From: R Vamshi Krishna <vamshi@cse.iitb.ac.in>
To: ecos-discuss@ecos.sourceware.org
Subject: [ECOS] RTAI vs eCos
Date: Mon, 17 Apr 2006 16:05:00 -0000 [thread overview]
Message-ID: <Pine.LNX.4.61.0604121447210.27074@mars.cse.iitb.ac.in> (raw)
I am working towards making eCos a hard real-time kernel. i.e to say each
kernel primitive is deterministic and bounded by time.
But to find out what is currently making eCos being tagged as a soft
real-time system, I have reached a dead end.
Initially I thought that the way the threads are dequeued in semaphores
maybe an indicator. i.e the time to execute cyg_sem_signal() depends on
the no. of threads blocked. Since (I thought) it was not deterministic, I
tried to see RTAI's approach.
But RTAI instead enqueues, (PRIO_Q option) and this depends on no. of
tasks blocked.
Can someone tell my what makes RTAI a hard real-time RTOS and not eCos.
It will be really helpful.
--
Regards,
Vamshi
-------------------------------------------------
R.Vamshi Krishna,
M.Tech. CSE (II year),
IIT Bombay
Room no. 320, A-wing, Hostel-12
Mobile : +919869781633
-------------------------------------------------
Yesterday is a past, tomorrow is a future , today is a gift that's why it's called 'present'
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next reply other threads:[~2006-04-17 16:05 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-17 16:05 R Vamshi Krishna [this message]
2006-04-19 10:33 ` Nick Garnett
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