/* * Copyright 2014 Sony Mobile Communications Inc. * * Licensed under the terms of the GNU GPL License version 2 * * Selftest for runtime system size * * Prints the amount of RAM that the currently running system is using. * * This program tries to be as small as possible itself, to * avoid perturbing the system memory utilization with its * own execution. It also attempts to have as few dependencies * on kernel features as possible. * * It should be statically linked, with startup libs avoided. * It uses no library calls, and only the following 3 syscalls: * sysinfo(), write(), and _exit() * * For output, it avoids printf (which in some C libraries * has large external dependencies) by implementing it's own * number output and print routines, and using __builtin_strlen() */ #include #include #define STDOUT_FILENO 1 static int print(const char *s) { return write(STDOUT_FILENO, s, __builtin_strlen(s)); } static inline char *num_to_str(unsigned long num, char *buf, int len) { unsigned int digit; /* put digits in buffer from back to front */ buf += len - 1; *buf = 0; do { digit = num % 10; *(--buf) = digit + '0'; num /= 10; } while (num > 0); return buf; } static int print_num(unsigned long num) { char num_buf[30]; return print(num_to_str(num, num_buf, sizeof(num_buf))); } static int print_k_value(const char *s, unsigned long num, unsigned long units) { unsigned long long temp; int ccode; print(s); temp = num; temp = (temp * units)/1024; num = temp; ccode = print_num(num); print("\n"); return ccode; } /* this program has no main(), as startup libraries are not used */ void _start(void) { int ccode; struct sysinfo info; unsigned long used; print("Testing system size.\n"); print("1..1\n"); ccode = sysinfo(&info); if (ccode < 0) { print("not ok 1 get runtime memory use\n"); print("# could not get sysinfo\n"); _exit(ccode); } /* ignore cache complexities for now */ used = info.totalram - info.freeram - info.bufferram; print_k_value("ok 1 get runtime memory use # size = ", used, info.mem_unit); print("# System runtime memory report (units in Kilobytes):\n"); print_k_value("# Total: ", info.totalram, info.mem_unit); print_k_value("# Free: ", info.freeram, info.mem_unit); print_k_value("# Buffer: ", info.bufferram, info.mem_unit); print_k_value("# In use: ", used, info.mem_unit); _exit(0); }
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authorPeter Zijlstra <peterz@infradead.org>2017-01-26 23:15:08 +0100
committerIngo Molnar <mingo@kernel.org>2017-01-30 11:41:26 +0100
commit0b3589be9b98994ce3d5aeca52445d1f5627c4ba (patch)
tree85d0d9b3ac902af2c938b19a566884caf8d00323 /sound/core/seq
parenta76a82a3e38c8d3fb6499e3dfaeb0949241ab588 (diff)
perf/core: Fix PERF_RECORD_MMAP2 prot/flags for anonymous memory
Andres reported that MMAP2 records for anonymous memory always have their protection field 0. Turns out, someone daft put the prot/flags generation code in the file branch, leaving them unset for anonymous memory. Reported-by: Andres Freund <andres@anarazel.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Don Zickus <dzickus@redhat.com Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@gmail.com> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: acme@kernel.org Cc: anton@ozlabs.org Cc: namhyung@kernel.org Cc: stable@vger.kernel.org # v3.16+ Fixes: f972eb63b100 ("perf: Pass protection and flags bits through mmap2 interface") Link: http://lkml.kernel.org/r/20170126221508.GF6536@twins.programming.kicks-ass.net Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'sound/core/seq')