[Users] Some observations from ploop testing

[Kirill Korotaev]

Exactly. It's fixed in next kernel version. Sorry for that.

Btw, when comparing performance be aware that disk performance depends a lot on placement. Disk beginning is typically around 2x faster.

Sent from my iPhone

On 25.03.2012, at 0:21, "jjs - mainphrame" <jjs at mainphrame.com<mailto:jjs at mainphrame.com>> wrote:

I'm running slabtop every 30 seconds during a dbench run and the thing that is growing the fastest and taking the lion's share is biovec-256 - you can see it growing at 30 second intervals.

     OBJS ACTIVE  USE  OBJ SIZE  SLABS  OBJ/SLAB CACHE SIZE NAME
        88     58  65%    3.00K     44        2       352K biovec-2
   134     96  71%    3.00K     67        2       536K biovec-2
   152    100  65%    3.00K     76        2       608K biovec-2
   112     74  66%    3.00K     56        2       448K biovec-2
   140     94  67%    3.00K     70        2       560K biovec-2
    74     56  75%    3.00K     37        2       296K biovec-2
   144    102  70%    3.00K     72        2       576K biovec-2
   114     82  71%    3.00K     57        2       456K biovec-2
   154    116  75%    3.00K     77        2       616K biovec-2
    80     60  75%    3.00K     40        2       320K biovec-2
   164    122  74%    3.00K     82        2       656K biovec-2
   152    114  75%    3.00K     76        2       608K biovec-2
    70     46  65%    3.00K     35        2       280K biovec-2
  1004   1004 100%    3.00K    502        2      4016K biovec-2
  1952   1952 100%    3.00K    976        2      7808K biovec-2
  2946   2946 100%    3.00K   1473        2     11784K biovec-2
  3876   3876 100%    3.00K   1938        2     15504K biovec-2
  4858   4858 100%    3.00K   2429        2     19432K biovec-2
  5844   5844 100%    3.00K   2922        2     23376K biovec-2
  6782   6782 100%    3.00K   3391        2     27128K biovec-2
  7766   7766 100%    3.00K   3883        2     31064K biovec-2
  8774   8774 100%    3.00K   4387        2     35096K biovec-2
  9774   9774 100%    3.00K   4887        2     39096K biovec-2
 10750  10750 100%    3.00K   5375        2     43000K biovec-2
 11696  11696 100%    3.00K   5848        2     46784K biovec-2
 12700  12700 100%    3.00K   6350        2     50800K biovec-2
 13676  13676 100%    3.00K   6838        2     54704K biovec-2
 14644  14644 100%    3.00K   7322        2     58576K biovec-2
 15620  15620 100%    3.00K   7810        2     62480K biovec-2
 16568  16568 100%    3.00K   8284        2     66272K biovec-2
 17582  17582 100%    3.00K   8791        2     70328K biovec-2
 18562  18562 100%    3.00K   9281        2     74248K biovec-2
 19558  19558 100%    3.00K   9779        2     78232K biovec-2
 20500  20500 100%    3.00K  10250        2     82000K biovec-2
 21424  21424 100%    3.00K  10712        2     85696K biovec-2
 22414  22414 100%    3.00K  11207        2     89656K biovec-2
 23404  23404 100%    3.00K  11702        2     93616K biovec-2
 25252  25252 100%    3.00K  12626        2    101008K biovec-2
 27192  27192 100%    3.00K  13596        2    108768K biovec-2
 29172  29172 100%    3.00K  14586        2    116688K biovec-2
 31112  31112 100%    3.00K  15556        2    124448K biovec-2
 33006  33006 100%    3.00K  16503        2    132024K biovec-2
 34998  34926  99%    3.00K  17499        2    139992K biovec-2
 36820  36820 100%    3.00K  18410        2    147280K biovec-2
 38750  38750 100%    3.00K  19375        2    155000K biovec-2
 40480  40480 100%    3.00K  20240        2    161920K biovec-2
 42362  42362 100%    3.00K  21181        2    169448K biovec-2
 44264  44264 100%    3.00K  22132        2    177056K biovec-2
 46182  46182 100%    3.00K  23091        2    184728K biovec-2
 48058  48058 100%    3.00K  24029        2    192232K biovec-2
 49982  49974  99%    3.00K  24991        2    199928K biovec-2
 51894  51894 100%    3.00K  25947        2    207576K biovec-2
 53828  53808  99%    3.00K  26914        2    215312K biovec-2
 55596  55596 100%    3.00K  27798        2    222384K biovec-2
 57484  57484 100%    3.00K  28742        2    229936K biovec-2
 59352  59352 100%    3.00K  29676        2    237408K biovec-2
 61304  61286  99%    3.00K  30652        2    245216K biovec-2

Joe

On Sat, Mar 24, 2012 at 11:40 AM, Kirill Korotaev <dev at parallels.com<mailto:dev at parallels.com>> wrote:
Can you please report slabtop output? We've just fixed obe memory leak. Thanks!

Sent from my iPhone

On 24.03.2012, at 21:57, "jjs - mainphrame" <jjs at mainphrame.com<mailto:jjs at mainphrame.com>> wrote:

> I've been creating simfs and ploop based containers and exercising them in different ways. While the ploop-based containers are basically working, in my testing a ploop-based CT seems to require more resources than an equivalent simfs-based CT. On my modest 32 bit test rig with 1 GB RAM, I've been running dbench on simfs based CTs and looking at performance with new kernel versions. But when running dbench tests on a ploop based CT with the same resources, it has not been able to finish because the machine runs out of resources, performance slows to a crawl and even host processes are killed off.
>
> I'll try to get some more memory for this machine for further testing.
>
> Regards,
>
> Joe
> <ATT00001.c>

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