Beefy Boxes and Bandwidth Generously Provided by pair Networks
Syntactic Confectionery Delight

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
UDP is a lossy protocol

Yes. That is the nature of udp. But for some applications, throughput and low latency are more important than absolute reliability, which is why udp exists.

For comms within the same machine where the "transmission" consists entirely of transfers between memory buffers, the scope for non-delivery is relatively low. Even on a local subnetwork with modern high-speed circuits, non-delivery is pretty unheard of unless the subring is running close to its maximum bandwidth. The main source for dropped packets is at the listener if it doesn't service them in a timely manner, which was the purpose of using two threads and buffering to ensure the recv loop could run as tightly as possible.

For the purposes of my testing, the mechanism for "detecting dropped packets" consisted of printing out how many were sent and how many were received. Good enough for a quick test. I had to make my machine work very hard indeed before it would drop any packets at all. By kicking out my firewall for a test I got close to a 1e6/minute using 5 producers before it started dropping packets.

However, whether the OPs statistics gathering requires 100% guarantee of accuracy, or just an ongoing indication of current trends where random dropouts are likely to affect all statistcs equally and so not affect their legitimacy--think random sampling--only he will know for sure.

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

In reply to Re^3: Multiple write locking for BerkeleyDB by BrowserUk
in thread Multiple write locking for BerkeleyDB by dino

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or How to display code and escape characters are good places to start.
Log In?

What's my password?
Create A New User
Domain Nodelet?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others perusing the Monastery: (2)
As of 2023-09-25 11:07 GMT
Find Nodes?
    Voting Booth?

    No recent polls found