Internet Assigned Numbers Authority
Performance Metrics
Created
2020-03-19
Last Updated
2025-01-14
Available Formats
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Plain text
Registries included below
??Performance Metrics Registry
??Performance Metric Name Elements - Metric Type
??Performance Metric Name Elements - Method
??Performance Metric Name Elements - SubTypeMethod
??Performance Metric Name Elements - Spec
??Performance Metric Name Elements - Units
??Performance Metric Name Elements - Output
Performance Metrics Registry
Registration Procedure(s)
Specification Required
Expert(s)
Greg Mirsky, Michael Scharf
Reference
[RFC8911]
Note
Summary category shown. Complete registry entries available in the URIs of each row.
Available Formats
[IMG]
CSV
Identifier Name URI Description Reference Change Version
Controller
0 Reserved [RFC8912] IETF
This metric
assesses the
delay of a
stream of
packets
exchanged
between two
hosts (which
are the two
measurement
points). The
1 RTDelay_Active_IP-UDP-Periodic_RFC8912sec4_Seconds_95Percentile RTDelay_Active_IP-UDP-Periodic_RFC8912sec4_Seconds_95Percentile output is the [RFC8912] IETF 1.0
round-trip
delay for all
successfully
exchanged
packets
expressed as
the 95th
percentile of
their
conditional
delay
distribution.
This metric
assesses the
loss ratio of
a stream of
packets
exchanged
between two
hosts (which
are the two
2 RTLoss_Active_IP-UDP-Periodic_RFC8912sec4_Percent_LossRatio RTLoss_Active_IP-UDP-Periodic_RFC8912sec4_Percent_LossRatio measurement [RFC8912][RFC IETF 1.0
points). The Errata 6758]
output is the
round-trip
loss ratio
for all
successfully
exchanged
packets
expressed as
a percentage.
This metric
assesses
packet delay
variation
with respect
to the
minimum delay
observed on
3 OWPDV_Active_IP-UDP-Periodic_RFC8912sec5_Seconds_95Percentile OWPDV_Active_IP-UDP-Periodic_RFC8912sec5_Seconds_95Percentile the periodic [RFC8912] IETF 1.0
stream. The
output is
expressed as
the 95th
percentile of
the packet
delay
variation
distribution.
This is a
metric for
DNS Response
performance
from a
network
user's
perspective,
for a
specific
named
resource. The
metric can be
4 RTDNS_Active_IP-UDP-Poisson_RFC8912sec6_Seconds_Raw RTDNS_Active_IP-UDP-Poisson_RFC8912sec6_Seconds_Raw measured [RFC8912] IETF 1.0
repeatedly
using
different
resource
names. This
metric
assesses the
response
time, the
interval from
the query
transmission
to the
response.
This is a
metric for
DNS Response
performance
from a
network
user's
perspective,
for a
specific
named
resource. The
metric can be
measured
5 RLDNS_Active_IP-UDP-Poisson_RFC8912sec6_Logical_Raw RLDNS_Active_IP-UDP-Poisson_RFC8912sec6_Logical_Raw repeatedly [RFC8912] IETF 1.0
using
different
resource
names. This
metric
indicates
that the
response was
deemed lost.
In other
words, the
response time
exceeded the
maximum
waiting time.
This metric
assesses the
delay of a
stream of
packets
exchanged
between two
hosts (or
measurement
points) and
6 OWDelay_Active_IP-UDP-Poisson-Payload250B_RFC8912sec7_Seconds_95Percentile OWDelay_Active_IP-UDP-Poisson-Payload250B_RFC8912sec7_Seconds_95Percentile reports the [RFC8912] IETF 1.0
95Percentile
of one-way
delay for all
successfully
exchanged
packets based
on their
conditional
delay
distribution.
This metric
assesses the
delay of a
stream of
packets
exchanged
between two
hosts (or
measurement
points) and
7 OWDelay_Active_IP-UDP-Poisson-Payload250B_RFC8912sec7_Seconds_Mean OWDelay_Active_IP-UDP-Poisson-Payload250B_RFC8912sec7_Seconds_Mean reports the [RFC8912] IETF 1.0
Mean of
one-way delay
for all
successfully
exchanged
packets based
on their
conditional
delay
distribution.
This metric
assesses the
delay of a
stream of
packets
exchanged
between two
hosts (or
measurement
points) and
8 OWDelay_Active_IP-UDP-Poisson-Payload250B_RFC8912sec7_Seconds_Min OWDelay_Active_IP-UDP-Poisson-Payload250B_RFC8912sec7_Seconds_Min reports the [RFC8912] IETF 1.0
Min of
one-way delay
for all
successfully
exchanged
packets based
on their
conditional
delay
distribution.
This metric
assesses the
delay of a
stream of
packets
exchanged
between two
hosts (or
measurement
points) and
9 OWDelay_Active_IP-UDP-Poisson-Payload250B_RFC8912sec7_Seconds_Max OWDelay_Active_IP-UDP-Poisson-Payload250B_RFC8912sec7_Seconds_Max reports the [RFC8912] IETF 1.0
Max of
one-way delay
for all
successfully
exchanged
packets based
on their
conditional
delay
distribution.
This metric
assesses the
delay of a
stream of
packets
exchanged
between two
hosts (or
measurement
points) and
10 OWDelay_Active_IP-UDP-Poisson-Payload250B_RFC8912sec7_Seconds_StdDev OWDelay_Active_IP-UDP-Poisson-Payload250B_RFC8912sec7_Seconds_StdDev reports the [RFC8912] IETF 1.0
StdDev of
one-way delay
for all
successfully
exchanged
packets based
on their
conditional
delay
distribution.
This metric
assesses the
loss ratio of
a stream of
packets
exchanged
between two
hosts (which
11 OWLoss_Active_IP-UDP-Poisson-Payload250B_RFC8912sec7_Percent_LossRatio OWLoss_Active_IP-UDP-Poisson-Payload250B_RFC8912sec7_Percent_LossRatio are the two [RFC8912][RFC IETF 1.0
measurement Errata 6758]
points). The
output is the
one-way loss
ratio for all
transmitted
packets
expressed as
a percentage.
This metric
assesses the
delay of a
stream of
packets
exchanged
between two
hosts (or
measurement
points) and
12 OWDelay_Active_IP-UDP-Periodic20m-Payload142B_RFC8912sec8_Seconds_95Percentile OWDelay_Active_IP-UDP-Periodic20m-Payload142B_RFC8912sec8_Seconds_95Percentile reports the [RFC8912] IETF 1.0
95Percentile
one-way delay
for all
successfully
exchanged
packets based
on their
conditional
delay
distribution.
This metric
assesses the
delay of a
stream of
packets
exchanged
between two
hosts (or
measurement
13 OWDelay_Active_IP-UDP-Periodic20m-Payload142B_RFC8912sec8_Seconds_Mean OWDelay_Active_IP-UDP-Periodic20m-Payload142B_RFC8912sec8_Seconds_Mean points) and [RFC8912] IETF 1.0
reports the
Mean one-way
delay for all
successfully
exchanged
packets based
on their
conditional
delay
distribution.
This metric
assesses the
delay of a
stream of
packets
exchanged
between two
hosts (or
measurement
14 OWDelay_Active_IP-UDP-Periodic20m-Payload142B_RFC8912sec8_Seconds_Min OWDelay_Active_IP-UDP-Periodic20m-Payload142B_RFC8912sec8_Seconds_Min points) and [RFC8912] IETF 1.0
reports the
Min one-way
delay for all
successfully
exchanged
packets based
on their
conditional
delay
distribution.
This metric
assesses the
delay of a
stream of
packets
exchanged
between two
hosts (or
measurement
15 OWDelay_Active_IP-UDP-Periodic20m-Payload142B_RFC8912sec8_Seconds_Max OWDelay_Active_IP-UDP-Periodic20m-Payload142B_RFC8912sec8_Seconds_Max points) and [RFC8912] IETF 1.0
reports the
Max one-way
delay for all
successfully
exchanged
packets based
on their
conditional
delay
distribution.
This metric
assesses the
delay of a
stream of
packets
exchanged
between two
hosts (or
measurement
points) and
16 OWDelay_Active_IP-UDP-Periodic20m-Payload142B_RFC8912sec8_Seconds_StdDev OWDelay_Active_IP-UDP-Periodic20m-Payload142B_RFC8912sec8_Seconds_StdDev reports the [RFC8912] IETF 1.0
StdDev
one-way delay
for all
successfully
exchanged
packets based
on their
conditional
delay
distribution.
This metric
assesses the
loss ratio of
a stream of
packets
exchanged
between two
hosts (which
17 OWLoss_Active_IP-UDP-Periodic20m-Payload142B_RFC8912sec8_Percent_LossRatio OWLoss_Active_IP-UDP-Periodic20m-Payload142B_RFC8912sec8_Percent_LossRatio are the two [RFC8912][RFC IETF 1.0
measurement Errata 6758]
points). The
output is the
one-way loss
ratio for all
transmitted
packets
expressed as
a percentage.
This metric
assesses the
delay of a
stream of
ICMP packets
exchanged
between two
hosts (which
are the two
measurement
points). The
18 RTDelay_Active_IP-ICMP-SendOnRcv_RFC8912sec9_Seconds_Mean RTDelay_Active_IP-ICMP-SendOnRcv_RFC8912sec9_Seconds_Mean output is the [RFC8912] IETF 1.0
round-trip
delay for all
successfully
exchanged
packets
expressed as
the Mean of
their
conditional
delay
distribution.
This metric
assesses the
delay of a
stream of
ICMP packets
exchanged
between two
hosts (which
are the two
measurement
points). The
19 RTDelay_Active_IP-ICMP-SendOnRcv_RFC8912sec9_Seconds_Min RTDelay_Active_IP-ICMP-SendOnRcv_RFC8912sec9_Seconds_Min output is the [RFC8912] IETF 1.0
round-trip
delay for all
successfully
exchanged
packets
expressed as
the Min of
their
conditional
delay
distribution.
This metric
assesses the
delay of a
stream of
ICMP packets
exchanged
between two
hosts (which
are the two
measurement
points). The
20 RTDelay_Active_IP-ICMP-SendOnRcv_RFC8912sec9_Seconds_Max RTDelay_Active_IP-ICMP-SendOnRcv_RFC8912sec9_Seconds_Max output is the [RFC8912] IETF 1.0
round-trip
delay for all
successfully
exchanged
packets
expressed as
the Max of
their
conditional
delay
distribution.
This metric
assesses the
loss ratio of
a stream of
ICMP packets
exchanged
between two
hosts (which
are the two [RFC8912][RFC
21 RTLoss_Active_IP-ICMP-SendOnRcv_RFC8912sec9_Percent_LossRatio RTLoss_Active_IP-ICMP-SendOnRcv_RFC8912sec9_Percent_LossRatio measurement Errata 6758] IETF 1.0
points). The
output is the
round-trip
loss ratio
for all
transmitted
packets
expressed as
a percentage.
This metric
assesses the
round-trip
delay of TCP
packets
constituting
a single
connection,
exchanged
between two
hosts. We
consider the
measurement
of round-trip
delay based
on a single
22 RTDelay_Passive_IP-TCP_RFC8912sec10_Seconds_Mean RTDelay_Passive_IP-TCP_RFC8912sec10_Seconds_Mean Observation [RFC8912] IETF 1.0
Point (OP)
[RFC7011]
somewhere in
the network.
The output is
the
round-trip
delay for all
successfully
exchanged
packets
expressed as
the Mean of
their
conditional
delay
distribution.
This metric
assesses the
round-trip
delay of TCP
packets
constituting
a single
connection,
exchanged
between two
hosts. We
consider the
measurement
of round-trip
delay based
on a single
23 RTDelay_Passive_IP-TCP_RFC8912sec10_Seconds_Min RTDelay_Passive_IP-TCP_RFC8912sec10_Seconds_Min Observation [RFC8912] IETF 1.0
Point (OP)
[RFC7011]
somewhere in
the network.
The output is
the
round-trip
delay for all
successfully
exchanged
packets
expressed as
the Min of
their
conditional
delay
distribution.
This metric
assesses the
round-trip
delay of TCP
packets
constituting
a single
connection,
exchanged
between two
hosts. We
consider the
measurement
of round-trip
delay based
on a single
24 RTDelay_Passive_IP-TCP_RFC8912sec10_Seconds_Max RTDelay_Passive_IP-TCP_RFC8912sec10_Seconds_Max Observation [RFC8912] IETF 1.0
Point (OP)
[RFC7011]
somewhere in
the network.
The output is
the
round-trip
delay for all
successfully
exchanged
packets
expressed as
the Max of
their
conditional
delay
distribution.
RTDelay
Singleton:
This metric
assesses the
round-trip
delay of TCP
packets
initiating a
single
connection
(or 3-way
handshake),
exchanged
between two
hosts. We
25 RTDelay_Passive_IP-TCP-HS_RFC8912sec10_Seconds_Singleton RTDelay_Passive_IP-TCP-HS_RFC8912sec10_Seconds_Singleton consider the [RFC8912] IETF 1.0
measurement
of round-trip
delay based
on a single
Observation
Point (OP)
[RFC7011]
somewhere in
the network.
The output is
a single
measurement
of Round-trip
delay, or
Singleton.
This metric
assesses the
estimated
loss count
for TCP
packets
constituting
a single
connection,
exchanged
between two
hosts. We
consider the
26 RTLoss_Passive_IP-TCP_RFC8912sec10_Packet_Count RTLoss_Passive_IP-TCP_RFC8912sec10_Packet_Count measurement [RFC8912] IETF 1.0
of round-trip
delay based
on a single
Observation
Point (OP)
[RFC7011]
somewhere in
the network.
The output is
the estimated
loss count
for the
measurement
interval.
Performance Metric Name Elements - Metric Type
Registration Procedure(s)
Specification Required
Expert(s)
Greg Mirsky, Michael Scharf
Reference
[RFC8911]
Available Formats
[IMG]
CSV
Identifier Name Description Reference Change Controller
MetricType RTDelay Round-Trip Delay [RFC8911] IETF
MetricType RTDNS Response Time Domain Name Service [RFC8911] IETF
MetricType RLDNS Response Loss Domain Name Service [RFC8911] IETF
MetricType OWDelay One-Way Delay [RFC8911] IETF
MetricType RTLoss Round-Trip Loss [RFC8911] IETF
MetricType OWLoss One-Way Loss [RFC8911] IETF
MetricType OWPDV One-Way Packet Delay Variation [RFC8911] IETF
MetricType OWIPDV One-Way Inter-Packet Delay Variation [RFC8911] IETF
MetricType OWReorder One-Way Packet Reordering [RFC8911] IETF
MetricType OWDuplic One-Way Packet Duplication [RFC8911] IETF
MetricType OWBTC One-Way Bulk Transport Capacity [RFC8911] IETF
MetricType OWMBM One-Way Model-Based Metric [RFC8911] IETF
MetricType SPMonitor Single-Point Monitor [RFC8911] IETF
MetricType MPMonitor Multi-Point Monitor [RFC8911] IETF
Performance Metric Name Elements - Method
Registration Procedure(s)
Specification Required
Expert(s)
Greg Mirsky, Michael Scharf
Reference
[RFC8911]
Available Formats
[IMG]
CSV
Identifier Name Description Reference Change Controller
Method Active depends on a dedicated measurement packet stream and observations of the stream as [RFC8911] IETF
described in [RFC7799]
Method Passive depends *solely* on observation of one or more existing packet streams as described in [RFC8911] IETF
[RFC7799]
Method Hybrid Type 1 Hybrid Type I obervations on one stream that combine both Active Methods and Passive [RFC8911] IETF
Methods as described in [RFC7799]
Method Hybrid Type 2 Hybrid Type II obervations on two or more streams that combine both Active Methods and [RFC8911] IETF
Passive Methods as described in [RFC7799]
Method Spatial spatial metric as described in [RFC5644] [RFC8911] IETF
Performance Metric Name Elements - SubTypeMethod
Registration Procedure(s)
Specification Required
Expert(s)
Greg Mirsky, Michael Scharf
Reference
[RFC8911]
Available Formats
[IMG]
CSV
Identifier Name Description Reference Change Controller
SubTypeMethod ICMP Internet Control Message Protocol [RFC8911] IETF
SubTypeMethod IP Internet Protocol [RFC8911] IETF
SubTypeMethod DSCPxx where xx is replaced by a Diffserv code point [RFC8911] IETF
SubTypeMethod UDP User Datagram Protocol [RFC8911] IETF
SubTypeMethod TCP Transport Control Protocol [RFC8911] IETF
SubTypeMethod QUIC QUIC transport protocol [RFC8911] IETF
SubTypeMethod HS Hand-Shake, such as TCP's 3-way HS [RFC8911] IETF
SubTypeMethod Poisson packet generation using Poisson distribution [RFC8911] IETF
SubTypeMethod Periodic periodic packet generation [RFC8911] IETF
SubTypeMethod SendOnRcv Sender keeps one packet in transit by sending when previous packet arrives [RFC8911] IETF
SubTypeMethod PayloadxxxxB where xxxx is replaced by an integer, the number of octets or 8-bit Bytes in the [RFC8911] IETF
Payload
SubTypeMethod SustaninedBurst capacity test, worst case [RFC8911] IETF
SubTypeMethod StandingQueue test of bottleneck queue behavior [RFC8911] IETF
Performance Metric Name Elements - Spec
Registration Procedure(s)
Specification Required
Expert(s)
Greg Mirsky, Michael Scharf
Reference
[RFC8911]
Note
Spec contains an immutable document identifier combined with a document section identifier for the specifying document.
See Section 7.1.2 of [RFC8911].
Available Formats
[IMG]
CSV
Identifier Reference
Spec [RFC8911]
Performance Metric Name Elements - Units
Registration Procedure(s)
Specification Required
Expert(s)
Greg Mirsky, Michael Scharf
Reference
[RFC8911]
Available Formats
[IMG]
CSV
Identifier Name Description Reference Change Controller
Units Seconds [RFC8911] IETF
Units Ratio unitless [RFC8911] IETF
Units Percent value multiplied by 100% [RFC8911] IETF
Units Logical 1 or 0 [RFC8911] IETF
Units Packets [RFC8911] IETF
Units BPS bits per second [RFC8911] IETF
Units PPS packets per second [RFC8911] IETF
Units EventTotal for unitless counts [RFC8911] IETF
Units Multiple more than one type of unit [RFC8911] IETF
Units Enumerated a list of outcomes [RFC8911] IETF
Units Unitless [RFC8911] IETF
Performance Metric Name Elements - Output
Registration Procedure(s)
Specification Required
Expert(s)
Greg Mirsky, Michael Scharf
Reference
[RFC8911]
Available Formats
[IMG]
CSV
Identifier Name Description Reference Change Controller
Output Singleton [RFC8911] IETF
Output Raw multiple singletons [RFC8911] IETF
Output Count [RFC8911] IETF
Output Minimum [RFC8911] IETF
Output Maximum [RFC8911] IETF
Output Median [RFC8911] IETF
Output Mean [RFC8911] IETF
Output 95Percentile 95th Percentile [RFC8911] IETF
Output 99Percentile 99th Percentile [RFC8911] IETF
Output StdDev standard deviation [RFC8911] IETF
Output Variance [RFC8911] IETF
Output PFI pass, fail, inconclusive [RFC8911] IETF
Output FlowRecords descriptions of flows observed [RFC8911] IETF
Output LossRatio lost packets to total packets, <=1 [RFC8911] IETF
Licensing Terms
Presently we were in a very dark road, and at a point where it dropped suddenly between steep sides we halted in black shadow. A gleam of pale sand, a whisper of deep flowing waters, and a farther glimmer of more sands beyond them challenged our advance. We had come to a "grapevine ferry." The scow was on the other side, the water too shoal for the horses to swim, and the bottom, most likely, quicksand. Out of the blackness of the opposite shore came a soft, high-pitched, quavering, long-drawn, smothered moan of woe, the call of that snivelling little sinner the screech-owl. Ferry murmured to me to answer it and I sent the same faint horror-stricken tremolo back. Again it came to us, from not farther than one might toss his cap, and I followed Ferry down to the water's edge. The grapevine guy swayed at our side, we heard the scow slide from the sands, and in a few moments, moved by two videttes, it touched our shore. Soon we were across, the two videttes riding with us, and beyond a sharp rise, in an old opening made by the swoop of a hurricane, we entered the silent unlighted bivouac of Ferry's scouts. Ferry got down and sat on the earth talking with Quinn, while the sergeants quietly roused the sleepers to horse. Plotinus is driven by this perplexity to reconsider the whole theory of Matter.477 He takes Aristotle¡¯s doctrine as the groundwork of his investigation. According to this, all existence is divided into Matter and Form. What we know of things¡ªin other words, the sum of their differential characteristics¡ªis their Form. Take away this, and the unknowable residuum is their Matter. Again, Matter is the vague indeterminate something out of which particular Forms are developed. The two are related as Possibility to Actuality, as the more generic to the more specific substance through every grade of classification and composition. Thus there are two Matters, the one sensible and the other intelligible. The former constitutes the common substratum of bodies, the other the common element of ideas.478 The general distinction between Matter and Form was originally suggested to Aristotle by Plato¡¯s remarks on the same subject; but he differs325 from his master in two important particulars. Plato, in his Timaeus, seems to identify Matter with space.479 So far, it is a much more positive conception than the ?λη of the Metaphysics. On the other hand, he constantly opposes it to reality as something non-existent; and he at least implies that it is opposed to absolute good as a principle of absolute evil.480 Thus while the Aristotelian world is formed by the development of Power into Actuality, the Platonic world is composed by the union of Being and not-Being, of the Same and the Different, of the One and the Many, of the Limit and the Unlimited, of Good and Evil, in varying proportions with each other. The Lawton woman had heard of an officer's family at Grant, which was in need of a cook, and had gone there. [See larger version] On the 8th of July an extraordinary Privy Council was summoned. All the members, of whatever party, were desired to attend, and many were the speculations as to the object of their meeting. The general notion was that it involved the continuing or the ending of the war. It turned out to be for the announcement of the king's intended marriage. The lady selected was Charlotte, the second sister of the Duke of Mecklenburg-Strelitz. Apart from the narrowness of her education, the young princess had a considerable amount of amiability, good sense, and domestic taste. These she shared with her intended husband, and whilst they made the royal couple always retiring, at the same time they caused them to give, during their lives, a moral air to their court. On the 8th of September Charlotte arrived at St. James's, and that afternoon the marriage took place, the ceremony being performed by the Archbishop of Canterbury. On the 22nd the coronation took place with the greatest splendour. Mother and girls were inconsolable, for each had something that they were sure "Si would like," and would "do him good," but they knew Josiah Klegg, Sr., well enough to understand what was the condition when he had once made up his mind. CHAPTER V. THE YOUNG RECRUITS Si proceeded to deftly construct a litter out of the two guns, with some sticks that he cut with a knife, and bound with pawpaw strips. His voice had sunk very low, almost to sweetness. A soft flurry of pink went over her face, and her eyelids drooped. Then suddenly she braced herself, pulled herself taut, grew combative again, though her voice shook. HoME²Ô¾®Ïè̫ʲôÐÇ×ù
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