On Tue, 19 Apr 2016 11:57:32 -0700 "H. Peter Anvin" <hpa@xxxxxxxxx> wrote: > Also, I understand there is one of these bitmaps per ring buffer, and > the ring buffer is in the tens of megabytes. Right, there's only one bitmap per tracing instance, which in most cases is just one (I know of people who make more). And by default, the tracing buffer is 1.4 megs per CPU. If you have a pid_max of the max size, I highly doubt you will be doing that on a single CPU machine. If you have 48 CPUs, the ring buffer will be 1.4 * 48 megs, making the 1/2 meg bitmap a nit. I will say, there may be two bitmaps soon, because I plan on adding this same code to the function tracer logic. -- Steve -- To unsubscribe from this list: send the line "unsubscribe linux-trace-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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