[pull] master from tensorflow:master#629
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pull[bot] merged 14 commits intoFage2016:masterfrom Sep 23, 2025
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PiperOrigin-RevId: 810481233
PiperOrigin-RevId: 810486071
PiperOrigin-RevId: 810517031
PiperOrigin-RevId: 810517192
PiperOrigin-RevId: 810519625
PiperOrigin-RevId: 810522807
PiperOrigin-RevId: 810523749
Recall that when a task in a multi-controller JAX (mcjax) job starts, it is
given a randomly generated incarnation id. If the task fails and restarts, it
gets a new id. These incarnation ids help us distinguish two different
instances of the same task.
When a group of tasks wants to perform a collective (e.g., AllReduce), every
participate needs to agree on the set of participants. If task 0 thinks the
collective is with tasks {0, 1, 2} while task 1 thinks the collective is with
tasks {0, 1, 3}, the program will not execute smoothly.
The participants also need to agree on everyone's incarnations. For example, if
task 0 thinks task 2 has incarnation 42 while task 1 thinks task 2 has
incarnation 100, they will disagree on whether task 2 has failed or not.
Tasks get the set of participants and their incarnations from calls to
`live_devices`. `live_devices` runs a barrier across tasks and returns the set
of currently alive processes along with their incarnations. This CL pipes this
information through the C API, so that open source clients can use the
information. Concretely, the incarnations of every task are passed to an
executable when it is run.
PiperOrigin-RevId: 810549686
PiperOrigin-RevId: 810553684
This dependency is not needed but in the way for ROCm builds because it requires CUDA headers. PiperOrigin-RevId: 810561869
We extend the autotuner to the scaled-dot case. The autotuner has a very restrictive set of config for the scaled dot due to the issues of the scaled-dot -> regular dot AccelerateMatmul rewriter of Triton. The numerics is correct for the config that actually works but requires a transpose for the rhs scales. For some reason the scales should have mk and nk shapes. PiperOrigin-RevId: 810568117
The error: ``` ERROR: .../tensorflow/python/BUILD:1528:15: Mandatory attribute 'actual' resolved to 'None' after evaluating 'select' expression ``` Reverts e1ca152 PiperOrigin-RevId: 810568791
Migrate away from older types. PiperOrigin-RevId: 810574017
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