[systemd-devel] Significant performance loss caused by commit a65f06b: journal: return -ECHILD after a fork

[Tomasz Torcz]

On Tue, Jul 11, 2017 at 04:10:38PM +0200, Lennart Poettering wrote:
> On Tue, 11.07.17 16:07, Lennart Poettering (lennart at poettering.net) wrote:
> > Hmm, so I run a slightly older glibc, as I haven#t updated my system
> > in a while:
> > 
> > $ strace -c journalctl --since -1hour 2>&1 >/dev/null | head -10
> > % time     seconds  usecs/call     calls    errors syscall
> > ------ ----------- ----------- --------- --------- ----------------
> >  25.95    0.001276           7       195           mmap
> >  23.21    0.001141           7       164        30 open
> >  22.29    0.001096           9       119           munmap
> >   6.53    0.000321           2       134           close
> >   6.10    0.000300           2       135           fstat
> >   5.15    0.000253           5        56           mprotect
> >   4.88    0.000240           2       102           fstatfs
> >   2.30    0.000113           4        32           read
> > 
> > getpid() is nowhere to be seen in this... Seems Fedora regressed on
> > this too recently. Meh.
> 
> Forgot to mention:
> 
> $ rpm -qa glibc
> glibc-2.24-4.fc25.x86_64
> 
> Apparently, this regressed between this version and
> glibc-2.24-9.fc25.x86_64 hence.
> 

  From glibc changelog:

* Wed Jun 07 2017 Arjun Shankar <arjun.is at lostca.se> - 2.24-6
- Auto-sync with upstream release/2.24/master,
  commit 7b60553e360731338631ccdda71590ac5deca137, fixing:
- Remove the PID cache  (#1443976)

-- 
Tomasz Torcz                        To co nierealne -- tutaj jest normalne.
xmpp: zdzichubg at chrome.pl          Ziomale na życie mają tu patenty specjalne.