Use CRC32C implementation from ISA-L when available - enables VPCLMULQDQ version with AVX512 which is ~2x faster

src/blockstore/CMakeLists.txt

@@ -9,6 +9,7 @@ add_library(vitastor_blk SHARED
 )
 target_link_libraries(vitastor_blk
 	${LIBURING_LIBRARIES}
+	${ISAL_LIBRARIES}
 	tcmalloc_minimal
 	# for timerfd_manager
 	vitastor_common

src/disk_tool/CMakeLists.txt

@@ -12,4 +12,5 @@ add_executable(vitastor-disk
 target_link_libraries(vitastor-disk
 	tcmalloc_minimal
 	${LIBURING_LIBRARIES}
+	${ISAL_LIBRARIES}
 )

src/util/crc32c.c

@@ -39,6 +39,17 @@
 #include <unistd.h>
 #include "crc32c.h"
 
+#ifdef WITH_ISAL
+
+#include <isa-l/crc.h>
+
+uint32_t crc32c(uint32_t crc, const void *buf, size_t len)
+{
+    return crc32_iscsi((unsigned char*)buf, len, crc ^ 0xffffffff) ^ 0xffffffff;
+}
+
+#else
+
 /* CRC-32C (iSCSI) polynomial in reversed bit order. */
 #define POLY 0x82f63b78
 
@@ -377,6 +388,8 @@ uint32_t crc32c(uint32_t crc, const void *buf, size_t len)
 #endif
 }
 
+#endif
+
 static uint8_t zero_page[4096] = {};
 
 uint32_t crc32c_pad(uint32_t prev_crc, const void *buf, size_t len, size_t left_pad, size_t right_pad)