Synchronize gradients in manual optimization with DDPStrategy(static_graph=True)#21251

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Sohaib-Ahmed21 wants to merge 7 commits intoLightning-AI:masterfrom

Sohaib-Ahmed21:bugfix/18086_ddp_manual_opt_grad_sync

Commits on Sep 28, 2025

fix: synchronize gradients in manual optimization with DDPStrategy(static_graph=True). Ensure gradients are reduced correctly when using manual optimization and DDP with static_graph enabled.
Sohaib-Ahmed21
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Adds regression test to cover all combinations of optimization/static_graph.
Sohaib-Ahmed21
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Initialize _pl_static_graph_delay_done attribute properly
Sohaib-Ahmed21
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Commits on Sep 29, 2025

Merge branch 'master' into bugfix/18086_ddp_manual_opt_grad_sync
Sohaib-Ahmed21
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Commits on Sep 30, 2025

Merge branch 'master' into bugfix/18086_ddp_manual_opt_grad_sync
Sohaib-Ahmed21
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Commits on Oct 4, 2025

Merge branch 'master' into bugfix/18086_ddp_manual_opt_grad_sync
Sohaib-Ahmed21
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Commits on Oct 5, 2025

Merge branch 'master' into bugfix/18086_ddp_manual_opt_grad_sync
Sohaib-Ahmed21
authored