Re: [Xen-devel] no cycles for certain xentrace entries

[George Dunlap <George.Dunlap@xxxxxxxxxxxxx>]

Thanks for the patch; I'll take a look and apply what I can.  What 
version of gcc / what flags are you using?
 -George

On 30/09/10 15:18, Olaf Hering wrote:
> On Thu, Sep 30, George Dunlap wrote:
>
> > Have you tried using xenalyze to analyze your trace?
> >
> > http://xenbits.xensource.com/ext/xenalyze.hg
> I will try it, thanks.
>
> To build it, these changes are needed:
>
>
> xenalyze.c:8038: error: ignoring return value of 'pipe', declared with attribute warn_unused_result
> xenalyze.c:7731: error: 'toplevel' may be used uninitialized in this function
> xenalyze.c:6168: error: 'e.pte' may be used uninitialized in this function
> xenalyze.c:6168: error: 'e.addr' may be used uninitialized in this function
> xenalyze.c:6168: error: 'e.eip' may be used uninitialized in this function
> xenalyze.c:7360: error: 'first_tsc' may be used uninitialized in this function
> xenalyze.c:6611: error: 'sevt.new_runstate' may be used uninitialized in this 
> function
> xenalyze.c:6611: error: 'sevt.old_runstate' may be used uninitialized in this 
> function
> xenalyze.c:6591: error: 'type' may be used uninitialized in this function
>
> ---
>   xenalyze.c |   10 ++++++----
>   1 file changed, 6 insertions(+), 4 deletions(-)
>
> --- xenalyze.hg/xenalyze.c
> +++ xenalyze.hg/xenalyze.c
> @@ -6167,6 +6167,7 @@ void pv_ptwr_emulation_process(struct re
>           unsigned long long pte, addr, eip;
>       } e;
>
> +    memset(&e, 0x5a, sizeof(e));
>       switch ( pevt.minor ) {
>       case PV_PTWR_EMULATION_PAE:
>           if ( pevt.x64 )
> @@ -6622,6 +6623,7 @@ void sched_runstate_process(struct pcpu_
>           sevt.old_runstate = _sevt.old_runstate;
>           break;
>       case 2:
> +    default:
>           type = CONTINUE;
>           sevt.new_runstate = sevt.old_runstate = RUNSTATE_RUNNING;
>           break;
> @@ -7366,8 +7368,7 @@ void process_lost_records(struct pcpu_in
>                   ri->extra_words);
>           dump_unexpected_and_exit(ri);
>       }
> -    else
> -        first_tsc = r->first_tsc;
> +    first_tsc = r->first_tsc;
>
>       if(opt.dump_cooked || opt.dump_all)
>       {
> @@ -7728,7 +7729,7 @@ void create_dump_header(struct record_in
>
>   int find_toplevel_event(struct record_info *ri)
>   {
> -    int toplevel, i, count;
> +    int toplevel = 0, i, count;
>
>       for(i=0, count=0; i<TOPLEVEL_MAX; i++)
>           if(ri->evt.main&  (1UL<<i))
> @@ -8035,7 +8036,8 @@ void progress_child_exec(void) {
>   void progress_init(void) {
>       int pid;
>
> -    pipe(G.progress.pipe);
> +    if (pipe(G.progress.pipe)<  0)
> +           perror("pipe");
>
>       if(!(pid = fork())) {
>           progress_child_exec();
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