AMD Kaveri: Open-Source Radeon Gallium3D vs. Catalyst 14.12 Omega Driver

[dungeon]

"by default"... "on all". Kinda implies that they just do it all the time and it is therefore entirely unrelated to what the chip is likely to actually be USED for.

Well yeah for all products, any APUs included... dunno what is slowest that is just example of much slower than Kaveri which is tested here.

And there is a HUGE difference between "can", and "likely". The point is that any consideration of hardware has to be based on how it performs on the workloads for which it is LIKELY to be used for.

There is no easy target for PC like it is for Playstation 4, so that reminds me on consoles not on PC kind of gaming, which is really diversed by hardware setups. So either can and likely, on raptr majority games and can and lakely will run fine on Kaveri and other APUs. Also on steam majority of games can and likely will run just fine, simply because majority is old or lightweight enough for APUs. On GoG too. Only most demanding games will not, for sure... while GTX 980 SLI setups can and likely may have have bugs in some simple old games, for which some people might care about, etc. On the other hand no one wants to setup crossfire to play simple games, players of simple casual games are also gamers - that is the point

[Michael]

Thank you.


But it is not fine, if you want to compare to discrete cards.
If I spend my dollars for an A10-7850K APU I will not run it with 1600 MHz RAM.

This is not to compare it to discrete cards, just to show how the drivers are for that particular setup.

[agd5f]

Try booting with radeon.bapm=0 on the kernel command line in grub and see if that helps performance. I've had some reports of bapm causing GPU performance issues on some kaveris.

[AJSB]

Michael didn't used the best RAM possible...he used the best that he had at hand.

There is a significant performance increase going from 1600MHz to 2133 or 2400MHz RAM speed.

OC the iGPU to 950MHz will also boost the performance a lot.

To reduce any increase of temperatures , undervolt, CPU, iGPU and even RAM (i.e. G.Skill 2133MHz RAM that is for 1.6V works perfectly with 1.58V in my tests).

[dungeon]

Try booting with radeon.bapm=0 on the kernel command line in grub and see if that helps performance. I've had some reports of bapm causing GPU performance issues on some kaveris.

What are those, bios issues? MSI wants it on Kabini, but make issue likely there for Michael's A10-7800 where is again MSI board, Asrock seems like does not like that at all, while Asus always work

[nadro]

RANK has no impact on performance.
Maybe you wanted to write single/dual channel?

You're wrong. For Kaveri Dual Rank modules are better. You can find some articles about it on the web

[Ansla]

Well it works for me on AMD Athlon 5350, restart not needed just those Dunno if it list somewhat for dual, that Athlon Kabini is single channel only and i have only one 4GB module now, decode-dimms should just read info from modules:

---=== SPD EEPROM Information ===---
EEPROM CRC of bytes 0-116                       OK (0xE8AC)
# of bytes written to SDRAM EEPROM              176
Total number of bytes in EEPROM                 256
Fundamental Memory type                         DDR3 SDRAM
Module Type                                     UDIMM

---=== Memory Characteristics ===---
Fine time base                                  1.000 ps
Medium time base                                0.125 ns
Maximum module speed                            1600 MHz (PC3-12800)
Size                                            4096 MB
Banks x Rows x Columns x Bits                   8 x 16 x 10 x 64
Ranks                                           1
SDRAM Device Width                              8 bits
Bus Width Extension                             0 bits
tCL-tRCD-tRP-tRAS                               11-11-11-28
Supported CAS Latencies (tCL)                   11T, 10T, 9T, 8T, 7T, 6T

---=== Timing Parameters ===---
Minimum Write Recovery time (tWR)               15.000 ns
Minimum Row Active to Row Active Delay (tRRD)   6.000 ns
Minimum Active to Auto-Refresh Delay (tRC)      48.125 ns
Minimum Recovery Delay (tRFC)                   260.000 ns
Minimum Write to Read CMD Delay (tWTR)          7.500 ns
Minimum Read to Pre-charge CMD Delay (tRTP)     7.500 ns
Minimum Four Activate Window Delay (tFAW)       30.000 ns

---=== Optional Features ===---
Operable voltages                               1.5V
RZQ/6 supported?                                Yes
RZQ/7 supported?                                Yes
DLL-Off Mode supported?                         Yes
Operating temperature range                     0-95 degrees C
Refresh Rate in extended temp range             1X
Auto Self-Refresh?                              No
On-Die Thermal Sensor readout?                  No
Partial Array Self-Refresh?                     No
Thermal Sensor Accuracy                         Not implemented
SDRAM Device Type                               Standard Monolithic

---=== Physical Characteristics ===---
Module Height (mm)                              30
Module Thickness (mm)                           2 front, 2 back
Module Width (mm)                               133.5
Module Reference Card                           A

---=== Manufacturer Data ===---
Module Manufacturer                             Kingston
DRAM Manufacturer                               SK Hynix (former Hyundai Electronics)
Manufacturing Location Code                     0x07
Manufacturing Date                              2014-W07
Assembly Serial Number                          0x731CE516
Part Number                                     KHX1600C9D3/4GX

But there is Ranks 1 there should show something like 2 on dual i guess

Hmm, funny thing, on my A10-7850K it shows the speed as 1333Mhz while BIOS and dmidecode say it's 2133Mhz (RAM is capable of 2400Mhz and works fine with just 2 DIMMS, but it's not stable with 4 DIMMS)

Decoding EEPROM: /sys/bus/i2c/drivers/eeprom/8-0053
Guessing DIMM is in                             bank 4

---=== SPD EEPROM Information ===---
EEPROM CRC of bytes 0-116                       OK (0x69D8)
# of bytes written to SDRAM EEPROM              176
Total number of bytes in EEPROM                 256
Fundamental Memory type                         DDR3 SDRAM
Module Type                                     UDIMM

---=== Memory Characteristics ===---
Fine time base                                  1.000 ps
Medium time base                                0.125 ns
Maximum module speed                            1333 MHz (PC3-10600)
Size                                            8192 MB
Banks x Rows x Columns x Bits                   8 x 16 x 10 x 64
Ranks                                           2
SDRAM Device Width                              8 bits
Bus Width Extension                             0 bits
tCL-tRCD-tRP-tRAS                               9-9-9-24
Supported CAS Latencies (tCL)                   9T, 8T, 7T, 6T

---=== Timing Parameters ===---
Minimum Write Recovery time (tWR)               15.000 ns
Minimum Row Active to Row Active Delay (tRRD)   6.000 ns
Minimum Active to Auto-Refresh Delay (tRC)      49.125 ns
Minimum Recovery Delay (tRFC)                   260.000 ns
Minimum Write to Read CMD Delay (tWTR)          7.500 ns
Minimum Read to Pre-charge CMD Delay (tRTP)     7.500 ns
Minimum Four Activate Window Delay (tFAW)       30.000 ns

---=== Optional Features ===---
Operable voltages                               1.5V
RZQ/6 supported?                                Yes
RZQ/7 supported?                                Yes
DLL-Off Mode supported?                         Yes
Operating temperature range                     0-95 degrees C
Refresh Rate in extended temp range             1X
Auto Self-Refresh?                              No
On-Die Thermal Sensor readout?                  No
Partial Array Self-Refresh?                     Yes
Thermal Sensor Accuracy                         Not implemented
SDRAM Device Type                               Standard Monolithic

---=== Physical Characteristics ===---
Module Height (mm)                              30
Module Thickness (mm)                           2 front, 2 back
Module Width (mm)                               133.5
Module Reference Card                           B

---=== Manufacturer Data ===---
Module Manufacturer                             Kingston
Manufacturing Location Code                     0x07
Manufacturing Date                              2014-W07
Assembly Serial Number                          0x69149193
Part Number                                     KHX2400C11D3/8GX  


Number of SDRAM DIMMs detected and decoded: 4

dmidecode:

Handle 0x0020, DMI type 17, 34 bytes
Memory Device
        Array Handle: 0x0018
        Error Information Handle: Not Provided
        Total Width: 64 bits
        Data Width: 64 bits
        Size: 8192 MB
        Form Factor: DIMM
        Set: None
        Locator: DIMM 1
        Bank Locator: CHANNEL B
        Type: DDR3
        Type Detail: Synchronous Unbuffered (Unregistered)
        Speed: 2132 MHz
        Manufacturer: Kingston       
        Serial Number: 69149193
        Asset Tag: A1_AssetTagNum3
        Part Number: KHX2400C11D3/8GX  
        Rank: 2
        Configured Clock Speed: 2132 MHz

Also, with the new at24 driver it doesn't see any dimm, only the legacy eeprom driver works.

[Michael]

Hmm, funny thing, on my A10-7850K it shows the speed as 1333Mhz while BIOS and dmidecode say it's 2133Mhz (RAM is capable of 2400Mhz and works fine with just 2 DIMMS, but it's not stable with 4 DIMMS)

Also, with the new at24 driver it doesn't see any dimm, only the legacy eeprom driver works.

As explained in my earlier post, I've found the Linux RAM utilities be rather unreliable besides the other shortcomings.

[drSeehas]

This is not to compare it to discrete cards, just to show how the drivers are for that particular setup.

I understood your intention. But I am interested in comparing APUs to discrete cards.

[drSeehas]

You're wrong. For Kaveri Dual Rank modules are better. You can find some articles about it on the web

Why should Dual Rank modules be better for Kaveri?
Prove me wrong with reliable links, please.