Re: [PATCH v2 4/4] drm/mgag200: Use DMA to copy the framebuffer to the VRAM

On 16/06/2023 10:08, Thomas Zimmermann wrote: Hi Am 15.06.23 um 19:15 schrieb Jocelyn Falempe: On 15/06/2023 16:24, Thomas Zimmermann wrote: Hi Jocelyn Am 31.05.23 um 11:21 schrieb Jocelyn Falempe: Even if the transfer is not faster, it brings significant improvement in latencies and CPU usa

Re: [PATCH v2 4/4] drm/mgag200: Use DMA to copy the framebuffer to the VRAM

Hi Am 15.06.23 um 19:15 schrieb Jocelyn Falempe: On 15/06/2023 16:24, Thomas Zimmermann wrote: Hi Jocelyn Am 31.05.23 um 11:21 schrieb Jocelyn Falempe: Even if the transfer is not faster, it brings significant improvement in latencies and CPU usage. CPU usage drops from 100% of one core to 3

Re: [PATCH v2 4/4] drm/mgag200: Use DMA to copy the framebuffer to the VRAM

On 15/06/2023 16:24, Thomas Zimmermann wrote: Hi Jocelyn Am 31.05.23 um 11:21 schrieb Jocelyn Falempe: Even if the transfer is not faster, it brings significant improvement in latencies and CPU usage. CPU usage drops from 100% of one core to 3% when continuously refreshing the screen. I trie

Re: [PATCH v2 4/4] drm/mgag200: Use DMA to copy the framebuffer to the VRAM

Hi Jocelyn Am 31.05.23 um 11:21 schrieb Jocelyn Falempe: Even if the transfer is not faster, it brings significant improvement in latencies and CPU usage. CPU usage drops from 100% of one core to 3% when continuously refreshing the screen. I tried your patchset on a HP Proliant server with a

[PATCH v2 4/4] drm/mgag200: Use DMA to copy the framebuffer to the VRAM

Even if the transfer is not faster, it brings significant improvement in latencies and CPU usage. CPU usage drops from 100% of one core to 3% when continuously refreshing the screen. The primary DMA is used to send commands (register write), and the secondary DMA to send the pixel data. It uses t