similar to: measuring a user's storage (in the db)

Hello, Recently I''ve received some complaints that there is excessive but intermittent latency of network traffic to domUs on some of my servers. Upon investigation it seems that on some servers, indeed traffic is occasionally delayed by up to 140ms where something like 5ms RTT would be expected. The average RTT is not unusual; since this is only occasional packets it only affects the

Hello, When approaching hosting providers for services, the first question many of them asked us was about the amount of IOPS the disk system should support. While we stress-tested our service, we recorded between 4000 and 6000 "merged io operations per second" as seen in "iostat -x" and collectd (varies between the different components of the system, we have a few such

On Fri, Jul 17, 2015 at 11:57 PM, Tal Lubko <tallubko at yahoo.com> wrote: > Hi Gene > > > It took me some time to check all the things you've asked. > Hope you still remember the case... > > 1) Compiling SYSLINUX with -j1 didn't help. > > The first error message I get is about missing header file. > I'll try to play a little bit with it to make it

On Wed, Jul 8, 2015 at 12:47 AM, Tal Lubko <tallubko at yahoo.com> wrote: > Hi Gene > > Thanks for your reply. > I'm trying to breakdown overall system boot time and to understand each > component duration. > My linux image is a ~10 MB bzImage file with the rootfs cpio'ed inside. > > I also have 2 BIOS images: > - some general purpose BIOS > - a custom

Every app we build has to be deployed, and the price has to be right. * dedicated servers start at 99$/m (Dreamhost, ..), and shared hosting go up to 47$/m (PlanetArgon) or 60$/m (TextDrive) * Railsplayground: 2$/m * TextDrive dedicated servers : 1000$/m Is there an objective way/tool to measure, test and compare the performance of the hosters? Alain

On Sun, Jul 12, 2015 at 3:35 AM, Tal Lubko <tallubko at yahoo.com> wrote: > Hi Gene > > > Thanks again for your help. > I'm using SYSLINUX 4.05 distributed by Ubuntu. > > For debugging I'm using SYSLINUX 6.03 because for some reason if I build SYSLINUX 4.05 from sources I get many compilation errors. If you make anything more than -j 1, you're probably

Hello, has anyone done any performance measuring of Linux Bridge + firewalling? I did search the net for a long time, to find out what would be the best way to measure the (maximum) performance/throughput. I didn't really come to a conclusion I'm satisfied with. Nevertheless I did create a small bridged test setup with 4 servers (gbit nics) and a linux bridge (2 x 100 mbit nic), all on

Hi, I am interesting how can I use the capabilities of ProSLIC to measure the following PSTN parameters: - Voltage (V) & Polarity (+-); - Current (A); - Frequency (Hz). Are there any ready for use tools? If there aren't ready for use tools how can I do the above measuring? Best Regards, Miroslav Nachev

Further pursuing my curiosity to measure the efficiency of R/C++ interface, I conducted a simple matrix-vector multiplication test using .C and .Call functions in R. In each case, I measured the execution time in R, as well as inside the C++ function. Subtracting the two, I came up with a measure of overhead associated with each call. I assume that this overhead would be non-existent of the entire

On Fri, Apr 24, 2020 at 02:33:13PM +0200, Michal Privoznik wrote: > On 4/24/20 6:38 AM, Vincent Wu wrote: > > > > The save format is fragile. At the beginning there is a header which > describes the file, then there is libvirt section (which contains the domain > XML and a cookie) and then there is QEMU section (where QEMU saved the guest > memory). Because of this, we

Hi Gene Thanks for your reply.I'm trying to breakdown overall system boot time and to understand each component duration. My linux image is a ~10 MB bzImage file with the rootfs cpio'ed inside. I also have 2 BIOS images:- some general purpose BIOS - a custom BIOS which loads real quick I'm using TSC to measure time. I'm not sure it's the best way (I've read about CPU's

On 16 May 2014 18:40, "Chandler Carruth" <chandlerc at google.com> wrote: > > Why not use the cycle count which perf exposes from hardware? That would seem even better to me, but data would be better. =] That's an interesting idea. However I'm concerned if that will miss some aspects of compiler optimization. For example frequent cache misses would have much smaller

Hi Some time ago I wrote this mailing list about some extra time that it takes for my system to boot and I don't know where it came from.I'm using a custom BIOS which loads at 1 second and now I've found out that it takes for the bootloader and OS an extra 1 second to load when keyboard is disconnected.I got from the BIOS engineer the following explanation and steps to take: In

On 16 May 2014 18:08, Hal Finkel <hfinkel at anl.gov> wrote: > ----- Original Message ----- >> From: "Yi Kong" <kongy.dev at gmail.com> >> To: "Hal Finkel" <hfinkel at anl.gov>, "Renato Golin" <renato.golin at linaro.org>, "Tobias Grosser" <tobias at grosser.es> >> Cc: "LLVM Dev" <llvmdev at

> ----- Original Message ----- > From: Gene Cumm <gene.cumm at gmail.com> > To: Tal Lubko <tallubko at yahoo.com> > Cc: For discussion of Syslinux and tftp-hpa <syslinux at zytor.com>; Geert Stappers <stappers at stappers.nl> > Sent: Tuesday, October 6, 2015 1:15 PM > Subject: Re: [syslinux] Measuring boot time > > On Mon, Oct 5, 2015 at 5:08 PM,

Hello Everyone I'd like to know what's the best way to measure syslinux functions duration.I know how to measure overall time (from syslinux start), but is there an easy way to break it down? Thanks,Tal

On Fri, 25 Feb 2005, Tanu Sharma wrote: > > Hey, > > I have written a pass and wishes to measure its performance overhead > after running it over a program.I also wish to measure the size of code > segment once the program is in native code.What are the easy ways in > llvm to achieve this?Are there any tools available in llvm for the same I'm not sure specifically

Hey, I have written a pass and wishes to measure its performance overhead after running it over a program.I also wish to measure the size of code segment once the program is in native code.What are the easy ways in llvm to achieve this?Are there any tools available in llvm for the same ?What exactly is this llvm-prof ? Thanks a lot , Tanu --------------------------------- Do you Yahoo!?

Hi Guys I''m trying to measure the traffic of domUs using vnstat without luck. My configuration: Debian 6.0.3 xen 4.0.1 vnstat 1.11 I''m using bonding with two network cards. auto bond0 iface bond0 inet manual slaves eth0 eth1 bond-mode active-backup bond-miimon 100 bond-updelay 200 bond-downdelay 200 bond-primary eth0 auto br0 iface br0 inet static

Hi all, I''m just starting to learn RoR, and would like to ask a question. I know that we can ''upload'' file from local machine and save it to a database. Now, say I have a photo which I store in other website (for example Flickr). This photo obviously has a URL pointing to it, e.g. http://www.flickr.com/username/photoname.jpg. How can I ''save'' this