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| author | Michael Brown | 2014-12-12 11:16:26 +0100 |
|---|---|---|
| committer | Michael Brown | 2014-12-12 11:18:03 +0100 |
| commit | d08547309b8c2fe0f24034355a511fa9afb7a76c (patch) | |
| tree | 984242d52cbc8274bc370e220c59bb3d05f57ecb /src/drivers/net/vmxnet3.c | |
| parent | [crypto] Fix parsing of OCSP responder ID key hash (diff) | |
| download | ipxe-d08547309b8c2fe0f24034355a511fa9afb7a76c.tar.gz ipxe-d08547309b8c2fe0f24034355a511fa9afb7a76c.tar.xz ipxe-d08547309b8c2fe0f24034355a511fa9afb7a76c.zip | |
[vmxnet3] Add profiling code to exclude time spent in the hypervisor
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/drivers/net/vmxnet3.c')
| -rw-r--r-- | src/drivers/net/vmxnet3.c | 34 |
1 files changed, 33 insertions, 1 deletions
diff --git a/src/drivers/net/vmxnet3.c b/src/drivers/net/vmxnet3.c index 57013fb9..31082bf6 100644 --- a/src/drivers/net/vmxnet3.c +++ b/src/drivers/net/vmxnet3.c @@ -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 ) { |