<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">V prvni chvili jsem misto “ultrasilne” cetl “ultrashnile” :D<div class=""><br class=""></div><div class="">—</div><div class="">Stanislav Petr</div><div class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">9. 1. 2018 v 21:47, Stepan Liska <<a href="mailto:stepan@comlinks.cz" class="">stepan@comlinks.cz</a>>:</div><br class="Apple-interchange-newline"><div class="">
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<span style="font-family: helvetica,arial,sans-serif;" class="">Ahoj,<br class="">
<br class="">
dnes mi přišel mail od CZC s předmětem "Co běží na Intelu, to je
ultrasilné". Opravdu pobavili.<br class="">
<br class="">
Š.<br class="">
</span>
<div class="moz-cite-prefix">Dne 5.1.2018 v 11:48 Miroslav Marcišin
napsal(a):<br class="">
</div>
<blockquote type="cite" cite="mid:13a31867-80d6-47f5-bf68-c430cf6dc5fd@Spark" class="">
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<div name="messageBodySection" class="">Ahoj,
<div class=""><br class="">
</div>
<div class="">v rychlosti jsen na tom následnovně:</div>
<div class=""><br class="">
</div>
<div class="">node3</div>
<div class=""><p class=""><span class="">dd if=/dev/zero of=/dev/null count=10M</span></p><p class=""><span class="">10485760+0 records in</span></p><p class=""><span class="">10485760+0 records out</span></p><p class=""><span class="">5368709120 bytes (5.4 GB) copied, 5.03158 s, 1.1 GB/s</span></p><p class=""><span class=""><br class="">
</span></p><p class=""><span class=""><br class="">
</span></p><p class=""><span class="">node4</span></p><p class=""><span class="">dd if=/dev/zero of=/dev/null count=10M</span></p><p class=""><span class="">10485760+0 records in</span></p><p class=""><span class="">10485760+0 records out</span></p><div class=""><span class=""></span><br class="webkit-block-placeholder"></div><p class=""><span class="">5368709120 bytes (5.4 GB) copied, 5.99605 s, 895 MB/s</span></p><p class=""><span class=""><br class="">
</span></p><p class=""><span class=""><br class="">
</span></p><p class=""><span class=""><br class="">
</span></p><p class=""><span class="">node7</span></p><p class=""><span class="">dd if=/dev/zero of=/dev/null count=10M</span></p><p class=""><span class="">10485760+0 záznamů přečteno</span></p><p class=""><span class="">10485760+0 záznamů zapsáno</span></p><div class=""><span class=""></span><br class="webkit-block-placeholder"></div><p class=""><span class="">5 368 709 120 bajtů (5,4 GB) zkopírováno, 7,8315 s,
686 MB/s</span></p><p class=""><span class=""><br class="">
</span></p><p class=""><span class=""><br class="">
</span></p><p class=""><span class="">playground</span></p><p class=""><span class="">dd if=/dev/zero of=/dev/null count=10M</span></p><p class=""><span class="">10485760+0 záznamů přečteno</span></p><p class=""><span class="">10485760+0 záznamů zapsáno</span></p><div class=""><span class=""></span><br class="webkit-block-placeholder"></div><p class=""><span class="">5 368 709 120 bajtů (5,4 GB) zkopírováno, 14,5455 s,
369 MB/s</span></p>
</div>
</div>
<div name="messageSignatureSection" class=""><br class="">
<div class=""><br class="">
</div>
<div class=""><br class="">
</div>
<div class="">Meltdown na node3,4,7,8 OK</div>
<div class=""><br class="">
</div>
<div class=""><br class="">
</div>
<div class="">Spectre se mi povedlo na 3,4 a 8 - na 7 možná jenom něco
dělám blbě, jdu pokračovat</div>
<div class=""><br class="">
</div>
<div class="">MM</div>
<div class=""><br class="">
</div>
</div>
<div name="messageReplySection" class=""><br class="">
On 5. 1. 2018 11:29 +0100, Stanislav Petr <a class="moz-txt-link-rfc2396E" href="mailto:glux@glux.org"><glux@glux.org></a>,
wrote:<br class="">
<blockquote type="cite" class="">Tak prvni test z playgroundu:<br class="">
<br class="">
1. rychlost<br class="">
<br class="">
na node5:<br class="">
dd if=/dev/zero of=/dev/null count=10M<br class="">
10485760+0 records in<br class="">
10485760+0 records out<br class="">
5368709120 bytes (5.4 GB, 5.0 GiB) copied, 6.3351 s, 847 MB/s<br class="">
<br class="">
na playgrundu:<br class="">
dd if=/dev/zero of=/dev/null count=10M<br class="">
10485760+0 záznamů přečteno<br class="">
10485760+0 záznamů zapsáno<br class="">
5 368 709 120 bajtů (5,4 GB) zkopírováno, 14,0076 s, 383 MB/s<br class="">
<br class="">
2. pristup do pameti hostitele (Meltdown)<br class="">
<br class="">
zda se za asi OK.<br class="">
<br class="">
3. randomizace pameti (Spectre)<br class="">
<br class="">
zda se mi ze spectre se mi dari celkem uspesne exploitnout…
Myslim ze ti tady nekde zkusim otestovat originalni RedHat 6
kernel a porovnat vysledky.<br class="">
<br class="">
—<br class="">
Stanislav Petr<br class="">
<br class="">
<br class="">
<blockquote type="cite" class="">5. 1. 2018 v 8:25, Pavel Snajdr
<a class="moz-txt-link-rfc2396E" href="mailto:snajpa@snajpa.net"><snajpa@snajpa.net></a>:<br class="">
<br class="">
Mas pravdu. (a je vas vic).<br class="">
<br class="">
Je to nasazene na playgroundu, prosim, testujte.<br class="">
<br class="">
/snajpa<br class="">
<br class="">
On 2018-01-05 08:22, zd nex wrote:<br class="">
<blockquote type="cite" class="">Zdravím,<br class="">
pokud je možné počkat na ten večer, byl bych radši.<br class="">
--<br class="">
S pozdravem,<br class="">
Zdeněk Dlauhý<br class="">
<a class="moz-txt-link-abbreviated" href="mailto:Email:support@pripravto.cz">Email:support@pripravto.cz</a><br class="">
Mobil: +420 702 549 370<br class="">
Web: <a class="moz-txt-link-abbreviated" href="http://www.pripravto.cz/">www.pripravto.cz</a> [2]<br class="">
Dne 5. ledna 2018 8:18 Pavel Snajdr
<a class="moz-txt-link-rfc2396E" href="mailto:snajpa@snajpa.net"><snajpa@snajpa.net></a> napsal(a):<br class="">
<blockquote type="cite" class="">EN-TLDR: I have a patch for
Meltdown ready. Do we deploy now or wait<br class="">
until after midnight?<br class="">
Mam naportovany patch z RHEL6 na nase OpenVZ jadro.<br class="">
Taky overenou funkcnost na trech serverech (jeden z toho
je<br class="">
node1.pgnd, dva testovaci).<br class="">
Jdeme to aplikovat hned? Prezijete vypadek?<br class="">
/snajpa<br class="">
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