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1. You are trying to align each ref object to a cache line by padding the object to fill an entire cache line. However your refs vector is embedded as a member in the multiqueue class hence it will start at an offset relative to the beginning of the object which is probably either aligned on a 4 or 8 byte boundary. So your refs vector might start in the middle of a cache line and your padding to cache line size ill not gain you what you wanted.

Aligning a member within a class to a cacheline seems to be a non trivial exercise. This question on SO might be helpful.

1. Your code is really hard to understand from just reading mostly due to not very helpful names for parameters to the class. It's not very obvious what the inthread, outthread, unblockconsumer and unblockproducer parameters mean and in how far they relate to the workings of the queue. I assume inthread is numberOfProducers and outthread is numberOfConsumers - the others are bit more convoluted. Adding some documentation comments would help.

1. You are trying to align each ref object to a cache line by padding the object to fill an entire cache line. However your refs vector is embedded as a member in the multiqueue class hence it will start at an offset relative to the beginning of the object which is probably either aligned on a 4 or 8 byte boundary. So your refs vector might start in the middle of a cache line and your padding to cache line size ill not gain you what you wanted.

   Aligning a member within a class to a cacheline seems to be a non trivial exercise. This question on SO might be helpful.

2. Your code is really hard to understand from just reading mostly due to not very helpful names for parameters to the class. It's not very obvious what the inthread, outthread, unblockconsumer and unblockproducer parameters mean and in how far they relate to the workings of the queue. I assume inthread is numberOfProducers and outthread is numberOfConsumers - the others are bit more convoluted. Adding some documentation comments would help.

1. You are trying to align each ref object to a cache line by padding the object to fill an entire cache line. However your refs vector is embedded as a member in the multiqueue class hence it will start at an offset relative to the beginning of the object which is probably either aligned on a 4 or 8 byte boundary. So your refs vector might start in the middle of a cache line and your padding to cache line size ill not gain you what you wanted.

Aligning a member within a class to a cacheline seems to be a non trivial exercise. This question on SO might be helpful.

1. Your code is really hard to understand from just reading mostly due to not very helpful names for parameters to the class. It's not very obvious what the inthread, outthread, unblockconsumer and unblockproducer parameters mean and in how far they relate to the workings of the queue. I assume inthread is numberOfProducers and outthread is numberOfConsumers - the others are bit more convoluted. Adding some documentation comments would help.

1. You are trying to align each ref object to a cache line by padding the object to fill an entire cache line. However your refs vector is embedded as a member in the multiqueue class hence it will start at an offset relative to the beginning of the object which is probably either aligned on a 4 or 8 byte boundary. So your refs vector might start in the middle of a cache line and your padding to cache line size ill not gain you what you wanted.

Aligning a member within a class to a cacheline seems to be a non trivial exercise. This question on SO might be helpful.

1. Your code is really hard to understand from just reading mostly due to not very helpful names for parameters to the class. It's not very obvious what the inthread, outthread, unblockconsumer and unblockproducer parameters mean and in how far they relate to the workings of the queue. I assume inthread is numberOfProducers and outthread is numberOfConsumers - the others are bit more convoluted. Adding some documentation comments would help.

1. You are trying to align each ref object to a cache line by padding the object to fill an entire cache line. However your refs vector is embedded as a member in the multiqueue class hence it will start at an offset relative to the beginning of the object which is probably either aligned on a 4 or 8 byte boundary. So your refs vector might start in the middle of a cache line and your padding to cache line size ill not gain you what you wanted.

Aligning a member within a class to a cacheline seems to be a non trivial exercise. This question on SO might be helpful.

1. Your code is really hard to understand from just reading mostly due to not very helpful names for parameters to the class. It's not very obvious what the inthread, outthread, unblockconsumer and unblockproducer parameters mean and in how far they relate to the workings of the queue. I assume inthread is numberOfProducers and outthread is numberOfProducers the others are bit more convoluted. Adding some documentation comments would help.

1. You are trying to align each ref object to a cache line by padding the object to fill an entire cache line. However your refs vector is embedded as a member in the multiqueue class hence it will start at an offset relative to the beginning of the object which is probably either aligned on a 4 or 8 byte boundary. So your refs vector might start in the middle of a cache line and your padding to cache line size ill not gain you what you wanted.

Aligning a member within a class to a cacheline seems to be a non trivial exercise. This question on SO might be helpful.

1. Your code is really hard to understand from just reading mostly due to not very helpful names for parameters to the class. It's not very obvious what the inthread, outthread, unblockconsumer and unblockproducer parameters mean and in how far they relate to the workings of the queue. I assume inthread is numberOfProducers and outthread is numberOfConsumers - the others are bit more convoluted. Adding some documentation comments would help.