Re: [igt-dev] [PATCH i-g-t 2/8] tests/i915/gem_exec_capture: Cope with larger page sizes

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On 10/29/2021 10:39, Matthew Brost wrote:
On Thu, Oct 21, 2021 at 04:40:38PM -0700, John.C.Harrison@xxxxxxxxx wrote:
From: John Harrison <John.C.Harrison@xxxxxxxxx>

At some point, larger than 4KB page sizes were added to the i915
driver. This included adding an informational line to the buffer
entries in error capture logs. However, the error capture test was not
updated to skip this string, thus it would silently abort processing.

Signed-off-by: John Harrison <John.C.Harrison@xxxxxxxxx>
---
  tests/i915/gem_exec_capture.c | 6 ++++++
  1 file changed, 6 insertions(+)

diff --git a/tests/i915/gem_exec_capture.c b/tests/i915/gem_exec_capture.c
index 53649cdb2..47ca64dd6 100644
--- a/tests/i915/gem_exec_capture.c
+++ b/tests/i915/gem_exec_capture.c
@@ -484,6 +484,12 @@ static void many(int fd, int dir, uint64_t size, unsigned int flags)
  		addr |= strtoul(str + 1, &str, 16);
  		igt_assert(*str++ == '\n');
+ /* gtt_page_sizes = 0x00010000 */
+		if (strncmp(str, "gtt_page_sizes = 0x", 19) == 0) {
+			str += 19 + 8;
+			igt_assert(*str++ == '\n');
+		}
Can you explain this logic to me, for the life of me I can't figure out
what this doing. That probably warrent's a more detailed comment too.
It's no different to the rest of the processing that this code was already doing.

if( start_of_current_line == "gtt_page_sizes = 0x") {
    current_line += strlen(above_string) + strlen(8-digit hex string);
    assert( next_character_of_current_line == end_of_line);
}

I.e. skip over any line that just contains the page size message.

John.


Matt

+
  		if (!(*str == ':' || *str == '~'))
  			continue;
--
2.25.1





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