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Date: Wed, 5 Mar 2025 20:04:49 +0000
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Subject: Re: [PATCH v3] app/test: fix stack overflow in lpm6_perf_autotest
To: Andre Muezerie <andremue@linux.microsoft.com>, Bruce Richardson
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CC: <stephen@networkplumber.org>, <dev@dpdk.org>
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Hi Andre,
On 05/03/2025 14:45, Andre Muezerie wrote:
> On Wed, Mar 05, 2025 at 10:08:33AM +0000, Bruce Richardson wrote:
>> On Wed, Dec 18, 2024 at 07:21:26AM -0800, Andre Muezerie wrote:
>>> Test lpm6_perf_autotest was hitting a stack overflow on Windows
>>> with both MSVC and Clang.
>>>
>>> The fix is to move some of the data from the stack to the heap.
>>>
>>> Signed-off-by: Andre Muezerie<andremue@linux.microsoft.com>
>>> ---
>>> app/test/test_lpm6_perf.c | 13 +++++++++++--
>>> 1 file changed, 11 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/app/test/test_lpm6_perf.c b/app/test/test_lpm6_perf.c
>>> index 1860a99ed6..59df0a958a 100644
>>> --- a/app/test/test_lpm6_perf.c
>>> +++ b/app/test/test_lpm6_perf.c
>>> @@ -10,6 +10,7 @@
>>>
>>> #include <rte_cycles.h>
>>> #include <rte_random.h>
>>> +#include <rte_malloc.h>
>>> #include <rte_memory.h>
>>> #include <rte_lpm6.h>
>>>
>>> @@ -117,8 +118,13 @@ test_lpm6_perf(void)
>>> total_time = 0;
>>> count = 0;
>>>
>>> - struct rte_ipv6_addr ip_batch[NUM_IPS_ENTRIES];
>>> - int32_t next_hops[NUM_IPS_ENTRIES];
>>> + struct rte_ipv6_addr *ip_batch = rte_calloc("ip_batch",
>>> + NUM_IPS_ENTRIES, sizeof(struct rte_ipv6_addr), 0);
>>> + TEST_LPM_ASSERT(ip_batch != NULL);
>>> +
>>> + int32_t *next_hops = rte_calloc("next_hops",
>>> + NUM_IPS_ENTRIES, sizeof(int32_t), 0);
>>> + TEST_LPM_ASSERT(next_hops != NULL);
>>>
>> While I don't think we need to use the "rte_" versions of allocation, this
>> is still an ok fix - and I see that in v1 regular malloc was used.
> The reviewers had different opinions on which allocator function
> should be used, that's why it was changed. Thanks for being flexible on this.
As I mentioned earlier, I think it's better to use the memory allocated
from hugepages here since we are measuring performance.
Acked-by: Vladimir Medvedkin <vladimir.medvedkin@intel.com>
>
>> With either calloc or rte_calloc used.
>>
>> Acked-by: Bruce Richardson<bruce.richardson@intel.com>
>>
>>
>>> for (i = 0; i < NUM_IPS_ENTRIES; i++)
>>> ip_batch[i] = large_ips_table[i].ip;
>>> @@ -153,6 +159,9 @@ test_lpm6_perf(void)
>>> printf("Average LPM Delete: %g cycles\n",
>>> (double)total_time / NUM_ROUTE_ENTRIES);
>>>
>>> + rte_free(next_hops);
>>> + rte_free(ip_batch);
>>> +
>>> rte_lpm6_delete_all(lpm);
>>> rte_lpm6_free(lpm);
>>>
>>> --
>>> 2.47.0.vfs.0.3
>>>
--
Regards,
Vladimir
--------------cNLhPMok0UU3SULGD3ss07MQ
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: 7bit
<!DOCTYPE html><html><head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<p>Hi Andre,<br>
</p>
<div class="moz-cite-prefix">On 05/03/2025 14:45, Andre Muezerie
wrote:<br>
</div>
<blockquote type="cite" cite="mid:20250305144531.GA32194@linuxonhyperv3.guj3yctzbm1etfxqx2vob5hsef.xx.internal.cloudapp.net">
<pre wrap="" class="moz-quote-pre">On Wed, Mar 05, 2025 at 10:08:33AM +0000, Bruce Richardson wrote:
</pre>
<blockquote type="cite">
<pre wrap="" class="moz-quote-pre">On Wed, Dec 18, 2024 at 07:21:26AM -0800, Andre Muezerie wrote:
</pre>
<blockquote type="cite">
<pre wrap="" class="moz-quote-pre">Test lpm6_perf_autotest was hitting a stack overflow on Windows
with both MSVC and Clang.
The fix is to move some of the data from the stack to the heap.
Signed-off-by: Andre Muezerie <a class="moz-txt-link-rfc2396E" href="mailto:andremue@linux.microsoft.com"><andremue@linux.microsoft.com></a>
---
app/test/test_lpm6_perf.c | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)
diff --git a/app/test/test_lpm6_perf.c b/app/test/test_lpm6_perf.c
index 1860a99ed6..59df0a958a 100644
--- a/app/test/test_lpm6_perf.c
+++ b/app/test/test_lpm6_perf.c
@@ -10,6 +10,7 @@
#include <rte_cycles.h>
#include <rte_random.h>
+#include <rte_malloc.h>
#include <rte_memory.h>
#include <rte_lpm6.h>
@@ -117,8 +118,13 @@ test_lpm6_perf(void)
total_time = 0;
count = 0;
- struct rte_ipv6_addr ip_batch[NUM_IPS_ENTRIES];
- int32_t next_hops[NUM_IPS_ENTRIES];
+ struct rte_ipv6_addr *ip_batch = rte_calloc("ip_batch",
+ NUM_IPS_ENTRIES, sizeof(struct rte_ipv6_addr), 0);
+ TEST_LPM_ASSERT(ip_batch != NULL);
+
+ int32_t *next_hops = rte_calloc("next_hops",
+ NUM_IPS_ENTRIES, sizeof(int32_t), 0);
+ TEST_LPM_ASSERT(next_hops != NULL);
</pre>
</blockquote>
<pre wrap="" class="moz-quote-pre">
While I don't think we need to use the "rte_" versions of allocation, this
is still an ok fix - and I see that in v1 regular malloc was used.
</pre>
</blockquote>
<pre wrap="" class="moz-quote-pre">
The reviewers had different opinions on which allocator function
should be used, that's why it was changed. Thanks for being flexible on this.</pre>
</blockquote>
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<w:LsdException Locked="false" Priority="32" QFormat="true"
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<w:LsdException Locked="false" Priority="37" SemiHidden="true"
UnhideWhenUsed="true" Name="Bibliography"/>
<w:LsdException Locked="false" Priority="39" SemiHidden="true"
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<w:LsdException Locked="false" Priority="41" Name="Plain Table 1"/>
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Name="Grid Table 1 Light Accent 1"/>
<w:LsdException Locked="false" Priority="47" Name="Grid Table 2 Accent 1"/>
<w:LsdException Locked="false" Priority="48" Name="Grid Table 3 Accent 1"/>
<w:LsdException Locked="false" Priority="49" Name="Grid Table 4 Accent 1"/>
<w:LsdException Locked="false" Priority="50" Name="Grid Table 5 Dark Accent 1"/>
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Name="Grid Table 7 Colorful Accent 1"/>
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<w:LsdException Locked="false" Priority="49" Name="Grid Table 4 Accent 2"/>
<w:LsdException Locked="false" Priority="50" Name="Grid Table 5 Dark Accent 2"/>
<w:LsdException Locked="false" Priority="51"
Name="Grid Table 6 Colorful Accent 2"/>
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Name="List Table 7 Colorful Accent 6"/>
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Name="Mention"/>
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Name="Smart Hyperlink"/>
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Name="Hashtag"/>
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Name="Unresolved Mention"/>
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Name="Smart Link"/>
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</xml><![endif]--><!--[if gte mso 10]>
<style>
/* Style Definitions */
table.MsoNormalTable
{mso-style-name:"Table Normal";
mso-tstyle-rowband-size:0;
mso-tstyle-colband-size:0;
mso-style-noshow:yes;
mso-style-priority:99;
mso-style-parent:"";
mso-padding-alt:0cm 5.4pt 0cm 5.4pt;
mso-para-margin:0cm;
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font-family:"Aptos",sans-serif;
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mso-hansi-theme-font:minor-latin;
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mso-ligatures:standardcontextual;
mso-fareast-language:EN-US;}
</style>
<![endif]-->
<p class="MsoPlainText">As I mentioned earlier, I think it's better
to use the
memory allocated from hugepages here since we are measuring
performance.</p>
<p>Acked-by: Vladimir Medvedkin <a class="moz-txt-link-rfc2396E" href="mailto:vladimir.medvedkin@intel.com"><vladimir.medvedkin@intel.com></a></p>
<blockquote type="cite" cite="mid:20250305144531.GA32194@linuxonhyperv3.guj3yctzbm1etfxqx2vob5hsef.xx.internal.cloudapp.net">
<pre wrap="" class="moz-quote-pre">
</pre>
<blockquote type="cite">
<pre wrap="" class="moz-quote-pre">
With either calloc or rte_calloc used.
Acked-by: Bruce Richardson <a class="moz-txt-link-rfc2396E" href="mailto:bruce.richardson@intel.com"><bruce.richardson@intel.com></a>
</pre>
<blockquote type="cite">
<pre wrap="" class="moz-quote-pre"> for (i = 0; i < NUM_IPS_ENTRIES; i++)
ip_batch[i] = large_ips_table[i].ip;
@@ -153,6 +159,9 @@ test_lpm6_perf(void)
printf("Average LPM Delete: %g cycles\n",
(double)total_time / NUM_ROUTE_ENTRIES);
+ rte_free(next_hops);
+ rte_free(ip_batch);
+
rte_lpm6_delete_all(lpm);
rte_lpm6_free(lpm);
--
2.47.0.vfs.0.3
</pre>
</blockquote>
</blockquote>
</blockquote>
<pre class="moz-signature" cols="72">--
Regards,
Vladimir</pre>
</body>
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