linux-kernel - Issues in Linux HPET example

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Message-ID: <AANLkTi=CvnJ7oKoaj1_NjegdvbEoiBtmnVn-xEL8e2D3@mail.gmail.com>
Date:	Wed, 1 Sep 2010 18:17:23 +0530
From:	Jaswinder Singh Rajput <jaswinderlinux@...il.com>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"the arch/x86 maintainers" <x86@...nel.org>
Subject: Issues in Linux HPET example

Hello,

By executing Documentation/timers/hpet_example.c

for polling, I requested for 3 iterations but it seems iteration work
for only 2 as first expired time is always very small.

[root@...book timers]# ./hpet_example poll /dev/hpet 10 3
-hpet: executing poll
hpet_poll: info.hi_flags 0x0
hpet_poll: expired time = 0x13
hpet_poll: revents = 0x1
hpet_poll: data 0x1
hpet_poll: expired time = 0x1868c
hpet_poll: revents = 0x1
hpet_poll: data 0x1
hpet_poll: expired time = 0x18645
hpet_poll: revents = 0x1
hpet_poll: data 0x1
[root@...book timers]#

for fasync, I requested for 3 iterations but it shows 4 counts.

[root@...book timers]# ./hpet_example fasync /dev/hpet 10 3
-hpet: executing fasync
hpet_fasync: info.hi_flags 0x0
hpet_sigio: called
hpet_sigio: called
hpet_fasync: count = 2
hpet_sigio: called
hpet_fasync: count = 3
hpet_sigio: called
hpet_fasync: count = 4
[root@...book timers]#

How can I fix these issues.

Thanks,
--
Jaswinder Singh.
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