Skip to content
Projects
Groups
Snippets
Help
Loading...
Help
Support
Keyboard shortcuts
?
Submit feedback
Contribute to GitLab
Sign in / Register
Toggle navigation
T
tsn-measures
Project overview
Project overview
Details
Activity
Releases
Repository
Repository
Files
Commits
Branches
Tags
Contributors
Graph
Compare
Issues
0
Issues
0
List
Boards
Labels
Milestones
Merge Requests
0
Merge Requests
0
CI / CD
CI / CD
Pipelines
Jobs
Schedules
Analytics
Analytics
CI / CD
Repository
Value Stream
Wiki
Wiki
Snippets
Snippets
Members
Members
Collapse sidebar
Close sidebar
Activity
Graph
Create a new issue
Jobs
Commits
Issue Boards
Open sidebar
nexedi
tsn-measures
Commits
665e4d0e
Commit
665e4d0e
authored
Sep 24, 2020
by
Joanne Hugé
Browse files
Options
Browse Files
Download
Email Patches
Plain Diff
Regenerate report
parent
c26ea32e
Changes
1
Hide whitespace changes
Inline
Side-by-side
Showing
1 changed file
with
20 additions
and
14 deletions
+20
-14
measure-analysis/measure-report.md
measure-analysis/measure-report.md
+20
-14
No files found.
measure-analysis/measure-report.md
View file @
665e4d0e
...
@@ -90,24 +90,30 @@ Metadata | Minimum | Max
...
@@ -90,24 +90,30 @@ Metadata | Minimum | Max
## Additional measures
## Additional measures
## Packet
recept
ion latency
## Packet
transmiss
ion latency
Shuttle to A20, no XDP
### Shuttle to A20
W
ith tracing and timestamps (some overhead):
#### Measures done w
ith tracing and timestamps (some overhead):
| Latency measured | min | avg | max |
**Without XDP:**
| -------------------------------------- | ------ | ------ | ------ |
| IRQ -> RX SO_TIMESTAMP | 27us | 31us | 136us |
| RX SO_TIMESTAMP -> Userspace timestamp | 85us | 93us | 247us |
| IRQ -> Userspace timestamp | 112us | 124us | 383us |
|
**Latency measured**
|
**min**
|
**avg**
|
**max**
|
| -------------------------------------- | ------- | ------- | ------- |
| IRQ -> RX SO_TIMESTAMP | 27us | 31us | 136us |
| RX SO_TIMESTAMP -> Userspace timestamp | 85us | 93us | 247us |
| IRQ -> Userspace timestamp | 112us | 124us | 383us |
With timestamps (little overhead):
**With XDP:**
| Latency measured | min | avg | max |
IRQ -> XDP_REDIRECT : ~30us (more measures needs to be done)
| -------------------------------------- | ------ | ------ | ------ |
| Shuttle timestamp -> A20 timestamp | 88us | 88us | 300us |
#### Measures done with timestamps (little overhead):
| RX SO_TIMESTAMP (A20) | 67us | 172us | 173us |
| TX SO_TIMESTAMP -> (Shuttle) | 2us | 18us | 20us |
|
**Latency measured**
| |
**Duration**
|
**Packets number**
|
**Interval**
|
**min**
|
**avg**
|
**max**
|
| -------------------------------------- | ------ | ------------ | ------------------ | ------------ | ------- | ------ | ------ |
| Shuttle timestamp -> A20 timestamp | XDP | 2h45 | 50 100 000 | 250us | 22us | 24us | 173us |
| Shuttle timestamp -> A20 timestamp | no XDP | | | | 88us | 88us | 300us |
| RX SO_TIMESTAMP (A20) | no XDP | | | | 67us | 172us | 173us |
| TX SO_TIMESTAMP -> (Shuttle) | no XDP | | | | 2us | 18us | 20us |
Write
Preview
Markdown
is supported
0%
Try again
or
attach a new file
Attach a file
Cancel
You are about to add
0
people
to the discussion. Proceed with caution.
Finish editing this message first!
Cancel
Please
register
or
sign in
to comment