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| author | Chuck Lever <cel@netapp.com> | 2006-03-20 13:44:14 -0500 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2006-03-20 13:44:14 -0500 |
| commit | 91d5b47023b608227d605d1e916b29dd0215bff7 (patch) | |
| tree | 31dbb285639ea68db3abc0c4129988f02d50f11a /fs/nfs/direct.c | |
| parent | d9ef5a8c26aab09762afce43df64736720b4860e (diff) | |
| download | linux-91d5b47023b608227d605d1e916b29dd0215bff7.tar.gz linux-91d5b47023b608227d605d1e916b29dd0215bff7.tar.bz2 linux-91d5b47023b608227d605d1e916b29dd0215bff7.zip | |
NFS: add I/O performance counters
Invoke the byte and event counter macros where we want to count bytes and
events.
Clean-up: fix a possible NULL dereference in nfs_lock, and simplify
nfs_file_open.
Test-plan:
fsx and iozone on UP and SMP systems, with and without pre-emption. Watch
for memory overwrite bugs, and performance loss (significantly more CPU
required per op).
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/direct.c')
| -rw-r--r-- | fs/nfs/direct.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c index 4e9b3a1b36c5..fc07ce4885da 100644 --- a/fs/nfs/direct.c +++ b/fs/nfs/direct.c @@ -54,6 +54,8 @@ #include <asm/uaccess.h> #include <asm/atomic.h> +#include "iostat.h" + #define NFSDBG_FACILITY NFSDBG_VFS #define MAX_DIRECTIO_SIZE (4096UL << PAGE_SHIFT) @@ -67,6 +69,7 @@ struct nfs_direct_req { struct kref kref; /* release manager */ struct list_head list; /* nfs_read_data structs */ wait_queue_head_t wait; /* wait for i/o completion */ + struct inode * inode; /* target file of I/O */ struct page ** pages; /* pages in our buffer */ unsigned int npages; /* count of pages */ atomic_t complete, /* i/os we're waiting for */ @@ -357,7 +360,9 @@ static ssize_t nfs_direct_read_seg(struct inode *inode, dreq->pages = pages; dreq->npages = nr_pages; + dreq->inode = inode; + nfs_add_stats(inode, NFSIOS_DIRECTREADBYTES, count); rpc_clnt_sigmask(clnt, &oldset); nfs_direct_read_schedule(dreq, inode, ctx, user_addr, count, file_offset); @@ -572,6 +577,7 @@ static ssize_t nfs_direct_write(struct inode *inode, return page_count; } + nfs_add_stats(inode, NFSIOS_DIRECTWRITTENBYTES, size); result = nfs_direct_write_seg(inode, ctx, user_addr, size, file_offset, pages, page_count); nfs_free_user_pages(pages, page_count, 0); @@ -581,6 +587,7 @@ static ssize_t nfs_direct_write(struct inode *inode, break; return result; } + nfs_add_stats(inode, NFSIOS_SERVERWRITTENBYTES, result); tot_bytes += result; file_offset += result; if (result < size) |