3rd-party/linux-kernel-module-cheat
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OK, direct the annoying traces to the output folder

Browse Source 
Otherwise it was getting messy to distinguish between trace-events
and trace-<pid> in the .gitignore.

Now only the latest trace will be kept, with a fixed name.
This commit is contained in:
Ciro Santilli
2018-03-28 23:06:45 +01:00
parent f74e001789
commit 01a84e7f79
5 changed files with 64 additions and 55 deletions
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1
.gitignore vendored
View File

@@ -9,7 +9,6 @@ gitignore*
# Specific files.
/9p
/README.html
/trace-[0-9]*
# GEM5
/m5out

44
build-usage.adoc
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@@ -8,28 +8,28 @@
[options="header"]
|===
|Name |Argument name | Description
|`-a` |`ARCH` | Build for architecture `ARCH`.
|`-b` |`BR2_FILE` | Also use the given Buildroot configuration fragment file.
Pass multiple times to use multiple fragment files.
|`-B` |`BR2_CONFIG` | Add a single Buildroot option to the current build.
Example: `-B 'BR2_TARGET_ROOTFS_EXT2_SIZE="512M"'`
|`-c` |`BR2_FILE` | Also use the given Buildroot configuration fragment file.
Pass multiple times to use multiple fragment files.
|`-C` | | Skip the Buildroot configuration. Saves a few seconds,
but requires you to know what you are doing :-)
|`-g` | | Enable gem5 build and disable QEMU build. You also need
to use `-G` or `-- gem5-reconfigure` to rebuild gem5
after the initial build.
|`-h` | | Show this help message.
|`-I` | | Enable initramfs for the current build.
|`-i` | | Enable initrd for the current build.
|`-K` |`KERNEL_CONFIG_FILE` | Use `KERNEL_CONFIG_FILE` as the exact Linux kernel
configuration. Ignore the default `kernel_config_fragment`.
|`-p` | | Pass extra arguments to the `rootfs_post_build_script`.
|`-S` | | Don't build QEMU with SDL support.
Graphics such as X11 won't work, only the terminal.
|`-v` | | Do a verbose build.
|Name |Argument name |Description
|`-a` |`ARCH` |Build for architecture `ARCH`.
|`-b` |`BR2_FILE` |Also use the given Buildroot configuration fragment file.
Pass multiple times to use multiple fragment files.
|`-B` |`BR2_CONFIG` |Add a single Buildroot option to the current build.
Example: `-B 'BR2_TARGET_ROOTFS_EXT2_SIZE="512M"'`
|`-c` |`BR2_FILE` |Also use the given Buildroot configuration fragment file.
Pass multiple times to use multiple fragment files.
|`-C` | |Skip the Buildroot configuration. Saves a few seconds,
but requires you to know what you are doing :-)
|`-g` | |Enable gem5 build and disable QEMU build. You also need
to use `-G` or `-- gem5-reconfigure` to rebuild gem5
after the initial build.
|`-h` | |Show this help message.
|`-I` | |Enable initramfs for the current build.
|`-i` | |Enable initrd for the current build.
|`-K` |`KERNEL_CONFIG_FILE` |Use `KERNEL_CONFIG_FILE` as the exact Linux kernel
configuration. Ignore the default `kernel_config_fragment`.
|`-p` | |Pass extra arguments to the `rootfs_post_build_script`.
|`-S` | |Don't build QEMU with SDL support.
Graphics such as X11 won't work, only the terminal.
|`-v` | |Do a verbose build.
|===
== build target options

7
run
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@@ -25,7 +25,8 @@ initramfs=false
memory=256M
nographic=true
root=''
while getopts a:c:DdE:e:f:G:ghIiKkm:x OPT; do
trace_enable=''
while getopts a:c:DdE:e:f:G:ghIiKkm:T:x OPT; do
case "$OPT" in
a)
arch="$OPTARG"
@@ -78,6 +79,9 @@ while getopts a:c:DdE:e:f:G:ghIiKkm:x OPT; do
m)
memory="$OPTARG"
;;
T)
trace_enable="$OPTARG"
;;
x)
nographic=false
;;
@@ -169,6 +173,7 @@ ${debug_vm} \
-monitor telnet::45454,server,nowait \
-netdev user,hostfwd=tcp::45455-:45455,hostfwd=tcp::45456-:22,id=net0 \
-smp ${cpus} \
-trace enable=${trace_enable},file='${lkmc_out_dir}/trace.bin' \
-virtfs local,path=9p,mount_tag=host_scratch,security_model=mapped,id=host_scratch \
-virtfs local,path=${out_dir}/build,mount_tag=host_out,security_model=mapped,id=host_out \
"

65
run-usage.adoc
View File

@@ -6,34 +6,39 @@
[options="header"]
|===
|Name |Argument name | Description
|`-a` |`ARCH` | Run architecture `ARCH`.
|`-c` |`NCPUS` | Emulate `NCPUS` guest CPUs.
|`-D` | | Run GDB on the emulator itself.
|`-d` | | Run in debug mode, expect a GDB connection to guest.
|`-E` |`CMDSTR` | Replace the normal init with a minimal init that just evals
with given `CMDSTR` bash command string. Example:
`-E 'insmod /hello.ko;'`
|`-e` |`CLI_OPTIONS` | Pass an extra Linux kernel command line options,
and place them before the dash separator `-`.
Only options that come before the `-`, i.e. "standard"
options, should be passed with this option.
Example: `./run -a arm -e 'init=/poweroff.out'`
|`-f` |`CLI_OPTIONS` | Pass an extra Linux kernel command line options,
add a dash `-` separator, and place the options after the dash.
Intended for custom options understood by our `init` scripts,
most of which are prefixed by `lkmc_`, e.g.:
`./run -f 'lkmc_eval="wget google.com" lkmc_lala=y'`
Mnenomic: comes after `-e`.
|`-G` | | Pass extra options to the gem5 executable.
Do not confuse with the arguments passed to config scripts,
like `fs.py`. Example: `./run -G '--help' -g`
|`-g` | | Use gem5 instead of QEMU.
|`-h` | | Show this help message.
|`-I` | | Run with initramfs.
|`-i` | | Run with initrd.
|`-K` | | Use KVM. Only works if guest arch == host arch.
|`-k` | | Enable KGDB.
|`-m` | | Set the memory size of the guest. E.g.: `-m 512M`. Default: `256M`.
|`-x` | | Run in graphic mode. Mnemonic: X11.
|Name |Argument name |Description
|`-a` |`ARCH` |Run architecture `ARCH`.
|`-c` |`NCPUS` |Emulate `NCPUS` guest CPUs.
|`-D` | |Run GDB on the emulator itself.
|`-d` | |Run in debug mode, expect a GDB connection to guest.
|`-E` |`CMDSTR` |Replace the normal init with a minimal init that just evals
with given `CMDSTR` bash command string. Example:
`-E 'insmod /hello.ko;'`
|`-e` |`CLI_OPTIONS` |Pass an extra Linux kernel command line options,
and place them before the dash separator `-`.
Only options that come before the `-`, i.e. "standard"
options, should be passed with this option.
Example: `./run -a arm -e 'init=/poweroff.out'`
|`-f` |`CLI_OPTIONS` |Pass an extra Linux kernel command line options,
add a dash `-` separator, and place the options after the dash.
Intended for custom options understood by our `init` scripts,
most of which are prefixed by `lkmc_`, e.g.:
`./run -f 'lkmc_eval="wget google.com" lkmc_lala=y'`
Mnenomic: comes after `-e`.
|`-G` | |Pass extra options to the gem5 executable.
Do not confuse with the arguments passed to config scripts,
like `fs.py`. Example: `./run -G '--help' -g`
|`-g` | |Use gem5 instead of QEMU.
|`-h` | |Show this help message.
|`-I` | |Run with initramfs.
|`-i` | |Run with initrd.
|`-K` | |Use KVM. Only works if guest arch == host arch.
|`-k` | |Enable KGDB.
|`-m` | |Set the memory size of the guest. E.g.: `-m 512M`. Default: `256M`.
|`-T` | |Enable extra QEMU trace events.
`./configure --enable-trace-backends=simple` seems to enable
some by default, e.g. `pr_manager_run`, and I don't know how to
get rid of them. But those events are rare and should not impact
performance, so we just ignore them for now.
|`-x` | |Run in graphic mode. Mnemonic: X11.
|===

2
trace-boot
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@@ -10,7 +10,7 @@ while getopts a: OPT; do
esac
done
set_common_vars "$arch" false
time ./run -a "$arch" -e 'init=/poweroff.out' -- -trace exec_tb,file="${lkmc_out_dir}/trace.bin"
time ./run -a "$arch" -e 'init=/poweroff.out' -T exec_tb
time ./qemu/scripts/simpletrace.py "${out_dir}/build/host-qemu-custom/trace-events-all" "${lkmc_out_dir}/trace.bin" >"${lkmc_out_dir}/trace.txt"
# Instruction count.