Rotation-sensitive units were characterized as follows. The head was kept in a position so that the horizontal (rotation) plane corresponded to the pitch plane of the specimen, 45° from the posterior canal plane. A 5 sec sample of background discharge was recorded, as was the response to a 0.3 Hz sinusoidal head rotation. In some units, responses were obtained to rotational sinusoids at frequencies spaced a half-decade apart from 0.1 to 3.0 Hz. Peak head velocities could be as high as 160°/sec (0.1 Hz), 80°/sec (0.3 Hz), 40°/sec (1.0 Hz), and 20°/sec (3.0 Hz). The number of cycles ranged from eight (0.1 Hz) to 256 (3.0 Hz). Care was taken to keep the rotation amplitude sufficiently small so that the responses appeared linear with no signs of excitatory saturation and, in units with an appreciable background discharge, no inhibitory silencing. Fourier analysis was used to extract the fundamental component of the response. A similar analysis was done on the head velocity signal from the tachometer of the servomechanism. Gains were obtained as the ratio of the response amplitude (in spikes per second) to the head velocity amplitude (in degrees per second). For the phase (in degrees), the head velocity phase was subtracted from the response phase; positive phases correspond to phase leads. Further testing was only done on extracellularly recorded units.
Symptoms: Traffic-groups become active/active for 30 seconds after a long uptime interval. Note: Uptime required to encounter this issue is dependent on the number of traffic groups: the more traffic groups, the shorter the uptime. For example: -- For 7 traffic groups, the interval is ~710 days. -- For 15 traffic groups, the interval is ~331 days.
Symptoms: When using a fast L4 profile with ePVA full acceleration configured, the 5-second TCP 3WHS handshake timeout is not being updated to the TCP idle timeout after the handshake is completed. The symptom is an unusually high number of connections getting reset in a short period of time.
Conditions: The default number of connections per second before activating syncookie mode is 1993. This value can be increased to a max of 4093. After this threshold is reached, then syncookie mode is activated. This is an insufficient maximum for wildcard virtuals, since they can have 30k+ connections per second. 2b1af7f3a8