Re: [lttng-dev] reading context fields causes syscalls

- On Jul 14, 2022, at 9:10 AM, Norbert Lange nolang...@gmail.com wrote: > Hello Mathieu, > > Am Do., 20. Mai 2021 um 16:16 Uhr schrieb Mathieu Desnoyers > : >> >> - On May 20, 2021, at 9:42 AM, Norbert Lange nolang...@gmail.com wrote: >> >> > Am Do., 20. Mai 2021 um 15:28 Uhr schrieb Math

Re: [lttng-dev] LTTng on RHEL 7.9 with real time kernel patch

- On Jul 15, 2022, at 9:19 AM, Pennese Marco via lttng-dev wrote: > Hi, > I’m trying to use LTTng on a Red Hat Enterprise Linux 7.9 (with the real time > kernel patch). > I installed LTTng on the machine following the EfficiOS guide linked by lttng > official website. > In my configurati

[lttng-dev] [PATCH] Improve tracef/tracelog to use the stack for small strings

Support two common cases, one being that the resulting message is small enough to fit into a on-stack buffer. The seconds being the common 'printf("%s", "Message")' scheme. Unfortunately, iterating a va_list is destructive, so it has to be copied before calling vprintf. The implementation was mov

[lttng-dev] [PATCH 2/2] lttng_ust_init_thread: call urcu_register_thread

Eagerly register the thread, and avoid taking mutex during the first tracepoint. Signed-off-by: Norbert Lange --- src/lib/lttng-ust/lttng-ust-comm.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/src/lib/lttng-ust/lttng-ust-comm.c b/src/lib/lttng-ust/lttng-ust-comm.c index ba0bd985..3ff6

[lttng-dev] [PATCH 1/2] lttng_ust_init_thread: initialise cached context values

Modify all relevant *_alloc_tls functions so that they take an argument for 'init'. Setting this to 'true' will read the actual context value and store it into a thread local cache. The function 'lttng_ust_init_thread' will use this to precalculate context values. Tracepoints can then avoid system