Hi Mathieu,
Thanks. I am looking for packages for older distributions like CentOS 6 (with
kernel 2.6) but could not find it. And which kernel version is minimum
requirement for LTTng?
Regards
Hai
-- Original --
From: "Mathieu Desnoyers";
Date: Thu, Jul 2
In the case of short lived applications, the application may exit before
the initial statedump has completed.
Higher-level trace analysis features such as translating addresses to
symbols rely on statedump. That information is required for those
analyses to work on such short-lived applications.
Hi,
Can lttng (LTTng-UST) see perf dynamic probes ?
# perf probe --list probe_libc:malloc_8
probe_libc:malloc_8 (on __libc_malloc@glibc-2.27/malloc/malloc.c in
/lib/x86_64-linux-gnu/libc-2.27.so)
# lttng list -u
UST events:
-
None
(Yes, I am doing this as root..., since libc-2
Hi,
For those at home wondering why this would be relevant to lttng,
lttng-ust comes with a utility shared object allowing you to leverage the
-finstrument-function sites to hook lttng tracepoints [1].
[1] https://lttng.org/man/3/lttng-ust-cyg-profile/v2.10/
Thanks Christophe for this contributi
> @Jonathan: This is my first time to get involved in an open-source
> project on the mailing list. I don't quite know how RFC works. Should
> I just do `git format-patch` and copy-paste the diff to an email? Is
> there any specific format for the RFC email and its title?
Copy paste to email is th
- On Jul 29, 2019, at 2:57 PM, Mathieu Desnoyers
mathieu.desnoy...@efficios.com wrote:
> - On Jul 29, 2019, at 2:55 PM, Mathieu Desnoyers
> mathieu.desnoy...@efficios.com wrote:
>
>> - On Jul 29, 2019, at 2:49 PM, Jonathan Rajotte
>> jonathan.rajotte-jul...@efficios.com wrote:
>>
- On Jul 29, 2019, at 2:55 PM, Mathieu Desnoyers
mathieu.desnoy...@efficios.com wrote:
> - On Jul 29, 2019, at 2:49 PM, Jonathan Rajotte
> jonathan.rajotte-jul...@efficios.com wrote:
>
>> Any ring buffer configuration bigger than PAGE_SIZE would result
>> in an increased latency for t
- On Jul 29, 2019, at 2:49 PM, Jonathan Rajotte
jonathan.rajotte-jul...@efficios.com wrote:
> Any ring buffer configuration bigger than PAGE_SIZE would result
> in an increased latency for the first tracepoint hit (1200ns) landing on a
> new PAGE_SIZE sized chunk of the mapped memory. This ha
Hi,
Sharing this just in case it can help someone!
gcc only lets you disable instrumentation, using the
`no_instrument_function` attribute, or by matching file names. It does not
let you explicitly choose the individual functions you want to instrument.
I've searched many times for a way to do i
Any ring buffer configuration bigger than PAGE_SIZE would result
in an increased latency for the first tracepoint hit (1200ns) landing on a
new PAGE_SIZE sized chunk of the mapped memory. This happens at least
for the first ring buffer traversal.
To alleviate this we can use MAP_POPULATE that will
- On Jul 29, 2019, at 2:41 PM, Sebastien Boisvert sboisv...@gydle.com wrote:
> nits:
>
> On 2019-07-29 2:32 p.m., Mathieu Desnoyers wrote:
>>> A similar flag seems to exists on freebsd (MAP_PREFAULT_READ) but I do
>>
>> exists -> exit
>
> exist ?
Indeed :)
>
>
>>> [1] https://lists.lttn
On 2019-07-29 2:23 p.m., Jonathan Rajotte wrote:
> Any ring buffer configuration bigger than PAGE_SIZE would result
> in increase latency for the first tracepoint hit (1200ns) lending on a
in an increased latency
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lttng-dev@l
nits:
On 2019-07-29 2:32 p.m., Mathieu Desnoyers wrote:
>> A similar flag seems to exists on freebsd (MAP_PREFAULT_READ) but I do
>
> exists -> exit
exist ?
>> [1] https://lists.lttng.org/pipermail/lttng-dev/2019-July/029122.html
>>
>> Tested-by: Yiteng Guo [1]
>
> I think you might want t
- On Jul 29, 2019, at 2:23 PM, Jonathan Rajotte
jonathan.rajotte-jul...@efficios.com wrote:
> Any ring buffer configuration bigger than PAGE_SIZE would result
> in increase latency for the first tracepoint hit (1200ns) lending on a
landing
> new PAGE_SIZE sized chunk of the mapped memory. T
Any ring buffer configuration bigger than PAGE_SIZE would result
in increase latency for the first tracepoint hit (1200ns) lending on a
new PAGE_SIZE sized chunk of the mapped memory. This happens at least
for the first ring buffer traversal.
To alleviate this we can use MAP_POPULATE that will "pr
- On Jul 29, 2019, at 11:46 AM, Gabriel-Andrew Pollo-Guilbert
gabriel.pollo-guilb...@efficios.com wrote:
> Upstream Linux kernel commit in 4.14.0:
>
> commit efb40f588b4370ffaeffafbd50f6ff213d954254
> Author: Peter Zijlstra
> Date: Fri Sep 22 18:19:53 2017 +0200
>
>sched/tracing: Fix
Upstream Linux kernel commit in 4.14.0:
commit efb40f588b4370ffaeffafbd50f6ff213d954254
Author: Peter Zijlstra
Date: Fri Sep 22 18:19:53 2017 +0200
sched/tracing: Fix trace_sched_switch task-state printing
commit 3f5fe9fef5b2da06b6319fab8123056da5217c3f
Author: Thomas Gleixner
Date: We
Merged into master, 2.11, 2.10, 2.9, thanks!
Mathieu
- On Jul 29, 2019, at 11:14 AM, Gabriel-Andrew Pollo-Guilbert
gabriel.pollo-guilb...@efficios.com wrote:
> Commit 973eac638e4fd introduces an uninitialised value that may prevent
> shared memory from being allocated. The compiler didn't g
Commit 973eac638e4fd introduces an uninitialised value that may prevent
shared memory from being allocated. The compiler didn't give any warning
because the pointer to the value is sent to a function that don't do anything
with it. We simply pass NULL to that function.
---
liblttng-ust/lttng-ust-c
On 2019-07-29 5:07 a.m., Ravindra Kumar Meena wrote:
> Okay. The above link was somewhat helpful but I still didn't get what is the
> meaning of {0, 1, 1026, 4096} values in _prev_state.
>
Christophe explained, the values of _prev_state.
In addition, I suggest you read those links (from gene
Merged into master, 2.11, 2.10, 2.9, thanks!
Mathieu
- On Jul 26, 2019, at 6:00 PM, Gabriel-Andrew Pollo-Guilbert
gabriel.pollo-guilb...@efficios.com wrote:
> The release of GCC 9 added the following warning:
>
> -Waddress-of-packed-member, enabled by default, warns about an
>
- On Jul 29, 2019, at 9:35 AM, Junchang Wang junchangw...@gmail.com wrote:
> Hi Mathieu and the list,
>
> I'm recently using userspace-rcu to build lock-free data structures. Thanks
> for
> sharing this excellent project!
>
> In building a hash table, I am looking for an ordered singly link
On 2019-07-26 5:27 p.m., Khem Raj wrote:
>>
>> I don't see the definition of gettid().
>
> its a syscall wrapper which is generated during build from
> sysdeps/unix/sysv/linux/syscalls.list
>
OK, now I understand, thanks !
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lttng-dev mailing list
l
- On Jul 29, 2019, at 9:35 AM, Junchang Wang junchangw...@gmail.com wrote:
> Signed-off-by: Junchang Wang
Hi Junchang,
Thanks for submitting this! I've been on vacation for the past two weeks,
hence the delay in reply.
A few points:
I think we should move the implementation of find/insert
Signed-off-by: Junchang Wang
---
doc/cds-api.md | 7 +++
1 file changed, 7 insertions(+)
diff --git a/doc/cds-api.md b/doc/cds-api.md
index 49a3c7c..577126a 100644
--- a/doc/cds-api.md
+++ b/doc/cds-api.md
@@ -82,3 +82,10 @@ are supported. Provides "uniquify add" and "replace add"
operation
Signed-off-by: Junchang Wang
---
include/Makefile.am | 1 +
include/urcu/cds.h | 1 +
2 files changed, 2 insertions(+)
diff --git a/include/Makefile.am b/include/Makefile.am
index 34812d4..c4de329 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -2,6 +2,7 @@ nobase_dist_include_HEA
Signed-off-by: Junchang Wang
---
doc/examples/rculflist/Makefile| 24 +
.../rculflist/Makefile.cds_lflist_delete_rcu | 21 +
.../rculflist/Makefile.cds_lflist_find_rcu | 21 +
.../rculflist/Makefile.cds_lflist_insert_rcu | 21 +
doc/exam
Signed-off-by: Junchang Wang
---
include/urcu/rculflist.h | 284 +++
1 file changed, 284 insertions(+)
create mode 100644 include/urcu/rculflist.h
diff --git a/include/urcu/rculflist.h b/include/urcu/rculflist.h
new file mode 100644
index 000..35c
Hi Mathieu and the list,
I'm recently using userspace-rcu to build lock-free data structures. Thanks for
sharing this excellent project!
In building a hash table, I am looking for an ordered singly linked list
that is lock-free. It seems such a list is missing in userspace-rcu. I
discussed this w
Hi,
Re-sending since I previously used an email address not subscribed to the
ML.
On Mon, 29 Jul 2019 at 11:08, Ravindra Kumar Meena
wrote:
> Okay. The above link was somewhat helpful but I still didn't get what is
> the meaning of {0, 1, 1026, 4096} values in _prev_state.
>
> In babeltrace out
>
> > On 2019-07-24 2:44 a.m., Ravindra Kumar Meena wrote:
> > > Hi,
> > >
> > > I had a looked at TraceCompass example. I came across sched_swithc
> event in present in the metadata.
> > >
> > > event {
> > > name = "sched_switch";
> > > id = 27;
> > > stream_id
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