dmd -profile=gc
Just merged in is a new compiler switch that instruments generated code to collect statistics on memory allocation usage and generates a report upon program termination. (Much like how -profile works.) This was based on a prototype Andrei had written earlier. Andrei and I suspect it can be of great use in figuring out why a program may be excessively slow or consume excessive memory. I encourage giving it a try on some non-trivial project, and see if it gives useful information.
Re: dmd -profile=gc
On Sunday, 3 May 2015 at 21:11:58 UTC, Walter Bright wrote: Just merged in is a new compiler switch that instruments generated code to collect statistics on memory allocation usage and generates a report upon program termination. (Much like how -profile works.) This was based on a prototype Andrei had written earlier. Andrei and I suspect it can be of great use in figuring out why a program may be excessively slow or consume excessive memory. I encourage giving it a try on some non-trivial project, and see if it gives useful information. Nice! I bet this can be used to improve Phobos in tandem with @nogc.
Re: dmd -profile=gc
Can be -profile and -profile=gc mixed together? On Sunday, 3 May 2015 at 21:11:58 UTC, Walter Bright wrote: Just merged in is a new compiler switch that instruments generated code to collect statistics on memory allocation usage and generates a report upon program termination. (Much like how -profile works.) This was based on a prototype Andrei had written earlier. Andrei and I suspect it can be of great use in figuring out why a program may be excessively slow or consume excessive memory. I encourage giving it a try on some non-trivial project, and see if it gives useful information.
Re: dmd -profile=gc
On 5/4/2015 6:06 AM, Andrea Fontana wrote: Can be -profile and -profile=gc mixed together? Yes, and you'll get two reports.
Re: dmd -profile=gc
On Monday, 4 May 2015 at 19:24:57 UTC, Walter Bright wrote: On 5/4/2015 6:06 AM, Andrea Fontana wrote: Can be -profile and -profile=gc mixed together? Yes, and you'll get two reports. Does it work with a multithreaded application (in contrast to -profile) ?
Re: dmd -profile=gc
On Monday, 4 May 2015 at 19:24:57 UTC, Walter Bright wrote: On 5/4/2015 6:06 AM, Andrea Fontana wrote: Can be -profile and -profile=gc mixed together? Yes, and you'll get two reports. So I think they should be called -profile and -profile-gc. Or at least -profile=code -profile=gc (but i guess there's a problem with retro-compatibility) Andrea
Re: dmd -profile=gc
On 5/4/2015 10:53 PM, extrawurst wrote: Does it work with a multithreaded application (in contrast to -profile) ? Yes, and -profile was also fixed a week ago to handle multiple threads.
Re: dmd -profile=gc
I have a problem with regexes inside my project. 5376580784 [] std.regex.internal.kickstart.Kickstart!char.ShiftOr.this dmd\windows\bin\..\..\src\phobos\std\regex\internal\kickstart.d:284 Calling of regex's crot with any argument causes that. Problem only exists if my project is compiled without -debug flag. If i try dustmite it then problem dissapears. I don't know how i can help to developers but maybe one could investigate. As a workaround i'm using ctRegex.
Re: dmd -profile=gc
*ctor *and then appication terminates with OOM exeption
Re: dmd -profile=gc
On Tuesday, 5 May 2015 at 09:30:55 UTC, Walter Bright wrote: On 5/4/2015 10:53 PM, extrawurst wrote: Does it work with a multithreaded application (in contrast to -profile) ? Yes, and -profile was also fixed a week ago to handle multiple threads. Awesome! Looking forward for the next release!!
Re: dmd -profile=gc
On Tuesday, 5 May 2015 at 13:55:29 UTC, Temtaime wrote: I have a problem with regexes inside my project. 5376580784 [] std.regex.internal.kickstart.Kickstart!char.ShiftOr.this dmd\windows\bin\..\..\src\phobos\std\regex\internal\kickstart.d:284 Calling of regex's crot with any argument causes that. Problem only exists if my project is compiled without -debug flag. If i try dustmite it then problem dissapears. What do you mean? You need to formulate the test command correctly.
Re: dmd -profile=gc
On Tuesday, 5 May 2015 at 09:30:55 UTC, Walter Bright wrote: On 5/4/2015 10:53 PM, extrawurst wrote: Does it work with a multithreaded application (in contrast to -profile) ? Yes, and -profile was also fixed a week ago to handle multiple threads. Finally! Yah! /P
Re: dmd -profile=gc
On 5/5/2015 1:40 PM, Paolo Invernizzi wrote: On Tuesday, 5 May 2015 at 09:30:55 UTC, Walter Bright wrote: On 5/4/2015 10:53 PM, extrawurst wrote: Does it work with a multithreaded application (in contrast to -profile) ? Yes, and -profile was also fixed a week ago to handle multiple threads. Finally! Yah! Ironically, the fix turned out to be easy. The idea came from Andrei.
Re: dmd -profile=gc
On Tuesday, 5 May 2015 at 23:36:41 UTC, Walter Bright wrote: On 5/5/2015 1:40 PM, Paolo Invernizzi wrote: On Tuesday, 5 May 2015 at 09:30:55 UTC, Walter Bright wrote: On 5/4/2015 10:53 PM, extrawurst wrote: Does it work with a multithreaded application (in contrast to -profile) ? Yes, and -profile was also fixed a week ago to handle multiple threads. Finally! Yah! Ironically, the fix turned out to be easy. The idea came from Andrei. Out of curiousity can you link the Change that fixes that ?
Re: dmd -profile=gc
On 5/6/15 1:11 AM, extrawurst wrote: On Tuesday, 5 May 2015 at 23:36:41 UTC, Walter Bright wrote: On 5/5/2015 1:40 PM, Paolo Invernizzi wrote: On Tuesday, 5 May 2015 at 09:30:55 UTC, Walter Bright wrote: On 5/4/2015 10:53 PM, extrawurst wrote: Does it work with a multithreaded application (in contrast to -profile) ? Yes, and -profile was also fixed a week ago to handle multiple threads. Finally! Yah! Ironically, the fix turned out to be easy. The idea came from Andrei. Out of curiousity can you link the Change that fixes that ? https://github.com/D-Programming-Language/druntime/pull/1233 Andrei
Re: dmd -profile=gc
On Wednesday, 6 May 2015 at 08:16:31 UTC, Andrei Alexandrescu wrote: On 5/6/15 1:11 AM, extrawurst wrote: On Tuesday, 5 May 2015 at 23:36:41 UTC, Walter Bright wrote: On 5/5/2015 1:40 PM, Paolo Invernizzi wrote: On Tuesday, 5 May 2015 at 09:30:55 UTC, Walter Bright wrote: On 5/4/2015 10:53 PM, extrawurst wrote: Does it work with a multithreaded application (in contrast to -profile) ? Yes, and -profile was also fixed a week ago to handle multiple threads. Finally! Yah! Ironically, the fix turned out to be easy. The idea came from Andrei. Out of curiousity can you link the Change that fixes that ? https://github.com/D-Programming-Language/druntime/pull/1233 Andrei Ah thanks, I was looking for it in the wrong Project -.-
Re: dmd -profile=gc
On Sunday, 3 May 2015 at 21:11:58 UTC, Walter Bright wrote: Just merged in is a new compiler switch that instruments generated code to collect statistics on memory allocation usage and generates a report upon program termination. (Much like how -profile works.) This was based on a prototype Andrei had written earlier. Andrei and I suspect it can be of great use in figuring out why a program may be excessively slow or consume excessive memory. I encourage giving it a try on some non-trivial project, and see if it gives useful information. For now -profile=gc seems to count only the number of bytes allocated, can we also have the number of how many times the allocator is called? That's also pretty useful.
Re: dmd -profile=gc
On Sunday, 3 May 2015 at 21:11:58 UTC, Walter Bright wrote: Just merged in is a new compiler switch that instruments generated code to collect statistics on memory allocation usage and generates a report upon program termination. (Much like how -profile works.) This was based on a prototype Andrei had written earlier. Andrei and I suspect it can be of great use in figuring out why a program may be excessively slow or consume excessive memory. I encourage giving it a try on some non-trivial project, and see if it gives useful information. I've seen a few tricks that you, Andrei, and others have used for profiling and optimization. This naturally leads to "Is there a solid reference to this material in any shape form that isn't found by searching the forum"? Optimization is an important aspect of coding. Having a collection of web pages, say wiki like, would be useful to many. One of the main reasons I only lurk in D is because I do not currently have faith in being able to write high performance real time applications with it(mainly the GC). Being able to peruse some of the optimization strategies and tips that come up in the forum would be helpful, but not actually do this in the forum. E.g., anyone care to start an "optimization" wiki for D?
