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- ccccaaaacccchhhheeeedddd((((1111MMMM)))) ccccaaaacccchhhheeeedddd((((1111MMMM))))
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- NNNNAAAAMMMMEEEE
- cached - monitor single bit secondary cache errors.
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- SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
- ccccaaaacccchhhheeeedddd [----ssss size] [----SSSS delay] [----ffffCCCC] [----pppp priority]
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- DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
- _c_a_c_h_e_d monitors the number of single bit errors in the secondary cache of
- each cpu. It reports the number of single bit errors encountered on any
- cpu each time it runs.
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- The ----ssss _s_i_z_e parameter determines the size of the cpu secondary cache in
- bytes. If no value is specified, the default value of 4194304 (4 MB) is
- used.
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- The ----SSSS _d_e_l_a_y parameter indicates the amount of time to wait each time
- between examining the secondary caches. This delay is in seconds and the
- default is 3600 seconds (one hour). The -C option must be used for this
- option to mean anything useful.
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- The ----pppp _p_r_i_o_r_i_t_y parameter indicates the priority cached will be run at.
- The value can be in the range -20 to 20 with -20 being the highest
- priority and 20 being the lowest. The priority defaults to 10.
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- The ----ffff parameter indicates that cached should run on all enabled cpus.
- Normally cached does not run on restricted cpus.
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- The ----CCCC parameter indicates that cached should run continuously, sleeping
- and running the check of secondary caches forever. If this option is not
- specified, the program runs once and then exits.
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- OOOOVVVVEEEERRRRVVVVIIIIEEEEWWWW
- _c_a_c_h_e_d uses the R10000 performance registers at the user level to monitor
- the number of single bit cache errors. Single bit errors are
- automatically corrected by the hardware. If the secondary cache has
- numerous single bit errors, there is a possibility that these could turn
- into multi-bit errors which are fatal for the system. Monitoring the
- number of single bit errors provides a means of warning the user early
- enough so that the cpu module containing the cache may be replaced.
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- _c_a_c_h_e_d runs at a very low priority by default so as not to interfere with
- the normal usage of the machine.
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- NNNNOOOOTTTTEEEESSSS
- _c_a_c_h_e_d is run as a cron job and can be turned off or controlled using the
- _d_i_a_g_s_e_t_u_p script.
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- To avoid disruptions to real-time usage, cached normally does not run on
- isolated or restricted cpus. This can be overridden by using the -f flag.
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- PPPPaaaaggggeeee 1111
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- ccccaaaacccchhhheeeedddd((((1111MMMM)))) ccccaaaacccchhhheeeedddd((((1111MMMM))))
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- FFFFIIIILLLLEEEESSSS
- /usr/diags the diag user's home directory
- /usr/diags/bin/cached location of cached executable
- /usr/diags/bin/diagsetup script to control the periodic running of
- testfpu and cached
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- FFFFIIIILLLLEEEESSSS
- SSSSEEEEEEEE AAAALLLLSSSSOOOO
- testfpu(1M), diagsetup(1M)
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- RRRREEEESSSSTTTTRRRRIIIICCCCTTTTIIIIOOOONNNNSSSS
- This command works only on MIPS R10000 systems.
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- PPPPaaaaggggeeee 2222
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