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predictable_parallel_patterns
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Commit
01f8ff23
authored
Feb 09, 2021
by
Michael Schmid
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01f8ff23
...
@@ -93,7 +93,7 @@ Here are some good articles discussing jitter on linux systems:
...
@@ -93,7 +93,7 @@ Here are some good articles discussing jitter on linux systems:
-
https://community.mellanox.com/s/article/rivermax-linux-performance-tuning-guide--1-x (General Tips)
-
https://community.mellanox.com/s/article/rivermax-linux-performance-tuning-guide--1-x (General Tips)
We use the following settings:
We use the following settings:
```
shell script
```
mce=ignore_ce nosoftlockup nmi_watchdog=0 transparent_hugepage=never processor.max_cstate=1 idle=poll nohz=on nohz_full=1-7
mce=ignore_ce nosoftlockup nmi_watchdog=0 transparent_hugepage=never processor.max_cstate=1 idle=poll nohz=on nohz_full=1-7
```
```
...
@@ -115,7 +115,7 @@ our benchmark cores, to ensure low influence of background tasks. Cgroups also n
...
@@ -115,7 +115,7 @@ our benchmark cores, to ensure low influence of background tasks. Cgroups also n
the real time scheduler, as described here https://www.linuxjournal.com/article/10165, because
the real time scheduler, as described here https://www.linuxjournal.com/article/10165, because
they allow to adapt the scheduler to ignore the other cores in its decision making process.
they allow to adapt the scheduler to ignore the other cores in its decision making process.
Note the exclusive cpu groups in this output:
Note the exclusive cpu groups in this output:
```
sh
ell script
```
sh
florian@bananapim3:~
$
cset
set
florian@bananapim3:~
$
cset
set
cset:
cset:
Name CPUs-X MEMs-X Tasks Subs Path
Name CPUs-X MEMs-X Tasks Subs Path
...
@@ -126,7 +126,7 @@ cset:
...
@@ -126,7 +126,7 @@ cset:
```
```
Create a file called 'setup_cgroups.sh' and modify it with 'chmod +x setup_cgroups.sh':
Create a file called 'setup_cgroups.sh' and modify it with 'chmod +x setup_cgroups.sh':
```
sh
ell script
```
sh
#!/bin/bash
#!/bin/bash
sudo
cset shield
--cpu
=
1-7
-k
on
sudo
cset shield
--cpu
=
1-7
-k
on
...
@@ -142,7 +142,7 @@ Limiting the frequency to 1GHz makes sure that the banana PI dose not throttle d
...
@@ -142,7 +142,7 @@ Limiting the frequency to 1GHz makes sure that the banana PI dose not throttle d
Additionally, disabling any dynamic frequency scaling makes tests more reproducable.
Additionally, disabling any dynamic frequency scaling makes tests more reproducable.
Create a file called 'setup_cpu.sh' and modify it with 'chmod +x setup_cpu.sh':
Create a file called 'setup_cpu.sh' and modify it with 'chmod +x setup_cpu.sh':
```
sh
ell script
```
sh
#!/bin/bash
#!/bin/bash
echo
"Writing frequency utils settings file..."
echo
"Writing frequency utils settings file..."
...
@@ -160,7 +160,7 @@ echo "Test your cooling by stressing the cpu and watching the temperature output
...
@@ -160,7 +160,7 @@ echo "Test your cooling by stressing the cpu and watching the temperature output
```
```
Create a file called 'watch_cpu.sh' and modify it with 'chmod +x watch_cpu.sh':
Create a file called 'watch_cpu.sh' and modify it with 'chmod +x watch_cpu.sh':
```
`sh
ell script
```
`sh
#!/bin/bash
#!/bin/bash
echo "Min/Max Frequencies"
echo "Min/Max Frequencies"
...
@@ -190,7 +190,7 @@ Interrupts can infer with our benchmarks. We therefore map them to core 0 if pos
...
@@ -190,7 +190,7 @@ Interrupts can infer with our benchmarks. We therefore map them to core 0 if pos
cores 1 to 7.
cores 1 to 7.
Create a file called 'map_interrupts_core_0.sh' and modify it with 'chmod +x map_interrupts_core_0.sh':
Create a file called 'map_interrupts_core_0.sh' and modify it with 'chmod +x map_interrupts_core_0.sh':
```sh
ell script
```sh
#!/bin/bash
#!/bin/bash
echo "Try to map interrupts to core 0."
echo "Try to map interrupts to core 0."
...
@@ -215,7 +215,7 @@ leaving the system in a responsive state if a RT application eats all CPU. We do
...
@@ -215,7 +215,7 @@ leaving the system in a responsive state if a RT application eats all CPU. We do
try to get a very predictable behavior in our RT scheduler.
try to get a very predictable behavior in our RT scheduler.
Create a file called 'setup_rt.sh' and modify it with 'chmod +x setup_rt.sh':
Create a file called 'setup_rt.sh' and modify it with 'chmod +x setup_rt.sh':
```sh
ell script
```sh
#!/bin/bash
#!/bin/bash
sysctl -w kernel.sched_rt_runtime_us=1000000
sysctl -w kernel.sched_rt_runtime_us=1000000
...
...
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