SOLUSI: SMP / multi-core tidak terdeteksi di Ubuntu

hardware, opensource, os, Teknoblogia, Ubuntu

Beberapa waktu yang lalu saya baru menyadari bahwa sebuah server saya, yang ditaruh di datacenter SoftLayer.com, ternyata cuma terdeteksi 1 core/CPU oleh operating systemnya; yaitu Ubuntu 8.04 (hardy). Padahal spec server tersebut adalah Quad-core Xeon.

Karena sebelumnya SoftLayer.com juga keliru mendeploy server tersebut – saya pesan 4 GB RAM dan 500 GB HD, namun hanya mereka pasang separuhnya; maka saya kira mereka juga keliru dalam pemasangan CPU-nya ini. No problem, lalu saya kirim lagi support request kepada customer service mereka.

Ternyata, menurut mereka, sudah betul terpasang CPU Xeon quad-core. Lho, tapi kenapa tidak terdeteksi oleh Ubuntu ya ?

Setelah saya cek dengan perintah uname -a yang muncul adalah output sbb :

Linux xxx.abangadek.com 2.6.24-19-386

Kemudian saya menanyakan masalah ini di channel #ubuntu di server irc.freenode.com
Luar biasa, ternyata dalam waktu beberapa menit saja saya sudah mendapatkan solusinya, yaitu :

apt-get install linux-image-generic
shutdown -r now

Karena ada proses instalasi kernel baru, maka sebelum melakukan perintah-perintah tersebut diatas, saya backup dulu data-data yang ada di server tersebut. Setelah itu, saya ketikkan perintah-perintah tersebut, dan menunggu dengan harap-harap cemas.

Bukan apa-apa, 3 jam lagi akan peak-time di Amerika, dan akan tiba ratusan ribu pengunjung yang mendatangi berbagai situs yang di hosting di server tersebut. Kalau sampai ada masalah dan terus berlanjut sampai peak time tersebut, maka jelas ini akan menimbulkan banyak kesulitan.

Alhamdulillah, worst-case scenario tersebut tidak terjadi 🙂
Proses pergantian kernel ini berjalan dengan sangat mulus. Dalam waktu 10 menit saja server tersebut sudah online & live kembali.

Kini perintah uname -a menampilkan output sbb :

Linux xxx.abangadek.com 2.6.24-19-generic #1 SMP

Yesss…. dan pada output di perintah top, jika saya menekan angka 1 (satu), maka statistik untuk 4 buah core muncul. Tidak lagi cuma 1 core 🙂

Syukurlah tidak ada yang serius. Ternyata teknisi SoftLayer hanya keliru memasang kernel – dia pasang kernel linux-image-386, yang tidak mendukung SMP (Symmetric Multi Processing). Padahal, seperti yang dicantumkan diatas, seharusnya yang dipasang adalah kernel linux-image-generic

Happy, and easy, ending.
Semoga bermanfaat.

86 thoughts on “SOLUSI: SMP / multi-core tidak terdeteksi di Ubuntu”

  5. Mas harry, tolong beri pencerahan donk… begini ceritanya, saya mau install suse11 dalam ubuntu 8.04 pk virtualbox bawaan reponya, tapi waktu mau running muncul pesan error spt ini :
    Make sure that the user has write permissions for /dev/vboxdrv by adding them to the vboxusers groups. You will need to logout for the change to take effect..
    VBox status code: -1909 (VERR_VM_DRIVER_NOT_ACCESSIBLE)

    Kenapa ya ? tolong dibantu… Mas wkt itu saya ikutan kopdar opensuse di rumah mas vavai. kalo mau iktan komunitas ubuntu yg gak cuman lewat forum/milis, tapi interaktif tatap muka dimana ya? sy tinggal di jakarta. thanks ya tolong kirim ke email sya.

  7. @agung – wah maaf komentarnya terlewat oleh saya. Tapi memang saya juga tidak begitu paham soal virtualbox juga.
    .
    Komunitas ubuntu tidak terlalu sering kopdar. Kalau ada yang mau kopdar, biasanya ada pengumumannya di milis.
    .
    Thanks

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  44. Wah brow kalo soal ubuntu ane baru coba-coba nich… masih katro… tapi salut dech artikelnya keren.. ;-P

  49. Linux… kayaknya bagus ya..
    tapi aku masih setia ma windows.. hihihi. kali aja aku kapan2 mau coba linux. TQ infonya mas harry

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