https://bugs.kde.org/show_bug.cgi?id=385055
Bug ID: 385055
Summary: PPC VEX temporary storage exhausted
Product: valgrind
Version: 3.14 SVN
Platform: Other
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: vex
Assignee: jsew...@acm.org
Reporter: c...@us.ibm.com
Target Milestone: ---
Power 9 application is receiving the error
Pool = TEMP, start 0x5861af28 curr 0x58adfa48 end 0x58adfa67 (size
5000000)
vex: the `impossible' happened:
VEX temporary storage exhausted.
Increase N_{TEMPORARY,PERMANENT}_BYTES and recompile.
I increased the N_TEMPORARY_BYTES and N_PERMANENT_BYTES #defines as
given below.
--- a/VEX/priv/main_util.c
+++ b/VEX/priv/main_util.c
@@ -55,10 +55,10 @@
#if defined(ENABLE_INNER)
/* 5 times more memory to be on the safe side: consider each
allocation is
8 bytes, and we need 16 bytes redzone before and after. */
-#define N_TEMPORARY_BYTES (5*5000000)
+#define N_TEMPORARY_BYTES (5*2000000000)
static Bool mempools_created = False;
#else
-#define N_TEMPORARY_BYTES 5000000
+#define N_TEMPORARY_BYTES 2000000000
#endif
static HChar temporary[N_TEMPORARY_BYTES]
__attribute__((aligned(REQ_ALIGN)));
@@ -70,9 +70,9 @@ static ULong temporary_bytes_allocd_TOT = 0;
#if defined(ENABLE_INNER)
/* See N_TEMPORARY_BYTES */
-#define N_PERMANENT_BYTES (5*10000)
+#define N_PERMANENT_BYTES (5*100000)
#else
-#define N_PERMANENT_BYTES 10000
+#define N_PERMANENT_BYTES 100000
Once these were increased both workloads then hit the error:
x264 [info]: profile High, level 3.1
vex: priv/host_generic_reg_alloc3.c:470 (doRegisterAllocation_v3):
Assertion `instrs_in->arr_used <= 15000' failed.
vex storage: T total 373013384 bytes allocated
vex storage: P total 192 bytes allocated
The issue appears to be the same issue seen on arm64 in bugzilla
https://bugs.kde.org/show_bug.cgi?id=375839
Per this bugzill, it was found that using the command line option
--vex-guest-max-insns=2 allowed the application to run but does appear to run
with a significant performance hit.
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