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Bound Direct relay buffers with an adaptive global memory envelope

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Co-Authored-By: brekotis <93345790+brekotis@users.noreply.github.com>
This commit is contained in:
Alexey
2026-07-11 20:56:54 +03:00
parent d4c4980e5a
commit 96425f15c8
18 changed files with 1586 additions and 48 deletions
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src/config/types.rs
+9 -2
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@@ -626,7 +626,7 @@ pub struct GeneralConfig {
#[serde(default = "default_me_d2c_frame_buf_shrink_threshold_bytes")]
pub me_d2c_frame_buf_shrink_threshold_bytes: usize,
/// Copy buffer size for client->DC direction in direct relay.
/// Copy buffer ceiling for client->DC direction in direct relay.
///
/// This is also the upper bound for one amortized upload rate-limit burst:
/// upload debt is settled before the next relay read instead of blocking
@@ -634,13 +634,18 @@ pub struct GeneralConfig {
#[serde(default = "default_direct_relay_copy_buf_c2s_bytes")]
pub direct_relay_copy_buf_c2s_bytes: usize,
/// Copy buffer size for DC->client direction in direct relay.
/// Copy buffer ceiling for DC->client direction in direct relay.
///
/// This bounds one direct download rate-limit grant because writes are
/// clipped to the currently available shaper budget.
#[serde(default = "default_direct_relay_copy_buf_s2c_bytes")]
pub direct_relay_copy_buf_s2c_bytes: usize,
/// Process-wide hard ceiling for Direct relay copy buffers.
/// `0` derives the ceiling from host and cgroup memory limits.
#[serde(default = "default_direct_relay_buffer_budget_max_bytes")]
pub direct_relay_buffer_budget_max_bytes: usize,
/// Max pending ciphertext buffer per client writer (bytes).
/// Controls FakeTLS backpressure vs throughput.
#[serde(default = "default_crypto_pending_buffer")]
@@ -1121,6 +1126,8 @@ impl Default for GeneralConfig {
default_me_d2c_frame_buf_shrink_threshold_bytes(),
direct_relay_copy_buf_c2s_bytes: default_direct_relay_copy_buf_c2s_bytes(),
direct_relay_copy_buf_s2c_bytes: default_direct_relay_copy_buf_s2c_bytes(),
direct_relay_buffer_budget_max_bytes:
default_direct_relay_buffer_budget_max_bytes(),
me_warmup_stagger_enabled: default_true(),
me_warmup_step_delay_ms: default_warmup_step_delay_ms(),
me_warmup_step_jitter_ms: default_warmup_step_jitter_ms(),