Created attachment 64743 [details] testpage The attached testpage takes over one minute of CPU-time before it is rendered to the screen when I open it with Okular.
# ======== # captured on: Thu Jul 26 17:07:51 2012 # hostname : x4 # os release : 3.5.0-04773-gbdc0077-dirty # perf version : 3.5.rc6.40.g055c9f.dirty # arch : x86_64 # nrcpus online : 4 # nrcpus avail : 4 # cpudesc : AMD Phenom(tm) II X4 955 Processor # cpuid : AuthenticAMD,16,4,2 # total memory : 8169156 kB # cmdline : /usr/src/linux/tools/perf/perf record okular testpage.pdf # event : name = cycles, type = 0, config = 0x0, config1 = 0x0, config2 = 0x0, excl_usr = 0, excl_kern = 0, id = { 65, 66, 67, 68 } # HEADER_CPU_TOPOLOGY info available, use -I to display # ======== # # Samples: 248K of event 'cycles' # Event count (approx.): 199556998272 # # Overhead Command Shared Object Symbol 35.90% okular libm-2.16.so [.] feraiseexcept 12.30% okular libm-2.16.so [.] __sin 9.03% okular libm-2.16.so [.] __cos 5.01% okular libpoppler.so.26.0.0 [.] void std::__introsort_loop<SplashIntersect*, long, cmpIntersectFunctor>(SplashIntersect*, SplashInt ersect*, long, cmpIntersectFunctor) 2.80% okular libpoppler.so.26.0.0 [.] SplashXPathScanner::computeIntersections() 2.62% okular libc-2.16.so [.] _int_malloc 2.57% okular libm-2.16.so [.] __dubsin 2.29% okular libpoppler.so.26.0.0 [.] SplashXPathScanner::addIntersection(double, double, unsigned int, int, int, int) 2.14% okular libpoppler.so.26.0.0 [.] void std::__unguarded_linear_insert<SplashIntersect*, cmpIntersectFunctor>(SplashIntersect*, cmpInt ersectFunctor) 1.41% okular libpoppler.so.26.0.0 [.] Lexer::getObj(Object*, int) 1.35% okular libpoppler.so.26.0.0 [.] Gfx::doRadialShFill(GfxRadialShading*) 1.35% okular libc-2.16.so [.] _int_free 1.11% okular libpoppler.so.26.0.0 [.] void std::__adjust_heap<SplashIntersect*, long, SplashIntersect, cmpIntersectFunctor>(SplashInterse ct*, long, long, SplashIntersect, cmpIntersectFunctor) 1.09% okular libpoppler.so.26.0.0 [.] Lexer::getChar(bool) 0.90% okular libpoppler.so.26.0.0 [.] GfxSubpath::lineTo(double, double) 0.88% okular libm-2.16.so [.] __sincos 0.82% okular libz.so.1.2.7 [.] inflate
It looks like a bug in glibc-2.16. Before commit b35fe25ed (of glibc) it takes 24 seconds: # Overhead Command Shared Object Symbol 24.09% okular libm.so [.] __sincos 10.42% okular libpoppler.so.26.0.0 [.] SplashIntersect* std::__unguarded_partition<SplashIntersect*, SplashIntersect, cmpIntersectFunc tor>(SplashIntersect*, SplashIntersect*, SplashIntersect const&, cmpIntersectFunctor) 5.73% okular libpoppler.so.26.0.0 [.] SplashXPathScanner::computeIntersections() 5.13% okular libpoppler.so.26.0.0 [.] void std::__unguarded_linear_insert<SplashIntersect*, cmpIntersectFunctor>(SplashIntersect*, cmpIntersectFunctor) 4.87% okular libpoppler.so.26.0.0 [.] SplashXPathScanner::addIntersection(double, double, unsigned int, int, int, int) 4.39% okular libc-2.16.90.so [.] _int_malloc 3.65% okular libpoppler.so.26.0.0 [.] void std::__adjust_heap<SplashIntersect*, long, SplashIntersect, cmpIntersectFunctor>(SplashInt ersect*, long, long, SplashIntersect, cmpIntersectFunctor)
Takes 16 seconds here, not over a minute, anyway, it is a comple file and thus it takes time to render, of course it can be probably improved, but we have much other things to do other than optimizing for complex files like these. BTW you should open a bug against the glibc devels if they have such a massive regression in performance.
(In reply to comment #3) > Takes 16 seconds here, not over a minute, anyway, it is a comple file and thus > it takes time to render, of course it can be probably improved, but we have > much other things to do other than optimizing for complex files like these. One way of improving the issue would be to display text first and render complex graphics in the background (like Acrobat Reader). > BTW you should open a bug against the glibc devels if they have such a massive > regression in performance. I already did that see URL in the summary: http://sourceware.org/bugzilla/show_bug.cgi?id=14412
Moved to glibc.
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