- fprintf(ofp, " -h, --help Show this help\n");
- fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n");
- fprintf(ofp, " -u, --userspace 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, "Channel options:\n");
+ fprintf(ofp, " --discard Discard event when buffers are full%s\n",
+ DEFAULT_CHANNEL_OVERWRITE ? "" : " (default)");
+ fprintf(ofp, " --overwrite Flight recorder mode%s\n",
+ DEFAULT_CHANNEL_OVERWRITE ? " (default)" : "");
+ fprintf(ofp, " --subbuf-size Subbuffer size in bytes\n");
+ fprintf(ofp, " (default: %u, kernel default: %u)\n",
+ DEFAULT_CHANNEL_SUBBUF_SIZE,
+ DEFAULT_KERNEL_CHANNEL_SUBBUF_SIZE);
+ fprintf(ofp, " --num-subbuf Number of subbufers\n");
+ fprintf(ofp, " (default: %u, kernel default: %u)\n",
+ DEFAULT_CHANNEL_SUBBUF_NUM,
+ DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM);
+ fprintf(ofp, " --switch-timer Switch timer interval in usec (default: %u)\n",
+ DEFAULT_CHANNEL_SWITCH_TIMER);
+ fprintf(ofp, " --read-timer Read timer interval in usec (default: %u)\n",
+ DEFAULT_CHANNEL_READ_TIMER);