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| author | mafetter@fleming.research <mafetter@fleming.research> | 2005-03-21 12:01:36 +0000 |
|---|---|---|
| committer | mafetter@fleming.research <mafetter@fleming.research> | 2005-03-21 12:01:36 +0000 |
| commit | fb226ca216d418c1c6ceaf9871a4ef72e1fe7af6 (patch) | |
| tree | 7a3f55adb849badfe6fecb0b50286d67f47fc67b /xen/include/xen/perfc_defn.h | |
| parent | 8ed048c0d9fe4a045aeaa0a3525cff126448f10f (diff) | |
| download | xen-fb226ca216d418c1c6ceaf9871a4ef72e1fe7af6.tar.gz xen-fb226ca216d418c1c6ceaf9871a4ef72e1fe7af6.tar.bz2 xen-fb226ca216d418c1c6ceaf9871a4ef72e1fe7af6.zip | |
bitkeeper revision 1.1236.32.14 (423eb7a0HqJL37tAErMbIXIQw6Q3Jg)
Added prediction of where to find the last writable PTE for a given page;
greatly speeds up promotion of a page to be used as a page table.
Removed some broken concepts of write protecting PDEs and higher level
entries. To write protect a page, all we need to do is write protect all
L1 entries that point at it.
Fixed a bug with translated IO pages; gotta check that MFNs are really backed
by RAM before we go looking in the frame_table for them...
Signed-off-by: michael.fetterman@cl.cam.ac.uk
Diffstat (limited to 'xen/include/xen/perfc_defn.h')
| -rw-r--r-- | xen/include/xen/perfc_defn.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/xen/include/xen/perfc_defn.h b/xen/include/xen/perfc_defn.h index c7e3707bb0..5a8a09fa56 100644 --- a/xen/include/xen/perfc_defn.h +++ b/xen/include/xen/perfc_defn.h @@ -38,6 +38,7 @@ PERFSTATUS( shadow_l2_pages, "current # shadow L2 pages" ) PERFSTATUS( shadow_l1_pages, "current # shadow L1 pages" ) PERFSTATUS( hl2_table_pages, "current # hl2 pages" ) PERFSTATUS( snapshot_pages, "current # fshadow snapshot pages" ) +PERFSTATUS( writable_pte_predictions, "# writable pte predictions") PERFCOUNTER_CPU(shadow_status_shortcut, "fastpath miss on shadow cache") PERFCOUNTER_CPU(shadow_status_calls, "calls to ___shadow_status" ) @@ -73,4 +74,8 @@ PERFCOUNTER_CPU(write_fault_bail, "sf bailed due to write_fault PERFCOUNTER_CPU(read_fault_bail, "sf bailed due to read_fault") PERFCOUNTER_CPU(exception_fixed, "pre-exception fixed") PERFCOUNTER_CPU(remove_write_access, "calls to remove_write_access") -PERFCOUNTER_CPU(remove_write_access_easy, "easy outs of remove_write_access") +PERFCOUNTER_CPU(remove_write_no_work, "no work in remove_write_access") +PERFCOUNTER_CPU(remove_write_not_writable, "remove_write non-writable page") +PERFCOUNTER_CPU(remove_write_fast_exit, "remove_write hit predicted entry") +PERFCOUNTER_CPU(remove_write_predicted, "remove_write predict hit&exit") +PERFCOUNTER_CPU(remove_write_bad_prediction, "remove_write bad prediction") |