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IRIX Base Documentation 1998 November
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IRIX 6.5.2 Base Documentation November 1998.img
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Text File
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1998-10-20
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5KB
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133 lines
SSSSNNNN((((1111)))) SSSSNNNN((((1111))))
NNNNAAAAMMMMEEEE
ssssnnnn - NUMA Memory Management Configuration Tool
SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
sn [----vvvvssssaaaahhhh]
[----bbbb _o_n|_o_f_f]
[----mmmm _o_n|_o_f_f|_f_o_n|_f_o_f_f]
[----tttt _t_h_r_e_s_h_o_l_d]
[----zzzz _d_i_s_t_a_n_c_e]
[----uuuu _o_n|_o_f_f]
[----pppp _t_h_r_e_s_h_o_l_d]
[----wwww _i_n_t_e_r_v_a_l]
[----iiii _o_n|_o_f_f]
[----ffff _f_a_c_t_o_r]
[----rrrr _o_n|_o_f_f|_f_o_n|_f_o_f_f]
[_n_o_d_e-_p_a_t_h]
DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
The current NUMA configuration parameters are set according to
specifications and/or displayed for the given _n_o_d_e-_p_a_t_h or all nodes in
the system.
OOOOPPPPTTTTIIIIOOOONNNNSSSS
----vvvv Show all configuration parameters.
----ssss Silent operation. Just set specified parameters.
----aaaa Apply requested operation to all nodes in the system.
----hhhh Print brief usage summary.
----bbbb _o_n|_o_f_f
Turn BTE (Block Transfer Engine) on/off for dynamic migration.
----mmmm _o_n|_o_f_f|_f_o_n|_f_o_f_f
Set the default dynamic migration mode; _o_n sets the default to
migration enabled and users can override the default on a per
address space basis; _o_f_f sets the default to migration off and users
can override the default on a per address space basis; _f_o_f_f
completely disables migration and _f_o_n forces migration to be
enabled.
----tttt _t_h_r_e_s_h_o_l_d
Set the dynamic migration threshold to _t_h_r_e_s_h_o_l_d. This _t_h_r_e_s_h_o_l_d is
a percentage of the maximum possible difference between a local and
a remote memory reference counter.
PPPPaaaaggggeeee 1111
SSSSNNNN((((1111)))) SSSSNNNN((((1111))))
----zzzz _d_i_s_t_a_n_c_e
Set the cutoff distance for migration to _d_i_s_t_a_n_c_e. This is the
minimum distance between a source and a destination node required
for migration to take place.
----uuuu _o_n|_o_f_f
Turn the memory reference counter unpegger on/off.
----pppp _t_h_r_e_s_h_o_l_d
Set the pegged level to _t_h_r_e_s_h_o_l_d. This _t_h_r_e_s_h_o_l_d is a percentage of
the maximum count a memory reference counter can hold.
----wwww _i_n_t_e_r_v_a_l
Set the unpegger period to _i_n_t_e_r_v_a_l. This _i_n_t_e_r_v_a_l is in seconds and
specifies how often the unpegger should be waken up to check the
memory reference counters in every node, and reset those counters
that have reached a pegged level.
----iiii _o_n|_o_f_f
Enable or disable migration dampening.
----ffff _f_a_c_t_o_r
Set the migration dampening factor. This factor is a percentage of
the maximum possible dampening factor (4 for Origin 2000 systems).
----rrrr _o_n|_o_f_f|_f_o_n|_f_o_f_f
Set the default reference counting mode; _o_n sets the default to
enabled and users can override the default on a per address space
basis; _o_f_f sets the default to disabled and users can override the
default on a per address space basis; _f_o_f_f completely disables
reference counting and _f_o_n forces reference counting to be enabled.
EEEEXXXXAAAAMMMMPPPPLLLLEEEE
To turn migration off for all nodes:
$ sn -a -m off
To turn migration on with a threshold of 34%:
$ sn -a -m on -t 34
To enable the extended reference counters on all nodes:
$ sn -a -r on
RRRREEEESSSSTTTTRRRRIIIICCCCTTTTIIIIOOOONNNNSSSS
Only the superuser or users with the MEMORY_MGT capability are allowed to
use this command to change numa parameters.
SSSSEEEEEEEE AAAALLLLSSSSOOOO
nnnnuuuummmmaaaa(5), rrrreeeeffffccccnnnntttt(5), ggggrrrr____ssssnnnn(1), nnnnssssttttaaaattttssss(1), ggggrrrr____nnnnssssttttaaaattttssss(1).
PPPPaaaaggggeeee 2222