<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - Unstable performance (periodic and repeating patterns of fps change) and changing VDDGFX" href="https://bugs.freedesktop.org/show_bug.cgi?id=111987#c8">Comment # 8</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - Unstable performance (periodic and repeating patterns of fps change) and changing VDDGFX" href="https://bugs.freedesktop.org/show_bug.cgi?id=111987">bug 111987</a> from <a class="email" href="mailto:witold.baryluk+freedesktop@gmail.com" title="Witold Baryluk <witold.baryluk+freedesktop@gmail.com>"> Witold Baryluk</a> <pre>My random guess is that it is due to some bug in calculating gpu_busy_percent possibly, or SCLK_{UP,DOWN}_HYST parameters: Here is a dump of various values, when running Talos: Sun Oct 13 09:29:46 UTC 2019 /sys/class/drm/renderD128/device files: gpu_busy_percent:5 pp_num_states:states: 2 pp_num_states:0 boot pp_num_states:1 performance pp_cur_state:1 pp_power_profile_mode:NUM MODE_NAME SCLK_UP_HYST SCLK_DOWN_HYST SCLK_ACTIVE_LEVEL MCLK_UP_HYST MCLK_DOWN_HYST MCLK_ACTIVE_LEVEL pp_power_profile_mode: 0 BOOTUP_DEFAULT: - - - - - - pp_power_profile_mode: 1 3D_FULL_SCREEN: 0 100 30 0 100 10 pp_power_profile_mode: 2 POWER_SAVING: 10 0 30 - - - pp_power_profile_mode: 3 VIDEO: - - - 10 16 31 pp_power_profile_mode: 4 VR: 0 11 50 0 100 10 pp_power_profile_mode: 5 COMPUTE *: 0 5 30 0 100 10 pp_power_profile_mode: 6 CUSTOM: - - - - - - vbios_version:113-C8800100-102 revision:0xc8 mem_info_gtt_total:4294967296 mem_info_gtt_used:364883968 mem_info_vis_vram_total:268435456 mem_info_vis_vram_used:50188288 mem_info_vram_total:4294967296 mem_info_vram_used:2290094080 power_dpm_force_performance_level:manual power_dpm_state:performance hwmon/hwmon0/freq1_label:sclk hwmon/hwmon0/freq1_input:944000000 hwmon/hwmon0/freq2_label:mclk hwmon/hwmon0/freq2_input:500000000 hwmon/hwmon0/temp1_input:31000 hwmon/hwmon0/power1_average:85182000 hwmon/hwmon0/fan1_input:3069 hwmon/hwmon0/pwm1:239 hwmon/hwmon0/in0_label:vddgfx hwmon/hwmon0/in0_input:1100 pp_dpm_mclk:0: 500Mhz * pp_dpm_sclk:0: 300Mhz pp_dpm_sclk:1: 512Mhz pp_dpm_sclk:2: 724Mhz pp_dpm_sclk:3: 892Mhz pp_dpm_sclk:4: 944Mhz * pp_dpm_sclk:5: 984Mhz pp_dpm_sclk:6: 1018Mhz pp_dpm_sclk:7: 1050Mhz pp_mclk_od:0 pp_sclk_od:0 d3cold_allowed:1 power_dpm_force_performance_level:manual /sys/class/drm/ttm/buffer_objects/bo_count:2997 /sys/kernel/debug/dri/0/clients: command pid dev master a uid magic /sys/kernel/debug/dri/0/clients: Xorg 118921 0 y y 0 0 /sys/kernel/debug/dri/0/clients: Xorg 118921 128 n y 0 0 /sys/kernel/debug/dri/0/clients: Xorg 118921 128 n y 0 0 /sys/kernel/debug/dri/0/clients: Xorg 118921 128 n y 0 0 /sys/kernel/debug/dri/0/clients: Xorg 118921 128 n y 0 0 /sys/kernel/debug/dri/0/clients: Xorg 118921 128 n y 0 0 /sys/kernel/debug/dri/0/clients: Xorg 118921 128 n y 0 0 /sys/kernel/debug/dri/0/clients: Xorg 118921 128 n y 0 0 /sys/kernel/debug/dri/0/clients: Xorg 118921 128 n y 0 0 /sys/kernel/debug/dri/0/clients: Xorg 118921 128 n y 0 0 /sys/kernel/debug/dri/0/clients: Xorg 118921 128 n y 0 0 /sys/kernel/debug/dri/0/clients: Talos 37263 128 n n 1000 0 The default pp_power_profile_mode was 1 (3D_FULL_SCREEN). I switched it just now to 5 (COMPUTE), but results are the same. The gpu_busy_percent switches every second between something close to 0 and something close to 100. Despite the game constantly submitting the work and rendering at ~200 FPS. The pp_dpm_sclk starts high and slowly goes down step by step, and eventually goes back to 7 (1050MHz), and process repeats. I tried doing: echo "7" > /sys/class/drm/card0/device/pp_dpm_sclk echo "manual" > /sys/class/drm/card0/device/power_dpm_force_performance_level and I see no differences, still same effect.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>