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RE: [boost] high_resolution_timer \ timer featurerequests forBoost.Timerr
by Brian Braatz 05 Mar '05

05 Mar '05

> -----Original Message----- > On Behalf Of James Fowler > Sent: Friday, March 04, 2005 1:10 PM > Brian Braatz wrote: > > >First off- note that Timer can take a start time on the ctor: ... > > > >high_resolution_timer does not however: ... > > > > high_resolution_timer() { ... > > if (!QueryPerformanceFrequency(&frequency)) > > throw std::runtime_error("Couldn't acquire frequency"); > >... > > > >MY PROBLEM: > > I need to feed the timer the START time (or get FROM it the start > >time would be preferred) > > > >The reason I need this is because for logging purposes (working with the > >Profiler from Christopher Diggins) I need to log the start and stop > >times, and I need it to (for internal cross reference) be the same > >number for multiple purposes. > > [Brian Braatz Writes:] My most basic problem is high_resolution_timer and boost.timer have different interfaces, one takes a time to start with the other does not. I realize the high_resolution_timer is windows only and I realize that the struct it uses to store the time is windows specific. At the simplest level I am asking for this: Have both high_resolution_timer and timer support: * Typedef's for the internal TYPE * Same construction interface using that type * Accessor method to GET to the internal data Then I could accomplish what I am trying to do- I am not just measuring things, but putting a layer on top. I can live with the issues with timers. What I am after is being able to do this- Record profile LOGS in different threads (not reports, but logs of every call that happened), spit out the approximate TIME each one of those events occurred, this gives the human reader a conceptual way to connect the different logs in time- Right now I am using hours, mins, seconds for this, getting to the internal time is one way , the other is to make a redundant call to QueryPerformanceCounter() or what have you. This probably gets into the deeper question of "are these classes supposed to have roles that extend a bit beyond just holding time duration?" If nothing else, I ask that making the interface amongst the timers be the same (same ctor style and the typedef so I can write code against either) > > > IMHO, based on the example you gave, you're mixing two separate > problems: how to capture a representation of current time, and how to > present an interface to capture durations of time. I haven't really > examined the Profiler mentioned lately in detail, so maybe you've > actually already dealt with this in the real code. If so, I'd like to > take a look, as I'm working through similar issues myself. If not, I'm > working on something that be useful to you. [Brian Braatz Writes:] Yes, I am mixing many problems. I am building something on top of Profiler (by Chris Diggings) to also do log tracing, and do it multi-threaded- So now I can see the normal profile report, AND I can also turn on DEEP TRACING which will tell me all the calls that occurred and how long they took. (the sample below doesn't show it, but I have need of getting the internal time data and using it to get a sense of "roughly" when 2 threads of execution are near-about each other- it can be a little off and that is fine) Here is some samples of what I have working: (EVENT_BEGIN and EVEN_END define the profiler objects which use RAII to engage and disengage the profile point) (sample code to test the profiler \ logger) class Fname { public: void SetText() { EVENT_BEGIN(Fname,SetText); Sleep(300); EVENT_END(Fname,SetText); } }; class EntryScreen { Fname m_FName; public: void DoSomethingElse() { EVENT_BEGIN(EntryScreen,DoSomethingElse); PROFILE_CHECKPOINT(DataBaseOperation); Sleep(1234); EVENT_END(EntryScreen,DoSomethingElse); } void DoOtherStuff() { EVENT_BEGIN(EntryScreen,DoOtherStuff); Sleep(1432); m_FName.SetText(); EVENT_END(EntryScreen,DoOtherStuff); } }; class MainWindow { EntryScreen r; public: void DoSomething() { EVENT_BEGIN(MainWindow,DoSomething); { r.DoSomethingElse(); r.DoOtherStuff(); } EVENT_END(MainWindow,DoSomething); } }; Test() { MainWindow in; In.DoSomething(); } Here is the profile REPORT: (this is what the Profiler that Mr Diggins started produces) profile total count mean percent CP-DataBaseOperation 1.230334 1 1.230334 16.392611 Fname#SetText 0.312570 1 0.312570 4.164595 MainWindow#DoSomething 2.981596 1 2.981596 39.725903 EntryScreen#DoOtherStuff 1.750382 1 1.750382 23.321574 EntryScreen#DoSomethingElse 1.230537 1 1.230537 16.395316 total entries 5 total time elapsed 7.505420 overall average 1.501084 NOW- here is the LOG DEPTH DATE TIME NAME ELAPSED 1 3/4/2005 17:06:02 MainWindow#DoSomething 2.98135 2 3/4/2005 17:06:02 EntryScreen#DoSomethingElse 1.23054 2 3/4/2005 17:06:03 EntryScreen#DoOtherStuff 1.75038 3 3/4/2005 17:06:05 Fname#SetText 0.312562 NOTE THE DEPTH COL- by reading this I can tell that: MainWindow#DoSomething ran for about 3 seconds total it called doSomethingElse- which ran for 1.2 seconds then DoSomething called DoOtherStuff() which then called SetText (the depth col makes it a tree) LONG TERM GOALS FOR ME: 1- Get this finished in my production app and working to solve some real problems 2- Merge the logging stuff with the profiler library 3- finish the process of getting this ready for boost EXTREMELY LONG TERM GOALS for the profiling library: * Use wave to parse the boost source code- and make a copy of all the code and insert the profling code INTO the boost libraries Then run the unit tests on the mangled code- spitting out performance info * integrate this with unit testing so that boost libraries can now be tested with integrated profiling Would like to see how the different libraries perform on different platforms with different compilers Would like boost to have yet something else the other libraries of the world do not (I love boost and want to help move it along in any way I can figure out) > > Here's some food for thought: > > * interface issues for capturing durations > o consistent, portable representation > o normalized conversion(s) for use in external expressions > (i.e., as double representing seconds) > o support for internal expressions (add, subtract, compare) > o variety of use cases for establishing boundary moments [Brian Braatz Writes:] (snip) I have read this mail several times and have saved it for reference, I am not a timer expert and VERY MUCH appreciate the information THANK YOU. (and yes it sounds like this work would make what I am working on better) > > Hopefully this gives a taste of the complexities surrounding the > seemingly simple task of getting a precise representation of "now". It > can be a very dangerous area to explore for anyone with perfectionistic > tendencies ;) . IMHO this is a classic "can't see the forest for the [Brian Braatz Writes:] Yes, I will be running into more of these as I move forward, I am in the basic stages right now. Fundamentally, I have an app that has some weird performance issues, and I am working on "baking in" logging and performance analysis to help debug these production issues. So my needs are *very much* from the front lines :) > trees" issue (and I've gotten lost in that forest a few times over the > years...). With the myriad possibilities for differing results driven > by the matrix of potential variation, trying to predict just how a > given combination will behave becomes an exasperating challenge. How > can we get past that? Stop trying to predict the results. Go produce > the results instead. Line up all the possible combinations that can > work on a given platform, turn them loose and take notes. Pinning exact > timing on individual moments may always involve a little uncertainty, > but analyzing average trends can lead to deeper insights and justifiable > confidence in the system overall. Some of the issues with > QueryPerformanceCounter(...) may certainly be "real", yet their impact > on the real world of your applications may prove irrelevant with a > little testing. > [Brian Braatz Writes:] I agree :) For the most part- I am LOOKING for things like this- (example) today the application took 30 seconds to perform an operation that should take 10 seconds. So the issues with realtime ARE important for me from a boost sense, but are livable for the production problem I am working on. > > > >MY REQUESTS:... > > > >There you go, those are my requests. Now I will sit here quietly and > >hope there is a Santa Claus.... > > > >(grin) > > > > > So was this less, or more, than you asked for? Although I suppose you'd > rather have it done than have it described. :) Alas, for that you'll > have to be patient, but perhaps not for long. Since I'm in the process > of writing documentation which needed to address high resolution timing > anyway, organizing my thoughts in this response probably helped me more > than it will help you! At least, until the whole package is ready to go > under the tree... > > - james [Brian Braatz Writes:] It was WAY more than I asked for, and thank you for the brain dump and stimulating discussion. :)

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RE: [boost] Re: high_resolution_timer \ timer feature requestsfor Boost.Timer
by Brian Braatz 05 Mar '05

05 Mar '05

I am generally doing the following- Solving my specific problem for my specific application. After I am through with that issue, I will look more at the general issues (as I ended up inheriting the profiler). For my APP- I am logging in hierarchical form the timings-(in addition to the report the profiler already does) so if you have (code is high level and pseudo) FuncB() { PROFILE POINT FUNCTION B { Sleep(1000); // 1 second } } FuncA() { PROFILE POINT FUNCTION B { Sleep(1000); // 1 second FuncB(); } } Then you will have in the profile Report (overall): FuncA took 2 seconds FuncB took 1 second But the Profile LOG (like a trace of what happened) looks like this DEPTH NAME TIME 0 FuncA 2 Seconds 1 FuncB 1 Second Does that answer your question, or am I missing something? > -----Original Message----- > From: boost-bounces(a)lists.boost.org [mailto:boost-bounces@lists.boost.org] > On Behalf Of Goran Mitrovic > Sent: Friday, March 04, 2005 12:21 AM > To: boost(a)lists.boost.org > Subject: [boost] Re: high_resolution_timer \ timer feature requestsfor > Boost.Timer > > How do you intent to deal with nested timers (outer ones might become very > inaccurate because of the inner ones)? > > Also, how do you plan to represent results of such profiling? > > > _______________________________________________ > Unsubscribe & other changes: > http://lists.boost.org/mailman/listinfo.cgi/boost

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Re: Adobe Open Source Library
by Sean Parent 05 Mar '05

05 Mar '05

> > Adobe has apparently open sourced some libraries- I (very brief) quick > look shows me: If you read my foreword <http://opensource.adobe.com/asl_foreword.html> you will see I give a great deal of credit to Boost and the libraries do depend on Boost. Although I'm not active on this list (too much traffic for me to track) - I do know many people here and have folks like Mat forward me information of interest. As for the question about the relationship of this work to Mat - ASL is the work of Adobe's Software Technology Lab - the team Mat is on, although Mat isn't working directly on these libraries at the moment - he and Alex Stepanov (another STLab member) are working hard on another project. Certainly they influence mine and Foster's work a great deal. I'd be happy to answer technical questions - either directly or though the ASL forum on SourceForge. Sean

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[Boost-bugs] [ boost-Support Requests-1156957 ] Regex
by SourceForge.net 04 Mar '05

04 Mar '05

Support Requests item #1156957, was opened at 2005-03-04 13:19 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=207586&aid=1156957&group_… Category: None Group: None Status: Open Resolution: None Priority: 5 Submitted By: Nobody/Anonymous (nobody) Assigned to: Nobody/Anonymous (nobody) Summary: Regex Initial Comment: PROBLEM: ======== If I use the following code: lv_rcode = regcomp(&lr_re, ms_RegExp, REG_EXTENDED); lv_rcode = regexec(&lr_re, &lv_string[0], 1, &pm, 0); to find the following text: cm582172 Using the following regular expression [A-Z]{2}[[:space:]]*[0-9]{6}[[:space:]]* The text if found. However if I use instead the following code boost::regex regx(config.vRegx.at(iCnt).c_str()); flags = boost::match_default; boost::regex_search(start, end, what, regx, flags) With the same regular expression it does not find the string unless I use the following regular expression: [a-z]{2}[[:space:]]*[0-9]{6}[[:space:]]* The difference is the lower case of the alpha range [a-z] My question: Is there a way I can use regexec to be case sensitive for the alpha range like it is with regex_search function? Thanks, Matias ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=207586&aid=1156957&group_… ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ Boost-bugs mailing list Boost-bugs(a)lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/boost-bugs

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Re: [boost] Re: [congif] BOOST_BEFRIEND_TEMPLATE, BOOST_PRIVATE
by Iain Hanson 04 Mar '05

04 Mar '05

On Fri, 2005-03-04 at 10:56 -0700, Jonathan Turkanis wrote: > Iain Hanson wrote: > On Thu, 2005-03-03 at 23:21 +0100, JOAQUIN LOPEZ MU?Z wrote: > > > > > personally, I don't like obfuscated code. > > And you think I do? Obviously I wouldn't suggest the macros if I though it made > code harder to understand. > Sorry, I could have phrased that better. I'm afraid I let my strong dislike of macros shoow a little to much. /ikh

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Re: [boost] [congif] BOOST_BEFRIEND_TEMPLATE, BOOST_PRIVATE
by Iain Hanson 04 Mar '05

04 Mar '05

On Thu, 2005-03-03 at 23:21 +0100, JOAQUIN LOPEZ MU?Z wrote: > > ----- Mensaje original ----- > De: Jonathan Turkanis <technews(a)kangaroologic.com> > Fecha: Jueves, Marzo 3, 2005 9:49 pm > Asunto: [boost] [congif] BOOST_BEFRIEND_TEMPLATE, BOOST_PRIVATE > > > > > #ifndef BOOST_NO_MEMBER_TEMPLATE_FRIENDS > > > > private: > > > > template<class Y> friend class shared_ptr; > > template<class Y> friend class weak_ptr; These 4 line of code I can read and understand. > > > > > > BOOST_PRIVATE: > > BOOST_BEFRIEND_TEMPLATE(shared_ptr, Y, 1) > > BOOST_BEFRIEND_TEMPLATE(weak_ptr, Y, 1) > > And these 2 lines don't mean anything I can grok. personally, I don't like obfuscated code. /ikh

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RE: [boost] Re: Re: Boost.org Site Suggeswtion was [RE: Re:AdobeOpenSourceLibrary]
by Brian Braatz 04 Mar '05

04 Mar '05

Please keep going with this. I think such a page would help a lot with people "selling" the idea of using boost in their enterprise. For the ACE sample for example, it really provides people the ammunition to use ACE in their company. I use boost in my company and sometimes get weird looks from people when you say "open source" - they think in the back of their heads this is some weird hacky thing dreamed up by a 14 year old and does not have commercial value. (though it helps being the Chief Software Architect- I still get weirdness from non-developers) A list of projects which successfully uses boost would help considerably in dealing with the "pencil heads" of the world :) > -----Original Message----- > From: boost-bounces(a)lists.boost.org [mailto:boost-bounces@lists.boost.org] > On Behalf Of Jeff Garland > Sent: Friday, March 04, 2005 3:41 AM > To: boost(a)lists.boost.org > Subject: Re: [boost] Re: Re: Boost.org Site Suggeswtion was [RE: > Re:AdobeOpenSourceLibrary] > > On Thu, 3 Mar 2005 12:25:30 -0800, Robert Ramey wrote > > There are a couple of reasons a wiki page might not be the best choice. > > > > a) too easily hackable > > b) I very much like the idea of getting some rough statistics. e.g. > > how many people use library x. This presume data with some sort of > simple > > structure. > > Here's a couple thoughts. First off, the need for this was brought up at > OOPSLA. People really like to see a list of users when evaluating if they > are > going to use a new open source tool. This is a very common feature of > open > source projects. So I think we really need to find a way to do this. As an > example: > > http://www.cs.wustl.edu/~schmidt/ACE-users.html > > As for how to gather the information, I think there needs to be 2 phases. > Phase 1 would be a 'logo like' campaign to gather up current users. We > can > use the wiki/mail list and whatever tools we have available to gather the > information. Publish a request on comp.lang.c++, etc. From this, I'll > volunteer to collate the list and create a fixed web page we can > incorporate > into the main Boost web site. > > Phase 2 would be to come up with a way to maintain this. We could use a > wiki > page or perhaps a small web form to gather up information. This might be > a > simple php script that takes the information and updates the wiki or sends > me > email to add the information to the site. Periodically we would gather > these > up and add them in. > > Actually now that I've written it, it seems like designing the form should > be > the first step... > > Jeff > > > _______________________________________________ > Unsubscribe & other changes: > http://lists.boost.org/mailman/listinfo.cgi/boost

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best way to make {reverse_}fold a sequence
by Larry Evans 04 Mar '05

04 Mar '05

After creating: typedef range_c<int,0,3> types; typedef fold < types , empty_base , inherit< arg<2>, arg<1> > >::type tuple_type; I'd like to use for_each on tuple_type. For example: struct print_integral_c { template<int i, typename Right> void operator()(inherit<integral_c<int,i>, Right>)const { std::cout<<i<<"\n"; } }; for_each<tuple_type>(print_integral_c); However, tuple_type is not a sequence; hence, for_each won't work. I could define the necessary specializations for mpl::begin, etc., to make it a sequence, but I was wondering if there's any way or any plans to somehow automagically make fold or reverse_fold into a sequence so I could use for_each on it.

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RE: [boost] Re: Boost.org Site Suggeswtion was [RE: Re: Adobe OpenSourceLibrary]
by Brian Braatz 04 Mar '05

04 Mar '05

> -----Original Message----- > On Behalf Of Thomas Matelich > OpenSourceLibrary] > > Sounds like a wiki page to me. > > > On Thu, 3 Mar 2005 08:29:17 -0800, Robert Ramey <ramey(a)rrsd.com> wrote: > > I would like to see this idea taken a little bit further. > > > > I would like a place where users of boost can add a line describing: > > > > name > > organization > > application > > which libraries they use > > general comments. > > > > This would be very helpful feedback as to what is getting used by whom > for > > what purpose. It would be useful to library authors to get a sense of > what > > is being used. It would be very useful to people who are considering > > downloading boost and want to know what parts have been found useful to > > other people. > > > > Think of it as "boost" marketing. > > > > Robert Ramey > > [Brian Braatz Writes:] I propose if it becomes a wiki- that there is a LINK to it on the MAIN page

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[Threads] error notification (joining an already exited thread in Windows debug builds)
by Kevin Wheatley 04 Mar '05

04 Mar '05

Hi, using a thread_group, I have an application that runs something like this: thread_group myThreads; for each thread we need myThreads.create_thread(reference to thread function) for each work item { add work item to queue // threads just created start doing the work... } add 'finish' task to queue myThreads.join_all() delete threads... etc etc When running under windows debug build I noticed that the join on the individual threads in the group can fail the assertion: assert(res == WAIT_OBJECT_0); But rather unhelpfully it doesn't include the error code returned by the call or GetLastError() as to why ! In my case I belive this is because the thread has already exited before joining or something similar. now the question would be of course what to do if an error occurs during a non-debug build as the assert will not be there most likely and I'd never notice any problems as the reult is discarded. Thread join could return something rather then being void, that the thread group could then pass back, but then what if the failure occurs half way through the thread group? Should it return a list of error indicators? e.g. thread is not joinable, thread id is invalid, deadlock detected (POSIX optional), or should this be a 'checked_join_all()' (join_all_checked() ?) Is there any work going on that might addrss these concerns? (I checked the CVS branches but didn't find anything obvious) Thanks Kevin -- | Kevin Wheatley, Cinesite (Europe) Ltd | Nobody thinks this | | Senior Technology | My employer for certain | | And Network Systems Architect | Not even myself |

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