Changing the client to leave its socket as blocking during the connect doesn't solve the problem by itself - you also have to introduce a sleep delay once the backlog is hit to avoid simply machine-gunning your way thru retries. This gets somewhat difficult to adjust as you don't want to unnecessarily prolong startup time.
We've solved this before by adding a listening thread that simply reaps accepts and shoves them into the event library for subsequent processing. This would resolve the problem, but meant yet another daemon-level thread. So I centralized the listening thread support and let multiple elements register listeners on it. Thus, each daemon now has a single listening thread that reaps accepts from multiple sources - for now, the orte/pmix server and the oob/usock support are using it. I'll add in the oob/tcp component later.
This still didn't fully resolve the SMP problem, especially on coprocessor cards (e.g., KNC). Removing the shared memory dstore support helped further improve the behavior - it looks like there is some kind of memory paging issue there that needs further understanding. Given that the shared memory support was about to be lost when I bring over the PMIx integration (until it is restored in that library), it seemed like a reasonable thing to just remove it at this point.
Have only a single level of "if" conditionals. Also, slightly change
the logic such that we only die/break out of the loop if we get EMFILE
-- all other errors are ok to go on to the next fd.
Finally, use a real show_help() message to warn when other errors occur.
The timeout is frequency at which to send keepalive pings; the retry
interval is how often to send successive pings once a keepalive has
not replied.
Also update comments and MCA param help strings.
60 seconds -- squashme
It is perfectly ok to be on a system without UD devices.
Also, make some of the error messages better -- so that the user has a
clue about where the error messages are coming from, and what they
should do.
There was a redundant computation of the vpid
for orted's happening in ess/alps rte_init
method. Keep the more efficient alps based
method.
Signed-off-by: Howard Pritchard <howardp@lanl.gov>
A few uninitialized common symbols are remaining (generated by flex) :
* orte/mca/rmaps/rank_file/rmaps_rank_file_lex.c: orte_rmaps_rank_file_leng
* orte/mca/rmaps/rank_file/rmaps_rank_file_lex.c: orte_rmaps_rank_file_text
* orte/util/hostfile/hostfile_lex.c: orte_util_hostfile_leng
* orte/util/hostfile/hostfile_lex.c: orte_util_hostfile_text
Move the call to opal_common_verbs_fork_test() to up before the call
to ibv_get_device_list() (just curious -- why not use
opal_ibv_get_device_list()?). This ensures that the call to
ibv_fork_init() is before *all* other ibv_* calls.
