Messages in this thread | | | Date | Mon, 18 Aug 2014 11:16:56 +0200 | From | Matthieu CASTET <> | Subject | Re: perf on biarch |
| |
Le Fri, 8 Aug 2014 13:50:52 -0600, David Ahern <dsahern@gmail.com> a écrit :
> On 8/8/14, 10:40 AM, Matthieu CASTET wrote: > > Hi, > > > > I have a 64 bits kernel running with 32 bits binaries. > > If I run 32 bits perf on this 64 bits kernel 3.14, I got weird result : > > > > - perf trace doesn't work [1] > > I have patches that fix that: > git clone https://github.com/dsahern/linux.git > git checkout perf-full-monty > > And if autodetection fails you can manually force it with -M x86. > Thanks david. It is better, but it seems there are problem with argument parsing.
For example for "mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xf77e2000" I got : - 2.847 ( 0.004 ms): mmap2(arg0: 0, arg1: 0, arg2: 4096, arg3: 0, arg4: 3, arg5: 0 ) = -143273984
Note the 4096 position. Running perf trace on a 32 bits kernel give 4096 at arg1.
Matthieu -- 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/
| |