tt_dispatch_prefetch_command_count
Name
Prometheus Metric Name
tt_dispatch_prefetch_command_count
Metric Path (tt-telemetry)
Schema:
{hostname}/tray{tray}/chip{chip}/cq{cq}/tt_dispatch_prefetch_command_count
Example path:
bh-glx-c09u02/tray1/chip2/cq0/tt_dispatch_prefetch_command_count
Description
The number of commands the prefetch core for this command queue (CQ) processed — that is, pulled from the host command queue and forwarded downstream — during the last telemetry collection interval. This is a throughput gauge for the front of the fast-dispatch pipeline (host → prefetch core → dispatch core → worker cores): how many dispatch commands are flowing in. It is a useful companion to tt_dispatch_program_count (the pipeline’s output rate) when reasoning about how efficiently incoming commands turn into launched programs.
This is a per-interval delta, not a monotonic total. The device-side counter is reset each time
telemetry is read, so each sample reports only the commands processed since the previous collection
cycle. Do not apply Prometheus rate()/increase() as you would to a cumulative counter.
A separate metric is emitted for every command queue the chip can support (cq0, cq1, …). CQs
absent from a given read, and chips whose firmware bundle is below version 19.12.0, report the
default value of 0.
Values
Type: Unsigned Integer
Units: None
Allowable values:
A non-negative integer count of commands processed in the last interval. For example, 1024 means
the prefetch core processed 1024 commands since the previous read.
Prometheus Labels
Label Name |
Value |
|---|---|
hostname |
The host from which the metric was collected. |
hall |
The datacenter hall where the host is located. Sourced from the Factory System Descriptor (FSD). |
aisle |
The datacenter aisle where the host is located. Sourced from the Factory System Descriptor (FSD). |
rack |
The rack number where the host is located. Sourced from the Factory System Descriptor (FSD). |
shelf_u |
The shelf U position in the rack where the host is located. Sourced from the Factory System Descriptor (FSD). |
tray |
The tray (UBB) that the device is located on. |
chip |
The ASIC location within the tray. |
cq |
The hardware command queue index ( |