[Linux]Neverending Memory Leak Problem

[mezka]

There's all kinds of memory leaks in the Linux Client, that's why at the beginning of the match the FPS are great but as long as the match progresses the FPS gets worse.

As the executable gets assigned more and more memory, less cache hits you get and that's why the performance tanks, it doesn't matter if you have 32GB memory, your CPU cache gets filled and cache hit ratio tanks, then you need to access the RAM for everything, and then it is that you get framelimited by RAM access speed/stuttering.

I tested this thoroughly on a i5 4690k w/ 6MB cache.

At the beginning I get framelimited to 120fps and as the game progresses and starts leaking, cache miss ratio increases and you get FPS stutter.

I get >120fps at the start and 25 fps at 1hr time.

This is the reason of the FPS stutter, its the memory leaks causing cache invalidation (and cache pollution), and then every game action requires fetching from ram.

If you have a CPU with big caches you will suffer this less so.

DDR3 will suffer this the most, with DDR4 being lesser, and DDR5 being less so.

Now please run Valgrind in your C++ codebase.

valgrind --leak-check=full ./your_program

==12345== LEAK SUMMARY:
==12345== definitely lost: 512 bytes in 1 blocks
==12345== indirectly lost: 0 bytes in 0 blocks
==12345== possibly lost: 0 bytes in 0 blocks
==12345== still reachable: 32 bytes in 1 blocks
==12345== suppressed: 0 bytes in 0 blocks
==12345==
==12345== 1 errors in context 1 of 1:
==12345== At 0x4C2BB55: malloc (vg_replace_malloc.c:309)
==12345== by 0x4006A7: main (myprogram.cpp:10)
==12345== by 0x4005D3: _start (in /lib/x86_64-linux-gnu/libc-2.27.so)
==12345==
==12345== LEAK SUMMARY:
==12345== definitely lost: 512 bytes in 1 blocks
==12345== indirectly lost: 0 bytes in 0 blocks
==12345== possibly lost: 0 bytes in 0 blocks
==12345== still reachable: 32 bytes in 1 blocks

That will tell you in what line you have the memory leaks, and then you can fix them.

see: ==12345== by 0x4006A7: main (myprogram.cpp:10)

[krabodyan]

i think i also have this bug, after 25 minutes of game i have about 10 fps and only restart helps

[rzaba0]

Sounds like ValveSoftware/steam-for-linux#11446

[baaannnaaannn]

кажется у меня тоже такой баг, после 25 минут игры у меня около 10 фпс и помогает только перезагрузка

same

[krabodyan]

insert env LD_PRELOAD="" %command% to launch parameters in dota properties in steam

кажется у меня тоже такой баг, после 25 минут игры у меня около 10 фпс и помогает только перезагрузка

same

[baaannnaaannn]

insert env LD_PRELOAD="" %command% to launch parameters in dota properties in steam

кажется у меня тоже такой баг, после 25 минут игры у меня около 10 фпс и помогает только перезагрузка

same

What if I don't have record on?

[krabodyan]

What if I don't have record on?

which record you are talking about

[baaannnaaannn]

What if I don't have record on?

which record you are talking about

Steam record option

[krabodyan]

Steam record option

you dont need any record options. Open steam, then right click dota and select tab with properties. then find launch options

[baaannnaaannn]

Steam record option

you dont need any record options. Open steam, then right click dota and select tab with properties. then find launch options

I mean I need that commands to put in launch options even if I don't have recording in steam