>
> > 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
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
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
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
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/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/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
- 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
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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- 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
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 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
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
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
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
- 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
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 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
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 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
- 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
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
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
- 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
- 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 2:57 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:
>>
> @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
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
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
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 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
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