Hi,
I am writing a test app to benchmark Java using LTTng. I am first trying
to familiarize myself with the interface, and wanted to use the
"write_event" file in /mnt/debugfs/ltt as detailed in the help file.
I wrote some C test programs and I am getting some odd functionality.
<code>
#include <stdio.h>
#include <time.h>
int main(int argc, char* argv[])
{
int i = 0;
for( i = 0 ; i < 10000 ; i++)
{
system("echo \"Hello world\" >/mnt/debugfs/ltt/write_event");
usleep(3);
}
return 0;
}
</code>
or
<code>
#include <stdio.h>
#include <time.h>
int main(int argc, char* argv[])
{
int i = 0;
for( i = 0 ; i < 10000 ; i++)
{
FILE *f;
f = fopen("/mnt/debugfs/ltt/write_event", "w");
fputs("Hello World" , f);
fclose(f);
usleep(3);
}
return 0;
}
</code>
I would basically get an event generated rarely, containing MANY
hello_worlds.
Is there a way to force the file to flush and write immediately. That
way the events would be in the right parts of the traces and make the
reading much easier.
Thank You,
Matt.
_______________________________________________
ltt-dev mailing list
[email protected]
http://lists.casi.polymtl.ca/cgi-bin/mailman/listinfo/ltt-dev
