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documentation: use YOCTO_DL_URL

Browse Source 
(From yocto-docs rev: e3ad609d9fce8d6729bf6cb553993bddba1785ae)

Signed-off-by: Jon Mason <jdmason@kudzu.us>
Reviewed-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Jon Mason 2021-10-07 11:06:29 -04:00 committed by Richard Purdie
parent 58645b0586
commit 0638b77576
3 changed files with 26 additions and 26 deletions
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28
documentation/profile-manual/usage.rst
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@ -105,18 +105,18 @@ can be used in a very similar way to the whole host of supported BusyBox
applets in Yocto. ::
root@crownbay:~# rm linux-2.6.19.2.tar.bz2; \
wget https://downloads.yoctoproject.org/mirror/sources/linux-2.6.19.2.tar.bz2
wget &YOCTO_DL_URL;/mirror/sources/linux-2.6.19.2.tar.bz2
The quickest and easiest way to get some basic overall data about what's
going on for a particular workload is to profile it using 'perf stat'.
'perf stat' basically profiles using a few default counters and displays
the summed counts at the end of the run::
root@crownbay:~# perf stat wget https://downloads.yoctoproject.org/mirror/sources/linux-2.6.19.2.tar.bz2
root@crownbay:~# perf stat wget &YOCTO_DL_URL;/mirror/sources/linux-2.6.19.2.tar.bz2
Connecting to downloads.yoctoproject.org (140.211.169.59:80)
linux-2.6.19.2.tar.b 100% |***************************************************| 41727k 0:00:00 ETA
Performance counter stats for 'wget https://downloads.yoctoproject.org/mirror/sources/linux-2.6.19.2.tar.bz2':
Performance counter stats for 'wget &YOCTO_DL_URL;/mirror/sources/linux-2.6.19.2.tar.bz2':
4597.223902 task-clock # 0.077 CPUs utilized
23568 context-switches # 0.005 M/sec
@ -141,11 +141,11 @@ by 'perf stat'. For example, suppose we wanted to see a summary of all
the events related to kernel memory allocation/freeing along with cache
hits and misses::
root@crownbay:~# perf stat -e kmem:* -e cache-references -e cache-misses wget https://downloads.yoctoproject.org/mirror/sources/linux-2.6.19.2.tar.bz2
root@crownbay:~# perf stat -e kmem:* -e cache-references -e cache-misses wget &YOCTO_DL_URL;/mirror/sources/linux-2.6.19.2.tar.bz2
Connecting to downloads.yoctoproject.org (140.211.169.59:80)
linux-2.6.19.2.tar.b 100% |***************************************************| 41727k 0:00:00 ETA
Performance counter stats for 'wget https://downloads.yoctoproject.org/mirror/sources/linux-2.6.19.2.tar.bz2':
Performance counter stats for 'wget &YOCTO_DL_URL;/mirror/sources/linux-2.6.19.2.tar.bz2':
5566 kmem:kmalloc
125517 kmem:kmem_cache_alloc
@ -181,7 +181,7 @@ executed in a new shell). perf collects samples until the process exits
and records them in a file named 'perf.data' in the current working
directory. ::
root@crownbay:~# perf record wget https://downloads.yoctoproject.org/mirror/sources/linux-2.6.19.2.tar.bz2
root@crownbay:~# perf record wget &YOCTO_DL_URL;/mirror/sources/linux-2.6.19.2.tar.bz2
Connecting to downloads.yoctoproject.org (140.211.169.59:80)
linux-2.6.19.2.tar.b 100% |************************************************| 41727k 0:00:00 ETA
@ -219,7 +219,7 @@ between the new profile and the previous one is that we'll add the -g
option, which will record not just the address of a sampled function,
but the entire callchain to the sampled function as well::
root@crownbay:~# perf record -g wget https://downloads.yoctoproject.org/mirror/sources/linux-2.6.19.2.tar.bz2
root@crownbay:~# perf record -g wget &YOCTO_DL_URL;/mirror/sources/linux-2.6.19.2.tar.bz2
Connecting to downloads.yoctoproject.org (140.211.169.59:80)
linux-2.6.19.2.tar.b 100% |************************************************| 41727k 0:00:00 ETA
[ perf record: Woken up 3 times to write data ]
@ -527,8 +527,8 @@ workload, so let's choose the most likely subsystems (identified by the
string before the colon in the Tracepoint events) and do a 'perf stat'
run using only those wildcarded subsystems::
root@crownbay:~# perf stat -e skb:* -e net:* -e napi:* -e sched:* -e workqueue:* -e irq:* -e syscalls:* wget https://downloads.yoctoproject.org/mirror/sources/linux-2.6.19.2.tar.bz2
Performance counter stats for 'wget https://downloads.yoctoproject.org/mirror/sources/linux-2.6.19.2.tar.bz2':
root@crownbay:~# perf stat -e skb:* -e net:* -e napi:* -e sched:* -e workqueue:* -e irq:* -e syscalls:* wget &YOCTO_DL_URL;/mirror/sources/linux-2.6.19.2.tar.bz2
Performance counter stats for 'wget &YOCTO_DL_URL;/mirror/sources/linux-2.6.19.2.tar.bz2':
23323 skb:kfree_skb
0 skb:consume_skb
@ -589,7 +589,7 @@ run using only those wildcarded subsystems::
Let's pick one of these tracepoints
and tell perf to do a profile using it as the sampling event::
root@crownbay:~# perf record -g -e sched:sched_wakeup wget https://downloads.yoctoproject.org/mirror/sources/linux-2.6.19.2.tar.bz2
root@crownbay:~# perf record -g -e sched:sched_wakeup wget &YOCTO_DL_URL;/mirror/sources/linux-2.6.19.2.tar.bz2
.. image:: figures/sched-wakeup-profile.png
:align: center
@ -648,7 +648,7 @@ applicable to our workload::
root@crownbay:~# perf record -g -e skb:* -e net:* -e napi:* -e sched:sched_switch -e sched:sched_wakeup -e irq:*
-e syscalls:sys_enter_read -e syscalls:sys_exit_read -e syscalls:sys_enter_write -e syscalls:sys_exit_write
wget https://downloads.yoctoproject.org/mirror/sources/linux-2.6.19.2.tar.bz2
wget &YOCTO_DL_URL;/mirror/sources/linux-2.6.19.2.tar.bz2
We can look at the raw trace output using 'perf script' with no
arguments::
@ -885,7 +885,7 @@ To demonstrate this, open up one window and start the profile using the
In another window, run the wget test::
root@crownbay:~# wget https://downloads.yoctoproject.org/mirror/sources/linux-2.6.19.2.tar.bz2
root@crownbay:~# wget &YOCTO_DL_URL;/mirror/sources/linux-2.6.19.2.tar.bz2
Connecting to downloads.yoctoproject.org (140.211.169.59:80)
linux-2.6.19.2.tar.b 100% \|*******************************\| 41727k 0:00:00 ETA
@ -2251,7 +2251,7 @@ of the block device you want to trace activity on::
In another shell, execute a workload you want to trace. ::
root@crownbay:/media/sdc# rm linux-2.6.19.2.tar.bz2; wget https://downloads.yoctoproject.org/mirror/sources/linux-2.6.19.2.tar.bz2; sync
root@crownbay:/media/sdc# rm linux-2.6.19.2.tar.bz2; wget &YOCTO_DL_URL;/mirror/sources/linux-2.6.19.2.tar.bz2; sync
Connecting to downloads.yoctoproject.org (140.211.169.59:80)
linux-2.6.19.2.tar.b 100% \|*******************************\| 41727k 0:00:00 ETA
@ -2420,7 +2420,7 @@ On the target system, you should see this::
In another shell, execute a workload you want to trace. ::
root@crownbay:/media/sdc# rm linux-2.6.19.2.tar.bz2; wget https://downloads.yoctoproject.org/mirror/sources/linux-2.6.19.2.tar.bz2; sync
root@crownbay:/media/sdc# rm linux-2.6.19.2.tar.bz2; wget &YOCTO_DL_URL;/mirror/sources/linux-2.6.19.2.tar.bz2; sync
Connecting to downloads.yoctoproject.org (140.211.169.59:80)
linux-2.6.19.2.tar.b 100% \|*******************************\| 41727k 0:00:00 ETA

16
documentation/ref-manual/faq.rst
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@ -302,10 +302,10 @@ attempt before any others by adding something like the following to the
``local.conf`` configuration file::
PREMIRRORS:prepend = "\
git://.*/.* https://downloads.yoctoproject.org/mirror/sources/ \n \
ftp://.*/.* https://downloads.yoctoproject.org/mirror/sources/ \n \
http://.*/.* https://downloads.yoctoproject.org/mirror/sources/ \n \
https://.*/.* https://downloads.yoctoproject.org/mirror/sources/ \n"
git://.*/.* &YOCTO_DL_URL;/mirror/sources/ \n \
ftp://.*/.* &YOCTO_DL_URL;/mirror/sources/ \n \
http://.*/.* &YOCTO_DL_URL;/mirror/sources/ \n \
https://.*/.* &YOCTO_DL_URL;/mirror/sources/ \n"
These changes cause the build system to intercept Git, FTP, HTTP, and
HTTPS requests and direct them to the ``http://`` sources mirror. You
@ -342,10 +342,10 @@ You could make the following changes to the ``local.conf`` configuration
file as long as the :term:`PREMIRRORS` server is current::
PREMIRRORS:prepend = "\
git://.*/.* https://downloads.yoctoproject.org/mirror/sources/ \n \
ftp://.*/.* https://downloads.yoctoproject.org/mirror/sources/ \n \
http://.*/.* https://downloads.yoctoproject.org/mirror/sources/ \n \
https://.*/.* https://downloads.yoctoproject.org/mirror/sources/ \n"
git://.*/.* &YOCTO_DL_URL;/mirror/sources/ \n \
ftp://.*/.* &YOCTO_DL_URL;/mirror/sources/ \n \
http://.*/.* &YOCTO_DL_URL;/mirror/sources/ \n \
https://.*/.* &YOCTO_DL_URL;/mirror/sources/ \n"
BB_FETCH_PREMIRRORONLY = "1"
These changes would cause the build system to successfully fetch source

8
documentation/ref-manual/variables.rst
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@ -5855,10 +5855,10 @@ system and gives an overview of their function and contents.
:term:`Build Directory`::
PREMIRRORS:prepend = "\
git://.*/.* https://downloads.yoctoproject.org/mirror/sources/ \n \
ftp://.*/.* https://downloads.yoctoproject.org/mirror/sources/ \n \
http://.*/.* https://downloads.yoctoproject.org/mirror/sources/ \n \
https://.*/.* https://downloads.yoctoproject.org/mirror/sources/ \n"
git://.*/.* &YOCTO_DL_URL;/mirror/sources/ \n \
ftp://.*/.* &YOCTO_DL_URL;/mirror/sources/ \n \
http://.*/.* &YOCTO_DL_URL;/mirror/sources/ \n \
https://.*/.* &YOCTO_DL_URL;/mirror/sources/ \n"
These changes cause the
build system to intercept Git, FTP, HTTP, and HTTPS requests and