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Autodetect tiny mode in AS #27893 #28291

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Merged
merged 1 commit into from
Nov 8, 2025
Merged

Autodetect tiny mode in AS #27893 #28291

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10 changes: 9 additions & 1 deletion ydb/core/driver_lib/run/auto_config_initializer.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -39,6 +39,11 @@ namespace {
constexpr i16 GRpcHandlersPerCompletionQueueInMaxPreparedCpuCase = 1000;
constexpr i16 GRpcHandlersPerCompletionQueuePerCpu = GRpcHandlersPerCompletionQueueInMaxPreparedCpuCase / MaxPreparedCpuCount;

constexpr i16 SchedulerTinyCoresThreshold = 4;

constexpr ::arc_ui64 SchedulerDefaultResolution = 64;
constexpr ::arc_ui64 SchedulerTinyResolution = 1024;

TShortPoolCfg ComputeCpuTable[MaxPreparedCpuCount + 1][5] {
{ {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0} }, // 0
{ {1, 1}, {0, 1}, {0, 1}, {0, 0}, {0, 0} }, // 1
Expand Down Expand Up @@ -239,7 +244,10 @@ namespace NKikimr::NAutoConfigInitializer {

if (!config->HasScheduler()) {
auto *scheduler = config->MutableScheduler();
scheduler->SetResolution(tinyMode ? 1024 : 64);

bool useTiny = tinyMode || (cpuCount >= 1 && cpuCount <= SchedulerTinyCoresThreshold);
scheduler->SetResolution(useTiny ? SchedulerTinyResolution : SchedulerDefaultResolution);

scheduler->SetSpinThreshold(0);
scheduler->SetProgressThreshold(10'000);
}
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