From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from d01relay02.pok.ibm.com (d01relay02.pok.ibm.com [9.56.227.234]) by e2.ny.us.ibm.com (8.13.8/8.13.8) with ESMTP id m2BKNKqf029618 for ; Tue, 11 Mar 2008 16:23:20 -0400 Received: from d01av04.pok.ibm.com (d01av04.pok.ibm.com [9.56.224.64]) by d01relay02.pok.ibm.com (8.13.8/8.13.8/NCO v8.7) with ESMTP id m2BKNKFF245962 for ; Tue, 11 Mar 2008 16:23:20 -0400 Received: from d01av04.pok.ibm.com (loopback [127.0.0.1]) by d01av04.pok.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id m2BKNKYT003828 for ; Tue, 11 Mar 2008 16:23:20 -0400 Received: from [9.67.58.99] (wecm-9-67-58-99.wecm.ibm.com [9.67.58.99]) by d01av04.pok.ibm.com (8.12.11.20060308/8.12.11) with ESMTP id m2BKNJbP003782 for ; Tue, 11 Mar 2008 16:23:19 -0400 Subject: [PATCH] hugetlb: vmstat events for huge page allocations From: Eric B Munson Reply-To: ebmunson@us.ibm.com Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-5QBBwTOmRl/Yd0xM/S5t" Date: Tue, 11 Mar 2008 13:23:21 -0700 Message-Id: <1205267001.7676.6.camel@grover.beaverton.ibm.com> Mime-Version: 1.0 Sender: owner-linux-mm@kvack.org Return-Path: To: linux-mm@kvack.org List-ID: --=-5QBBwTOmRl/Yd0xM/S5t Content-Type: text/plain Content-Transfer-Encoding: quoted-printable From: Adam Litke Allocating huge pages directly from the buddy allocator is not guaranteed to succeed. Success depends on several factors (such as the amount of physical memory available and the level of fragmentation). With the addition of dynamic hugetlb pool resizing, allocations can occur much more frequently. For these reasons it is desirable to keep track of huge page allocation successes and failures. Add two new vmstat entries to track huge page allocations that succeed and fail. The presence of the two entries is contingent upon CONFIG_HUGETLB_PAGE being enabled. This patch was created against linux-2.6.25-rc5 Signed-off-by: Adam Litke Signed-off-by: Eric Munson --- include/linux/vmstat.h | 4 +++- mm/hugetlb.c | 7 +++++++ mm/vmstat.c | 2 ++ 3 files changed, 12 insertions(+), 1 deletions(-) diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h index 9f1b4b4..70f6861 100644 --- a/include/linux/vmstat.h +++ b/include/linux/vmstat.h @@ -27,6 +27,8 @@ #define FOR_ALL_ZONES(xx) DMA_ZONE(xx) DMA32_ZONE(xx) xx##_NORMAL HIGHMEM_= ZONE(xx) , xx##_MOVABLE +#define HTLB_STATS HTLB_ALLOC_SUCCESS, HTLB_ALLOC_FAIL + enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT, FOR_ALL_ZONES(PGALLOC), PGFREE, PGACTIVATE, PGDEACTIVATE, @@ -36,7 +38,7 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT, FOR_ALL_ZONES(PGSCAN_KSWAPD), FOR_ALL_ZONES(PGSCAN_DIRECT), PGINODESTEAL, SLABS_SCANNED, KSWAPD_STEAL, KSWAPD_INODESTEA= L, - PAGEOUTRUN, ALLOCSTALL, PGROTATED, + PAGEOUTRUN, ALLOCSTALL, PGROTATED, HTLB_STATS, NR_VM_EVENT_ITEMS }; diff --git a/mm/hugetlb.c b/mm/hugetlb.c index dcacc81..1507697 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -239,6 +239,11 @@ static int alloc_fresh_huge_page(void) hugetlb_next_nid =3D next_nid; } while (!page && hugetlb_next_nid !=3D start_nid); + if (ret) + count_vm_event(HTLB_ALLOC_SUCCESS); + else + count_vm_event(HTLB_ALLOC_FAIL); + return ret; } @@ -293,9 +298,11 @@ static struct page *alloc_buddy_huge_page(struct vm_ar= ea_struct *vma, */ nr_huge_pages_node[nid]++; surplus_huge_pages_node[nid]++; + count_vm_event(HTLB_ALLOC_SUCCESS); } else { nr_huge_pages--; surplus_huge_pages--; + count_vm_event(HTLB_ALLOC_FAIL); } spin_unlock(&hugetlb_lock); diff --git a/mm/vmstat.c b/mm/vmstat.c index 422d960..045a8d7 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -644,6 +644,8 @@ static const char * const vmstat_text[] =3D { "allocstall", "pgrotated", + "htlb_alloc_success", + "htlb_alloc_fail", #endif }; --=-5QBBwTOmRl/Yd0xM/S5t Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQBH1uo5snv9E83jkzoRAkd9AKCQJpAgxGy/8x0sGyY1w9+AxQq4aQCg6aO7 1qY8szz84ykyxEFnyxYC9Ug= =TSYL -----END PGP SIGNATURE----- --=-5QBBwTOmRl/Yd0xM/S5t-- -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org