Takashi Nakamura tanakamura
tanakamura
/ pipe.c
Created
November 18, 2019 08:22
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| #include <unistd.h> | |
| #include <fcntl.h> | |
| #include <pthread.h> | |
| #include <stdio.h> | |
| static double getsec() | |
| { | |
| struct timespec ts; | |
| clock_gettime(CLOCK_MONOTONIC, &ts); |
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| -> : divider_bit | |
| | |27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|29|30|31|32 | |
| ==================================================================================================== | |
| | 0 |25|25|25|25|25|25|25|25|25|25|25|25|25|25|25|25|25|25|25|25|25|25|25|25|25|25|25|25|25|25|25|25 | |
| ---------------------------------------------------------------------------------------------------- | |
| | 1 |27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27 | |
| ---------------------------------------------------------------------------------------------------- | |
| | 2 |27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27 | |
| ---------------------------------------------------------------------------------------------------- | |
| | 3 |27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27|27 |
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| ==== syscall ==== | |
| | | MCall/sec | |
| ================================ | |
| | close_minus1 | 3.78879 | |
| -------------------------------- | |
| | open_close | 0.77823 | |
| -------------------------------- | |
| | pipe_close | 0.43007 | |
| -------------------------------- | |
| | select_0 | 1.45407 |
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| ==== syscall ==== | |
| | | MCall/sec | |
| ================================ | |
| | close_minus1 | 9.58463 | |
| -------------------------------- | |
| | open_close | 1.10591 | |
| -------------------------------- | |
| | pipe_close | 0.57343 | |
| -------------------------------- | |
| | select_0 | 2.15039 |
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| ostimer: clock_gettime | |
| userland_timer: rdtscp | |
| use_cpucyle: no | |
| ==== membw_1t ==== | |
| | |MiB/sec | |
| ================================= | |
| | simple-long-copy | 8626.01679 | |
| --------------------------------- | |
| | libc-memcpy |16827.83568 | |
| --------------------------------- |
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| ostimer: clock_gettime | |
| userland_timer: rdtscp | |
| use_cpucyle: no | |
| ==== membw_1t ==== | |
| | |MiB/sec | |
| ================================= | |
| | simple-long-copy |23061.14028 | |
| --------------------------------- | |
| | libc-memcpy |30647.25286 | |
| --------------------------------- |
tanakamura
/ znver2-amdmemcpy.txt
Created
December 12, 2020 14:12
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| ostimer: clock_gettime | |
| userland_timer: rdtscp | |
| use_cpucyle: no | |
| ==== membw_1t ==== | |
| | |MiB/sec | |
| ================================= | |
| | simple-long-copy |16795.94556 | |
| --------------------------------- | |
| | libc-memcpy |32935.04326 | |
| --------------------------------- |
tanakamura
/ cfl.txt
Last active
December 13, 2020 17:21
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| ostimer: clock_gettime | |
| userland_timer: rdtscp | |
| perf_counter: yes | |
| Intel(R) Core(TM) i5-8250U CPU @ 1.60GHz | |
| ==== membw_1t ==== | |
| | |MiB/sec | |
| ================================= | |
| | simple-long-copy |14401.82962 | |
| --------------------------------- | |
| | libc-memcpy |18055.36681 |
tanakamura
/ cfl.txt
Created
December 19, 2020 07:55
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| ostimer: clock_gettime | |
| userland_timer: rdtscp | |
| perf_counter: yes | |
| Intel(R) Core(TM) i5-8250U CPU @ 1.60GHz | |
| ==== actual-freq ==== | |
| -> : num_thread | |
| | | 1| 2| 4| 7 | |
| ================================================ | |
| | iadd64 (0.01 [sec]) |3.38|3.38|3.38|2.78 | |
| ------------------------------------------------ |
tanakamura
/ cfl.txt
Created
December 19, 2020 08:33
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| ostimer: clock_gettime | |
| userland_timer: rdtscp | |
| perf_counter: yes | |
| Intel(R) Core(TM) i5-8250U CPU @ 1.60GHz | |
| ==== actual-freq ==== | |
| -> : num_thread | |
| | | 1| 2| 4| 7 | |
| ================================================= | |
| | iadd64 (0.01 [sec]) |3.39|3.39|3.39|3.39 | |
| | fadd64 (0.01 [sec]) |3.39|3.39|3.39|3.39 |