<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW --- - library should be thread-safe" href="https://bugs.freedesktop.org/show_bug.cgi?id=50992#c77">Comment # 77</a> on <a class="bz_bug_link bz_status_NEW " title="NEW --- - library should be thread-safe" href="https://bugs.freedesktop.org/show_bug.cgi?id=50992">bug 50992</a> from <a class="email" href="mailto:Thomas.Freitag@alfa.de" title="Thomas Freitag <Thomas.Freitag@alfa.de>"> Thomas Freitag</a> <pre>(In reply to <a href="show_bug.cgi?id=50992#c76">comment #76</a>) > Also there seems to be a huge lock-contention (at leat with your pdftoppm > test), running the patched pdftoppm with USE_THREADS and MAX_THREADS of 8 i > never got cpu usage over 100% (where 100% is one core used) of my 8 cores (i > expected it to go close to 700% at least) and the number of pages per second > also dropped, in a given PDF with lots of pages and 20 seconds of rendering > it went down from around 250 to around 170 pages rendered when using > multithreading. > > Any idea why that might be happening? Probably a problem of using sleep(), which has one second as minimal value when all threads are used. Can You try to increase the MAX_THREADS? I used 5 for my dual core during testing, and it became faster!</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>