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venus: add VN_RELAX_BASE_SLEEP_US env var for tuning cpu utils 

Cap the minimum to the current base sleep us 10.

Signed-off-by: Yiwei Zhang <zzyiwei@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16256>
This commit is contained in:
Yiwei Zhang 2022-04-29 21:08:55 +00:00 committed by Marge Bot
parent f3fb1d6632
commit 84a53de76c
2 changed files with 8 additions and 1 deletions
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8
src/virtio/vulkan/vn_common.c
View File

@ -19,6 +19,8 @@
#include "venus-protocol/vn_protocol_driver_info.h"
#include "vk_enum_to_str.h"
#define VN_RELAX_MIN_BASE_SLEEP_US (10)
static const struct debug_control vn_debug_options[] = {
{ "init", VN_DEBUG_INIT },
{ "result", VN_DEBUG_RESULT },
@ -48,6 +50,10 @@ vn_env_init_once(void)
debug_get_num_option("VN_DRAW_CMD_BATCH_LIMIT", UINT32_MAX);
if (!vn_env.draw_cmd_batch_limit)
vn_env.draw_cmd_batch_limit = UINT32_MAX;
vn_env.relax_base_sleep_us = debug_get_num_option(
"VN_RELAX_BASE_SLEEP_US", VN_RELAX_MIN_BASE_SLEEP_US);
vn_env.relax_base_sleep_us =
MAX2(vn_env.relax_base_sleep_us, VN_RELAX_MIN_BASE_SLEEP_US);
}
void
@ -101,7 +107,7 @@ vn_relax(uint32_t *iter, const char *reason)
* keep doubling both sleep length and count.
*/
const uint32_t busy_wait_order = 4;
const uint32_t base_sleep_us = 10;
const uint32_t base_sleep_us = vn_env.relax_base_sleep_us;
const uint32_t warn_order = 12;
const uint32_t abort_order = 14;

1
src/virtio/vulkan/vn_common.h
View File

@ -183,6 +183,7 @@ struct vn_env {
uint64_t perf;
/* zero will be overridden to UINT32_MAX as no limit */
uint32_t draw_cmd_batch_limit;
uint32_t relax_base_sleep_us;
};
extern struct vn_env vn_env;