Changeset 06f81c4 in mainline for kernel/generic/include

Timestamp:

2023-04-16T13:00:39Z (2 years ago)

Author:

Jiří Zárevúcky <zarevucky.jiri@…>

Branches:

master, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

d8581611, f3dbe27

Parents:

fbaf6ac

git-author:

Jiří Zárevúcky <zarevucky.jiri@…> (2023-03-28 16:21:30)

git-committer:

Jiří Zárevúcky <zarevucky.jiri@…> (2023-04-16 13:00:39)

Message:

Check cpu_t::fpu_owner directly instead of thread_t::fpu_context_engaged

This results in net reduction in locking.

Location:

kernel/generic/include

Files:

• cpu.h (modified) (1 diff)
• proc/thread.h (modified) (1 diff)

kernel/generic/include/cpu.h

@@ -97 +97 @@
         cpu_arch_t arch;
 
+#ifdef CONFIG_FPU_LAZY
         IRQ_SPINLOCK_DECLARE(fpu_lock);
         struct thread *fpu_owner;
+#endif
 
         /**

kernel/generic/include/proc/thread.h

@@ -132 +132 @@
         bool fpu_context_exists;
 
-        /*
-         * Defined only if thread doesn't run.
-         * It means that fpu context is in CPU that last time executes this
-         * thread. This disables migration.
-         */
-        bool fpu_context_engaged;
-
         /* The thread will not be migrated if nomigrate is non-zero. */
         unsigned int nomigrate;