[Bro-Dev] [JIRA] (BIT-1099) ./build/bro-git-20131129/lib/broctl/plugins/lb_myricom.py
jira at bro-tracker.atlassian.net
Mon Dec 2 16:58:45 PST 2013
[ https://bro-tracker.atlassian.net/browse/BIT-1099?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14900#comment-14900 ]
grigorescu commented on BIT-1099:
First off - is this actually causing a problem for you?
It's set this way to work with both SNF1 and SNF2. You're looking at SNF2, which doesn't define 0x100. SNF1 does:
# If incoming data is to be partitioned across rings via RSS, an
# alternative receive mode is to set the SNF_F_RX_PRIVATE=0x100 flag
# which reduces the amount of shared SNF references at the cost of
# an additional copy. This approach may provide better capture behavior
# when the RSS distribution is unbalanced or more generally, when the
# consumption rate of each process varies enough to cause large amounts
# of packet drops. Here we set the SNF_F_RX_PRIVATE=0x100 flag with
# SNF_F_PSHARED=0x1 flag to allow process-sharing.
# export SNF_FLAGS=0x101
Setting this to 0x101 shouldn't affect SNF2 drivers; it will be like 0x1 to them.
> Key: BIT-1099
> URL: https://bro-tracker.atlassian.net/browse/BIT-1099
> Project: Bro Issue Tracker
> Issue Type: Problem
> Components: BroControl
> Affects Versions: git/master
> Environment: RHEL6
> Myricom 10G
> Reporter: tyler.schoenke
> Labels: Myricom, RHEL6
> Hi All,
> First, unrelated, thanks for fixing whatever was wrong with PktSrc.cc:222. I was core dumping on that with the Myricom 10G until I upgraded to the latest git version of Bro.
> I had been running with my Myricom environment variables configured in .bash_profile, but decided to move them to etc/node.cfg because that feature is now available in Bro 2.2.
> When I tried to start the workers, they failed and I got the message to run diag. When I ran diag, I noticed it showed the following.
> 28366 snf.0.-1 P (environ) SNF_DATARING_SIZE = 2147483648 (0x80000000) (2048.0 MiB)
> 28366 snf.0.-1 P (default) SNF_DESCRING_SIZE = 536870912 (0x20000000) (512.0 MiB)
> 28366 snf.0.-1 P (userset) SNF_FLAGS = 257 (0x101)
> 28366 snf.0.-1 P (environ) SNF_DEBUG_MASK = 3 (0x3)
> 28366 snf.0.-1 P (default) SNF_DEBUG_FILENAME = stderr
> Everything looks great except for SNF_FLAGS. Myricom defaults it to 0x1, and that was working when I ran bro from the command line.
> I found it was getting set in ./build/bro-git-20131129/lib/broctl/plugins/lb_myricom.py
> According to /opt/snf/include/snf.h, the only valid values for SNF_FLAGS are 0x1, 0x2, and 0x300. No possible combination of those will add up to 0x101. I'm guessing that is a typo. If not, please explain why it is defaulted to that, otherwise you may want to default to 0x1.
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