[Qemu-devel] [RFC V3 0/2] continuous leaky bucket throttling

["Benoît Canet" <benoit@irqsave.net>]

This patchset implement continous leaky bucket throttling.

It works mostly on the general case.
The exception is where the load is composed of both reads and writes and two
limits iops_rd and iops_wr are set.
The resulting iops are a little above half of the given limits.
I tried various strategies to avoid this: two timer, two throttled request
queues or even a different algorithm using a priority queue.
The problem is still the same in every version of the code: reads and writes
operation seems entangled.

Benoît Canet (2):
  throttle: Add a new throttling API implementing continuus leaky
    bucket.
  block: Enable the new throttling code in the block layer.

 block.c                   |  316 ++++++++------------------------
 block/qapi.c              |   21 +--
 blockdev.c                |  115 ++++++------
 include/block/block.h     |    1 -
 include/block/block_int.h |   33 +---
 include/qemu/throttle.h   |  111 ++++++++++++
 util/Makefile.objs        |    1 +
 util/throttle.c           |  436 +++++++++++++++++++++++++++++++++++++++++++++
 8 files changed, 698 insertions(+), 336 deletions(-)
 create mode 100644 include/qemu/throttle.h
 create mode 100644 util/throttle.c

-- 
1.7.10.4