What does an invalid address on the bus mean?
Unsourced material may be challenged and removed. In computing, a bus error is a fault raised by hardware, notifying an operating system (OS) that a process is trying to access memory that the CPU cannot physically address: an invalid address for the address bus, hence the name.
Which is an unaligned address on a bus?
For example, if multi-byte accesses must be 16 bit-aligned, addresses (given in bytes) at 0, 2, 4, 6, and so on would be considered aligned and therefore accessible, while addresses 1, 3, 5, and so on would be considered unaligned.
What does it mean to have a bus error?
In computing, a bus error is a fault raised by hardware, notifying an operating system (OS) that a process is trying to access memory that the CPU cannot physically address: an invalid address for the address bus, hence the name.
Can a bus error be a segmentation fault?
Trying to access an undefined virtual memory address is generally considered to be a segmentation fault rather than a bus error, though if the MMU is separate, the processor cannot tell the difference. Most CPUs are byte-addressable, where each unique memory address refers to an 8-bit byte.
Where do dead letter messages go in service bus?
Messages remain in the DLQ until you explicitly retrieve them from the DLQ and call Complete () on the dead-letter message. It’s not possible to obtain count of messages in the dead-letter queue at the topic level. That’s because messages don’t sit at the topic level unless Service Bus throws an internal error.
How many messages are in the service bus DLQ?
In the following example, Service Bus Explorer shows that there are 62 messages currently in the DLQ for the subscription “test1”. You can also get the count of DLQ messages by using Azure CLI command: az servicebus topic subscription show.
Why do messages not sit at topic level in service bus?
That’s because messages don’t sit at the topic level unless Service Bus throws an internal error. Instead, when a sender sends a message to a topic, the message is forwarded to subscriptions for the topic within milliseconds and thus no longer resides at the topic level.
Where is the termination resistor on a CAN bus?
There should be a 120-ohm termination resistor located at each end of the bus to prevent signal reflections. When you measure the resistance between CAN HI to CAN LOW on a wiring harness you should measure 60 ohms. This measurement should be conducted with the device power off.