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rteval-loads/SOURCES/0019-stress-vm-fix-bit-erro...

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From 6ec3d71be8bd09d45979c6fb8759088690871e1c Mon Sep 17 00:00:00 2001
From: Colin Ian King <colin.king@canonical.com>
Date: Thu, 21 May 2020 10:30:35 +0100
Subject: [PATCH 19/28] stress-vm: fix bit error checking when bogo-ops limits
reached
There are some vm methods that abort early when the bogo-ops limit
has been reached and then sanity check the all the data even though
the all the data has not been set because of the premature abort.
Fix this so that we only sanity check full runs of data.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
stress-vm.c | 99 ++++++++++++++++++++++++++++-------------------------
1 file changed, 52 insertions(+), 47 deletions(-)
diff --git a/stress-vm.c b/stress-vm.c
index 6542f4b7c822..c776b3427c25 100644
--- a/stress-vm.c
+++ b/stress-vm.c
@@ -350,11 +350,11 @@ static size_t TARGET_CLONES stress_vm_moving_inversion(
bit_errors++;
*(ptr++) = ~val;
c++;
- if (UNLIKELY(max_ops && c >= max_ops))
- goto abort;
- if (UNLIKELY(!keep_stressing_flag()))
- goto abort;
}
+ if (UNLIKELY(max_ops && c >= max_ops))
+ goto ret;
+ if (UNLIKELY(!keep_stressing_flag()))
+ goto ret;
(void)stress_mincore_touch_pages(buf, sz);
@@ -363,22 +363,22 @@ static size_t TARGET_CLONES stress_vm_moving_inversion(
stress_mwc_seed(w, z);
for (bit_errors = 0, ptr = (uint64_t *)buf; ptr < buf_end; ) {
uint64_t val = stress_mwc64();
+
if (UNLIKELY(*(ptr++) != ~val))
bit_errors++;
c++;
- if (UNLIKELY(max_ops && c >= max_ops))
- goto abort;
- if (UNLIKELY(!keep_stressing_flag()))
- goto abort;
}
+ if (UNLIKELY(max_ops && c >= max_ops))
+ goto ret;
+ if (UNLIKELY(!keep_stressing_flag()))
+ goto ret;
stress_mwc_seed(w, z);
for (ptr = (uint64_t *)buf_end; ptr > (uint64_t *)buf; ) {
*--ptr = stress_mwc64();
- c++;
- if (UNLIKELY(max_ops && c >= max_ops))
- goto abort;
}
+ if (UNLIKELY(!keep_stressing_flag()))
+ goto ret;
inject_random_bit_errors(buf, sz);
@@ -386,26 +386,34 @@ static size_t TARGET_CLONES stress_vm_moving_inversion(
stress_mwc_seed(w, z);
for (ptr = (uint64_t *)buf_end; ptr > (uint64_t *)buf; ) {
uint64_t val = stress_mwc64();
+
if (UNLIKELY(*--ptr != val))
bit_errors++;
*ptr = ~val;
c++;
- if (UNLIKELY(max_ops && c >= max_ops))
- goto abort;
- if (UNLIKELY(!keep_stressing_flag()))
- goto abort;
}
+ if (UNLIKELY(max_ops && c >= max_ops))
+ goto ret;
+ if (UNLIKELY(!keep_stressing_flag()))
+ goto ret;
+
stress_mwc_seed(w, z);
for (ptr = (uint64_t *)buf_end; ptr > (uint64_t *)buf; ) {
uint64_t val = stress_mwc64();
+
if (UNLIKELY(*--ptr != ~val))
bit_errors++;
- if (UNLIKELY(!keep_stressing_flag()))
- goto abort;
+ c++;
}
+ if (UNLIKELY(max_ops && c >= max_ops))
+ goto ret;
+ if (UNLIKELY(!keep_stressing_flag()))
+ goto ret;
-abort:
+ret:
stress_vm_check("moving inversion", bit_errors);
+ if (UNLIKELY(max_ops && c >= max_ops))
+ c = max_ops;
set_counter(args, c);
return bit_errors;
@@ -438,40 +446,40 @@ static size_t TARGET_CLONES stress_vm_modulo_x(
for (i = 0; i < stride; i++) {
for (ptr = buf + i; ptr < buf_end; ptr += stride) {
*ptr = pattern;
- if (UNLIKELY(!keep_stressing_flag()))
- goto abort;
}
+ if (UNLIKELY(!keep_stressing_flag()))
+ goto ret;
for (ptr = buf; ptr < buf_end; ptr += stride) {
for (j = 0; j < i && ptr < buf_end; j++) {
*ptr++ = compliment;
c++;
- if (UNLIKELY(max_ops && c >= max_ops))
- goto abort;
}
- if (!keep_stressing_flag())
- goto abort;
+ if (UNLIKELY(!keep_stressing_flag()))
+ goto ret;
ptr++;
for (j = i + 1; j < stride && ptr < buf_end; j++) {
*ptr++ = compliment;
c++;
- if (UNLIKELY(max_ops && c >= max_ops))
- goto abort;
}
if (UNLIKELY(!keep_stressing_flag()))
- goto abort;
+ goto ret;
}
inject_random_bit_errors(buf, sz);
for (ptr = buf + i; ptr < buf_end; ptr += stride) {
if (UNLIKELY(*ptr != pattern))
bit_errors++;
- if (UNLIKELY(!keep_stressing_flag()))
- return bit_errors;
}
+ if (UNLIKELY(!keep_stressing_flag()))
+ break;
+ if (UNLIKELY(max_ops && c >= max_ops))
+ break;
}
-abort:
+ if (UNLIKELY(max_ops && c >= max_ops))
+ c = max_ops;
stress_vm_check("modulo X", bit_errors);
+ret:
set_counter(args, c);
return bit_errors;
@@ -676,9 +684,6 @@ static size_t TARGET_CLONES stress_vm_gray(
if (UNLIKELY(!keep_stressing_flag()))
return 0;
*ptr = (v >> 1) ^ v;
- c++;
- if (UNLIKELY(max_ops && c >= max_ops))
- break;
}
(void)stress_mincore_touch_pages(buf, sz);
inject_random_bit_errors(buf, sz);
@@ -724,18 +729,15 @@ static size_t TARGET_CLONES stress_vm_incdec(
for (ptr = buf; ptr < buf_end; ptr++) {
*ptr += val;
- c++;
- if (UNLIKELY(max_ops && c >= max_ops))
- break;
}
(void)stress_mincore_touch_pages(buf, sz);
inject_random_bit_errors(buf, sz);
for (ptr = buf; ptr < buf_end; ptr++) {
*ptr -= val;
- c++;
- if (UNLIKELY(max_ops && c >= max_ops))
- break;
}
+ c += sz;
+ if (UNLIKELY(max_ops && c >= max_ops))
+ c = max_ops;
for (ptr = buf; ptr < buf_end; ptr++) {
if (UNLIKELY(*ptr != 0))
@@ -1253,9 +1255,6 @@ static size_t TARGET_CLONES stress_vm_galpat_zero(
break;
}
}
- c++;
- if (UNLIKELY(max_ops && c >= max_ops))
- break;
}
(void)stress_mincore_touch_pages(buf, sz);
inject_random_bit_errors(buf, sz);
@@ -1270,14 +1269,18 @@ static size_t TARGET_CLONES stress_vm_galpat_zero(
bits_set += stress_vm_count_bits(*(ptr + 6));
bits_set += stress_vm_count_bits(*(ptr + 7));
+ c++;
if (UNLIKELY(!keep_stressing_flag()))
- break;
+ goto ret;
}
if (bits_set != bits_bad)
bit_errors += UNSIGNED_ABS(bits_set, bits_bad);
stress_vm_check("galpat-zero", bit_errors);
+ret:
+ if (UNLIKELY(max_ops && c >= max_ops))
+ c = max_ops;
set_counter(args, c);
return bit_errors;
@@ -1315,9 +1318,6 @@ static size_t TARGET_CLONES stress_vm_galpat_one(
break;
}
}
- c++;
- if (UNLIKELY(max_ops && c >= max_ops))
- break;
}
(void)stress_mincore_touch_pages(buf, sz);
inject_random_bit_errors(buf, sz);
@@ -1331,14 +1331,19 @@ static size_t TARGET_CLONES stress_vm_galpat_one(
bits_set += stress_vm_count_bits(~(*(ptr + 5)));
bits_set += stress_vm_count_bits(~(*(ptr + 6)));
bits_set += stress_vm_count_bits(~(*(ptr + 7)));
+
+ c++;
if (UNLIKELY(!keep_stressing_flag()))
- break;
+ goto ret;
}
if (bits_set != bits_bad)
bit_errors += UNSIGNED_ABS(bits_set, bits_bad);
stress_vm_check("galpat-one", bit_errors);
+ret:
+ if (UNLIKELY(max_ops && c >= max_ops))
+ c = max_ops;
set_counter(args, c);
return bit_errors;
--
2.21.3
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