From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Niels Christiansen" Date: Wed, 30 Jan 2002 07:27:46 +0000 Subject: Re: [Linux-ia64] What's taking all the system time..? Message-Id: List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org Oops, forgot to mention these two lines. They represent trace overhead because my kernel is instrumented to trace all function entry and exit points. All it means is that 9.92 + 9.33 percent of the time spent in your process is trace overhead. It should not skew the relative weight of the other profile data. 4696 9.92 2.38 kernel __cyg_profile_func_enter [] 4416 9.33 2.24 kernel __cyg_profile_func_exit [] I also checked lock stats. You wait for and hold locks less than 150 msecs. What I can't explain is why the system is 60% busy (although I know that ACPI handlers keep one processor 100% busy). ----------------------------------------------------------------- LTC Whydle Version 1.0.3 *** PROCESSOR TIME DISTRIBUTION ----------------------------------------------------------------- Total TID-0 Other non-IRQ CPU Idle % Busy % IRQ % IRQ % Busy % --- ------- ------- ------- ------- ------- 0 62.649 37.351 0.000 0.000 37.351 1 43.502 56.498 0.000 0.000 56.498 2 0.000 100.000 0.000 0.000 100.000 3 55.906 44.094 0.000 0.000 44.094 ------- ------- ------- ------- ------- 40.514 59.486 0.000 0.000 59.486 ... Niels