libfoedus-core
FOEDUS Core Library
device_emulation_options.hpp
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18 #ifndef FOEDUS_FS_DEVICE_EMULATION_OPTIONS_HPP_
19 #define FOEDUS_FS_DEVICE_EMULATION_OPTIONS_HPP_
20 #include <stdint.h>
21 
22 #include "foedus/compiler.hpp"
23 #include "foedus/cxx11.hpp"
24 #include "foedus/externalize/externalizable.hpp"
25 
26 namespace foedus {
27 namespace fs {
36 struct DeviceEmulationOptions CXX11_FINAL : public virtual externalize::Externalizable {
37  DeviceEmulationOptions() {
38  disable_direct_io_ = false;
39  null_device_ = false;
40  emulated_seek_latency_cycles_ = 0;
41  emulated_read_kb_cycles_ = 0;
42  emulated_write_kb_cycles_ = 0;
43  }
44 
46  bool disable_direct_io_;
47 
49  bool null_device_;
50 
52  uint32_t emulated_seek_latency_cycles_;
53 
58  uint32_t emulated_read_kb_cycles_;
59 
63  uint32_t emulated_write_kb_cycles_;
64 
65  EXTERNALIZABLE(DeviceEmulationOptions);
66 };
67 } // namespace fs
68 } // namespace foedus
69 #endif // FOEDUS_FS_DEVICE_EMULATION_OPTIONS_HPP_
foedus::externalize::Externalizable
Represents an object that can be written to and read from files/bytes in XML format.
Definition: externalizable.hpp:53
foedus::fs::DeviceEmulationOptions::emulated_seek_latency_cycles_
uint32_t emulated_seek_latency_cycles_
[Experiments] additional CPU cycles to busy-wait for each seek.
Definition: device_emulation_options.hpp:52
foedus
Root package of FOEDUS (Fast Optimistic Engine for Data Unification Services).
Definition: assert_nd.hpp:44
EXTERNALIZABLE
#define EXTERNALIZABLE(clazz)
Macro to declare/define essential methods for an externalizable class.
Definition: externalizable.hpp:294
CXX11_FINAL
#define CXX11_FINAL
Used in public headers in place of "final" of C++11.
Definition: cxx11.hpp:131
foedus::fs::DeviceEmulationOptions::emulated_write_kb_cycles_
uint32_t emulated_write_kb_cycles_
[Experiments] additional CPU cycles to busy-wait for each 1KB write.
Definition: device_emulation_options.hpp:63
foedus::fs::DeviceEmulationOptions
Set of configurations to emulate slower devices for some experiments.
Definition: device_emulation_options.hpp:36
foedus::fs::DeviceEmulationOptions::null_device_
bool null_device_
[Experiments] as if we write out to /dev/null.
Definition: device_emulation_options.hpp:49
foedus::fs::DeviceEmulationOptions::emulated_read_kb_cycles_
uint32_t emulated_read_kb_cycles_
[Experiments] additional CPU cycles to busy-wait for each 1KB read.
Definition: device_emulation_options.hpp:58
foedus::fs::DeviceEmulationOptions::disable_direct_io_
bool disable_direct_io_
[Experiments] Whether to disable Direct I/O and use non-direct I/O instead.
Definition: device_emulation_options.hpp:46