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Add io priority to reduce impact of ActivateChain on IBD and impact o…
…f historical block serving. Based on bitcoin#9245
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,57 @@ | ||
| // Copyright (c) 2016 The Bitcoin Core developers | ||
| // Distributed under the MIT software license, see the accompanying | ||
| // file COPYING or http://www.opensource.org/licenses/mit-license.php. | ||
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| #if defined(HAVE_CONFIG_H) | ||
| #include "config/bitcoin-config.h" | ||
| #endif | ||
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| #include "utilioprio.h" | ||
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| #ifdef HAVE_IOPRIO_SYSCALL | ||
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| #ifndef _GNU_SOURCE | ||
| #define _GNU_SOURCE | ||
| #endif | ||
| #include <unistd.h> | ||
| #include <sys/syscall.h> | ||
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| #ifndef IOPRIO_WHO_PROCESS | ||
| #define IOPRIO_WHO_PROCESS 1 | ||
| #endif | ||
| #ifndef IOPRIO_CLASS_IDLE | ||
| #define IOPRIO_CLASS_IDLE 3 | ||
| #endif | ||
| #ifndef IOPRIO_CLASS_SHIFT | ||
| #define IOPRIO_CLASS_SHIFT 13 | ||
| #endif | ||
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| int ioprio_get() { | ||
| return syscall(SYS_ioprio_get, IOPRIO_WHO_PROCESS, 0); | ||
| } | ||
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| int ioprio_set(const int ioprio) { | ||
| return syscall(SYS_ioprio_set, IOPRIO_WHO_PROCESS, 0, ioprio); | ||
| } | ||
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| int ioprio_set_idle() { | ||
| return ioprio_set(7 | (IOPRIO_CLASS_IDLE << IOPRIO_CLASS_SHIFT)); | ||
| } | ||
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| #elif HAVE_IOPOLICY | ||
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| #include <sys/resource.h> | ||
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| int ioprio_get() { | ||
| return getiopolicy_np(IOPOL_TYPE_DISK, IOPOL_SCOPE_THREAD); | ||
| } | ||
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| int ioprio_set(const int ioprio) { | ||
| return setiopolicy_np(IOPOL_TYPE_DISK, IOPOL_SCOPE_THREAD, ioprio); | ||
| } | ||
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| int ioprio_set_idle() { | ||
| return ioprio_set(IOPOL_UTILITY); | ||
| } | ||
|
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| #endif |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,57 @@ | ||
| // Copyright (c) 2016 Satoshi Nakamoto | ||
| // Distributed under the MIT software license, see the accompanying | ||
| // file COPYING or http://www.opensource.org/licenses/mit-license.php. | ||
|
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| #ifndef BITCOIN_UTIL_IOPRIO_H | ||
| #define BITCOIN_UTIL_IOPRIO_H | ||
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| #if defined(HAVE_CONFIG_H) | ||
| #include "config/bitcoin-config.h" | ||
| #endif | ||
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| #include "util.h" | ||
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| #if defined(HAVE_IOPRIO_SYSCALL) || defined(HAVE_IOPOLICY) | ||
| int ioprio_get(); | ||
| int ioprio_set(int ioprio); | ||
| int ioprio_set_idle(); | ||
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| class ioprio_idler { | ||
| private: | ||
| int orig; | ||
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| public: | ||
| ioprio_idler(const bool actually_idle) { | ||
| if (!actually_idle) { | ||
| orig = -1; | ||
| return; | ||
| } | ||
|
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| orig = ioprio_get(); | ||
| if (orig == -1) { | ||
| return; | ||
| } | ||
| if (ioprio_set_idle() == -1) { | ||
| orig = -1; | ||
| } | ||
| } | ||
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| ~ioprio_idler() { | ||
| if (orig == -1) { | ||
| return; | ||
| } | ||
| if (ioprio_set(orig) == -1) { | ||
| LogPrintf("failed to restore ioprio\n"); | ||
| } | ||
| } | ||
| }; | ||
| #define IOPRIO_IDLER(actually_idle) ioprio_idler ioprio_idler_(actually_idle) | ||
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| #else | ||
| #define ioprio_get() ((void)-1) | ||
| #define ioprio_set(ioprio) ((void)-1) | ||
| #define ioprio_set_idle() ((void)-1) | ||
| #define IOPRIO_IDLER(actually_idle) (void)actually_idle; | ||
| #endif | ||
|
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| #endif // BITCOIN_UTIL_IOPRIO_H |
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