Re: [PATCH] SLUB use cmpxchg_local

On Tue, 21 Aug 2007, Mathieu Desnoyers wrote:

> - Rounding error.. you seem to round at 0.1ms, but I keep the values in
>   cycles. The times that you get (1.1ms) seems strangely higher than
>   mine, which are under 1000 cycles on a 3GHz system (less than 333ns).
>   I guess there is both a ms - ns error there and/or not enough
>   precision in your numbers.

Nope the rounding for output is depending on the amount. Rounds to one 
digit after whatever unit we figured out is best to display.

And multiplications (cyc2ns) do not result in rounding errors.

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

---

• Follow-Ups:
  • Re: [PATCH] SLUB use cmpxchg_local
    • From: Mathieu Desnoyers <[email protected]>

• References:
  • Re: [patch 01/23] Fall back on interrupt disable in cmpxchg8b on 80386 and 80486
    • From: Mathieu Desnoyers <[email protected]>
  • Re: [patch 01/23] Fall back on interrupt disable in cmpxchg8b on 80386 and 80486
    • From: Christoph Lameter <[email protected]>
  • [PATCH] SLUB use cmpxchg_local
    • From: Mathieu Desnoyers <[email protected]>
  • Re: [PATCH] SLUB use cmpxchg_local
    • From: Christoph Lameter <[email protected]>
  • Re: [PATCH] SLUB use cmpxchg_local
    • From: Mathieu Desnoyers <[email protected]>
  • Re: [PATCH] SLUB use cmpxchg_local
    • From: Christoph Lameter <[email protected]>
  • Re: [PATCH] SLUB use cmpxchg_local
    • From: Mathieu Desnoyers <[email protected]>
  • Re: [PATCH] SLUB use cmpxchg_local
    • From: Christoph Lameter <[email protected]>
  • Re: [PATCH] SLUB use cmpxchg_local
    • From: Mathieu Desnoyers <[email protected]>
  • Re: [PATCH] SLUB use cmpxchg_local
    • From: Christoph Lameter <[email protected]>
  • Re: [PATCH] SLUB use cmpxchg_local
    • From: Mathieu Desnoyers <[email protected]>

• Prev by Date: Re: [PATCH][2.6.23-rc2-mm2] small fix for ia64 icache sync patch
• Next by Date: Please pull from 'fixes-2.6.23' branch
• Previous by thread: Re: [PATCH] SLUB use cmpxchg_local
• Next by thread: Re: [PATCH] SLUB use cmpxchg_local
• Index(es):
  • Date
  • Thread

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]