X-Git-Url: https://wimlib.net/git/?p=wimlib;a=blobdiff_plain;f=src%2Fcompress_parallel.c;h=c99c0a86826bc66b841a45ffe1224f57e195f6ab;hp=6cd306c2fcb96d5aa6d8b7e64c08c27022c3ff12;hb=affa6147e5c4c72bb22778368743e7203ea8fd79;hpb=44b239c501762cbee4ac0d218b144c937e642098

diff --git a/src/compress_parallel.c b/src/compress_parallel.c
index 6cd306c2..c99c0a86 100644
--- a/src/compress_parallel.c
+++ b/src/compress_parallel.c
@@ -43,6 +43,9 @@
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
+#ifdef HAVE_SYS_SYSCTL_H
+#  include <sys/sysctl.h>
+#endif
 
 struct message_queue {
 	struct list_head list;
@@ -116,12 +119,19 @@ get_avail_memory(void)
 	if (phys_bytes == 0)
 		goto default_size;
 	return phys_bytes;
-#else
+#elif defined(_SC_PAGESIZE) && defined(_SC_PHYS_PAGES)
 	long page_size = sysconf(_SC_PAGESIZE);
 	long num_pages = sysconf(_SC_PHYS_PAGES);
 	if (page_size <= 0 || num_pages <= 0)
 		goto default_size;
 	return ((u64)page_size * (u64)num_pages);
+#else
+	int mib[2] = {CTL_HW, HW_MEMSIZE};
+	u64 memsize;
+	size_t len = sizeof(memsize);
+	if (sysctl(mib, ARRAY_LEN(mib), &memsize, &len, NULL, 0) < 0 || len != 8)
+		goto default_size;
+	return memsize;
 #endif
 
 default_size:
@@ -438,8 +448,11 @@ new_parallel_chunk_compressor(int out_ctype, u32 out_chunk_size,
 			(u64)msgs_per_thread *
 			(u64)num_threads *
 			(u64)out_chunk_size
+			+ out_chunk_size
 			+ 1000000
-			+ (out_chunk_size * num_threads * 4);
+			+ num_threads * wimlib_get_compressor_needed_memory(out_ctype,
+									    out_chunk_size,
+									    NULL);
 		if (approx_mem_required <= max_memory)
 			break;
 
@@ -518,7 +531,9 @@ new_parallel_chunk_compressor(int out_ctype, u32 out_chunk_size,
 		if (ret) {
 			errno = ret;
 			ret = WIMLIB_ERR_NOMEM;
-			WARNING_WITH_ERRNO("Failed to create compressor thread %u of %u");
+			WARNING_WITH_ERRNO("Failed to create compressor thread %u of %u",
+					   ctx->num_started_threads + 1,
+					   num_threads);
 			goto err;
 		}
 	}