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| author | kaf24@firebug.cl.cam.ac.uk <kaf24@firebug.cl.cam.ac.uk> | 2005-08-26 11:02:14 +0000 |
|---|---|---|
| committer | kaf24@firebug.cl.cam.ac.uk <kaf24@firebug.cl.cam.ac.uk> | 2005-08-26 11:02:14 +0000 |
| commit | 8a181133e2b48289ff83f5efdb4bdcb289346413 (patch) | |
| tree | e64901a67b6a6d5a79902b7c650ecd6afdf4de55 /tools/ioemu/hw/mc146818rtc.c | |
| parent | f67a7f79025ddd93f78aaa244eedf9e95b9e80f0 (diff) | |
| download | xen-8a181133e2b48289ff83f5efdb4bdcb289346413.tar.gz xen-8a181133e2b48289ff83f5efdb4bdcb289346413.tar.bz2 xen-8a181133e2b48289ff83f5efdb4bdcb289346413.zip | |
The patched attached enables x86_64 xenlinux with "late pin, early
unpin", which is already implemented for x86_32. Since we now only pin
the root rather than any of the other levels, the overall performance
became better especially with workloads that require heavy memory
management operations.
On 8-way x86_64 xenlinux (dom0) the kernel build was improved by about
10% (using make -j32). Even a small setup like a UP HT system, I see
about 3% performance gain with kernel build (make -j4).
Lmbench also shows improvements in fork/exec/sh:
Processor, Processes - times in microseconds - smaller is better
--------------------------------------------------------------------
Host OS Mhz null null open slct sig sig fork exec sh =20
call I/O stat clos TCP inst hndl proc proc proc
--------- ------------- ---- ---- ---- ---- ---- ---- ---- ---- ----=20
Linux 2.6.12- 3786 1.13 1.36 3.93 6.04 10.5 1.43 4.33 536. 1446 3614
Linux 2.6.12- 3786 1.13 1.36 3.91 6.03 10.4 1.44 4.38 346. 1050 2831
Signed-off-by: Jun Nakajima <jun.nakajima@intel.com>
Diffstat (limited to 'tools/ioemu/hw/mc146818rtc.c')
0 files changed, 0 insertions, 0 deletions