similar to: libasan bug: pthread_create never returns

On Thu, 10 Aug 2023, Cedric Blancher wrote: >We're experiencing rather very bad latency spikes on busy Linux >systems, for example if one machine is the jumphost (ssh -J) for a few >hundred connections, while at the same time handles CPU intensive >tasks. > >Would RT/Linux SCHED_FIXED or SCHED_RR be of help in such a case, e.g. Did you already check the old and tried method

Good morning! We're experiencing rather very bad latency spikes on busy Linux systems, for example if one machine is the jumphost (ssh -J) for a few hundred connections, while at the same time handles CPU intensive tasks. Would RT/Linux SCHED_FIXED or SCHED_RR be of help in such a case, e.g. put all ssh processes into the SCHED_FIXED scheduling class, with a priority higher than the

Can some help me spot what I'm doing wrong here. I have two equations, one a michalis-menton eqn and one a straight line. I need to work out where they cross. I created the function: solveEqn<-function(x,vals){ Vmax<-vals[1] Ks<-vals[2] m<-vals[3] c<-vals[4] diff<-0 mmVal<-exp(Vmax+x/(Ks+x)) slVal<-x*m+c diff<-mmVal-slVal return(diff) } >

Dear all, I want to run a process in a container with a real-time (RT) priority. When the sched_setscheduler(0, SCHED_RR, &sparam) is called in the container, an error is reported which is "operation not permitted" I had added the following line in the file /etc/security/limits.conf for both the host and the container, which means allowing all users to change the priority of the

Dear all, I want to setup a privileged container, which means I can set the priority of a process to SCHED_RR (real-time) dynamically by calling sched_setscheduler() in a C program running on a container. In my system (host: fedora19, container: fedora19, libvirt 1.2.5), my C code reports "operation not permitted" when sched_setscheduler() is called. I found a link

Hello, I'm trying to compile a brand new CVS Asterisk and running into trouble with include files. I have an older version of Asterisk that I can compile (2-3 months old) that I can compile fine, but the new one gives me this: make[1]: Leaving directory `/home/matt/asterisk_update/stdtime' if [ -d CVS ] && ! [ -f .version ]; then echo CVS-10/01/03-13:06:31 > .version; fi

Hi, I was working on multithreading a cross iteration loop. I want to insert a pthread_create function call and use other pthread functions into my LLVM IR. Issue is how do i get these functions using module->getOrInsertFunction("pthread_create"), since the function might not be there in IR and then insert function calls to these functions. So, crux is how do i call pthread

Hi I was asking about the fedora 14 kernel if it is good enough for cgroup usage because I am trying to set a cgroup under cpu subsytem ( /dev/cgroup/cpu/group1/ ) that have /cpu.rt_runtime_us of 100000 while cpu.rt_period_us has a value of 1000000 i.e a ratio of 1/10 . still when I run a task (endless loop) in that group (cgexec -g cpu,cpuset:group1 ./test) it gets all the cpu core time

Enough small fixes have pilled up to make it worth a release: A Google patch adds sched_setaffinity, sched_getaffinity support. Openembedded uses kexec_load(). Gentoo folks add a Kbuild fix. ipconfig no longer wild guesses a nameserver when none is provided by the DHCP server. strndup() and unlinkat() saw fixes for various problems. codingstyle cleanup in kinit and tools. git repository:

Hi All, Thanks for all your discussions which I read offline and enhance my knowledge. I just want to know how to make yield curve by bootstrapping using R. Please give me some subject-matter links and code links. Especially the Spot Yield Curve and YTM Curve. Sayonara With Smile & With Warm Regards :-) G a u r a v Y a d a v Senior Executive Officer, Economic Research &

On a multicore Linux platform I'm running a simple c test program, to evaluate xapian performance, and inspect advantages in multiple indexing. I'm starting two threads, and each thread writes to his database. main th -> indexing thread_1 -> db1 (dispatcher) -> indexing thread_2 -> db2 I use sched_setaffinity to bind each indexing thread to a specific core.

This patch supports to fix lock holder preemption issue. For kernel users, we could use bool vcpu_is_preempted(int cpu) to detech if one vcpu is preempted or not. The default implementation is a macro defined by false. So compiler can wrap it out if arch dose not support such vcpu pteempted check. Suggested-by: Peter Zijlstra (Intel) <peterz at infradead.org> Signed-off-by: Pan Xinhui

Hello, According to the docs, vcpupin will use either cgroups or sched_setaffinity to pin vcpu threads to cpus. How is this decision made? I observe differences even on different hosts featuring the same version of libvirtd (1.3.1): on one host vcpupin affects cpuset.cpus (cgroup), and on the other it affects vcpu threads affinity (observed through taskset). Thanks, Nikos -------------- next

On Wed, Sep 05, 2018 at 03:48:45PM +0300, Nikos Anastopoulos wrote: >Hello, > >According to the docs, vcpupin will use either cgroups or sched_setaffinity >to pin vcpu threads to cpus. How is this decision made? >I observe differences even on different hosts featuring the same version of >libvirtd (1.3.1): on one host vcpupin affects cpuset.cpus (cgroup), and on >the other it

Hi all, I have a problem with cpu affinity in my R-2.11.1 installation compiled against ATLAS running on a Linux (Ubuntu 10.04) cluster under GridEngine. I wish to use Grid Engine's core binding feature to bind user processes into the number of cores they request on the cluster, thus preventing badly behaved multi-threaded libraries from consuming more cores than requested. An example of

The Wine development release 1.3.15 is now available. What's new in this release (see below for details): - Support for changing network passwords. - Reflection support in shader compiler. - Tests no longer attempt to cope with Win9x behavior. - A number of MSHTML and MSXML improvements. - Various bug fixes. The source is available from the following locations:

We've been using libvirt based containers under CentOS 7 and everything has been working fine. One application we run in our containers is ctdb, which uses SCHED_FIFO (real time) threads. This has been working without problems until our recent upgrade to CentOS 7.3. For some reason, ctdb is no longer able to create real time threads, and I've tried a simple program myself that

Add some kind of vblank workers. The interface is similar to regular delayed works, and is mostly based off kthread_work. It allows for scheduling delayed works that execute once a particular vblank sequence has passed. It also allows for accurate flushing of scheduled vblank works - in that flushing waits for both the vblank sequence and job execution to complete, or for the work to get cancelled

From: Ville Syrj?l? <ville.syrjala at linux.intel.com> Add some kind of vblank workers. The interface is similar to regular delayed works, and also allows for re-scheduling. Whatever hardware programming we do in the work must be fast (must at least complete during the vblank, sometimes during the first few scanlines of vblank), so we'll fire up a per-crtc high priority thread for

Add some kind of vblank workers. The interface is similar to regular delayed works, and is mostly based off kthread_work. It allows for scheduling delayed works that execute once a particular vblank sequence has passed. It also allows for accurate flushing of scheduled vblank works - in that flushing waits for both the vblank sequence and job execution to complete, or for the work to get cancelled