diff options
| author |   Richard Henderson <rth@twiddle.net> | 2013-07-12 16:15:56 -0700 |
|---|---|---|
| committer |   Matt Turner <mattst88@gmail.com> | 2013-11-16 16:33:13 -0800 |
| commit | fddd87d6e135924b92499917bace103e46c22d00 (patch) | |
| tree | 23bbe6a01a32c0ea88f7c2180dbd1f461d822c76 /arch/alpha/kernel/setup.c | |
| parent | alpha: Notice if we're being run under QEMU (diff) | |
| download | wireguard-linux-fddd87d6e135924b92499917bace103e46c22d00.tar.xz wireguard-linux-fddd87d6e135924b92499917bace103e46c22d00.zip | |
alpha: Allow HZ to be configured
With the 1024Hz default, we spend 50% of QEMU emulation
processing timer interrupts.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'arch/alpha/kernel/setup.c')
| -rw-r--r-- | arch/alpha/kernel/setup.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/arch/alpha/kernel/setup.c b/arch/alpha/kernel/setup.c index c38d6a1b9066..b20af76f12c1 100644 --- a/arch/alpha/kernel/setup.c +++ b/arch/alpha/kernel/setup.c @@ -1218,6 +1218,7 @@ show_cpuinfo(struct seq_file *f, void *slot) char *systype_name; char *sysvariation_name; int nr_processors; + unsigned long timer_freq; cpu_index = (unsigned) (cpu->type - 1); cpu_name = "Unknown"; @@ -1229,6 +1230,12 @@ show_cpuinfo(struct seq_file *f, void *slot) nr_processors = get_nr_processors(cpu, hwrpb->nr_processors); +#if CONFIG_HZ == 1024 || CONFIG_HZ == 1200 + timer_freq = (100UL * hwrpb->intr_freq) / 4096; +#else + timer_freq = 100UL * CONFIG_HZ; +#endif + seq_printf(f, "cpu\t\t\t: Alpha\n" "cpu model\t\t: %s\n" "cpu variation\t\t: %ld\n" @@ -1254,8 +1261,7 @@ show_cpuinfo(struct seq_file *f, void *slot) (char*)hwrpb->ssn, est_cycle_freq ? : hwrpb->cycle_freq, est_cycle_freq ? "est." : "", - hwrpb->intr_freq / 4096, - (100 * hwrpb->intr_freq / 4096) % 100, + timer_freq / 100, timer_freq % 100, hwrpb->pagesize, hwrpb->pa_bits, hwrpb->max_asn, |