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Posted to commits@nuttx.apache.org by GitBox <gi...@apache.org> on 2020/05/28 14:52:58 UTC
[GitHub] [incubator-nuttx] xiaoxiang781216 opened a new issue #1144: Crtical section should be replaced with semaphore or spinlock as much as we can to improve SMP performance
xiaoxiang781216 opened a new issue #1144:
URL: https://github.com/apache/incubator-nuttx/issues/1144
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[GitHub] [incubator-nuttx] xiaoxiang781216 commented on issue #1144: Crtical section should be replaced with semaphore or spinlock as much as we can to improve SMP performance
Posted by GitBox <gi...@apache.org>.
xiaoxiang781216 commented on issue #1144:
URL: https://github.com/apache/incubator-nuttx/issues/1144#issuecomment-721553181
related issue: https://github.com/apache/incubator-nuttx/issues/2213
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[GitHub] [incubator-nuttx] xiaoxiang781216 commented on issue #1144: Crtical section should be replaced with semaphore or spinlock as much as we can to improve SMP performance
Posted by GitBox <gi...@apache.org>.
xiaoxiang781216 commented on issue #1144:
URL: https://github.com/apache/incubator-nuttx/issues/1144#issuecomment-807159902
Once special case: replace the critical section with the spin lock if the caller doesn't sleep inside it, because:
1. Can't wait inside the spinlock
2. Can wait inside the critical section
To support the wait, the critical section has much more complex logic than spinlock. All code which don't require sleep is better to switch to spinlock.
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