Re: [PATCH RT 00/02] SLOB optimizations

that's just the profiling interrupt hitting them. You should not analyze irq-safe code with a non-NMI profiling interrupt.

CLI/STI is extremely fast. (In fact in the -rt tree i'm using them within mutexes instead of preempt_enable()/preempt_disable(), because they are faster and generate less register side-effect.)

Hm... I rather thought that the cli would cause a rather large hit on the pipeline and certainly on OOE. Is your observation based on any particular instruction stream? Sti, on the otherhand should be fast...

--
George Anzinger   [email protected]
HRT (High-res-timers):  http://sourceforge.net/projects/high-res-timers/
-
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 RT 00/02] SLOB optimizations
    • From: Eric Dumazet <[email protected]>

• References:
  • Re: 2.6.15-rc5-rt2 slowness
    • From: Steven Rostedt <[email protected]>
  • [PATCH RT 00/02] SLOB optimizations
    • From: Steven Rostedt <[email protected]>
  • Re: [PATCH RT 00/02] SLOB optimizations
    • From: Matt Mackall <[email protected]>
  • Re: [PATCH RT 00/02] SLOB optimizations
    • From: Steven Rostedt <[email protected]>
  • Re: [PATCH RT 00/02] SLOB optimizations
    • From: Pekka Enberg <[email protected]>
  • Re: [PATCH RT 00/02] SLOB optimizations
    • From: Steven Rostedt <[email protected]>
  • Re: [PATCH RT 00/02] SLOB optimizations
    • From: Ingo Molnar <[email protected]>
  • Re: [PATCH RT 00/02] SLOB optimizations
    • From: Eric Dumazet <[email protected]>
  • Re: [PATCH RT 00/02] SLOB optimizations
    • From: Ingo Molnar <[email protected]>
  • Re: [PATCH RT 00/02] SLOB optimizations
    • From: Eric Dumazet <[email protected]>
  • Re: [PATCH RT 00/02] SLOB optimizations
    • From: Ingo Molnar <[email protected]>

• Prev by Date: Re: [PATCH] ia64: disable preemption in udelay()
• Next by Date: Re: [patch 2/2] /dev/mem validate mmap requests
• Previous by thread: Re: [PATCH RT 00/02] SLOB optimizations
• Next by thread: Re: [PATCH RT 00/02] SLOB optimizations
• 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]