>________________________________ > From: Stefan Beller <stefanbel...@googlemail.com> >To: PINTU KUMAR <pintu_agar...@yahoo.com>; "linux...@kvack.org" ><linux...@kvack.org>; "linux-kernel@vger.kernel.org" ><linux-kernel@vger.kernel.org>; "mgor...@suse.de" <mgor...@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. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
