On Thu, Sep 24, 2020 at 12:09 AM Steven Rostedt wrote:
>
> On Wed, 23 Sep 2020 18:04:17 +0800
> Yafang Shao wrote:
>
> > > What you can do, and what we have done is the following:
> > >
> > > (see include/linux/page_ref.h)
> > >
> > >
> > > #ifdef CONFIG_TRACING
> > > extern struct tracepoint __t
Hi Steve, Axel,
On Fri, 2020-09-18 at 16:41 -0400, Steven Rostedt wrote:
> On Fri, 18 Sep 2020 13:26:37 -0700
> Axel Rasmussen wrote:
>
> > On Thu, Sep 17, 2020 at 12:43 PM Steven Rostedt <
> > rost...@goodmis.org> wrote:
> > >
> > > On Thu, 17 Sep 2020 11:13:47 -0700
> > > Axel Rasmussen wrot
On Wed, Sep 23, 2020 at 9:09 AM Steven Rostedt wrote:
>
> On Wed, 23 Sep 2020 18:04:17 +0800
> Yafang Shao wrote:
>
> > > What you can do, and what we have done is the following:
> > >
> > > (see include/linux/page_ref.h)
> > >
> > >
> > > #ifdef CONFIG_TRACING
> > > extern struct tracepoint __tr
On Wed, 23 Sep 2020 18:04:17 +0800
Yafang Shao wrote:
> > What you can do, and what we have done is the following:
> >
> > (see include/linux/page_ref.h)
> >
> >
> > #ifdef CONFIG_TRACING
> > extern struct tracepoint __tracepoint_mmap_lock_start_locking;
> > extern struct tracepoint __tracepoint_
On Wed, Sep 23, 2020 at 12:51 AM Steven Rostedt wrote:
>
> On Tue, 22 Sep 2020 12:09:19 +0800
> Yafang Shao wrote:
>
> > > > Are there any methods to avoid un-inlining these wrappers ?
> > > >
> > > > For example,
> > > > // include/linux/mmap_lock.h
> > > >
> > > > void mmap_lock_start_trace_wra
On Tue, 22 Sep 2020 12:09:19 +0800
Yafang Shao wrote:
> > > Are there any methods to avoid un-inlining these wrappers ?
> > >
> > > For example,
> > > // include/linux/mmap_lock.h
> > >
> > > void mmap_lock_start_trace_wrapper();
> > > void mmap_lock_acquire_trace_wrapper();
> > >
> > > static in
On Mon, Sep 21, 2020 at 9:09 PM Yafang Shao wrote:
>
> On Tue, Sep 22, 2020 at 12:53 AM Axel Rasmussen
> wrote:
> >
> > On Sun, Sep 20, 2020 at 9:58 PM Yafang Shao wrote:
> > >
> > > On Fri, Sep 18, 2020 at 2:13 AM Axel Rasmussen
> > > wrote:
> > > >
> > > > The goal of these tracepoints is to
On Tue, Sep 22, 2020 at 12:53 AM Axel Rasmussen
wrote:
>
> On Sun, Sep 20, 2020 at 9:58 PM Yafang Shao wrote:
> >
> > On Fri, Sep 18, 2020 at 2:13 AM Axel Rasmussen
> > wrote:
> > >
> > > The goal of these tracepoints is to be able to debug lock contention
> > > issues. This lock is acquired on
On Sun, Sep 20, 2020 at 9:58 PM Yafang Shao wrote:
>
> On Fri, Sep 18, 2020 at 2:13 AM Axel Rasmussen
> wrote:
> >
> > The goal of these tracepoints is to be able to debug lock contention
> > issues. This lock is acquired on most (all?) mmap / munmap / page fault
> > operations, so a multi-threa
On Fri, Sep 18, 2020 at 2:13 AM Axel Rasmussen wrote:
>
> The goal of these tracepoints is to be able to debug lock contention
> issues. This lock is acquired on most (all?) mmap / munmap / page fault
> operations, so a multi-threaded process which does a lot of these can
> experience significant
On Fri, 18 Sep 2020 13:26:37 -0700
Axel Rasmussen wrote:
> On Thu, Sep 17, 2020 at 12:43 PM Steven Rostedt wrote:
> >
> > On Thu, 17 Sep 2020 11:13:47 -0700
> > Axel Rasmussen wrote:
> >
> > > +/*
> > > + * Trace calls must be in a separate file, as otherwise there's a
> > > circuclar
> > >
On Thu, Sep 17, 2020 at 12:43 PM Steven Rostedt wrote:
>
> On Thu, 17 Sep 2020 11:13:47 -0700
> Axel Rasmussen wrote:
>
> > +/*
> > + * Trace calls must be in a separate file, as otherwise there's a circuclar
> > + * dependency between linux/mmap_lock.h and trace/events/mmap_lock.h.
> > + */
> >
On Thu, 17 Sep 2020 11:13:47 -0700
Axel Rasmussen wrote:
> +/*
> + * Trace calls must be in a separate file, as otherwise there's a circuclar
> + * dependency between linux/mmap_lock.h and trace/events/mmap_lock.h.
> + */
> +
> +static void trace_start_locking(struct mm_struct *mm, bool write)
P
The goal of these tracepoints is to be able to debug lock contention
issues. This lock is acquired on most (all?) mmap / munmap / page fault
operations, so a multi-threaded process which does a lot of these can
experience significant contention.
We trace just before we start acquisition, when the
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