SetupParameters

Passed in for io_uring_setup(2). Copied back with updated info on success.

C API: struct io_uring_params

version(linux) @nogc

struct SetupParameters {

enum ulong SUBMISSION_QUEUE_RING_OFFSET;

enum ulong COMPLETION_QUEUE_RING_OFFSET;

enum ulong SUBMISSION_QUEUE_ENTRIES_OFFSET;

uint sq_entries;

uint cq_entries;

SetupFlags flags;

uint sq_thread_cpu;

uint sq_thread_idle;

SetupFeatures features;

SubmissionQueueRingOffsets sq_off;

CompletionQueueRingOffsets cq_off;

}

Members

Variables

COMPLETION_QUEUE_RING_OFFSET enum ulong COMPLETION_QUEUE_RING_OFFSET;: IORING_OFF_CQ_RING: mmap offset for completion queue ring
SUBMISSION_QUEUE_ENTRIES_OFFSET enum ulong SUBMISSION_QUEUE_ENTRIES_OFFSET;: IORING_OFF_SQES: mmap offset for submission entries
SUBMISSION_QUEUE_RING_OFFSET enum ulong SUBMISSION_QUEUE_RING_OFFSET;: IORING_OFF_SQ_RING: mmap offset for submission queue ring
cq_entries uint cq_entries;: (output) allocated entries in completion queue
cq_off CompletionQueueRingOffsets cq_off;: (output) completion queue ring data field offsets
features SetupFeatures features;: (from Linux 5.4)
flags SetupFlags flags;: (input)
sq_entries uint sq_entries;: (output) allocated entries in submission queue (both ring index array and separate entry array at SUBMISSION_QUEUE_ENTRIES_OFFSET).
sq_off SubmissionQueueRingOffsets sq_off;: (output) submission queue ring data field offsets
sq_thread_cpu uint sq_thread_cpu;: (input) used if SQ_AFF and SQPOLL flags are active to pin poll thread to specific cpu. right now always checked in kernel for "possible cpu".
sq_thread_idle uint sq_thread_idle;: (input) used if SQPOLL flag is active; timeout in milliseconds until kernel poll thread goes to sleep.

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