Re: [perf-discuss] segmap_kpm on x86

2009-05-22 Thread Dale Ghent
Just a follow-up - Thanks very much, Parakash, for this help. I've adjusted vpm_cache_percent on some systems and results were as expected (and NFS activity back to the server is almost half of what it used to be!) /dale On May 15, 2009, at 1:33 AM, prakash sangappa wrote: Dale Ghent w

Re: [perf-discuss] segmap_kpm on x86

2009-05-14 Thread prakash sangappa
Dale Ghent wrote: On May 14, 2009, at 10:24 PM, prakash sangappa wrote: However, a new set of interfaces called VPM was introduced which provide transient mappings to file pages similar, to segmap. The VPM interfaces use KPM mappings. The UFS, NFS, TMPFS and SPECfs filesystem use the VPM inter

Re: [perf-discuss] segmap_kpm on x86

2009-05-14 Thread Dale Ghent
On May 14, 2009, at 10:24 PM, prakash sangappa wrote: However, a new set of interfaces called VPM was introduced which provide transient mappings to file pages similar, to segmap. The VPM interfaces use KPM mappings. The UFS, NFS, TMPFS and SPECfs filesystem use the VPM interface where availab

Re: [perf-discuss] segmap_kpm on x86

2009-05-14 Thread prakash sangappa
Dale Ghent wrote: I'm observing the segmap_kpm variable on a running 64bit kernel and it's value is 0. It seems to be explicitly set as such at: http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/uts/i86pc/os/startup.c#1969 The segmap segment cannot use KPM mappings on x64 syste