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| author | Andrew Morton <akpm@zip.com.au> | 2002-07-18 21:09:17 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@home.transmeta.com> | 2002-07-18 21:09:17 -0700 |
| commit | e177ea28e7eded3490174487c81e5bef8a2c4d95 (patch) | |
| tree | 3a4422d4f04b7643fd14e809e7b8385246122bd9 /include/linux/page-flags.h | |
| parent | 6a2ea3382b534e937ba2153f4a0c6021e04a1ef5 (diff) | |
[PATCH] VM instrumentation
A patch from Rik which adds some operational statitics to the VM.
In /proc/meminfo:
PageTables: Amount of memory used for process pagetables
PteChainTot: Amount of memory allocated for pte_chain objects
PteChainUsed: Amount of memory currently in use for pte chains.
In /proc/stat:
pageallocs: Number of pages allocated in the page allocator
pagefrees: Number of pages returned to the page allocator
(These can be used to measure the allocation rate)
pageactiv: Number of pages activated (moved to the active list)
pagedeact: Number of pages deactivated (moved to the inactive list)
pagefault: Total pagefaults
majorfault: Major pagefaults
pagescan: Number of pages which shrink_cache looked at
pagesteal: Number of pages which shrink_cache freed
pageoutrun: Number of calls to try_to_free_pages()
allocstall: Number of calls to balance_classzone()
Rik will be writing a userspace app which interprets these things.
The /proc/meminfo stats are efficient, but the /proc/stat accumulators
will cause undesirable cacheline bouncing. We need to break the disk
statistics out of struct kernel_stat and make everything else in there
per-cpu. If that doesn't happen in time for 2.6 then we disable
KERNEL_STAT_INC().
Diffstat (limited to 'include/linux/page-flags.h')
| -rw-r--r-- | include/linux/page-flags.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h index a1efdff4d23c..f272b7d7f465 100644 --- a/include/linux/page-flags.h +++ b/include/linux/page-flags.h @@ -78,6 +78,9 @@ extern struct page_state { unsigned long nr_pagecache; unsigned long nr_active; /* on active_list LRU */ unsigned long nr_inactive; /* on inactive_list LRU */ + unsigned long nr_page_table_pages; + unsigned long nr_pte_chain_pages; + unsigned long used_pte_chains_bytes; } ____cacheline_aligned_in_smp page_states[NR_CPUS]; extern void get_page_state(struct page_state *ret); |