search for: opimizations

Displaying 8 results from an estimated 8 matches for "opimizations".

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2005 May 01
1
opimization problem
hi, i want to execute the following opimization problem: max r*w s.t.: w*z=1 # sum of w is 1 r, w are [nx1] vectors, z is a [nx1] vector consisting of 1 so far so good, works fine with lp the problem arises with the additional restriction w' * V * w where V is a [nxn] matrix how can i include this restriction since w arises twice? thanks, gg --
2005 May 01
3
Roots of quadratic system.
Hello, I have a system of quadratic equations (results of a Hamiltonian optimization) which I need to find the roots for. Is there a package and/or function which will find the roots for a quadratic system? Note that I am not opimizing, but rather solving the first order conditions which come from a Hamiltonian. I am basically looking for something in R that will do the same thing as fsolve in
2006 Aug 03
2
Index.optimize
In the documentation, it says that optimize "should only be called when the index will no longer be updated very often, but will be read a lot". Does this mean it actually has a detrimental impact on updates and inserts? In my project there will be many more reads than updates, but there will still be a lot of updates. So should I be calling Optimize once a day or something like that,
2008 Jun 11
1
difference between nlm and nlminb
Hi, I was wondering if someone could give a brief, big picture overview of the difference between the two optimization functions nlm and nlminb. I'm not familiar with PORT routines, so I was hoping someone could give an explanation. Thanks, Angelo _________________________________________________________________ Instantly invite friends from Facebook and other social networks to join yo
2004 Dec 08
0
[LLVMdev] Re: Question about LLVM
...n IR, does it refer to LLVM assembly language > or to LLVM bytecode? Both. They are semantically equivalent. In particular, the in-memory compiler IR is exactly equivalent to the text and binary forms, they are jut expressed in different ways. > - In what form does LLVM (gccas) perform opimizations? Is it in LLVM assembly > or LLVM bytecode? gccas reads the text form into the in-memory form, does optimizations on the in-memory IR, then writes out the result in compressed bytecode format. > - Is there any way to dump the IR before and after each optimization? Yes, gccas is just a s...
2006 Aug 05
0
Memory Usage after upgrading to pre-release and removing sendfile
After the upgrade my memory usage is shown like this: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 4592 flipl 16 0 197m 150m 2360 S 0.0 14.9 6:17.28 mongrel_rails 4585 mongrel 16 0 190m 140m 1756 S 0.0 13.9 0:52.86 mongrel_rails 4579 mongrel 16 0 200m 157m 1752 S 0.0 15.5 0:56.31 mongrel_rails 4582 mongrel 16 0 189m 139m 1752 S 0.0 13.8
2019 Feb 05
2
clang emits calls to consexpr function.
Hi Devs, consider below testcase $cat test.cpp constexpr int product() { return 10*20; } int main() { const int x = product(); return 0; } $./clang test.cpp -std=c++11 -S $./clang -v clang version 9.0.0 Target: x86_64-unknown-linux-gnu $cat test.s main: .cfi_startproc # %bb.0: pushq %rbp .cfi_def_cfa_offset 16 .cfi_offset %rbp, -16 movq
2008 Jun 17
2
[LLVMdev] VFCmp failing when unordered or UnsafeFPMath on x86
Hi Nate! I don't see how that would work. Select doesn't work per element. Say we're trying to vectorize the following C++ code: if(v[0] < 0) v[0] += 1.0f; if(v[1] < 0) v[1] += 1.0f; if(v[2] < 0) v[2] += 1.0f; if(v[3] < 0) v[3] += 1.0f; With SSE assembly this would be as simple as: movaps xmm1, xmm0 // v in xmm0 cmpltps xmm1, zero // zero =