[PATCH v2 0/3] drm/xe: shrink and compress GuC snapshot dumps

[Zhanjun Dong <zhanjun.dong@intel.com>]

GuC snapshot output is currently expensive in both size and latency: large
log buffers are emitted as raw ascii85, and the surrounding dump text
includes a bit of avoidable noise. This series makes xe snapshot dumps more
compact and easier to handle by compressing the large binary payloads,
tightening the textual output, and trimming the default GuC log size.

Select ZSTD_COMPRESS/ZSTD_DECOMPRESS in DRM_XE so the xe module pulls in
the zstd compressor when built.

Reduces the default GuC log buffer from 8MB to 2MB, which still preserves
useful history while cutting dump latency and dmesg load; with typical
compression, the emitted payload drops further.

Signed-off-by: Zhanjun Dong <zhanjun.dong@intel.com>

History:
v2: Fix Kunit test error by selecting ZSTD_DECOMPRESS in DRM_XE config,
    required by zstd_is_error/zstd_get_error_name.

Zhanjun Dong (3):
  drm/xe/guc: Compress GuC log and CTB dump with zstd
  drm/xe: Remove extra newlines from LRC snapshot dump
  drm/xe/guc: Reduce GuC log size from 8MB to 2MB

 drivers/gpu/drm/xe/Kconfig      |   2 +
 drivers/gpu/drm/xe/xe_guc_ct.c  |   9 ++-
 drivers/gpu/drm/xe/xe_guc_log.c | 110 ++++++++++++++++++++++++++++----
 drivers/gpu/drm/xe/xe_guc_log.h |   5 +-
 drivers/gpu/drm/xe/xe_lrc.c     |   4 +-
 5 files changed, 109 insertions(+), 21 deletions(-)

-- 
2.34.1