Messages in this thread | | | Date | Mon, 30 Dec 2013 17:54:15 -0800 (PST) | From | PINTU KUMAR <> | Subject | Re: Help about calculating total memory consumption during booting |
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>________________________________ > From: Stefan Beller <stefanbeller@googlemail.com> >To: PINTU KUMAR <pintu_agarwal@yahoo.com>; "linux-mm@kvack.org" <linux-mm@kvack.org>; "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>; "mgorman@suse.de" <mgorman@suse.de> >Sent: Monday, 30 December 2013 1:55 AM >Subject: Re: Help about calculating total memory consumption during booting > > >On 29.12.2013 19:17, PINTU KUMAR wrote: >> Hi, >> >> I need help in roughly calculating the total memory consumption in an embedded Linux system just after booting is finished. >> I know, I can see the memory stats using "free" and "/proc/meminfo" >> >> But, I need the breakup of "Used" memory during bootup, for both kernel space and user application. >> >> Example, on my ARM machine with 128MB RAM, the free memory reported is roughly: >> Total: 90MB >> Used: 88MB >> Free: 2MB >> Buffer+Cached: (5+19)MB >> >> Now, my question is, how to find the breakup of this "Used" memory of "88MB". >> This should include both kernel space allocation and user application allocation(including daemons). >> > >http://www.linuxatemyram.com/ dont panic ;) > >How about htop, top or >"valgrind --tool massif" > >
Thanks for the reply, I know about top, but top does not help much in arriving at the total memory consumption.
I need the physical memory usage breakup of each process during bootup, with a segregate of user and kernel allocation.
1) If I add up all "Pss" field in "proc/<PID>/smaps, do I get the total Used memory? 2) Is the Pss value includes the kernel side allocation as well? 3) What fields I should choose from /proc/meminfo" to correctly arrive at the "Used" memory in the system? 4) What about the memory allocation for kernel threads during booting? Why does its Pss/Rss value shows 0 always
I already tried adding up all "PSS" values in every PIDs, but still it does not match any where near to the total used memory in the system.
Please help.
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