X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=lttng%2Fcommands%2Fcalibrate.c;fp=lttng%2Fcommands%2Fcalibrate.c;h=40d1c45c2d83bebf3dc4fc5c2c823dd7ab085814;hp=0000000000000000000000000000000000000000;hb=d0254c7c0bb43c62abafdf866b16de0da1ad4d5d;hpb=d2abc4ee14cc1bb86ffa6cd024f18a671de8a32c diff --git a/lttng/commands/calibrate.c b/lttng/commands/calibrate.c new file mode 100644 index 000000000..40d1c45c2 --- /dev/null +++ b/lttng/commands/calibrate.c @@ -0,0 +1,198 @@ +/* + * Copyright (C) 2011 - David Goulet + * Copyright (C) 2011 - Mathieu Desnoyers + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; only version 2 + * of the License. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#define _GNU_SOURCE +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "../cmd.h" +#include "../conf.h" +#include "../utils.h" + +static int opt_event_type; +static char *opt_kernel; +static char *opt_cmd_name; +static int opt_pid_all; +static int opt_userspace; +static pid_t opt_pid; + +enum { + OPT_HELP = 1, + OPT_USERSPACE, + OPT_TRACEPOINT, + OPT_MARKER, + OPT_PROBE, + OPT_FUNCTION, + OPT_FUNCTION_ENTRY, +}; + +static struct poptOption long_options[] = { + /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ + {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, + {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0}, + {"userspace", 'u', POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, 0, OPT_USERSPACE, 0, 0}, + {"all", 0, POPT_ARG_VAL, &opt_pid_all, 1, 0, 0}, + {"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0}, + {"tracepoint", 0, POPT_ARG_NONE, 0, OPT_TRACEPOINT, 0, 0}, + {"marker", 0, POPT_ARG_NONE, 0, OPT_MARKER, 0, 0}, + {"probe", 0, POPT_ARG_NONE, 0, OPT_PROBE, 0, 0}, + {"function", 0, POPT_ARG_NONE, 0, OPT_FUNCTION, 0, 0}, + {"function:entry", 0, POPT_ARG_NONE, 0, OPT_FUNCTION_ENTRY, 0, 0}, + {0, 0, 0, 0, 0, 0, 0} +}; + +/* + * usage + */ +static void usage(FILE *ofp) +{ + fprintf(ofp, "usage: lttng calibrate [options] [calibrate_options]\n"); + fprintf(ofp, "\n"); + fprintf(ofp, " -h, --help Show this help\n"); + fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n"); + fprintf(ofp, " -u, --userspace [CMD] Apply for the user-space tracer\n"); + fprintf(ofp, " --all If -u, apply on all traceable apps\n"); + fprintf(ofp, " -p, --pid PID If -u, apply on a specific PID\n"); + fprintf(ofp, "\n"); + fprintf(ofp, "Calibrate options:\n"); + fprintf(ofp, " --tracepoint Tracepoint event (default)\n"); + fprintf(ofp, " --probe\n"); + fprintf(ofp, " Dynamic probe.\n"); + fprintf(ofp, " --function\n"); + fprintf(ofp, " Dynamic function entry/return probe.\n"); + fprintf(ofp, " --function:entry symbol\n"); + fprintf(ofp, " Function tracer event\n"); + fprintf(ofp, " --marker User-space marker (deprecated)\n"); + fprintf(ofp, "\n"); +} + +/* + * calibrate_lttng + * + * Calibrate LTTng. + */ +static int calibrate_lttng(void) +{ + int ret = CMD_SUCCESS; + struct lttng_domain dom; + struct lttng_calibrate calibrate; + + /* Create lttng domain */ + if (opt_kernel) { + dom.type = LTTNG_DOMAIN_KERNEL; + } + + /* Kernel tracer action */ + if (opt_kernel) { + switch (opt_event_type) { + case LTTNG_EVENT_TRACEPOINT: + DBG("Calibrating kernel tracepoints"); + break; + case LTTNG_EVENT_PROBE: + DBG("Calibrating kernel probes"); + break; + case LTTNG_EVENT_FUNCTION: + DBG("Calibrating kernel functions"); + calibrate.type = LTTNG_CALIBRATE_FUNCTION; + ret = lttng_calibrate(&dom, &calibrate); + break; + case LTTNG_EVENT_FUNCTION_ENTRY: + DBG("Calibrating kernel function entry"); + break; + default: + ret = CMD_NOT_IMPLEMENTED; + goto end; + } + } else if (opt_userspace) { /* User-space tracer action */ + /* + * TODO: Waiting on lttng UST 2.0 + */ + if (opt_pid_all) { + } else if (opt_pid != 0) { + } + ret = CMD_NOT_IMPLEMENTED; + goto end; + } else { + ERR("Please specify a tracer (kernel or user-space)"); + goto end; + } +end: + return ret; +} + +/* + * cmd_calibrate + * + * Calibrate LTTng tracer. + */ +int cmd_calibrate(int argc, const char **argv) +{ + int opt, ret; + static poptContext pc; + + pc = poptGetContext(NULL, argc, argv, long_options, 0); + poptReadDefaultConfig(pc, 0); + + /* Default event type */ + opt_event_type = LTTNG_EVENT_TRACEPOINT; + + while ((opt = poptGetNextOpt(pc)) != -1) { + switch (opt) { + case OPT_HELP: + usage(stderr); + ret = CMD_SUCCESS; + goto end; + case OPT_USERSPACE: + opt_userspace = 1; + opt_cmd_name = poptGetOptArg(pc); + break; + case OPT_TRACEPOINT: + ret = CMD_NOT_IMPLEMENTED; + break; + case OPT_MARKER: + ret = CMD_NOT_IMPLEMENTED; + goto end; + case OPT_PROBE: + ret = CMD_NOT_IMPLEMENTED; + break; + case OPT_FUNCTION: + opt_event_type = LTTNG_EVENT_FUNCTION; + break; + case OPT_FUNCTION_ENTRY: + ret = CMD_NOT_IMPLEMENTED; + break; + default: + usage(stderr); + ret = CMD_UNDEFINED; + goto end; + } + } + + ret = calibrate_lttng(); + +end: + return ret; +}