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docs(server): clarify that --ctx-size is total context divided among parallel slots #17767

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docs(server): clarify that --ctx-size is total context divided among parallel slots #17767

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7 changes: 5 additions & 2 deletions common/arg.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -920,7 +920,9 @@ common_params_context common_params_parser_init(common_params & params, llama_ex
).set_examples({LLAMA_EXAMPLE_LOOKUP}));
add_opt(common_arg(
{"-c", "--ctx-size"}, "N",
string_format("size of the prompt context (default: %d, 0 = loaded from model)", params.n_ctx),
string_format("size of the prompt context (default: %d, 0 = loaded from model). "
"Note: when using --parallel N, this is the TOTAL context divided among all slots, "
"not per-slot. For X tokens per slot with N parallel slots, use --ctx-size X*N", params.n_ctx),
[](common_params & params, int value) {
params.n_ctx = value;
}
Expand Down Expand Up @@ -1756,7 +1758,8 @@ common_params_context common_params_parser_init(common_params & params, llama_ex
).set_env("LLAMA_ARG_DEFRAG_THOLD"));
add_opt(common_arg(
{"-np", "--parallel"}, "N",
string_format("number of parallel sequences to decode (default: %d)", params.n_parallel),
string_format("number of parallel sequences to decode (default: %d). "
"Note: total context (--ctx-size) is divided equally among parallel slots", params.n_parallel),
[](common_params & params, int value) {
params.n_parallel = value;
}
Expand Down
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