Update Unit of Bandwidth metrics to Gbps (#96)
* Add Utilization to metric name for Bandwidth related metrics whose Unit
is Percent
* Update Unit of Bandwidth metrics to Gbps
* Update metric Formula to use total duration as denominator instead of normalization unit.
* Update metric Description
* Update metric Unit
* Update CHANGELOG
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@@ -397,13 +397,13 @@ LDS Speed-of-Light:
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over the number of LDS cycles that would have been required to move the same
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amount of data in an uncontended access. [#lds-bank-conflict]_
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unit: Percent
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Theoretical Bandwidth:
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Theoretical Bandwidth Utilization:
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rst: Indicates the maximum amount of bytes that could have been loaded from, stored
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to, or atomically updated in the LDS per :ref:`normalization unit <normalization-units>`.
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to, or atomically updated in the LDS divided as percentage of theoretical peak.
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Does *not* take into account the execution mask of the wavefront when the instruction
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was executed. See the :ref:`LDS bandwidth example <lds-bandwidth>` for more
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detail.
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unit: Bytes per normalization unit
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unit: Percent
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Utilization:
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rst: Indicates what percent of the kernel's duration the :ref:`LDS <desc-lds>` was
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actively executing instructions (including, but not limited to, load, store,
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@@ -450,17 +450,16 @@ LDS Statistics:
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unit: Accesses per normalization unit
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Theoretical Bandwidth:
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rst: Indicates the maximum amount of bytes that could have been loaded from, stored
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to, or atomically updated in the LDS per :ref:`normalization unit <normalization-units>`.
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Does *not* take into account the execution mask of the wavefront when the instruction
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was executed. See the :ref:`LDS bandwidth example <lds-bandwidth>` for more
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detail.
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unit: Bytes per normalization unit
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to, or atomically updated in the LDS divided by total duration. Does *not* take
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into account the execution mask of the wavefront when the instruction was executed.
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See the :ref:`LDS bandwidth example <lds-bandwidth>` for more detail.
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unit: Gbps
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Unaligned Stall:
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rst: The total number of cycles spent in the :ref:`LDS scheduler <desc-lds>` due
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to stalls from non-dword aligned addresses per :ref:`normalization unit <normalization-units>`.
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unit: Cycles per normalization unit
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vL1D Speed-of-Light:
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Bandwidth:
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Bandwidth Utilization:
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rst: The number of bytes looked up in the vL1D cache as a result of :ref:`VMEM
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<desc-vmem>` instructions, as a percent of the peak theoretical bandwidth achievable
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on the specific accelerator. The number of bytes is calculated as the number
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@@ -614,13 +613,13 @@ vL1D cache access metrics:
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rst: The total number of cache line lookups in the vL1D.
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unit: Cache lines
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Cache BW:
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rst: The number of bytes looked up in the vL1D cache as a result of :ref:`VMEM
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<desc-vmem>` instructions per :ref:`normalization unit <normalization-units>`. The
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number of bytes is calculated as the number of cache lines requested multiplied
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by the cache line size. This value does not consider partial requests, so
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for instance, if only a single value is requested in a cache line, the data movement
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will still be counted as a full cache line.
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unit: Bytes per normalization unit
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rst: The number of bytes looked up in the vL1D cache as a result of :ref:`VMEM
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<desc-vmem>` instructions divided by total duration. The number of bytes is
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calculated as the number of cache lines requested multiplied by the cache line
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size. This value does not consider partial requests, so for instance, if only
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a single value is requested in a cache line, the data movement will still be
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counted as a full cache line.
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unit: Gbps
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Cache Hit Rate:
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rst: The ratio of the number of vL1D cache line requests that hit in vL1D cache
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over the total number of cache line requests to the :ref:`vL1D Cache RAM <desc-tc>`.
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@@ -646,12 +645,12 @@ vL1D cache access metrics:
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unit: Requests per normalization unit
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L1-L2 BW:
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rst: The number of bytes transferred across the vL1D-L2 interface as a result of
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:ref:`VMEM <desc-vmem>` instructions, per :ref:`normalization unit <normalization-units>`.
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The number of bytes is calculated as the number of cache lines requested multiplied
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by the cache line size. This value does not consider partial requests, so for instance,
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:ref:`VMEM <desc-vmem>` instructions, divided by total duration. The number
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of bytes is calculated as the number of cache lines requested multiplied by
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the cache line size. This value does not consider partial requests, so for instance,
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if only a single value is requested in a cache line, the data movement will
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still be counted as a full cache line.
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unit: Bytes per normalization unit
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unit: Gbps
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L1-L2 Read:
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rst: The number of read requests for a vL1D cache line that were not satisfied by
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the vL1D and must be retrieved from the to the :doc:`L2 Cache <l2-cache>` per :ref:`normalization
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@@ -761,20 +760,20 @@ L2 Speed-of-Light:
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unit: Percent
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L2 cache accesses:
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Atomic Bandwidth:
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rst: Total number of bytes looked up in the L2 cache for atomic requests, per
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:ref:`normalization unit <normalization-units>`.
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unit: Bytes per normalization unit
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rst: Total number of bytes looked up in the L2 cache for atomic requests, divided
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by total duration.
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unit: Gbps
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Atomic Req:
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rst: The total number of atomic requests (with and without return) to the L2 from
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all clients.
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unit: Requests per normalization unit
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Bandwidth:
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rst: The number of bytes looked up in the L2 cache, per :ref:`normalization unit
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<normalization-units>`. The number of bytes is calculated as the number of
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cache lines requested multiplied by the cache line size. This value does not
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consider partial requests, so for example, if only a single value is requested
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in a cache line, the data movement will still be counted as a full cache line.
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unit: Bytes per normalization unit
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rst: The number of bytes looked up in the L2 cache, divided by total duration.
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The number of bytes is calculated as the number of cache lines requested multiplied
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by the cache line size. This value does not consider partial requests, so for
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example, if only a single value is requested in a cache line, the data movement will
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still be counted as a full cache line.
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unit: Gbps
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CC Req:
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rst: The total number of requests to the L2 that go to Coherently Cacheable (CC) memory
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allocations. See the :ref:`memory-type` for more information.
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@@ -818,9 +817,9 @@ L2 cache accesses:
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allocations. See the :ref:`memory-type` for more information.
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unit: Requests per normalization unit
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Read Bandwidth:
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rst: Total number of bytes looked up in the L2 cache for read requests, per :ref:`normalization
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unit <normalization-units>`.
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unit: Bytes per normalization unit
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rst: Total number of bytes looked up in the L2 cache for read requests, divided
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by total duration.
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unit: Gbps
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Read Req:
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rst: 'The total number of read requests to the L2 from all clients. '
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unit: Requests per normalization unit
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@@ -841,9 +840,9 @@ L2 cache accesses:
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See the :ref:`memory-type` for more information.
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unit: Requests per normalization unit
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Write Bandwidth:
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rst: Total number of bytes looked up in the L2 cache for write requests, per :ref:`normalization
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unit <normalization-units>`.
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unit: Bytes per normalization unit
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rst: Total number of bytes looked up in the L2 cache for write requests, divided
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by total duration.
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unit: Gbps
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Write Req:
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rst: The total number of write requests to the L2 from all clients.
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unit: Requests per normalization unit
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@@ -896,9 +895,9 @@ L2-Fabric interface metrics:
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memory <memory-type>` allocations.
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unit: Percent
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Read BW:
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rst: The total number of bytes read by the L2 cache from Infinity Fabric per :ref:`normalization
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unit <normalization-units>`.
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unit: Bytes per normalization unit
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rst: The total number of bytes read by the L2 cache from Infinity Fabric divided
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by total duration.
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unit: Gbps
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Read Latency:
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rst: The time-averaged number of cycles read requests spent in Infinity Fabric before
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data was returned to the L2.
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@@ -954,12 +953,12 @@ L2-Fabric interface metrics:
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unit: Percent
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Write and Atomic BW:
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rst: The total number of bytes written by the L2 over Infinity Fabric by write and
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atomic operations per :ref:`normalization unit <normalization-units>`. Note
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that on current CDNA accelerators, such as the :ref:`MI2XX <mixxx-note>`, requests
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are only considered *atomic* by Infinity Fabric if they are targeted at non-write-cacheable
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memory, for example, :ref:`fine-grained memory <memory-type>` allocations or :ref:`uncached
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atomic operations divided by total duration. Note that on current CDNA accelerators,
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such as the :ref:`MI2XX <mixxx-note>`, requests are only considered *atomic*
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by Infinity Fabric if they are targeted at non-write-cacheable memory, for
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example, :ref:`fine-grained memory <memory-type>` allocations or :ref:`uncached
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memory <memory-type>` allocations on the MI2XX.
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unit: Bytes per normalization unit
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unit: Gbps
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Write and Atomic Latency:
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rst: The time-averaged number of cycles write requests spent in Infinity Fabric
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before a completion acknowledgement was returned to the L2.
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@@ -975,17 +974,17 @@ L2 - Fabric interface detailed metrics:
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memory <memory-type>` allocations on the MI2XX.
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unit: Requests per normalization unit
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Atomic Bandwidth - HBM:
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rst: Total number of bytes due to L2 atomic requests due to HBM traffic, per normalization
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unit.
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unit: Bytes per normalization unit
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rst: Total number of bytes due to L2 atomic requests due to HBM traffic, divided
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by total duration.
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unit: Gbps
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"Atomic Bandwidth - Infinity Fabric\u2122":
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rst: Total number of bytes due to L2 atomic requests due to Infinity Fabric traffic,
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per normalization unit.
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unit: Bytes per normalization unit
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divided by total duration.
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unit: Gbps
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Atomic Bandwidth - PCIe:
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rst: Total number of bytes due to L2 atomic requests due to PCIe traffic, per
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normalization unit.
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unit: Bytes per normalization unit
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rst: Total number of bytes due to L2 atomic requests due to PCIe traffic, divided
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by total duration.
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unit: Gbps
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HBM Read:
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rst: The total number of L2 requests to Infinity Fabric to read 32B or 64B of data
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from the accelerator's local HBM, per :ref:`normalization unit <normalization-units>`.
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@@ -1013,17 +1012,17 @@ L2 - Fabric interface detailed metrics:
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uncached data requests. See :ref:`l2-request-flow` for more detail.
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unit: Requests per normalization unit
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Read Bandwidth - HBM:
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rst: Total number of bytes due to L2 read requests due to HBM traffic, per normalization
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unit.
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unit: Bytes per normalization unit
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rst: Total number of bytes due to L2 read requests due to HBM traffic, divided
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by total duration.
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unit: Gbps
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"Read Bandwidth - Infinity Fabric\u2122":
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rst: Total number of bytes due to L2 read requests due to Infinity Fabric traffic,
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per normalization unit.
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unit: Bytes per normalization unit
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divided by total duration.
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unit: Gbps
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Read Bandwidth - PCIe:
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rst: Total number of bytes due to L2 read requests due to PCIe traffic, per normalization
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unit.
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unit: Bytes per normalization unit
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rst: Total number of bytes due to L2 read requests due to PCIe traffic, divided
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by total duration.
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unit: Gbps
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Remote Read:
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rst: The total number of L2 requests to Infinity Fabric to read 32B or 64B of data
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from any source other than the accelerator's local HBM, per :ref:`normalization
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@@ -1036,17 +1035,17 @@ L2 - Fabric interface detailed metrics:
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for more detail.
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unit: Requests per normalization unit
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Write Bandwidth - HBM:
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rst: Total number of bytes due to L2 write requests due to HBM traffic, per normalization
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unit.
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unit: Bytes per normalization unit
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rst: Total number of bytes due to L2 write requests due to HBM traffic, divided
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by total duration.
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unit: Gbps
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"Write Bandwidth - Infinity Fabric\u2122":
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rst: Total number of bytes due to L2 write requests due to Infinity Fabric traffic,
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per normalization unit.
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unit: Bytes per normalization unit
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divided by total duration.
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unit: Gbps
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Write Bandwidth - PCIe:
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rst: Total number of bytes due to L2 write requests due to PCIe traffic, per normalization
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unit.
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unit: Bytes per normalization unit
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rst: Total number of bytes due to L2 write requests due to PCIe traffic, divided
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by total duration.
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unit: Gbps
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Write and Atomic (32B):
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rst: The total number of L2 requests to Infinity Fabric to write or atomically update
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32B of data to any memory location, per :ref:`normalization unit <normalization-units>`.
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@@ -1098,7 +1097,7 @@ L2 - Fabric Interface stalls:
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of the :ref:`total active L2 cycles <total-active-l2-cycles>`.
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unit: Percent
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Scalar L1D Speed-of-Light:
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Bandwidth:
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Bandwidth Utilization:
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rst: The number of bytes looked up in the sL1D cache, as a percent of the peak theoretical
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bandwidth. Calculated as the ratio of sL1D requests over the :ref:`total sL1D
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cycles <total-sl1d-cycles>`.
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@@ -1108,13 +1107,11 @@ Scalar L1D Speed-of-Light:
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the cache. The ratio of the number of sL1D requests that hit [#sl1d-cache]_
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over the number of all sL1D requests.
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unit: Percent
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sL1D-L2 BW:
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rst: "The total number of bytes read from, written to, or atomically updated \
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\ across the sL1D\u2194:doc:`L2 <l2-cache>` interface, per :ref:`normalization\
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\ unit <normalization-units>`. Note that sL1D writes and atomics are typically\
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\ unused on current CDNA accelerators, so in the majority of cases this can\
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\ be interpreted as an sL1D\u2192L2 read bandwidth."
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unit: Bytes per normalization unit
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sL1D-L2 BW Utilization:
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rst: The percentage of the peak theoretical sL1D - L2 interface bandwidth acheived.\
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\ Caclulated as total number of bytes read from, written to, or atomically updated\
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\ across the sL1D - L2 interface.
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unit: Percent
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Scalar L1D cache accesses:
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Atomic Req:
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rst: The total number of atomic requests from sL1D to the :doc:`L2 <l2-cache>`,
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@@ -1189,13 +1186,13 @@ Scalar L1D Cache - L2 Interface:
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unit: Requests per normalization unit
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sL1D-L2 BW:
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rst: "The total number of bytes read from, written to, or atomically updated \
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\ across the sL1D\u2194:doc:`L2 <l2-cache>` interface, per :ref:`normalization\
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\ unit <normalization-units>`. Note that sL1D writes and atomics are typically\
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\ unused on current CDNA accelerators, so in the majority of cases this can\
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\ be interpreted as an sL1D\u2192L2 read bandwidth."
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unit: Bytes per normalization unit
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\ across the sL1D\u2194:doc:`L2 <l2-cache>` interface, divided by total duration.\
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\ Note that sL1D writes and atomics are typically unused on current CDNA accelerators,\
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\ so in the majority of cases this can be interpreted as an sL1D\u2192L2 read\
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\ bandwidth."
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unit: Gbps
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L1I Speed-of-Light:
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Bandwidth:
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Bandwidth Utilization:
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rst: The number of bytes looked up in the L1I cache, as a percent of the peak theoretical
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bandwidth. Calculated as the ratio of L1I requests over the :ref:`total L1I
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cycles <total-l1i-cycles>`.
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@@ -1205,7 +1202,7 @@ L1I Speed-of-Light:
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the cache. Calculated as the ratio of the number of L1I requests that hit over
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the number of all L1I requests.
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unit: Percent
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L1I-L2 Bandwidth:
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L1I-L2 Bandwidth Utilization:
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rst: "The percent of the peak theoretical L1I \u2192 L2 cache request bandwidth\
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\ achieved. Calculated as the ratio of the total number of requests from the\
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\ L1I to the L2 cache over the :ref:`total L1I-L2 interface cycles <total-l1i-cycles>`."
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@@ -1238,10 +1235,9 @@ L1I cache accesses:
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unit: Requests per normalization unit
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L1I <-> L2 interface:
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L1I-L2 Bandwidth:
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rst: "The percent of the peak theoretical L1I \u2192 L2 cache request bandwidth\
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\ achieved. Calculated as the ratio of the total number of requests from the\
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\ L1I to the L2 cache over the :ref:`total L1I-L2 interface cycles <total-l1i-cycles>`."
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unit: Percent
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rst: Total number of bytes transferred across L1I - L2 interface divided by total
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duration.
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unit: Gbps
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Workgroup manager utilizations:
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Accelerator Utilization:
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rst: The percent of cycles in the kernel where the accelerator was actively doing
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