Displaying 20 results from an estimated 10000 matches similar to: "Scalar vs. vector"
2007 Feb 21
2
how much performance penalty does this incur, scalar as a vector of one element?
I have been comparing R with other languages and systems. One peculiar feature of R is there is no scalar. Instead, it is just a vector of length one. I wondered how much performance penalty this deign cause, particular in situations with many scalars in a program. Thanks.
Jason Liao, http://www.geocities.com/jg_liao
Associate Professor of Biostatistics
Drexel University School of Public
2012 Mar 07
0
[LLVMdev] Scalar replacement of arrays
On Wed, Mar 7, 2012 at 12:47 PM, Nicolas Capens
<nicolas.capens at gmail.com> wrote:
> Hi all,
>
> I'm implementing a virtual processor which features dynamic register
> indexing, and I'm struggling to make LLVM 3.0 produce good code for it.
> The register set is implemented as an LLVM array so it can be
> dynamically indexed using GEP. However, most of the time the
2012 Mar 07
2
[LLVMdev] Scalar replacement of arrays
Hi all,
I'm implementing a virtual processor which features dynamic register
indexing, and I'm struggling to make LLVM 3.0 produce good code for it.
The register set is implemented as an LLVM array so it can be
dynamically indexed using GEP. However, most of the time the virtual
processor's registers are just statically indexed, and so I
expected/hoped the code would be as
2014 Jul 26
2
Concern: rsync failing to find some attributes in a file transfer?
I have a regular script I run to make static "snapshots" of my home
file system, with each being all the files that changed in the past 24
hours.
I just moved my home partition to a new harddisk w/more space.
I ran the util and have gotten odd results each time I ran it.
This one bothers me... as I'm not sure why the attrs would be missing.
How can the names be transfered but no
2015 Nov 10
2
One element vectors versus scalars
I am curious as to why LLVM has explicit support for 1 element vectors, for
example 'v1i32'. Are there some contexts where handling a value as a 1
element vector can yield better code quality than the corresponding scalar
'i32'?
Thanks,
MartinO
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2012 Mar 09
1
[LLVMdev] Scalar replacement of arrays
Nicolas Capens wrote:
> [...]
> I'm not sure if that's going to help achieve optimal code
> for when the array is sometimes being dynamically indexed.
> Essentially there should be some kind of store to load copy
> propagation. As far as I know that's exactly what mem2reg
> does, except that it only considers scalars and not elements
> of arrays.
>
> So would
2008 Apr 01
12
DO NOT REPLY [Bug 5365] New: --backup and --xattrs are not compatible
https://bugzilla.samba.org/show_bug.cgi?id=5365
Summary: --backup and --xattrs are not compatible
Product: rsync
Version: 3.0.0
Platform: x86
OS/Version: Other
Status: NEW
Severity: normal
Priority: P3
Component: core
AssignedTo: wayned@samba.org
ReportedBy: fauthier@free.fr
2013 Feb 21
2
[LLVMdev] Generate scalar SSE instructions instead of packed instructions
On Thu, Feb 21, 2013 at 12:14 PM, Nadav Rotem <nrotem at apple.com> wrote:
> You can change the input LLVM-IR.
>
> On Feb 21, 2013, at 7:16 AM, "Nowicki, Tyler" <tyler.nowicki at intel.com>
> wrote:
>
> Hi,****
>
> ** **
>
> I am interested in evaluating the performance of packed vs scalar
> double-precision floating point instructions on
2010 Aug 19
2
[LLVMdev] sret on scalars
I am needing to return i128 as a shadow return due to abi issues on
alpha. The problem I am running into is the code for doing that with
scalars (currently only used for vectors, as far as I can tell) sets
the sret on the parameter. If I just go this path, then I am setting
sret on an integer pointer, which verify objects too. LangRef doesn't
say scalars are allowed to have sret set, but
2010 Aug 23
0
[LLVMdev] sret on scalars
On Aug 19, 2010, at 1:38 PM, Andrew Lenharth wrote:
> I am needing to return i128 as a shadow return due to abi issues on
> alpha. The problem I am running into is the code for doing that with
> scalars (currently only used for vectors, as far as I can tell) sets
> the sret on the parameter. If I just go this path, then I am setting
> sret on an integer pointer, which verify
2012 Oct 07
2
[OT] How do I convert maildir to bsmtp format?
Here's what I'm trying to do. I have a spam filtering operation as a
front end for other servers. I've created a virtual server for spam
storage where the user will be able to log in using squirrelmail/dovecot
to review and release their spam. The email is stored in maildir format.
Piecing it together I can use squirrelmail to pipe the email into
something so that if a use finds a
2001 Sep 23
2
destination dir doubles in size
I am using Rsync to mirror my primary drive to a mounted second drive. I am
using a crontab to control it:
30 3 * * * /usr/bin/rsync -rpogl /* /mnt/backup2/systemBackup/
The first run seems fine. But the subsequent running seems to double the
original directory size. I notice this by running df -k. The destination
size increases two fold, as if each time Rsync runs, it repeats itself,
rather
2012 Feb 28
6
Cleaning up messy Excel data
Unfortunately, some data I need to work with was delivered in a rather messy Excel file. I want to import into R and clean up some things so that I can do my analysis. Pulling in a CSV from Excel is the easy part.
My current challenge is dealing with some text mixed in the values.
i.e. 118 5.7 <2.0 3.7
Since this column in Excel has a "<2.0" value, then R reads the
2005 Sep 11
4
Returned mail: see transcript for details (fwd)
Every post I do to this mailinglist is followed by a bounce message from
"centos.5.warren at recursor.net".
I have no clue why this is being send to me, afaics some IP address is
being blacklisted but I am not related to it.
Am I the only one who gets this and can we remove this person from the
mailinglist ?
Kind regards,
-- dag wieers, dag at wieers.com, http://dag.wieers.com/
2013 Dec 09
5
Btrfs questions
i am looking at using btrfs for a new project and i have a few questions:
* i have heard that as it currently stands Btrfs has some issues to be used as a Lustre file system; is he aware of the issues and any plans to address these and integrate Btrfs in to Lustre
* any plans to support native clustering on Btrfs
* on ZFS the ZIL is a separate device, any plans to implement a the
2009 Aug 21
1
applying summary() to an object created with ols()
Hello R-list,
I am trying to calculate a ridge regression using first the *lm.ridge()*
function from the MASS package and then applying the obtained Hoerl
Kennard Baldwin (HKB) estimator as a penalty scalar to the *ols()*
function provided by Frank Harrell in his Design package.
It looks like this:
> rrk1<-lm.ridge(lnbcpc ~ lntex + lnbeerp + lnwinep + lntemp + pop,
subset(aa,
2009 Apr 11
2
[Bridge] Building a Raw Bridge
I'm having trouble figuring out how to make a bridge that does not block
forwarding of packets when there is no receive channel in the same
bridge. The reason I want to do this is that the return path is via
another circuit. The two directions are on two different radios. I would
think this would be like the response given to someone in July 2007
about setting a "hub" mode by
2017 Feb 10
1
dovecot config for 1500 simultaneous connection
"Rajesh M" <24x7server at 24x7server.net> writes:
> during peak times here are the results for connections
>
> [root at ns1 domains]# doveadm who |grep imap |wc -l
> username # proto (pids) (ips)
> 631
> [root at ns1 domains]# doveadm who |grep pop3 |wc -l
> username # proto (pids)
2001 Mar 10
3
fatal signal 11
I downloaded the latest wine from the cvs site and ran its
./tools/wineinstall. It ran for quite a while and croaked on
/wine/server/semaphore.c. Basically, gcc says "Internal compiler error:
program cc1 bog fatal signal 11". The compiler is 2.91.66 (aka egcs-1.1.2
release) and compiles other programs including 2.4.1 & 2.4.2 Linux kernels
just fine. I am puzzled what 'fatal
2000 May 19
7
variance of a scalar (PR#546)
I was surprised to find that the variance of a scalar, using
var(), is NA. Surely this should be zero?
Cheers, Jonathan.
--please do not edit the information below--
Version:
platform = sparc-sun-solaris2.7
arch = sparc
os = solaris2.7
system = sparc, solaris2.7
status = Patched
major = 0
minor = 99.0
year = 2000
month = February
day = 9
language = R
Search Path:
.GlobalEnv,