This patchset implement continous leaky bucket throttling. It use two requests queue to enable to do silly unbalanced throttling like block_set_io_throttle 0 0 0 0 6000 1
It use two timer to get the timer callbacks and the throttle.c code simple It add unit tests. It fail with the following error message at exit and I don't know why yet. qemu-system-x86_64: block.c:1489: bdrv_drain_all: Assertion `((&bs->tracked_requests)->lh_first == ((void *)0))' failed. The throttling core is pretty solid and the surrouding of the patchset needs polish. (new options ...) since previous version: wrap qemu-option.hx declararation [Eric] continuus -> continuous [Fam] unit test [Paolo] Benoît Canet (5): throttle: Add a new throttling API implementing continuous leaky bucket. throttle: Add units tests block: Enable the new throttling code in the block layer. block: Add support for throttling burst max in QMP and the command line. block: Add iops_sector_count to do the iops accounting for a given io size. block.c | 351 ++++++++++---------------------- block/qapi.c | 50 +++-- blockdev.c | 207 ++++++++++++++----- hmp.c | 36 +++- include/block/block.h | 1 - include/block/block_int.h | 32 +-- include/qemu/throttle.h | 105 ++++++++++ qapi-schema.json | 40 +++- qemu-options.hx | 4 +- qmp-commands.hx | 34 +++- tests/Makefile | 2 + tests/test-throttle.c | 494 +++++++++++++++++++++++++++++++++++++++++++++ util/Makefile.objs | 1 + util/throttle.c | 391 +++++++++++++++++++++++++++++++++++ 14 files changed, 1405 insertions(+), 343 deletions(-) create mode 100644 include/qemu/throttle.h create mode 100644 tests/test-throttle.c create mode 100644 util/throttle.c -- 1.7.10.4