similar to: timestamp in COM32 module

Hello, I'm preparing a update from a heterogen environment with the services OpenLDAP, Kerberos, Bind9, Samba 3.6 (NT-Domain), NFS4 to a Samba4 AD. I'm setting up a test environment with a separate DC and a file server. There are some questions about the file server which is a debian file server with some TB of data right now. The first question is, what to do with the existing TB of

I''m continuing to investigate the usage of rdtsc in userspace and whether there are programs "out there" that use it "unsafely" that might randomly break under Xen if rdtsc is not emulated, e.g. across a migration. Some have argued that nobody should use rdtsc and any programs that use rdtsc directly are "fundamentally broken" so the default for rdtsc

On 4/24/20 2:03 PM, Mike Stunes wrote: > I needed to allow RDTSC(P) from userspace and in early boot in order to > get userspace started properly. Patch below. > > --- > SEV-ES guests will need to execute rdtsc and rdtscp from userspace and > during early boot. Move the rdtsc(p) #VC handler into common code and > extend the #VC handlers. Do SEV-ES guests _always_ #VC on

On 4/24/20 2:03 PM, Mike Stunes wrote: > I needed to allow RDTSC(P) from userspace and in early boot in order to > get userspace started properly. Patch below. > > --- > SEV-ES guests will need to execute rdtsc and rdtscp from userspace and > during early boot. Move the rdtsc(p) #VC handler into common code and > extend the #VC handlers. Do SEV-ES guests _always_ #VC on

Fairly straightforward code motion of MSR / TSC / PMC accessors to the sub-arch level. Note that rdmsr/wrmsr_safe functions are not moved; Linux relies on the fault behavior here in the event that certain MSRs are not supported on hardware, and combining this with a VMI wrapper is overly complicated. The instructions are virtualizable with trap and emulate, not on critical code paths, and only

Fairly straightforward code motion of MSR / TSC / PMC accessors to the sub-arch level. Note that rdmsr/wrmsr_safe functions are not moved; Linux relies on the fault behavior here in the event that certain MSRs are not supported on hardware, and combining this with a VMI wrapper is overly complicated. The instructions are virtualizable with trap and emulate, not on critical code paths, and only

On Tue, Sep 18, 2018 at 12:41:57PM +0200, Thomas Gleixner wrote: > On Tue, 18 Sep 2018, Thomas Gleixner wrote: > > On Tue, 18 Sep 2018, Thomas Gleixner wrote: > > > On Tue, 18 Sep 2018, Peter Zijlstra wrote: > > > > > Your memory serves you right. That's indeed observable on CPUs which > > > > > lack TSC_ADJUST. > > > > > >

On Tue, Sep 18, 2018 at 12:41:57PM +0200, Thomas Gleixner wrote: > On Tue, 18 Sep 2018, Thomas Gleixner wrote: > > On Tue, 18 Sep 2018, Thomas Gleixner wrote: > > > On Tue, 18 Sep 2018, Peter Zijlstra wrote: > > > > > Your memory serves you right. That's indeed observable on CPUs which > > > > > lack TSC_ADJUST. > > > > > >

Hi, I am trying to correlating performance issue in guest VM with the scheduling trace from Xentrace. User-mode application in guest VM periodically dump APIC ID and RDTSC into trace. I also start Xentrace in Dom0 during the same period. However, I notice that range of TSC values report both trace is completely disjointed. TSC values from Xentrace is always greater than what guest VM see, even

Hi: I intend to use RDTSC to make some time tests in Xen guest WinXP. However, from Intel Developer''s Manual I noticed that RDTSC will cause VMExit if "RETSC exiting" VM-Execution control field is 1. So I wonder: How to query VM-Execution control field in a programmable way? BTW: On Intel Developer''s Manual, it mentioned a method using IA32_VMX_PROCBASED_CTLS MSR,

Hello everybody, sorry for stupid qustion, but I have following problem: I succesfully installed Dovecot on Debian (from source). Now I want to run it. I tryed: # /usr/local/dovecot/sbin/dovecot # but nothing happened: # ps -Af | grep dove ....... ps -Af | grep dove # What is wrong? I want Dovecot to serve POP3 over SSL. Many thanks and sorry again :o)

Hello, My name is Ick Hoon Jin and I am Ph. D. student in Texas A & M Univ.. When I run the C embedded in R in the Linux system, I confront the following error after 6,000 iteration. By googling I found this error is from the problem in C. *** caught segfault *** address (nil), cause 'memory not mapped' My C code is following:

# HG changeset patch # User Ian Campbell <ian.campbell@citrix.com> # Date 1320922479 0 # Node ID bc79b560aafa1e4dc42af00e6a326dc651b5636a # Parent 460b507e15f864dd6712f5040e36538d6e076ae4 libxl: use named options for tsc_mode. It seems that this knob is expoerted from the hypervisor as a raw integer (no symbolic names) documented in xen/include/asm-x86. Propagating that all the way to the

Set pv_time_ops.sched_clock to vmware_sched_clock(). It is simplified version of native_sched_clock() without ring buffer of mult/shift/offset triplets and preempt toggling. Since VMware hypervisor provides constant tsc we can use constant mult/shift/offset triplet calculated at boot time. no-vmw-sched-clock kernel parameter is added to switch back to the native_sched_clock() implementation.

Hi Folks, I want to calculate latency in transferring a buffer from domU kernel to dom0 kernel and vice versa. for that I need a time ''flavour'' (cycle counter time?) which reads the same in dom0 and domU. Could someone please let me know if cycle counter time is the right time to use? if not then which one (system time or wall clock time)? Also could someone please tell me how to

From: Gene Cumm <gene.cumm at gmail.com> COM32: Improve opendir() to deal with no '/' at end of string Signed-off-by: Gene Cumm <gene.cumm at gmail.com> --- Originally, this was going to be 3 patches but I ended up doing a little more. Currently, the COMBOOT call required a '/' to recognize that you're searching for a directory. This checks and automatically

This module is able to power off a system via APM. It replaces the poweroff COMBOOT module. Signed-off-by: Sebastian Herbszt <herbszt at gmx.de> --- com32/modules/Makefile | 2 +- com32/modules/poweroff.c | 88 ++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 89 insertions(+), 1 deletions(-) create mode 100644 com32/modules/poweroff.c diff --git

On Fri, Sep 19, 2014 at 11:30 AM, Christopher Covington <cov at codeaurora.org> wrote: > On 09/17/2014 10:50 PM, Andy Lutomirski wrote: >> Hi all- >> >> I would like to standardize on a very simple protocol by which a guest >> OS can obtain an RNG seed early in boot. >> >> The main design requirements are: >> >> - The interface should be

On Fri, Sep 19, 2014 at 11:30 AM, Christopher Covington <cov at codeaurora.org> wrote: > On 09/17/2014 10:50 PM, Andy Lutomirski wrote: >> Hi all- >> >> I would like to standardize on a very simple protocol by which a guest >> OS can obtain an RNG seed early in boot. >> >> The main design requirements are: >> >> - The interface should be

For several years now, I've been using Syslinux/Isolinux to load boot systems and love it. At times, I've messed up making a config file or forgotten the name of a file on the CD (or USB flash drive) and didn't want to take the time to load the CD into another machine or boot a DOS or Linux OS to search. The ability to browse the CD/USB drive would prove beneficial in these