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Shm: initial multiple segments support

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Alexey Rybalchenko
2020-08-25 21:04:02 +02:00
parent b126ede45a
commit 266843cda5
11 changed files with 159 additions and 124 deletions
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fairmq/shmem/README.md
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@@ -10,16 +10,16 @@ Devices track and cleanup shared memory on shutdown. For more information on the
FairMQ Shared Memory currently uses the following names to register shared memory on the system:
| name | info | created by | used by |
| ------------------------- | ---------------------------------------------- | ------------------ | ------------------------------ |
| `fmq_<shmId>_main` | main segment (user data) | one of the devices | devices |
| `fmq_<shmId>_mng` | management segment (management data) | one of the devices | devices |
| `fmq_<shmId>_mtx` | mutex | one of the devices | devices |
| `fmq_<shmId>_cv` | condition variable | one of the devices | devices with unmanaged regions |
| `fmq_<shmId>_rg_<index>` | unmanaged region(s) | one of the devices | devices with unmanaged regions |
| `fmq_<shmId>_rgq_<index>` | unmanaged region queue(s) | one of the devices | devices with unmanaged regions |
| `fmq_<shmId>_ms` | shmmonitor status | shmmonitor | devices, shmmonitor |
| `fmq_<shmId>_cq` | message queue between transport and shmmonitor | shmmonitor | devices, shmmonitor |
| name | info | created by | used by |
| --------------------------- | ---------------------------------------------- | ------------------ | ------------------------------ |
| `fmq_<shmId>_m_<segmentId>` | managed segment(s) (user data) | one of the devices | devices |
| `fmq_<shmId>_mng` | management segment (management data) | one of the devices | devices |
| `fmq_<shmId>_mtx` | mutex | one of the devices | devices |
| `fmq_<shmId>_cv` | condition variable | one of the devices | devices with unmanaged regions |
| `fmq_<shmId>_rg_<index>` | unmanaged region(s) | one of the devices | devices with unmanaged regions |
| `fmq_<shmId>_rgq_<index>` | unmanaged region queue(s) | one of the devices | devices with unmanaged regions |
| `fmq_<shmId>_ms` | shmmonitor status | shmmonitor | devices, shmmonitor |
| `fmq_<shmId>_cq` | message queue between transport and shmmonitor | shmmonitor | devices, shmmonitor |
The shmId is generated out of session id and user id.