On Tue, 9 Feb 2021 19:01:04 +0200
Tzvetomir Stoyanov <tz.stoyanov@xxxxxxxxx> wrote:
> > Ok, is there a WiP already, or someone working on it? I'm asking
> > because maybe I can help.
>
> None is working on that yet, any help is highly appreciated :) I just
> created an issue in Bugzilla for that:
> https://bugzilla.kernel.org/show_bug.cgi?id=211657
I had the below patch locally for some time now. It's a somewhat a hack, but
should work. But this should be done properly. The hack below works if you
include only two files, the host first followed by the guest:
trace-cmd report -i trace-host.dat -i trace-guest.dat
Also, the following patch should be applied as well:
https://patchwork.kernel.org/project/linux-trace-devel/patch/20210210164543.5ecd9dbd@xxxxxxxxxxxxxxxxxx/
-- Steve
Index: trace-cmd.git/tracecmd/trace-read.c
===================================================================
--- trace-cmd.git.orig/tracecmd/trace-read.c
+++ trace-cmd.git/tracecmd/trace-read.c
@@ -339,6 +339,9 @@ static void add_input(const char *file)
last_input_file = item;
}
+static struct tracecmd_input *host;
+static struct tracecmd_input *guest;
+
static void add_handle(struct tracecmd_input *handle, const char *file)
{
struct handle_list *item;
@@ -358,6 +361,12 @@ static void add_handle(struct tracecmd_i
max_file_size = strlen(item->file);
}
list_add_tail(&item->list, &handle_list);
+ if (handle_list.next != &item->list) {
+ item = container_of(handle_list.next,
+ struct handle_list, list);
+ host = item->handle;
+ guest = handle;
+ }
}
static void free_inputs(void)
@@ -1283,6 +1292,8 @@ static void read_data_info(struct list_h
}
}
+ tracecmd_pair_peer(guest, host);
+
if (otype != OUTPUT_NORMAL)
return;
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