RE: perf tools:Is there any tools to found out the max latency by irq or cpu idle

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

RE: perf tools:Is there any tools to found out the max latency by irq or cpu idle

SMI# -0.2% 90 4472.483413712 seconds time elapsed -Original Message- From: Arnaldo Carvalho de Melo [mailto:arnaldo.m...@gmail.com] Sent: 2019年4月16日 1:59 To: Paul Clarke Cc: Linhaifeng ; linux-perf-us...@vger.kernel.org; linux-kernel@vger.kernel.org Subject: Re: perf tools:Is there

RE: perf tools:Is there any tools to found out the max latency by irq or cpu idle

-10 23:53:56: 46704 sqrt 2019-04-10 23:53:57: 46880 sqrt 2019-04-10 23:53:58: 44332 …… sqrt 2019-04-10 02:17:15: 136345876 …… sqrt 2019-04-10 04:40:35: 136335644 …… -Original Message- From: William Cohen [mailto:wco...@redhat.com] Sent: 2019年4月12日 22:06 To: Linhaifeng ; linux-perf

perf tools:Is there any tools to found out the max latency by irq or cpu idle

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+timeinfo->tm_mon, timeinfo->tm_mday, timeinfo->tm_hour, timei

LLC cache miss increases with the increases of hugepages

Hi， I did a network forward test with ovs-dpdk, and found that LLC cache miss increases with the increases of hugepages. ovs-dpdk only use 4 hugepages, hugepage size is 1G.Why LLC cache miss increases ? I just echo more hugepages but haven't been used yet. some informations: CPU: Intel(R) Xeon(R