RTAI-3.5 calibration information - clarification

[krishnamurthy babu]

   YAHOO.Shortcuts.hasSensitiveText = false; YAHOO.Shortcuts.sensitivityType = []; YAHOO.Shortcuts.doUlt = false; YAHOO.Shortcuts.location = "us"; YAHOO.Shortcuts.lang = "us"; YAHOO.Shortcuts.document_id = 0; YAHOO.Shortcuts.document_type = ""; YAHOO.Shortcuts.document_title = ""; YAHOO.Shortcuts.document_publish_date = ""; YAHOO.Shortcuts.document_author = ""; YAHOO.Shortcuts.document_url = ""; YAHOO.Shortcuts.document_tags = ""; YAHOO.Shortcuts.annotationSet = { "lw_1196396484_0": { "text": "Linux", "extended": 0, "startchar": 1611, "endchar": 1615, "start": 1611, "end": 1615, "extendedFrom": "", "predictedCategory": "ORGANIZATION", "predictionProbability": "0.335433", "weight": 0.35, "type": ["shortcuts:/us/tag/news/thing"], "category": ["CONCEPT"], "context": "9ac15d93 RTAI 200 c0398800 0 Linux 100 RTAI[malloc vmalloced extent df501000" }, "lw_1196396484_1": { "text": "Linux", "extended": 0, "startchar": 2005, "endchar": 2009, "start": 2005, "end": 2009, "extendedFrom":
 "", "predictedCategory": "ORGANIZATION", "predictionProbability": "0.25", "weight": 0.35, "type": ["shortcuts:/us/tag/news/thing"], "category": ["CONCEPT"], "context": "ordering of timed lists RTAI[sched Linux timer freq 250 Hz CPU" }, "lw_1196396484_2": { "text": "CPU", "extended": 0, "startchar": 2034, "endchar": 2036, "start": 2034, "end": 2036, "extendedFrom": "", "predictedCategory": "ORGANIZATION", "predictionProbability": "0.534745", "weight": 0.35, "type": ["shortcuts:/us/class/product"], "category": ["THING"], "context": "Linux timer freq 250 Hz CPU freq 2933909000 hz RTAI[sched timer" }, "lw_1196396484_3": { "text": "Yahoo Mobile", "extended": 0, "startchar": 2230, "endchar": 2241, "start": 2230, "end": 2241, "extendedFrom": "", "predictedCategory": "ORGANIZATION", "predictionProbability": "0.658755", "weight": 0.432124, "type": ["shortcuts:/us/instance/organization/company/yahoo_property"], "category": ["ORGANIZATION"], "context": "your teams follow you with
 Yahoo Mobile Try it now", "metaData": { "yprop_name": "Yahoo! Mobile", "yprop_url": "http://mobile.yahoo.com/" }  }, "lw_1196396484_4": { "text": "Try it now.", "extended": 0, "startchar": 2385, "endchar": 2395, "start": 2385, "end": 2395, "extendedFrom": "", "predictedCategory": "", "predictionProbability": "0", "weight": 1, "type": ["shortcuts:/us/instance/identifier/hyperlink/http"], "category": ["IDENTIFIER"], "context": "", "metaData": { "linkHref": "http://us.rd.yahoo.com/evt=51731/*http://mobile.yahoo.com/sports;_ylt=At9_qDKvtAbMuh1G1SQtBI7ntAcJ", "linkProtocol": "http", "linkRel": "nofollow", "linkTarget": "_blank" }  } };  YAHOO.Shortcuts.overlaySpaceId = "97546169";  YAHOO.Shortcuts.hostSpaceId = "97546168";       Dear RTAI Community,
   
  1. I am new to RTAI and just completed the installation and calibration of RTAI-3.5 based
     on the documentation and mail list archives. I managed all this without bothering you    
     people much, as there is enough precedence.
   
  2. three values are bothering me :
      
     -  RTAI[sched]: timer setup = 999 ns
     -  resched latency = 2944 ns.
     -  LATENCY_APIC 3812 (IN USE 3944)
   
     Please let me know what they really mean and how they are related ? 
     How they will be used by the RTAI during run-time ?
     I do not want to make any assumptions, as terminologies differ from context to context. 
     
  Regards,
   
  babu K
   
  below is what I saw in my system:
  --------------------------------------------------------------
I-pipe: Domain RTAI registered.
  RTAI[hal]: <3.5> mounted over IPIPE-NOTHREADS 1.5-02.
  RTAI[hal]: compiled with gcc version 4.1.1 20061011 (Red Hat 4.1.1-30).
  RTAI[hal]: mounted (IPIPE-NOTHREADS, IMMEDIATE (INTERNAL IRQs VECTORED), ISOL_CPUS_MASK: 0).
  PIPELINE layers:
  df37ae80 9ac15d93 RTAI 200
  c0398800 0 Linux 100
  RTAI[malloc]: vmalloced extent df501000, size 2097152.
  RTAI[malloc]: loaded (global heap size=2097152 bytes).
  RTAI[sched]: loaded (IMMEDIATE, UP, USER/KERNEL SPACE<with RTAI TASKs>: ).
  RTAI[sched]: hard timer type/freq = APIC/8333750(Hz); default timing mode is periodic; linear ordering of timed lists.
  RTAI[sched]: Linux timer freq = 250 (Hz), CPU freq = 2933909000 hz.
  RTAI[sched]: timer setup = 999 ns, resched latency = 2944 ns.



       
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