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| author |   Trond Myklebust <trond.myklebust@hammerspace.com> | 2019-07-15 15:12:08 -0400 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@hammerspace.com> | 2019-07-16 07:11:58 -0400 |
| commit | 3cf7292280d5e484747a5f0ee4b62327b037344c (patch) | |
| tree | 31942b53680b0c64c364322c154753857a93eb93 /net | |
| parent | NFSv4: Validate the stateid before applying it to state recovery (diff) | |
| download | linux-dev-3cf7292280d5e484747a5f0ee4b62327b037344c.tar.xz linux-dev-3cf7292280d5e484747a5f0ee4b62327b037344c.zip | |
SUNRPC: Replace division by multiplication in calculation of queue length
When checking whether or not a particular xprt queue length is shorter
than the average queue length for all xprts, prefer to use multiplication
rather than division for performance reasons.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/sunrpc/xprtmultipath.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/net/sunrpc/xprtmultipath.c b/net/sunrpc/xprtmultipath.c index 9d66ce53355d..5df4e7adedf0 100644 --- a/net/sunrpc/xprtmultipath.c +++ b/net/sunrpc/xprtmultipath.c @@ -322,7 +322,6 @@ struct rpc_xprt *xprt_iter_next_entry_roundrobin(struct rpc_xprt_iter *xpi) struct rpc_xprt *xprt; unsigned long xprt_queuelen; unsigned long xps_queuelen; - unsigned long xps_avglen; do { xprt = xprt_iter_next_entry_multiple(xpi, @@ -333,8 +332,8 @@ struct rpc_xprt *xprt_iter_next_entry_roundrobin(struct rpc_xprt_iter *xpi) if (xprt_queuelen <= 2) break; xps_queuelen = atomic_long_read(&xps->xps_queuelen); - xps_avglen = DIV_ROUND_UP(xps_queuelen, xps->xps_nactive); - } while (xprt_queuelen > xps_avglen); + /* Exit loop if xprt_queuelen <= average queue length */ + } while (xprt_queuelen * READ_ONCE(xps->xps_nactive) > xps_queuelen); return xprt; } |