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Type: refactor
Change-Id: I5235bf3e9aff58af6ba2c14e8c6529c4fc9ec86c
Signed-off-by: Damjan Marion <damarion@cisco.com>
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Type: refactor
Change-Id: I8b273bc3bf16aa360f031f1b2692f766e5fc4613
Signed-off-by: Damjan Marion <damarion@cisco.com>
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Type: fix
Signed-off-by: Dave Barach <dave@barachs.net>
Change-Id: Ibad744788e200ce012ad88ff59c2c34920742454
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Otherwise, all N worker threads try to sort the list at the same time:
a good way to have a bad day.
This approach performs *far* better than maintaing order by adding a
spin-lock. By direct measurement w/ elog + g2: 11 threads execute the
per-thread init function list in 22us, vs. 50ms with a CLIB_PAUSE()
enabled spin-lock.
Change-Id: I1745f2a213c0561260139a60114dcb981e0c64e5
Signed-off-by: Dave Barach <dave@barachs.net>
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The vlib init function subsystem now supports a mix of procedural and
formally-specified ordering constraints. We should eliminate procedural
knowledge wherever possible.
The following schemes are *roughly* equivalent:
static clib_error_t *init_runs_first (vlib_main_t *vm)
{
clib_error_t *error;
... do some stuff...
if ((error = vlib_call_init_function (init_runs_next)))
return error;
...
}
VLIB_INIT_FUNCTION (init_runs_first);
and
static clib_error_t *init_runs_first (vlib_main_t *vm)
{
... do some stuff...
}
VLIB_INIT_FUNCTION (init_runs_first) =
{
.runs_before = VLIB_INITS("init_runs_next"),
};
The first form will [most likely] call "init_runs_next" on the
spot. The second form means that "init_runs_first" runs before
"init_runs_next," possibly much earlier in the sequence.
Please DO NOT construct sets of init functions where A before B
actually means A *right before* B. It's not necessary - simply combine
A and B - and it leads to hugely annoying debugging exercises when
trying to switch from ad-hoc procedural ordering constraints to formal
ordering constraints.
Change-Id: I5e4353503bf43b4acb11a45fb33c79a5ade8426c
Signed-off-by: Dave Barach <dave@barachs.net>
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Change-Id: I7b51f88292e057c6443b12224486f2d0c9f8ae23
Signed-off-by: Damjan Marion <damarion@cisco.com>
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