0x16 are not reported for some reason with Hyper-V enabled. Starting with version 3.50, if cpuid leaf 0 does not return at least 1 in eax, then although the cpuid instruction is implemented, it is not the slightest bit useful to the kernel and is dismissed as unsupported, such that the processor must be an 80386 or … Even the root partition doesn’t see real hardware. CPUID should be called with EAX = 0 first, as this will store in the EAX register the highest EAX calling parameter (leaf) that the CPU implements. x86: Fall back to leaf 0x16 if TSC frequency is obtained by CPUID and leaf 0x15 is not functional. Otherwise we will have to emulate other CPUID leaf, which makes it complex. The leaf is present e.g. Re: [PATCH] arch/x86/kernel/tsc.c : set X86_FEATURE_ART for TSC on CPUs like i7-4910MQ : bug #194609 From: Jason Vas Dias Date: Wed Feb 22 2017 - 15:59:22 EST Next message: Tobin C. Harding: "[PATCH v2] ncpfs: Remove cast from memory allocation" Previous message: Ken Goldman: "Re: [tpmdd-devel] [PATCH v2 4/7] tpm: infrastructure for TPM spaces" In reply to: Jason Vas Dias: "Re: … Yes, you are correct that Intel(R) Vtune(TM) tools do not run in the root partition or guest partition of MS* Hyper-V* for the same reason. This patch uses the new socket/die/core/thread model to generate cpuid… Stuck at home? I am sure I am not the only developer who would like to be able to use Hyper-V and be able to run VTune in the root partition without having to uninstall the Hyper-V role first. Just because the CPU is virtualized doesn't mean software running in root partition shouldn't be able to accurately identify it. 腾讯针对云的场景研发的服务器操作系统. Cc: Paolo Bonzini Cc: Radim Krčmář Signed-off-by: Wanpeng Li --- x86/Makefile.x86_64 | 1 + x86/apic_timer_latency.c | 125 +++++ x86/unittests.cfg | 6 +++ 3 files changed, 132 insertions(+) create mode 100644 … The IA32_TSC_ADJUST MSR is an example of an interface to adjust k. It is definitely causing application compatibility issues across different versions of their OS unless developers implement some sort of workaround which doesn't seem possible given that it's an artificial restriction imposed by the Hypervisor. " So now we arrive in quick_pit_calibrate(), which directly programs the @Thai So we only check CPUID Leaf 0x15. Check our new online training! This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. Use CPUID leaf 0x15 to get TSC frequency when the calibration is. A reliable method is to install Linux on the same machine and compare it with Windows with the exact same BIOS configuration. You can check bit 17 of CPUID leaf 1 ECX register for the presence/absence of PCID in the vmware.log of any VM. Stuck at home? Ultimately, the fix for TSC with Hyper-V enabled would have to come from Microsoft. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. @@ -129,6 +129,26 @@ tsc_freq_vmware(void), @@ -253,17 +273,18 @@ probe_tsc_freq(void). If either the peripheral or a random number is not available, the program will terminate with a status of 1. exact-int.h . + In newer flavors of the CPU, core xtal frequency is returned in ECX or 0 if not supported. The CPUID instruction in future Intel 64 processors may support leaf 11 independent of x2APIC hardware. In one-shot mode, the I always search before starting a new thread. util.hpp . You can check bit 17 of CPUID leaf 1 ECX register for the presence/absence of PCID in the vmware.log of any VM. [x86] MCE/AMD: Turn off MC4_MISC thresholding on all family 0x15 models [x86] MCE/AMD: Carve out the MC4_MISC thresholding quirk; ath10k: fix fw crash by moving chip reset after napi disabled [ppc64el] Fix vDSO clock_getres() ext4: work around deleting a file with i_nlink == 0 safely (CVE-2019-19447) mm/shmem.c: cast the type of unmap_start to u64 Test the non-AVX, AVX2 and AVX-512 speeds for various types of CPU intensive loops, across various active core counts. Before the version 4.0 from Windows NT 4.0 SP6, the kernel also regards cpuid as unusable if leaf 0 returns with eax greater than 3. In order to add the emulation of CPUID 0x16, it is expected that it is handled when the CPUID 0x15 is supported. The IA32_TSC_ADJUST MSR is an example of an interface to adjust k. … So the Westmere X5675 will not have the INVPCID instruction. Any program using Leaf 0x15 to determine TSC ratio produces invalid time measurements because it cannot read the CPUID leaf 0x15. > > Also, does this thing let us learn … Here it says: https://msdn.microsoft.com/en-us/library/cc768520(v=bts.10).aspx, "Partitions do not have access to the physical processor, nor do they handle the processor interrupts. The reason is probably the same (no access to performance counter MSRs). 2020-11-30 [1] Use SMR_TAILQ for `ps_threads' openbsd-t Martin Pieuch 6. Pastebin.com is the number one paste tool since 2002. for enhanced PTP > accuracy. Whatever the merits as a defence against implausibility when If I am reading the article at the link you posted correctly it says: I read that as "the hypervisor host has access to hardware". On systems that support ART a new CPUID leaf (0x15) returns parameters “m†and “n†such that: TSC_value = (ART_value * m) / n + k [n >= 2] [.k is an offset that can adjusted by a privileged agent. When Hyper-V role is installed on Windows 8.1 Professional x64 the last CPUID leaf my Skylake i7-6700K reports is leaf 0xD. stats.hpp . 1423 // availability of specific pconfig leafs. + @return The number of TSC counts per second. Finally, if I am not mistaken, VTune Analyzer also won't work with Hyper-V enabled. Generated on 2019-Mar-29 from project linux revision v5.1-rc2 Powered by Code Browser 2.1 Generator usage only permitted with license. Executing the cpuid instruction with 1 in eax loads a processor identification signature into eax.This is a broad description of the processor in terms of its family, model and stepping. Instead of writing off the processor as an 80386 or 80486, the kernel assigns it to family 5, model 0 and stepping 0, as if to recognise a Pentium. Hello. Luckily, I found this thread with the discussion and I realized about the problem. Yes, Hyper-V does not expose all CPUID features to Root or Guest partition. value 3 means one eighth of CTC-frequency Where CTC is the hardware crystal clock, the frequency of which can be related to TSC via values provided in cpuid leaf 0x15. Frequency in MHz = Core XTAL frequency * EBX/EAX. GitHub Gist: instantly share code, notes, and snippets. More on that in a separate thread I am about to compose soon. Code Browser 2.1 Generator usage only permitted with license. It developed from what the 80386 processor loads into the dx register as an initial state and is still what later processors have as their initial edx. If yes, can you share the type of workload that you are running. 2020-11-30 Prevent race in single_thread_set() openbsd-t Martin Pieuch 5. > > It's correct, that the NONSTOP_TSC feature depends on the availability of > ART, but that has nothing to do with the feature bit, which solely > describes the ratio between TSC and the ART frequency which is exposed to > peripherals. Next Last 1. Intel finally added this information, which allows us to not parse CPU identification string looking for the nominal frequency. Generated on 2019-Mar-29 from project linux revision v5.1-rc2 Powered by Code Browser 2.1 Generator usage only permitted with license. HDD size is 500GB, only 100GB is in use I installed the Oracle software and created a Windows XP Professional VM with a 30GB HDD, 512MB vRAM, 1CPU, bridges network set to DHCP. All Bootlin training courses When Hyper-V role is installed on Windows 8.1 Professional x64 the last CPUID leaf my Skylake i7-6700K reports is leaf 0xD. tsc-support.hpp . View code README.md avx-turbo. After checking with Skylake CPU and Hyper-V on Windows 10, CPUID leaves are available up to 0x15 (only 0x16 is missing) so definitely it seems to be a problem with Windows 8.1 Hyper-V implementation. On systems that support ART a new CPUID leaf (0x15) returns parameters “m” and “n” such that: TSC_value = (ART_value * m) / n + k [n >= 1] [k is an offset that can adjusted by a privileged agent. 411 // The check below for i386 was copied from clang's cpuid.h ... 598 case 0x15: // Intel EP80579 Integrated Processor and Intel EP80579. nasm-utils-helper.c . @Gaston cpuid.hpp . However, it would be great if there is any update on this, many months after the initial issue was reported. > > It's correct, that the NONSTOP_TSC feature depends on the availability of > ART, but that has nothing to do with the feature bit, which solely calculated by factors read from specific MSR registers or from a cpuid leaf (0x15). Mute Notifications; Award Token; Flag For Later; Tags. On systems that support ART a new CPUID leaf (0x15) returns parameters “m” and “n” such that: TSC_value = (ART_value * m) / n + k [n >= 2] [k is an offset that can adjusted by a privileged agent. So the Westmere X5675 will not have the INVPCID instruction. * cpuid.c: Added 0x15/ecx nominal core crystal clock decoding. Values from CPUID[0x15]: 2; 300; 0; -- 150 * 25 MHz = 3,75 GHz 150 * 24 MHz = 3,60 GHz Does it mean that newest desktop Skylake-X CPUs are not really supported yet, or it's an actual bug? conference about. The SDM says "The > returned information should not be used for any other purpose as the > returned information does not accurately correlate to information / > counters returned by other processor interfaces." All leafs between 0xD and 0x16 are not reported for some reason with Hyper-V enabled. The 32-bit Windows kernel uses cpuid leaf 2 in version 5.0 and higher for processors whose vendor string from cpuid leaf 0 is GenuineIntel and in version 6.2 and higher for processors whose vendor string is CentaurHauls. The IA32_TSC_ADJUST MSR is an example of an interface to adjust … + + The TSC counting frequency is determined by using CPUID leaf 0x15. The APIC timer frequency will be the processor’s bus clock or core crystal clock frequency (when TSC/core crystal clock ratio is enumerated in CPUID leaf 0x15) divided by the value specified in the divide configuration register. BIOS vendor. There is also ability to re-route host USB devices to VM (such as USB to RS232 converters, smart card readers, cameras, dongles) and it supports more OS flavors and disk formats. CPUID leaf 0x16 stays the more or less the same and isn't related to ART. CPUID Leaf 2 . Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3. Thanks for the reply. o And the PCD will be defined depends on platform specific and during project early development. 2020-11-30 [1] ACPI diff that needs wide testing openbsd-t Mark Kettenis 4. Check our new online training! CPUID leaf 1FH is a preferred superset to leaf 0BH. Microsoft? On systems that support ART a new CPUID leaf (0x15) returns parameters “m” and “n” such that: TSC_value = (ART_value * m) / n + k [n >= 2] [k is an offset that can adjusted by a privileged agent. cpuid.txt. As for the design thing -- I can understand hiding MSRs from guest partitions to prevent timing based side-channel attacks, but messing with root partition is IMO poor design, because people do run applications which read MSRs in root partition as well, especially in non-Server OS editions and especially developers. Live Embedded Event. 849 case 0x15: l1 = 16; break; // 15h code L1 cache, 16 KB, 4 ways, 32 byte lines (IA-64) 850 case 0x2C: l1 = 32; break ; // 2Ch data L1 cache, 32 KB, 8 ways, 64 byte lines 851 case 0x30: l1 = 32; break ; // 30h code L1 cache, 32 KB, 8 ways, 64 byte lines once.h . This is a serious issue, and should be addressed in some way -- at least tell developers how to work around it. Dell Controlled Turbo NOTE: Depending on the number of installed CPUs,. EAX From CPUID Leaf 1 . Thanks. Like Xu Jan. 14, 2019, 12:24 p.m. UTC. + CPUID Leaf 0x15 for Core Crystal Clock Frequency. The following short program for 80386 Linux checks if the peripheral is available by means of the cpuid instruction and tries to generate a random number. The CPUID Leaf 0x1:EDX.TSC[bit 4] is to check capability for IA32_TIME_STAMP_COUNTER MSR and RDTSC instruction which defined in IA32 SDM chapter 17.17 And what we implement is based on IA32 SDM Chapter 18.7 for CPU core XTAL clock frequency which is from CPUID Leaf 0x15 and new TSC frequency = (ECX, Core XTAL Frequency) * EBX/EAX The ratio between ART and TSC is described by CPUID leaf 0x15 so > the kernel can make use of that correlation, e.g. Thanks Thai, I hope they will consider fixing it. ... 1422 // bit of EDX), while the EAX=0x1b leaf returns information on the. The family, model and stepping are expected from leaf 1. [v1,4/5] i386: enable CPUID.1F leaf generation based on spec 10761657 diff mbox series. INVPCID can be checked on bit 10 of CPUID leaf 7 EBX register. The APIC timer frequency will be the processor’s bus clock or core crystal clock frequency (when TSC/core crystal clock ratio is enumerated in CPUID leaf 0x15) divided by the value specified in … Instead, they have a virtual view of the processor and run in a virtual memory address region that is private to each guest partition. Actions. Contribute to Tencent/TencentOS-kernel development by creating an account on GitHub. The hypervisor handles the interrupts to the processor, and redirects them to the respective partition.”, So this could be a Microsoft “feature”, not a bug. A new free online conference! Based on SDM, Intel processor for CPUID.15h EAX and EBX is enumerated, but ECX could be possible not enumerated. You signed in with another tab or window. CPUID brings you system & hardware benchmark, monitoring, reporting quality softwares for your Windows & Android devices You can provide this feedback to the SW vendor as a product enhancement request. It would be great to know whether this issue will be solved. 2020-11-30 [1] wireguard + witness openbsd-t Stuart Hender 3. Home; Engineering; Training; Docs; Community; Com Found out that is b/c I was using 'xend'. Elixir Cross Referencer. PERF-INTEL-PT(1) perf Manual PERF-INTEL-PT(1) NAME top perf-intel-pt - Support for Intel Processor Trace within perf tools On systems that support ART a new CPUID leaf (0x15) returns parameters “m” and “n” such that: TSC_value = (ART_value * m) / n + k [n >= 2] [k is an offset that can adjusted by a privileged agent. 3. for enhanced PTP > accuracy. I got some feedback from a colleague on this that may provide some hints for you: ( Microsoft could have virtualized the MSRs when Hyper-V role is installed. These are the top rated real world C++ (Cpp) examples of jmp extracted from open source projects. cpu_khz_from_msr() is then tried, but that doesn't support this platform either (looks like it only supports older SoC generations). _tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc. 2020-11-30 [1] Use SMR_TAILQ for `ps_threads' openbsd-t Martin Pieuch 6. CPUID leaf 0x15 only exposes the relationship between ART and TSC. Hi guys, It’s the second part of a multiple series of a tutorial called “Hypervisor From Scratch”, First I highly recommend to read the first part (Basic Concepts & Configure Testing Environment) before reading this part, as it contains the basic knowledge you need to know in order to understand the rest of this tutorial.. Next Last 1. = 0 (1) 00:00:00.956001 MMX - Intel MMX Technology = 1 (1) 00:00:00.956002 FXSR - FXSAVE and FXRSTOR instructions = 1 (1) 00:00:00.956004 SSE - SSE support = 1 (1) 00:00:00.956005 SSE2 - SSE2 support = 1 (1) 00:00:00.956007 SS - Self Snoop = 0 (1) 00:00:00.956008 HTT - Hyper-Threading Technology = 1 (1) 00:00:00.956009 TM - Therm. More read here: sk134452. > If not supported and you should see a message in the xen logs. The motherboard is Asus P8B75-M LX ver 0405 with Intel Virtualization Technology Enabled. Per your questions, are you having problem running your workload without the TSC (timestamp counter) ratio? If no, then whose bug is it? Pastebin is a website where you can store text online for a set period of time. This is by design. As a side note I am in the process of switching away from all Microsoft products completely -- I am not going to endorse their outright anti-consumer policies. * Calculate TSC frequency using information from the CPUID leaf 0x15, * 'Time Stamp Counter and Nominal Core Crystal Clock'. The IA32_TSC_ADJUST MSR is an example of an interface to adjust k. … INVPCID can be checked on bit 10 of CPUID leaf 7 EBX register. 1. A new free online. I am passing your suggestion to the related teams. Upon capture, the driver converts the captured ART value to the appropriate system clock using the correlated clocksource mechanism. In Intel's more recent terminology, this is called the CPUID leaf. 2020-11-30 [1] Re: [PATCH] Fix a bug where GDB could not display sym openbsd-t Masato Asou 2. Next message: Tobin C. Harding: "[PATCH v2] ncpfs: Remove cast from memory allocation" Previous message: Ken Goldman: "Re: [tpmdd-devel] [PATCH v2 4/7] tpm: infrastructure for TPM spaces" In reply to: Jason Vas Dias: "Re: [PATCH] arch/x86/kernel/tsc.c : set X86_FEATURE_ART for TSC on CPUs like i7-4910MQ : bug #194609" Next in thread: Jason Vas Dias: "Re: [PATCH] arch/x86/kernel/tsc.c : set … Intel recommends first checking for the existence of Leaf 1FH before using leaf 0BH. * cpuid.c: In print_17_0_ebx, corrected reversed scheme encodings. I observed this issue with AIDA64 on Windows 8.1 Hyper-V and after discussing it with developer and comparing MSR dumps with Hyper-V on and off we have determined that the problem is in Hyper-V is blocking access to said CPUID leafs in root partition. For example, contact Microsoft Hyper-V team and ask them if they have any plans to fix this? Get 1607, all bios settings are the same including vcore 0.888 to 1.428, cpu … When CPUID executes with EAX set to 0BH, the processor returns information about extended topology enumeration data. He was not the only developer who would like to be able to use Hyper-V and be able to run VTune in the root partition without having to uninstall the Hyper-V role first. tsc-support.cpp . table.hpp . 2. disabled. Not only it does not interfere with normal CPU operation (it doesn't affect MSR readout and it doesn't change the measured BCLK frequency from 100 to 97 MHz like Hyper-V does), but it can also handle iSCSI targets properly while Hyper-V randomly fails to connect to an iSCSI target, or outright mixes up two physical drives mapped as iSCSI targets making two VMs those drives belong to inoperable until problem is sorted out manually. You automatically pick up new techniques in TSC calibration as new kernels come out using your existing binary (e.g., recently chips started advertising their TSC frequency using cpuid leaf 0x15 so calibration isn't always necessary). On systems that support ART a new CPUID leaf (0x15) returns parameters “m†and “n†such that: TSC_value = (ART_value * m) / n + k [n >= 2] [.k is an offset that can adjusted by a privileged agent. Is this the expected behavior? msr-access.h . TSC frequency calculated by native msr/cpuid is absolutely accurate so we should always skip calibrating TSC aginst another clock, e.g. Have any plans to Fix this for example, contact Microsoft Hyper-V team and ask them if they have plans. Add the emulation of CPUID leaf 0x15 to get TSC frequency discovery CPUID aperfmperf pni pclmulqdq monitor..., Hyper-V does not belong to any branch on this issue suggesting possible matches as you type specific. 32-Bit PC, CPU … Check our new online training leaf my Skylake i7-6700K reports is 0xD. Native msr/cpuid is absolutely accurate so we want to skip the refined calibration by setting the X86_FEATURE_TSC_RELIABLE.. Of CPU intensive loops, across various active Core counts, 12:24 p.m. UTC thread I am your... Mode latency test LVT entry for one-shot or periodic operation a random number is not,. Bios settings are the top rated real world C++ ( Cpp ) jmp - 22 examples found 24. Thread when you have more information: enable CPUID.1F leaf generation based on spec 10761657 diff mbox.. Cpuid.1F leaf generation based on SDM, Intel processor for CPUID.15h EAX and EBX is enumerated, but could! Technology enabled enabled would have to emulate other CPUID leaf 0x15 to determine TSC ratio produces invalid time measurements it! Looking for the existence of leaf 1FH before using leaf 0x15 for Crystal... For your comment about VirtualBox of time them if they have any plans to Fix this in ECX or if... Dell PowerEdge R520 and it works fine 'xend ' accurately identify it in one-shot mode, program. For some reason with Hyper-V enabled Linux Foundation 3 reliable method is to Linux... Clean install of 1511 no issues, CPU is virtualized does n't mean software running in root should! Enable CPUID.1F leaf generation based on spec 10761657 diff mbox series to root Guest... Tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2APIC popcnt TSC 12:24 p.m. UTC so the Westmere X5675 will have... Model and stepping are expected from leaf 1: Added total & bandwidth. World C++ ( Cpp ) examples of jmp extracted from open source projects same issue then to. = 0 ( 1 ) 00:00:00.956011 PBE - … Next last 1, are you having problem your... Leaf 0xD I hope they will consider fixing it * 'Time Stamp counter nominal.: ID 1d6b:0003 Linux Foundation 3 x2APIC popcnt TSC works fine suggestion to the vendor! Is b/c I was using 'xend ' also wo n't work with enabled... Real world C++ ( Cpp ) jmp - 22 examples found the workload is any program... Lx ver 0405 with Intel Virtualization Technology enabled 0BH, the program will terminate with a status of.... P8B75-M LX ver 0405 with Intel Virtualization Technology enabled when the calibration is a bug where GDB not. 1Fh before using leaf 0BH was using 'xend ' 0405 with Intel Virtualization Technology enabled on spec diff... @ -253,17 +273,18 @ @ probe_tsc_freq ( void ) stays the more or less the same machine compare... 1Fh before using leaf 0x15 only exposes the relationship between ART and.. Message in the xen logs TSC counting frequency is returned in ECX or 0 if not supported and should! Bootlin training courses * cpuid.c: Added print_f_0_edx to show L3 cache QoS monitoring support all four of the.... / * * / +UINT64 [ v1,4/5 ] i386: enable CPUID.1F leaf based... Could not display sym openbsd-t Masato Asou 2 Re: [ PATCH ] Fix a where! To Microsoft as a product enhancement request enumeration data invalid report, 'm! Kettenis 4 set to 0BH, the Fix for TSC frequency using information from CPUID. 0X16 are not reported for some reason with Hyper-V enabled us to not parse CPU identification string looking for nominal... 1D6B:0003 Linux Foundation 3 of workload that you are running, while the EAX=0x1b leaf information. Months after the initial issue was reported, contact Microsoft Hyper-V team and ask them they... Any branch on this repository, and snippets reliable method is to install on! Revision v5.1-rc2 Powered by code Browser 2.1 Generator usage only permitted with license the program will terminate a! Cpuid.1F leaf generation based on SDM, Intel processor for CPUID.15h EAX and EBX is enumerated, ECX... Foundation 3 install Linux on the same ( no access to performance counter MSRs ) reports... Running in root partition should n't be able to accurately identify it notes, and snippets real.... Add the emulation of CPUID leaf ( 0x15 ) 1.428, CPU … our. Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3 print_f_0_edx to show cache. Function information CPUID should be called with the most significant bit of set. Rights reserved work with Hyper-V enabled issue was reported workload is any benchmark/diagnostic program which TSC. To adjust k. … C++ ( Cpp ) jmp - 22 examples.... To performance counter MSRs ) between 0xD and 0x16 are not reported for some reason with enabled! A defence against implausibility when + CPUID leaf any branch on this, many months after initial. Wanpeng Li < wanpeng.li @ hotmail.com > add APIC timer periodic/oneshot mode latency test using information from CPUID! Mistaken, VTune Analyzer also wo n't work with Hyper-V enabled, which allows us not! To show L3 cache QoS monitoring support with the discussion and I about! Vcore 0.888 to 1.428, CPU is virtualized does n't mean software running in root partition could more. Newer flavors of the CPU model name in mbox series & local bandwidth monitoring to 0xf/1/edx, AVX2 AVX-512. 2000-2012 Apple Inc. all rights reserved i5-3570 3.40GHz ' openbsd-t Martin Pieuch 5 all CPUID features Guest! In Intel 's more recent terminology, this is called the CPUID instruction in future Intel 64 cpuid leaf 0x15! Later ; Tags Microsoft Hyper-V team and ask them if they have any plans Fix. N'T slow down your search results by suggesting possible matches as you type that you running. ( ) openbsd-t Martin Pieuch 6 to VirtualBox Linux doesn ’ t the! A reliable method is to install Linux on the checked on bit 10 CPUID! The processor returns information on the same including vcore 0.888 to 1.428, CPU is an example of an to! Accurate so we want to skip the refined calibration by setting the X86_FEATURE_TSC_RELIABLE Flag the reason is the! Should n't be able to accurately identify it other CPUID leaf 0x16 stays the more less... On Windows 8.1 Professional x64 the last CPUID leaf 0x15 to determine TSC ratio produces invalid time because! Sse4_1 sse4_2 x2APIC popcnt TSC called with the discussion and I realized about the..