From: "Stefan Sommerfeld" <sommerfeld@mikrom.de>
To: <ecos-discuss@ecos.sourceware.org>
Subject: Re: [ECOS] Re: DSR Scheduling Problem
Date: Wed, 15 Feb 2006 13:23:00 -0000 [thread overview]
Message-ID: <005001c63232$9262cd20$8262fea9@nullnullsix> (raw)
In-Reply-To: <87bqx9rlls.fsf@javad.com>
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Hi,
I've added a DSR FIFO option which works like the LIST version, but in FIFO
order. I've tested it for some time now and it works will. Please give it a
try.
Bye....
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Index: cdl/interrupts.cdl
===================================================================
RCS file: /cvs/ecos/ecos/packages/kernel/current/cdl/interrupts.cdl,v
retrieving revision 1.4
diff -w -u -r1.4 interrupts.cdl
--- cdl/interrupts.cdl 23 May 2002 23:06:45 -0000 1.4
+++ cdl/interrupts.cdl 15 Feb 2006 13:07:22 -0000
@@ -87,6 +87,21 @@
possibility of a table overflow occurring."
}
+ cdl_option CYGIMP_KERNEL_INTERRUPTS_DSRS_FIFO {
+ display "Use FIFO for DSRs "
+ default_value 0
+ implements CYGINT_KERNEL_INTERRUPTS_DSRS
+ description "
+ When DSR support is enabled the kernel must keep track of all
+ the DSRs that are pending. This information can be kept in a
+ fixed-size table or in a linked list. The list implementation
+ requires that the kernel disable interrupts for a very short
+ period of time outside interrupt handlers, but there is no
+ possibility of a table overflow occurring. Instead of LIST this
+ implementation processed the DSR and first come, first serve
+ order, which reduces the ISR to DSR delay."
+ }
+
cdl_component CYGIMP_KERNEL_INTERRUPTS_DSRS_TABLE {
display "Use fixed-size table for DSRs"
default_value 0
Index: include/intr.hxx
===================================================================
RCS file: /cvs/ecos/ecos/packages/kernel/current/include/intr.hxx,v
retrieving revision 1.11
diff -w -u -r1.11 intr.hxx
--- include/intr.hxx 23 May 2002 23:06:47 -0000 1.11
+++ include/intr.hxx 15 Feb 2006 12:41:10 -0000
@@ -187,6 +187,7 @@
CYGBLD_ANNOTATE_VARIABLE_INTR;
#endif
+
#ifdef CYGIMP_KERNEL_INTERRUPTS_DSRS_LIST
// Number of DSR posts made
@@ -201,6 +202,22 @@
#endif
+#ifdef CYGIMP_KERNEL_INTERRUPTS_DSRS_FIFO
+
+ // Number of DSR posts made
+ volatile cyg_ucount32 dsr_count CYGBLD_ANNOTATE_VARIABLE_INTR;
+
+ // next DSR in list
+ Cyg_Interrupt* volatile next_dsr CYGBLD_ANNOTATE_VARIABLE_INTR;
+
+ // static list of pending DSRs
+ static Cyg_Interrupt* volatile dsr_list[CYGNUM_KERNEL_CPU_MAX]
+ CYGBLD_ANNOTATE_VARIABLE_INTR;
+ static Cyg_Interrupt* volatile last_dsr[CYGNUM_KERNEL_CPU_MAX]
+ CYGBLD_ANNOTATE_VARIABLE_INTR;
+
+#endif
+
#ifdef CYGIMP_KERNEL_INTERRUPTS_CHAIN
// The default mechanism for handling interrupts is to attach just
Index: src/intr/intr.cxx
===================================================================
RCS file: /cvs/ecos/ecos/packages/kernel/current/src/intr/intr.cxx,v
retrieving revision 1.17
diff -w -u -r1.17 intr.cxx
--- src/intr/intr.cxx 23 May 2002 23:06:54 -0000 1.17
+++ src/intr/intr.cxx 15 Feb 2006 12:38:38 -0000
@@ -100,6 +100,13 @@
#endif
+#ifdef CYGIMP_KERNEL_INTERRUPTS_DSRS_FIFO
+
+ dsr_count = 0;
+ next_dsr = NULL;
+
+#endif
+
#ifdef CYGIMP_KERNEL_INTERRUPTS_CHAIN
next = NULL;
@@ -139,6 +146,13 @@
#endif
+#ifdef CYGIMP_KERNEL_INTERRUPTS_DSRS_FIFO
+
+Cyg_Interrupt* volatile Cyg_Interrupt::dsr_list[CYGNUM_KERNEL_CPU_MAX];
+Cyg_Interrupt* volatile Cyg_Interrupt::last_dsr[CYGNUM_KERNEL_CPU_MAX];
+
+#endif
+
// -------------------------------------------------------------------------
// Call any pending DSRs
@@ -193,6 +207,38 @@
#endif
+#ifdef CYGIMP_KERNEL_INTERRUPTS_DSRS_FIFO
+
+ cyg_uint32 old_intr;
+ HAL_DISABLE_INTERRUPTS(old_intr);
+ while( dsr_list[cpu] != NULL )
+ {
+ Cyg_Interrupt* intr;
+ cyg_count32 count;
+
+
+ intr = dsr_list[cpu];
+ dsr_list[cpu] = intr->next_dsr;
+ count = intr->dsr_count;
+ intr->dsr_count = 0;
+ intr->next_dsr = 0;
+ if (dsr_list[cpu] == NULL)
+ {
+ last_dsr[cpu] = NULL;
+ }
+
+ HAL_RESTORE_INTERRUPTS(old_intr);
+
+ CYG_ASSERT( intr->dsr != NULL , "No DSR defined");
+
+ intr->dsr( intr->vector, count, (CYG_ADDRWORD)intr->data );
+
+ HAL_DISABLE_INTERRUPTS(old_intr);
+ }
+ HAL_RESTORE_INTERRUPTS(old_intr);
+
+#endif
+
};
externC void
@@ -257,6 +303,27 @@
#endif
+#ifdef CYGIMP_KERNEL_INTERRUPTS_DSRS_FIFO
+
+ // Only add the interrupt to the dsr list if this is
+ // the first DSR call.
+
+ if( dsr_count++ == 0 )
+ {
+ Cyg_Interrupt* cur_last_dsr = last_dsr[cpu];
+ if (cur_last_dsr)
+ {
+ cur_last_dsr->next_dsr = this;
+ }
+ else
+ {
+ dsr_list[cpu] = this;
+ }
+ last_dsr[cpu] = this;
+ }
+
+#endif
+
HAL_RESTORE_INTERRUPTS(old_intr);
};
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--
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next prev parent reply other threads:[~2006-02-15 13:23 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-14 0:45 Jay Foster
2006-01-14 2:12 ` Grant Edwards
2006-01-14 3:04 ` Paul D. DeRocco
2006-01-14 3:40 ` Grant Edwards
2006-01-16 8:40 ` Daniel Néri
2006-01-16 10:36 ` Nick Garnett
2006-01-16 11:45 ` [ECOS] Generic 16x5x serial driver use of transmit FIFO (was: DSR Scheduling Problem) Daniel Néri
2006-01-16 12:23 ` Nick Garnett
2006-01-16 15:13 ` [ECOS] Re: DSR Scheduling Problem Grant Edwards
2006-01-17 9:43 ` Andrew Lunn
2006-01-16 8:27 ` Dirk Husemann
2006-01-16 15:11 ` Grant Edwards
2006-02-13 10:41 ` Sergei Organov
2006-02-15 2:06 ` Brett Delmage
2006-02-15 9:57 ` Sergei Organov
2006-02-15 13:23 ` Stefan Sommerfeld [this message]
2006-02-15 14:07 ` Sergei Organov
2006-02-15 14:14 ` Stefan Sommerfeld
2006-02-15 15:54 ` Grant Edwards
2006-02-15 15:53 ` Grant Edwards
2006-02-15 18:30 ` Nick Garnett
2006-02-15 19:30 ` Sergei Organov
2006-02-16 10:00 ` Nick Garnett
2006-02-16 13:09 ` Sergei Organov
2006-02-15 19:36 ` Sergei Organov
2006-02-15 19:57 ` Grant Edwards
2006-02-16 14:08 ` Sergei Organov
2006-02-15 16:34 ` Brett Delmage
2006-01-14 8:23 ` Andrew Lunn
2006-01-16 10:27 ` Nick Garnett
-- strict thread matches above, loose matches on Subject: below --
2006-02-13 14:51 Uwe Kindler
2006-02-13 15:26 ` Grant Edwards
2006-01-13 23:01 [ECOS] " Jay Foster
2006-01-13 23:38 ` [ECOS] " Grant Edwards
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