Messages in this thread | | | From | Denys Vlasenko <> | Subject | Re: [RFC][PATCH] /proc/<pid>/pmaps - memory maps in granularity of pages | Date | Wed, 5 Sep 2007 13:24:59 +0100 |
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On Tuesday 14 August 2007 17:26, Matt Mackall wrote: > On Tue, Aug 14, 2007 at 04:52:04PM +0800, Fengguang Wu wrote: > > Here is a sample output: > > > > # cat /proc/$$/pmaps > > 080c9000-080f6000 rwxp 080c9000 00:00 0 [heap] > > 32969 45 Y_A_P__ 1 ... > > f7de1000-f7de3000 rwxp 00011000 03:00 176630 /lib/libnsl-2.3.6.so > > 17 2 Y_A_P__ 1 > > [...] > > That's a _lot_ of data to generate and parse. I doubt we can watch a > larger app in realtime with this interface. And it doesn't give us > physical page numbers either.
> > 080c9000-080f6000 rwxp 080c9000 00:00 0 [heap] > > 32969 45 Y_A_P__ 1 ^^^^^ ^^ > > f7dba000-f7dc3000 r-xp 00000000 03:00 176633 /lib/libnss_files-2.3.6.so ^^ ^^ ^^^^^^
Since it's a new /proc file, we are not bound by compatibility.
Export *all* numbers in hex, and ensure that they are always even-chars wide ("fff" bad, "0fff" good). This way you can do binary<->string conversions (both in kernel and in userspace) 8 bits per CPU cycle, or even faster. -- vda - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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