Some quick timings, fwiw.
For those that missed the season premiere, I am compiling an application
consisting of about 500K lines of C and C++ code in 1200 source files with
about 100 makefiles, using GNU make. Dom0 is a Dell PE2900 with two
quad-core 2.33 GHz processors and 24 GB memory; all file systems are
RAID-1 SATA 7.2K rpm; xen is 3.0.3. Sources are read from an NFS mount in
each case, where Dom0 is the NFS server (except for the Dom0 test itself,
which is local); objects are written to a different NFS mount.
Dependencies were evaluated in an earlier step.
Timings (min:sec elapsed) are the average of two runs (from "time make");
everything was idle (except for the guest) during each run. CPU
utilization in the guest, as reported by "time", was about 85% in each
case. Each guest has 1 VCPU and 512 MB memory. For HVM, each qemu-dm on
Dom0 consumed between 10% and 25% of one core while compiling. The ccache
was cleared before each run, where applicable. There were no Linux PV
guests without NFS root.
CentOS 5.2 (dom0), x86_64, 2.6.18-92.1.18.el5xen, gcc 4.1.2 4:58
Fedora 6, i686, 2.6.20, gcc 4.1.2, PV, NFS root 5:52
Fedora 6, x86_64, 2.6.20, gcc 4.1.2, PV, NFS root 6:39
Fedora 9, i686, 2.6.25.3, gcc 4.3.0, PV, NFS root 6:21
Fedora 9, x86_64, 2.6.25.3, gcc 4.3.0, PV, NFS root 7:09
RHEL4, i686, 2.6.9-78.0.8.EL, gcc 3.4.6, HVM (file-based) 11:03
RHEL4, x86_64, 2.6.9-78.0.8.EL, gcc 3.4.6, HVM (file-based) 12:25
A re-run on Fedora 9 using the ccache'd objects reduced the time to 3:17
(64-bit) and 3:05 (32-bit). Compilation on Dom0 using -j4 gives a time of
1:28. I have not tried a guest with more than one VCPU (will do so in
another episode).
Each 32-bit build is 12% faster than the corresponding 64-bit build, PV or
HVM. I cannot compare these timings with the Windows timings, since the
software being compiled is not the same.
Timings for running another small-memory CPU-bound application (no I/O),
relative to the Dom0 performance:
Dom0 1.00
Fedora 6, x86_64 0.99
Fedora 6, i686 0.88
Fedora 9, x86_64 1.00
Fedora 9, i686 0.85
RHEL4, x86_64 0.95
RHEL4, i686 0.80
Steve
_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users
|
Home