Messages in this thread | | | Date | Wed, 23 Sep 2009 17:00:43 +0300 | From | Avi Kivity <> | Subject | Re: [patch] Re: [perf] Finding uninstalled modules Was Re: mailing list for trace users |
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On 09/23/2009 04:50 PM, Mike Galbraith wrote: > On Wed, 2009-09-23 at 16:10 +0300, Avi Kivity wrote: > >> On 09/23/2009 03:58 PM, Avi Kivity wrote:On 09/23/2009 03:58 PM, Avi >> Kivity wrote: >> >>> Not for me. 'perf report', for example, shows >>> >>> 63.08% qemu-system-x86 >>> [kernel] [k] packet_exit >>> 4.71% qemu-system-x86 >>> [kernel] [k] hpet_next_event >>> 4.38% init >>> [kernel] [k] >>> mwait_idle_with_hints >>> >>> While 'perf top' still shows vmx_vcpu_run. >>> >>> >> strace says: >> >> getcwd("/home/avi/kvm/linux-2.6"..., 4096) = 24 >> ... >> [no chdir] >> ... >> open("kernel/arch/x86/kvm/kvm-intel.ko", O_RDONLY) = -1 ENOENT (No >> such file or directory) >> > *blink* > > >> That "kernel/" looks like it was meant for /lib/modules, not a kernel >> tree. If I run 'perf report' from /lib/modules/2.6.31 I see vmx_vcpu_run. >> > So I need what's in your modules.dep to figure out where the rest of the > path went. > >
Mine says:
kernel/arch/x86/kvm/kvm.ko: kernel/arch/x86/kvm/kvm-intel.ko: kernel/arch/x86/kvm/kvm.ko
Which is reasonable for /lib/modules/2.6.31, not for a source directory.
> /lib/modules/2.6.32-tip-smp/kernel/arch/x86/kvm/kvm-intel.ko > > static int mod_dso__load_module_paths(struct mod_dso *self) > { > struct utsname uts; > int count = 0, len; > char *line = NULL; > FILE *file; > char *path; > size_t n; > > if (uname(&uts)< 0) > goto out_failure; > > len = strlen("/lib/modules/"); > len += strlen(uts.release); > len += strlen("/modules.dep"); > > path = calloc(1, len); >
len + 1
> if (path == NULL) > goto out_failure; > > strcat(path, "/lib/modules/"); > strcat(path, uts.release); > strcat(path, "/modules.dep"); > > file = fopen(path, "r"); > >
-- error compiling committee.c: too many arguments to function
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