diff options
Diffstat (limited to 'toys/vmstat.c')
| -rw-r--r-- | toys/vmstat.c | 191 |
1 files changed, 0 insertions, 191 deletions
diff --git a/toys/vmstat.c b/toys/vmstat.c deleted file mode 100644 index 2826ced5..00000000 --- a/toys/vmstat.c +++ /dev/null @@ -1,191 +0,0 @@ -/* vi: set sw=4 ts=4: - * - * vmstat.c - Report virtual memory statistics. - * - * Copyright 2012 Elie De Brauwer <eliedebrauwer@gmail.com> - * - * Not in SUSv4. - -USE_VMSTAT(NEWTOY(vmstat, ">2n", TOYFLAG_BIN)) - -config VMSTAT - bool "vmstat" - default y - help - usage: vmstat [-n] [delay [count]] - -n Display the header only once - delay The delay between updates in seconds, when not specified - the average since boot is displayed. - count Number of updates to display, the default is inifinite. -*/ - -#include "toys.h" - -void read_proc_stat(unsigned int * proc_running, unsigned int * proc_blocked, - uint64_t * sys_irq, uint64_t * sys_ctxt, - uint64_t * cpu_user, uint64_t * cpu_sys, uint64_t * cpu_idle, uint64_t * cpu_wait) -{ - char * off; - uint64_t c_user, c_nice, c_sys, c_irq, c_sirq; - int fd = xopen("/proc/stat", O_RDONLY); - size_t s = xread(fd, toybuf, sizeof(toybuf)-1); - toybuf[s] = 0; - if ( s == sizeof(toybuf)-1) - error_exit("/proc/stat is too large"); - - off = strstr(toybuf, "cpu "); - // Ignoring steal and guest fields for now. - if (off) sscanf(off, "cpu %"PRIu64" %"PRIu64" %"PRIu64" %"PRIu64 \ - " %"PRIu64" %"PRIu64" %"PRIu64, &c_user, &c_nice, &c_sys, cpu_idle, - cpu_wait, &c_irq, &c_sirq); - *cpu_user = c_user + c_nice; - *cpu_sys = c_sys + c_irq + c_sirq; - off = strstr(toybuf, "intr"); - if (off) sscanf(off, "intr %"PRIu64, sys_irq); - - off = strstr(toybuf, "ctxt"); - if (off) sscanf(off, "ctxt %"PRIu64, sys_ctxt); - - off = strstr(toybuf, "procs_running"); - if (off) sscanf(off, "procs_running %u", proc_running); - (*proc_running)--; // look, i'm invisible. - - off = strstr(toybuf, "procs_blocked"); - if (off) sscanf(off, "procs_blocked %u", proc_blocked); - - close(fd); -} - -void read_proc_meminfo(unsigned long * mem_swapped, unsigned long * mem_free, - unsigned long * mem_buff, unsigned long * mem_cache) -{ - char * off; - unsigned long swap_total, swap_free; - int fd = xopen("/proc/meminfo", O_RDONLY); - size_t s = xread(fd, toybuf, sizeof(toybuf)-1); - toybuf[s] = 0; - if ( s == sizeof(toybuf)-1) - error_exit("/proc/meminfo is too large"); - - off = strstr(toybuf, "MemFree"); - if (off) sscanf(off, "MemFree: %lu kB", mem_free); - - off = strstr(toybuf, "Buffers"); - if (off) sscanf(off, "Buffers: %lu kB", mem_buff); - - off = strstr(toybuf, "Cached"); - if (off) sscanf(off, "Cached: %lu kB", mem_cache); - - off = strstr(toybuf, "SwapFree"); - if (off) sscanf(off, "SwapFree: %lu kB", &swap_free); - - off = strstr(toybuf, "SwapTotal"); - if (off) sscanf(off, "SwapTotal: %lu kB", &swap_total); - *mem_swapped = swap_total - swap_free; - - close(fd); -} - -void read_proc_vmstat(unsigned long * io_pages_in, unsigned long * io_pages_out, - unsigned long * swap_bytes_in, unsigned long * swap_bytes_out) -{ - char * off; - unsigned long s_pages_in, s_pages_out; - unsigned long pagesize_kb = sysconf(_SC_PAGESIZE) / 1024L; - int fd = xopen("/proc/vmstat", O_RDONLY); - size_t s = xread(fd, toybuf, sizeof(toybuf)-1); - toybuf[s] = 0; - if ( s == sizeof(toybuf)-1) - error_exit("/proc/vmstat is too large"); - - off = strstr(toybuf, "pgpgin"); - if (off) sscanf(off, "pgpgin %lu", io_pages_in); - - off = strstr(toybuf, "pgpgout"); - if (off) sscanf(off, "pgpgout %lu", io_pages_out); - - off = strstr(toybuf, "pswpin"); - if (off) sscanf(off, "pswpin %lu", &s_pages_in); - *swap_bytes_in = s_pages_in * pagesize_kb; - - off = strstr(toybuf, "pswpout"); - if (off) sscanf(off, "pswpout %lu", &s_pages_out); - *swap_bytes_out = s_pages_out * pagesize_kb; - - close(fd); -} - -void vmstat_main(void) -{ - const char fmt[] = "%2u %2u %6lu %6lu %6lu %6lu %4u %4u %5u %5u %4u %4u %2u %2u %2u %2u\n"; - unsigned int loop_num = 0, loop_max_num = 0, loop_delay = 0; - unsigned int running = 0, blocked = 0; - unsigned long mem_swap = 0, mem_free = 0, mem_buff = 0, mem_cache = 0; - unsigned long io_pages_in[2], io_pages_out[2], swap_bytes_in[2], swap_bytes_out[2]; - uint64_t sys_irq[2], sys_ctxt[2], cpu_user[2], cpu_sys[2], cpu_idle[2], cpu_wait[2]; - int first_run = 1; - int no_header = toys.optflags & 0x1; - unsigned num_rows = 22; - - if (toys.optc >= 1) - loop_delay = atoi(toys.optargs[0]); - if (toys.optc >= 2) - loop_max_num = atoi(toys.optargs[1]); - - if (loop_max_num < 0 || loop_delay < 0) - error_exit("Invalid arguments"); - - while(1) { - uint64_t total_jif; - int idx = loop_num%2; - - if(first_run || (!(loop_num % num_rows) && !no_header)) { - unsigned rows = 0, cols = 0; - terminal_size(&cols, &rows); - num_rows = (rows > 3)? rows - 3 : 22; - printf("procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----\n"); - printf(" r b swpd free buff cache si so bi bo in cs us sy id wa\n"); - } - - read_proc_stat(&running, &blocked, &sys_irq[idx], &sys_ctxt[idx], &cpu_user[idx], - &cpu_sys[idx], &cpu_idle[idx], &cpu_wait[idx]); - read_proc_meminfo(&mem_swap, &mem_free, &mem_buff, &mem_cache); - read_proc_vmstat(&io_pages_in[idx], &io_pages_out[idx], &swap_bytes_in[idx], &swap_bytes_out[idx]); - - if (first_run) { - struct sysinfo inf; - sysinfo(&inf); - first_run = 0; - total_jif = cpu_user[idx] + cpu_idle[idx] + cpu_wait[idx]; - printf(fmt, running, blocked, mem_swap, mem_free, mem_buff, mem_cache, - (unsigned) (swap_bytes_in[idx]/inf.uptime), - (unsigned) (swap_bytes_out[idx]/inf.uptime), - (unsigned) (io_pages_in[idx]/inf.uptime), - (unsigned) (io_pages_out[idx]/inf.uptime), - (unsigned) (sys_irq[idx]/inf.uptime), - (unsigned) (sys_ctxt[idx]/inf.uptime), - (unsigned) (100*cpu_user[idx]/total_jif), - (unsigned) (100*cpu_sys[idx]/total_jif), - (unsigned) (100*cpu_idle[idx]/total_jif), - (unsigned) (100*cpu_wait[idx]/total_jif)); - }else{ - total_jif = cpu_user[idx] - cpu_user[!idx] + cpu_idle[idx] - cpu_idle[!idx] + cpu_wait[idx] - cpu_wait[!idx]; - printf(fmt, running, blocked, mem_swap, mem_free, mem_buff, mem_cache, - (unsigned) ((swap_bytes_in[idx] - swap_bytes_in[!idx])/loop_delay), - (unsigned) ((swap_bytes_out[idx] - swap_bytes_out[!idx])/loop_delay), - (unsigned) ((io_pages_in[idx] - io_pages_in[!idx])/loop_delay), - (unsigned) ((io_pages_out[idx] - io_pages_out[!idx])/loop_delay), - (unsigned) ((sys_irq[idx] - sys_irq[!idx])/loop_delay), - (unsigned) ((sys_ctxt[idx] - sys_ctxt[!idx])/loop_delay), - (unsigned) (100*(cpu_user[idx] - cpu_user[!idx])/total_jif), - (unsigned) (100*(cpu_sys[idx] - cpu_sys[!idx]) /total_jif), - (unsigned) (100*(cpu_idle[idx] - cpu_idle[!idx])/total_jif), - (unsigned) (100*(cpu_wait[idx] - cpu_wait[!idx])/total_jif)); - } - - loop_num++; - if (loop_delay == 0 || (loop_max_num != 0 && loop_num >= loop_max_num)) - break; - sleep(loop_delay); - } -} |