Hi, PC
Thank you every much!
-Original Message-
From: Paul Clarke [mailto:p...@us.ibm.com]
Sent: 2019年4月15日 20:53
To: Linhaifeng ; linux-perf-us...@vger.kernel.org;
linux-kernel@vger.kernel.org
Subject: Re: perf tools:Is there any tools to found out the max latency by irq
or cpu idle
any tools to found out the max latency by irq
or cpu idle
Em Mon, Apr 15, 2019 at 07:52:59AM -0500, Paul Clarke escreveu:
> On 4/13/19 1:01 AM, Linhaifeng wrote:
> > Sorry, the value 131081408 is just for example. Actually the result is like
> > this:
> > sqrt 2019-04-10 23
Em Mon, Apr 15, 2019 at 07:52:59AM -0500, Paul Clarke escreveu:
> On 4/13/19 1:01 AM, Linhaifeng wrote:
> > Sorry, the value 131081408 is just for example. Actually the result is like
> > this:
> > sqrt 2019-04-10 23:53:50: 43968
> > sqrt 2019-04-10 23:53:51: 44060
> > sqrt 2019-04-10 23:53:52:
.com]
> Sent: 2019年4月12日 22:06
> To: Linhaifeng ; linux-perf-us...@vger.kernel.org;
> linux-kernel@vger.kernel.org
> Subject: Re: perf tools:Is there any tools to found out the max latency by
> irq or cpu idle
>
> On 4/11/19 8:57 PM, Linhaifeng wrote:
>> Hi,
>> I have a
g;
> linux-kernel@vger.kernel.org
> Subject: Re: perf tools:Is there any tools to found out the max latency by
> irq or cpu idle
>
> On 4/11/19 8:57 PM, Linhaifeng wrote:
>> Hi,
>> I have a single thread application like this:
>>
>> While (1) {
>> s
-us...@vger.kernel.org;
linux-kernel@vger.kernel.org
Subject: Re: perf tools:Is there any tools to found out the max latency by irq
or cpu idle
On 4/11/19 8:57 PM, Linhaifeng wrote:
> Hi,
> I have a single thread application like this:
>
> While (1) {
> start = rdtsc();
&
On 4/11/19 8:57 PM, Linhaifeng wrote:
> Hi,
> I have a single thread application like this:
>
> While (1) {
> start = rdtsc();
> sqrt (1024);
> end = rdtsc();
> cycles = end – start;
> printf("cycles: %d-%02d-%02d %02d:%02d:%02d: %lu\n",
> 1900+timeinfo->tm_year, 1+time
7 matches
Mail list logo
