This is the mail archive of the cygwin@sources.redhat.com mailing list for the Cygwin project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]

Re: Cygwin Performance Info


From your response it sounds like if I have a compute bound application, i.e.
one that does not make system calls, there is no hit.  However, what about
memory allocation and deallocation?

Chris Abbey wrote:

> At 19:23 10/13/00 -0400, Laurence F. Wood wrote:
> >Can someone tell me where the performance hit is in cygwin unix
> >emulation?
>
> whichever part you use the most inside your tightest inner loop.
>
> seriously.
>
> that's a big huge open ended question (not about cygwin, about ANY
> library/platform) that is as specific to your application as you can
> get. For example, if you spend 75% of your computing day manipulating
> text files and piping them and greping them and running file utils
> against them then the cr/lf translation may be a big hit for you.
> On the otherhand if most of your computation in a day is spent answering
> requests that come in on tcp/ip sockets then the remapping of winsock
> to netinet.h functions maybe your major headache. (note, I'm not trying
> to imply that either function has a performance problem, merely that they
> would be representative places that would have high invocation counts
> in the course of the given activity.)
>
> To really answer that for your application/workload then you need to
> get some form of performance detailing that can tell you how much time
> you are spending in any given method and how often it's called.
>
> --
> Want to unsubscribe from this list?
> Send a message to cygwin-unsubscribe@sourceware.cygnus.com
begin:vcard 
n:Wood;Laurence
tel;fax:732-701-9748
tel;work:732-701-9746
x-mozilla-html:FALSE
url:www.sunyatasystems.com
org:Sunyata Systems Corporation
adr:;;;;;;
version:2.1
email;internet:LaurenceWood@SunyataSystems.com
title:Chief Science Officer
fn:Laurence
end:vcard

--
Want to unsubscribe from this list?
Send a message to cygwin-unsubscribe@sourceware.cygnus.com

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]