search for: overestimating

Hi folks, Warning: I don't know if the result I am getting makes sense, so this may be a statistics question. The fitted values from my binomial lmer mixed model seem to consistently overestimate the cell means, and I don't know why. I assume I am doing something stupid. Below I include code, and a binary image of the data is available at this link:

Hi all, While tinkering with saturation instructions, I hit problems with the cost model calculations. The loop vectorizer cost model accumulates the individual TTI cost model of each instruction. For saturating arithmetic, this is a gross overestimate, since you have 2 sexts (inputs), 2 icmps + 2 selects (for the saturation), and a truncate (output); these all fold alway. With an intrinsic,

Hello, I have a question about persp function: I made my classical matrix with x, y and z variables and I dont know why I obtain a 3D image with overestimate heights. Here is my script: microtopo = read.csv2("topo2.csv", dec=".") attach(microtopo) require(akima) # for persp or zz <-interp (x, y, z) persp(zz) See also my attach file Thanks, Best regards JS

Hi, I've managed to acquire a few Cisco handsets (7905, 7920) and would like to use them with Asterisk. Rather than simply switching to the SIP firmware I thought I'd use these with chan_skinny - partly because this is Cisco's primary firmware and therefore the phones might be more stable, and partly to help test chan_skinny as it seems to be generally underused. (Is functionality

There’s a few passes in LLVM that make heavy use of a big DenseMap, one that potentially gets filled with up to 1 entry for each instruction in the function. EarlyCSE is the best example, but Reassociate and MachineCSE have this to some degree as well (there might be others?). To put it simply: at least in my profile, EarlyCSE spends ~1/5 of its time growing DenseMaps. This is kind of… bad.

I finally found a solution to our problem. I think some people running like us a combination CentOS 64 bits\Sun Grid Engine, could encounter the same situation. Here is a detailed explanation, hope it can be useful to someone! The file /usr/lib/locale/locale-archive is a memory-mapped file used by glibc (the gnu C library). This file contains the languages used over the system (for instance, man

Thanks Reid - I'm on Windows. I guess I just assumed I was missing something obvious in how to hook up the JIT and disassembler! Given the nice looking disassembly code I found, I thought people would be doing it all the time :-) b. On Tue, Jul 6, 2010 at 8:41 PM, Reid Kleckner <reid.kleckner at gmail.com> wrote: > If you're on a recent flavor of Linux, you may be able to just

Hello, I've been trying to add support to the integrated assembler to handle cases like below foo:instr; .if . - foo; instr; .endif when the dot symbol and foo are assigned to consecutive MCDataFragments <https://github.com/ClangBuiltLinux/linux/issues/744>. I have a patch <https://reviews.llvm.org/D6941> under review. And even though it seems to solve the problem, the concern

...pecifies the alignment of the operation (that is, the alignment of the memory address). A value of 0 or an omitted align argument means that the operation has the preferential alignment for the target. It is the responsibility of the code emitter to ensure that the alignment information is correct. Overestimating the alignment results in undefined behavior. Underestimating the alignment may produce less efficient code. An alignment of 1 is always safe." -- With best regards, Anton Korobeynikov Faculty of Mathematics and Mechanics, Saint Petersburg State University

...the > operation (that is, the alignment of the memory address). A value of 0 > or an omitted align argument means that the operation has the > preferential alignment for the target. It is the responsibility of the > code emitter to ensure that the alignment information is correct. > Overestimating the alignment results in undefined behavior. > Underestimating the alignment may produce less efficient code. An > alignment of 1 is always safe." > > After reading the description, I am left wondering why LLVM has this feature and for what it is intended to be used. My best...

Hello, I have some C code (for a shared lib called via .External) that uses PROTECT(w= allocMatrix(REALSXP, m, n)); mostly successfully. In rare cases, though, the row count m will be an overestimate. Is there a way to reallocate the matrix in-place, something like reAllocMatrix (w,m-excess,n) /* where excess is > 0 */ to chop off the last excess rows of w? I only find out about the

If you're on a recent flavor of Linux, you may be able to just go into gdb and type "disas <pointer-to-JITed-code>". More detail here: http://llvm.org/docs/DebuggingJITedCode.html If you still want to do it programmatically, I think you might be stuck. IIRC the length known by the JIT memory allocator is an overestimate (it's rounded up for alignment), so the

In the insrtuction %1 = load i32** %y_addr, align 4 what is the meaning of align 4?? Can anyone explain? -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20100716/ef433d43/attachment.html>

What should we use instead of DenseMap? —escha > On Mar 15, 2016, at 3:30 PM, Xinliang David Li <xinliangli at gmail.com> wrote: > > yes it makes sense. Avoid using DenseMap when the size of the map is expected to be large but can not be pre-determined. > > David > > On Tue, Mar 15, 2016 at 3:07 PM, via llvm-dev <llvm-dev at lists.llvm.org <mailto:llvm-dev at

I have a small model running under R. This is basically running various power-law relations on a variable (in this case water level in a river) changing spatially and through time. I'd like to include some kind of error propagation to this. My first intention was to use a kind of monte carlo routine and run the model many times by changing the power law parameters. These power laws were

Hi, With the new llvm-mc code for disassembling, what is the recommended way to disassemble the final code produced by a JIT compiler backend? (Eg. in the toy.cpp example from the tutorial). I can get the void* for the final code, but I don't know its length - superficially at least it appears I need to know the length to disassemble it as a buffer? Thanks b.

Hi R-helpers, Does anyone know why adding which() makes the select call more efficient than just using logical selection in a dataframe? Doesn't which() technically add another conversion/function call on top of the logical selection? Here is a reproducible example with a slight difference in timing. # Surrogate data - the timing here isn't interesting urltext <-

Hi, I am trying to get the maximum likelihood estimator for lognormal distribution with censored data;when we have left, interval and right censord. I built my code in R, by writing the deriving of log likelihood function and using newton raphson method but my estimators were too high " overestimation", where the values exceed the 1000 in some runing of my code. is there any one can

Hello, I would like to run a script over a speex file which determines, how long the speech contained in the speex file is. So I run through the ogg file, skip the first two ogg _pages_ (speex header and comment header, both contain IMHO only 1 ogg _packet_), and then count in any ogg page the number of the ogg _frames_ (which, unless I used -nframes while encoding, which I did not), and multiply

On Wed, Dec 18, 2019 at 3:38 AM Iurii Gribov via llvm-dev < llvm-dev at lists.llvm.org> wrote: > (Readding Hal) > > > Are you suggesting that we should be more aggressive by default (i.e. > without -fvisibility=hidden or any new options)? > > I believe that will be too aggressive for class LTO visibility. > > It is common to override a virtual functions across