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Each instance of Charon-PAR must be started in a separate directory because certain files (SSTORAGE.DAT, NVOLATILE.DAT, UA_SSTORAGE.DAT, and console.dat) will always be created in the current working directory of the emulator instance. Starting multiple emulator instances in the same directory will lead to errors due to file locking problems.
If Charon-PAR is to be started by a non-root user (introduced in version 3.0.5 build 21906), certain capabilities must be set for the Charon-PAR image, for example via the following command:
sudo setcap 'cap_sys_nice+eip cap_ipc_lock+eip cap_net_admin+eip' /opt/charon/bin/charon-par

When starting Charon-PAR (the command /opt/charon/bin/charon-par), there are several command-line options that can be used:

OptionOptions (1)	Description
`-D`, `--dump`	Do not use in a production environment unless instructed to do so by Stromasys technical support! Emulator runs in core dump mode. If stopped with SIGQUIT or other stop signal, it will write a core file in the location specified by /proc/sys/kernel/core_pattern.
`-F`, `--fast-fpu`	Fast FPU mode provides better floating-point performance at the expense of minor deviation in floating-point status reporting. When this option is enabled, all floating-point operations produce exactly the same values as the real hardware. The differences cause FPU tests (ODE WDIAG and llmc_em) to report errors. However, it is highly unlikely that any real system or application software is impacted by this deviation. Configuration show in emulator log as (FPU DIT Mode: Fast - vs Precise).
`-G <mode>` `--ditgcsync <mode>`	Do not use in a production environment unless instructed to do so by Stromasys technical support! Possible values: sync: synchronous garbage collector mode async: asynchronous garbage collector mode (default)
`-S <mode>` `--ditsync <mode>`	Do not use in a production environment unless instructed to do so by Stromasys technical support! Possible values: sync: synchronous DIT execution mode async: asynchronous DIT execution mode (default) no_dit: DIT disabled
`-K <dit-level>--dit-kind <dit-level>`	Do not use in a production environment unless instructed to do so by Stromasys technical support! Each Charon-PAR model has a built-in maximal DIT optimization level. This parameter allows to reduce this level. As result, the emulation will run with reduced performance. Possible values (from lowest to highest): dispatch, slow, medium, basic, adv
`-X <mode>` `--collect-statistics <mode>`	Collect the available statistics. Mode format: `<level>,json,<file<output-name>descriptor>`, where level = 0-9 The output-descriptor can be one of the following: A filename A named pipe (e.g., created with the mkfifo command); added in 3.0.5-21904 A Unix socket in the format unix://<socket-name>; added in 3.0.5-21904
`-a` <name> `--instance-name` <name>	Assigns a logical name to the emulated system instance at start . This parameter will only be used in future Baremetal environments. (reserved for future use).
`-c` <console-port> `--console-port` <console-port>	Redirects the Charon-PAR console to a TCP/IP port that can be accessed via telnet (from local system only). This makes the console accessible also when the emulator runs in daemon mode. The port number can be in the range of 0-65535. However, port numbers 0-1023 are generally reserved for specific applications and should not be used.
`-f` `<filename>``--config` `<filename>`	Specifies the path to the emulator configuration file.
`-h--help`	Displays a short help information.
`-l` <logpath> `--logfile-path` <logpath>	Specifies the path to the logfile.
`-p <filename>` `--pidfile <filename>`	Name of file File to store the process ID of the emulator process. Used mostly when running emulator as a daemon.
`-x` `--daemon`	The emulator is started as a daemon. This mode can be used when the emulator is to be started at system boot. It can also be used to start the emulator while connected to the system via the network to avoid license problems.
`--mmu-assist <setting>`	Do not use unless advised to do so by Stromasys technical support! MMU assist type. Possible values: none, simple, advanced. Used in debugging situations to modify Charon optimization modes.
`--no-libc-assist`	Do not use unless advised to do so by Stromasys technical support! Disable libc assist mode. Used in debugging situations.
Added in 3.0.5 build 21904 (do not use unless advised to do so by Stromasys support):
`--dit_page_headers <number>`	DIT code headers number (default 0 - automatic)
`--dit_page_size <number>`	DIT code page size KB (default 48). The parameter defines the size of a single translated page chunk size.
`--dit_pool_size <number>`	DIT pool size GB (default 2; maximum value 128). Any increase will increase the emulator's memory requirements accordingly.

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