Commit b151d3ba authored by Philippe Gerum's avatar Philippe Gerum

copperplate/init: disambiguate --mem-pool-size argument

The value passed to --mem-pool-size used to represent kilobytes, which
is at odds with the byte unit required by the mem_pool_size tunable.

--mem-pool-size now accepts a unit K|M|G suffix to values, defaulting
to bytes. For backward compatibility, any non-suffixed value below
65536 is interpreted as a count of kilobytes, not bytes,
e.g. --mem-pool-size=8192 will create a 8M heap for the
application. This conversion is noisy, to call for a parameter update
asap, unless --no-sanity is in effect.

If you need a tiny heap size below 64k, pass a kilobyte value with a 'K'
parent 0da6b0d2
......@@ -21,6 +21,7 @@
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <ctype.h>
#include <pwd.h>
#include <errno.h>
#include <getopt.h>
......@@ -193,9 +194,24 @@ static int copperplate_init(void)
static int copperplate_parse_option(int optnum, const char *optarg)
size_t memsz;
switch (optnum) {
case mempool_opt:
__copperplate_setup_data.mem_pool = atoi(optarg) * 1024;
memsz = get_mem_size(optarg);
if (memsz == 0)
return -EINVAL;
* Emulate former sloppy syntax: values below 64k are
* likely to represent kilobytes, not bytes.
if (isdigit(optarg[strlen(optarg)-1]) &&
memsz < 64 * 1024) {
memsz *= 1024;
if (__base_setup_data.no_sanity == 0)
warning("--mem-pool-size=<size[K|M|G]>, using %Zu bytes", memsz);
__copperplate_setup_data.mem_pool = memsz;
case session_opt:
__copperplate_setup_data.session_label = strdup(optarg);
......@@ -216,7 +232,7 @@ static int copperplate_parse_option(int optnum, const char *optarg)
static void copperplate_help(void)
fprintf(stderr, "--mem-pool-size=<sizeK> size of the main heap (kbytes)\n");
fprintf(stderr, "--mem-pool-size=<size[K|M|G]> size of the main heap\n");
fprintf(stderr, "--no-registry suppress object registration\n");
fprintf(stderr, "--shared-registry enable public access to registry\n");
fprintf(stderr, "--registry-root=<path> root path of registry\n");
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