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0230389593
The node blocks a certain amount of samples to use in its queues. Before this commit, the only moment to release them to the framwork was during ib_read()/ib_write(). But, there were a couple of problems. In the following I will take ib_read() as example, but ib_write() will be analogous. The first problem was: 1. If a QP disconnect, all Work Requests get invalidated and will be "flushed" to a Completion Queue. A possible solution would be, to save them in an intermediate buffer. We could then "exchange" these samples with the framework as soon as the node connects again and ib_read() is called again. So, we would get valid samples from the framwork, post them, and give the "invalidated" samples back. But, there is a second problem: 2. We cannot assume that ib_read() is ever called again after ib_disconnect(). This is for example the case if the disconnect is triggered by ib_stop() and not by an external node that disconnects. This would result in a memory leak, since the samples would never be returned to the framework, although the node is stopped. Because of this second problem, I decided to return all samples with sample_put() in the disconnect function. An additional benefit is that this is more convenient than another buffer to temporarily safe the invalidated samples. |
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| .. | ||
| amqp.c | ||
| cbuilder.c | ||
| CMakeLists.txt | ||
| comedi.c | ||
| file.c | ||
| iec61850.c | ||
| iec61850_sv.c | ||
| infiniband.c | ||
| influxdb.c | ||
| loopback.c | ||
| mqtt.c | ||
| nanomsg.c | ||
| ngsi.c | ||
| opal.c | ||
| shmem.c | ||
| signal_generator.c | ||
| socket.c | ||
| stats.c | ||
| test_rtt.c | ||
| websocket.c | ||
| zeromq.c | ||