k, it gets time from there and the clients simply time-out
their ntpdate commands. Then when it is on the little network, the
laptop's attempt at ntpdate is the one that times-out and the clients
get time from the laptop.
rick jones
--
The glass is neither half-empty nor half-full. The glass
ils,
> how do you decide which of two servers is "better"?
If one would get a '*' or '+' in ntpq peers output, and the other
would not, then it is better?
rick jones
--
The computing industry isn't as much a game of "Follo
ght to the flag character.
> Say +3 for a *, +1 for a +, and -1 for a -.
I realize the world of NTP isn't a world usually satisfied with "good
enough" :) But isn't "right now" more important than "12 hours ago?"
I suppose that one could presume that being a goo
I was wondering - is everyone confident enough that all these clients
choosing the "best" servers won't eventually settle on the same small
handfull of them?
rick jones
--
a wide gulf separates "what if" from "if only"
these opinions are mine, all mine; HP mi
em it seems those values (EAI_mumble) are in
/usr/include/netdb.h:
$ find /usr/include -exec grep -l EAI_FAIL {} \;
/usr/include/netdb.h
and when I look there it suggests that a value of 9 means:
# define EAI_SERVICE 9 /* service not supported for ai_socktype */
which implies (in my min
is why? That's the reason I want to see the config file.
Actaully, I'm absent minded enough that it didn't cross my mind :)
rick jones
--
Process shall set you free from the need for rational thought.
these opinions are mine, all mine; HP might not want them anyway... :)
feel free
rve it in order to prevent future confusion.
"Reserve" may be too strong a word - it leads to confusion among
recent inductees who then think the likes of /etc/services prevents
others from binding to thsoe port numbers.
rick jones
--
Wisdom Teeth are impacted, people are affected by the effe
Jason Rabel <[EMAIL PROTECTED]> wrote:
> +1 for OpenWRT! I installed it on a Dell Truemoble 2300 router I got
> off eBay for ~$10. The hardware is more or less identical to the
> Linksys WRT54G, just much cheaper to buy secondhand.
Ah, but can you wire a PPS (?) GPS to it
they have no
Sunnyvale location :)
A bit of creative license I suppose, but just how much creative
license is permissible in an article about people keeping accurate
time?-)
rick jones
[1] http://www.jobs.agilent.com/locations/usa.html
--
The glass is neither half-empty nor half-full. The glass h
ot knowing much about atomic clocks), I thought it
> was a fairly good article.
Agreed.
rick jones
--
No need to believe in either side, or any side. There is no cause.
There's only yourself. The belief is in your own precision. - Jobert
these opinions are mine, all mine; HP might not wa
pointers etc most welcome,
rick jones
BTW, in this case, I disabled the interrupt coalescing on Client 1's
NIC, which I believe is the reason for the difference in delay between
Client 1 and 2 and linger.raj - all three are on the same LAN. It
gets lost in the noise talking to the other tw
David Woolley <[EMAIL PROTECTED]> wrote:
> In article <[EMAIL PROTECTED]>,
> Rick Jones <[EMAIL PROTECTED]> wrote:
> > taps with clue bats, is if I can take the difference in offset
> > between each client and the time server and ass-u-me that is the
> >
Richard B. Gilbert <[EMAIL PROTECTED]> wrote:
> Rick Jones wrote:
> > David Woolley <[EMAIL PROTECTED]> wrote:
> >
> >>In article <[EMAIL PROTECTED]>,
> >>Rick Jones <[EMAIL PROTECTED]> wrote:
> >
> >
> >>>taps w
suppose I could also try to see if I can get the powers that be to
spring for a GPS18 and see if I can indeed get signal in the machine
room(s) of interest.
Speaking of which, I was just at the garmin website, and seems they
now have a GPS18 5HZ in addition to the regular GPS18. Is there any
benef
ll read the time from the
> reference signal of a CDMA cell phone base station and serve time
> via NTP.
I might be able to convince TPTB to fund a GPS18 or GPS185Hz
"experiment." In this _specific_ instance the building is two stories
plus a mezzanine. Perhaps I could get lucky.
ri
ntpd wasn't running on bl480c2. Shortly
after restarting, the offset reported by bl480c1 was 0.100 rather than
0.002.
rick jones
--
portable adj, code that compiles under more than one compiler
these opinions are mine, all mine; HP might not want them anyway... :)
feel free to post,
Rick Jones <[EMAIL PROTECTED]> wrote:
> On bl480c1:
> ntpq> peers
> remote refid st t when poll reach delay offset jitter
> ==
> bl480c2.raj 10.208.0.1 3 u
Rick Jones <[EMAIL PROTECTED]> wrote:
> Here is what I have now that I've dropped the minpoll from the server
> and dropped LOCAL:
> peer bl480c2 minpoll 3 maxpoll 4 iburst
> server 10.208.0.1 iburst
> server 10.0.0.1
> server 10.202.1.1
Scratch that - I commented-ou
ted that on both ends (adjusting peer accordingly) and
will see how that settles-in.
thanks,
rick jones
--
oxymoron n, commuter in a gas-guzzling luxury SUV with an American flag
these opinions are mine, all mine; HP might not want them anyway... :)
feel free to post, OR email to rick.jones2 i
s (or is it owned by Agilent now?). Even
> better, a cesium clock!
The clocks went to Agilent, whom I believe sold that part of the
business to another entity.
rick jones
--
No need to believe in either side, or any side. There is no cause.
There's only yourself. The belief is in your own p
rious flavors of *nix would be the 99% solutuion here.
rick jones
--
Process shall set you free from the need for rational thought.
these opinions are mine, all mine; HP might not want them anyway... :)
feel free to post, OR email to rick.jo
Danny Mayer <[EMAIL PROTECTED]> wrote:
> While Rick may be a relative newbie to NTP he has had years of
> conducting performance analysis of applications and systems. His
> performance testing of BIND9 is probably *the* seminal reference on
> DNS testing.
Now _that_ is scar
ck is the author of netperf ;-)
Shhhh! It's a secret!-)
rick jones
about to hit-up "management" for aproval to buy a GPS-18 for some
experiments, unless someone knows of a better device...
--
The glass is neither half-empty nor half-full. The glass has a leak.
The real question
en started,
without ntpd having to periodically scan for new IP's on the system
(and possibly miss one that was only around for less than ntpd's
rescan interval).
rick jones
--
web2.0 n, the dot.com reunion tour...
these opinions are mine, all mine; HP might not want them anyway... :)
Harlan Stenn <[EMAIL PROTECTED]> wrote:
> Rick,
> OK with you if I incorporate the stuff in your response on
> http://support.ntp.org/bin/view/Dev/NtpdAndNetworkSockets
> ? I'll either clarify things per your comments or add your comments in.
Fine by me.
rick jones
--
mply I was troubled, just pointing-out how it might
conceivably work if one went with last-wins.
> > One thing about a socket bound to a wildcard address is that it will
> > pick-up traffic from interfaces enabled after ntpd has been started,
> > without ntpd having to periodical
d address does not prevent another process
> binding to a different IP address that ntpd is not bound. At least I
> don't believe so.
We may be in semi-violent agreement there. I am just mentioning it as
part of pointing-out that there are no guarantees that ntpd can
preclude other norma
netperf TCP_RR behaviour
on a number of NICs and their drivers.
rick jones
--
oxymoron n, Hummer H2 with California Save Our Coasts and Oceans plates
these opinions are mine, all mine; HP might not want them anyway... :)
feel free to post, OR email to rick.jones2 in hp.com but NOT BOTH...
gets involved, but just on its own, the forwarding
table in a switch being aged should only mean that the next frame to
that MAC will go out all (enabled) ports on the switch until that MAC
is seen again as a source. That shouldn't affect timing really.
rick jones
--
a wide gulf separates
ay based on
the previous text discussing ARP caches.
rick jones
--
The glass is neither half-empty nor half-full. The glass has a leak.
The real question is "Can it be patched?"
these opinions are mine, all mine; HP might not want them anyway... :)
feel free t
Brian Utterback <[EMAIL PROTECTED]> wrote:
> Rick Jones wrote:
> > Eric <[EMAIL PROTECTED]> wrote:
> >> Then there is the MAC cache in your switches, which generally
> >> purge after 1-5 minutes. This can often be adjusted higher, but
> >> that can
ackets sent back-to-back.
rick jones
--
No need to believe in either side, or any side. There is no cause.
There's only yourself. The belief is in your own precision. - Jobert
these opinions are mine, all mine; HP might not want them anyway... :)
feel free to post, OR email to rick.jones2 i
Rick Jones <[EMAIL PROTECTED]> wrote:
> I suppose I could also try to see if I can get the powers that be to
> spring for a GPS18 and see if I can indeed get signal in the machine
> room(s) of interest.
Before I did that I borrowed a hand-held GPS receiver (Magellan
"Crossover
Steve Kostecke <[EMAIL PROTECTED]> wrote:
> My GPS18LVC works through a standard US residential roof. But you
> probably have lots of metal in the way. So ... YMWV
Yep - basic concrete, steel and glass US office building - in this
case a "standard" HP "BigFoot" bu
r merge the two :)
rick jones
--
portable adj, code that compiles under more than one compiler
these opinions are mine, all mine; HP might not want them anyway... :)
feel free to post, OR email to rick.jones2 in hp.com but NOT BOTH...
___
questio
" by the bonding driver.
On other platforms that might be called "trunking" or port aggregation
etc. The "transport" (IP and above) sees just the one interface (eg
bond0) which then handles all the nitty gritty details of
link-failover and/or load balancing among the physical i
Maarten Wiltink <[EMAIL PROTECTED]> wrote:
> I'm no IP wizard, but isn't there a SO_REUSEPORT flag or something
> like that?
It still (IIRC) lacks sufficient ubiquity and the semantics on the
various platforms may not match what is desired.
rick jones
--
denial, anger,
d file system standard.
But there are so many from which to choose :) SYSV, probably one from
Posix/Xopen, Linux Standard Base (?) etc etc :)
rick jones
--
a wide gulf separates "what if" from "if only"
these opinions are mine, all mine; HP might not want them anyway... :
ng write-up. Not sure I understand all of it of course, but
interesting regardless. Since no good deed goes unpunished and since
I have an insatiable curiousity I will ask :)
*) is that just the T5120 or is it more generally the T5X20?
*) is the T5X40 affected
sincerely,
rick jones
--
oxy
n those things
when part of the chip would slow-down, but not other parts and that it
confused things wrt time.
rick jones
--
Process shall set you free from the need for rational thought.
these opinions are mine, all mine; HP might not want them anyway... :)
feel free to post, OR email to rick.
a name/IP has been active for N units of
time cannot really be used as an accurate estimate of the age of the
hardware behind it :)
I've had several systems over a number of years called
tardy.cup.hp.com...
rick jones
--
portable adj, code that compiles under more than one compiler
these opin
another socket, but as I'm
typing I cannot think of it.
rick jones
--
web2.0 n, the dot.com reunion tour...
these opinions are mine, all mine; HP might not want them anyway... :)
feel free to post, OR email to rick.jones2 in hp.com but NOT BOTH...
___
Danny Mayer <[EMAIL PROTECTED]> wrote:
> Rick Jones wrote:
> > If it simply sends via the socket on which the query was recieved,
> > having bound that socket to a given IP should result in that IP being
> > used as the source IP of the response.
> >
> >
at they probably actually want is a flag that says "delay
> daemonizing until the first time the clock is set".
But still want things to happen "quickly" for some relative definition
of quickly that probably does not encompass the length of time most
(and I do mean the term affectiona
y be
known well enough in advance, I don't think that can be relied
upon. Yes, there is a counter argument that "if they need such quick
reaction they should have a warm standby" but "green" issues may often
trump that.
rick jones
--
a wide gulf separates "what if" fr
7;m sure I'm about to soil my shoe in what may be an old and
well-trodden pile, but if sntp can set the time as well and as quickly
as ntpdate, why a new program rather than fixes/enhancements to the
old one? Command-name inertia can be rather strong. Eg nslookup vs
dig or host.
rick
rces I ask aren't yet synced? I'm wondering if being set to a time
close to that of an unsynced server above me in the tree is better
than no time setting at all.
rick jones
--
Wisdom Teeth are impacted, people are affected by the effects of events.
these opinions are mine, all mine; HP m
bump
> things up a bit.]
Maybe... if they could also bump-up the price a bit. :) And then there
is binning...
rick jones
--
denial, anger, bargaining, depression, acceptance, rebirth...
where do you want to be today?
these opinions are mine, all mine; HP
mponents already in the system
rather than adding another temp probe? Stuff like CPU temps and other
intra-system components. I'm not sure they have nearly the same
accuracy and resolution though :(
rick jones
--
No need to believe in either side, or any side. There is no cause.
There'
Unruh <[EMAIL PROTECTED]> wrote:
> ( assuming that the network noise is at the 100us type level).
That feels like a rather large assumption given the target environment
does not seem to allow the system to be synced to be up long-term.
rick jones
--
Wisdom Teeth are impacted, p
I played around in this area a while ago. I didn't get good results
> until I glued the temperature probe to the xtal. That one reads
> to 0.1F,
Sigh. I was hoping there might be a middle ground using stuff already
present in the system.
rick jones
--
The computing industry isn&#x
Hal Murray <[EMAIL PROTECTED]> wrote:
> My DSL line has 100 ms of queueing delays.
That "feels" about right if one assumes the goal is to enable
link-rate on a transcontinental (US at least) path.
rick jones
http://www.netperf.org/
--
Wisdom Teeth are impacted, people
A-RISC interval counter) or its
equivalent (assuming there is one and reading it isn't too nasty) on
entry and exit.
rick jones
--
The computing industry isn't as much a game of "Follow The Leader" as
it is one of "Ring Around the Rosy" or perhaps "Duck Duck Goose.&
reshold, say, 2 ms, configuring the
> system to just throw away all packets with latency greater than 2
> ms?
What precisely do you mean by "the system" in this context? The
TCP/IP stack running on the system on which NTP is running, or in NTP
itself?
rick jones
--
a wide gulf separa
Jeremy Leibs <[EMAIL PROTECTED]> wrote:
> On Sat, Dec 6, 2008 at 3:40 PM, Rick Jones <[EMAIL PROTECTED]> wrote:
> > Jeremy Leibs <[EMAIL PROTECTED]> wrote:
> > > Is there possibly a way of configuring the maximum acceptable
> > > latency of a packet
version of it can be found at:
ftp://ftp.cup.hp.com/dist/networking/briefs/nic_latency_vs_tput.txt
Not all NIC/driver combinations do it as badly as others. I've
encountered at least one, perhaps two 10GbE NICs which seem to at
least pass the TCP_RR sniff test and get both good TCP_RR performan
additional benefit of using them on top of Jumbo Frames although it is
in the realm of diminishing returns.
rick jones
--
The computing industry isn't as much a game of "Follow The Leader" as
it is one of "Ring Around the Rosy" or perhaps "Duck Duck Goose."
Ryan Malayter <[EMAIL PROTECTED]> wrote:
> On Mon, Dec 8, 2008 at 11:57 AM, Rick Jones <[EMAIL PROTECTED]> wrote:
> > "All" the 10G NICs and I suspect a decent number of the 1G NICs
> > support TSO or TCP/Transport Segmentation Offload. For the sender at
>
Terje Mathisen <[EMAIL PROTECTED]> wrote:
> Rick Jones wrote:
> > A while back I did a writeup on the tradeoff the NIC/driver
> > strappings were making. A version of it can be found at:
> >
> > ftp://ftp.cup.hp.com/dist/networking/briefs/nic_latency_vs_tput.t
hecksum on NIC"
cross-over is for UDP in various stacks, but many NICs can and do
perform CKO on UDP datagrams in addition to TCP. Heck, the HP-PB (aka
NIC) FDDI card of the mid 1990's did that. It could also header-data
split up through NFS on the way in. All with magic "if this
the interval counters on the disparate processors, and I think Linux
does the same. Which other OS/HW combinations do so I'm not sure.
rick jones
--
a wide gulf separates "what if" from "if only"
these opinions are mi
he network to appear to the host to arrive at
essentially the same instant. Their separation in the eyes of the
host will depend on the speed at which the host processes them after
being nudged by the NIC.
rick jones
--
Wisdom Teeth are impacted, people are affected by the effects of events.
th
Rick Jones wrote:
> I don't know that it would pack them within a 100ns interval, but
> interupt coalescing in GbE and higher NICs can cause frames which
> were otherwise spread-out on the network to appear to the host to
> arrive at essentially the same instant. Their separat
7;t 100ns more or less a cache miss on a
processor today? Yes, some are less then that some are more but
O(100ns) seems about right.
rick jones
--
I don't interest myself in "why." I think more often in terms of
"when," sometimes "where;" always "how much
right? It wouldn't be GPS PPS - but
perhaps one could call it POTS PPTS (Pulse Per Ten Seconds). :) :)
rick jones
--
I don't interest myself in "why." I think more often in terms of
"when," sometimes "where;" always "how much." - Joubert
these
David J Taylor
wrote:
> One suggestion might be wireless
Isn't that just asking for jitter?
rick jones
--
oxymoron n, Hummer H2 with California Save Our Coasts and Oceans plates
these opinions are mine, all mine; HP might not want them anyway... :)
feel free to post, OR email to ric
David J Taylor
wrote:
> Rick Jones wrote:
> > David J Taylor
> > wrote:
> >> One suggestion might be wireless
> >
> > Isn't that just asking for jitter?
> Have you tried it?
No, I'm just channeling dimm memories of what half-duplex wired
E
lace to update the "pci.ids" file mapping
all the vendor, product, subvendor subproduct IDs in PCI cards to
human readable text.
http://pciids.sourceforge.net/
which is I believe what the "update-pciids" command under Linux (and
perhaps other OSes) will query when run.
rick jone
ay to deal
> with this?
I don't know about the general question, but there are likely folks in
comp.protocols.time.ntp who know about the www.ntp.org site and its
IPv6 status, so lets redirect the specific issue there. (I've set the
Followup-to: header on this post to that end)
ric
Rob wrote:
> This is no longer required. You can just use pool.ntp.org or
> 0.pool.ntp.org and the DNS servers for the pool will automatically
> determine which servers are closest to you.
Is that by geography, hop count or ICMP echo RTT?
rick jones
--
oxymoron n, commuter in a gas
Unruh wrote:
> (This is like asking-- if there is a garbage strike would you want
> people to put their garbage into bags and pile them up together or
> not use bags and spread it out evenly on the streets.
How large are the streets and how much garbage is there to be spread?
r
ic is flowing
through the NIC. In linux-land, some variations on ethtool commands
and/or modprobe parameters would be involved in diminishing if not
outright disabling the interrupt coalescing.
ftp://ftp.cup.hp.com/dist/networking/briefs/nic_latency_vs_tput.txt
is an old writeup, but it should give the
Has anyone asked Garmin about the specs vs what they've seen?
rick jones
--
oxymoron n, Hummer H2 with California Save Our Coasts and Oceans plates
these opinions are mine, all mine; HP might not want them anyway... :)
feel free to post, OR email to rick.jones2 in hp.com but NOT
E-Mail Sent to this address will be added to the BlackLists
wrote:
> Rick Jones wrote:
> > Has anyone asked Garmin about the specs vs what they've seen?
> <http://www8.garmin.com/support/pdf/iop_spec.pdf>
>
> 3 Physical Protocols
> 3.1 Serial Protocol
> The
nsity any single switch will use a mix of all
> transfertypes.
I don't think it is what you meant by "drop/cause resend" but
something else "new" in 1 Gigabit Ethernet relative to old 10/100 is
support for pause and resume (moral equivalent to xon/xoff?) flow
control.
rick jon
PCB or redesign a chassis when say
ostensibly socket-compatible wizzy new processor Z tickles things one
never saw before with processors W, X and Y?
rick jones
--
I don't interest myself in "why". I think more often in terms of
"when", sometimes "where"; always
Unruh wrote:
> E-Mail Sent to this address will be added to the BlackLists
> writes:
> >Rick Jones wrote:
> >>>> ... EMC / EMI, Unintentional / Incidental, Radiators
> >> And/or better educated customers willing and able to understand
> >> the va
quot;flood?" Broadcast implies ff:ff:ff:ff:ff:ff destination
MAC.
> Hail for the times hubs were dumb repeaters with neither memory nor
> intelligence ;-)
Indeed :) Of course, then we'd be complaining about variability in
back-off times and capture effect and whatnot instead :)
r
Uwe Klein wrote:
> Rick Jones wrote:
> > Uwe Klein wrote:
> >
> >>then:
> >>some pakets are sent as broadcast to all ports.
> >>switches store for each port the MAC addresses seen.
> >>I have no idea if modern switches do (r)arp queries to
&
"never"
wants to have the clock of say a database server "stepped."
rick jones
--
I don't interest myself in "why". I think more often in terms of
"when", sometimes "where"; always "how much." - Joubert
these opinions are mine, all min
seems that
it would be better to thank Wilson and the University of Melbourne for
their service to the community and wish them well. Our's is not to
second guess their decision.
rick jones
--
The glass is neither half-empty nor half-full. The glass has a leak.
The real question is "Can
casionally
build one's mnemonic memory circuits from stone knives and bear
skins?-) Or put another way, an example of the perils of speed-dial...
rick jones
--
I don't interest myself in "why." I think more often in terms of
"when," sometimes "where;" alwa
e
getting every query returned. What distinguishes TCP from UDP is that
TCP will make multiple attempts to deliver the data and then signal
the probable (but not certain) non-delivery of data.
rick jones
--
oxymoron n, commuter in a gas-guzzling luxury SUV with an American flag
these opinions are
inition of a fraction of a second, wouldn't an
iPhone already be getting rather accurate time from the cell towers?
Or are you also concerned about devices like the iPod touch?
rick jones
--
oxymoron n, commuter in a gas-guzzling luxury SUV with an American flag
these opinions are mine, a
er - is NTP, or more generally, time synchronization,
part of the affected set, or might it be part of the cure by helping
detect the spoofing?
rick jones
RISKS-LIST: Risks-Forum Digest Sunday 28 February 2010 Volume 25 : Issue 95
ACM FORUM ON RISKS TO THE PUBLIC IN COMPUTERS AND RELATED SYSTEMS
somehow mistyped?
> Ahh, be nice. We all know perfectly well how such things happen.
When it comes to this bikeshed I'm not sure I'd have called that a
typo either. Htis is a tyop.
Call it a cut-and-paste error, call it a bug. Heck, call it an honest
mistake or even an "oops
on
> and get millisecond precision, which is probably all they need.
Is it still "trivial" in a below-ground data center? Heck, even a
data center on the ground floor? It wasn't a GPS18x, but I tried
taking a garmin GPS12 into a few machine rooms and had no joy
whatsoever getting any
rohibited :)
rick jones
--
firebug n, the idiot who tosses a lit cigarette out his car window
these opinions are mine, all mine; HP might not want them anyway... :)
feel free to post, OR email to rick.jones2 in hp.com but NOT BOTH...
___
questions mai
inity of Cupertino, CA happens to
have one of these things and would care to visit... :)
rick jones
--
portable adj, code that compiles under more than one compiler
these opinions are mine, all mine; HP might not want them anyway... :)
feel free to post, OR email to rick.jones2
ns are we talking about here, and are the fixes
backported to distro kernels?
rick jones
--
A: Because it fouls the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing on usenet and in e-mail?
___
David Woolley wrote:
> Were I work, the number of cores are seriously over-committed, as is
> memory. Many modern server applications are designed to use all the
> cores that they can get.
The Law of Unintended Consequences strikes following the Demise of
Timesharing :)
rick jones
-
then while the "dock"
may not be out of sight, the submarine within it is. Or perhaps the
original poster is a minion of Dr. Evil and he is trying to sync time
to the servers back in the "in the volcano" lair :)
rick jones
--
portable adj, code that compiles under more than one com
DP on older Cisco switches hitting some throttle)?
rick jones
--
a wide gulf separates "what if" from "if only"
these opinions are mine, all mine; HP might not want them anyway... :)
feel free to post, OR email to rick.jone
h-holes the network traverses? Will any of
the other things traversing the through holes along with the network
cable(s) interfere with the single traversing the antenna cable to be
added? Presumably we cannot trust the network here, which means
getting GPS signals to the client.
rick jones
One wo
&sl=auto&tl=en
for those who don't speak French, or who failed it twice in high-school :)
rick jones
--
web2.0 n, the dot.com reunion tour...
these opinions are mine, all mine; HP might not want them anyway... :)
feel free to post
dependent network* for transmission
> and propagation of the GPS signals within/through the ship. Once
> again we're back to network problems, not GPS/timekeeping ones.
Will you agree that is part of the GPS-based solution?
rick jones
--
web2.0 n, the dot.com reunion tour...
these opi
there is a way to get
link-level stats from the ACEB, but how about from the port on the
4510W - if the link is half-duplex, how about collision counts or
excess retries?
rick jones
> May be this problem of latency and asymmetry comes from the ntp
> card.
--
The glass is neither hal
seen good
default behaviour on a couple other 10G NICs as well, but their names
escape me !-(
rick jones
--
The computing industry isn't as much a game of "Follow The Leader" as
it is one of "Ring Around the Rosy" or perhaps "Duck Duck Goose."
from() on the socket :) Or I suppose its call (does it
make one?) to gettimeofday() just afterwards.
rick jones
--
a wide gulf separates "what if" from "if only"
these opinions are mine, all mine; HP might not want them anyway... :)
feel free to post, OR email to rick.
eased load,
> the switch will bundle the traffic to the different nodes more and
> this will result in higher latency.
"How long is a piece of string?"
"It depends."
An unloaded Gigabit Ethernet network might have quite low latency, but
at the same time, a rather loaded
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