[Bug 660170] New: Excessive CPU Usage When Using `alsasrc ! audiorate'

GStreamer (bugzilla.gnome.org) bugzilla at gnome.org
Mon Sep 26 12:51:22 PDT 2011

  GStreamer | gst-plugins-base | git

           Summary: Excessive CPU Usage When Using `alsasrc ! audiorate'
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: critical
          Priority: Normal
         Component: gst-plugins-base
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: bgmarete at gmail.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

Using audiorate to smooth out the stream produced by alsasrc causes excessive
CPU usage. On my machine, a Core i5 that has 2 cores and 4 hyperthreads, it
uses more than 1 hyperthread.

This pipeline trivially reproduces the problem:

gst-launch alsasrc  ! audiorate ! wavenc ! filesink location=/dev/null

Redirecting the filesink location to an actual file shows that audiorate is
producing an excessive number of samples (many thousands a second -- see the
attached log also) and will produce a multi-gigabyte file within a minuite.

Attached is a debug log generating by setting alsasrc and audiorate to debug
logging levels.

Configure bugmail: https://bugzilla.gnome.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the QA contact for the bug.
You are the assignee for the bug.

More information about the gstreamer-bugs mailing list