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[undi] Profile transmit and receive datapaths 

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown 2014-05-03 12:34:16 +01:00
parent 50689a8974
commit 402ce65632
1 changed files with 33 additions and 1 deletions
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34
src/arch/i386/drivers/net/undinet.c
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@ -33,6 +33,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
#include <ipxe/netdevice.h>
#include <ipxe/if_ether.h>
#include <ipxe/ethernet.h>
#include <ipxe/profile.h>
#include <undi.h>
#include <undinet.h>
#include <pxeparent.h>
@ -79,6 +80,26 @@ static void undinet_close ( struct net_device *netdev );
/** Address of UNDI entry point */
static SEGOFF16_t undinet_entry;
/** Transmit profiler */
static struct profiler undinet_tx_profiler __profiler =
{ .name = "undinet.tx" };
/** Transmit call profiler */
static struct profiler undinet_tx_call_profiler __profiler =
{ .name = "undinet.tx_call" };
/** IRQ profiler */
static struct profiler undinet_irq_profiler __profiler =
{ .name = "undinet.irq" };
/** ISR call profiler */
static struct profiler undinet_isr_call_profiler __profiler =
{ .name = "undinet.isr_call" };
/** Receive profiler */
static struct profiler undinet_rx_profiler __profiler =
{ .name = "undinet.rx" };
/*****************************************************************************
*
* UNDI interrupt service routine
@ -194,6 +215,9 @@ static int undinet_transmit ( struct net_device *netdev,
size_t len;
int rc;
/* Start profiling */
profile_start ( &undinet_tx_profiler );
/* Technically, we ought to make sure that the previous
* transmission has completed before we re-use the buffer.
* However, many PXE stacks (including at least some Intel PXE
@ -256,14 +280,16 @@ static int undinet_transmit ( struct net_device *netdev,
undinet_tbd.Xmit.offset = __from_data16 ( basemem_packet );
/* Issue PXE API call */
profile_start ( &undinet_tx_call_profiler );
if ( ( rc = pxeparent_call ( undinet_entry, PXENV_UNDI_TRANSMIT,
&undi_transmit,
sizeof ( undi_transmit ) ) ) != 0 )
goto done;
profile_stop ( &undinet_tx_call_profiler );
/* Free I/O buffer */
netdev_tx_complete ( netdev, iobuf );
profile_stop ( &undinet_tx_profiler );
done:
return rc;
}
@ -316,10 +342,12 @@ static void undinet_poll ( struct net_device *netdev ) {
*/
if ( ! undinet_isr_triggered() ) {
/* Allow interrupt to occur */
profile_start ( &undinet_irq_profiler );
__asm__ __volatile__ ( REAL_CODE ( "sti\n\t"
"nop\n\t"
"nop\n\t"
"cli\n\t" ) : : );
profile_stop ( &undinet_irq_profiler );
/* If interrupts are known to be supported,
* then do nothing on this poll; wait for the
@ -339,16 +367,19 @@ static void undinet_poll ( struct net_device *netdev ) {
/* Run through the ISR loop */
while ( 1 ) {
profile_start ( &undinet_isr_call_profiler );
if ( ( rc = pxeparent_call ( undinet_entry, PXENV_UNDI_ISR,
&undi_isr,
sizeof ( undi_isr ) ) ) != 0 )
break;
profile_stop ( &undinet_isr_call_profiler );
switch ( undi_isr.FuncFlag ) {
case PXENV_UNDI_ISR_OUT_TRANSMIT:
/* We don't care about transmit completions */
break;
case PXENV_UNDI_ISR_OUT_RECEIVE:
/* Packet fragment received */
profile_start ( &undinet_rx_profiler );
len = undi_isr.FrameLength;
frag_len = undi_isr.BufferLength;
reserve_len = ( -undi_isr.FrameHeaderLength &
@ -393,6 +424,7 @@ static void undinet_poll ( struct net_device *netdev ) {
if ( undinic->hacks & UNDI_HACK_EB54 )
--last_trigger_count;
}
profile_stop ( &undinet_rx_profiler );
break;
case PXENV_UNDI_ISR_OUT_DONE:
/* Processing complete */