LATENCYTOP(8)						      System Manager's Manual						     LATENCYTOP(8)

NAME

       latencytop - a tool for developers to visualize system latencies

SYNOPSIS

       latencytop [--unknown] [processes...]

DESCRIPTION

       This manual page documents briefly the latencytop command.

       latencytop  is  a Linux* tool for software developers (both kernel and userspace), aimed at identifying where in the system latency is hap-
       pening, and what kind of operation/action is causing the latency to happen so that the code can be changed to avoid the worst latency  hic-
       cups.

       LatencyTOP  focuses on the cases where the applications want to run and execute useful code, but there's some resource that's not currently
       available (and the kernel then blocks the process). This is done both on a system level and on a per process level, so  that  you  can  see
       what's happening to the system, and which process is suffering and/or causing the delays.

       You  can  walk  the  processes by using the cursor keys. If you press s followed by a letter, then only active processes starting with that
       lettter are displayed and walked. If you press s followed by 0 then that filter is reset.

       If you press f then LatencyTop displays a list of all processes currently waiting for an fsync to finish. Pressing f again returns  you	to
       the normal operating mode of LatencyTop.

SEE ALSO

       powertop(1)
       The program is more fully described at http://www.latencytop.org

AUTHOR

       latencytop was written by Arjan van de Ven <arjan@linux.intel.com>.

       This manual page was written by Giacomo Catenazzi <cate@debian.org>, for the Debian project (but may be used by others).

								 November 9, 2008						     LATENCYTOP(8)