https://bugzilla.novell.com/show_bug.cgi?id=715854
https://bugzilla.novell.com/show_bug.cgi?id=715854#c8
--- Comment #8 from Bernhard Wiedemann 2011-09-04 11:08:36 CEST ---
as the patch was about vdso / vsyscall, I tried something that does many
syscalls without other bottlenecks:
on 3.1.0-rc4
with new vdso patch:
dd if=/dev/zero of=/dev/null bs=1 count=100000000
100000000+0 records in
100000000+0 records out
100000000 bytes (100 MB) copied, 35.7206 s, 2.8 MB/s
without new vdso patch:
dd if=/dev/zero of=/dev/null bs=1 count=100000000
100000000+0 records in
100000000+0 records out
100000000 bytes (100 MB) copied, 34.0184 s, 2.9 MB/s
and found that the speed is the same or even slightly faster without the patch
(at least in KVM on core-i7) - both do roughly six million syscalls per second.
--
Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are on the CC list for the bug.