> On Jan 16, 2018, at 1:59 PM, Chuck Atkins <chuck.atk...@kitware.com> wrote:
>
> Part 2 of 2 (part 1 is autoconf changes, part 2 is C++ changes)
>
> When only a single SWR architecture is being used, this allows that
> architecture to be builtin rather than as a separate libswrARCH.so that
> gets loaded via dlopen. Since there are now several different code
> paths for each detected CPU architecture, the log output is also
> adjusted to convey where the backend is getting loaded from.
>
> This allows SWR to be used for static mesa builds which are still
> important for large HPC environments where shared libraries can impose
> unacceptable application startup times as hundreds of thousands of copies
> of the libs are loaded from a shared parallel filesystem.
>
> Based on an initial implementation by Tim Rowley.
>
> Signed-off-by: Chuck Atkins <chuck.atk...@kitware.com>
> CC: Tim Rowley <timothy.o.row...@intel.com>
> CC: Bruce Cherniak <bruce.chern...@intel.com>
> ---
> src/gallium/drivers/swr/swr_loader.cpp | 94 ++++++++++++++++++++++------------
> 1 file changed, 60 insertions(+), 34 deletions(-)
>
> diff --git a/src/gallium/drivers/swr/swr_loader.cpp
> b/src/gallium/drivers/swr/swr_loader.cpp
> index 9d6f918e34..57f826fd59 100644
> --- a/src/gallium/drivers/swr/swr_loader.cpp
> +++ b/src/gallium/drivers/swr/swr_loader.cpp
> @@ -31,78 +31,104 @@
> struct pipe_screen *
> swr_create_screen(struct sw_winsys *winsys)
> {
> + struct pipe_screen *screen = swr_create_screen_internal(winsys);
> +
> + bool found = false;
> + bool is_knl = false;
> +
> +#ifndef HAVE_SWR_BUILTIN
> char filename[256] = { 0 };
> - fprintf(stderr, "SWR detected ");
> +#endif
>
> - util_dl_library *pLibrary = nullptr;
>
> util_cpu_detect();
>
> - bool is_knl = false;
> -
> - if (!strlen(filename) &&
> - util_cpu_caps.has_avx512f && util_cpu_caps.has_avx512er) {
> -#if HAVE_SWR_KNL
> - fprintf(stderr, "KNL ");
> + if (!found && util_cpu_caps.has_avx512f && util_cpu_caps.has_avx512er) {
> + fprintf(stderr, "SWR detected KNL instruction support ");
> +#ifndef HAVE_SWR_KNL
> + fprintf(stderr, "(skipping; not built).\n");
> +#else
Each of the below #ifdef HAVE_SWR_BUILTIN clauses are identical, except the
filename.
Could you instead just setup the filename, set found = true (and the one
is_knl), then do
the BUILTIN work all in one place...
> + #ifdef HAVE_SWR_BUILTIN
> + swr_screen(screen)->pfnSwrGetInterface = SwrGetInterface;
> + fprintf(stderr, "(using; builtin).\n");
> + #else
> sprintf(filename, "%s%s%s", UTIL_DL_PREFIX, "swrKNL", UTIL_DL_EXT);
> + fprintf(stderr, "(using; %s).\n", filename);
> + #endif
> + found = true;
> is_knl = true;
> -#else
> - fprintf(stderr, "KNL (not built) ");
> #endif
> }
>
> - if (!strlen(filename) &&
> - util_cpu_caps.has_avx512f && util_cpu_caps.has_avx512bw) {
> -#if HAVE_SWR_SKX
> - fprintf(stderr, "SKX ");
> - sprintf(filename, "%s%s%s", UTIL_DL_PREFIX, "swrSKX", UTIL_DL_EXT);
> + if (!found && util_cpu_caps.has_avx512f && util_cpu_caps.has_avx512bw) {
> + fprintf(stderr, "SWR detected SKX instruction support ");
> +#ifndef HAVE_SWR_SKX
> + fprintf(stderr, "(skipping; not built).\n");
> #else
> - fprintf(stderr, "SKX (not built) ");
> + #ifdef HAVE_SWR_BUILTIN
> + swr_screen(screen)->pfnSwrGetInterface = SwrGetInterface;
> + fprintf(stderr, "(using; builtin).\n");
> + #else
> + sprintf(filename, "%s%s%s", UTIL_DL_PREFIX, "swrSKX", UTIL_DL_EXT);
> + fprintf(stderr, "(using; %s).\n", filename);
> + #endif
> + found = true;
> #endif
> }
>
> - if (!strlen(filename) && util_cpu_caps.has_avx2) {
> -#if HAVE_SWR_AVX2
> - fprintf(stderr, "AVX2 ");
> - sprintf(filename, "%s%s%s", UTIL_DL_PREFIX, "swrAVX2", UTIL_DL_EXT);
> + if (!found && util_cpu_caps.has_avx2) {
> + fprintf(stderr, "SWR detected AVX2 instruction support ");
> +#ifndef HAVE_SWR_AVX2
> + fprintf(stderr, "(skipping; not built).\n");
> #else
> - fprintf(stderr, "AVX2 (not built) ");
> + #ifdef HAVE_SWR_BUILTIN
> + swr_screen(screen)->pfnSwrGetInterface = SwrGetInterface;
> + fprintf(stderr, "(using; builtin).\n");
> + #else
> + sprintf(filename, "%s%s%s", UTIL_DL_PREFIX, "swrAVX2", UTIL_DL_EXT);
> + fprintf(stderr, "(using; %s).\n", filename);
> + #endif
> + found = true;
> #endif
> }
>
> - if (!strlen(filename) && util_cpu_caps.has_avx) {
> -#if HAVE_SWR_AVX
> - fprintf(stderr, "AVX ");
> - sprintf(filename, "%s%s%s", UTIL_DL_PREFIX, "swrAVX", UTIL_DL_EXT);
> + if (!found && util_cpu_caps.has_avx) {
> + fprintf(stderr, "SWR detected AVX instruction support ");
> +#ifndef HAVE_SWR_AVX
> + fprintf(stderr, "(skipping; not built).\n");
> #else
> - fprintf(stderr, "AVX (not built) ");
> + #ifdef HAVE_SWR_BUILTIN
> + swr_screen(screen)->pfnSwrGetInterface = SwrGetInterface;
> + fprintf(stderr, "(using; builtin).\n");
> + #else
> + sprintf(filename, "%s%s%s", UTIL_DL_PREFIX, "swrAVX", UTIL_DL_EXT);
> + fprintf(stderr, "(using; %s).\n", filename);
> + #endif
> + found = true;
> #endif
> }
>
> - if (!strlen(filename)) {
> - fprintf(stderr, "- no appropriate swr architecture library.
> Aborting!\n");
> + if (!found) {
> + fprintf(stderr, "SWR could not detect a supported CPU
> architecture.\n");
> exit(-1);
> - } else {
> - fprintf(stderr, "\n");
> }
>
> - pLibrary = util_dl_open(filename);
> -
Here, you can do the BUILTIN
swr_screen(screen)->pfnSwrGetInterface = SwrGetInterface;
fprintf(stderr, "(using; builtin).\n");
or open the correct library and print which one we're using (
#else
> +#ifndef HAVE_SWR_BUILTIN
> + util_dl_library *pLibrary = util_dl_open(filename);
> if (!pLibrary) {
> fprintf(stderr, "SWR library load failure: %s\n", util_dl_error());
> exit(-1);
> }
>
> util_dl_proc pApiProc = util_dl_get_proc_address(pLibrary,
> "SwrGetInterface");
> -
> if (!pApiProc) {
> fprintf(stderr, "SWR library search failure: %s\n", util_dl_error());
> exit(-1);
> }
>
> - struct pipe_screen *screen = swr_create_screen_internal(winsys);
> swr_screen(screen)->pfnSwrGetInterface = (PFNSwrGetInterface)pApiProc;
> swr_screen(screen)->is_knl = is_knl;
> +#endif
>
> return screen;
> }
> --
> 2.14.3
>
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