Add infrastructure to compute timed averages

This series adds a new module that can be used to compute the average of a set of values in a certain period of time. This will be used by the accounting code to obtain statistics such as the min / max / average latency of I/O commands.

This is based on Benoît's code, originally written last year.

Regards,

Berto

Alberto Garcia (3):
timer: Move NANOSECONDS_PER_SECONDS to timer.h
timer: Use a single definition of NSEC_PER_SEC for the whole codebase
util: Infrastructure for computing recent averages

 hw/ppc/ppc.c                 |   2 -
 hw/ppc/spapr_rtc.c           |   3 +-
 hw/timer/mc146818rtc.c       |   1 -
 hw/usb/hcd-ehci.c            |   2 +-
 include/qemu/throttle.h      |   2 -
 include/qemu/timed-average.h |  58 ++++++++++++
 include/qemu/timer.h         |   2 +
 tests/Makefile               |   4 +
 tests/rtl8139-test.c         |  10 +--
 tests/test-throttle.c        |   8 +-
 tests/test-timed-average.c   |  89 ++++++++++++++++++
 tests/wdt_ib700-test.c       |  15 ++--
 util/Makefile.objs           |   1 +
 util/throttle.c              |   4 +-
 util/timed-average.c         | 208 +++++++++++++++++++++++++++++++++++++++++++
 15 files changed, 382 insertions(+), 27 deletions(-)
 create mode 100644 include/qemu/timed-average.h
 create mode 100644 tests/test-timed-average.c
 create mode 100644 util/timed-average.c

2.1.4