memory: 5568K
[0.402442] Run /sbin/init as init process
With this fix, the above delay can be eliminated.
Fixes: 1a7b7d922081 ("modules: Use vmalloc special flag")
Signed-off-by: Changbin Du
Cc: Xiaoyi Su
Cc: Eric Chanudet
Cc: Luis Chamberlain
Tested-by: Eric Chanudet
---
v4:
-
Sat, Feb 17, 2024 at 04:18:10PM +0800, Changbin Du wrote:
> > The synchronization here is just to ensure the module init's been freed
> > before doing W+X checking.
>
> Some nits, this should read instead:
>
> Fix the ordering of freeing of a module init so that it ha
EEMPT_RT kernel.
[0.291444] Freeing unused kernel memory: 5568K
[0.402442] Run /sbin/init as init process
With this fix, the above delay can be eliminated.
Fixes: 1a7b7d922081 ("modules: Use vmalloc special flag")
Signed-off-by: Changbin Du
Cc: Xiaoyi Su
Cc: Eric Chanudet
---
On Thu, Feb 15, 2024 at 09:18:09AM -0500, Eric Chanudet wrote:
> On Tue, Jan 30, 2024 at 06:21:03AM -0800, Luis Chamberlain wrote:
> > On Tue, Jan 30, 2024 at 09:40:38AM +0800, Changbin Du wrote:
> > > On Mon, Jan 29, 2024 at 09:53:58AM -0800, Luis Chamberlain wrote:
> >
On Mon, Jan 29, 2024 at 09:53:58AM -0800, Luis Chamberlain wrote:
> On Mon, Jan 29, 2024 at 10:03:04AM +0800, Changbin Du wrote:
> > The commit 1a7b7d922081 ("modules: Use vmalloc special flag") moves
> > do_free_init() into a global workqueue instead of call_rcu(). So
e positive reports in
W+X checking, and rcu synchronization is unnecessary.
Fixes: 1a7b7d922081 ("modules: Use vmalloc special flag")
Signed-off-by: Changbin Du
Cc: Xiaoyi Su
---
v2: fix compilation issue for no CONFIG_MODULES found by 0-DAY.
---
include/linux/moduleloader.h | 8 +
e positive reports in
W+X checking.
Fixes: 1a7b7d922081 ("modules: Use vmalloc special flag")
Signed-off-by: Changbin Du
Cc: Xiaoyi Su
---
v2: fix compilation issue for no CONFIG_MODULES found by 0-DAY.
---
include/linux/moduleloader.h | 8
init/main.c | 5 +++--
On Thu, Dec 21, 2023 at 10:30:37AM +0800, Changbin Du wrote:
> On Wed, Dec 20, 2023 at 06:32:39AM -0800, Luis Chamberlain wrote:
> > On Wed, Dec 20, 2023 at 01:27:51PM +0800, Changbin Du wrote:
> > > On Tue, Dec 19, 2023 at 01:52:03PM -0800, Luis Chamberlain wrote:
> > >
On Wed, Dec 20, 2023 at 06:32:39AM -0800, Luis Chamberlain wrote:
> On Wed, Dec 20, 2023 at 01:27:51PM +0800, Changbin Du wrote:
> > On Tue, Dec 19, 2023 at 01:52:03PM -0800, Luis Chamberlain wrote:
> > > On Tue, Dec 19, 2023 at 12:51:51PM -0800, Andrew Morton wrote:
> > &g
On Tue, Dec 19, 2023 at 01:52:03PM -0800, Luis Chamberlain wrote:
> On Tue, Dec 19, 2023 at 12:51:51PM -0800, Andrew Morton wrote:
> > On Tue, 19 Dec 2023 22:12:31 +0800 Changbin Du
> > wrote:
> >
> > > The commit 1a7b7d922081 ("modules: Use vmalloc spec
The commit 1a7b7d922081 ("modules: Use vmalloc special flag") moves
do_free_init() into a global workqueue instead of call_rcu(). So now
we should wait it via flush_work().
Fixes: 1a7b7d922081 ("modules: Use vmalloc special flag")
Signed-off-by: Changbin Du
Cc: Xiaoyi Su
b9de4d5b ]---
[ 104.647444] [ cut here ]
Signed-off-by: Changbin Du
---
arch/riscv/kernel/patch.c | 13 ++---
1 file changed, 6 insertions(+), 7 deletions(-)
diff --git a/arch/riscv/kernel/patch.c b/arch/riscv/kernel/patch.c
index 0b552873a577..6d2ed9c15065 100644
--- a/ar
On Wed, Mar 24, 2021 at 10:52:30AM -0600, Rob Herring wrote:
> On Wed, Mar 24, 2021 at 9:04 AM Changbin Du wrote:
> >
> > The setup_arch() would invoke unflatten_device_tree() even no
> > valid fdt found. So we'd better check it first and return early.
> >
On Wed, Mar 24, 2021 at 08:51:06PM +0530, Anup Patel wrote:
> On Wed, Mar 24, 2021 at 8:33 PM Changbin Du wrote:
> >
> > In the setup_arch() of riscv, function early_init_dt_verify() has
> > been done by parse_dtb(). So no need to call it again. Just directly
> > i
The setup_arch() would invoke unflatten_device_tree() even no
valid fdt found. So we'd better check it first and return early.
Signed-off-by: Changbin Du
---
drivers/of/fdt.c | 5 +
1 file changed, 5 insertions(+)
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index dcc1dd9
In the setup_arch() of riscv, function early_init_dt_verify() has
been done by parse_dtb(). So no need to call it again. Just directly
invoke unflatten_device_tree().
Signed-off-by: Changbin Du
---
arch/riscv/kernel/setup.c | 5 +
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a
setup_arch() would invoke efi_init()->efi_get_fdt_params(). If no
valid fdt found then initial_boot_params will be null. So we
should stop further fdt processing here. I encountered this
issue on risc-v.
Signed-off-by: Changbin Du
---
drivers/firmware/efi/fdtparams.c | 3 +++
1 file changed
On Tue, Mar 16, 2021 at 02:53:41PM +0100, Jiri Olsa wrote:
> On Mon, Mar 15, 2021 at 10:30:47PM +0800, Changbin Du wrote:
>
> SNIP
>
> > diff --git a/tools/perf/util/stat-shadow.c b/tools/perf/util/stat-shadow.c
> > index 6ccf21a72f06..3f800e71126f 100644
> > --- a
sses #8.47% of all branches
2.002040043 seconds time elapsed
Signed-off-by: Changbin Du
v2:
o do not change 'sec' to 'cpu-sec'.
o use convert_unit_double to implement convert_unit.
---
tools/perf/util/stat-shadow.c | 16 ++
sses #8.47% of all branches
2.002040043 seconds time elapsed
Signed-off-by: Changbin Du
v2:
o do not change 'sec' to 'cpu-sec'.
o use convert_unit_double to implement convert_unit.
---
tools/perf/util/stat-shadow.c | 16 ++
On Tue, Mar 02, 2021 at 09:25:24AM -0300, Arnaldo Carvalho de Melo wrote:
> Em Tue, Mar 02, 2021 at 11:08:40AM +0900, Namhyung Kim escreveu:
> > On Tue, Mar 2, 2021 at 4:19 AM Jiri Olsa wrote:
> > >
> > > On Tue, Mar 02, 2021 at 01:24:02AM +0800, Changbin Du wrote:
&
On Mon, Mar 01, 2021 at 08:19:20PM +0100, Jiri Olsa wrote:
> On Tue, Mar 02, 2021 at 01:24:02AM +0800, Changbin Du wrote:
> > This does follow two changes:
> > 1) Select appropriate unit between K/M/G.
> > 2) Use 'cpu-sec' instead of 'sec' to state t
#1.49 stalled cycles per
insn (83.41%)
2,063,251,998 branches # 257.803 M/cpu-sec
(83.41%)
86,941,704 branch-misses #4.21% of all branches
(83.30%)
2.001743706 seconds time elapsed
Signed-off-by: Ch
riscv: implement __get_kernel_nofault and
__put_user_nofault")
Signed-off-by: Changbin Du
Cc: Christoph Hellwig
---
arch/riscv/include/asm/uaccess.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/riscv/include/asm/uaccess.h b/arch/riscv/include/asm/uaccess.h
index c47e
On Fri, Sep 04, 2020 at 03:59:59PM -0300, Arnaldo Carvalho de Melo wrote:
> Em Fri, Sep 04, 2020 at 01:27:16PM -0300, Arnaldo Carvalho de Melo escreveu:
> > Em Fri, Sep 04, 2020 at 11:23:57PM +0800, Changbin Du escreveu:
> > > Same as 'perf probe -F', this patch adds f
open
vfs_setpos
vfs_llseek
vfs_readf
vfs_writef
...
Suggested-by: Arnaldo Carvalho de Melo
Signed-off-by: Changbin Du
---
tools/perf/Documentation/perf-ftrace.txt | 3 +-
tools/perf/builtin-ftrace.c | 84 ++--
2 files changed, 80 insertions(+), 7 deletions(-)
diff -
This moves the KCSAN kconfig items under menu 'Generic Kernel Debugging
Instruments' where UBSAN resides.
Signed-off-by: Changbin Du
---
lib/Kconfig.debug | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index e0
t;perldoc perl". If you have access to the
Internet, point your browser at http://www.perl.org/, the Perl Home Page.
>
> Changing email address for Changbin.
> Plus I made the quick patch for streamline_config.pl (below)
> although I haven't tested it.
>
> ---
> F
open
vfs_setpos
vfs_llseek
vfs_readf
vfs_writef
...
Suggested-by: Arnaldo Carvalho de Melo
Signed-off-by: Changbin Du
---
tools/perf/Documentation/perf-ftrace.txt | 3 +-
tools/perf/builtin-ftrace.c | 84 ++--
2 files changed, 80 insertions(+), 7 deletions(-)
diff -
On Fri, Aug 14, 2020 at 08:35:35AM -0300, Arnaldo Carvalho de Melo wrote:
> Em Sat, Aug 08, 2020 at 10:31:25AM +0800, Changbin Du escreveu:
> > This adds an option '-F/--funcs' to list all available functions to trace,
> > which is read from tracing file &#
On Fri, Aug 14, 2020 at 09:24:40AM -0300, Arnaldo Carvalho de Melo wrote:
> Em Sat, Aug 08, 2020 at 10:31:31AM +0800, Changbin Du escreveu:
> > This adds support to display call trace for function tracer. To do this,
> > just specify a '--func-opts call-graph' option.
On Fri, Aug 14, 2020 at 09:28:07AM -0300, Arnaldo Carvalho de Melo wrote:
> Em Sat, Aug 08, 2020 at 10:31:34AM +0800, Changbin Du escreveu:
> > This adds support to display irq context info for function tracer. To do
> > this, just specify a '--func-opts irq-info' option.
On Fri, Aug 14, 2020 at 09:33:10AM -0300, Arnaldo Carvalho de Melo wrote:
> Em Sat, Aug 08, 2020 at 10:31:36AM +0800, Changbin Du escreveu:
> > This adds an option '--graph-opts thresh' to setup trace duration
> > threshold for funcgraph tracer.
>
> Applied, pleas
Add a change log after previous enhancements.
Signed-off-by: Changbin Du
---
tools/perf/builtin-ftrace.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c
index 9da38dc8b542..167f1f57aba3 100644
--- a/tools/perf/builtin-ftrace.c
+++ b
This adds an option '-D/--delay' to allow us to start tracing some
times later after workload is launched.
Signed-off-by: Changbin Du
---
tools/perf/Documentation/perf-ftrace.txt | 4
tools/perf/builtin-ftrace.c | 19 ---
2 files changed, 20 insert
Now the __cmd_ftrace() becomes a bit long. This moves the trace
option setting code to a separate function set_tracing_options().
Suggested-by: Namhyung Kim
Signed-off-by: Changbin Du
---
tools/perf/builtin-ftrace.c | 118 +++-
1 file changed, 63 insertions
This adds an option '--graph-opts nosleep-time' which allow us
only to measure on-CPU time. This option is function_graph tracer
only.
Signed-off-by: Changbin Du
---
v3: switch to uniform option --graph-opts.
v2: option name '--nosleep-time' -> '--graph-no
schedule_idle */
2) # 4140.051 us | } /* do_idle */
Signed-off-by: Changbin Du
---
tools/perf/Documentation/perf-ftrace.txt | 1 +
tools/perf/builtin-ftrace.c | 26 +++-
2 files changed, 26 insertions(+), 1 deletion(-)
diff --git a/tools/perf/Documentation/perf-ftra
This is to have a consistent view of all graph tracer options.
The original option '--graph-depth' is marked as deprecated.
Signed-off-by: Changbin Du
---
tools/perf/Documentation/perf-ftrace.txt | 5 +
tools/perf/builtin-ftrace.c | 5 ++---
2 files changed, 3 insert
This adds support to display irq context info for function tracer. To do
this, just specify a '--func-opts irq-info' option.
Signed-off-by: Changbin Du
---
tools/perf/Documentation/perf-ftrace.txt | 1 +
tools/perf/builtin-ftrace.c | 21 -
2 files c
.328 us| __sb_end_write();
14160.770888 | 0) <...>-47814 | d... | 0.430 us|
fpregs_assert_state_consistent();
14160.770889 | 0) <...>-47814 | d... | | do_syscall_64() {
14160.770889 | 0) <...>-47814 | .... | |
__
This factors out a general function perf_parse_sublevel_options() to parse
sublevel options. The 'sublevel' options is something like the '--debug'
options which allow more sublevel options.
Signed-off-by: Changbin Du
---
v2: add util/parse-sublevel-options.c
---
t
This adds an option '--graph-opts noirqs' to filter out functions executed
in irq context.
Signed-off-by: Changbin Du
---
v2: option name '--nofuncgraph-irqs' -> '--graph-noirqs'.
---
tools/perf/Documentation/perf-ftrace.txt | 1 +
tools/perf/b
=> vfs_read
=> ksys_read
=> __x64_sys_read
=> do_syscall_64
=> entry_SYSCALL_64_after_hwframe
...
Signed-off-by: Changbin Du
---
v3: switch to uniform option --func-opts.
v2: option name '-s' -> '--func-call-graph'
---
tools/perf/Documentation/pe
This allows us to trace single thread instead of the whole process.
Signed-off-by: Changbin Du
---
tools/perf/Documentation/perf-ftrace.txt | 3 +++
tools/perf/builtin-ftrace.c | 3 +++
2 files changed, 6 insertions(+)
diff --git a/tools/perf/Documentation/perf-ftrace.txt
b/tools
This adds an option '--inherit' to allow us trace children
processes spawned by our target.
Signed-off-by: Changbin Du
---
v2: option name '--trace-children' -> '--inherit'.
---
tools/perf/Documentation/perf-ftrace.txt | 3 ++
tools/perf/b
This adds an option '-m/--buffer-size' to allow us set the size of per-cpu
tracing buffer.
Signed-off-by: Changbin Du
---
v2: support units as a suffix.
---
tools/perf/Documentation/perf-ftrace.txt | 5 +++
tools/perf/builtin-ftrace.c | 55 +++
We will reuse this function later.
Signed-off-by: Changbin Du
---
tools/perf/builtin-ftrace.c | 17 -
1 file changed, 12 insertions(+), 5 deletions(-)
diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c
index 1ebf71ecc1a8..4b3fcee5725a 100644
--- a/tools/perf
_write
<...>-9246 [006] 10726.262767: fpregs_assert_state_consistent
<-do_syscall_64
Signed-off-by: Changbin Du
---
tools/perf/builtin-ftrace.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c
index a3a4f
tart tracing all functions using default tracer:
$ sudo perf ftrace
This will trace all functions using function graph tracer:
$ sudo perf ftrace -G '*'
This will trace function vfs_read using function graph tracer:
$ sudo perf ftrace -G vfs_read
This will trace function vfs_rea
update all related perf documentation.
o rename some options. Now all funcgraph tracer options are prefixed with
'--graph-', while all function tracer options are prefixed with '--func-'.
o mark old options deprecated instead of removing them.
Acked-by: Namhyung K
_cb
run_init_process
try_to_run_init_process
match_dev_by_label
match_dev_by_uuid
rootfs_init_fs_context
Signed-off-by: Changbin Du
---
v3: fix return value issue.
v2: option name '-l/--list-functions' -> '-F/--funcs'
---
tools/perf/Documentation/perf-ftrace.txt | 4 +++
to
On Wed, Aug 05, 2020 at 10:05:03PM -0300, Arnaldo Carvalho de Melo wrote:
>
>
> On August 5, 2020 9:14:48 PM GMT-03:00, Changbin Du
> wrote:
> >On Tue, Aug 04, 2020 at 09:51:15AM -0300, Arnaldo Carvalho de Melo
> >wrote:
> >> Em Sat, Jul 18, 2020 at 02:48
On Tue, Aug 04, 2020 at 09:51:15AM -0300, Arnaldo Carvalho de Melo wrote:
> Em Sat, Jul 18, 2020 at 02:48:09PM +0800, Changbin Du escreveu:
> > The '-g/-G' options have already implied function_graph tracer should be
> > used instead of function tracer. So the extra
Hi Arnaldo,
Are we ready to merge this serias now? Thanks. :)
On Sat, Jul 18, 2020 at 02:48:08PM +0800, Changbin Du wrote:
> The perf has basic kernel ftrace support but lack support of most tracing
> options. This serias is target to enhance the perf ftrace functionality so
> that we
On Fri, Jul 17, 2020 at 11:05:04AM -0400, Steven Rostedt wrote:
> On Sat, 11 Jul 2020 20:40:20 +0800
> Changbin Du wrote:
>
> > This adds an option '-F/--funcs' to list all available functions to trace,
> > which is read from tracing file 'available_filte
Add a change log after previous enhancements.
Signed-off-by: Changbin Du
---
tools/perf/builtin-ftrace.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c
index 4551d4d4bcc5..9213fb9777c4 100644
--- a/tools/perf/builtin-ftrace.c
+++ b
Now the __cmd_ftrace() becomes a bit long. This moves the trace
option setting code to a separate function set_tracing_options().
Suggested-by: Namhyung Kim
Signed-off-by: Changbin Du
---
tools/perf/builtin-ftrace.c | 118 +++-
1 file changed, 63 insertions
schedule_idle */
2) # 4140.051 us | } /* do_idle */
Signed-off-by: Changbin Du
---
tools/perf/Documentation/perf-ftrace.txt | 1 +
tools/perf/builtin-ftrace.c | 26 +++-
2 files changed, 26 insertions(+), 1 deletion(-)
diff --git a/tools/perf/Documentation/perf-ftra
This allows us to trace single thread instead of the whole process.
Signed-off-by: Changbin Du
---
tools/perf/Documentation/perf-ftrace.txt | 3 +++
tools/perf/builtin-ftrace.c | 3 +++
2 files changed, 6 insertions(+)
diff --git a/tools/perf/Documentation/perf-ftrace.txt
b/tools
.328 us| __sb_end_write();
14160.770888 | 0) <...>-47814 | d... | 0.430 us|
fpregs_assert_state_consistent();
14160.770889 | 0) <...>-47814 | d... | | do_syscall_64() {
14160.770889 | 0) <...>-47814 | .... | |
__
This adds an option '-D/--delay' to allow us to start tracing some
times later after workload is launched.
Signed-off-by: Changbin Du
---
tools/perf/Documentation/perf-ftrace.txt | 4
tools/perf/builtin-ftrace.c | 19 ---
2 files changed, 20 insert
This is to have a consistent view of all graph tracer options.
The original option '--graph-depth' is marked as deprecated.
Signed-off-by: Changbin Du
---
tools/perf/Documentation/perf-ftrace.txt | 5 +
tools/perf/builtin-ftrace.c | 5 ++---
2 files changed, 3 insert
This adds an option '--inherit' to allow us trace children
processes spawned by our target.
Signed-off-by: Changbin Du
---
v2: option name '--trace-children' -> '--inherit'.
---
tools/perf/Documentation/perf-ftrace.txt | 3 ++
tools/perf/b
This factors out a general function perf_parse_sublevel_options() to parse
sublevel options. The 'sublevel' options is something like the '--debug'
options which allow more sublevel options.
Signed-off-by: Changbin Du
---
v2: add util/parse-sublevel-options.c
---
t
=> vfs_read
=> ksys_read
=> __x64_sys_read
=> do_syscall_64
=> entry_SYSCALL_64_after_hwframe
...
Signed-off-by: Changbin Du
---
v3: switch to uniform option --func-opts.
v2: option name '-s' -> '--func-call-graph'
---
tools/perf/Documentation/pe
This adds support to display irq context info for function tracer. To do
this, just specify a '--func-opts irq-info' option.
Signed-off-by: Changbin Du
---
tools/perf/Documentation/perf-ftrace.txt | 1 +
tools/perf/builtin-ftrace.c | 21 -
2 files c
This adds an option '--graph-opts nosleep-time' which allow us
only to measure on-CPU time. This option is function_graph tracer
only.
Signed-off-by: Changbin Du
---
v3: switch to uniform option --graph-opts.
v2: option name '--nosleep-time' -> '--graph-no
This adds an option '--graph-opts noirqs' to filter out functions executed
in irq context.
Signed-off-by: Changbin Du
---
v2: option name '--nofuncgraph-irqs' -> '--graph-noirqs'.
---
tools/perf/Documentation/perf-ftrace.txt | 1 +
tools/perf/b
We will reuse this function later.
Signed-off-by: Changbin Du
---
tools/perf/builtin-ftrace.c | 17 -
1 file changed, 12 insertions(+), 5 deletions(-)
diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c
index 3c0e60fdfe0f..9abf97c29cb6 100644
--- a/tools/perf
This adds an option '-m/--buffer-size' to allow us set the size of per-cpu
tracing buffer.
Signed-off-by: Changbin Du
---
v2: support units as a suffix.
---
tools/perf/Documentation/perf-ftrace.txt | 5 +++
tools/perf/builtin-ftrace.c | 56 +++
_cb
run_init_process
try_to_run_init_process
match_dev_by_label
match_dev_by_uuid
rootfs_init_fs_context
Signed-off-by: Changbin Du
---
v3: fix return value issue.
v2: option name '-l/--list-functions' -> '-F/--funcs'
---
tools/perf/Documentation/perf-ftrace.txt | 4 +++
to
_write
<...>-9246 [006] 10726.262767: fpregs_assert_state_consistent
<-do_syscall_64
Signed-off-by: Changbin Du
---
tools/perf/builtin-ftrace.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c
index 3ea3a
e
This will trace all functions using function graph tracer:
$ sudo perf ftrace -G '*'
This will trace function vfs_read using function graph tracer:
$ sudo perf ftrace -G vfs_read
Signed-off-by: Changbin Du
---
v3: remove default '*' for -G/-T.
---
tools/perf/Documen
o rename some options. Now all funcgraph tracer options are prefixed with
'--graph-', while all function tracer options are prefixed with '--func-'.
o mark old options deprecated instead of removing them.
Changbin Du (18):
perf ftrace: select function/function_graph tr
On Fri, Jul 17, 2020 at 01:01:24PM -0400, Steven Rostedt wrote:
> On Fri, 17 Jul 2020 21:26:50 +0800
> Changbin Du wrote:
>
> > On Thu, Jul 16, 2020 at 12:36:30PM -0300, Arnaldo Carvalho de Melo wrote:
> > > Em Sat, Jul 11, 2020 at 08:40:21PM +0800, Changbin Du escreveu:
.328 us| __sb_end_write();
14160.770888 | 0) <...>-47814 | d... | 0.430 us|
fpregs_assert_state_consistent();
14160.770889 | 0) <...>-47814 | d... | | do_syscall_64() {
14160.770889 | 0) <...>-47814 | .... | |
__
schedule_idle */
2) # 4140.051 us | } /* do_idle */
Signed-off-by: Changbin Du
---
tools/perf/Documentation/perf-ftrace.txt | 1 +
tools/perf/builtin-ftrace.c | 26 +++-
2 files changed, 26 insertions(+), 1 deletion(-)
diff --git a/tools/perf/Documentation/perf-ftra
This is to have a consistent view of all graph tracer options.
The original option '--graph-depth' is marked as deprecated.
Signed-off-by: Changbin Du
---
tools/perf/Documentation/perf-ftrace.txt | 5 +
tools/perf/builtin-ftrace.c | 5 ++---
2 files changed, 3 insert
Now the __cmd_ftrace() becomes a bit long. This moves the trace
option setting code to a separate function set_tracing_options().
Suggested-by: Namhyung Kim
Signed-off-by: Changbin Du
---
tools/perf/builtin-ftrace.c | 118 +++-
1 file changed, 63 insertions
This adds an option '-D/--delay' to allow us to start tracing some
times later after workload is launched.
Signed-off-by: Changbin Du
---
tools/perf/Documentation/perf-ftrace.txt | 4
tools/perf/builtin-ftrace.c | 19 ---
2 files changed, 20 insert
Add a change log after previous enhancements.
Signed-off-by: Changbin Du
---
tools/perf/builtin-ftrace.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c
index edf307f7d716..326fd03396d5 100644
--- a/tools/perf/builtin-ftrace.c
+++ b
This adds an option '--graph-opts noirqs' to filter out functions executed
in irq context.
Signed-off-by: Changbin Du
---
v2: option name '--nofuncgraph-irqs' -> '--graph-noirqs'.
---
tools/perf/Documentation/perf-ftrace.txt | 1 +
tools/perf/b
This adds an option '--graph-opts nosleep-time' which allow us
only to measure on-CPU time. This option is function_graph tracer
only.
Signed-off-by: Changbin Du
---
v3: switch to uniform option --graph-opts.
v2: option name '--nosleep-time' -> '--graph-no
This adds an option '--inherit' to allow us trace children
processes spawned by our target.
Signed-off-by: Changbin Du
---
v2: option name '--trace-children' -> '--inherit'.
---
tools/perf/Documentation/perf-ftrace.txt | 3 ++
tools/perf/b
This adds support to display irq context info for function tracer. To do
this, just specify a '--func-opts irq-info' option.
Signed-off-by: Changbin Du
---
tools/perf/Documentation/perf-ftrace.txt | 1 +
tools/perf/builtin-ftrace.c | 21 -
2 files c
_write
<...>-9246 [006] 10726.262767: fpregs_assert_state_consistent
<-do_syscall_64
Signed-off-by: Changbin Du
---
tools/perf/builtin-ftrace.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c
index 3ea3a
This factors out a general function perf_parse_sublevel_options() to parse
sublevel options. The 'sublevel' options is something like the '--debug'
options which allow more sublevel options.
Signed-off-by: Changbin Du
---
v2: add util/parse-sublevel-options.c
---
t
=> vfs_read
=> ksys_read
=> __x64_sys_read
=> do_syscall_64
=> entry_SYSCALL_64_after_hwframe
...
Signed-off-by: Changbin Du
---
v3: switch to uniform option --func-opts.
v2: option name '-s' -> '--func-call-graph'
---
tools/perf/Documentation/pe
We will reuse this function later.
Signed-off-by: Changbin Du
---
tools/perf/builtin-ftrace.c | 17 -
1 file changed, 12 insertions(+), 5 deletions(-)
diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c
index 3c0e60fdfe0f..9abf97c29cb6 100644
--- a/tools/perf
This adds an option '-m/--buffer-size' to allow us set the size of per-cpu
tracing buffer.
Signed-off-by: Changbin Du
---
v2: support units as a suffix.
---
tools/perf/Documentation/perf-ftrace.txt | 5 +++
tools/perf/builtin-ftrace.c | 56 +++
e all function tracer options are prefixed with '--func-'.
o mark old options deprecated instead of removing them.
Changbin Du (17):
perf ftrace: select function/function_graph tracer automatically
perf ftrace: add option '-F/--funcs' to list available functions
perf ftr
_cb
run_init_process
try_to_run_init_process
match_dev_by_label
match_dev_by_uuid
rootfs_init_fs_context
Signed-off-by: Changbin Du
---
v3: fix return value issue.
v2: option name '-l/--list-functions' -> '-F/--funcs'
---
tools/perf/Documentation/perf-ftrace.txt | 4 +++
to
e
This will trace all functions using function graph tracer:
$ sudo perf ftrace -G '*'
This will trace function vfs_read using function graph tracer:
$ sudo perf ftrace -G vfs_read
Signed-off-by: Changbin Du
---
v3: remove default '*' for -G/-T.
---
tools/perf/Documen
e
This will trace all functions using function graph tracer:
$ sudo perf ftrace -G '*'
This will trace function vfs_read using function graph tracer:
$ sudo perf ftrace -G vfs_read
Signed-off-by: Changbin Du
---
v3: remove default '*' for -G/-T.
---
tools/perf/Documen
e all function tracer options are prefixed with '--func-'.
o mark old options deprecated instead of removing them.
Changbin Du (17):
perf ftrace: select function/function_graph tracer automatically
perf ftrace: add option '-F/--funcs' to list available functions
perf ftr
On Mon, Jul 13, 2020 at 10:59:56AM +0900, Namhyung Kim wrote:
> On Sat, Jul 11, 2020 at 9:42 PM Changbin Du wrote:
> >
> > This adds an option '--inherit' to allow us trace children
> > processes spawned by our target.
> >
> > Signed-off-by: Changbin D
On Mon, Jul 13, 2020 at 11:07:56AM +0900, Namhyung Kim wrote:
> On Sat, Jul 11, 2020 at 9:43 PM Changbin Du wrote:
> >
> > Sometimes we want ftrace display more and longer information about
> > the trace.
> >
> > $ sudo perf ftrace -G
> > 2) 0.979 us
On Mon, Jul 13, 2020 at 10:49:40AM +0900, Namhyung Kim wrote:
> Hello,
>
> On Sat, Jul 11, 2020 at 9:42 PM Changbin Du wrote:
> >
> > This adds an option '-F/--funcs' to list all available functions to trace,
> > which is read from tracing file 'availabl
On Thu, Jul 16, 2020 at 12:36:30PM -0300, Arnaldo Carvalho de Melo wrote:
> Em Sat, Jul 11, 2020 at 08:40:21PM +0800, Changbin Du escreveu:
> > This allows us to trace single thread instead of the whole process.
> >
> > Signed-off-by: Changbin Du
> > ---
> &g
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