RemoteFX User Experience - VM Test

Microsoft RemoteFX™ enables the delivery of a full Windows user experience to a range of client devices including rich clients, thin clients, and ultrathin clients. RemoteFX delivers a rich user experience for Virtual Desktop Infrastructure (VDI) by providing a 3D virtual adapter, intelligent codecs, and the ability to redirect USB devices in virtual machines. RemoteFX is integrated with the RDP protocol, which enables shared encryption, authentication, management, and device support. RemoteFX also delivers a rich user experience for session-based desktops and RemoteApp programs to a broad range of client devices.

If a remote user’s experience with a RemoteFX-enabled virtual desktop on the cloud is poor, then administrators should be able to quickly figure out what is causing the quality of the UX to suffer – is it poor frame quality? or severe packet loss? or bad picture output owing to a high compression ratio? or bottleneck in TCP/UDP connectivity? The RemoteFX User Experience - VM test helps answer this question. For each remote user connecting to a RemoteFX-enabled Windows virtual desktop, this test measures user experience and reports abnormalities (if any). This way, users who are experiencing a poor visual experience can be isolated and the reason for the same can be ascertained. In addition, the test points you to RemoteFX features that may have to be tweaked in order to improve overall performance.

Target of the test : A Windows virtual desktop on the cloud

Agent deploying the test : A remote agent

Outputs of the test : One set of results for every user_on_virtual desktop

Configurable parameters for the test
Parameter Description

Test Period

How often should the test be executed.

Host

The nick name of the Cloud Desktops component for which this test is to be configured.

Port

Refers to the port at which the specified host listens to. By default, this is NULL.

Inside View Using

To obtain the 'inside view' of performance of the cloud-hosted Windows desktops - i.e., to measure the internal performance of the Windows virtual desktops - this test uses a light-weight eG VM Agent software deployed on each of the desktops. Accordingly, this parameter is by default set to eG VM Agent (Windows).

Report Powered OS

This flag is relevant only for those tests that are mapped to the Inside View of Desktops layer. If this flag is set to Yes (which is the default setting), then the 'inside view' tests will report measures for even those Windows virtual desktops that do not have any users logged in currently. Such desktops will be identified by their name and not by the username_on_virtualdesktopname. On the other hand, if this flag is set to No, then this test will not report measures for those Windows virtual desktops to which no users are logged in currently.

Is Cloud VMs

Since this test runs for a 'Cloud Desktops' component, this flag is set to Yes by default.

Measurements made by the test
Measurement Description Measurement Unit Interpretation

Average frames encoding time

Indicates the average time taken for encoding the frames of this user.

Secs

Compare the value of this measure across users to know for which user frames encoding took too long.

Frame quality

Indicates the quality of the output frame expressed as a percentage of the quality of the source frame for this user.

Percent

High frame rates produce a smooth representation of frames for the particular user, while low frame rates may cause rough or choppy representation of frames for the particular user. A high value is hence desired for this measure.

Compare the value of this measure across users to know which user received the poorest frame quality.

Frames skipped due to insufficient client resources

Indicates the rate at which frames were skipped for this user due to insufficient client resources.

Frames/Sec

A low value is desired for this measure. Compare the value of this measure across users to know which user is connecting from a client sized with inadequate resources.

Frames skipped due to insufficient network resources

Indicates the rate at which frames were skipped for this user due to insufficient network resources.

Frames/Sec

A low value is desired for this measure. Compare the value of this measure across users to know which user is connecting via a network that is sized with inadequate resources.

Frames skipped due to insufficient server resources

Indicates the rate at which frames were skipped for this user due to insufficient server resources.

Frames/Sec

A low value is desired for this measure. Compare the value of this measure across users to know which user was unable to receive frames due to the lack of enough resources on the XenServer.

Graphics compression ratio

Indicates the ratio of the number of bytes encoded to the number of bytes input for this user.

Percent

The compression ratio typically affects the quality of the picture. Generally, the higher the compression ratio, the poorer the quality of the resulting picture. Ideally therefore, the value of this measure should be 0. You can compare the value of this measure across users to identify that user whose picture output was very poor owing to high compression.

Input frames

Indicates the number of source frames provided per second as input to the RemoteFx graphics for this user.

Frames/Sec

Output Frames

Indicates the number of source frames sent per second to this user as output of RemoteFx graphics.

Frames/Sec

Source frames

Indicates number of frames per second composed at the source for this user.

Frames/Sec

Base TCP round trip time

Indicates the time between initiating a network request and receiving a response over TCP for this user.

Seconds

A high value for this measure could indicate a bottleneck in TCP connectivity between the user terminal and the server.

Base UDP round trip time

Indicates the time between initiating a network request and receiving a response over UDP for this user.

Seconds

A high value for this measure could indicate a bottleneck in UDP connectivity between the user terminal and the server.

Current TCP bandwidth

Indicates the amount of data that is currently carried from one point to another over TCP for this user.

Kbps

A consistent rise in the value of this measure could indicate that TCP traffic to/from the user is consuming bandwidth excessively. Compare the value of this measure across users to identify that user who is performing bandwidth-intensive operations on the XenServer.

Current TCP round trip time

Indicates the average time between initiating a network request and receiving a response over TCP for this user.

Seconds

A high value could indicate a current problem with TCP connectivity between the user terminal and the server.

Current UDP bandwidth

Indicates the amount of data that is currently carried from one point to another over UDP for this user.

Kbps

A consistent rise in the value of this measure could indicate that UDP traffic to/from the user is consuming bandwidth excessively. Compare the value of this measure across users to identify that user who is performing bandwidth-intensive operations on the XenServer.

Current UDP round trip time

Indicates the average time between initiating a network request and receiving a response over UDP for this user.

Secs

A high value could indicate a current problem with UDP connectivity between the user terminal and the server.

Forward error correction

Indicates the percentage of forward error corrections performed for this user.

Percent

RemoteFX UDP transport uses Forward Error Correction (FEC) to recover from the lost data packets. In the cases where such packets can be recovered, the transport doesn’t need to wait for the data to be retransmitted, which allows immediate delivery of data and prevents Head of Line Blocking. Preventing this stall results in an overall improved responsiveness.

A high value is hence desired for this measure.

Loss

Indicates the percentage of packets lost when being transmitted to this user.

Percent

A high value indicates that a large number of packets were lost without being retransmitted. By comparing the value of this measure across users, you can find that user who has suffered the maximum data loss. This could be owing to a bad network connection between the remote user terminal and the server.

Retransmissions

Indicates the percentage of packets that have been retransmitted to this user.

Percent

Retransmissions should only occur when it is certain that a packet to be retransmitted was actually lost. Redundant retransmissions can also occur because of lost acknowledgments, coarse feedback, and bad retransmissions. Retransmission rates over 5% can indicate degraded network performance on a LAN. The internet may vary between 5 and 15 percent depending upon traffic conditions. Any value above 25 percent indicates an excessive number of retransmissions that will significantly increase the time for the file transfer and annoy the user.

TCP received rate

Indicates the rate at which the data is received over TCP for this user.

Kbps

A high value is desired for these measures as it indicates high TCP throughput.

TCP sent rate

Indicates the rate at which the data is sent over TCP for this user.

Kbps

UDP received rate

Indicates the rate at which the data is received over UDP for this user.

Kbps

A high value is desired for these measures as it indicates high UDP throughput.

UDP sent rate

Indicates the rate at which the data is sent over UDP for this user.

Kbps