From: Matt Mackall <mpm@selenic.com>
To: Christoph Lameter <clameter@sgi.com>
Cc: Mel Gorman <mel@skynet.ie>,
akpm@linux-foundatin.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org
Subject: Re: [patch 02/23] SLUB: Rename NUMA defrag_ratio to remote_node_defrag_ratio
Date: Thu, 8 Nov 2007 15:03:48 -0600 [thread overview]
Message-ID: <20071108210348.GX19691@waste.org> (raw)
In-Reply-To: <Pine.LNX.4.64.0711081159120.9966@schroedinger.engr.sgi.com>
On Thu, Nov 08, 2007 at 12:01:24PM -0800, Christoph Lameter wrote:
> On Thu, 8 Nov 2007, Matt Mackall wrote:
>
> > Not really. drivers/char/random.c does:
> >
> > __get_cpu_var(trickle_count)++ & 0xfff
>
> That is incremented on each call to add_timer_randomness. Not a high
> enough resolution there. I guess I am stuck with get_cycles().
I'm not suggesting you use trickle_count, silly. I'm suggesting you
use a similar approach.
But perhaps I should just add a lightweight RNG to random.c and be
done with it.
--
Mathematics is the supreme nostalgia of our time.
WARNING: multiple messages have this Message-ID (diff)
From: Matt Mackall <mpm@selenic.com>
To: Christoph Lameter <clameter@sgi.com>
Cc: Mel Gorman <mel@skynet.ie>,
akpm@linux-foundatin.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org
Subject: Re: [patch 02/23] SLUB: Rename NUMA defrag_ratio to remote_node_defrag_ratio
Date: Thu, 8 Nov 2007 15:03:48 -0600 [thread overview]
Message-ID: <20071108210348.GX19691@waste.org> (raw)
In-Reply-To: <Pine.LNX.4.64.0711081159120.9966@schroedinger.engr.sgi.com>
On Thu, Nov 08, 2007 at 12:01:24PM -0800, Christoph Lameter wrote:
> On Thu, 8 Nov 2007, Matt Mackall wrote:
>
> > Not really. drivers/char/random.c does:
> >
> > __get_cpu_var(trickle_count)++ & 0xfff
>
> That is incremented on each call to add_timer_randomness. Not a high
> enough resolution there. I guess I am stuck with get_cycles().
I'm not suggesting you use trickle_count, silly. I'm suggesting you
use a similar approach.
But perhaps I should just add a lightweight RNG to random.c and be
done with it.
--
Mathematics is the supreme nostalgia of our time.
--
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next prev parent reply other threads:[~2007-11-08 21:04 UTC|newest]
Thread overview: 152+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-07 1:11 [patch 00/23] Slab defragmentation V6 Christoph Lameter
2007-11-07 1:11 ` Christoph Lameter
2007-11-07 1:11 ` [patch 01/23] SLUB: Move count_partial() Christoph Lameter
2007-11-07 1:11 ` Christoph Lameter
2007-11-07 1:11 ` [patch 02/23] SLUB: Rename NUMA defrag_ratio to remote_node_defrag_ratio Christoph Lameter
2007-11-07 1:11 ` Christoph Lameter
2007-11-08 14:50 ` Mel Gorman
2007-11-08 14:50 ` Mel Gorman
2007-11-08 17:25 ` Matt Mackall
2007-11-08 17:25 ` Matt Mackall
2007-11-08 19:16 ` Christoph Lameter
2007-11-08 19:16 ` Christoph Lameter
2007-11-08 19:47 ` Matt Mackall
2007-11-08 19:47 ` Matt Mackall
2007-11-08 20:01 ` Christoph Lameter
2007-11-08 20:01 ` Christoph Lameter
2007-11-08 21:03 ` Matt Mackall [this message]
2007-11-08 21:03 ` Matt Mackall
2007-11-08 21:28 ` Christoph Lameter
2007-11-08 21:28 ` Christoph Lameter
2007-11-08 23:08 ` Matt Mackall
2007-11-08 23:08 ` Matt Mackall
2007-11-08 18:56 ` Christoph Lameter
2007-11-08 18:56 ` Christoph Lameter
2007-11-08 20:10 ` Mel Gorman
2007-11-08 20:10 ` Mel Gorman
2007-11-07 1:11 ` [patch 03/23] bufferhead: Revert constructor removal Christoph Lameter
2007-11-07 1:11 ` Christoph Lameter
2007-11-07 1:11 ` [patch 04/23] dentries: Extract common code to remove dentry from lru Christoph Lameter
2007-11-07 1:11 ` Christoph Lameter
2007-11-07 8:50 ` Johannes Weiner
2007-11-07 8:50 ` Johannes Weiner
2007-11-07 9:43 ` Jörn Engel
2007-11-07 9:43 ` Jörn Engel
2007-11-07 18:55 ` Christoph Lameter
2007-11-07 18:54 ` Jörn Engel
2007-11-07 18:54 ` Jörn Engel
2007-11-07 19:00 ` Christoph Lameter
2007-11-07 18:28 ` Christoph Lameter
2007-11-07 18:28 ` Christoph Lameter
2007-11-07 1:11 ` [patch 05/23] VM: Allow get_page_unless_zero on compound pages Christoph Lameter
2007-11-07 1:11 ` Christoph Lameter
2007-11-07 1:11 ` [patch 06/23] SLUB: Extend slabinfo to support -D and -C options Christoph Lameter
2007-11-07 1:11 ` Christoph Lameter
2007-11-08 15:00 ` Mel Gorman
2007-11-08 15:00 ` Mel Gorman
2007-11-07 1:11 ` [patch 07/23] SLUB: Add defrag_ratio field and sysfs support Christoph Lameter
2007-11-07 1:11 ` Christoph Lameter
2007-11-07 8:55 ` Johannes Weiner
2007-11-07 8:55 ` Johannes Weiner
2007-11-07 18:30 ` Christoph Lameter
2007-11-07 18:30 ` Christoph Lameter
2007-11-08 15:07 ` Mel Gorman
2007-11-08 15:07 ` Mel Gorman
2007-11-08 18:59 ` Christoph Lameter
2007-11-08 18:59 ` Christoph Lameter
2007-11-07 1:11 ` [patch 08/23] SLUB: Replace ctor field with ops field in /sys/slab/:0000008 /sys/slab/:0000016 /sys/slab/:0000024 /sys/slab/:0000032 /sys/slab/:0000040 /sys/slab/:0000048 /sys/slab/:0000056 /sys/slab/:0000064 /sys/slab/:0000072 /sys/slab/:0000080 /sys/slab/:0000088 /sys/slab/:0000096 /sys/slab/:0000104 /sys/slab/:0000128 /sys/slab/:0000144 /sys/slab/:0000184 /sys/slab/:0000192 /sys/slab/:0000216 /sys/slab/:0000256 /sys/slab/:0000344 /sys/slab/:0000384 /sys/slab/:0000448 /sys/slab/:0000512 /sys/slab/:0000768 /sys/slab/:0000968 /sys/slab/:0001024 /sys/slab/:0001152 /sys/slab/:0001312 /sys/slab/:0001536 /sys/slab/:0002048 /sys/slab/:0003072 /sys/slab/:0004096 /sys/slab/:a-0000016 /sys/slab/:a-0000024 /sys/slab/:a-0000056 /sys/slab/:a-0000080 /sys/slab/:a-0000128 /sys/slab/Acpi-Namespace /sys/slab/Acpi-Operand /sys/slab/Acpi-Parse /sys/slab/Acpi-ParseExt /sys/slab/Acpi-State /sys/slab/RAW /sys/slab/TCP /sys/slab/UDP /sys/slab/UDP-Lite /sys/slab/UNIX /sys/slab/anon_vma /s ys/slab/arp_cache /sys/slab/bdev_cache /sys/slab/bio /sys/slab/biovec-1 /sys/slab/biovec-128 /sys/slab/biovec-16 /sys/slab/biovec-256 /sys/slab/biovec-4 /sys/slab/biovec-64 /sys/slab/blkdev_ioc /sys/slab/blkdev_queue /sys/slab/blkdev_requests /sys/slab/buffer_head /sys/slab/cfq_io_context /sys/slab/cfq_queue /sys/slab/dentry /sys/slab/eventpoll_epi /sys/slab/eventpoll_pwq /sys/slab/ext2_inode_cache /sys/slab/ext3_inode_cache /sys/slab/fasync_cache /sys/slab/file_lock_cache /sys/slab/files_cache /sys/slab/filp /sys/slab/flow_cache /sys/slab/fs_cache /sys/slab/idr_layer_cache /sys/slab/inet_peer_cache /sys/slab/inode_cache /sys/slab/inotify_event_cache /sys/slab/inotify_watch_cache /sys/slab/ip_dst_cache /sys/slab/ip_fib_alias /sys/slab/ip_fib_hash /sys/slab/jbd_1k /sys/slab/jbd_4k /sys/slab/journal_handle /sys/slab/journal_head /sys/slab/kiocb /sys/slab/kioctx /sys/slab/kmalloc-1024 /sys/slab/kmalloc-128 /sys/slab/kmalloc-16 /sys/slab/kmalloc-192 /sys/slab/kmalloc-2048 /sys/s lab/kmalloc-256 /sys/slab/kmalloc-32 /sys/slab/kmalloc-512 /sys/slab/kmalloc-64 /sys/slab/kmalloc-8 /sys/slab/kmalloc-96 /sys/slab/mm_struct /sys/slab/mnt_cache /sys/slab/mqueue_inode_cache /sys/slab/names_cache /sys/slab/net_namespace /sys/slab/nfs_direct_cache /sys/slab/nfs_inode_cache /sys/slab/nfs_page /sys/slab/nfs_read_data /sys/slab/nfs_write_data /sys/slab/nfsd4_delegations /sys/slab/nfsd4_files /sys/slab/nfsd4_stateids /sys/slab/nfsd4_stateowners /sys/slab/nsproxy /sys/slab/pid /sys/slab/posix_timers_cache /sys/slab/proc_inode_cache /sys/slab/radix_tree_node /sys/slab/request_sock_TCP /sys/slab/revoke_record /sys/slab/revoke_table /sys/slab/rpc_buffers /sys/slab/rpc_inode_cache /sys/slab/rpc_tasks /sys/slab/scsi_cmd_cache /sys/slab/scsi_io_context /sys/slab/secpath_cache /sys/slab/sgpool-128 /sys/slab/sgpool-16 /sys/slab/sgpool-32 /sys/slab/sgpool-64 /sys/slab/sgpool-8 /sys/slab/shmem_inode_cache /sys/slab/sighand_cache /sys/slab/signal_cache /sys/slab/sigqueue /sys /slab/skbuff_fclone_cache /sys/slab/skbuff_head_cache /sys/slab/sock_inode_cache /sys/slab/sysfs_dir_cache /sys/slab/task_struct /sys/slab/tcp_bind_bucket /sys/slab/tw_sock_TCP /sys/slab/uhci_urb_priv /sys/slab/uid_cache /sys/slab/vm_area_struct /sys/slab/xfrm_dst_cache Christoph Lameter
2007-11-07 1:11 ` [patch 08/23] SLUB: Replace ctor field with ops field in /sys/slab/:0000008 /sys/slab/:0000016 /sys/slab/:0000024 /sys/slab/:0000032 /sys/slab/:0000040 /sys/slab/:0000048 /sys/slab/:0000056 /sys/slab/:0000064 /sys/slab/:0000072 /sys/slab/:0000080 /sys/slab/:0000088 /sys/slab/:0000096 /sys/slab/:0000104 /sys/slab/:0000128 /sys/slab/:0000144 /sys/slab/:0000184 /sys/slab/:0000192 /sys/slab/:0000216 /sys/slab/:0000256 /sys/slab/:0000344 /sys/slab/:0000384 /sys/slab/:0000448 /sys/slab/:0000512 /sys/slab/:0000768 /sys/slab/:0000968 /sys/slab/:0001024 /sys/slab/:0001152 /sys/slab/:0001312 /sys/slab/:0001536 /sys/slab/:0002048 /sys/slab/:0003072 /sys/slab/:0004096 /sys/slab/:a-0000016 /sys/slab/:a-0000024 /sys/slab/:a-0000056 /sys/slab/:a-0000080 /sys/slab/:a-0000128 /sys/slab/Acpi-Namesp ace /sys/slab/Acpi-Operand /sys/slab/Acpi-Parse /sys/slab/Acpi-ParseExt /sys/slab/Acpi-State /sys/ Christoph Lameter
2007-11-07 1:11 ` [patch 09/23] SLUB: Add get() and kick() methods Christoph Lameter
2007-11-07 1:11 ` Christoph Lameter
2007-11-07 2:37 ` Adrian Bunk
2007-11-07 2:37 ` Adrian Bunk
2007-11-07 3:07 ` Christoph Lameter
2007-11-07 3:07 ` Christoph Lameter
2007-11-07 3:26 ` Adrian Bunk
2007-11-07 3:26 ` Adrian Bunk
2007-11-07 1:11 ` [patch 10/23] SLUB: Sort slab cache list and establish maximum objects for defrag slabs Christoph Lameter
2007-11-07 1:11 ` Christoph Lameter
2007-11-07 1:11 ` [patch 11/23] SLUB: Slab defrag core Christoph Lameter
2007-11-07 1:11 ` Christoph Lameter
2007-11-07 22:13 ` Christoph Lameter
2007-11-07 22:13 ` Christoph Lameter
2007-11-07 1:11 ` [patch 12/23] SLUB: Trigger defragmentation from memory reclaim Christoph Lameter
2007-11-07 1:11 ` Christoph Lameter
2007-11-07 9:28 ` Johannes Weiner
2007-11-07 9:28 ` Johannes Weiner
2007-11-07 18:34 ` Christoph Lameter
2007-11-07 18:34 ` Christoph Lameter
2007-11-08 15:12 ` Mel Gorman
2007-11-08 15:12 ` Mel Gorman
2007-11-08 19:00 ` Christoph Lameter
2007-11-08 19:00 ` Christoph Lameter
2007-11-07 1:11 ` [patch 13/23] Buffer heads: Support slab defrag Christoph Lameter
2007-11-07 1:11 ` Christoph Lameter
2007-11-07 1:11 ` [patch 14/23] inodes: Support generic defragmentation Christoph Lameter
2007-11-07 1:11 ` Christoph Lameter
2007-11-07 10:17 ` Jörn Engel
2007-11-07 10:17 ` Jörn Engel
2007-11-07 10:31 ` Jörn Engel
2007-11-07 10:31 ` Jörn Engel
2007-11-07 10:35 ` Andreas Schwab
2007-11-07 10:35 ` Andreas Schwab
2007-11-07 10:35 ` Jörn Engel
2007-11-07 10:35 ` Jörn Engel
2007-11-07 18:40 ` Christoph Lameter
2007-11-07 18:51 ` Jörn Engel
2007-11-07 18:51 ` Jörn Engel
2007-11-07 19:00 ` Christoph Lameter
2007-11-07 1:11 ` [patch 15/23] FS: ExtX filesystem defrag Christoph Lameter
2007-11-07 1:11 ` Christoph Lameter
2007-11-07 1:11 ` [patch 16/23] FS: XFS slab defragmentation Christoph Lameter
2007-11-07 1:11 ` Christoph Lameter
2007-11-07 1:11 ` [patch 17/23] FS: Proc filesystem support for slab defrag Christoph Lameter
2007-11-07 1:11 ` Christoph Lameter
2007-11-07 1:11 ` [patch 18/23] FS: Slab defrag: Reiserfs support Christoph Lameter
2007-11-07 1:11 ` Christoph Lameter
2007-11-07 1:11 ` [patch 19/23] FS: Socket inode defragmentation Christoph Lameter
2007-11-07 1:11 ` Christoph Lameter
2007-11-07 1:11 ` [patch 20/23] dentries: Add constructor Christoph Lameter
2007-11-07 1:11 ` Christoph Lameter
2007-11-08 15:23 ` Mel Gorman
2007-11-08 15:23 ` Mel Gorman
2007-11-08 19:03 ` Christoph Lameter
2007-11-08 19:03 ` Christoph Lameter
2007-11-07 1:11 ` [patch 21/23] dentries: dentry defragmentation Christoph Lameter
2007-11-07 1:11 ` Christoph Lameter
2007-11-07 1:11 ` [patch 22/23] SLUB: Slab reclaim through Lumpy reclaim Christoph Lameter
2007-11-07 1:11 ` Christoph Lameter
2007-11-07 1:11 ` [patch 23/23] SLUB: Add SlabReclaimable() to avoid repeated reclaim attempts Christoph Lameter
2007-11-07 1:11 ` Christoph Lameter
2007-11-07 8:37 ` [patch 00/23] Slab defragmentation V6 Peter Zijlstra
2007-11-07 18:04 ` Christoph Lameter
2007-11-08 15:26 ` Mel Gorman
2007-11-08 15:26 ` Mel Gorman
2007-11-08 16:01 ` Plans for Onezonelist patch series ??? Lee Schermerhorn
2007-11-08 16:01 ` Lee Schermerhorn
2007-11-08 18:34 ` Christoph Lameter
2007-11-08 18:34 ` Christoph Lameter
2007-11-08 18:40 ` Mel Gorman
2007-11-08 18:40 ` Mel Gorman
2007-11-08 18:43 ` Christoph Lameter
2007-11-08 18:43 ` Christoph Lameter
2007-11-08 20:06 ` Mel Gorman
2007-11-08 20:06 ` Mel Gorman
2007-11-08 20:20 ` Christoph Lameter
2007-11-08 20:20 ` Christoph Lameter
2007-11-08 20:29 ` Mel Gorman
2007-11-08 20:29 ` Mel Gorman
2007-11-08 18:39 ` Mel Gorman
2007-11-08 18:39 ` Mel Gorman
2007-11-08 19:39 ` Christoph Lameter
2007-11-08 19:39 ` Christoph Lameter
2007-11-08 19:12 ` [patch 00/23] Slab defragmentation V6 Christoph Lameter
2007-11-08 19:12 ` Christoph Lameter
2007-11-08 20:24 ` Mel Gorman
2007-11-08 20:24 ` Mel Gorman
2007-11-08 20:28 ` Christoph Lameter
2007-11-08 20:28 ` Christoph Lameter
2007-11-08 20:58 ` Lee Schermerhorn
2007-11-08 20:58 ` Lee Schermerhorn
2007-11-08 21:27 ` Christoph Lameter
2007-11-08 21:27 ` Christoph Lameter
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