sasutil(1) control program for libsphde project

SYNOPSIS

sasutil [-h] [-v] [-p path] <command> [<args>]

DESCRIPTION

The sasutil utility is used to control de libsphde share memory segments, showing its internal details (memory state/dump, lock/semaphores details, etc.), memory maps and reseting its internal state.

OPTIONS

-v
    Prints the sasutil version.

-h
    Prints the synopsis and a list of the available commands.

-p
    Path to wherever libsphde segment is located. This also can be
    controlled by setting SASSTOREPATH environment variable. If not path is
    given, will use the current path.

COMMANDS

The available commands are: stat, detail, reset, dump, remove, list, path, and map.

stat
    Shows the overall memory statistics: total in use, total free, total
    uncommited, total region free, total region used, and anchor free space.

detail
    Shows detailed information, dividing each statistic from stat
    command in memory block information.

reset
    Resets the anchor semaphore (used to access the control shared memory
    segment), the allocated segments and all internal locks. This command
    is useful to reset the SPHDE state after an process finished with
    unexpected error (like a SEGFAULT).

dump <address\:size>
    Dumps a list of <memory:size> where <memory> is a memory address in
    hexadecimal and <size> is decimal. The output is similar to
    hexdump utility called with '-C' option.

remove
    Removed the allocated segments, internal locks and anchor semaphores from
    control shared memory segment).

list
    List and dump in use shared memory blocks.

path
    Shows the store path used (as indicated by SASSTOREPATH).

map <pid> 
    Shows the memory map (/proc/<pid>/maps) for PIDs indicates as aguments.
    Default is current process.

ENVIRONMENT VARIABLES

The sasutil command accepts te following environment variables:

SASSTOREPATH
    Defines the path to search for the store segment to attach and analyze.

AUTHOR

Written by Steven Munroe (initial API and implementation) and Adhemerval Zanella (bugfixes and API improvements).

REPORTING BUG

Report a bug to [email protected]

COPYRIGHT

Copyright (c) 2009, 2011 IBM Corporation. All rights reserved. This program and the accompanying materials are made available under the terms of the Eclipse Public License v1.0 which accompanies this distribution, and is available at http://www.eclipse.org/legal/epl-v10.html .