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[vmxnet3] Add profiling code to exclude time spent in the hypervisor 

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown 2014-12-12 10:16:26 +00:00
parent 5cbdc41778
commit d08547309b
1 changed files with 33 additions and 1 deletions
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34
src/drivers/net/vmxnet3.c
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@ -26,6 +26,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
#include <ipxe/pci.h>
#include <ipxe/io.h>
#include <ipxe/malloc.h>
#include <ipxe/profile.h>
#include <ipxe/iobuf.h>
#include <ipxe/netdevice.h>
#include <ipxe/if_ether.h>
@ -39,6 +40,22 @@ FILE_LICENCE ( GPL2_OR_LATER );
*
*/
/** VM command profiler */
static struct profiler vmxnet3_vm_command_profiler __profiler =
{ .name = "vmxnet3.vm_command" };
/** VM transmit profiler */
static struct profiler vmxnet3_vm_tx_profiler __profiler =
{ .name = "vmxnet3.vm_tx" };
/** VM receive refill profiler */
static struct profiler vmxnet3_vm_refill_profiler __profiler =
{ .name = "vmxnet3.vm_refill" };
/** VM event profiler */
static struct profiler vmxnet3_vm_event_profiler __profiler =
{ .name = "vmxnet3.vm_event" };
/**
* Issue command
*
@ -48,10 +65,16 @@ FILE_LICENCE ( GPL2_OR_LATER );
*/
static inline uint32_t vmxnet3_command ( struct vmxnet3_nic *vmxnet,
uint32_t command ) {
uint32_t result;
/* Issue command */
profile_start ( &vmxnet3_vm_command_profiler );
writel ( command, ( vmxnet->vd + VMXNET3_VD_CMD ) );
return readl ( vmxnet->vd + VMXNET3_VD_CMD );
result = readl ( vmxnet->vd + VMXNET3_VD_CMD );
profile_stop ( &vmxnet3_vm_command_profiler );
profile_exclude ( &vmxnet3_vm_command_profiler );
return result;
}
/**
@ -92,8 +115,11 @@ static int vmxnet3_transmit ( struct net_device *netdev,
/* Hand over descriptor to NIC */
wmb();
profile_start ( &vmxnet3_vm_tx_profiler );
writel ( ( vmxnet->count.tx_prod % VMXNET3_NUM_TX_DESC ),
( vmxnet->pt + VMXNET3_PT_TXPROD ) );
profile_stop ( &vmxnet3_vm_tx_profiler );
profile_exclude ( &vmxnet3_vm_tx_profiler );
return 0;
}
@ -212,8 +238,11 @@ static void vmxnet3_refill_rx ( struct net_device *netdev ) {
/* Hand over any new descriptors to NIC */
if ( vmxnet->count.rx_prod != orig_rx_prod ) {
wmb();
profile_start ( &vmxnet3_vm_refill_profiler );
writel ( ( vmxnet->count.rx_prod % VMXNET3_NUM_RX_DESC ),
( vmxnet->pt + VMXNET3_PT_RXPROD ) );
profile_stop ( &vmxnet3_vm_refill_profiler );
profile_exclude ( &vmxnet3_vm_refill_profiler );
}
}
@ -331,7 +360,10 @@ static void vmxnet3_poll_events ( struct net_device *netdev ) {
events = le32_to_cpu ( vmxnet->dma->shared.ecr );
/* Acknowledge these events */
profile_start ( &vmxnet3_vm_event_profiler );
writel ( events, ( vmxnet->vd + VMXNET3_VD_ECR ) );
profile_stop ( &vmxnet3_vm_event_profiler );
profile_exclude ( &vmxnet3_vm_event_profiler );
/* Check for link state change */
if ( events & VMXNET3_ECR_LINK ) {