<div dir="ltr">Hi, Thank you very much for your response. I have encountered other problems : 1- I have coupled in the boilerplate/ for my backend ==> but test results are FAIL (out of memory !!!) 2- I have generate a cairo trace for my application (Browser OWB), but when I use the cairo-perf-trace, I have this error : [ # ] backend test min(s) median(s) stddev. count [ 0] sahgfx Error during replay, line 5: invalid value (typically too big) for the size of the input (surface, pattern, etc.) [ 0] image Error during replay, line 5: invalid value (typically too big) for the size of the input (surface, pattern, etc.) there is my app.trace file : %!CairoScript - middleware %*** Warning CairoScript is still a new tracing format, and is subject to change. dict /type /sahgfx set surface dup /s0 exch def <==== the problem is in this line 5 dict /type /sahgfx set surface dup /s1 exch def exch dup /s0 exch def context % c0 exch dup /s1 exch def context % c1 s1 context % c2 s1 context % c3 s1 context % c4 s1 context % c5 s1 context % c6 0 0 1280 720 rectangle Thanks, Best Regards, Aymen CHEHAIDER <div class="gmail_quote">2009/10/13 Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk" target="_blank">chris@chris-wilson.co.uk</a>> <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Excerpts from aymen chehaider's message of Tue Oct 13 12:13:37 +0100 2009: <div>> I have developped a new backend for Cairo 1.9.2. *(Embedded environment)* > > I want to know, how can I test perfs of this new backend ??? > > How can I use cairo-trace and cairo-perf-trace for this backend ? </div>First I presume that you have coupled in the boilerplate/ for your backend and are satisfied with the results from the test suite. <div> > I have tried to use cairo-trace : *cairo-trace --profile my_application* > the result in the file is : *% Unknown object of type cairo_surface_t, trace </div>> is incomplete.* Indeed, it means that util/cairo-trace/trace.c does not have the appropriate hook for backend surface constructor. Simply add the relevant function wrappers by doing a copy'n'paste from one of the other backends. But recording new traces is not strictly relevant for performance testing, since you can just use the existing traces from cairo-traces.git with cairo-perf-trace. The trick here is that cairo-perf-trace uses a default value of FALSE for target_is_measurable(), so you need to add your surface type to that switch. And the same for the micro-benchmark suite, called cairo-perf for 1.9.2. And whilst we're on that subject, beware the interface changes that are in master. Hope this helps, and you have fun with cairo. Please do share any experiences you gained whilst developing a novel backend -- especially if they may help shape the internal interfaces both for easing maintenance and improving performance. -ickle -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ cairo mailing list <a href="mailto:cairo@cairographics.org" target="_blank">cairo@cairographics.org</a> <a href="http://lists.cairographics.org/mailman/listinfo/cairo" target="_blank">http://lists.cairographics.org/mailman/listinfo/cairo</a> </blockquote></div> </div>