How check a tile server is working right??

I have a server configurated and running. If I try http://server/mod_tile

NoResp200: 0
NoResp304: 0
NoResp404: 0
NoResp503: 0
NoResp5XX: 0
NoRespOther: 0
NoFreshCache: 0
NoOldCache: 0
NoVeryOldCache: 0
NoFreshRender: 0
NoOldRender: 0
NoVeryOldRender: 0
NoRespZoom00: 0
NoRespZoom01: 0
NoRespZoom02: 0
NoRespZoom03: 0
NoRespZoom04: 0
NoRespZoom05: 0
NoRespZoom06: 0
NoRespZoom07: 0
NoRespZoom08: 0
NoRespZoom09: 0
NoRespZoom10: 0
NoRespZoom11: 0
NoRespZoom12: 0
NoRespZoom13: 0
NoRespZoom14: 0
NoRespZoom15: 0
NoRespZoom16: 0
NoRespZoom17: 0
NoRespZoom18: 0
NoTileBufferReads: 0
DurationTileBufferReads: 0
NoTileBufferReadZoom00: 0
DurationTileBufferReadZoom00: 0
NoTileBufferReadZoom01: 0
DurationTileBufferReadZoom01: 0
NoTileBufferReadZoom02: 0
DurationTileBufferReadZoom02: 0
NoTileBufferReadZoom03: 0
DurationTileBufferReadZoom03: 0
NoTileBufferReadZoom04: 0
DurationTileBufferReadZoom04: 0
NoTileBufferReadZoom05: 0
DurationTileBufferReadZoom05: 0
NoTileBufferReadZoom06: 0
DurationTileBufferReadZoom06: 0
NoTileBufferReadZoom07: 0
DurationTileBufferReadZoom07: 0
NoTileBufferReadZoom08: 0
DurationTileBufferReadZoom08: 0
NoTileBufferReadZoom09: 0
DurationTileBufferReadZoom09: 0
NoTileBufferReadZoom10: 0
DurationTileBufferReadZoom10: 0
NoTileBufferReadZoom11: 0
DurationTileBufferReadZoom11: 0
NoTileBufferReadZoom12: 0
DurationTileBufferReadZoom12: 0
NoTileBufferReadZoom13: 0
DurationTileBufferReadZoom13: 0
NoTileBufferReadZoom14: 0
DurationTileBufferReadZoom14: 0
NoTileBufferReadZoom15: 0
DurationTileBufferReadZoom15: 0
NoTileBufferReadZoom16: 0
DurationTileBufferReadZoom16: 0
NoTileBufferReadZoom17: 0
DurationTileBufferReadZoom17: 0
NoTileBufferReadZoom18: 0
DurationTileBufferReadZoom18: 0
NoRes200Layer/osm_tiles/: 0
NoRes404Layer/osm_tiles/: 0

If I try http://localhost/osm_tiles/0/0/0.png

I get a world map image. What I really want is to integrate this tile server with Marble widget, but before doing that I would like to check the renderd and tile_mod are working fine, and they supplay the tiles I need. How can I check this feature?