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-rw-r--r--sys-utils/irqtop.c341
1 files changed, 341 insertions, 0 deletions
diff --git a/sys-utils/irqtop.c b/sys-utils/irqtop.c
new file mode 100644
index 0000000..4363fff
--- /dev/null
+++ b/sys-utils/irqtop.c
@@ -0,0 +1,341 @@
+/*
+ * irqtop.c - utility to display kernel interrupt information.
+ *
+ * Copyright (C) 2019 zhenwei pi <pizhenwei@bytedance.com>
+ * Copyright (C) 2020 Karel Zak <kzak@redhat.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#include <ctype.h>
+#include <errno.h>
+#include <getopt.h>
+#include <limits.h>
+#include <locale.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/epoll.h>
+#include <sys/ioctl.h>
+#include <sys/select.h>
+#include <sys/signalfd.h>
+#include <sys/time.h>
+#include <sys/timerfd.h>
+#include <sys/types.h>
+#include <termios.h>
+#include <unistd.h>
+
+#ifdef HAVE_SLCURSES_H
+# include <slcurses.h>
+#elif defined(HAVE_SLANG_SLCURSES_H)
+# include <slang/slcurses.h>
+#elif defined(HAVE_NCURSESW_NCURSES_H) && defined(HAVE_WIDECHAR)
+# include <ncursesw/ncurses.h>
+#elif defined(HAVE_NCURSES_H)
+# include <ncurses.h>
+#elif defined(HAVE_NCURSES_NCURSES_H)
+# include <ncurses/ncurses.h>
+#endif
+
+#ifdef HAVE_WIDECHAR
+# include <wctype.h>
+# include <wchar.h>
+#endif
+
+#include <libsmartcols.h>
+
+#include "closestream.h"
+#include "monotonic.h"
+#include "pathnames.h"
+#include "strutils.h"
+#include "timeutils.h"
+#include "ttyutils.h"
+#include "xalloc.h"
+
+#include "irq-common.h"
+
+#define MAX_EVENTS 3
+
+/* top control struct */
+struct irqtop_ctl {
+ WINDOW *win;
+ int cols;
+ int rows;
+ char *hostname;
+
+ struct itimerspec timer;
+ struct irq_stat *prev_stat;
+
+ unsigned int request_exit:1;
+};
+
+/* user's input parser */
+static void parse_input(struct irqtop_ctl *ctl, struct irq_output *out, char c)
+{
+ switch (c) {
+ case 'q':
+ case 'Q':
+ ctl->request_exit = 1;
+ break;
+ default:
+ set_sort_func_by_key(out, c);
+ break;
+ }
+}
+
+static int update_screen(struct irqtop_ctl *ctl, struct irq_output *out)
+{
+ struct libscols_table *table;
+ struct irq_stat *stat;
+ time_t now = time(NULL);
+ char timestr[64], *data;
+
+ table = get_scols_table(out, ctl->prev_stat, &stat);
+ if (!table) {
+ ctl->request_exit = 1;
+ return 1;
+ }
+
+ /* header in interactive mode */
+ move(0, 0);
+ strtime_iso(&now, ISO_TIMESTAMP, timestr, sizeof(timestr));
+ wprintw(ctl->win, _("irqtop | total: %ld delta: %ld | %s | %s\n\n"),
+ stat->total_irq, stat->delta_irq, ctl->hostname, timestr);
+
+ scols_print_table_to_string(table, &data);
+ wprintw(ctl->win, "%s", data);
+ free(data);
+
+ /* clean up */
+ scols_unref_table(table);
+ if (ctl->prev_stat)
+ free_irqstat(ctl->prev_stat);
+ ctl->prev_stat = stat;
+ return 0;
+}
+
+static int event_loop(struct irqtop_ctl *ctl, struct irq_output *out)
+{
+ int efd, sfd, tfd;
+ sigset_t sigmask;
+ struct signalfd_siginfo siginfo;
+ struct epoll_event ev, events[MAX_EVENTS];
+ long int nr;
+ uint64_t unused;
+ int retval = 0;
+
+ efd = epoll_create1(0);
+
+ if ((tfd = timerfd_create(CLOCK_MONOTONIC, 0)) < 0)
+ err(EXIT_FAILURE, _("cannot not create timerfd"));
+ if (timerfd_settime(tfd, 0, &ctl->timer, NULL) != 0)
+ err(EXIT_FAILURE, _("cannot set timerfd"));
+
+ ev.events = EPOLLIN;
+ ev.data.fd = tfd;
+ if (epoll_ctl(efd, EPOLL_CTL_ADD, tfd, &ev) != 0)
+ err(EXIT_FAILURE, _("epoll_ctl failed"));
+
+ if (sigfillset(&sigmask) != 0)
+ err(EXIT_FAILURE, _("sigfillset failed"));
+ if (sigprocmask(SIG_BLOCK, &sigmask, NULL) != 0)
+ err(EXIT_FAILURE, _("sigprocmask failed"));
+
+ sigaddset(&sigmask, SIGWINCH);
+ sigaddset(&sigmask, SIGTERM);
+ sigaddset(&sigmask, SIGINT);
+ sigaddset(&sigmask, SIGQUIT);
+
+ if ((sfd = signalfd(-1, &sigmask, SFD_CLOEXEC)) < 0)
+ err(EXIT_FAILURE, _("cannot not create signalfd"));
+
+ ev.events = EPOLLIN;
+ ev.data.fd = sfd;
+ if (epoll_ctl(efd, EPOLL_CTL_ADD, sfd, &ev) != 0)
+ err(EXIT_FAILURE, _("epoll_ctl failed"));
+
+ ev.events = EPOLLIN;
+ ev.data.fd = STDIN_FILENO;
+ if (epoll_ctl(efd, EPOLL_CTL_ADD, STDIN_FILENO, &ev) != 0)
+ err(EXIT_FAILURE, _("epoll_ctl failed"));
+
+ retval |= update_screen(ctl, out);
+ refresh();
+
+ while (!ctl->request_exit) {
+ const ssize_t nr_events = epoll_wait(efd, events, MAX_EVENTS, -1);
+
+ for (nr = 0; nr < nr_events; nr++) {
+ if (events[nr].data.fd == tfd) {
+ if (read(tfd, &unused, sizeof(unused)) < 0)
+ warn(_("read failed"));
+ } else if (events[nr].data.fd == sfd) {
+ if (read(sfd, &siginfo, sizeof(siginfo)) < 0) {
+ warn(_("read failed"));
+ continue;
+ }
+ if (siginfo.ssi_signo == SIGWINCH) {
+ get_terminal_dimension(&ctl->cols, &ctl->rows);
+#if HAVE_RESIZETERM
+ resizeterm(ctl->rows, ctl->cols);
+#endif
+ }
+ else {
+ ctl->request_exit = 1;
+ break;
+ }
+ } else if (events[nr].data.fd == STDIN_FILENO) {
+ char c;
+
+ if (read(STDIN_FILENO, &c, 1) != 1)
+ warn(_("read failed"));
+ parse_input(ctl, out, c);
+ } else
+ abort();
+ retval |= update_screen(ctl, out);
+ refresh();
+ }
+ }
+ return retval;
+}
+
+static void __attribute__((__noreturn__)) usage(void)
+{
+ fputs(USAGE_HEADER, stdout);
+ printf(_(" %s [options]\n"), program_invocation_short_name);
+ fputs(USAGE_SEPARATOR, stdout);
+
+ puts(_("Interactive utility to display kernel interrupt information."));
+
+ fputs(USAGE_OPTIONS, stdout);
+ fputs(_(" -d, --delay <secs> delay updates\n"), stdout);
+ fputs(_(" -o, --output <list> define which output columns to use\n"), stdout);
+ fputs(_(" -s, --sort <column> specify sort column\n"), stdout);
+ fputs(USAGE_SEPARATOR, stdout);
+ printf(USAGE_HELP_OPTIONS(22));
+
+ fputs(_("\nThe following interactive key commands are valid:\n"), stdout);
+ fputs(_(" i sort by IRQ\n"), stdout);
+ fputs(_(" t sort by TOTAL\n"), stdout);
+ fputs(_(" d sort by DELTA\n"), stdout);
+ fputs(_(" n sort by NAME\n"), stdout);
+ fputs(_(" q Q quit program\n"), stdout);
+
+ fputs(USAGE_COLUMNS, stdout);
+ irq_print_columns(stdout, 0);
+
+ printf(USAGE_MAN_TAIL("irqtop(1)"));
+ exit(EXIT_SUCCESS);
+}
+
+static void parse_args( struct irqtop_ctl *ctl,
+ struct irq_output *out,
+ int argc,
+ char **argv)
+{
+ const char *outarg = NULL;
+ static const struct option longopts[] = {
+ {"delay", required_argument, NULL, 'd'},
+ {"sort", required_argument, NULL, 's'},
+ {"output", required_argument, NULL, 'o'},
+ {"help", no_argument, NULL, 'h'},
+ {"version", no_argument, NULL, 'V'},
+ {NULL, 0, NULL, 0}
+ };
+ int o;
+
+ while ((o = getopt_long(argc, argv, "d:o:s:hV", longopts, NULL)) != -1) {
+ switch (o) {
+ case 'd':
+ {
+ struct timeval delay;
+
+ strtotimeval_or_err(optarg, &delay,
+ _("failed to parse delay argument"));
+ TIMEVAL_TO_TIMESPEC(&delay, &ctl->timer.it_interval);
+ ctl->timer.it_value = ctl->timer.it_interval;
+ }
+ break;
+ case 's':
+ set_sort_func_by_name(out, optarg);
+ break;
+ case 'o':
+ outarg = optarg;
+ break;
+ case 'V':
+ print_version(EXIT_SUCCESS);
+ case 'h':
+ usage();
+ default:
+ errtryhelp(EXIT_FAILURE);
+ }
+ }
+
+ /* default */
+ if (!out->ncolumns) {
+ out->columns[out->ncolumns++] = COL_IRQ;
+ out->columns[out->ncolumns++] = COL_TOTAL;
+ out->columns[out->ncolumns++] = COL_DELTA;
+ out->columns[out->ncolumns++] = COL_NAME;
+ }
+
+ /* add -o [+]<list> to putput */
+ if (outarg && string_add_to_idarray(outarg, out->columns,
+ ARRAY_SIZE(out->columns),
+ &out->ncolumns,
+ irq_column_name_to_id) < 0)
+ exit(EXIT_FAILURE);
+}
+
+int main(int argc, char **argv)
+{
+ int is_tty = 0;
+ struct termios saved_tty;
+ struct irq_output out = {
+ .ncolumns = 0
+ };
+ struct irqtop_ctl ctl = {
+ .timer.it_interval = {3, 0},
+ .timer.it_value = {3, 0}
+ };
+
+ setlocale(LC_ALL, "");
+
+ parse_args(&ctl, &out, argc, argv);
+
+ is_tty = isatty(STDIN_FILENO);
+ if (is_tty && tcgetattr(STDIN_FILENO, &saved_tty) == -1)
+ fputs(_("terminal setting retrieval"), stdout);
+
+ ctl.win = initscr();
+ get_terminal_dimension(&ctl.cols, &ctl.rows);
+#if HAVE_RESIZETERM
+ resizeterm(ctl.rows, ctl.cols);
+#endif
+ curs_set(0);
+
+ ctl.hostname = xgethostname();
+ event_loop(&ctl, &out);
+
+ free_irqstat(ctl.prev_stat);
+ free(ctl.hostname);
+
+ if (is_tty)
+ tcsetattr(STDIN_FILENO, TCSAFLUSH, &saved_tty);
+ delwin(ctl.win);
+ endwin();
+
+ return EXIT_SUCCESS;
+}
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