From 1793ad0247cad35db1ebbc04fbea0446c30a27ca Mon Sep 17 00:00:00 2001 From: Stefano Garzarella Date: Wed, 21 Jul 2021 11:42:10 +0200 Subject: iothread: add aio-max-batch parameter The `aio-max-batch` parameter will be propagated to AIO engines and it will be used to control the maximum number of queued requests. When there are in queue a number of requests equal to `aio-max-batch`, the engine invokes the system call to forward the requests to the kernel. This parameter allows us to control the maximum batch size to reduce the latency that requests might accumulate while queued in the AIO engine queue. If `aio-max-batch` is equal to 0 (default value), the AIO engine will use its default maximum batch size value. Signed-off-by: Stefano Garzarella Message-id: 20210721094211.69853-3-sgarzare@redhat.com Signed-off-by: Stefan Hajnoczi --- util/aio-win32.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'util/aio-win32.c') diff --git a/util/aio-win32.c b/util/aio-win32.c index 168717b51b..d5b09a1193 100644 --- a/util/aio-win32.c +++ b/util/aio-win32.c @@ -440,3 +440,8 @@ void aio_context_set_poll_params(AioContext *ctx, int64_t max_ns, error_setg(errp, "AioContext polling is not implemented on Windows"); } } + +void aio_context_set_aio_params(AioContext *ctx, int64_t max_batch, + Error **errp) +{ +} -- cgit 1.4.1