| syscall | new | old | new / old |
|---|---|---|---|
| access | 8 | 8 | 100,00% |
| arch_prctl | 1 | 1 | 100,00% |
| brk | 17 | 16 | 106,25% |
| clock_getres | 1 | 1 | 100,00% |
| clone | 10 | 10 | 100,00% |
| close | 1119 | 1490 | 75,10% |
| epoll_create1 | 3 | 3 | 100,00% |
| epoll_ctl | 7 | 7 | 100,00% |
| epoll_wait | 8825 | 50319 | 17,54% |
| eventfd2 | 3 | 3 | 100,00% |
| exit | 9 | 9 | 100,00% |
| exit_group | 1 | 1 | 100,00% |
| fcntl | 11 | 11 | 100,00% |
| futex | 13903 | 76681 | 18,13% |
| getcwd | 1 | 1 | 100,00% |
| getdents | 3291 | 2922 | 112,63% |
| getegid | 11 | 11 | 100,00% |
| geteuid | 11 | 11 | 100,00% |
| getgid | 11 | 11 | 100,00% |
| getrandom | 1 | 1 | 100,00% |
| getrlimit | 11 | 11 | 100,00% |
| getuid | 11 | 11 | 100,00% |
| ioctl | 37 | 37 | 100,00% |
| madvise | 51 | 163 | 31,29% |
| mmap | 77 | 247 | 31,17% |
| mprotect | 286 | 599 | 47,75% |
| munmap | 87 | 427 | 20,37% |
| newfstat | 1116 | 1480 | 75,41% |
| open | 1110 | 1482 | 74,90% |
| pipe2 | 4 | 4 | 100,00% |
| pread64 | 1 | 3 | 33,33% |
| read | 4444 | 25232 | 17,61% |
| readlink | 1 | 1 | 100,00% |
| rt_sigaction | 63 | 63 | 100,00% |
| rt_sigprocmask | 13 | 13 | 100,00% |
| sched_yield | 9 | 7 | 128,57% |
| set_robust_list | 11 | 11 | 100,00% |
| set_tid_address | 1 | 1 | 100,00% |
| statx | 5 | 23756 | 0,02% |
| sysinfo | 0 | 1 | 0,00% |
| write | 22101 | 26697 | 82,78% |
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June 23, 2021 12:52
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klaw & native walking syscall count
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| /* | |
| $ sudo syscount -c nodejs iterate-klaw.js /sys/fs/cgroup/ | |
| Tracing while running: "nodejs iterate-klaw.js /sys/fs/cgroup/"... | |
| SYSCALL COUNT | |
| arch_prctl 1 | |
| clock_getres 1 | |
| exit_group 1 | |
| getcwd 1 | |
| getrandom 1 | |
| readlink 1 | |
| set_tid_address 1 | |
| sysinfo 1 | |
| epoll_create1 3 | |
| eventfd2 3 | |
| pread64 3 | |
| pipe2 4 | |
| epoll_ctl 7 | |
| sched_yield 7 | |
| access 8 | |
| exit 9 | |
| clone 10 | |
| fcntl 11 | |
| getegid 11 | |
| geteuid 11 | |
| getgid 11 | |
| getrlimit 11 | |
| getuid 11 | |
| set_robust_list 11 | |
| rt_sigprocmask 13 | |
| brk 16 | |
| ioctl 37 | |
| rt_sigaction 63 | |
| madvise 163 | |
| mmap 247 | |
| munmap 427 | |
| mprotect 599 | |
| newfstat 1480 | |
| open 1482 | |
| close 1490 | |
| getdents 2922 | |
| statx 23756 | |
| read 25232 | |
| write 26697 | |
| epoll_wait 50319 | |
| futex 76681 | |
| */ | |
| const klaw = require('klaw'); | |
| const iterate = async function* (directory) { | |
| for await (const { path, stats } of klaw(directory)) { | |
| if (!stats.isDirectory()) { | |
| continue; | |
| } | |
| yield {name: path} | |
| } | |
| }; | |
| const main = async () => { | |
| for await (const {name} of iterate(process.argv[2])){ | |
| console.log(name); | |
| }; | |
| }; | |
| main().catch(err => { | |
| console.error(err); | |
| process.exit(-1) | |
| }); |
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| /* | |
| $ sudo syscount -c nodejs iterate-native.js /sys/fs/cgroup/ | |
| Tracing while running: "nodejs iterate-native.js /sys/fs/cgroup/"... | |
| SYSCALL COUNT | |
| arch_prctl 1 | |
| clock_getres 1 | |
| exit_group 1 | |
| getcwd 1 | |
| getrandom 1 | |
| pread64 1 | |
| readlink 1 | |
| set_tid_address 1 | |
| epoll_create1 3 | |
| eventfd2 3 | |
| pipe2 4 | |
| statx 5 # 0.02% of previous value | |
| epoll_ctl 7 | |
| access 8 | |
| exit 9 | |
| sched_yield 9 | |
| clone 10 | |
| fcntl 11 | |
| getegid 11 | |
| geteuid 11 | |
| getgid 11 | |
| getrlimit 11 | |
| getuid 11 | |
| set_robust_list 11 | |
| rt_sigprocmask 13 | |
| brk 17 | |
| ioctl 37 | |
| madvise 51 | |
| rt_sigaction 63 | |
| mmap 77 | |
| munmap 87 | |
| mprotect 286 | |
| open 1110 | |
| newfstat 1116 | |
| close 1119 | |
| getdents 3291 | |
| read 4444 # 5x time less | |
| epoll_wait 8825 # 5x time less | |
| futex 13903 | |
| write 22101 | |
| */ | |
| const fs = require('fs'); | |
| const path = require('path'); | |
| const iterate = async function* (directory) { | |
| for await (const dirent of await fs.promises.opendir(directory)) { | |
| const name = path.join(directory, dirent.name); | |
| yield { | |
| dirent, | |
| name | |
| }; | |
| if(dirent.isDirectory()){ | |
| for await(const entry of iterate(name)){ | |
| yield entry | |
| } | |
| } | |
| } | |
| }; | |
| const main = async () => { | |
| for await (const {name} of iterate(process.argv[2])){ | |
| console.log(name); | |
| }; | |
| }; | |
| main().catch(err => { | |
| console.error(err); | |
| process.exit(-1) | |
| }); |
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| { | |
| "name": "benchmark", | |
| "lockfileVersion": 2, | |
| "requires": true, | |
| "packages": { | |
| "": { | |
| "dependencies": { | |
| "klaw": "^3.0.0" | |
| } | |
| }, | |
| "node_modules/graceful-fs": { | |
| "version": "4.2.6", | |
| "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.2.6.tgz", | |
| "integrity": "sha512-nTnJ528pbqxYanhpDYsi4Rd8MAeaBA67+RZ10CM1m3bTAVFEDcd5AuA4a6W5YkGZ1iNXHzZz8T6TBKLeBuNriQ==" | |
| }, | |
| "node_modules/klaw": { | |
| "version": "3.0.0", | |
| "resolved": "https://registry.npmjs.org/klaw/-/klaw-3.0.0.tgz", | |
| "integrity": "sha512-0Fo5oir+O9jnXu5EefYbVK+mHMBeEVEy2cmctR1O1NECcCkPRreJKrS6Qt/j3KC2C148Dfo9i3pCmCMsdqGr0g==", | |
| "dependencies": { | |
| "graceful-fs": "^4.1.9" | |
| } | |
| } | |
| }, | |
| "dependencies": { | |
| "graceful-fs": { | |
| "version": "4.2.6", | |
| "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.2.6.tgz", | |
| "integrity": "sha512-nTnJ528pbqxYanhpDYsi4Rd8MAeaBA67+RZ10CM1m3bTAVFEDcd5AuA4a6W5YkGZ1iNXHzZz8T6TBKLeBuNriQ==" | |
| }, | |
| "klaw": { | |
| "version": "3.0.0", | |
| "resolved": "https://registry.npmjs.org/klaw/-/klaw-3.0.0.tgz", | |
| "integrity": "sha512-0Fo5oir+O9jnXu5EefYbVK+mHMBeEVEy2cmctR1O1NECcCkPRreJKrS6Qt/j3KC2C148Dfo9i3pCmCMsdqGr0g==", | |
| "requires": { | |
| "graceful-fs": "^4.1.9" | |
| } | |
| } | |
| } | |
| } |
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| { | |
| "dependencies": { | |
| "klaw": "^3.0.0" | |
| } | |
| } |
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