Date: Thu, 28 Jun 2018 12:47:05 -0400 From: Andrew Gallatin <gallatin@cs.duke.edu> To: Steevan Rodrigues <steevanxperia@gmail.com> Cc: freebsd-hackers@freebsd.org Subject: Re: high CPU usage in FreeBSD for a PCIe card driver Message-ID: <2ae78782-6cca-452e-d004-3999885ae4e0@cs.duke.edu> In-Reply-To: <CAKsGTHRdArYrT33KR6Kx4CqwsTR5MRaC%2BTQfV7yTuQej4_eOXQ@mail.gmail.com> References: <CAKsGTHR9AzX2v%2B%2BDbNCdt7RwxEfw8jKwndXzH9oxQEHvPszo%2Bw@mail.gmail.com> <a7caaecb-dd62-0c0f-e9ad-b83517bb3c7f@cs.duke.edu> <CAKsGTHRdArYrT33KR6Kx4CqwsTR5MRaC%2BTQfV7yTuQej4_eOXQ@mail.gmail.com>
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On 06/28/18 12:44, Steevan Rodrigues wrote: > Thank you so much for the suggestions . I will use these commands. > Yes, I am already working on to identify lock contentions. > > Re-built FreeBSD kernel by enabling lock profiling and now I am able to > see some issues with contention. > > Thanks > Steevan You need-not rebuild freebsd. lockstat is based on dtrace.. The lock profiling you're referring to is a different mechanism. Drew
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