Re: [this_cpu_xx V6 7/7] this_cpu: slub aggressive use of this_cpu operations in the hotpaths | KernelTrap

Re: [this_cpu_xx V6 7/7] this_cpu: slub aggressive use of this_cpu operations in the hotpaths

view
thread

Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]

[view in full thread]

From: Christoph Lameter

Subject: Re: [this_cpu_xx V6 7/7] this_cpu: slub aggressive use of this_cpu operations in the hotpaths

Date: Tuesday, October 13, 2009 - 7:43 am

On Tue, 13 Oct 2009, David Rientjes wrote:

quoted text> I ran 60-second netperf TCP_RR benchmarks with various thread counts over
> two machines, both four quad-core Opterons.  I ran the trials ten times
> each with both vanilla per-cpu#for-next at 9288f99 and with v6 of this
> patchset.  The transfer rates were virtually identical showing no
> improvement or regression with this patchset in this benchmark.
>
>  [ As I reported in http://marc.info/?l=linux-kernel&m=123839191416472,
>    this benchmark continues to be the most significant regression slub has
>    compared to slab. ]

Hmmm... Last time I ran the in kernel benchmarks this showed a reduction
in cycle counts. Did not get to get my tests yet.

Can you also try the irqless hotpath?

--
unsubscribe noticeTo unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]

Messages in current thread:

[this_cpu_xx V6 0/7] Introduce per cpu atomic operations a ..., cl, (Wed Oct 7, 2:10 pm)

[this_cpu_xx V6 1/7] this_cpu_ops: page allocator conversion, cl, (Wed Oct 7, 2:10 pm)

[this_cpu_xx V6 2/7] this_cpu ops: Remove pageset_notifier, cl, (Wed Oct 7, 2:10 pm)

[this_cpu_xx V6 3/7] Use this_cpu operations in slub, cl, (Wed Oct 7, 2:10 pm)

[this_cpu_xx V6 4/7] SLUB: Get rid of dynamic DMA kmalloc ..., cl, (Wed Oct 7, 2:10 pm)

[this_cpu_xx V6 6/7] Make slub statistics use this_cpu_inc, cl, (Wed Oct 7, 2:10 pm)

[this_cpu_xx V6 7/7] this_cpu: slub aggressive use of this ..., cl, (Wed Oct 7, 2:10 pm)

Re: [this_cpu_xx V6 1/7] this_cpu_ops: page allocator conv ..., Tejun Heo, (Thu Oct 8, 3:38 am)

Re: [this_cpu_xx V6 1/7] this_cpu_ops: page allocator conv ..., Tejun Heo, (Thu Oct 8, 3:40 am)

Re: [this_cpu_xx V6 1/7] this_cpu_ops: page allocator conv ..., Mel Gorman, (Thu Oct 8, 3:53 am)

Re: [this_cpu_xx V6 1/7] this_cpu_ops: page allocator conv ..., Christoph Lameter, (Thu Oct 8, 9:15 am)

Re: [this_cpu_xx V6 3/7] Use this_cpu operations in slub, Tejun Heo, (Mon Oct 12, 3:19 am)

Re: [this_cpu_xx V6 3/7] Use this_cpu operations in slub, Tejun Heo, (Mon Oct 12, 3:21 am)

Re: [this_cpu_xx V6 7/7] this_cpu: slub aggressive use of ..., Tejun Heo, (Mon Oct 12, 3:40 am)

Re: [this_cpu_xx V6 7/7] this_cpu: slub aggressive use of ..., Pekka Enberg, (Mon Oct 12, 6:14 am)

Re: [this_cpu_xx V6 3/7] Use this_cpu operations in slub, Christoph Lameter, (Mon Oct 12, 7:54 am)

Re: [this_cpu_xx V6 7/7] this_cpu: slub aggressive use of ..., Christoph Lameter, (Mon Oct 12, 7:55 am)

Re: [this_cpu_xx V6 3/7] Use this_cpu operations in slub, Tejun Heo, (Mon Oct 12, 7:13 pm)

Re: [this_cpu_xx V6 7/7] this_cpu: slub aggressive use of ..., David Rientjes, (Tue Oct 13, 2:45 am)

Re: [this_cpu_xx V6 3/7] Use this_cpu operations in slub, Christoph Lameter, (Tue Oct 13, 7:41 am)

Re: [this_cpu_xx V6 7/7] this_cpu: slub aggressive use of ..., Christoph Lameter, (Tue Oct 13, 7:43 am)

Re: [this_cpu_xx V6 3/7] Use this_cpu operations in slub, Tejun Heo, (Tue Oct 13, 7:56 am)

Re: [this_cpu_xx V6 3/7] Use this_cpu operations in slub, Christoph Lameter, (Tue Oct 13, 8:20 am)

Re: [this_cpu_xx V6 0/7] Introduce per cpu atomic operatio ..., Mel Gorman, (Tue Oct 13, 8:40 am)

Re: [this_cpu_xx V6 0/7] Introduce per cpu atomic operatio ..., Christoph Lameter, (Tue Oct 13, 8:45 am)

Re: [this_cpu_xx V6 0/7] Introduce per cpu atomic operatio ..., Mel Gorman, (Tue Oct 13, 9:09 am)

Re: [this_cpu_xx V6 0/7] Introduce per cpu atomic operatio ..., Christoph Lameter, (Tue Oct 13, 10:17 am)

[FIX] patch "SLUB: Get rid of dynamic DMA kmalloc cache al ..., Christoph Lameter, (Tue Oct 13, 11:48 am)

Re: [this_cpu_xx V6 7/7] this_cpu: slub aggressive use of ..., Christoph Lameter, (Tue Oct 13, 12:14 pm)

Re: [this_cpu_xx V6 7/7] this_cpu: slub aggressive use of ..., Pekka Enberg, (Tue Oct 13, 12:44 pm)

Re: [this_cpu_xx V6 7/7] this_cpu: slub aggressive use of ..., Christoph Lameter, (Tue Oct 13, 12:48 pm)

Re: [this_cpu_xx V6 7/7] this_cpu: slub aggressive use of ..., David Rientjes, (Tue Oct 13, 1:15 pm)

Re: [this_cpu_xx V6 7/7] this_cpu: slub aggressive use of ..., Christoph Lameter, (Tue Oct 13, 1:25 pm)

Re: [this_cpu_xx V6 7/7] this_cpu: slub aggressive use of ..., Christoph Lameter, (Tue Oct 13, 1:28 pm)

Re: [this_cpu_xx V6 7/7] this_cpu: slub aggressive use of ..., David Rientjes, (Tue Oct 13, 3:53 pm)

Re: [this_cpu_xx V6 7/7] this_cpu: slub aggressive use of ..., David Rientjes, (Tue Oct 13, 6:33 pm)

Re: [this_cpu_xx V6 3/7] Use this_cpu operations in slub, Tejun Heo, (Tue Oct 13, 6:57 pm)

Re: [this_cpu_xx V6 7/7] this_cpu: slub aggressive use of ..., Mel Gorman, (Wed Oct 14, 6:34 am)

Re: [this_cpu_xx V6 7/7] this_cpu: slub aggressive use of ..., Christoph Lameter, (Wed Oct 14, 7:08 am)

Re: [this_cpu_xx V6 3/7] Use this_cpu operations in slub, Christoph Lameter, (Wed Oct 14, 7:14 am)

Re: [this_cpu_xx V6 7/7] this_cpu: slub aggressive use of ..., Mel Gorman, (Wed Oct 14, 8:49 am)

Re: [this_cpu_xx V6 7/7] this_cpu: slub aggressive use of ..., Pekka Enberg, (Wed Oct 14, 8:53 am)

Re: [this_cpu_xx V6 7/7] this_cpu: slub aggressive use of ..., Christoph Lameter, (Wed Oct 14, 8:56 am)

Re: [this_cpu_xx V6 7/7] this_cpu: slub aggressive use of ..., Pekka Enberg, (Wed Oct 14, 9:14 am)

Re: [this_cpu_xx V6 7/7] this_cpu: slub aggressive use of ..., Christoph Lameter, (Wed Oct 14, 11:19 am)

Re: [this_cpu_xx V6 3/7] Use this_cpu operations in slub, Tejun Heo, (Thu Oct 15, 12:47 am)

Re: [this_cpu_xx V6 7/7] this_cpu: slub aggressive use of ..., David Rientjes, (Thu Oct 15, 2:03 am)

Re: [this_cpu_xx V6 7/7] this_cpu: slub aggressive use of ..., Mel Gorman, (Fri Oct 16, 3:50 am)

Re: [this_cpu_xx V6 3/7] Use this_cpu operations in slub, Christoph Lameter, (Fri Oct 16, 9:44 am)

Re: [this_cpu_xx V6 7/7] this_cpu: slub aggressive use of ..., Christoph Lameter, (Fri Oct 16, 9:45 am)

Re: [this_cpu_xx V6 7/7] this_cpu: slub aggressive use of ..., David Rientjes, (Fri Oct 16, 11:40 am)

Re: [this_cpu_xx V6 7/7] this_cpu: slub aggressive use of ..., David Rientjes, (Fri Oct 16, 11:43 am)

Re: [this_cpu_xx V6 7/7] this_cpu: slub aggressive use of ..., Christoph Lameter, (Fri Oct 16, 11:50 am)

Re: [this_cpu_xx V6 3/7] Use this_cpu operations in slub, Tejun Heo, (Sat Oct 17, 8:11 pm)