On Tue, 17 Mar 2020 13:23:28 -0400
George Koehler wrote:
> clang -static -L. -nopie -o instbin instbin.o dd.lo ...
> /usr/bin/ld: dd.lo(.text+0x14): R_PPC_PLTREL24 reloc against local symbol
>
> ...
>
> Passing -M to crunchgen(8), as we do on {longsoon,octeon,sgi}, might
> work around the
Hi Martin, hi Klemens,
Martin Pieuchot wrote on Wed, Mar 18, 2020 at 09:06:24PM +0100:
> On 18/03/20(Wed) 20:45, Klemens Nanni wrote:
>> It takes a format string, e.g.
>>
>> syscall:sysctl:entry {
>> time("%+\n")
>> }
I can't comment on the content of bt(5).
> This is
On Wed, Mar 18, 2020 at 09:06:24PM +0100, Martin Pieuchot wrote:
> This is indeed an improvement, thanks! I don't know how to point that
> 'format' or 'timefmt' is the same as describe in strftime(3). Does that
> mean strftime(3) should appear in SEE ALSO?
I see no value in adding it to that
On 18/03/20(Wed) 20:45, Klemens Nanni wrote:
> It takes a format string, e.g.
>
> syscall:sysctl:entry {
> time("%+\n")
> }
>
This is indeed an improvement, thanks! I don't know how to point that
'format' or 'timefmt' is the same as describe in strftime(3). Does that
It takes a format string, e.g.
syscall:sysctl:entry {
time("%+\n")
}
OK?
Index: bt.5
===
RCS file: /cvs/src/usr.sbin/btrace/bt.5,v
retrieving revision 1.2
diff -u -p -r1.2 bt.5
--- bt.527
On Wed, Mar 18, 2020 at 11:22:40AM +0100, Patrick Wildt wrote:
> Hi,
>
> I've spent a few days investigating why USB ethernet adapters are so
> horribly slow on my ARMs. Using dt(4) I realized that it was spending
> most of its time in memcpy. But, why? As it turns out, all USB data
> buffers
Claudio Jeker wrote:
> I highly suspect that this is not correct without further changes.
> There is a reason why the comment is explicit about the fact that it only
> works if SCM_RIGHTS is the only control message type. Just ignoring this
> fact is probably a security risk.
Isn't the
On 18/03/20(Wed) 11:55, Mark Kettenis wrote:
> > Date: Wed, 18 Mar 2020 11:34:59 +0100
> > From: Martin Pieuchot
> >
> > On 17/03/20(Tue) 20:08, Mark Kettenis wrote:
> > > While playing with dt(4)/btrace(4) flamegraphs on a 32-core arm64
> > > machine, I noticed that the kernel was spending a
> Date: Wed, 18 Mar 2020 11:34:59 +0100
> From: Martin Pieuchot
>
> On 17/03/20(Tue) 20:08, Mark Kettenis wrote:
> > While playing with dt(4)/btrace(4) flamegraphs on a 32-core arm64
> > machine, I noticed that the kernel was spending a lot of time (6.84%)
> > in uvm_map_inentry(). This is
On 17/03/20(Tue) 20:08, Mark Kettenis wrote:
> While playing with dt(4)/btrace(4) flamegraphs on a 32-core arm64
> machine, I noticed that the kernel was spending a lot of time (6.84%)
> in uvm_map_inentry(). This is caused by kernel lock contention.
> Pushing baack the kernel lock further into
On Wed, Mar 18, 2020 at 03:35:45PM +0530, Neeraj Pal wrote:
> On Wed, 18 Mar, 2020, 12:46 pm Otto Moerbeek, wrote:
>
> > There are several types of canaries. They try to detect corruption of
> > various meta data structures. There are alo canaries for user allocated
> > data, they are enabled
Hi,
I've spent a few days investigating why USB ethernet adapters are so
horribly slow on my ARMs. Using dt(4) I realized that it was spending
most of its time in memcpy. But, why? As it turns out, all USB data
buffers are mapped COHERENT, which on some/most ARMs means uncached.
Using cached
On Wed, Mar 18, 2020 at 02:53:14AM -, David Mackay wrote:
> Dear openbsd-tech,
>
> On GNU HURD and FreeBSD, the control message SCM_CREDS may be allocated by a
> client of a Unix datagram socket. When the kernel encounters this, it fills
> out
> a struct cmsgcred containing PID, UID, GID,
On Wed, 18 Mar, 2020, 12:46 pm Otto Moerbeek, wrote:
> There are several types of canaries. They try to detect corruption of
> various meta data structures. There are alo canaries for user allocated
> data, they are enabled with the C option.
>
Yeah, I am using option C through sysctl(8) to
On 2020/03/18 02:53, David Mackay wrote:
> Dear openbsd-tech,
>
> On GNU HURD and FreeBSD, the control message SCM_CREDS may be allocated by a
> client of a Unix datagram socket. When the kernel encounters this, it fills
> out
> a struct cmsgcred containing PID, UID, GID, effective UID, and
On Wed, Mar 18, 2020 at 07:29:51AM +0530, Neeraj Pal wrote:
> On Fri, Mar 13, 2020, at 11:45 AM Otto Moerbeek wrote:
> >
> > Please indent your code snippets.
> yeah, my apologies. I shall indent the code snippets.
>
> >
> > di_info is special. Having a guard page on both sides for regular
> >
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