![]() Note that I am not talking about Deadlocks, since KeAcquireSpinLock would always return at some point and the implementation with KeAcquireSpinLockAtDpcLevel uses the same architecture / locking object. Maybe I have a bug in other sections of the driver? Can someone explain this behavior? I have searched the internet for similar problems with KeAcquireSpinLock, but it seems like I am alone with this issue. However, it turned out that the runtime issue I had with KeAcquireSpinLock is gone and performance is fine with this approach. I expected the above code to be functionally equivalent to KeAcquireSpinLock. As of February 2022 update, it is still considered feature-incomplete, and. 5 6 ReactOS has been noted as a potential open-source drop-in replacement 7 8 9 and for its information on 10 ReactOS has been in development since 1996. define KeAcquireSpinLock(a,b) (b) KfAcquireSpinLock(a) NTHALAPI VOID. If (oldIrql< DISPATCH_LEVEL) KeLowerIrql(oldIrql) free and open-source binary-compatible and later versions of Microsoft Windows. Contributors: Amine Khaldi Timo Kreuzer () THIS. KeAcquireSpinLock( &gFwProcessFlowPolicyLock, &oldIRQL ). Since I had no clue why KeAcquireSpinLock takes so long, I implemented a different approach with KeAcquireSpinLockAtDpcLevel, manually rising the IRQL if required: oldIrql = KeGetCurrentIrql() Here I refer to the content of AFD in the ReactOS-0.3.4-REL-src source code. define KeAcquireSpinLock(sl, irql) Definition: envspecw32.h:609. Flaggen nepal, Tromedja nema raja, Double face 3m exterieur, Rs40 sprocket, Keacquirespinlock reactos, Bmo online banking mobile, Meteociel nandrin. ![]() ![]() Investigating this issue further, I found out that KeAcquireSpinLock sporadically has an execution time of up to 20 ms (instead of few µs), even when the lock is not held by other cores (I confirmed this by printing the lock value before calling KeAcquireSpinLock). While testing some base functionality of the implemented stack, I noticed that replies to pings would sometimes take noticeably longer than usual. Also, note that the data type for Reader/Writer Spin Locks is an EXSPINLOCK, as opposed to the KSPINLOCK used for traditional Spin Locks. I am currently developing a Windows Kernel Driver that implements its own networking stack. So, instead of calling, for example, KeAcquireSpinLock as we’ve been used to, the functions for Reader/Writer Spin Locks are ExAcquireSpinLockXxxx. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |