Re: select(0,NULL,NULL,NULL,&t1) used for delay

Alex Riesen wrote:

Why don't you just use nanosleep(2) (or usleep)?

I can think of one main reason...existing code. Also, nanosleep() rounds up excessively in many kernel versions, so that a request to sleep for less than 1 tick ends up sleeping for 2 ticks.

The select() man page explicitly mentions this usage;

"Some code calls select with all three sets empty, n zero, and a non-null timeout as a fairly portable way to sleep with subsecond precision."

Chris

-
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: select(0,NULL,NULL,NULL,&t1) used for delay
    • From: Bob Copeland <[email protected]>
  • Re: select(0,NULL,NULL,NULL,&t1) used for delay
    • From: Bernd Petrovitsch <[email protected]>

• References:
  • select(0,NULL,NULL,NULL,&t1) used for delay
    • From: "Madhu K.S." <[email protected]>
  • Re: select(0,NULL,NULL,NULL,&t1) used for delay
    • From: Alex Riesen <[email protected]>

• Prev by Date: Re: 2.6.14-rc3-rt2
• Next by Date: Re: SMP syncronization on AMD processors (broken?)
• Previous by thread: Re: select(0,NULL,NULL,NULL,&t1) used for delay
• Next by thread: Re: select(0,NULL,NULL,NULL,&t1) used for delay
• 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]