https://chenfu.ai/en/tags/audio/ Recent content in Audio on Fran Kuo | R&D Leadership Hugo -- 0.157.0 en Fri, 08 Feb 2013 00:00:00 +0000 https://chenfu.ai/en/posts/i2s-bus-channels-setting-in-gstreamer/ Fri, 08 Feb 2013 00:00:00 +0000 https://chenfu.ai/en/posts/i2s-bus-channels-setting-in-gstreamer/ <p>A colleague recently observed a significant discrepancy in CPU usage while testing the GStreamer <code>alsasrc</code> and <code>osssrc</code> plugins. On our hardware platforms, <code>alsasrc</code> was consuming about 16% of CPU resources, whereas the vendor-provided test tools achieved the same task with only 1~2% overhead. This massive gap in efficiency piqued my curiosity, and I decided to investigate the root cause.</p> <p>After several hours of deep diving into the code, I discovered that when the plugin is set to &ldquo;non-blocking mode,&rdquo; it can trigger a busy-wait condition within a <code>while</code> loop, needlessly spiking CPU cycles. After a quick patch to optimize this behavior, I managed to bring the CPU usage down to 12%. While an improvement, it still felt far from the vendor tool&rsquo;s efficiency.</p>