understanding linux cache and free command

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hi All,

I have created few memory cache areas using "kmem_cache_create" and using it to allocate some memory.

What I observe after some cache_alloc's and cache_free's is that /proc/slabinfo entries for my objects are good, meaning the number of objects go back to 0 after they are freed.

But linux "free" command shows that some of the objects are cached and that keeps on increasing. I am not able to understand this behavior. Is it that kernel keeps the cache objects even after they are freed?

#cat /proc/slabinfo
my_cache 200 200 4096 1 1 : tunables 24 12 8 : slabdata 200 200 0

It shows 200 allocated objects from "my_cache"

and

#free -lm

            total       used       free     shared    buffers     cached
Mem:         48340        610      47730          0         96       130

the cached objects keep on growing.

After 5 mins in which I am doing some alloc and free-
            total       used       free     shared    buffers     cached
Mem:        48340        616      47723          0         96        137

/proc/slabinfo remains the same.

Any help is appreciated.

Thanks,
Prashant
--
To unsubscribe from this list: send the line "unsubscribe linux-newbie" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.linux-learn.org/faqs


[Index of Archives]     [Audio]     [Hams]     [Kernel Newbies]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Samba]     [Video 4 Linux]     [Fedora Users]

  Powered by Linux