sysfs-bus-vmbus (6744B)
1What: /sys/bus/vmbus/hibernation 2Date: Jan 2021 3KernelVersion: 5.12 4Contact: Dexuan Cui <decui@microsoft.com> 5Description: Whether the host supports hibernation for the VM. 6Users: Daemon that sets up swap partition/file for hibernation. 7 8What: /sys/bus/vmbus/devices/<UUID>/id 9Date: Jul 2009 10KernelVersion: 2.6.31 11Contact: K. Y. Srinivasan <kys@microsoft.com> 12Description: The VMBus child_relid of the device's primary channel 13Users: tools/hv/lsvmbus 14 15What: /sys/bus/vmbus/devices/<UUID>/class_id 16Date: Jul 2009 17KernelVersion: 2.6.31 18Contact: K. Y. Srinivasan <kys@microsoft.com> 19Description: The VMBus interface type GUID of the device 20Users: tools/hv/lsvmbus 21 22What: /sys/bus/vmbus/devices/<UUID>/device_id 23Date: Jul 2009 24KernelVersion: 2.6.31 25Contact: K. Y. Srinivasan <kys@microsoft.com> 26Description: The VMBus interface instance GUID of the device 27Users: tools/hv/lsvmbus 28 29What: /sys/bus/vmbus/devices/<UUID>/channel_vp_mapping 30Date: Jul 2015 31KernelVersion: 4.2.0 32Contact: K. Y. Srinivasan <kys@microsoft.com> 33Description: The mapping of which primary/sub channels are bound to which 34 Virtual Processors. 35 Format: <channel's child_relid:the bound cpu's number> 36Users: tools/hv/lsvmbus 37 38What: /sys/bus/vmbus/devices/<UUID>/device 39Date: Dec. 2015 40KernelVersion: 4.5 41Contact: K. Y. Srinivasan <kys@microsoft.com> 42Description: The 16 bit device ID of the device 43Users: tools/hv/lsvmbus and user level RDMA libraries 44 45What: /sys/bus/vmbus/devices/<UUID>/vendor 46Date: Dec. 2015 47KernelVersion: 4.5 48Contact: K. Y. Srinivasan <kys@microsoft.com> 49Description: The 16 bit vendor ID of the device 50Users: tools/hv/lsvmbus and user level RDMA libraries 51 52What: /sys/bus/vmbus/devices/<UUID>/numa_node 53Date: Jul 2018 54KernelVersion: 4.19 55Contact: Stephen Hemminger <sthemmin@microsoft.com> 56Description: This NUMA node to which the VMBUS device is 57 attached, or -1 if the node is unknown. 58 59What: /sys/bus/vmbus/devices/<UUID>/channels/<N> 60Date: September. 2017 61KernelVersion: 4.14 62Contact: Stephen Hemminger <sthemmin@microsoft.com> 63Description: Directory for per-channel information 64 NN is the VMBUS relid associated with the channel. 65 66What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/cpu 67Date: September. 2017 68KernelVersion: 4.14 69Contact: Stephen Hemminger <sthemmin@microsoft.com> 70Description: VCPU (sub)channel is affinitized to 71Users: tools/hv/lsvmbus and other debugging tools 72 73What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/in_mask 74Date: September. 2017 75KernelVersion: 4.14 76Contact: Stephen Hemminger <sthemmin@microsoft.com> 77Description: Host to guest channel interrupt mask 78Users: Debugging tools 79 80What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/latency 81Date: September. 2017 82KernelVersion: 4.14 83Contact: Stephen Hemminger <sthemmin@microsoft.com> 84Description: Channel signaling latency. This file is available only for 85 performance critical channels (storage, network, etc.) that use 86 the monitor page mechanism. 87Users: Debugging tools 88 89What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/out_mask 90Date: September. 2017 91KernelVersion: 4.14 92Contact: Stephen Hemminger <sthemmin@microsoft.com> 93Description: Guest to host channel interrupt mask 94Users: Debugging tools 95 96What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/pending 97Date: September. 2017 98KernelVersion: 4.14 99Contact: Stephen Hemminger <sthemmin@microsoft.com> 100Description: Channel interrupt pending state. This file is available only for 101 performance critical channels (storage, network, etc.) that use 102 the monitor page mechanism. 103Users: Debugging tools 104 105What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/read_avail 106Date: September. 2017 107KernelVersion: 4.14 108Contact: Stephen Hemminger <sthemmin@microsoft.com> 109Description: Bytes available to read 110Users: Debugging tools 111 112What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/write_avail 113Date: September. 2017 114KernelVersion: 4.14 115Contact: Stephen Hemminger <sthemmin@microsoft.com> 116Description: Bytes available to write 117Users: Debugging tools 118 119What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/events 120Date: September. 2017 121KernelVersion: 4.14 122Contact: Stephen Hemminger <sthemmin@microsoft.com> 123Description: Number of times we have signaled the host 124Users: Debugging tools 125 126What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/interrupts 127Date: September. 2017 128KernelVersion: 4.14 129Contact: Stephen Hemminger <sthemmin@microsoft.com> 130Description: Number of times we have taken an interrupt (incoming) 131Users: Debugging tools 132 133What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/subchannel_id 134Date: January. 2018 135KernelVersion: 4.16 136Contact: Stephen Hemminger <sthemmin@microsoft.com> 137Description: Subchannel ID associated with VMBUS channel 138Users: Debugging tools and userspace drivers 139 140What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/monitor_id 141Date: January. 2018 142KernelVersion: 4.16 143Contact: Stephen Hemminger <sthemmin@microsoft.com> 144Description: Monitor bit associated with channel. This file is available only 145 for performance critical channels (storage, network, etc.) that 146 use the monitor page mechanism. 147Users: Debugging tools and userspace drivers 148 149What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/ring 150Date: January. 2018 151KernelVersion: 4.16 152Contact: Stephen Hemminger <sthemmin@microsoft.com> 153Description: Binary file created by uio_hv_generic for ring buffer 154Users: Userspace drivers 155 156What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/intr_in_full 157Date: February 2019 158KernelVersion: 5.0 159Contact: Michael Kelley <mikelley@microsoft.com> 160Description: Number of guest to host interrupts caused by the inbound ring 161 buffer transitioning from full to not full while a packet is 162 waiting for buffer space to become available 163Users: Debugging tools 164 165What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/intr_out_empty 166Date: February 2019 167KernelVersion: 5.0 168Contact: Michael Kelley <mikelley@microsoft.com> 169Description: Number of guest to host interrupts caused by the outbound ring 170 buffer transitioning from empty to not empty 171Users: Debugging tools 172 173What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/out_full_first 174Date: February 2019 175KernelVersion: 5.0 176Contact: Michael Kelley <mikelley@microsoft.com> 177Description: Number of write operations that were the first to encounter an 178 outbound ring buffer full condition 179Users: Debugging tools 180 181What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/out_full_total 182Date: February 2019 183KernelVersion: 5.0 184Contact: Michael Kelley <mikelley@microsoft.com> 185Description: Total number of write operations that encountered an outbound 186 ring buffer full condition 187Users: Debugging tools