The 'bs' and 'bssplit' configuration variables accept separate numbers for read and write operations if you separate them with a comma. For example:
bssplit=1k/39:8k/50:64k/11,1k/29:8k/50:64k/21
The documentation for 'bsrange' says it works the same way, but if I try to specify two ranges with a comma, I get an error when I run the app. E.g. if I put this line in the configuration file:
bsrange=1k-16k,2k-32k
I get this error output:
fio: pid=26861, err=22/file:engines/sync.c:62, func=xfer, error=Invalid argument
Here's my attempt at a patch for this:
*** fio-1.57-orig/parse.c 2011-07-14 11:20:25.000000000 -0700
--- fio-1.57/parse.c 2011-07-23 11:38:12.000000000 -0700
***************
*** 453,458 ****
--- 453,464 ----
strncpy(tmp, ptr, sizeof(tmp) - 1);
+ // Handle bsrange with separate read,write values:
+ p1 = strchr(tmp, ',');
+ if (p1) {
+ *p1 = '\0';
+ }
+
p1 = strchr(tmp, '-');
if (!p1) {
p1 = strchr(tmp, ':');
--
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