I'm running into an issue where SSH sessions stall/freeze after upgrading a VMWare guest from FreeBSD 11.3 to 12.1. The issue surfaces while trying to run the ls command in a directory containing lots of files, for example. It's also pretty apparent when executing the following script:
My putty session usually just stalls between lines 2000 and 8000. On occasion it will start working again after 30 seconds or so. Otherwise, I have to restart it.
VMXNET3 support is compiled in the kernel:
The guest has open-vm-tools-11.0.1_2,2 installed.
Iperf is showing really poor performance when running in client mode on the affected guest. The performance looks great when running in server mode.
I tried setting up a brand new/clean VM with 12.1 and it's having the exact same problem.
In case this matters, the underlying hypervisor version is ESXi 6.0 and its backbone is 10Gbps copper.
Code:
#!/usr/local/bin/bash
for i in {1..10000}
do echo $i
done
My putty session usually just stalls between lines 2000 and 8000. On occasion it will start working again after 30 seconds or so. Otherwise, I have to restart it.
VMXNET3 support is compiled in the kernel:
Code:
device vmx # VMware VMXNET3 Ethernet
The guest has open-vm-tools-11.0.1_2,2 installed.
Iperf is showing really poor performance when running in client mode on the affected guest. The performance looks great when running in server mode.
Code:
# iperf -c 10.x.x.50
------------------------------------------------------------
Client connecting to 10.x.x.50, TCP port 5001
TCP window size: 32.8 KByte (default)
------------------------------------------------------------
[ 3] local 10.x.x.54 port 18909 connected with 10.x.x.50 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-29.7 sec 128 KBytes 35.4 Kbits/sec
# iperf -s
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 64.0 KByte (default)
------------------------------------------------------------
[ 4] local 10.x.x.54 port 5001 connected with 10.x.x.50 port 21015
[ ID] Interval Transfer Bandwidth
[ 4] 0.0-10.0 sec 6.45 GBytes 5.53 Gbits/sec
I tried setting up a brand new/clean VM with 12.1 and it's having the exact same problem.
In case this matters, the underlying hypervisor version is ESXi 6.0 and its backbone is 10Gbps copper.