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This (defaults to 8) sets a limit on the number of poller threads that will be used for servicing I/Os. This is the size of the I/O completion port thread pool on Windows. POSIX pollers are generally not concurrent at present.
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@@ -1,5 +1,5 @@ | ||
// | ||
// Copyright 2020 Staysail Systems, Inc. <[email protected]> | ||
// Copyright 2023 Staysail Systems, Inc. <[email protected]> | ||
// Copyright 2018 Capitar IT Group BV <[email protected]> | ||
// | ||
// This software is supplied under the terms of the MIT License, a | ||
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@@ -92,12 +92,17 @@ nni_win_io_sysinit(void) | |
int nthr = nni_plat_ncpu() * 2; | ||
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// Limits on the thread count. This is fairly arbitrary. | ||
if (nthr < 4) { | ||
nthr = 4; | ||
if (nthr < 2) { | ||
nthr = 2; | ||
} | ||
if (nthr > 64) { | ||
nthr = 64; | ||
#ifndef NNG_MAX_POLLER_THREADS | ||
#define NNG_MAX_POLLER_THREADS 8 | ||
#endif | ||
#if NNG_MAX_POLLER_THREADS > 0 | ||
if (nthr > NNG_MAX_POLLER_THREADS) { | ||
nthr = NNG_MAX_POLLER_THREADS; | ||
} | ||
#endif | ||
if ((win_io_thrs = NNI_ALLOC_STRUCTS(win_io_thrs, nthr)) == NULL) { | ||
return (NNG_ENOMEM); | ||
} | ||
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