On Fri, Jan 28, 2022 at 05:36:16PM +0900, Hiroki Narukawa wrote: > Coroutine pool size was 64 from long ago, and the basis was organized in the > commit message in c740ad92. > > At that time, virtio-blk queue-size and num-queue were not configuable, and > equivalent values were 128 and 1. > > Coroutine pool size 64 was fine then. > > Later queue-size and num-queue got configuable, and default values were > increased. > > Coroutine pool with size 64 exhausts frequently with random disk IO in new > size, and slows down. > > This commit adjusts coroutine pool size adaptively with new values. > > This commit adds 64 by default, but now coroutine is not only for block > devices, > > and is not too much burdon comparing with new default. > > pool size of 128 * vCPUs. > > Signed-off-by: Hiroki Narukawa <hnaru...@yahoo-corp.jp> > --- > hw/block/virtio-blk.c | 5 +++++ > include/qemu/coroutine.h | 10 ++++++++++ > util/qemu-coroutine.c | 20 ++++++++++++++++---- > 3 files changed, 31 insertions(+), 4 deletions(-)
Thanks, applied to my block tree: https://gitlab.com/stefanha/qemu/commits/block Stefan
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