Commit Graph

11 Commits

Author SHA1 Message Date
David Goulet
3d2d8d6841 sched: Extra careful in channel_outbuf_length()
In case we don't have a connection object in the channel, just be careful and
recover.

Signed-off-by: David Goulet <dgoulet@torproject.org>
2017-09-15 11:40:59 -04:00
David Goulet
14cd8bdd4b sched: Don't expose the global scheduler libevent object
Instead, add wrappers to do the needed action the different scheduler needs
with the libevent object.

Signed-off-by: David Goulet <dgoulet@torproject.org>
2017-09-15 11:40:59 -04:00
David Goulet
7cc9621d11 sched: Add Schedulers torrc option
This option is a list of possible scheduler type tor can use ordered by
priority. Its default value is "KIST,KISTLite,Vanilla" which means that KIST
will be used first and if unavailable will fallback to KISTLite and so on.

Signed-off-by: David Goulet <dgoulet@torproject.org>
2017-09-15 11:40:59 -04:00
Matt Traudt
6ff8c86ac6 sched: change most asserts to non-fatal BUGs 2017-09-15 11:40:59 -04:00
Matt Traudt
4bc97c6431 sched: revisist compatibility on non-linux systems
Wrap things in HAVE_KIST_SUPPORT until Tor compiles and tests cleanly on
my OS X machine.
2017-09-15 11:40:59 -04:00
Matt Traudt
7f1d643083 sched: validate KIST sched options 2017-09-15 11:40:59 -04:00
Matt Traudt
61fc9c41ad sched: switch to monotonic time; add/fix comments, style, and logs msgs 2017-09-15 11:40:59 -04:00
David Goulet
a06f2a0509 sched: Fallback to naive approach if no runtime KIST support
It is possible that tor was compiled with KIST support but the running kernel
has no support for it. In that case, fallback to a naive approach and flag
that we have no kernel support.

At this commit, if the kernel support is disabled, there are no ways to come
back from it other than restarting tor with a kernel that supporst KIST.

Signed-off-by: David Goulet <dgoulet@torproject.org>
2017-09-15 11:40:59 -04:00
David Goulet
8424c4f35b sched: Detect KIST support at compile time
Add a detection for the KIST scheduler in our build system and set
HAVE_KIST_SUPPORT if available.

Adapt the should use kist function with this new compile option.

Signed-off-by: David Goulet <dgoulet@torproject.org>
2017-09-15 11:40:59 -04:00
Matt Traudt
dde358667d sched: Implement the KIST scheduler
Closes #12541

Signed-off-by: David Goulet <dgoulet@torproject.org>
2017-09-15 11:40:59 -04:00
Matt Traudt
2034e0d1d4 sched: Groundwork before KIST implementation
- HT_FOREACH_FN defined in an additional place because nickm did that
  in an old kist prototype
- Make channel_more_to_flush mockable for future sched tests
- Add empty scheduler_{vanilla,kist}.c files and put in include.am

Signed-off-by: David Goulet <dgoulet@torproject.org>
2017-09-15 11:40:59 -04:00