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