Problem: VTune
Profiler is Slow on X-Servers with SSH Connection
VTune
is Slow on X-Servers with SSH Connection Profiler
Intel® VTune™
GUI may respond slowly when you run a remote Linux* collection using an X11-forwarding/X-server.
Profiler
Cause
The GUI response may be slow if you use an X-server (for example, Xming*) with SSH on Windows to run the
VTune
GUI on a connected Linux machine and the X-server is slow.
Profiler
Solution
Option 1: Enable Traffic Compression
Compression may help if you are forwarding X sessions on a dial-up or slow network. Turn on the compression with
ssh -C
or specify
Compression yes
in your configuration file.
SSH obtains configuration data in the following order:
- ssh -Ccommand-line option
- user configuration file (~/.ssh/config)
- system configuration file (/etc/ssh/ssh_config)
You can explore all available options with
man ssh_config
.
Option 2: Change Your Encryption Cipher
The default cipher on many systems is triple DES (3DES), which is slower than Blowfish and AES. New versions of OpenSSH default to Blowfish. You can change the cipher to Blowfish with
ssh -c blowfish
.
Change your configuration file with the
Cipher
option depending on whether you are connecting with SSH1 or SSH2:
- for SSH1, useCipher blowfish
- for SSH2, useCiphers blowfish-cbc,aes128-cbc,3des-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc
You may also follow recommendations provided in the documentation to an X-server you are using.