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add mail_ping_irq example

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This commit is contained in:
Simon Pickartz 2011-07-02 17:51:25 +02:00
parent c2341562c7
commit f3c241d1fe
2 changed files with 73 additions and 11 deletions
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81
arch/x86/scc/icc.c
View file

@ -210,7 +210,7 @@ int icc_halt(void)
return 0;
}
#define ROUNDS 100000
#define ROUNDS 10000
int icc_mail_ping( void )
{
@ -271,6 +271,61 @@ int icc_mail_ping( void )
return 0;
}
int icc_mail_ping_irq( void )
{
/* return if not core 0 */
if( my_ue ) return;
uint32_t flags;
uint64_t timer;
int rem_rank = (my_ue+1)%2;
int i;
iRCCE_MAIL_HEADER* recv_header = NULL;
kprintf( "Hello from mail_ping ... \n" );
// disable interrupts
flags = irq_nested_disable();
for( i=0; i<ROUNDS+1; ++i ) {
if( my_ue == 0 ) {
/* send ping request */
iRCCE_mail_send(0, PING_REQ, 0, NULL, rem_rank);
/* send interrupt */
icc_send_irq(rem_rank);
/* wait for response */
do {
iRCCE_mail_recv(&recv_header);
} while( !recv_header );
/* release mail */
iRCCE_mail_release(&recv_header);
}
/* start timer in first round */
if( i == 0 ) timer = rdtsc();
}
/* stop timer */
timer = rdtsc() - timer;
kprintf( "timer = %d\n", timer );
if( my_ue == 0 ) {
kprintf( "mail_pingpong needs in average %f µsec (%d ticks)!\n",
timer/(2.0*ROUNDS*533), timer/(2*ROUNDS) );
}
irq_nested_enable(flags);
return 0;
}
void icc_mail_check(void)
{
iRCCE_MAIL_HEADER* header = NULL;
@ -279,18 +334,24 @@ void icc_mail_check(void)
// empty mailbox and interpret headers
while( (res = iRCCE_mail_recv( &header )) == iRCCE_SUCCESS ) {
if( header->tag == 1 ) {
iRCCE_mail_send( 0, 2, 0, NULL, header->source );
}
else if( header->tag == iRCCE_ANYLENGTH ) {
switch( header->tag ) {
case iRCCE_ANYLENGTH:
recv_buffer = (char*)kmalloc( header->size );
iRCCE_irecv( recv_buffer, header->size, header->source, NULL );
iRCCE_mail_send( 0, 2, 0, NULL, header->source );
}
else if( header->tag == iRCCE_ANYLENGTH_PIGGYBACK ) {
iRCCE_mail_send( 0, 2, 0, NULL, header->source );
iRCCE_irecv(recv_buffer, header->size,
header->source, NULL );
iRCCE_mail_send(0, 2, 0, NULL, header->source);
break;
case iRCCE_ANYLENGTH_PIGGYBACK:
iRCCE_mail_send(0, 2, 0, NULL, header->source);
break;
case PING_REQ:
iRCCE_mail_send(0, PING_RESP, 0, NULL, header->source);
break;
}
iRCCE_mail_release( &header );
}
}

3
kernel/tests.c
View file

@ -88,7 +88,8 @@ static int STDCALL foo(void* arg)
#ifdef CONFIG_ROCKCREEK
int STDCALL mail_ping(void* arg) {
icc_mail_ping();
// icc_mail_ping();
icc_mail_ping_irq();
icc_halt();
return 0;