Messages in this thread Patch in this message | | | Date | Wed, 18 Aug 2004 14:27:03 +0200 | From | Ingo Molnar <> | Subject | Re: [patch] voluntary-preempt-2.6.8.1-P3 |
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* Florian Schmidt <mista.tapas@gmx.net> wrote:
> Hi, it applied against 2.6.8.1 with some offsets and some buzz [?]. > Well anyways it compiled fine and the copy_page_range latency is > gone.. Now i also see the extracty entropy thing, too..
could you try the attached patch that changes SHA_CODE_SIZE to 3 - does this reduce the latency caused by extract_entropy?
> Btw: one question: at one point in time the IRQ handlers were in the > SCHED_FIFO scheduling class. Why has this changed?
so that they dont starve the audio threads by default - the audio IRQ has to get another priority anyway. Maybe we could try a default SCHED_FIFO prio lower than the typical rt_priority of jackd - e.g. 30?
Ingo --- linux/drivers/char/random.c.orig +++ linux/drivers/char/random.c @@ -942,7 +942,7 @@ EXPORT_SYMBOL(add_disk_randomness); #define HASH_TRANSFORM SHATransform /* Various size/speed tradeoffs are available. Choose 0..3. */ -#define SHA_CODE_SIZE 0 +#define SHA_CODE_SIZE 3 /* * SHA transform algorithm, taken from code written by Peter Gutmann,
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