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Disable an io interrupt when more than 99% are unhandled. This somewhat prevents random freezing.

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git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23219 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Marcus Overhagen 2008-01-02 17:33:27 +00:00
parent 68af0a3fff
commit 971cf1881e
1 changed files with 19 additions and 2 deletions
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21
src/system/kernel/int.c
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@ -43,6 +43,8 @@ struct io_vector {
#ifdef DEBUG_INT
int64 handled_count;
int64 unhandled_count;
int trigger_count;
int ignored_count;
#endif
};
@ -125,6 +127,8 @@ int_init_post_vm(kernel_args *args)
#ifdef DEBUG_INT
io_vectors[i].handled_count = 0;
io_vectors[i].unhandled_count = 0;
io_vectors[i].trigger_count = 0;
io_vectors[i].ignored_count = 0;
#endif
initque(&io_vectors[i].handler_list); /* initialize handler queue */
}
@ -283,10 +287,23 @@ int_io_interrupt_handler(int vector, bool levelTriggered)
}
#ifdef DEBUG_INT
if (status != B_UNHANDLED_INTERRUPT)
io_vectors[vector].trigger_count++;
if (status != B_UNHANDLED_INTERRUPT) {
io_vectors[vector].handled_count++;
else
} else {
io_vectors[vector].unhandled_count++;
io_vectors[vector].ignored_count++;
}
// disable interrupt when more than 99% are unhandled
if (io_vectors[vector].trigger_count > 100000) {
if (io_vectors[vector].ignored_count > 99000) {
io_vectors[vector].enable_count = -100;
arch_int_disable_io_interrupt(vector);
dprintf("Disabling unhandled io interrupt %d\n", vector);
}
io_vectors[vector].trigger_count = 0;
io_vectors[vector].ignored_count = 0;
}
#endif
release_spinlock(&io_vectors[vector].vector_lock);